Soo saaraha Qiimaha Wanaagsan Stearic acid CAS: 57-11-4
La mid ah
ACIDUM STEARICUM 50; CETYLAACETIC ACID; FEMA 3035; CARBOXYLIC ACID C18;C18;C18:0 FATTY ACID;hystrene5016;hystrene7018
Codsiyada Stearic acid
Stearic acid, (darajada warshadaha) Stearic acid waa mid ka mid ah dhowr asiidh dufan leh oo silsilad dheer ah oo ka kooban saliido iyo dufan.Waxaa lagu soo bandhigaa dufanka xayawaanka, saliidda iyo qaar ka mid ah noocyada saliidda khudradda iyo sidoo kale qaabka glycerides.Saliidahani, ka dib hydrolysis, waxay soo saaraan stearic acid.
Stearic acid waa asiidh dufan leh oo si ballaaran u jirta dabeecadda waxayna leedahay sifooyinka kiimikada guud ee asiidhyada karboksilic.Ku dhawaad dhammaan noocyada dufanka iyo saliidda waxaa ku jira xaddi go'an oo ah aashitada stearic iyada oo waxa ku jira dufanka xayawaanku ay yihiin kuwo aad u sarreeya.Tusaale ahaan waxa subaga ku jira waxa uu gaadhi karaa ilaa 24% halka waxa ku jira saliidda khudradu ay aad u hoosayso iyada oo qiimihiisu yahay 0.8% saliidda timirtana 6%.Si kastaba ha ahaatee, waxa ku jira kookaha waxa ay gaadhi kartaa ilaa 34%.
Waxa jira laba hab oo waaweyn oo wax-soo-saarka warshadaha ee stearic acid, kuwaas oo kala ah jajabinta iyo habka isku-buufinta.Ku dar wakiilka qudhunka ah ee saliidda hydrogenated, ka dibna hydrolyze si ay u siiyaan acid dufan cayriin ah, sii maraan iyada oo lagu dhaqo biyo, distillation, bleaching si aad u hesho alaabta la dhammeeyey la glycerol sida byproduct.
Inta badan soosaarayaasha gudaha waxay u isticmaalaan dufanka xoolaha wax soo saarka.Qaar ka mid ah noocyada tignoolajiyada wax-soo-saarka ayaa keeni doona dhamaystir-la'aanta nadiifinta aashitada dufanka leh ee soo saara ur soo jiidasho leh wakhtiga habaynta balaastiga iyo heerkulka sare.Inkasta oo urtaasi aysan ahayn mid sun ah, laakiin waxay saameyn gaar ah ku yeelan doonaan xaaladaha shaqada iyo deegaanka dabiiciga ah.Nooca ugu badan ee laga keeno stearic acid waxay qaadataa saliidda cuntada sida alaabta ceeriin, hababka wax soo saarka ayaa aad u horumarsan;Aashitada stearic ee la soo saaray waa waxqabadka xasilloon, hantida sifaynta wanaagsan iyo ur yar ee codsiga.
Stearic acid waxaa inta badan loo isticmaalaa soo saarista stearates sida sodium stearate, magnesium stearate, calcium stearate, stearate rasaas, aluminium stearate, cadmium stearate, birta stearate, iyo potassium stearate.Sodium ama cusbada potassium ee stearic acid waa qaybta saabuunta.Inkasta oo sodium stearate ay leedahay awood sun-saar yar marka loo eego sodium palmitate, laakiin joogitaankeeda waxay kordhin kartaa adkaanta saabuunta.
U qaado subagga sidii wax cayriin ah, dhex mari aashitada sulfuric ama habka la cadaadiyo ee burburka.Asiidhyada dufanka leh ee bilaashka ah ayaa marka hore ku xiran habka cadaadiska biyaha si looga saaro palmitic acid iyo oleic acid at 30 ~ 40 ℃, ka dibna lagu milmo ethanol, oo ay ku xigto barium acetate ama magnesium acetate taas oo soo saarta stearate.Dabadeed ku sii dar sulfuric acid si aad u heshid aashitada stearate ee bilaashka ah, miir oo qaado, oo dib-u-crystallize in ethanol si aad u hesho stearic acid saafi ah.
Tilmaamaha stearic acid
ITEM | |
Qiimaha iodine | ≤8 |
Qiimaha acid | 192-218 |
Qiimaha saponification | 193-220 |
Midabka | ≤400 |
Meesha dhalaalka,℃ | ≥52 |
Qoyaanka | ≤0.1 |
Xirmooyinka Stearic acid
25kg/bac Stearic acid
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