Dab tsi yog cov tshuaj lom neeg yooj yim?
Cov tshuaj muaj nyob txhua qhov chaw hauv peb lub neej niaj hnub, los ntawm cov khoom noj uas peb noj mus rau cov khoom uas peb siv los ntxuav thiab tu tus kheej. Qhov tseeb, lub ntiaj teb no khiav ntawm cov tshuaj, raws li lawv yog lub tsev blocks ntawm yuav luag txhua yam peb paub.
Tab sis dab tsi raws nraim yog suav tias yog cov tshuaj lom neeg yooj yim? Cia peb tshawb nrhiav lo lus nug no kom tob.
Defining Basic Chemical
Cov tshuaj yooj yim yog lub hauv paus tsev thaiv ntawm txhua yam tshuaj sib txawv uas peb siv hauv peb lub neej txhua hnub. Lawv yog cov purest daim ntawv ntawm ib tug tshuaj thiab feem ntau yog tsim nyob rau hauv loj teev.
Cov tshuaj yooj yim tuaj yeem raug cais ntxiv ua cov tshuaj organic lossis inorganic. Organic chemicals muaj cov pa roj carbon thiab hydrogen atoms, thaum cov tshuaj inorganic tsis muaj. Piv txwv ntawm cov tshuaj organic muaj xws li ethanol, acetic acid, thiab methanol, thaum piv txwv ntawm cov tshuaj inorganic muaj xws li sodium chloride (lub rooj ntsev), ammonia, thiab sulfuric acid.
Qhov tseem ceeb ntawm Basic Chemicals
Cov tshuaj yooj yim ua lub luag haujlwm tseem ceeb hauv ntau yam kev lag luam, suav nrog tshuaj, kev ua liaj ua teb, petrochemicals, thiab kev tsim khoom. Lawv kuj tseem ceeb heev rau kev tsim khoom ntawm ntau cov neeg siv khoom, xws li plastics, textiles, thiab detergents.
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm cov tshuaj lom neeg yooj yim yog lawv cov versatility. Lawv tuaj yeem hloov mus rau ntau yam khoom siv nrog cov khoom sib txawv thiab kev siv. Qhov kev hloov pauv no ua rau lawv muaj qhov tseem ceeb hauv ntau cov txheej txheem kev lag luam.
Ntxiv mus, cov tshuaj yooj yim feem ntau yog siv los ua cov khoom pib rau kev sib txuas ntawm cov tshuaj complex. Piv txwv li, ethylene, uas yog ib qho yooj yim chemical derived los ntawm natural gas, yog siv los tsim polyethylene, ib yam ntawm cov feem ntau hom yas.
Hom Tshuaj Chemical
Muaj ntau hom tshuaj lom neeg yooj yim, uas yog tsim los ntawm cov nplai loj. Nov yog qee yam ntawm cov hom tshuaj yooj yim tshaj plaws:
1. Cov kua qaub: Cov kua qaub yog cov tshuaj uas muaj pH tsawg dua 7. Lawv tuaj yeem ua cov organic lossis inorganic thiab siv rau ntau hom kev lag luam thiab hauv tsev. Piv txwv ntawm cov kua qaub muaj xws li hydrochloric acid, sulfuric acid, thiab acetic acid.
2. Alkalis: Alkalis yog cov tshuaj uas muaj pH tus nqi siab tshaj 7. Lawv yog siv los ua kom tsis muaj kua qaub thiab tuaj yeem pom muaj nyob rau hauv ntau yam khoom siv hauv tsev, xws li cov tshuaj ntxuav tes thiab cov tshuaj ntxuav tes. Piv txwv ntawm alkalis muaj xws li sodium hydroxide, potassium hydroxide, thiab calcium hydroxide.
3. Cawv: Cawv yog cov tshuaj organic uas muaj ib lossis ntau dua hydroxyl (-OH) pawg. Lawv siv los ua cov kuab tshuaj, roj, thiab tshuaj tua kab mob. Piv txwv ntawm cawv muaj xws li ethanol, methanol, thiab butanol.
4. Aromatics: Aromatics yog cov tshuaj organic uas muaj lub nplhaib benzene. Lawv yog siv nyob rau hauv zus tau tej cov yas, hluavtaws fibers, thiab dyes. Piv txwv ntawm aromatics muaj xws li benzene, toluene, thiab xylene.
