Solvent

Vim Li Cas Xaiv Peb

Kev sib tw tshaj plaws

Nrog ntau tshaj 10 xyoo kev ua haujlwm, peb ib txwm muab cov nqi sib tw tshaj plaws rau cov neeg siv khoom los pab txo lawv cov nqi hauv daim ntawv thov.

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Peb cov neeg ua haujlwm paub txog kev mob siab rau teb tag nrho koj cov lus nug, kev tawm tswv yim lossis lwm yam kev xav tau hauv 24 teev. Peb zoo siab tos txais koj hu rau peb kom paub ntau ntxiv thiab tos ntsoov yuav ua haujlwm nrog koj.

Siab Zoo

Peb cov khoom tau txais ncaj qha los ntawm cov chaw tsim khoom thiab txhua tus ua tib zoo tsim nyog los xyuas kom ua raws li EHS & S, ntim, thiab cov qauv zoo. Peb cov khoom siv zog saib xyuas muab kev noj qab haus huv, kev nyab xeeb, thiab ib puag ncig cov ntaub ntawv tseem ceeb rau peb cov neeg koom tes hauv cov khoom siv.

Kev paub nplua nuj

Peb nkag siab txog yam dab tsi cuam tshuam rau kev xa khoom thiab kev xav tau, cov khoom muaj, thiab tus nqi thiab peb muab cov kev paub no nrog peb cov neeg koom tes hauv cov khoom lag luam tsis tu ncua. Peb muab cov ntaub ntawv hais txog cov khoom lag luam thiab kev txheeb xyuas kev lag luam los pab koj txiav txim siab ua lag luam zoo dua.

Solvent yog dab tsi

Cov kuab tshuaj yog cov kua uas tuaj yeem yaj cov khoom, kua los yog gaseous solute rau hauv cov kua. Qhov hnyav tshaj plaws hauv lub neej niaj hnub yog dej. Lub npe hu ua cov kuab tshuaj organic yog cov kuab tshuaj organic uas muaj cov pa roj carbon atoms. Cov kuab tshuaj feem ntau muaj cov ntsiab lus qis qis thiab yooj yim rau evaporate. Los yog nws tuaj yeem raug tshem tawm los ntawm distillation, tawm hauv cov khoom yaj tom qab. Yog li ntawd, cov kuab tshuaj tsis tuaj yeem ua rau tshuaj lom neeg nrog cov kuab tshuaj. Lawv yuav tsum muaj kev ua haujlwm tsawg.

Ethyl 3-EthoxyProdopionate Ntau

Cov txiaj ntsig ntawm Solvent

01/

Zoo Solubility Properties
Cov kuab tshuaj muaj peev xwm ua kom yaj ntau yam ntawm cov kuab tshuaj, txawm tias khoom, kua lossis roj. Qhov no ua rau cov kuab tshuaj tau siv dav hauv ntau lub teb, xws li kev lag luam tu, tshuaj synthesis, kev kho mob, thiab lwm yam.

02/

Kev nyab xeeb
Cov kuab tshuaj feem ntau suav hais tias muaj kev nyab xeeb vim tias lawv tsis hnov mob nrog cov kuab tshuaj lossis ua rau muaj kev phom sij rau tib neeg. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias qee cov kuab tshuaj yuav ua rau muaj kev phom sij rau ib puag ncig lossis muaj kev tiv thaiv tshwj xeeb los ua raws.

03/

Volatility Thiab Boiling Point
Cov kuab tshuaj feem ntau muaj qhov kub qis dua, tso cai rau lawv kom yooj yim evaporate, uas yuav pab txo qis kev hloov pauv ntawm qhov ceev thaum khaws cia thiab tseem ua rau cov kuab tshuaj tshem tawm yooj yim dua, xws li los ntawm distillation.

04/

Nqi-zoo
Cov kuab tshuaj kuj pheej yig thiab siv tsawg dua thaum siv. Cov yam ntxwv no ua rau cov kuab tshuaj ntau dua kev lag luam zoo.

05/

Ntau haiv neeg
Muaj ntau ntau hom kuab tshuaj, xws li dej, cawv, ethers, ketones thiab lwm yam organic tebchaw, txhua tus muaj cov yam ntxwv sib txawv thiab siv.

06/

Adjustable Nta
Qee cov kuab tshuaj, xws li cawv, tuaj yeem kho lawv qhov tsis muaj zog los ntawm kev kho lawv cov khoom kom tau raws li qhov xav tau ntawm cov txheej txheem tshwj xeeb.

