Esters yog tsim los ntawm condensation cov tshuaj tiv thaiv ntawm ib qho cawv thiab carboxylic acid. Kev siv tseem ceeb ntawm esters yog rau flavorings thiab perfumes, tab sis lawv kuj siv tau nyob rau hauv lub tshuaj lom neeg kev lag luam ua kuab tshuaj. …
Puas esters siv los ua kuab tshuaj?
Qee yam tsis muaj zog esters yog siv los ua cov kuab tshuaj rau lacquers, xim, thiab varnishes; Rau lub hom phiaj no, ntau ntau ntawm ethyl acetate thiab butyl acetate yog ua lag luam. … Cov rog thiab roj yog esters ntawm cov saw ntev carboxylic acids thiab glycerol.
Cov khoom lag luam twg muaj esters?
Esters yog lub luag haujlwm rau cov txiv hmab txiv ntoo ntau yam, suav nrog apples, durians, pears, bananas, pineapples, thiab strawberries. Ob peb billion kilograms ntawm polyesters raug tsim muaj nyob rau hauv ib xyoos ib zaug, cov khoom tseem ceeb yog polyethylene terephthalate, acrylate esters, thiab cellulose acetate.
Vim li cas esters kuab tshuaj?
Esters yog cov tshuaj lom neeg tseem ceeb rau ntau yam kev siv tshuaj thiab kev ua liaj ua teb. Esters uas muaj acetic acid los yog vinegar puag yog hu ua acetates. Lawv tau siv dav los ua cov kuab tshuaj, vim lawv muaj peev xwm ua kom yaj ntau cov roj.
Yuav ua li cas ua cov esters hauv tsev?
Cov esters me me yog tsim sai dua cov loj dua. Txhawm rau ua cov ester me me xws li ethyl ethanoate, koj tuaj yeem maj mam ua kom sov sib xyaw ntawm ethanoic acid thiab ethanol nyob rau hauv muaj cov concentrated sulfuric acid, thiabdistil tawm ntawm ester sai li sai tau thaum nws tsim.
