Cov muaj zus tau tej cov ethylene glycol

Ethylene glycol - yog ib tug me ntsis khov, oily, ntxhiab kua. Nws yog ib co soluble nyob rau hauv alcohols, dej, acetone thiab Turpentine. Ethylene glycol yog lub hauv paus rau tsheb dej ntsuab thiab tsev neeg txij li thaum nws lowers tus Harbor rau lub khov ntawm cov dej thiab aqueous daws teeb meem. Ib tug interesting tseeb yog hais tias txawm lub frozen kua yog tsis kho, xa mus rau hauv cov dej khov, thiab cia li yuav xoob. Tsis tas li ntawd, aqueous lub ntsiab ntawm ethylene glycol tsis nthuav thiab yog li ntawd tsis puas hlab thiab lub radiator nyob rau hauv lub tsheb.

Qhov no cov ntaub ntawv uas muaj siab heev hygroscopic, i.e. absorbs dej los ntawm cov ib puag ncig (huab cua, ntau yam gases). Cov muaj zus tau tej cov ethylene tsim nyob rau ntau cov tshuaj nroj tsuag. Nws yuav tsum tau nco ntsoov tias yam khoom uas tsis yog lom, txawm hais tias nws muaj ib tug Sweet saj. Yog li ntawd, cov sis raug zoo nrog nws yog tsim nyog los noj ceev faj. Officers ntawm tshuaj muaj tsis siab dhau heev lawm toxicity thiab tej zaum yuav suav ib tug txaus ntshai rau kev noj qab nyob tsuas yog nyob rau lawv ntev nqus tau pa. Ethylene glycol - ib tug roj kev twb kev txuas. High ntau ntawm vapor nyob rau hauv cov huab cua yog heev, tab sis nyob rau hauv ib tug sib tov nrog dej, ethylene glycol loses cov khoom.

daim ntawv thov

Ethylene glycol yog siv nyob rau hauv ntau yam teb thiab lag luam: tsheb, tshuaj, aerospace, textile, hluav taws xob, roj thiab cov nkev. Ib tug ntawm cov tseem ceeb tshaj plaws daim ntaub ntawv ntawm cov khoom no yog lub zus tau tej cov coolants thiab dej ntsuab. Vim lub siab thov rau cov muaj zus tau tej cov ethylene tau ua loj. Cov khoom no yuav siv tau raws li ib tug hnyav rau xim khoom.

Txoj kev npaj ethylene glycol

Tus txheej txheem rau qhov kev npaj ntawm cov tshuaj yeeb dej caw heev heev, tab sis rau industrial ntau lawm tsis haum tag nrho cov ntawm lawv. Ib qho ntawm feem nrov txoj kev yog kev npaj ntawm ethylene glycol los ntawm kev siv lub xeem oxidation los ntawm cov pa nyob rau hauv lub xub ntiag ntawm ib tug silver catalyst, ua raws li los ntawm tom ntej co. Txawm li cas los, thov yog tseem lwm cov txheej txheem. Kev npaj ntawm ethylene glycol los ntawm hydrolysis ntawm ethylene. Nyob rau hauv ob qho tib si zaum, qhov kev co tshuaj tiv thaiv ntawm ethylene oxide ua nyob rau hauv lub xub ntiag ntawm catalysts thiab nyob kom kub. Nyob rau hauv cov ntawv nyeem, muaj kuj yog ib txoj kev nyob rau hauv uas qhov kev npaj ntawm ethylene glycol yog nqa tawm los ntawm reacting dej, formaldehyde thiab cov pa roj carbon monoxide. Glycolic acid tau nyob rau hauv thawj kauj ruam yog raug esterification muab ester. Ces, nws yog hydrogenated rau ethylene glycol. Cov txheej txheem no yog siv nyob rau hauv lub tebchaws United States.

Cov uas ua cov khoom no yog kom huv si huv si, vim hais tias txawm me me qhov ntau ntawm lwm kab mob adversely muaj feem xyuam rau nws cov khoom. Piv txwv li, nyob rau hauv lub xub ntiag ntawm ethylene glycol nyob rau hauv nyob tus yeees ntawm tshuaj xws li diethylene glycol thiab polyglycols, nws thermal stability yog significantly txo. Yog li ntawd, high quality khoom feem pua lwm kev sib txuas yuav tsum tau nyoog. Qhov no yog tshwj xeeb tshaj yog muaj tseeb ntawm chlorinated tebchaw thiab aldehydes. Pawg feem ntawm qhov yooj yim compound yuav tsum muaj tsawg kawg yog 99.5%.