Dab tsi yog Daim Ntawv Thov ntawm Solvent

Paints Thiab Coatings
Hauv kev siv cov xim, cov kuab tshuaj yog siv los yaj lossis yaj cov khoom xyaw uas siv hauv cov xim pleev xim. Lub hom phiaj ntawm kev siv no yog kom ua tiav qhov xav tau sib xws ntawm cov xim thaum siv thiab kom tsis txhob clumping ntawm cov xim. Lwm qhov piv txwv ntawm kev siv cov kuab tshuaj yog glycol ether esters, uas tau ntxiv rau ntau cov tshuaj tsuag los tiv thaiv lawv los ntawm ziab hauv huab cua.

Ink
Inks yog siv los luam tawm txhua yam los ntawm cov ntawv xov xwm mus rau ntim thiab cov ntawv sau zaub mov, siv kom raug rau cov txiaj ntsig zoo. Hauv kev siv tus cwj mem, cov kuab tshuaj siv yog hydrocarbon hnyav. Toluene yog ib qho hnyav uas siv los ua tus cwj mem hnyav hauv cov ntawv xov xwm tshwj xeeb luam ntawv vim nws evaporates sai txaus los tiv thaiv staining thiab residual toluene yog yooj yim siv dua.

Cov Khoom Siv Kho Tus Kheej
Ntau cov tshuaj pleev ib ce tso siab rau cov kuab tshuaj kom yaj cov khoom xyaw thiab ua kom cov khoom sib xyaw ua haujlwm zoo. Ib qho piv txwv ntawm cov kuab tshuaj yog siv nyob rau hauv cov tshuaj pleev ib ce, hmoov thiab shaving cream los muab txoj cai sib xws rau cov khoom. Ib qho piv txwv ntawm cov kuab tshuaj siv rau hauv kev saib xyuas tus kheej yog ethanol, uas yog siv los ntawm cov tuam txhab naj hoom raws li lawv qhov hnyav ntawm kev xaiv vim nws tsis muaj ntxhiab tsw. Ethanol's qis boiling point txhais tau hais tias cov kuab tshuaj evaporates sai sai thiab tsis muaj residue ntawm daim tawv nqaij. Dhau li ntawm ethanol, lwm cov kuab tshuaj siv yog ethyl acetate los yog acetone, uas yog siv rau hauv cov ntsia thawv polish vim nws ceev kom qhuav ceev. Nws kuj yog siv rau hauv cov kua ntsia thawv polish tshem tawm thiab nws cov solubility siab txhais tau tias nws tuaj yeem tshem tau yooj yim ntawm cov ntsia hlau.

Cov khoom siv ntxuav
Ib qho ntawm cov kuab tshuaj siv hauv cov khoom siv tu yog glycol ether, uas yog qhov zoo heev los ua cov khoom siv hauv kev tu cov qauv rau cov iav tuab, cov plag tsev, thiab lwm yam tawv tawv. Cov kuab tshuaj no muaj dej zoo sib xws, siab solubility rau roj thiab roj, thiab zoo biodegradability. Ntxiv rau qhov no, lwm cov kuab tshuaj siv yog isoparaffin uas yog siv rau ziab khaub ncaws. Cov kuab tshuaj no yog siv los ntawm nws cov ntxhiab tsw, kev noj qab haus huv thiab ib puag ncig cov yam ntxwv, kev nyab xeeb tuav thiab kev ua haujlwm zoo heev.

Health Field
Cov kuab tshuaj yog siv ntau pua ntawm cov tshuaj thiab muaj nyob rau hauv ntau yam tshuaj uas tib neeg siv niaj hnub no, los ntawm penicillin mus rau tshuaj aspirin, hnoos syrups thiab tshuaj pleev. Ib qho piv txwv ntawm cov kuab tshuaj siv hauv kev noj qab haus huv yog butyl acetate uas yog siv los ntxuav cov penicillin los ntawm kev khaws cov impurities hauv cov tshuaj thaum xaiv cov tshuaj penicillin los ntawm cov tshuaj tiv thaiv sib tov los ntawm kev rho tawm.

Hom Solvent

01.

Polar Solvent
Polar solvents ua haujlwm los ntawm kev cuam tshuam nrog ob qho tib si solute thiab qhov zoo thiab qhov tsis zoo ntawm txhua lub atom. Los ntawm cov hluav taws xob tsub nqi ntawm ntau yam solute molecule, ib tug polar solvent dissolves ib tug solute. Cov tshuaj ionic, xws li ntsev, tuaj yeem yaj los ntawm cov kua polar los ntawm kev kos duab ntawm cov molecules nrog cov nqi tawm tsam. Cov ions tsis zoo yog kos rau sab zoo ntawm lwm cov kuab tshuaj molecules. Tom qab ntawd cov ions sib npaug sib npaug thoob plaws qhov hnyav hauv qhov no.

