Hanyar ruwaye na hydroxypropyl methylcelhin

Gabaɗaya, a cikin syntharisis na hydroxypropyl methylcellulopyl methyllellose, an sake bi da sel auduga da a 35 ° C na daɗaɗɗen digiri na uku a 35 ° C na daɗaɗɗen digiri na uku a cikin 35 ° C na PROTMECIZECE digiri na biyu a cikin kewayon da ake buƙata. Sanya alkaliir na fiber a cikin Ketttle na gaggafa, ƙara propylene oxide da mpyl chloride a cikin bita, kuma exhite ℃ for 5 awoyi zuwa babban matsin lamba na kimanin 1.8 MPa. Sa'an nan kuma ƙara adadin da ya dace na hydrochloric acid da oxalic acid zuwa ruwan zafi a 90 ° C don wanke kayan don faɗaɗa ƙarar don faɗaɗa ƙarar. Dhydrate da centrifuge. Wanke har zuwa tsaka tsaki, lokacin da ruwa abun ciki a cikin kayan ƙasa da 60%, bushe shi da iska mai zafi kwarara a 130 ° C to ƙasa da 5%.
Alkalization: da aka gyara auduga auduga bayan an ƙara budewa a cikin wuraren shakatawa, wanda ke daɗaɗa tare da shigarwar kwayoyin. Alkali da aka yi amfani da shi a cikin alkalization shine ƙarfe hydroxide ko tushen kwayar halitta. Adadin alkali ya kara da (ta Mass, wannan a ƙasa) shine 0.1-0.6 sau da auduga, da kuma adadin ruwan da yake da hankali, da kuma adadin ruwan da yake da hankali; Kamfanin INERT ƙarfi shine cakuda barasa da hydrocarbon, kuma adadin Intervent added ne Reped auduga. 7-15 times: the inert solvent can also be an alcohol with 3-5 carbon atoms (such as alcohol, propanol), acetone. Hakanan yana iya zama alkhairi hydrocarbons da hydrocarbons mai ƙanshi; Yakamata a sarrafa zazzabi a cikin 0-35 ° C a lokacin alkaliation; Lokaci na alkalization shine kusan 1hr. Daidaitawa na zazzabi da lokaci za'a iya ƙaddara gwargwadon bukatun kayan da samfur.
Eratratation: Bayan magani na Alkalization, a ƙarƙashin yanayin wuri, Eritaddri ta hanyar ƙara wakili mai amfani, kuma wakilin extrentate propylene open. Don rage amfani da wakili na Eteryarni, an ƙara wakilin EterThe sau biyu yayin aiwatar da eThatation.