Qhov sib txawv ntawm 1,2-propanediol thiab 1,3-propanediol hauv cov tshuaj pleev ib ce

Propylene glycol yog ib yam khoom uas koj feem ntau pom hauv cov npe khoom xyaw ntawm cov tshuaj pleev ib ce rau kev siv txhua hnub. Qee qhov tau sau tias yog 1,2-propanediol thiab lwm tus yog1,3-propanediol, yog li ntawd qhov txawv yog dab tsi?
1,2-Propylene glycol, CAS No. 57-55-6, mis molecular C3H8O2, yog ib yam tshuaj reagent, sib xyaw nrog dej, ethanol thiab ntau cov organic solvents. Nws yog ib qho kua tsis muaj xim viscous hauv lub xeev ib txwm, yuav luag tsis muaj ntxhiab thiab me ntsis qab zib nrog ntxhiab zoo.
Nws siv tau ua tus neeg sawv cev ntub dej hauv cov tshuaj pleev ib ce, tshuaj txhuam hniav thiab xab npum ua ke nrog glycerin lossis sorbitol. Nws siv tau ua tus neeg sawv cev ntub dej thiab theem hauv cov xim plaub hau thiab ua tus neeg sawv cev tiv thaiv kev khov.
1,3-Propyleneglycol, CAS No. 504-63-2, cov mis molecular yog C3H8O2, yog cov kua tsis muaj xim, tsis muaj ntxhiab, ntsev, hygroscopic viscous, tuaj yeem oxidized, esterified, miscible nrog dej, miscible hauv ethanol, ether.
Nws siv tau rau hauv kev tsim ntau hom tshuaj, polyester PTT tshiab, tshuaj intermediates thiab cov tshuaj antioxidants tshiab. Nws yog cov khoom siv raw rau kev tsim cov polyester unsaturated, plasticizer, surfactant, emulsifier thiab emulsion breaker.
Ob leeg muaj cov mis molecular zoo ib yam thiab yog cov isomers.
1,2-Propylene glycol yog siv los ua tus neeg sawv cev tua kab mob lossis tus neeg txhawb nqa kev nkag mus rau hauv cov tshuaj pleev ib ce ntawm cov concentration siab.
Thaum siv cov tshuaj tsawg dua, feem ntau nws yog siv los ua cov tshuaj moisturizer lossis cov tshuaj ntxuav.
Thaum muaj cov concentration qis dua, nws siv tau ua ib qho pro-solvent rau cov khoom xyaw nquag.
Qhov khaus thiab kev nyab xeeb ntawm daim tawv nqaij ntawm ntau qhov sib txawv yog txawv kiag li.
1,3-Propylene glycol feem ntau yog siv ua cov kuab tshuaj hauv cov tshuaj pleev ib ce. Nws yog cov organic polyol moisturizing solvent uas pab cov khoom xyaw pleev ib ce nkag mus rau hauv daim tawv nqaij.
Nws muaj zog ua kom noo noo ntau dua li glycerin, 1,2-propanediol thiab 1,3-butanediol. Nws tsis nplaum, tsis kub hnyiab, thiab tsis khaus.
Cov txheej txheem tseem ceeb ntawm 1,2-propanediol yog:
1. Txoj kev ua kom propylene oxide hydration;
2. Propylene ncaj qha catalytic oxidation txoj kev;
3. Txoj kev pauv Ester; 4. txoj kev hydrolysis synthesis glycerol.
1,3-Propylene glycol feem ntau yog tsim los ntawm:
1. Txoj kev siv dej Acrolein;
2. Txoj kev siv Ethylene oxide;
3. Txoj kev ua kom cov kua qaub glycerol hydrolysis sib xyaw ua ke;
4. Txoj kev tshawb nrhiav kab mob me me.
1,3-Propylene glycol kim dua li 1,2-Propylene glycol.1,3-Propyleneglycol nyuaj me ntsis rau kev tsim khoom thiab muaj cov txiaj ntsig qis dua, yog li nws tus nqi tseem siab.
Txawm li cas los xij, qee cov ntaub ntawv qhia tau tias 1,3-propanediol tsis khaus thiab tsis xis nyob rau daim tawv nqaij dua li 1,2-propanediol, txawm tias mus txog qib tsis muaj kev tsis xis nyob.
Yog li ntawd, nyob rau xyoo tas los no, qee cov chaw tsim khoom tau hloov 1,2-propanediol nrog 1,3-propanediol hauv cov khoom xyaw kom zoo nkauj kom txo qhov tsis xis nyob uas yuav tshwm sim rau daim tawv nqaij.
Kev tsis xis nyob ntawm daim tawv nqaij los ntawm cov tshuaj pleev ib ce yuav tsis yog los ntawm 1,2-propanediol lossis 1,3-propanediol ib leeg xwb, tab sis kuj tseem yuav los ntawm ntau yam. Thaum tib neeg lub tswv yim ntawm kev noj qab haus huv thiab kev nyab xeeb ntawm cov tshuaj pleev ib ce tob zuj zus, qhov kev thov ntawm kev ua lag luam muaj zog yuav ua rau ntau lub tuam txhab tsim khoom tsim cov khoom zoo dua los ua kom tau raws li qhov xav tau ntawm feem ntau ntawm cov neeg nyiam kev zoo nkauj!