Kushandiswa uye kugadzirwa kwehydroxyethyl methyl cellulose HEMC

Hydroxyethyl methyl cellulose HEMCinogona kushandiswa semushonga unodzivirira colloid, emulsifier uye dispersant nekuda kwebasa rayo pamusoro pemvura mumushonga wemvura. Muenzaniso wekushandiswa kwayo ndewekuti: Mhedzisiro yehydroxyethyl methyl cellulose pahunhu hwesimende. Hydroxyethyl methylcellulose ipfu chena isina hwema, isina kunaka, isina chepfu inonyunguduka mumvura inotonhora kuti igadzire mhinduro yakajeka, ine viscous. Ine hunhu hwekukora, kusunga, kuparadzira, emulsifying, kugadzira firimu, kumisa, kunyudza, gelling, surface-active, kuchengetedza hunyoro uye kuchengetedza colloids. Nekuda kwebasa remvura rinoita pamusoro pemvura, inogona kushandiswa semushonga unodzivirira colloid, emulsifier uye dispersant. Hydroxyethyl methyl cellulose aqueous solution ine hydrophilicity yakanaka uye inoshanda zvakanyanya kuchengetedza mvura.
gadzirira
Nzira yekugadzira hydroxyethyl methyl cellulose inosanganisira kushandisa donje rakanatswa sechinhu chisina kugadzirwa uye ethylene oxide sechinhu chinopa simba rekupisa.hydroxyethyl methyl celluloseZvinhu zvekugadzira hydroxyethyl methyl cellulose zvinogadzirwa muzvikamu zvichienderana nehuremu: zvikamu 700-800 zvemusanganiswa we toluene ne isopropanol se solvent, zvikamu 30-40 zvemvura, zvikamu 70-80 zve sodium hydroxide, zvikamu 80-85 zvedonje rakanatswa, zvikamu 20-28 zve oxyethane, zvikamu 80-90 zve methyl chloride, uye zvikamu 16-19 zve glacial acetic acid; matanho chaiwo ndeaya:

Danho rekutanga, mu reactor, wedzera musanganiswa we toluene ne isopropanol, mvura, uye sodium hydroxide, dziya kusvika 60 ~ 80 ℃, dzikamiswa kwemaminitsi 20 ~ 40;

Danho rechipiri, alkalizing: tonhodza zvinhu zvataurwa pamusoro apa kusvika pa30 ～50 ℃, wedzera donje rakacheneswa, pfapfaidza musanganiswa wetoluene neisopropanol ne solvent, bvisa kusvika pa0.006Mpa, zadza ne nitrogen kuti utsive katatu, uye bvisa alkali mushure mekutsiva. Mamiriro ealkalizing ndeaya anotevera: nguva yealkalizing maawa maviri, uye tembiricha yealkalizing iri 30°C kusvika 50°C;

Danho rechitatu, etherification: alkaliization yapera, reactor inobviswa kuenda ku0.05~0.07MPa, ethylene oxide nemethyl chloride zvinowedzerwa, uye zvinochengetwa kwemaminitsi makumi matatu kusvika makumi mashanu; danho rekutanga re etherification: 40~60℃, 1.0~2.0 awa, kumanikidzwa kunodzorwa pakati pe0.150.3Mpa; danho rechipiri re etherification: 60~90℃, 2.0~2.5 maawa, kumanikidzwa kunodzorwa pakati pe0.40.8Mpa;

Danho rechina, kudzikamisa: wedzera glacial acetic acid yakayerwa pachine nguva mukettle yekudzikamisa mvura, dzvanya muzvinhu zvakanyungudutswa kuti zvidzikamise mvura, pisa 75 ~ 80 ℃ kuti mvura ibude, tembiricha inokwira kusvika 102 ℃, uye pH inoonekwa i68 Kana mvura yapera, tangi yekudzikamisa mvura inozadzwa nemvura yepombi inogadziriswa ne reverse osmosis device pa90 ℃ ~ 100 ℃;

Danho rechishanu, kugeza uchishandisa centrifugal: chinhu chiri mudanho rechina chinoiswa centrifuge ne centrifuge yakatambanudzwa, uye chinhu chakaparadzaniswa chinoiswa muketero yekugezesa yakazadzwa nemvura inopisa pachine nguva, uye chinhu chacho chinogezwa;

Danho rechitanhatu, kuomesa uchishandisa centrifugal: zvinhu zvakagezwa zvinoendeswa mudryer kuburikidza ne centrifuge yakatambanudzwa, zvinhu zvinoomeswa pa 150-170°C, uye zvinhu zvakaomeswa zvinokuyiwa uye zvinorongedzwa.

Zvichienzaniswa nezviripoether ye celluloseNehunyanzvi hwekugadzira, chigadzirwa ichi chinoshandisa ethylene oxide semushonga wekupisa kugadzirira hydroxyethyl methyl cellulose, uye ine kugona kwakanaka kwekudzivirira ganda kubva mukuoma nekuti ine boka rehydroxyethyl, Kugadzikana kwakanaka kweviscosity uye kuramba ganda rekuoma panguva yekuchengetwa kwenguva refu. Inogona kushandiswa panzvimbo pemamwe ma ether e cellulose.