Nonpolar Solvent
Nonpolar solvents ua haujlwm tib yam li cov kuab tshuaj polar ua. Nonpolar cov tebchaw uas ua haujlwm raws li cov kuab tshuaj yog nquag ua rau cov dipoles, txhais tau tias lawv qee zaus tsim kev tawm tsam hluav taws xob ntawm cov ntawv cog lus. Cov hluav taws xob tam sim no ua rau tsim cov dipoles nyob rau hauv ib puag ncig cov kuab tshuaj molecules. Lwm cov molecules nonpolar tuaj yeem yaj vim qhov kev cuam tshuam luv luv no.

02.

Aprotic Solvents
Aprotic kuab tshuaj tsis tso tawm protons; Hloov chaw, lawv tuaj yeem ua haujlwm raws li cov kuab tshuaj yooj yim, qhov twg qhov dielectric tas li qhia qhov polarity ntau lossis raws li qhov yooj yim aprotic, tus neeg txais proton. Aprotic cov kuab tshuaj yog polar kua molecules tsis muaj hydrogen atoms uas tuaj yeem sib cais. Cov kuab tshuaj no tsis suav nrog cov tshuaj lom neeg xws li OH lossis NH daim ntawv cog lus. Yog li ntawd, pawg hydroxyl (-OH) thiab amine (-NH2) tsis muaj nyob rau hauv cov kuab tshuaj aprotic thiab tsis tuaj yeem tsim cov hydrogen bonds.

Protic Solvents
Cov kuab tshuaj protic yog tsim los ntawm cov molecules uas tuaj yeem ua raws li hydrogen-bond pub. Cawv, dej, thiab carboxylic acids yog ib co piv txwv ntawm protic kuab tshuaj. Polar protic kuab tshuaj yog cov tebchaw nrog cov qauv ROH. Lub polarity ntawm polar protic kuab tshuaj yog tshwm sim los ntawm dipole ntawm OH daim ntawv cog lus.

Sab saum toj 3 Cov txiaj ntsig ntawm Solvent Recycling

Cov txiaj ntsig nyiaj txiag
Lub hom phiaj ntawm kev rov ua dua tshiab thiab rov ua dua tshiab yog los pab cov chaw ua kom tiav ob lub hom phiaj tseem ceeb - txo qis cov nqi siv hluav taws xob pov tseg thiab siv cov kuab tshuaj ntau tshaj plaws los ntawm kev rov qab siv cov kua dej khib nyiab xws li cawv pov tseg, daim pam ntxuav, thiab cov kuab tshuaj ntxuav cov kuab tshuaj - muab cov txiaj ntsig kev lag luam loj. Nrog rau kev lag luam tsis ntev los no, tus nqi ntawm cov kuab tshuaj tau nce ntxiv ua rau nws nyuaj rau cov lag luam them taus. Maratek's MaraSolve qhov kev pab cuam kho qhov teeb meem no vim nws tso cai rau koj mus yuav koj tus kheej cov kuab tshuaj rov qab.

Cov txiaj ntsig ib puag ncig
Solvent recycling pab ntau yam txiaj ntsig vim nws lub hom phiaj nkaus xwb tsis yog txo cov khoom hnyav. Solvent recycling tseem muaj cov tuam txhab los txo lawv cov kev taw qhia ecological los ntawm kev txo qis pov tseg, kev yuav khoom siv tshuaj lom neeg, thiab kev khaws tshuaj. Thaum koj ua tiav nrog cov kuab tshuaj, nws yog categorized raws li cov pov tseg txaus ntshai. Cov khib nyiab pov tseg puas tsim kev puas tsuaj rau ib puag ncig vim nws qhov nyuaj ntawm kev pov tseg nrog rau nws cov tshuaj lom. Los ntawm kev rov ua dua cov kuab tshuaj, cov tuam txhab txo qis qhov xav tau kev pov tseg thiab txo qis ntawm cov khoom lag luam nkauj xwb.

Txoj Cai Ua Raws Cai
Hauv tebchaws Canada, kev tuav thiab pov tseg cov pov tseg uas muaj kev phom sij yog raug cai hnyav heev. Cov laj thawj tseem ceeb ntawm qhov no yog txhawb kom muaj kev tiv thaiv ib puag ncig thiab ua raws li cov neeg nyob hauv Canadian txoj cai. Peb theem ntawm tsoom fwv uas koom nrog hauv nroog, xeev, thiab txoj cai lij choj tau koom nrog hauv cov txheej txheem ntawm kev tsim cov pov tseg pov tseg pov tseg. Txoj cai no tseem ceeb heev vim nws pab tswj lub xeev noj qab haus huv ntawm ib puag ncig thiab tiv thaiv tib neeg kev noj qab haus huv.

Polarity Order of Commonly Used Solvents

Dej (max) > Formamide > Acetonitrile > Methanol > Ethanol > Propanol > Acetone > Dioxane > Tetrahydrofuran > Methyl ethyl ketone > n-Butanol > Ethyl acetate > Diethyl ether > Isopropyl ether > Dichloromethane > Chlorobone > Ethyl ethyl > Carbon disulfide > Cyclohexane > Hexane > Kerosene (yam tsawg kawg).

