Fasahar samarwa da tsari na hydroxypropyl methylcellulose

Auduga mai ladabi-bude-alkalizing-etherifying-neutralizing-rabe-wanke-rabe-rabe,bushewa-buge-bude-bude auduga da aka gama: ana bude auduga mai tacewa don cire karfe, sannan a nika. Auduga mai ladabi da aka niƙa yana cikin nau'i na foda, kuma girman barbashi shine raga 80 da watsawa 100%. In ba haka ba, yana da sauƙin haɓaka tare yayin aiwatar da amsawa kuma rage ƙimar etherification.

Alkaki: Sai a zuba audugar da aka tace da ita bayan an bude ta a cikin wani abu mara kyau, sai a kunna ta da alkali da ruwa mai laushi domin ta kumbura ledar audugar da aka tace, wanda hakan zai taimaka wajen shigar da kwayoyin halittar da ke fitar da wuta, da kuma inganta daidaiton halayen da ake samu. . Alkali da aka yi amfani da shi a cikin alkalization shine karfe hydroxide ko tushen kwayoyin halitta. Adadin alkali da aka ƙara (ta taro, iri ɗaya a ƙasa) shine sau 0.1-0.6 na auduga mai ladabi, kuma adadin ruwa mai laushi shine sau 0.3-1.0 na auduga mai ladabi; Ƙunƙarar rashin ƙarfi shine cakuda barasa da hydrocarbon, kuma adadin ƙarancin ƙarancin da aka ƙara shine auduga mai ladabi. 7-15 sau: inert sauran ƙarfi kuma iya zama barasa tare da 3-5 carbon atom (kamar barasa, propanol), acetone. Yana kuma iya zama aliphatic hydrocarbons da aromatic hydrocarbons; ya kamata a sarrafa zafin jiki a cikin 0-35 ° C yayin alkalization; lokacin alkalization yana kusan 1hr. Ana iya ƙayyade daidaitawar zafin jiki da lokaci bisa ga buƙatun kayan da samfur.

Etherification: Bayan jiyya na alkalization, a ƙarƙashin yanayi mara kyau, ana aiwatar da etherification ta hanyar ƙara wani wakili na etherifying, kuma wakilin etherifying shine propylene oxide. Don rage yawan amfani da wakili na etherifying, a cikin tsari na etherification, ana ƙara ma'auni a cikin sau biyu, adadin adadin farko shine sau 1-3.5 na auduga mai ladabi, da jimlar adadin abubuwan tarawa guda biyu. shine sau 1.5-4 na auduga mai ladabi. sau. Bayan ƙara etherifying wakili a karon farko, motsa a zazzabi na ≤30 ° C na 45min-90min, sa'an nan kuma zafi har zuwa 50-100 ° C don etherification, lokacin shine 1-5h, sa'an nan kuma kwantar da hankali zuwa ≤30 °C , Ƙara etherified Jing a karo na biyu da motsawa, lokacin motsawa shine 30-120min, sa'an nan kuma zafi har zuwa ? ? ? Aiwatar da etherification, lokacin shine 1-4h, a wannan lokacin, auduga mai ladabi da wakilin etherifying cikakken amsa don samar da H-HPC.

Pulverization da marufi: busasshen samfurin da aka ƙirƙira na yanzu ana niƙasa kuma ana toshe shi. Girman barbashi na abin da aka tarwatsa da sikeke na abin da aka ƙirƙira shine raga 40 kuma abin da ake watsawa shine 10096, ko kuma gwargwadon buƙatun mai amfani. Sa'an nan shirya shi daga cikin masana'anta.


Lokacin aikawa: Oktoba-13-2022