Aplikasi lan Preparation saka Hemc Hydroxyethyl Metylose Hemc

HEMC HYDROXYEHYL methylose bisa digunakake minangka agen pelindung colloid, emulsifier lan nyebar amarga fungsi aktif lumahing ing larutan banyu. Conto aplikasi kasebut kaya ing ngisor iki: Efek selulosa hidroksiethyl methylose ing sifat semen. Hydroxyethylose methylcellulose yaiku ambu ora ana bau, ora enak, bubuk putih nonoxic sing larut ing banyu adhem kanggo mbentuk solusi sing jelas lan viscous. Nduwe sifat-sifat thickening, naleni, nyebar, nggawe film, nggawe film, nggawe adsorbing, kelembapan aktif, lan nglindhungi kolam. Amarga fungsi aktif lumahing solusi banyu, bisa digunakake minangka agen pelindung koloid, emulsifier lan nyebarake. Solusi banyu hidroxyethyl methylose duwe hidrofilisitas sing apik lan agen pelataran banyu sing dhuwur.

nyiyapake
Cara kanggo nyiyapake selulosa selulosa hydroxyethyl metil, metode kasebut kalebu ing katun lan etilena oksida minangka agen Etherxyying kanggo nyiyapake selulosa sing duwe selulosa. Bahan mentah kanggo nyiapake selulosa selulosa kanthi disiapake kanthi bobot: 700-800 bagean katun sodium, 8-28 bagean saka oxethane, 8-2-80 bagean saka metil klorida, lan 16-19 bagean saka metatistik glasium asam; Langkah-langkah tartamtu yaiku:

Langkah pertama, ing reaktor, tambahake toluene lan isoporan lan campuran, banyu, lan sodium hidroksida, dadi pemanasan nganti 60 ~ 80 ℃, diselupake 20 ~ 40 menit;

The second step, alkalization: cool the above materials to 30～50℃, add refined cotton, spray the mixture of toluene and isopropanol with solvent, evacuate to 0.006Mpa, fill with nitrogen for 3 replacements, and carry out alkali after replacement The alkalization conditions are as follows: the alkalization time is 2 hours, and the alkalization temperature is 30°C to 50°C;

Langkah katelu, ethalization: alkalization wis rampung, reaktor kasebut diungsi menyang 0.05 ~ 0,07Mpa, etilena oksida lan metil klorida ditambahake, lan disimpen 30 menit; Panggung pisanan etterifikasi: 40 ~ 60 ℃, 1.0 ~ 2.0 jam, tekanan dikontrol antara 0.150.3MPA; Tahap Ethercial kaping pindho: 60 ~ 90 ℃, 2.0 ~ 2,5 jam, tekanan dikontrol antarane 0,40.8MPA;

Langkah kaping 4, neutralisasi: Tambah asam asetat akal elat sing meteng, penet ing bahan ETERHIPITE kanggo 108 nalika udan deteksi, lan suhu munggah ing banyu sing diisi karo banyu osmosis sing dirawat ing 90 ℃ ~;

Langkah kaping lima, ngumbah centrifugal: Materi ing langkah kaping papat yaiku centrifuged dening centifuge horisontal kanthi ceret cemara sing diisi banyu panas sing diisi banyu panas

Langkah enem, pangatusan sentrifugal: Bahan sing wisuh diangkut menyang pengering liwat centrifuge horisontal, bahan kasebut garing ing 150-140 ° C, lan materi garing.

Compared with the existing cellulose ether production technology, the present invention adopts ethylene oxide as the etherifying agent to prepare hydroxyethyl methyl cellulose, and has good anti-mildew ability because it contains hydroxyethyl group, Good viscosity stability and mildew resistance during long-term storage. Bisa digunakake tinimbang waktu selulose liyane.