HEMC hydroxyethyl methyl cellulose tukanga whakaputa
Ka taea te whakamahi Hydroxyethyl methyl cellulose HEMC hei kaihoko tiaki colloidal, emulsifier me te dispersant na tona mahi mata i roto i te wairewa wai.Te painga o te hydroxyethyl methyl cellulose ki runga i nga taonga ciment.Ko te Hydroxyethyl methyl cellulose he paura ma, he hongi, he kore-paitini ka memeha ki te wai matao hei hanga i tetahi otinga maramara, piri tonu.Ki te thickening, adhesion, dispersion, emulsification, hanganga kiriata, whakatārewatanga, adsorption, gelling, mahi mata, pupuri wai me te tiaki colloid, me ētahi atu Ka taea te whakamahi otinga wai rite protectant colloid, emulsifier me te dispersant no te mea o tona mahi mata.Hydroxyethyl methyl cellulose wairewa wai he hydrophilicity pai, a he pai te tiaki wai.
HEMCtukanga whakaputa
Ka whakaatuhia e te tenenga he tikanga whakarite mo te hydroxyethyl methyl cellulose, e whakamahi ana i te miro para hei rauemi mata me te ethylene oxide hei kaihoko etherifying ki te whakarite hydroxyethyl methyl cellulose.Ko nga rauemi mata mo te whakarite o te hydroxyethyl methyl cellulose ma te taumaha ko: toluene me te ranunga isopropanol 700 ~ 800 nga waahanga hei whakarewa, 30 ~ 40 nga waahanga wai, te konutai waikawa 70 ~ 80 nga waahanga, te miro para 80 ~ 85 nga waahanga, te waikura ethylene 20 ~ 28 nga wahanga, te mewaro chloride 80 ~ 90 nga wahanga, te waikawa acetic glacial 16 ~ 19 nga wahanga;Ko nga taahiraa motuhake e whai ake nei:
Ko te taahiraa tuatahi ko te whakauru i te toluene me te ranunga waipiro isopropyl, te wai, me te konutai waikawa ki roto i te kettle tauhohenga, whakamahana ki te 60 ~ 80 ℃, pupuri mo te 20 ~ 40 meneti;
Ko te taahiraa tuarua, te whakamaaramatanga: ka whakamataohia te rauemi ki te 30 ~ 50 ℃, te miro para, te toluene me te isopropyl waipiro ranunga whakarewa rehu whakarewa, te korehau ki te - 0.006mpa, whakakiia ki te hauota mo te 3 wa whakakapinga, whakakapinga o te whakamaaramatanga, nga tikanga whakamaarama: te wa whakamaarama Ko te 2 haora, ko te 30 ℃-50 ℃ te pāmahana alkaliization;
Ko te tuatoru o nga taahiraa, ko te whakamaaramatanga: i muri i te whakamaaramatanga, ka whakakorehia te reactor ki te 0.05-0.07mpa, ka taapirihia te ethylene oxide me te methane chloride mo te 30-50 meneti.Tuatahi o te etherification: 40 ~ 60 ℃, 1.0 ~ 2.0Hour, te mana te pēhanga i waenganui i 0.15 0.3mpa;Ko te waahanga tuarua o te etherification: 60 ~ 90 ℃, 2.0 ~ 2.5 haora, te mana pehanga i waenga i te 0.4- 0.8mpa;
Ko te wha o nga taahiraa, ko te whakakore: taapirihia te waikawa acetic glacial i whanganga ki te reactor desolvation i mua, pehia ki roto i nga rauemi etherized mo te whakakore, ka piki ake te pāmahana ki te 75 ~ 80 ℃ mo te whakakore, te piki o te pāmahana ki te 102 ℃, te kitenga PH 6-8 Ko te otinga. o te whakakorenga;Whakakiia te 90 ℃ ~ 100 ℃ whakamuri osmosis kua whakauruhia ki roto i te wai paopao kua rongoatia ki roto i te ketere whakakorekore;
Ko te rima o nga taahiraa, te horoinga centrifugal: ko te wha o nga waahanga o te rauemi na roto i te wehenga centrifuge centrifuge whakapae, te wehenga o nga rauemi kua whakawhitia ki te wai wera i mua i te whakakii i te wai wera, te horoinga rauemi;
Ko te taahiraa tuaono, te whakamaroke centrifugal: ko nga mea i muri i te horoinga ka tukuna ki roto i te whakamaroke na roto i te centrifuge torino whakapae, ka whakamarokehia te rauemi ki te 150 ~ 170 ℃.Ko nga mea kua maroke ka kuru, ka takai.
Ina whakaritea ki te hangarau hanga o te cellulose ether, ka whakamahia e te tenenga te ethylene oxide hei kaihoko etherification ki te whakarite i te hydroxyethyl methyl cellulose, kei roto te roopu hydroxyethyl, he pai te aukati koriri, he pai te pumau o te pokey me te aukati koriri ka rongoa mo te wa roa.Ka taea te whakamahi hei utu mo etahi atu ether cellulose.
Wā tuku: Feb-12-2022