Dab tsi Teeb Propylene Glycol thiab Ethylene Glycol sib nrug
Propylene glycol thiab ethylene glycol yog ob qho tib si yooj yim diols siv los ua cov tshuaj tua kab mob, cov khoom ua kom txias thiab cov kua dej ua haujlwm, tab sis lawv sib txawv hauv cov tshuaj lom neeg, kev ua haujlwm thermal thiab cov ntawv thov uas lawv tau txais. Ethylene glycol yog tshuaj lom rau tib neeg thiab tsiaj txhu thiab tseem yog cov khoom ua haujlwm txias rau kaw kev lag luam thiab tsheb, thaum propylene glycol muaj cov tshuaj lom neeg tsawg thiab raug lees txais rau zaub mov, tshuaj pleev ib ce thiab chaw muag tshuaj hauv ntau lub tebchaws. Kev xaiv ntawm lawv yog li ntawd ib lo lus nug ntawm qhov twg cov kua tuaj yeem xau, tsis yog qhov twg hloov cov cua sov zoo dua.
Ethylene Glycol: Tus Kheej thiab Cov Khoom Tseem Ceeb
Ethylene glycol, tseem hu ua monoethylene glycol (MEG), muaj cov mis mos C2H6O2, molecular hnyav 62.07 g / mol thiab CAS npe 107-21-1. Nws yog ib qho ntshiab, tsis muaj xim, tsis muaj ntxhiab, viscous kua nrog ib tug me ntsis qab zib saj, ib tug ceev ze ntawm 1.11 g / cm³ ntawm 20 degree, ib tug boiling point ntawm 197.3℃thiab ib tug khov point ntawm -12.9℃nyob rau hauv daim ntawv ntshiab. Nws yog tag nrho miscible nrog dej nyob rau hauv tag nrho cov proportions, uas yog dab tsi tso cai rau aqueous glycol coolants rau formulated nyob rau hauv ib tug ntau yam ntawm kev khiav hauj lwm ntau yam. MEG tseem yog ib qho tseem ceeb raw khoom rau polyester thiab PET ntau lawm, qhov uas nws reacts nrog terephthalic acid los tsim polymer chains.
Propylene Glycol: Tus Kheej thiab Cov Khoom Tseem Ceeb
Propylene glycol muaj cov mis mos C3H8O2, molecular hnyav 76.09 g/mol thiab CAS npe 57-55-6. Nws yog xim tsis muaj xim, tsis muaj ntxhiab tsw, dej-miscible kua nrog rau qhov kub ntawm 188.2℃thiab qhov chaw khov nyob ze -59 degree. Nws tsis tshua muaj toxicity ua rau nws siv tau nyob rau hauv cov khoom noj tsw, tshuaj pleev ib ce, tshuaj formulations, cov khoom tu tus kheej thiab aircraft deicing kua, thiab nws kuj yog siv nyob rau hauv lub tshav kub hloov circuits qhov twg cov kua yuav tuaj mus rau hauv kev sib cuag nrog cov zaub mov, dej haus los yog nyob rau hauv cov chaw. Cov qib kev kawm tsis yog npaj rau kev noj ncaj qha txawm tias cov khoom noj thiab cov qib tshuaj ntawm tib chemistry tau tso cai rau hauv cov nqi tswj.
