Lub ntsiab chromium compound siv rau tawv tanning yog chromium (III) hydroxide sulphate, Cr(OH)SO4 (CAS No. 12336-95-7; EC No. 235 -595-8). Chromium cuam tshuam nrog ntau yam tsis zoo rau ib puag ncig thiab tib neeg kev noj qab haus huv.
Chromium siv li cas hauv tawv tawv?
Chromium ntsev, tshwj xeeb tshaj yog chrome alum thiab chromium (III) sulfate, yog siv hauv chromium-tanning ntawm tawv. Lub chromium stabilizes tawv los ntawm kev sib txuas ntawm collagen fibers. Chromium tanned tawv tuaj yeem muaj li ntawm 4 thiab 5% ntawm chromium, uas yog nruj nreem khi rau cov proteins.
Yuav ua li cas siv cov tawv nqaij tawv?
Peb cov tshuaj tanning uas siv ntau tshaj plaws yog zaub tannin, ntxhia ntsev xws li chromium sulfate, thiab ntses lossis tsiaj roj. Saib kuj tawv. Cov txheej txheem qub tshaj plaws ntawm tanning tso siab rau cov tshuaj ua haujlwm ntawm cov khoom siv zaub uas muaj tannin, lossis tannic acid, ntawm cov proteins ntawm daim tawv nqaij.
Yuav ua li cas cov organic compound yog dav siv nyob rau hauv tanning ntawm tawv?
Chrome alum yog pab tau rau cov tawv nqaij tanning, nws stabilizes tawv los ntawm cross linking collagen fibers nyob rau hauv tawv.
Chromium tanned tawv yog dab tsi?
Chrome tanning siv daws cov tshuaj, acids, thiab ntsev(xws li chromium sulfate) kom tan lub zais. Nws yog txheej txheem ceev heev, siv sijhawm ib hnublos tsim ib daim tawv tanned. … Tag nrho cov hides ces tawm los saib xiav (lub npe hu ua “dawb xiav”). Xyoo 2008, kwv yees li 24 lab tons ntawm chromium tau tsim.