Yuav ua li cas xaiv Solvent

Solubility

Cov kuab tshuaj yuav tsum muaj peev xwm yaj cov xav tau los yog sib tov ntawm cov tebchaw. Qee zaum, kev sib xyaw ntawm cov kuab tshuaj yuav tsim nyog kom ua tiav qhov xav tau solubility.

Kev sib haum xeeb

Cov kuab tshuaj yuav tsum tau sib haum nrog rau lwm yam ntawm lub cev, xws li cov tshuaj tiv thaiv hlab ntsha thiab cov catalysts lossis reagents siv.

Kev nyab xeeb

Cov kuab tshuaj yuav tsum tsis muaj tshuaj lom thiab tsis muaj hluav taws xob, thiab yuav tsum muaj lub vapor siab kom txo tau qhov kev pheej hmoo ntawm hluav taws kub lossis tawg.

Environmental Impact

Cov kuab tshuaj yuav tsum muaj kev cuam tshuam ib puag ncig tsawg thiab yuav tsum tau yooj yim recyclable los yog biodegradable.

Nqi

Cov kuab tshuaj yuav tsum tau them nqi thiab yooj yim muaj.

Solvent properties

Solubility
Dissolving fais fab yog hais txog lub peev xwm ntawm cov kuab tshuaj rau yaj thiab disperse zaj duab xis-forming tshuaj, thiaj li hais tias cov zaj duab xis-forming tshuaj muaj peev xwm yuav sib npaug zos dispersed nyob rau hauv cov kuab tshuaj los tsim ib tug ruaj khov tshuaj. Lub solubility ntawm cov kuab tshuaj muaj feem xyuam rau hom txheej zaj duab xis qub; txoj cai ntawm kev sib cais yog tias cov polar resins xav tau cov kuab tshuaj polar (xws li cawv, esters, ketones); non-polar aliphatic hydrocarbons tuaj yeem yaj cov roj txheej (xws li roj-raws li cov kua roj vanish, cov roj alkyds ntev). Yog li ntawd, txhawm rau xaiv cov kuab tshuaj kom raug, koj yuav tsum nkag siab txog hom hnyav uas cuam tshuam rau txhua qhov kev ua yeeb yaj kiab, txwv tsis pub nws yuav ua rau turbidity, nag lossis daus, poob ntawm gloss, thiab txawm tias khawb.

Lub luag hauj lwm ntawm Solvent
Lub luag haujlwm tseem ceeb ntawm cov kuab tshuaj yog yaj thiab dilute cov khoom los yog cov viscosity-viscosity film-forming tshuaj (resins thiab roj) kom lawv tau yooj yim coated rau ntawm qhov chaw ntawm lub workpiece thiab leveled los ua ib tug du, nruam thiab niaj hnub zaj duab xis. Qhov ntau thiab ntau ntawm cov kuab tshuaj mus rau qhov loj, nws txiav txim siab ntau yam khoom ntawm cov kua txheej, xws li viscosity, ziab ceev, toxicity, tsw, flammability, explosiveness, thiab lwm yam.; cov kuab tshuaj yuav tsum tau ua tib zoo xaiv thiab tsim.

Solvent evaporation tus nqi
evaporation rate yog hais txog tus nqi uas hnyav evaporates los ntawm txheej rau hauv huab cua. Nws txiav txim siab ntev npaum li cas cov txheej txheem tseem nyob hauv cov kua dej. Muaj ntau yam uas cuam tshuam rau tus nqi evaporation ntawm cov kuab tshuaj, qhov tseem ceeb tshaj plaws yog qhov kub ntawm qhov hnyav. Tus nqi ntawm cov kuab tshuaj evaporation yog roughly proportional rau lub boiling point ntawm qhov hnyav.

Txoj hauv kev zoo los khaws cov kuab tshuaj

Sau tag nrho cov kuab tshuaj kom meej. suav nrog cov npe tshuaj, qeb phom sij (flammable, toxic, thiab lwm yam) thiab hnub tau txais.

Siv kev tiv thaiv nchuav. Siv cov spill trays kom muaj cov dej ntws los yog nchuav.

Xyuas kom tseeb tias koj qhov chaw cia yog qhov cua kom zoo. Siv cov ventilated txee los khaws cov khoom tsis zoo thiab muaj ntxhiab tsw. Yog tias qhov no ua tsis tau, muab lawv tso rau hauv ib lub thawv thib ob thiab qhib tsuas yog hauv lub fume cupboard. Tsis txhob siv fume hoods rau lub sij hawm ntev chemical solvent cia.

