HEMC hydroxyethyl methyl cellulose samar da tsari

HEMC hydroxyethyl methyl cellulose samar da tsari

Hydroxyethyl methyl cellulose HEMC za a iya amfani da a matsayin colloidal m wakili, emulsifier da dispersant saboda ta surface aiki a cikin ruwa bayani. Tasirin hydroxyethyl methyl cellulose akan kaddarorin siminti. Hydroxyethyl methyl cellulose ba shi da wari, mara ɗanɗano, farin foda mara guba wanda ke narkewa a cikin ruwan sanyi don samar da bayani mai gaskiya, mai ɗaci. Tare da thickening, mannewa, watsawa, emulsification, fim samuwar, dakatarwa, adsorption, gelling, surface aiki, ruwa riƙewa da colloid kariya, da dai sauransu Ruwa bayani za a iya amfani da colloid protectant, emulsifier da dispersant saboda ta surface aiki aiki. Hydroxyethyl methyl cellulose bayani mai ruwa-ruwa yana da kyakkyawan hydrophilicity kuma shine ingantaccen mai riƙe ruwa.

HEMCtsarin samarwa

Ƙirƙirar ta bayyana hanyar shiri don hydroxyethyl methyl cellulose, wanda ke amfani da auduga mai ladabi a matsayin albarkatun kasa da ethylene oxide a matsayin wakili na etherifying don shirya hydroxyethyl methyl cellulose. A raw kayan don shiri na hydroxyethyl methyl cellulose da nauyi ne: toluene da isopropanol cakuda 700 ~ 800 sassa kamar sauran ƙarfi, 30 ~ 40 sassa ruwa, sodium hydroxide 70 ~ 80 sassa, mai ladabi auduga 80 ~ 85 sassa, ethylene oxide 20 ~ 28 sassa, methane chloride 80 ~ 90 sassa, glacial acetic acid 16 ~ 19 sassa; Takamaiman matakan sune kamar haka:

Mataki na farko shine ƙara toluene da cakuda barasa isopropyl, ruwa, da sodium hydroxide a cikin kettle dauki, zafi har zuwa 60 ~ 80 ℃, riƙe 20 ~ 40 mintuna;

Mataki na biyu, alkalization: kayan da aka sanyaya zuwa 30 ~ 50 ℃, mai ladabi auduga, toluene da isopropyl barasa cakuda ƙarfi SPRAY, injin zuwa - 0.006mpa, cike da nitrogen don sau 3 maye gurbin, maye gurbin alkalization, alkalization yanayi: alkalization lokaci: alkalization lokaci. shine 2 hours, alkalization zafin jiki ne 30 ℃-50 ℃;

Mataki na uku, etherification: bayan alkalization, da reactor da aka vacuumized zuwa 0.05-0.07mpa, da kuma ethylene oxide da methane chloride an kara da minti 30-50. Mataki na farko na etherification: 40 ~ 60 ℃, 1.0 ~ 2.0Hour, ana sarrafa matsa lamba tsakanin 0.15 0.3mpa; Mataki na biyu na etherification: 60 ~ 90 ℃, 2.0 ~ 2.5 hours, matsa lamba iko tsakanin 0.4- 0.8mpa;

Mataki na hudu, neutralization: ƙara auna glacial acetic acid a cikin lalata reactor a gaba, latsa cikin etherized abu don neutralization, zafin jiki tashi zuwa 75 ~ 80 ℃ ga halaka, zazzabi Yunƙurin zuwa 102 ℃, PH ganewa 6-8 Shin kammala. na rushewa; Cika 90 ℃ ~ 100 ℃ reverse osmosis shigar da ruwan famfo da aka bi da shi a cikin kettle na rushewa;

Mataki na biyar, centrifugal wanka: mataki na hudu na kayan ta hanyar kwancen karkace centrifuge centrifugal rabuwa, rabuwa da kayan da aka canjawa wuri zuwa kwanon wanka na ruwan zafi da aka riga aka cika, kayan wanka;

Mataki na shida, bushewa na centrifugal: kayan bayan wankewa ana isar da su a cikin na'urar bushewa ta hanyar madaidaiciyar karkace, kuma an bushe kayan a 150 ~ 170 ℃. An murƙushe busassun kayan da aka shirya.

Idan aka kwatanta da data kasance samar da fasahar cellulose ether, da sabuwar dabara yana amfani da ethylene oxide a matsayin etherification wakili don shirya hydroxyethyl methyl cellulose, wanda ya ƙunshi hydroxyethyl kungiyar, yana da kyau mildew juriya, mai kyau danko kwanciyar hankali da mildew juriya a lokacin da adana na dogon lokaci. Ana iya amfani dashi maimakon sauran ether cellulose.