HEMC hydroxyethyl methyl cellulose habka wax soo saarka

HEMC hydroxyethyl methyl cellulose habka wax soo saarka

Hydroxyethyl methyl cellulose HEMC waxaa loo isticmaali karaa sida wakiilka kolloidal ilaalinta, emulsifier iyo kala firdhiso ay sabab u tahay dhaqdhaqaaqa dusha ee xal aqueous. Saamaynta hydroxyethyl methyl cellulose ee guryaha sibidhka. Hydroxyethyl methyl cellulose waa budo cad oo aan ur lahayn, dhadhamin, aan sun ahayn oo ku milma biyo qabow si ay u sameeyaan xal hufan oo dhegdheg leh. Iyada oo dhumucdiisuna, adhesion, kala firdhiso, emulsification, samaynta filimada, ganaax, adsorption, gelling, dhaqdhaqaaqa dusha, haynta biyaha iyo ilaalinta kolloid, iwm Xalka biyaha waxaa loo isticmaali karaa sida ilaalinta kolloid, emulsifier iyo kala firdhiso sababtoo ah ay dusha shaqada firfircoon. Hydroxyethyl methyl cellulose aqueous aqueous ayaa leh biyo nadiif ah oo wanaagsan waana wakiil biyo celin wax ku ool ah.

HEMChabka wax soo saarka

Hal-abuurku wuxuu daaha ka qaaday habka diyaarinta ee hydroxyethyl methyl cellulose, kaas oo u adeegsada suuf la safeeyey sida walxo ceeriin ah iyo ethylene oxide sida wakiilka etherifying si loogu diyaariyo hydroxyethyl methyl cellulose. Qalabka cayriin ee loogu talagalay diyaarinta hydroxyethyl methyl cellulose miisaanku waa: toluene iyo isku dhafka isopropanol 700 ~ 800 qaybood sida dareeraha, 30 ~ 40 qaybood oo biyo ah, sodium hydroxide 70 ~ 80 qaybood, suuf la safeeyey 80 ~ 85 qaybood, ethylene oxide 20 ~ 28 qaybo, methane chloride 80 ~ 90 qaybood, glacial acetic acid 16 ~ 19 qaybood; Tallaabooyinka gaarka ah waa sida soo socota:

Talaabada ugu horeysa waa in lagu daro toluene iyo isopropyl aalkolada, biyo, iyo sodium hydroxide ee kiliyaha falcelinta, kuleyl ilaa 60 ~ 80 ℃, qabo 20 ~ 40 daqiiqo;

Tallaabada labaad, alkalization: maaddada waxaa la qaboojiyey ilaa 30 ~ 50 ℃, suuf la safeeyey, toluene iyo isopropyl alkohol isku dar ah buufiyo dareere ah, vacuum ilaa - 0.006mpa, ka buuxsamay nitrogen ee 3 jeer beddelka, beddelka alkalization, xaaladaha alkalization: waqtiga alkalization waa 2 saacadood, heerkulka alkalization waa 30 ℃-50 ℃;

Talaabada saddexaad, etherification: alkalization ka dib, reactor-ka ayaa la faaruqiyay ilaa 0.05-0.07mpa, iyo ethylene oxide iyo methane chloride ayaa lagu daray 30-50 daqiiqo. Marxaladda koowaad ee etherification: 40 ~ 60 ℃, 1.0 ~ 2.0Hour, cadaadiska waxaa lagu xakameynayaa inta u dhaxaysa 0.15 0.3mpa; Marxaladda labaad ee etherification: 60 ~ 90 ℃, 2.0 ~ 2.5 saacadood, xakamaynta cadaadiska inta u dhaxaysa 0.4- 0.8mpa;

Talaabada afraad, dhex dhexaadnimada: ku dar glacial acetic acid oo la qiyaasay oo ku jira reactor-ka baabi'inta ka hor, ku cadaadi walxaha etherized ee dhexdhexaadinta, heerkulka kor u kaca ilaa 75 ~ 80 ℃ burburinta, heerkulka kor u kaca ilaa 102 ℃, PH ogaanshaha 6-8 Ma dhammaystirka of kala diri; Buuxi 90 ℃ ~ 100 ℃ ross osmosis oo lagu rakibay biyaha qasabada ee la daweeyay ee kiliyaha dessolubilization;

Tallaabada shanaad, dhaqidda centrifugal: tillaabada afraad ee walxaha iyada oo loo marayo kala-soocidda centrifuge-ka-wareegga ah ee dhexdhexaadka ah, kala-soocidda alaabta loo wareejiyo weelka biyaha kulul ee horay loo buuxiyey, wax lagu dhaqo;

Talaabada lixaad, qalajinta centrifugal: alaabta ka dib markii la dhaqo waxaa loo gudbiyaa qalajiyaha iyada oo loo marayo sentifuge toosan, iyo walxaha waa la qalajiyey at 150 ~ 170 ℃. Qalabka la qalajiyey waa la jajabiyey oo baakadeeyey.

Marka la barbar dhigo tignoolajiyada wax soo saarka ee ether cellulose, ikhtiraacu wuxuu isticmaalaa ethylene oxide sida wakiilka etherification si uu u diyaariyo hydroxyethyl methyl cellulose, kaas oo ka kooban kooxda hydroxyethyl, waxay leedahay caabbinta caariyaysi wanaagsan, xasiloonida viscosity wanaagsan iyo caabbinta caarada marka la kaydiyo wakhti dheer. Waxaa loo isticmaali karaa halkii laga isticmaali lahaa eter cellulose kale.