Khaws cov kuab tshuaj flammable kom zoo. Siv cov khoom siv hluav taws kub-resistant hlau pom zoo rau cov kua dej uas muaj nplaim taws. Tsis txhob khaws cia ze qhov chaw ntawm tshav kub lossis nplaim taws. Yog tias koj khaws cia me me ntawm cov khoom siv hluav taws xob, nrog rau koj txoj cai tua hluav taws los txiav txim siab txwv kev qhib cov tshuaj tua hluav taws. Yog tias lub tub yees txias, xyuas kom lub tub yees koj siv yog cov khoom pov thawj.

Segregate cov ntaub ntawv tsis sib xws. Qhia cov neeg ua haujlwm txog kev sib cuam tshuam tshuaj lom neeg, thiab tsis txhob khaws cov ntaub ntawv uas tuaj yeem tsim cov tshuaj tiv thaiv txaus ntshai nyob ze ib leeg.

Tsis txhob khaws cov khoom tsim kev puas tsuaj. Txiav txim tsuas yog yam koj tuaj yeem siv rau lub sijhawm tsim nyog; tsis txhob khaws cov khoom siv hluav taws xob ntau heev.

Tshem tawm cov tshuaj phem uas koj tsis xav tau. Nco ntsoov siv cov txheej txheem pov tseg kom raug.

Muab cov ntim ntim kom nruj. Qhov no yuav tiv thaiv pliaj nchuav thiab evaporation.

Tsis txhob khaws cov tshuaj hnyav nrog zaub mov. Siv cov txee cais, txee thiab tub yees rau kev khaws tshuaj.

Siv cov cuab yeej tiv thaiv tus kheej. Cov neeg ua haujlwm tuav cov kuab tshuaj yuav tsum hnav qhov muag tiv thaiv, hnab looj tes, tshuaj aprons thiab khau kaw-toe. Cov tshuab ua pa kuj yog ib lub tswv yim zoo uas tsim nyog.

Kev ceev faj rau kev siv cov kuab tshuaj

Equilibrium Issues of Solvents
Raws li cov kuab tshuaj rau cov khoom tsis haum, cov xim muaj ntau yam yuav tsum tau ua: Rau cov xim solubility Yuav tsum tau solubility zoo thiab kev sib nrig sib solubility ntawm tag nrho cov tsis volatile Cheebtsam nyob rau hauv cov xim, muaj zog muaj peev xwm los txo viscosity Force. Thaum lub sij hawm volatilization txheej txheem, yuav tsum tsis muaj tshwm sim ntawm insoluble zaj duab xis tsim tshuaj.

Rau evaporation tus nqi ntawm cov kuab tshuaj
Lub volatilization tus nqi ntawm cov kuab tshuaj yuav tsum tau uniformly txo nrog rau qhuav ntawm cov xim zaj duab xis, thiab yuav tsum tsis txhob yuav ntau dhau los yog tsawg heev los ua kom cov xim zaj duab xis qhuav Lub viscosity yuav tsum maj mam nce thiab yuav tsum tsis txhob tam sim ntawd thicken, uas yuav ua rau nto ntawm pathology. xim zaj duab xis.

Rau qhov Solvent nws tus kheej
Xav tau lub teeb xim, pob tshab, cov khoom siv tshuaj ruaj khov, tsis muaj qhov khaus lossis tsis hnov tsw, tsis muaj tshuaj lom, muaj kev nyab xeeb siab, thiab tus nqi pheej yig tsim nyog, nrog ntau qhov chaw thiab khoom siv yooj yim.

Peb lub Hoobkas

Chemintel yog lub tuam txhab tshuaj uas tshwj xeeb hauv kev ua haujlwm ntawm cov tshuaj muaj txiaj ntsig zoo, kev txhawb nqa thiab txhawb kev pabcuam ntawm cov neeg siv khoom. nws tau cog lus los xaiv cov tshuaj sib tw tshaj plaws uas tsim los ntawm cov khoom lag luam zoo thiab ruaj khov los ntawm Tuam Tshoj los muab kev pabcuam rau cov neeg siv khoom thoob ntiaj teb. Txog tam sim no, chemintel tau tshaj tawm ntau dua 100 cov tshuaj, uas ntau tshaj 20 muaj txoj cai tshwj xeeb rau kev lag luam thoob ntiaj teb thiab kev lag luam suav. peb cov khoom muaj daim ntawv thov nyob rau hauv lub teb ntawm pharmaceuticals & zoo tshuaj, tshuaj tua kab, dyes, flavors thiab fragrances, pub additives, ntsuab fibers & lwm yam.

