Mai ƙera Stearic acid mai kyau CAS:57-11-4

Stearic acid, (matakin masana'antu) Stearic acid yana ɗaya daga cikin manyan fatty acids masu tsayi waɗanda suka ƙunshi mai da mai. Ana samunsa a cikin kitsen dabbobi, mai da wasu nau'ikan man kayan lambu kamar glycerides. Waɗannan mai, bayan hydrolysis, suna samar da stearic acid.
Stearic acid wani sinadari ne mai kitse wanda yake wanzuwa a yanayi kuma yana da sinadari na carboxylic acid gabaɗaya. Kusan dukkan nau'ikan kitse da mai suna ɗauke da wani adadin stearic acid tare da yawan kitsen dabbobi. Misali, abun da ke cikin man shanu zai iya kaiwa har zuwa kashi 24% yayin da abun da ke cikin man kayan lambu yake ƙasa da haka, ƙimar man shayi shine kashi 0.8%, kuma man dabino shine kashi 6%. Duk da haka, abun da ke cikin koko zai iya kaiwa har zuwa kashi 34%.

Akwai manyan hanyoyi guda biyu na samar da sinadarin stearic acid a masana'antu, wato hanyar rabawa da matsewa. Sai a zuba sinadarin hydrogenated a cikin man, sannan a zuba hydrolyze domin samar da sinadarin fatty acid, sannan a yi amfani da shi wajen wankewa da ruwa, a tace, a yi bleaching domin samun kayayyakin da aka gama da glycerol a matsayin wani abu da ya biyo baya.
Yawancin masana'antun cikin gida suna amfani da kitsen dabbobi don samarwa. Wasu nau'ikan fasahar samarwa za su haifar da rashin kammala narkewar kitse wanda ke samar da ƙamshi mai ban sha'awa a lokacin sarrafa filastik da kuma yanayin zafi mai yawa. Duk da cewa waɗannan wari ba su da guba amma za su yi tasiri sosai kan yanayin aiki da muhallin halitta. Yawancin nau'in stearic acid da aka shigo da shi daga ƙasashen waje yana ɗaukar man kayan lambu a matsayin kayan masarufi, hanyoyin samarwa sun fi ci gaba; stearic acid da aka samar yana da aiki mai kyau, kyakkyawan sinadari mai laushi da ƙarancin ƙamshi a aikace.
Ana amfani da sinadarin stearic acid musamman wajen samar da sinadarin stearates kamar su sodium stearate, magnesium stearate, calcium stearate, lead stearate, aluminum stearate, cadmium stearate, iron stearate, da potassium stearate. Gishirin sodium ko potassium na stearic acid shine sinadarin sabulu. Duk da cewa sodium stearate ba shi da ikon kawar da gurɓatawa kamar sodium palmitate, amma kasancewarsa na iya ƙara taurin sabulu.
A ɗauki man shanu a matsayin ɗanyen abu, a yi amfani da sinadarin sulfuric acid ko kuma hanyar da aka matsa don ruɓewa. Da farko an yi amfani da sinadarin free fatty acids wajen cire sinadarin palmitic acid da oleic acid a zafin 30-40 ℃, sannan a narkar da su a cikin ethanol, sannan a ƙara sinadarin barium acetate ko magnesium acetate wanda ke haifar da stearate. Sannan a ƙara sinadarin sulfuric acid mai narkewa don samun sinadarin free stearate acid, a tace a ɗauka, sannan a sake yin crystallize a cikin ethanol don samun sinadarin stearic acid mai tsarki.