Toxicity, Thaum tshav kub kub hloov pauv thiab cov ntaub ntawv sib piv
| Khoom | Ethylene glycol (CAS 107-21-1) | Propylene glycol (CAS 57-55-6) |
|---|---|---|
| Cov mis mos molecular | C2H6O2 | C3H8O2 |
| Molecular hnyav | 62,07 g / mol | 76,09 g / mol |
| Boiling point | Txog 197.3 degree | Txog 188.2 degree |
| Freezing point (ntshiab) | Txog -12.9 degree | Txog -59 degree |
| Mob toxicity | Siab; Kev noj haus tuaj yeem ua rau metabolic acidosis thiab raum tsis ua haujlwm | Tsawg; lees txais rau cov khoom noj thiab tshuaj siv hauv cov nqi tswj |
| Lub luag haujlwm tseem ceeb | Cav thiab industrial coolant, polyester feedstock | Khoom noj khoom haus-hu rau kev hloov pauv cua sov, deicing, tshuaj pleev ib ce, tshuaj |
Qhov sib txawv ntawm kev nyab xeeb yog qhov kev txiav txim siab sib txawv. Ethylene glycol yog metabolised rau hauv acidic hom uas ua rau metabolic acidosis, central paj hlwb kev nyuaj siab thiab raum puas, yog li cov khoom uas muaj nws yuav tsum tau sau tseg thiab khaws cia deb ntawm cov menyuam yaus thiab tsiaj txhu. Propylene glycol muaj qhov ua rau lub qhov ncauj ntau dua, uas yog vim li cas nws nyiam qhov twg los xij rau hauv cov zaub mov, dej haus lossis chaw nyob. Nyob rau sab thermal, ethylene glycol muaj qis dua viscosity thiab siab dua thermal conductivity, muab kev hloov pauv kom zoo dua ntawm tus nqi txaus; cov tshuab khiav propylene glycol yuav xav tau ntau dua cov khoom siv hluav taws xob, cov khoom siv hluav taws xob loj dua lossis cov twj tso kua mis siab dua me ntsis kom ua tiav cov cua sov tib yam. Ob leeg cov kua dej feem ntau yog muab los ua cov qib inhibited uas muaj cov pob txha tiv thaiv corrosion uas yuav tsum tau sib phim rau cov hlau hauv Circuit Court, xws li tooj liab, tooj dag, hlau lossis txhuas.
Yuav Ua Li Cas Xaiv Ntawm Propylene Glycol thiab Ethylene Glycol
Xaiv cov ethylene glycol rau lub voj voog kaw qhov twg cov kua dej tsis tuaj yeem ncav cuag cov zaub mov, dej haus lossis cov neeg, thiab qhov twg qhov siab tshaj plaws ntawm kev hloov hluav taws xob thiab cov nqi qis dua yog qhov tseem ceeb.
Xaiv cov propylene glycol thaum muaj kev pheej hmoo ntawm kev xau nyob ze ntawm cov khoom noj khoom haus, breweries, cov khoom noj siv mis, tsev kho mob, hnub ci cua sov los yog ib qho chaw nyob.
Paub meej tias CAS tus naj npawb, qhov concentration ntawm cov dej sib tov thiab qhov chaw tiv thaiv khov uas xav tau rau huab cua hauv zos.
Txheeb xyuas cov pob inhibitor tiv thaiv cov hlau hauv lub cev thiab thov kom cov kua dej tu ncua sijhawm thiab khaws cia cov ntaub ntawv alkalinity.
Tshawb xyuas kev sib raug zoo ntawm cov ntsaws ruaj ruaj, gaskets thiab hoses nrog xaiv glycol ua ntej commissioning.
Cov lus nug nquag
Q: Dab tsi yog qhov txawv ntawm propylene glycol thiab ethylene glycol?
Qhov sib txawv tseem ceeb yog toxicity thiab thermal kev ua tau zoo: ethylene glycol yog tshuaj lom tab sis hloov cua sov tau zoo dua, thaum propylene glycol tsis muaj tshuaj lom ntau thiab tau txais rau cov khoom noj thiab tshuaj sib cuag.
Q: CAS tus naj npawb ntawm propylene glycol yog dab tsi?
CAS npe ntawm propylene glycol yog 57-55-6.
Q: CAS tus naj npawb ntawm ethylene glycol yog dab tsi?
CAS npe ntawm ethylene glycol yog 107-21-1, thiab nws tseem hu ua monoethylene glycol.
Q: Vim li cas ethylene glycol yog tshuaj lom?
Nws yog metabolised rau hauv acidic metabolites uas ua rau metabolic acidosis, central paj hlwb kev nyuaj siab thiab raum tsis ua hauj lwm, yog li nws yuav tsum tsis txhob noj.
Q: propylene glycol puas tuaj yeem siv rau hauv daim ntawv thov zaub mov?
Yog lawm. Propylene glycol muaj qhov mob toxicity tsawg thiab tau txais nyob rau hauv cov khoom noj, tshuaj pleev ib ce thiab kev siv tshuaj nyob rau hauv cov nqi tswj, txawm hais tias cov qib kev tsis yog rau kev noj ncaj qha.
Q: Qhov twg glycol muab cov cua sov zoo dua?
Ethylene glycol feem ntau muab cov cua sov zoo dua vim tias nws cov viscosity qis dua thiab cov thermal conductivity ntau dua, thaum propylene glycol raug xaiv qhov chaw nyab xeeb thiab qhov chaw xau tseem ceeb dua.