Txog tam sim no, Chemintchemical lub tuam txhab uas tshwj xeeb hauv kev ua haujlwm ntawm cov tshuaj zoo, kev txhawb nqa thiab txhawb kev pabcuam ntawm cov neeg siv khoom. nws tau cog lus los xaiv cov tshuaj sib tw tshaj plaws uas tsim los ntawm cov khoom lag luam zoo thiab ruaj khov los ntawm Tuam Tshoj los muab kev pabcuam rau cov neeg siv khoom thoob ntiaj teb. Txog tam sim no, chemintel tau tshaj tawm ntau dua 100 cov tshuaj, uas ntau tshaj 20 muaj txoj cai tshwj xeeb rau kev lag luam thoob ntiaj teb thiab kev lag luam suav. peb cov khoom muaj daim ntawv thov nyob rau hauv lub teb ntawm pharmaceuticals & zoo tshuaj, tshuaj tua kab, dyes, flavors thiab fragrances, pub additives, ntsuab fibers & lwm yam.

FAQ

Q: Ua li cas koj thiaj paub yog tias cov kuab tshuaj haum?

A: Feem ntau nws xav tau yog tias cov kuab tshuaj tsis muaj tshuaj lom thiab tsis tawg. Hmoov tsis zoo, ob peb cov kuab tshuaj tau paub tias ua tau raws li ob txoj hauv kev... Qee cov kuab tshuaj tsis muaj tshuaj lom tab sis flammable (xws li, diethyl ether, hydrocarbons--petroleum ether, hexanes). Qee qhov tsis yog nplaim taws tab sis muaj kuab lom (xws li dichloromethane, chloroform).

Q: Dab tsi ua rau ib yam khoom hnyav dua?

A: Polar protic cov kuab tshuaj tuaj yeem tsim cov ntawv cog lus hydrogen nrog dej kom yaj hauv dej thiab yog qhov zoo tshaj plaws rau dissolving polar reactants xws li ions. Cov kuab tshuaj nonpolar tsis muaj peev xwm ua kom muaj zog hydrogen bonds thiab siv tau zoo dua rau kev ua kom cov tsis muaj polar reactants xws li hydrocarbons.

Q: Dab tsi yuav tsum tau ceev faj thaum siv cov kuab tshuaj?

A: tiv thaiv cov kuab tshuaj tsis tsim nyog evaporation los ntawm kev siv qhov tsawg kawg nkaus rau txoj haujlwm - khaws cov hau ntawm cov thawv thiab siv cov ntim ntim ntim rau cov kuab tshuaj-kua pov tseg. Tsis txhob tso cov kuab tshuaj uas muaj kab mob rags pw ib ncig. Tsis txhob siv cov kuab tshuaj kom tshem tawm cov xim, roj thiab lwm yam ntawm koj cov tawv nqaij.Qhov kev txiav txim siab feem ntau ntawm miscibility yog los ntawm kev ntsuam xyuas qhov muag. Yog hais tias ob yam khoom tsim ib txheej, lawv yog immiscible. Ntau txoj hauv kev txiav txim siab muaj xws li chromatographic tsom xam xws li spectroscopy nrog rau viscometry, osmetry, thiab calorimetry.

Q: Vim li cas koj yuav tsum ceev faj thaum xaiv cov kuab tshuaj?

A: Extenuating tej yam kev mob rau solubility
Txawm hais tias siv cov kuab tshuaj tsim nyog, qhov solubility ntawm ib yam khoom tuaj yeem cuam tshuam los ntawm cov kuab tshuaj siv rau crystallization ntawm cov compound, residual hnyav cov ntsiab lus, polymorphism, ntsev piv rau dawb daim ntawv, degree ntawm hydration, hnyav kub, thiab yaj oxygen.

Q: Cov kuab tshuaj cuam tshuam li cas rau solubility?

A: Muaj zog solute-solvent attractions sib npaug rau ntau dua solubility thaum qaug zog solute-solvent attractions sib npaug rau tsawg solubility. Nyob rau hauv lem, polar solutes yuav yaj zoo tshaj plaws nyob rau hauv polar solvents thaum uas tsis yog-polar solutes yuav yaj zoo tshaj plaws nyob rau hauv non-polar solvents.Cov qauv molecular ntawm cov organic hnyav ib txwm muaj ib tug carbon atom thiab ib co muaj hydrogen atoms.

Q: Dab tsi yog qhov phom sij ntawm kev ntxuav nrog cov kuab tshuaj?

A: Cov tshuaj ntxuav cov kuab tshuaj tej zaum yuav muaj ntau yam teeb meem tshwj xeeb uas ua rau muaj ntau yam teeb meem kev noj qab haus huv xws li tawv nqaij khaus, ua tsis taus pa thiab mob qog noj ntshav. Lawv kuj tuaj yeem ua rau muaj kev phom sij rau lub cev xws li kev nyab xeeb hluav taws.

Q: Qhov kev nyab xeeb hnyav yog dab tsi?