5. Halogens: Halogens yog ib pawg ntawm cov khoom uas muaj chlorine, fluorine, bromine, thiab iodine. Lawv yog siv los tsim ntau yam tshuaj, nrog rau cov yas, hluavtaws roj hmab, thiab tshuaj.
6. Polymers: Polymers yog cov molecules loj uas yog tsim los ntawm kev rov ua dua tshiab hu ua monomers. Lawv yog siv los tsim ntau yam khoom, xws li plastics, adhesives, thiab fibers. Piv txwv ntawm polymers muaj xws li polyethylene, polypropylene, thiab PVC.
Kev tsim cov tshuaj lom neeg yooj yim
Cov tshuaj yooj yim feem ntau yog tsim los ntawm cov nplai loj hauv cov nroj tsuag tshuaj. Cov nroj tsuag no siv ntau txoj kev tsim khoom, nyob ntawm seb cov tshuaj tshwj xeeb raug tsim.
Ib txoj hauv kev zoo tshaj plaws siv rau kev tsim cov tshuaj lom neeg yooj yim yog txheej txheem Haber-Bosch, uas yog siv los tsim cov ammonia los ntawm nitrogen thiab hydrogen gas. Cov txheej txheem no suav nrog kev sib txuas cov nitrogen thiab hydrogen nyob rau hauv siab thiab kub nyob rau hauv lub xub ntiag ntawm ib tug catalyst. Lwm txoj hauv kev yog kev sib cuag, uas yog siv los tsim sulfuric acid los ntawm sulfur dioxide.
Ntxiv rau cov txheej txheem no, muaj ntau lwm cov txheej txheem tsim khoom siv los tsim cov tshuaj lom neeg, suav nrog fermentation, distillation, thiab catalysis.
Environmental and Health Impacts of Basic Chemicals
Txawm hais tias cov tshuaj lom neeg tseem ceeb ua lub luag haujlwm tseem ceeb hauv peb lub neej niaj hnub, tseem muaj kev cuam tshuam ib puag ncig thiab kev noj qab haus huv cuam tshuam nrog lawv cov khoom tsim thiab siv.
Ntau yam tshuaj lom neeg muaj kev phom sij rau tib neeg kev noj qab haus huv thiab ib puag ncig. Piv txwv li, raug rau sulfuric acid tuaj yeem ua rau mob hnyav thiab mob ntsws puas tsuaj, thaum raug benzene, uas yog ib feem ntawm ntau cov tshuaj tsw qab, tau txuas rau mob qog noj ntshav.
Tsis tas li ntawd, kev tsim cov tshuaj lom neeg yooj yim feem ntau suav nrog kev siv cov fossil fuels, uas ua rau lub tsev cog khoom emissions thiab kev hloov pauv huab cua. Cov nroj tsuag tshuaj tseem tuaj yeem tsim cov khoom pov tseg ntau thiab tuaj yeem tso cov pa phem rau hauv huab cua thiab dej.
Txhawm rau txo cov kev cuam tshuam no, ntau lub tuam txhab tshuaj tau koom nrog ntau txoj hauv kev tsim khoom kom ruaj khov thiab nqis peev hauv kev tshawb fawb thiab kev tsim kho kom pom kev nyab xeeb dua rau cov tshuaj lom neeg.
Xaus
Cov tshuaj yooj yim yog lub hauv paus tsev thaiv ntawm txhua yam tshuaj sib txawv uas peb siv hauv peb lub neej txhua hnub. Lawv yog tsim nyob rau hauv ib tug loj scale thiab yog ib qho tseem ceeb rau ntau yam kev lag luam thiab cov neeg siv khoom.
Txawm hais tias cov tshuaj lom neeg tseem ceeb ua lub luag haujlwm tseem ceeb hauv peb lub neej niaj hnub, tseem muaj kev cuam tshuam ib puag ncig thiab kev noj qab haus huv cuam tshuam nrog lawv cov khoom tsim thiab siv. Yog li ntawd, nws yog ib qho tseem ceeb uas cov tuam txhab tshuaj lom neeg txuas ntxiv nqis peev rau hauv txoj kev tsim khoom ruaj khov thiab kev tshawb fawb thiab kev tsim kho kom pom kev nyab xeeb dua rau cov tshuaj lom neeg.
