HEMC hydroxyethyl methyl cellulose kugadzira maitiro

HEMC hydroxyethyl methyl cellulose kugadzira maitiro

Hydroxyethyl methyl cellulose HEMC inogona kushandiswa se colloidal inodzivirira mumiriri, emulsifier uye inoparadzira nekuda kwekuita kwayo kwepamusoro mumhinduro ine mvura. Mhedzisiro yehydroxyethyl methyl cellulose pane simende zvivakwa. Hydroxyethyl methyl cellulose inonhuhwirira, isinganakidze, isina muchetura chena poda inonyungudika mumvura inotonhora kuti igadzire inoonekera, inonamira mhinduro. With thickening, adhesion, dispersion, emulsification, film form, suspension, adsorption, gelling, surface activity, water retention and colloid protection, etc. Mhinduro yemvura inogona kushandiswa se colloid inodzivirira, emulsifier uye dispersant nekuda kwekushanda kwayo kwepamusoro. Hydroxyethyl methyl cellulose aqueous solution ine yakanaka hydrophilicity uye inoshanda inochengetedza mvura.

HEMCkugadzirwa

Iyo yakagadzirwa inoburitsa nzira yekugadzirira yehydroxyethyl methyl cellulose, inoshandisa donje rakanatswa seyakagadzirwa uye ethylene oxide se etherifying agent kugadzirira hydroxyethyl methyl cellulose. Zvigadzirwa zvekugadzira hydroxyethyl methyl cellulose nehuremu ndezvi: toluene uye isopropanol musanganiswa 700 ~ 800 zvikamu se solvent, 30 ~ 40 zvikamu zvemvura, sodium hydroxide 70 ~ 80 zvikamu, donje rakanatswa 80 ~ 85 zvikamu, ethylene oxide 20 ~ 28 zvikamu, methane chloride 80 ~ 90 zvikamu, glacial acetic acid 16 ~ 19 zvikamu; Matanho chaiwo ndeaya anotevera:

Danho rekutanga nderekuwedzera toluene uye isopropyl doro musanganiswa, mvura, uye sodium hydroxide mukuita kettle, kupisa kusvika 60 ~ 80 ℃, tora 20 ~ 40 maminetsi;

Danho rechipiri, alkalization: zvinhu zvakanyoroveswa kusvika 30 ~ 50 ℃, donje rakanatswa, toluene uye isopropyl doro musanganiswa solvent spray, vacuum kusvika - 0.006mpa, yakazadzwa nenitrogen kwekatatu kutsiva, kutsiva alkalization, alkalization mamiriro: alkalization nguva. iri 2 maawa, alkalization tembiricha iri 30 ℃-50 ℃;

Danho rechitatu, etherification: mushure me alkalization, reactor yakavharwa kusvika 0.05-0.07mpa, uye ethylene oxide uye methane chloride yakawedzerwa kwemaminitsi makumi matatu-50. Danho rekutanga etherification: 40 ~ 60 ℃, 1.0 ~ 2.0Hour, kumanikidzwa kunodzorwa pakati pe0.15 0.3mpa; Chikamu chechipiri che etherification: 60 ~ 90 ℃, 2.0 ~ 2.5 maawa, kudzora kudzvinyirira pakati pe 0.4- 0.8mpa;

Danho rechina, neutralization: wedzera kuyerwa glacial acetic acid mu desolvation reactor in advance, press into etherized for neutralization, tembiricha inokwira kusvika 75 ~ 80 ℃ yekuparara, tembiricha inokwira kusvika 102 ℃, PH yekuona 6-8 Ndiko kupera. of dissolution; Zadza 90 ℃ ~ 100 ℃ reverse osmosis yakaiswa yakabatwa pombi mvura mu dessolubilization kettle;

Nhanho yechishanu, centrifugal washing: nhanho yechina yezvinyorwa kuburikidza nehorizontal spiral centrifuge centrifugal separation, kupatsanurwa kwezvinhu zvinotamirwa kune pre-yakazadzwa mvura inopisa yekushambidza kettle, kugeza zvinhu;

Nhanho yechitanhatu, centrifugal kuomeswa: zvinhu mushure mekugezwa zvinopinzwa muomesi kuburikidza nehorizontal spiral centrifuge, uye zvinhu zvakawomeswa pa150 ~ 170 ℃. Zvinhu zvakaomeswa zvinopwanyika uye zvakaputirwa.

Kuenzaniswa neiyo iripo yekugadzira tekinoroji ye cellulose ether, iyo yakagadzirwa inoshandisa ethylene oxide se etherification agent kugadzirira hydroxyethyl methyl cellulose, ine hydroxyethyl boka, ine yakanaka mildew kuramba, yakanaka viscosity kugadzikana uye mildew kuramba kana yakachengetwa kwenguva yakareba. Inogona kushandiswa pachinzvimbo cheimwe cellulose ether.