A: Siv cov cuab yeej tiv thaiv tus kheej xws li hnab looj tes, tiv thaiv qhov muag, khau khiab, lossis lwm yam teeb meem thaum ua haujlwm nrog cov kuab tshuaj. Xyuas kom tseeb tias txhua yam khoom siv tsim nyog yog muab los ntawm tus tswv haujlwm yog tias nyob hauv chaw ua haujlwm. Nco ntsoov tias chav tsev muaj qhov cua kom zoo, tshwj xeeb tshaj yog tias qhov chaw ua haujlwm me me. Dej yog hu ua "universal solvent" vim nws muaj peev xwm ua kom yaj ntau dua li lwm cov kua. Qhov no tseem ceeb heev rau txhua yam muaj sia nyob hauv ntiaj teb. Nws txhais tau hais tias txhua qhov chaw uas dej mus, los ntawm huab cua, hauv av, lossis los ntawm peb lub cev, nws yuav siv cov tshuaj muaj txiaj ntsig, cov zaub mov, thiab cov as-ham.

Q: Cov kuab tshuaj tseem ceeb npaum li cas?

A: Cov kuab tshuaj yog siv feem ntau hauv cov txheej txheem tshuaj lom neeg, tab sis kuj tseem siv rau hauv cov khoom siv tshuaj hauv tsev. Cov kuab tshuaj yog siv nyob rau hauv yuav luag tag nrho cov txheej txheem tsim khoom thiab yog cov khoom ntawm ntau yam khoom tseem ceeb rau niaj hnub ua neej nyob.Lub solubility ntawm ib yam khoom nyob rau hauv lwm yam yog txiav txim los ntawm qhov sib npaug ntawm intermolecular rog ntawm cov kuab tshuaj thiab cov kuab tshuaj, thiab cov entropy hloov uas nrog rau kev daws. Cov yam ntxwv xws li qhov kub thiab txias yuav hloov qhov sib npaug, yog li hloov cov solubility.

Q: Dab tsi yog qhov hnyav ntawm qhov hnyav?

A: Cov kuab tshuaj feem ntau yog cov kua tab sis tuaj yeem yog cov khoom, roj, lossis cov kua dej supercritical. Dej yog ib qho hnyav rau polar molecules, thiab cov kuab tshuaj feem ntau siv los ntawm cov khoom muaj sia; tag nrho cov ions thiab proteins nyob rau hauv ib lub cell yog yaj nyob rau hauv dej nyob rau hauv lub cell.Qhov solubility ntawm cov tshuaj feem ntau nyob ntawm qhov kub thiab txias, nyob rau hauv cov ntaub ntawv ntawm gases, nyob rau hauv lub siab. Lub solubility ntawm feem ntau cov khoom los yog kua solutes nce nrog nce kub.

Q: Dab tsi yog cov yam ntxwv uas yuav ua kom cov txheej txheem tawg sai?

A: Cov yam ntxwv cuam tshuam rau Solubility: Cov yam ntxwv cuam tshuam rau solubility yog kub, qhov chaw saum npoo, siab, thiab nplawm. Kub: Thaum kub nce solubility nce hauv cov khib nyiab. Khoom solute particles yaj sai dua thaum kub dua. Siab: Gaseous tshuaj muaj ntau yam cuam tshuam los ntawm lub siab.

Q: Nws txhais li cas thaum cov kuab tshuaj miscible nrog dej?

A: Miscible solvents yog cov kuab tshuaj uas nyob rau hauv kev sib xyaw ua ke sib xyaw ua ke. Raws li peb paub tias dej yog cov kuab tshuaj universal, nws kuj yog cov kuab tshuaj miscible. Muaj ntau cov kuab tshuaj uas tov nrog dej thiab tsim ib homogeneous tov.

Q: Cov kuab tshuaj yog dab tsi?

A: Cov kuab tshuaj tuaj yeem yog acidic, feem ntau yooj yim, amphoteric (ob leeg), lossis aprotic (tsis yog). Organic compounds siv los ua cov kuab tshuaj muaj xws li cov tshuaj tsw qab thiab lwm yam hydrocarbons, cawv, esters, ethers, ketones, amines, thiab nitrated thiab halogenated hydrocarbons.

Q: Dab tsi yog qhov txawv ntawm cov kuab tshuaj thiab cov kuab tshuaj?

A: Cov kuab tshuaj yog cov khoom uas tau yaj, thaum cov kuab tshuaj yog qhov nruab nrab dissolving. Cov kev daws teeb meem tuaj yeem tsim muaj ntau yam sib txawv thiab cov qauv ntawm cov kuab tshuaj thiab cov kuab tshuaj.Muaj ntau hom tshuaj siv tau los ua cov kuab tshuaj organic, xws li aliphatic hydrocarbons, aromatic hydrocarbons, amines, esters, ethers, ketones, thiab nitrated lossis chlorinated hydrocarbons.

Q: Dab tsi ua rau ob lub kuab tshuaj tsis sib haum?

