Onye nrụpụta ezigbo ọnụ ahịa Stearic acid CAS:57-11-4

nkọwa dị mkpirikpi:

Asịd Stearic: (ọkwa ụlọ ọrụ mmepụta ihe) Octadecanoic acid, C18H36O2, na-emepụta site na hydrolysis nke mmanụ ma a na-ejikarị ya eme ihe na mmepụta stearate
Acid Stearic-829, Stearic acid bụ abụba siri ike nke a na-enweta site na abụba anụmanụ na akwụkwọ nri, ihe ndị bụ isi dị na ya bụ stearic acid (C18H36O2) na palmitic acid (C16H32O2).
Ngwaahịa a dị ọcha ma ọ bụ ọcha dịka ntụ ntụ ma ọ bụ ihe mkpuchi siri ike kristal, profaịlụ ya nwere obere agịga microstrip luster; O nwere obere isi yiri mmanụ ma ọ nweghị ụtọ. Ngwaahịa a na-agbaze na chloroform ma ọ bụ diethyl ether, agbazere na ethanol, ọ fọrọ nke nta ka ọ ghara ịgbaze na mmiri. Ebe oyi na-atụ Ebe oyi na-atụ (Ihe mgbakwunye Ⅵ D) nke ngwaahịa a agaghị adị ala karịa 54℃. Uru iodine Uru iodine nke ngwaahịa a (Ihe mgbakwunye Ⅶ H) agaghị agafe 4. Uru Acid (Ihe mgbakwunye Ⅶ H) nke ngwaahịa a sitere na 203 ruo 210. Stearate na-emeghachi omume ngwa ngwa na magnesium na calcium ion iji mepụta magnesium stearate na calcium stearate (ihe mkpuchi ọcha)
Stearic acid CAS 57-11-4
Aha Ngwaahịa: Stearic acid

CAS: 57-11-4

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Nkọwa Ngwaahịa

Akara Ngwaahịa

Okwu ndị yiri ya

Acidum Stearicum 50; CETYLACETIC ACID; FEMA 3035; CARBOXYLIC ACID C18; C18; C18:0 FATTY ACID; hystrene5016; hystrene7018

Ngwa nke stearic acid

Asịd Stearic, (ọkwa ụlọ ọrụ mmepụta ihe) Stearic acid bụ otu n'ime ọtụtụ abụba dị ogologo nke nwere mmanụ na abụba. A na-ahụ ya n'ụdị abụba anụmanụ, mmanụ na ụdị mmanụ akwụkwọ nri dị iche iche n'ụdị glycerides. Mmanụ ndị a, mgbe hydrolysis gasịrị, na-emepụta stearic acid.
Asịd Stearic bụ abụba dị n'okike nke ukwuu ma nwee ihe ndị metụtara kemịkalụ nke carboxylic acid. Ihe fọrọ nke nta ka ọ bụrụ ụdị abụba na mmanụ niile nwere ụfọdụ stearic acid, ebe abụba anụmanụ dị n'ime ya dị elu. Dịka ọmụmaatụ, ihe dị na bọta nwere ike iru 24% ebe ihe dị na mmanụ akwụkwọ nri dị obere, uru dị na mmanụ tii bụ 0.8%, mmanụ dị n'ọbụ aka bụkwa 6%. Agbanyeghị, ihe dị na koko nwere ike iru 34%.

E nwere ụzọ abụọ dị mkpa e si emepụta stearic acid n'ụlọ ọrụ mmepụta ihe, ya bụ, usoro nkewa na mkpakọ. Tinye ihe na-emebi ihe na mmanụ hydrogenated, wee jiri hydrolyze mee ka ọ bụrụ abụba nkịtị, gaa n'ihu ịsa ahụ na mmiri, ịgbasa ya, na ịcha ọcha iji nweta ngwaahịa emechara na glycerol dị ka ihe na-esote.
Ọtụtụ ndị na-emepụta ihe n'ụlọ na-eji abụba anụmanụ emepụta ihe. Ụfọdụ ụdị teknụzụ mmepụta ga-eme ka a ghara imecha mmepụta abụba nke na-emepụta isi na-akpali akpali n'oge a na-emepụta plastik na okpomọkụ dị elu. Ọ bụ ezie na isi ndị a enweghị ihe na-egbu egbu mana ha ga-enwe mmetụta ụfọdụ na ọnọdụ ọrụ na gburugburu ebe obibi. Ụdị stearic acid a na-ebubata na-ewere mmanụ akwụkwọ nri dị ka ihe eji emepụta ihe, usoro mmepụta ahụ ka dị elu; stearic acid a na-emepụta anaghị arụ ọrụ nke ọma, ọ na-emekwa ka mmanụ dị mma, ọ naghịkwa esi ísì ụtọ n'ọrụ.
A na-ejikarị stearic acid emepụta stearates dịka sodium stearate, magnesium stearate, calcium stearate, lead stearate, aluminum stearate, cadmium stearate, iron stearate, na potassium stearate. Nnu sodium ma ọ bụ potassium nke stearic acid bụ ihe mejupụtara ncha. Ọ bụ ezie na sodium stearate enweghị ike iwepụ ihe ruru unyi dịka sodium palmitate, mana ọnụnọ ya nwere ike ime ka ncha sie ike.
Were bọta dị ka ihe e ji emepụta ihe, jiri sọlfọlik acid ma ọ bụ usoro nrụgide mee ka ọ gbazee. A na-ebu ụzọ jiri usoro nrụgide mmiri wepụ palmitic acid na oleic acid na 30 ~ 40 ℃, wee gbazee na ethanol, wee tinye barium acetate ma ọ bụ magnesium acetate nke na-akpali stearate. Mgbe ahụ tinyekwuo sulfuric acid ka ọ dị nro iji nweta stearate acid, yochaa ya ma were ya, wee kristallize ọzọ na ethanol iji nweta stearic acid dị ọcha.