Mea Hana Waikawa Stearic Kumukūʻai Maikaʻi CAS: 57-11-4

ʻO ka waikawa Stearic, (papa ʻoihana) ʻO ka waikawa Stearic kekahi o nā waikawa momona lōʻihi nui i loaʻa nā aila a me nā momona. Hōʻike ʻia ia i loko o nā momona holoholona, ​​​​ka aila a me kekahi ʻano aila mea kanu a me ke ʻano o nā glycerides. ʻO kēia mau aila, ma hope o ka hydrolysis, hana i ka waikawa stearic.
ʻO ka waikawa stearic kahi waikawa momona i loaʻa ma ke ʻano a he mau waiwai kemika maʻamau o nā waikawa carboxylic. Loaʻa i ka aneane nā ʻano momona a me ka ʻaila kekahi nui o ka waikawa stearic me ka nui o nā momona holoholona. No ka laʻana, hiki i ka nui o ka pata ke hiki i ka 24% ʻoiai ʻo ka nui o ka ʻaila mea kanu he haʻahaʻa me ka waiwai o ka ʻaila kī he 0.8% a ʻo ka ʻaila ma ka pama he 6%. Eia nō naʻe, hiki i ka nui o ka koko ke hiki i ka 34%.

ʻElua mau ala nui no ka hana ʻana o ka waikawa stearic ma ka ʻoihana, ʻo ia hoʻi ke ʻano fractionation a me ke kaomi ʻana. E hoʻohui i ka mea hoʻoheheʻe i ka ʻaila hydrogenated, a laila hydrolyze e hāʻawi i ka waikawa momona maka, e hele hou ma o ka holoi ʻana me ka wai, distillation, bleaching e loaʻa ai nā huahana i hoʻopau ʻia me ka glycerol ma ke ʻano he byproduct.
Hoʻohana ka hapa nui o nā mea hana kūloko i ka momona holoholona no ka hana ʻana. ʻO kekahi ʻano ʻenehana hana e hopena i ka hoʻopau ʻole ʻia o ka distillation o ka waikawa momona e hana ana i kahi ʻala hoʻoulu i ka wā o ka hana ʻana o ka plastic a me nā mahana kiʻekiʻe. ʻOiai ʻaʻohe ʻawaʻawa o kēia mau ʻala akā e loaʻa iā lākou kahi hopena i nā kūlana hana a me ke kaiapuni kūlohelohe. ʻO ka hapa nui o ke ʻano o ka stearic acid i lawe ʻia mai e lawe i ka ʻaila mea kanu ma ke ʻano he mea maka, ʻoi aku ka holomua o nā kaʻina hana; ʻo ka stearic acid i hana ʻia he hana paʻa, maikaʻi ka waiwai lubrication a emi ka ʻala i ka noi.
Hoʻohana nui ʻia ka waikawa stearic no ka hana ʻana i nā stearates e like me ka sodium stearate, magnesium stearate, calcium stearate, lead stearate, alumini stearate, cadmium stearate, hao stearate, a me ka potassium stearate. ʻO ka paʻakai sodium a potassium paha o ka waikawa stearic ka ʻāpana o ke kopa. ʻOiai ʻoi aku ka liʻiliʻi o ka hiki ke hoʻomaʻemaʻe i ka sodium stearate ma mua o ka sodium palmitate, akā hiki i kona alo ke hoʻonui i ka paʻakikī o ke kopa.
E lawe i ka pata ma ke ʻano he mea maka, e hele i loko o ka waikawa sulfuric a i ʻole ke ʻano pressurized no ka decomposition. Ua hoʻohana mua ʻia nā waikawa momona manuahi i ke ʻano kaomi wai no ka wehe ʻana i ka waikawa palmitic a me ka waikawa oleic ma 30 ~ 40 ℃, a laila hoʻoheheʻe ʻia i loko o ka ethanol, a ukali ʻia e ka hoʻohui ʻana o ka barium acetate a i ʻole ka magnesium acetate e hoʻoulu ai i ka stearate. A laila e hoʻohui hou i ka waikawa sulfuric dilute e loaʻa ai ka waikawa stearate manuahi, kānana a lawe iā ia, a hoʻopili hou i loko o ka ethanol e loaʻa ai ka waikawa stearic maʻemaʻe.