A: Cov roj thiab dej yog ob lub kua uas tsis tuaj yeem - lawv yuav tsis sib xyaw ua ke. Cov kua dej zoo li tsis muaj zog thaum lub zog ntawm kev nyiam ntawm cov molecules ntawm tib cov kua ntau dua li lub zog ntawm kev nyiam ntawm ob lub kua sib txawv. Dej tsis yog cov kuab tshuaj organic, vim nws tsis muaj cov pa roj carbon atoms. Nws yog polar protic hnyav vim nws cov qauv tshuaj. Nws yog non-toxic thiab tauj dua tshiab.

Q: Vim li cas ob lub kuab tshuaj yuav tsum tsis raug?

A: Nws yog ib qho tseem ceeb uas ob cov kuab tshuaj yog immiscible, vim hais tias tom qab ntawd nws yog ib qho yooj yim los cais lawv ntawm ib leeg. Cov kua dej saum toj kawg nkaus tuaj yeem rub tawm nrog lub raj xa dej, lossis cov txheej hauv qab tuaj yeem ntws tawm ntawm qhov chaw nres tsheb. Cov tebchaw uas yaj hauv ether tau raug cais tawm ntawm cov dej-soluble compounds.

Q: Cov kuab tshuaj twg yog miscible?

A: Ob lub kua uas zoo li sib xyaw ua ke tau hais tias yog miscible. Dej thiab ethanol yog ib qho piv txwv ntawm ib khub ntawm cov kua miscible, vim tias koj tuaj yeem nqa ib qho ethanol thiab sib tov nrog cov dej ntau npaum li cas thiab koj yuav ua tiav nrog cov kua ntshiab, tsis muaj xim zoo li cov uas koj pib nrog.

Q: Dab tsi yog cov kuab tshuaj lom neeg tshaj plaws?

A: Ntawm cov kuab tshuaj txaus ntshai tshaj plaws yog benzene, carbon disulphide thiab carbon tetrachloride. Cov kuab tshuaj tau tawm hauv cov zis thiab tawm hws los yog lawv tuaj yeem nqus tau. Kev ua haujlwm zoo thiab kev cob qhia tuaj yeem pab txo qis kev phom sij.Qhov feem ntau ntawm cov kuab tshuaj yog combustible, uas yog, nyob rau hauv tej yam kev mob txaus vapor yog tsim uas, thaum tov nrog huab cua los yog lwm yam oxidant thiab ignited, yuav hlawv nrog ib tug nplaim taws. Kev tawg nrog kev puas tsuaj loj tuaj yeem tshwm sim tshwj xeeb yog tias cov txheej txheem no tshwm sim hauv qhov chaw kaw.

Q: Puas yog kuab tshuaj flammable?

A: Cov kuab tshuaj no tau lees paub tias yog cov tshuaj tsis muaj zog heev uas tuaj yeem tso tawm cov vapors ntau heev. Thaum qee chav kawm 3 DG tsuas yog kub hnyiab ntawm qee qhov kub, cov kuab tshuaj tsw qab tuaj yeem ua rau hluav taws kub lossis tawg yog tias qhov kub thiab txias qis dua 60 degree.

Q: Cov kuab tshuaj puas yog cov khoom siv phom sij?

A: Ntau cov kuab tshuaj sib xyaws yuav yog cov khib nyiab pov tseg thaum lawv siv, lossis siv tsis tau lawm. Tsis tas li, ntau cov khoom lag luam tshuaj lom neeg yog cov kuab tshuaj thiab suav tias yog cov khoom pov tseg puas tsuaj yog tias lawv tsis siv thaum muab pov tseg.

Q: Puas yog cov kuab tshuaj fumes nce lossis poob?

A: Cov kuab vapors sawv tab sis tsis txhob khiav tawm vim tias lawv nyob hauv lub tshuab los ntawm ib txheej ntawm cov tub yees muab los ntawm cov cua txias. Cov vapor ces condenses nyob rau saum npoo ntawm qhov chaw dissolving cov pa paug.Qhov hnyav muaj ntau lub luag hauj lwm los ua ib qho tshuaj tiv thaiv. Feem ntau, nws dissolves cov reactants. Hauv lub xeev ntawd, cov reactants yog mobile heev. Yog tsis muaj cov kuab tshuaj, cov reactants tej zaum yuav yog cov khib nyiab, los yog kua, lawv yuav tuab heev rau cov molecules txav mus los sai heev; tej zaum lawv yuav zoo li roj.

Tag nrho cov khoom ntawm cov kuab tshuaj ua tau raws li cov qauv zoo thoob ntiaj teb. Xav tias dawb tso kev txiav txim nrog peb cov kws tshaj lij cov kuab tshuaj manufacturers thiab cov muag khoom hauv Suav teb.