Kaihanga Utu Pai Waikawa Stearic CAS: 57-11-4

Waikawa stearic, (taumata ahumahi) Ko te waikawa stearic tētahi o ngā waikawa ngako mekameka roa nui e whai kiko ana, arā, ko ngā hinu me ngā ngako. Kei roto i ngā ngako kararehe, te hinu me ētahi momo hinu huawhenua, tae atu ki te ahua o ngā glycerides. I muri i te hydrolysis, ka puta te waikawa stearic i ēnei hinu.
He waikawa ngako whānui te waikawa stearic i roto i te taiao, ā, he rite tonu ōna āhuatanga matū ki ngā waikawa carboxylic. Tata ki ngā momo ngako me ngā hinu katoa he nui te waikawa stearic, ā, he nui te ihirangi o ngā ngako kararehe. Hei tauira, ka eke te ihirangi o te pata ki te 24%, ko te ihirangi o te hinu huawhenua he iti noa iho, ko te uara o te hinu tī he 0.8%, ā, ko te hinu nikau he 6%. Heoi, ka eke te ihirangi o te koko ki te 34%.

E rua ngā huarahi matua mō te whakaputa waikawa stearic ā-ahumahi, arā, te tikanga wehewehe me te tikanga kōpeketanga. Tāpirihia te matū pirau ki te hinu hauwai, kātahi ka whakapūkara kia puta te waikawa ngako mata, ka horoia ki te wai, ka whakatōtō, ka whakamakuku kia puta ai ngā hua kua oti me te glycerol hei hua taha.
Ko te nuinga o ngā kaihanga o te kāinga e whakamahi ana i te ngako kararehe mō te hanga. Mā ētahi momo hangarau hanga ka kore e oti te whakahoro i te waikawa ngako, ka puta he kakara whakaohooho i te wā e tukatukahia ana te kirihou me te pāmahana tiketike. Ahakoa kāore he paitini o ēnei kakara, ka pā ki ngā āhuatanga mahi me te taiao. Ko te nuinga o ngā momo waikawa stearic kawemai e whakamahi ana i te hinu huawhenua hei rauemi mata, he matatau ake ngā tukanga hanga; he pumau te mahi a te waikawa stearic i hangaia, he pai te āhuatanga whakahinuhinu, ā, he iti ake te kakara i te whakamahinga.
Ko te waikawa stearic te nuinga o te wā e whakamahia ana mō te hanga stearates pērā i te konutai stearate, te konupūmā stearate, te konupūmā stearate, te mata stearate, te konumohe stearate, te cadmium stearate, te rino stearate, me te pāhare pākawa. Ko te tote konutai, te pāhare pākawa rānei o te waikawa stearic te wāhanga o te hopi. Ahakoa he iti ake te kaha o te konutai stearate ki te horoi i te paru i te konutai palmitate, engari ko tōna aroaro ka whakanui ake i te pakeke o te hopi.
Hei rauemi mata, whakamahia te pata, te waikawa whanariki, te tikanga pēhanga rānei hei pirau. Ko ngā waikawa ngako kore utu i whakamahia te tikanga pēhanga wai hei tango i te waikawa palmitic me te waikawa oleic i te 30~40 ℃, kātahi ka rewa ki roto i te etanoru, ā, muri iho ka tāpirihia te barium acetate, te konupūmā acetate rānei hei whakapūmau i te stearate. Kātahi ka tāpirihia te waikawa whanariki waimeha hei tiki i te waikawa stearate kore utu, tātarihia, ka tangohia, ka whakakōhatu anō ki roto i te etanoru hei tiki i te waikawa stearic parakore.