HEMC hydroxyethyl methyl cellulose kaʻina hana

HEMC hydroxyethyl methyl cellulose kaʻina hana

Hiki ke hoʻohana ʻia ka Hydroxyethyl methyl cellulose HEMC ma ke ʻano he mea pale colloidal, emulsifier a me dispersant ma muli o kāna hana ʻili i loko o ka wai. Ka hopena o ka hydroxyethyl methyl cellulose ma nā waiwai sima. ʻO ka Hydroxyethyl methyl cellulose he pauka keʻokeʻo ʻole, ʻono ʻole, ʻawaʻawa ʻole e hoʻoheheʻe ʻia i loko o ka wai anuanu e hana ai i kahi hopena akaka a paʻa. Me ka mānoanoa, adhesion, dispersion, emulsification, hoʻokumu kiʻiʻoniʻoni, hoʻokuʻu, adsorption, gelling, hana ili, ka mālama ʻana o ka wai a me ka pale colloid, etc. Hiki ke hoʻohana ʻia ka wai e like me ka pale colloid, emulsifier a me ka dispersant ma muli o kāna hana ʻeleʻele. ʻO ka hydroxyethyl methyl cellulose aqueous solution he hydrophilicity maikaʻi a he mea mālama wai kūpono.

HEMChana hana

Hōʻike ka mea hou i kahi ʻano hoʻomākaukau no ka hydroxyethyl methyl cellulose, e hoʻohana ana i ka pulupulu i hoʻomaʻemaʻe ʻia e like me ka mea maka a me ka ethylene oxide ma ke ʻano he etherifying agent e hoʻomākaukau ai i ka hydroxyethyl methyl cellulose. ʻO nā mea waiwai no ka hoʻomākaukau ʻana i ka hydroxyethyl methyl cellulose ma ke kaupaona ʻana: toluene a me ka isopropanol hui ʻia 700 ~ 800 mau ʻāpana e like me ka solvent, 30 ~ 40 ʻāpana wai, sodium hydroxide 70 ~ 80 mau ʻāpana, ka pulupulu hoʻomaʻemaʻe 80 ~ 85 ʻāpana, ethylene oxide 20 ~ 28 ʻāpana, methane chloride 80 ~ 90 ʻāpana, glacial acetic acid 16 ~ 19 ʻāpana; ʻO nā ʻanuʻu kikoʻī penei:

ʻO ka hana mua e hoʻohui i ka toluene a me ka isopropyl waiʻona hui ʻia, ka wai, a me ka sodium hydroxide i loko o ka ipu aniani, wela a hiki i 60 ~ 80 ℃, paʻa no 20 ~ 40 mau minuke;

ʻO ka lua o ka ʻanuʻu, alkalization: ua hoʻoluʻu ʻia ka mea i ka 30 ~ 50 ℃, ka pulupulu i hoʻomaʻemaʻe ʻia, toluene a me ka isopropyl alcohol mixture solvent spray, vacuum i - 0.006mpa, hoʻopiha ʻia me ka nitrogen no 3 mau manawa hoʻololi, hoʻololi i ka alkalization, nā kūlana alkalization: manawa alkalization ʻO 2 mau hola, ʻo ka mahana alkaliization he 30 ℃-50 ℃;

ʻO ke kolu o kaʻanuʻu, etherification: ma hope o ka alkalization, ua vacuumized ka reactor i 0.05-0.07mpa, a me ka ethylene oxide a me ka methane chloride i hoʻohui ʻia no 30-50 mau minuke. ʻO ka pae mua o ka etherification: 40 ~ 60 ℃, 1.0 ~ 2.0Hour, hoʻomaluʻia ke kaomi ma waena o 0.15 0.3mpa; ʻO ka lua o ka pae o ka etherification: 60 ~ 90 ℃, 2.0 ~ 2.5 hola, kaomi mana ma waena o 0.4- 0.8mpa;

ʻO ka hā o ka hana, neutralization: e hoʻohui i ka waika acetic glacial i ana i ka reactor desolvation ma mua, e kaomi i ka mea etherized no ka neutralization, piʻi ka mahana i 75 ~ 80 ℃ no ka desolvation, piʻi ka mahana i 102 ℃, ʻike PH 6-8 ʻO ka pau ʻana o ka hemo ana; Hoʻopiha i ka 90 ℃ ~ 100 ℃ reverse osmosis i hoʻokomo ʻia i ka wai paila i mālama ʻia i loko o ka ipu dessolubilization;

ʻO ka lima o ka ʻanuʻu, holoi centrifugal: ʻo ka ʻehā o ka ʻanuʻu o ka mea ma o ka hoʻokaʻawale ʻana i ka centrifuge centrifuge, ka hoʻokaʻawale ʻana o nā mea i hoʻoili ʻia i ka ipu holoi holoi wai wela, holoi mea;

ʻO ke ono o ka ʻanuʻu, ka maloʻo centrifugal: lawe ʻia ka mea ma hope o ka holoi ʻana i loko o ka mea maloʻo ma o ka centrifuge spiral horizontal, a maloʻo ka mea ma 150 ~ 170 ℃. Hoʻopili ʻia ka mea maloʻo a hoʻopaʻa ʻia.

Ke hoʻohālikelike ʻia me ka ʻenehana hana o cellulose ether, ua hoʻohana ka mea hana i ka ethylene oxide ma ke ʻano he etherification agent no ka hoʻomākaukau ʻana i ka hydroxyethyl methyl cellulose, nona ka pūʻulu hydroxyethyl, maikaʻi ke kūpaʻa o ka mildew, ka paʻa viscosity maikaʻi a me ka pale ʻana i ka maʻi ke mālama ʻia no ka manawa lōʻihi. Hiki ke hoʻohana ʻia ma kahi o ka cellulose ether.