Usoro mmepụta HEMC hydroxyethyl methyl cellulose

Usoro mmepụta HEMC hydroxyethyl methyl cellulose

Enwere ike iji Hydroxyethyl methyl cellulose HEMC dị ka onye na-ahụ maka nchebe colloidal, emulsifier na dispersant n'ihi ọrụ elu ya na ngwọta mmiri. Mmetụta nke hydroxyethyl methyl cellulose na njirimara ciment. Hydroxyethyl methyl cellulose bụ ntụ ntụ ọcha na-adịghị na-esi ísì, nke na-adịghị atọ ụtọ, nke na-agbaze n'ime mmiri oyi iji mepụta ngwọta na-apụta ìhè, nke na-adọrọ adọrọ. Na ndim, adhesion, dispersion, emulsification, film e guzobere, nkwusioru, adsorption, gelling, elu ọrụ, mmiri njigide na colloid nchedo, wdg Water ngwọta nwere ike ji mee ihe dị ka colloid protectant, emulsifier na dispersant n'ihi na nke elu-arụ ọrụ ọrụ. Mmiri mmiri hydroxyethyl methyl cellulose nwere hydrophilicity dị mma ma bụrụ onye na-ejigide mmiri nke ọma.

HEMCusoro mmepụta

Ihe mepụtara na-ekpughe usoro nkwadebe maka hydroxyethyl methyl cellulose, nke na-eji owu a nụchara anụcha dị ka akụrụngwa na ethylene oxide dị ka ihe na-eme ka etherifying iji kwado hydroxyethyl methyl cellulose. Ngwa maka nkwadebe nke hydroxyethyl methyl cellulose site na ibu bụ: toluene na isopropanol ngwakọta 700 ~ 800 akụkụ dị ka mgbaze, 30 ~ 40 akụkụ mmiri, sodium hydroxide 70 ~ 80 akụkụ, nụchara anụcha owu 80 ~ 85 akụkụ, ethylene oxide 20 ~ 28 akụkụ, methane chloride 80 ~ 90 akụkụ, glacial acetic acid 16 ~ 19 akụkụ; Usoro ndị a kapịrị ọnụ bụ ndị a:

Nzọụkwụ mbụ bụ ịgbakwunye toluene na isopropyl mmanya ngwakọta, mmiri, na sodium hydroxide na mmeghachi omume kettle, okpomọkụ ruo 60 ~ 80 ℃, jide 20 ~ 40 nkeji;

Nzọụkwụ nke abụọ, alkalization: ihe na-mma na 30 ~ 50 ℃, a nụchara anụcha owu, toluene na isopropyl mmanya ngwakọta ihe mgbaze ịgba, agụụ ka - 0.006mpa, jupụtara nitrogen maka 3 ugboro nnọchi, nnọchi nke alkalization, alkalization ọnọdụ: alkalization oge. bụ 2 awa, alkalization okpomọkụ bụ 30 ℃-50 ℃;

Nzọụkwụ nke atọ, etherification: mgbe alkalization gasịrị, a na-ekpochapụ reactor na 0.05-0.07mpa, na ethylene oxide na methane chloride na-agbakwunye maka nkeji 30-50. Oge mbụ nke etherification: 40 ~ 60 ℃, 1.0 ~ 2.0Hour, a na-achịkwa nrụgide n'etiti 0.15 0.3mpa; Nke abụọ ogbo nke etherification: 60 ~ 90 ℃, 2.0 ~ 2.5 awa, mgbali akara n'etiti 0.4- 0.8mpa;

Nzọụkwụ nke anọ, neutralization: tinye tụrụ glacial acetic acid na desolvation reactor tupu, pịa n'ime etherized ihe maka neutralization, okpomọkụ ịrị elu 75 ~ 80 ℃ maka ịtọgbọrọ n'efu, okpomọkụ ịrị elu 102 ℃, PH nchọpụta 6-8 bụ mmecha. nke mgbasa; Jupụta 90℃ ~ 100℃ reverse osmosis arụnyere na mgbata mmiri mgbata na kettle dessolubilization;

Nzọụkwụ nke ise, centrifugal ịsacha: nzọụkwụ nke anọ nke ihe site na kehoraizin spiral centrifuge centrifugal nkewa, nkewa nke ihe na-ebufe na tupu jupụtara na mmiri ọkụ na-asacha kettle, ihe ịsacha ihe;

Nzọụkwụ nke isii, ihicha centrifugal: a na-ebufe ihe mgbe ịsachara n'ime igwe nkụ site na centrifuge okirikiri kwụ ọtọ, na ihe a na-akpọnwụ na 150 ~ 170 ℃. A na-akụpịa ihe a mịrị amị ma kpokọta ya.

E jiri ya tụnyere teknụzụ mmepụta nke cellulose ether dị ugbu a, ihe mepụtara na-eji ethylene oxide dị ka onye na-ahụ maka etherification iji kwadebe hydroxyethyl methyl cellulose, nke nwere ìgwè hydroxyethyl, nwere nguzogide mildew dị mma, nkwụsi ike viscosity dị mma na iguzogide mildew mgbe echekwara ya ogologo oge. Enwere ike iji ya kama ether cellulose ọzọ.