Propylene oxide, tseem hu ua propylene oxide thiab methyl ethylene oxide, yog ib qho tseem ceeb raw khoom rau cov organic tebchaw thiab yog thib peb loj tshaj plaws propylene derivative tom qab polypropylene thiab acrylonitrile. Propylene oxide yog cov kua tsis muaj xim ether, tsis tshua muaj kub kub thiab kub kub. Nws muaj chirality, thiab cov khoom lag luam feem ntau yog sib xyaw ntawm ob enantiomers. Ib nrab miscible nrog dej, miscible nrog ethanol thiab ether. Nws tsim binary azeotropic sib tov nrog pentane, pentene, cyclopentane, cyclopentene thiab dichloromethane. Toxic, irritating rau mucous daim nyias nyias thiab ntawm daim tawv nqaij, yuav ua rau lub cornea thiab conjunctiva, ua rau mob ua pa, tawv nqaij kub hnyiab thiab o, thiab txawm cov ntaub so ntswg necrosis.
Cov ntaub ntawv yooj yim
CAS Nr .: 75-56-9
PIB: 200-879-2
Molecular Luj: 58.08
Molar hnyav: 58.08 g / molDensity: 0.830 g / cm3 (20 ° C)
Lub sij hawm kev nyab xeeb: S45:;S53:;
Solubility hauv dej: yooj yim soluble (405 g / L, 20 ° C)
Refractive Index (nD): 1.3664 (20 ° C)
Daim ntawv thov
KOH / 4A molecular sieve khoom catalyst nrog kev ua haujlwm siab thiab ruaj khov rau kev sib txuas ntawm dimethyl carbonate los ntawm propylene oxide, carbon dioxide thiab methanol tau tsim thawj zaug. Kev cuam tshuam ntawm cov tshuaj tiv thaiv kub thiab kev thauj khoom ntawm cov catalyst nquag tivthaiv KOH ntawm kev ua haujlwm catalyst tau tshawb xyuas. Raws li kev sim ua kom zoo, propylene oxide tuaj yeem hloov pauv tag nrho, thiab cov txiaj ntsig ntawm dimethyl carbonate yog 168%. Los ntawm cov txiaj ntsig kev sim, nws tau txiav txim siab tias cov khoom dimethyl carbonate yog qhov sib ntxiv ntawm propylene oxide thiab carbon dioxide los tsim carbonic acid Propylene ester yog tom qab ntawd tsim los ntawm cov tshuaj tiv thaiv transesterification nrog methanol. Methanol muaj cov nyhuv catalytic rau kev sib txuas ntawm propylene carbonate los ntawm propylene oxide thiab carbon dioxide.
Propylene oxideyog ua los ntawm polyether polyol; Nws yog tsuas yog siv nyob rau hauv zus tau tej cov propylene glycol thiab ntau yam nonionic surfactants. Cov no suav nrog polyether polyol, polyurethane ua npuas ncauj, insulators; elastomers; Nws yog ib qho tseem ceeb raw khoom hauv kev tsim cov nplaum thiab coatings. Ionic surfactants yog siv hauv cov roj; Tshuaj tua kab; Kev lag luam textile; Nws yog dav siv nyob rau hauv niaj hnub chemistry thiab lwm yam lag luam. Nyob rau tib lub sijhawm, propylene oxide yog ib qho tseem ceeb ntawm cov khoom siv raw.