Txoj kev tsim cov propionic acid los ntawm cov khoom seem ntawm acetic acid ua haujlwm li cas?
Propionic Acid tau pib tsim los ntawm kev fermentation ntawm qab zib lossis hmoov txhuv nplej siab, lossis los ntawm kev sib cais thaum lub sijhawm carbonization ntoo lossis distillation qhuav. Txawm li cas los xij, fermentation rau propionic acid ntau lawm yog ib txoj hauv kev nyuaj hauv kev zom zaub mov. Propionibacteria tsim cov propionic acid raug txwv los ntawm cov khoom kawg, ua rau nws nyuaj rau kev sib sau ua ke ntau ntawm cov khoom. Tsis tas li ntawd, kev sib cais cov khoom yog qhov nyuaj, ua rau cov txheej txheem fermentation tsis sib tw piv rau kev tsim tshuaj lom neeg.
Kev oxidation ncaj qha ntawm cov hydrocarbons yog ib txoj hauv kev tseem ceeb rau kev tsim cov acetic acid. Siv cov naphtha sib zog, cov roj av liquefied, lossis alkanes nrog cov ntsiab lus kub hauv qab qee qhov kub ua cov khoom siv raw, thiab manganese, cobalt, lossis vanadium oxides ua cov catalysts, cov kua-theem huab cua oxidation yog ua tiav ntawm 150–250 ° C thiab 1.0–5.0 MPa los tsim cov acetic acid, nrog rau cov khoom by-products suav nrog formic acid thiab propionic acid. Ib tuj ntawm cov hydrocarbon sib zog, 0.65 tons ntawm acetic acid, 0.06 tons ntawm formic acid, thiab 0.05 tons ntawm propionic acid tuaj yeem tsim tau. Cov txheej txheem no siv cov khoom siv raw pheej yig thiab muaj cov txheej txheem yooj yim, tab sis cov khoom sib xyaw ua ke ntawm cov tshuaj sib xyaw ua rau xav tau kev rho tawm thiab azeotropic distillation rau kev sib cais thiab kev ntxuav, ua rau muaj kev nqis peev siab.