HEMC hydroxyethyl methyl cellulose kupanga njira

HEMC hydroxyethyl methyl cellulose kupanga njira

Hydroxyethyl methyl cellulose HEMC ingagwiritsidwe ntchito ngati colloidal protective agent, emulsifier ndi dispersant chifukwa cha ntchito yake yapamwamba mu njira yamadzimadzi. Mphamvu ya hydroxyethyl methyl cellulose pa katundu wa simenti. Hydroxyethyl methyl cellulose ndi ufa woyera wopanda fungo, wosakoma, wopanda poizoni womwe umasungunuka m'madzi ozizira kupanga njira yowonekera, yomata. Ndi thickening, adhesion, kubalalitsidwa, emulsification, filimu mapangidwe, kuyimitsidwa, adsorption, gelling, pamwamba ntchito, posungira madzi ndi colloid chitetezo, etc. Njira madzi angagwiritsidwe ntchito ngati colloid chitetezo, emulsifier ndi dispersant chifukwa cha pamwamba yogwira ntchito. Hydroxyethyl methyl cellulose aqueous solution ili ndi hydrophilicity yabwino ndipo ndiyothandiza kusunga madzi.

Mtengo HEMCkupanga ndondomeko

Kupangaku kumawulula njira yokonzekera hydroxyethyl methyl cellulose, yomwe imagwiritsa ntchito thonje woyengedwa ngati zopangira komanso ethylene oxide monga etherifying agent pokonzekera hydroxyethyl methyl cellulose. Zopangira pokonzekera hydroxyethyl methyl cellulose ndi kulemera kwake ndi: toluene ndi isopropanol osakaniza 700 ~ 800 mbali monga zosungunulira, 30 ~ 40 magawo madzi, sodium hydroxide 70 ~ 80 mbali, woyengeka thonje 80 ~ 85 mbali, ethylene okusayidi 20 ~ 28 mbali, methane kolorayidi 80 ~ 90 mbali, glacial acetic asidi 16 ~ 19 mbali; Masitepe enieni ndi awa:

Gawo loyamba ndikuwonjezera toluene ndi isopropyl mowa osakaniza, madzi, ndi sodium hydroxide mu ketulo anachita, kutentha mpaka 60 ~ 80 ℃, gwirani kwa mphindi 20 ~ 40;

Gawo lachiwiri, alkalization: zinthuzo zitakhazikika mpaka 30 ~ 50 ℃, thonje woyengeka, toluene ndi isopropyl mowa osakaniza zosungunulira kutsitsi, zingalowe kuti - 0.006mpa, wodzazidwa nayitrogeni kwa 3 nthawi m'malo, m'malo alkalization, alkalization zinthu: alkalization nthawi. ndi 2 hours, alkalization kutentha ndi 30 ℃-50 ℃;

Gawo lachitatu, etherification: pambuyo alkalization, riyakitala anali vacuumized kuti 0.05-0.07mpa, ndi okusayidi ethylene ndi methane kolorayidi anawonjezera kwa mphindi 30-50. Gawo loyamba la etherification: 40 ~ 60 ℃, 1.0 ~ 2.0Hour, kuthamanga kumayendetsedwa pakati pa 0,15 0.3mpa; Gawo lachiwiri la etherification: 60 ~ 90 ℃, 2.0 ~ 2.5 maola, kuthamanga kwapakati pa 0.4- 0.8mpa;

Gawo lachinayi, neutralization: onjezani kuyeza glacial asidi asidi mu riyakitala chiwonongeko pasadakhale, akanikizire mu etherized zinthu neutralization, kutentha kukwera kwa 75 ~ 80 ℃ kwa chiwonongeko, kutentha kukwera kwa 102 ℃, PH kuzindikira 6-8 Ndi kutha za kuwonongeka; Lembani 90 ℃ ~ 100 ℃ reverse osmosis anaika mankhwala apampopi ketulo dessolubilization;

Gawo lachisanu, kutsuka centrifugal: sitepe yachinayi ya zinthu kudzera yopingasa mzimu centrifuge centrifugal kulekana, kulekana kwa zipangizo anasamutsidwa chisanadze anadzazidwa madzi otentha kutsuka ketulo, zinthu kutsuka;

Gawo lachisanu ndi chimodzi, kuyanika kwapakati: zinthuzo zikatsukidwa zimatumizidwa mu chowumitsira kudzera pa centrifuge yopingasa yozungulira, ndipo zinthuzo zimauma pa 150 ~ 170 ℃. Zouma zouma zimaphwanyidwa ndikuphatikizidwa.

Poyerekeza ndi luso alipo kupanga mapadi efa, kutulukira amagwiritsa okusayidi ethylene monga wothandizila etherification kukonzekera hydroxyethyl methyl mapadi, amene ali hydroxyethyl gulu, ali ndi kukana zabwino mildew, kukhazikika kwa mamasukidwe abwino akayendedwe ndi mildew kukana pamene kusungidwa kwa nthawi yaitali. Itha kugwiritsidwa ntchito m'malo mwa cellulose ether ina.