Umenzi Ixabiso Elihle Stearic acid CAS:57-11-4

Umenzi Ixabiso Elihle I-Stearic acid CAS: 57-11-4 Umfanekiso Obonakalayo

inkcazo emfutshane:

I-Stearic acid: (udidi lwemizi-mveliso) I-Octadecanoic acid, i-C18H36O2, iveliswa yi-hydrolysis yeoyile kwaye isetyenziswa kakhulu ekuveliseni i-stearate
I-Stearic Acid-829 I-Stearic acid, I-Stearic acid yi-fatty acid eqinileyo efumaneka kumafutha ezilwanyana kunye nemifuno, apho izinto eziphambili ziyi-stearic acid (C18H36O2) kunye ne-palmitic acid (C16H32O2).
Le mveliso imhlophe okanye imhlophe njengomgubo okanye ibhloko eqinileyo yekristale, iprofayili yayo inekristale yenaliti encinci ye-microstrip luster; Inevumba elincinci elifana negrisi kwaye ayinancasa. Le mveliso iyanyibilika kwi-chloroform okanye kwi-diethyl ether, inyibilikiswe kwi-ethanol, phantse inganyibiliki emanzini. Inqanaba lokuqandisa Iqondo lokuqandisa (Isihlomelo Ⅵ D) lemveliso aliyi kuba ngaphantsi kwe-54℃. Ixabiso le-iodine Ixabiso le-iodine lale mveliso (Isihlomelo Ⅶ H) alikho ngaphezulu kwe-4. Ixabiso le-asidi (Isihlomelo Ⅶ H) lale mveliso liqala kwi-203 ukuya kwi-210. I-Stearate isabela ngokulula kunye ne-magnesium kunye ne-calcium ions ukwenza i-magnesium stearate kunye ne-calcium stearate (i-white precipitate)
I-Stearic acid CAS 57-11-4
Igama leMveliso: I-Stearic acid

I-CAS: 57-11-4

Thumela i-imeyile kuthi

Iinkcukacha zeMveliso

Iithegi zeMveliso

Izithethantonye

I-Acidum Stearicum 50; I-Cetylacetic Acid; I-FEMA 3035; I-Carboxylic Acid C18; C18; C18:0 I-Acidum Fatty Acid; I-Hystrene5016; I-Hystrene7018

Ukusetyenziswa kweStearic acid

I-Stearic acid, (udidi lweshishini) I-Stearic acid yenye yee-fatty acids ezininzi ezinkulu ezinee-long-chain fatty acids eziquka ii-oyile kunye namafutha. Ifumaneka kumafutha ezilwanyana, i-oyile kunye nezinye iintlobo ze-oyile zemifuno kunye ne-glycerides. Ezi oyile, emva kwe-hydrolysis, zivelisa i-stearic acid.
I-Stearic acid yi-fatty acid ekhoyo kakhulu kwindalo kwaye ineempawu zeekhemikhali eziqhelekileyo ze-carboxylic acids. Phantse zonke iintlobo zamafutha kunye neoyile ziqulathe isixa esithile se-stearic acid kunye nomxholo okwi-fat yezilwanyana ophezulu. Umzekelo, umxholo kwibhotolo ungafikelela kwi-24% ngelixa umxholo kwi-oyile yemifuno uphantsi xa ixabiso kwi-oyile yeti liyi-0.8% kwaye ioyile esentendeni iyi-6%. Nangona kunjalo, umxholo kwi-cocoa ungafikelela kwi-34%.

Kukho iindlela ezimbini eziphambili zokuvelisa i-stearic acid kwimizi-mveliso, ezizezi: ukuqhekeza kunye nendlela yokucinezela. Yongeza i-agent yokubola kwi-oyile ene-hydrogenated, uze uyi-hydrolyze ukuze inike i-asidi yamafutha aluhlaza, uqhubeke ngokuhlamba ngamanzi, ukucoca, ukufiphalisa ukuze ufumane iimveliso ezigqityiweyo ezine-glycerol njengemveliso elandelayo.
Uninzi lwabavelisi basekhaya basebenzisa amafutha ezilwanyana ukuvelisa. Ezinye iintlobo zobuchwepheshe bokuvelisa ziya kubangela ukuba i-distillation ye-fatty acid ingasebenzi kakuhle evelisa ivumba elivuselelayo ngexesha lokucubungula iplastiki kunye nobushushu obuphezulu. Nangona la mavumba engenabungozi kodwa aya kuba nefuthe elithile kwiimeko zokusebenza nakwindalo. Uninzi lwe-stearic acid engeniswa kwamanye amazwe ithatha ioyile yemifuno njengezinto eziluhlaza, iinkqubo zokuvelisa ziphucukile; i-stearic acid evelisiweyo isebenza kakuhle, inempahla yokuthambisa elungileyo kwaye ayinavumba lininzi xa isetyenziswa.
I-Stearic acid isetyenziswa kakhulu ekuveliseni ii-stearates ezifana ne-sodium stearate, i-magnesium stearate, i-calcium stearate, i-lead stearate, i-aluminium stearate, i-cadmium stearate, i-iron stearate, kunye ne-potassium stearate. Ityuwa ye-sodium okanye i-potassium ye-stearic acid yinxalenye yesepha. Nangona i-sodium stearate inamandla okucoca ukungcola amancinci kune-sodium palmitate, kodwa ubukho bayo bunokunyusa ubulukhuni besepha.
Thatha ibhotolo njengezinto eziluhlaza, jonga i-sulfuric acid okanye indlela yoxinzelelo ukuze ibole. Ii-fatty acids zasimahla zaqala phantsi kwendlela yoxinzelelo lwamanzi yokususa i-palmitic acid kunye ne-oleic acid kwi-30 ~ 40 ℃, zaza zanyibilika kwi-ethanol, kulandele ukongezwa kwe-barium acetate okanye i-magnesium acetate ebangela i-stearate. Emva koko yongeza i-sulfuric acid enyibilikisiweyo ukuze ufumane i-free stearate acid, uyihluze kwaye uyithathe, kwaye uphinde uyi-crystallize kwi-ethanol ukuze ufumane i-stearic acid ecocekileyo.