Mugadziri Mutengo Wakanaka Stearic acid CAS:57-11-4

tsananguro pfupi:

Stearic acid: (yemhando yeindasitiri) Octadecanoic acid, C18H36O2, inogadzirwa nehydrolysis yemafuta uye inonyanya kushandiswa mukugadzira stearate.
Stearic Acid-829 Stearic acid, Stearic acid iacid yakasimba inotorwa kubva mumafuta emhuka nemiriwo, ayo makuru ari stearic acid (C18H36O2) uye palmitic acid (C16H32O2).
Chigadzirwa ichi chichena kana chichena chakaita seupfu kana crystalline hard block, chimiro chayo chine microstrip luster fine needle crystal; Chine hwema hushoma hwakafanana nemafuta uye hachina kunaka. Chigadzirwa ichi chinonyungudika mu chloroform kana diethyl ether, chakanyungudika mu ethanol, chisinganyungudike mumvura. Nzvimbo yechando Nzvimbo yechando (Appendix Ⅵ D) yechigadzirwa hachifanirwe kunge chiri pasi pe 54℃. Kukosha kweiodine Kukosha kweiodine kwechigadzirwa ichi (Appendix Ⅶ H) hakupfuuri 4. Kukosha kweAcid (Appendix Ⅶ H) yechigadzirwa ichi kunobva pa 203 kusvika 210. Stearate inokurumidza kusangana ne magnesium ne calcium ions kugadzira magnesium stearate uye calcium stearate (white precipitate).
Stearic acid CAS 57-11-4
Zita reChigadzirwa: Stearic acid

CAS: 57-11-4

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ACIDUM STEARICUM 50; ACETYLACETIC ACID; FEMA 3035; CARBOXYLIC ACID C18; C18; C18:0 ACID YEMAHARA; hystrene5016; hystrene7018

Mashandisirwo eStearic acid

Stearic acid, (yemhando yeindasitiri) Stearic acid ndeimwe yemafuta akawanda ane machain fatty acids anosanganisira mafuta nemafuta. Inowanikwa mumafuta emhuka, mafuta nemamwe marudzi emafuta emiriwo pamwe chete ne glycerides. Mafuta aya, mushure me hydrolysis, anogadzira stearic acid.
Stearic acid iacid ine mafuta akawanda inowanikwa zvakanyanya uye ine hunhu hwemakemikari hwecarboxylic acids. Mafuta akawanda nemafuta ane huwandu hwakati hwestearic acid ine mafuta emhuka akawandisa. Semuenzaniso, huwandu hwemafuta mubhota hunogona kusvika 24% nepo huwandu hwemafuta emuriwo hwakaderera, kukosha kwemafuta etii kuri 0.8% uye mafuta ari muchindwe ari 6%. Zvisinei, huwandu hwecocoa hunogona kusvika 34%.

Kune nzira mbiri huru dzekugadzira stearic acid mumaindasitiri, dzinoti nzira yekupatsanura (fractionation) uye nzira yekudzvanya (compression method). Wedzera chinhu chinoora mumafuta ane hydrogenated, wobva waisa hydrolyze kuti mafuta asina kuchena apedzwe, wozogeza nemvura, wozobvisa tsvina, wobva waita bleach kuti uwane zvigadzirwa zvakapedzwa neglycerol sechikamu chezvakagadzirwa.
Vagadziri vazhinji vepamba vanoshandisa mafuta emhuka pakugadzira. Mamwe marudzi ehunyanzvi hwekugadzira achaita kuti mafuta acid asanyatsogadzirwa ayo anogadzira hwema hunosimudzira panguva yekugadzirwa kwepurasitiki uye tembiricha yepamusoro. Kunyangwe hwema uhwu husina chepfu asi hune simba rakakwana pakushanda uye nharaunda. Mhando zhinji dze stearic acid dzinobva kunze kwenyika dzinotora mafuta emuriwo sezvinhu zvakagadzirwa, maitiro ekugadzira akanyanya kufambira mberi; stearic acid inogadzirwa inoshanda zvakanaka, ine hunhu hwakanaka hwekuzora mafuta uye haina hwema hwakawanda pakushandiswa.
Stearic acid inonyanya kushandiswa kugadzira ma stearates akadai se sodium stearate, magnesium stearate, calcium stearate, lead stearate, aluminium stearate, cadmium stearate, iron stearate, uye potassium stearate. Munyu we sodium kana potassium we stearic acid ndiwo unoumba sipo. Kunyangwe sodium stearate isina simba rekubvisa tsvina pane sodium palmitate, kuvapo kwayo kunogona kuwedzera kuoma kwesipo.
Tora bota sezvinhu zvisina kugadzirwa, pfuura ne sulfuric acid kana nzira yakamanikidzwa yekuora. Mafuta emafuta akasununguka akatanga ashandiswa kubvisa palmitic acid ne oleic acid pa30~40 ℃, obva anyungudutswa mu ethanol, oteverwa nekuwedzera barium acetate kana magnesium acetate iyo inoita kuti stearate iite. Wobva wawedzera sulfuric acid yakasanganiswa kuti uwane free stearate acid, sefa woitora, wozoigadzirisa zvakare mu ethanol kuti uwane pure stearic acid.