Hauj lwm lawm

Kev tsis

Stearic acid Plaj

1.Stearic Acid qhia

Stearic acid (C18H36O2) yog qhov tshwm sim dav dav ntawm cov roj fatty acids nyob rau hauv cov xwm txheej, muaj ntau yam sib txawv hauv yuav luag txhua cov rog thiab roj (C39H74O6). Stearic acid feem ntau yog siv los tsim cov stearate xws li sodium stearate, magnesium stearate, calcium stearate, txhuas stearate, txhuas stearate, stearic acid pick, hlau stearate, thiab potassium stearate. Cov no tau siv dav hauv kev tsim cov tshuaj pleev ib ce, ua cov yas rau kev txhim kho cov kab mob khaub thuas hauv cov yas, raws li cov neeg ua haujlwm tso tawm, stabilizers, surfactants, roj hmab vulcanization accelerators, dej repellent, polishing agents, hlau soaps, flotation agents for metal minerals, softeners, pharmaceuticals, thiab lwm yam organic tshuaj. Tsis tas li ntawd, nws yog siv los ua cov kuab tshuaj rau cov roj-soluble pigments, tus neeg sawv cev smoothing nyob rau hauv crayons, glossing tus neeg sawv cev rau daim ntawv ciab, thiab emulsifier rau stearic acid glycerides.

Cov khoom siv tseem ceeb rau stearic acid, sib nrug los ntawm cov roj xibtes, suav nrog cov roj siab, roj, roj txiv roj, roj gutter thiab roj acid thiab lwm yam.

2.Cov txheej txheem luv luv qhia txog Stearic Acid Plant

Lub ntsiab lus sib npaug

C18H34O2 + H2 → C18H36O2

C39H74O6+ H2O → C18H36O2 + C3H8O3

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Cov roj txiv roj melted (los yog cov roj ua kom zoo zoo tsiaj esters) yog thauj mus rau lub siab-siab ntauwd kettle los ntawm lub twj tso kua mis siab, thaum hydrogen gas kuj tau qhia. Kev thauj mus los ntawm xibtes roj rau hydrogen roj yog hloov kho, thiab qhov kub thiab txias yog tswj kom ruaj khov ntawm 250 ± 5 degree. Qhov sib xyaw catalyst yog txuas ntxiv ntxiv raws li qhov xwm txheej tshwm sim; Tom qab ntawd, cov khoom siv txuas ntxiv tso tawm los ntawm cov pej thuam hydrogenation, thiab cov roj hydrogen tau sib cais los ntawm cov kua tshuaj tiv thaiv los ntawm kev sib cais. Cov kua tshuaj tiv thaiv yog tom qab ntawd tso rau hauv lub siab-siab hydrolysis ntauwd, thiab ib qho kev faib ua feem ntawm cov dej mos yog pub rau hauv. Cov tshuaj tiv thaiv kub yog tswj ntawm ib ncig ntawm 250 degree. Glycerol aqueous tov thiab thawj cov roj hardened yog tawm los ntawm sab saum toj thiab hauv qab ntawm tus pej thuam, raws li. Thawj cov roj hardened yog flash evaporated, rectified, hlais los yog granulated, thiab tsim nyog stearic acid yog ntim thiab khaws cia. Cov tshuaj glycerol aqueous rov qab tau ua kom huv thiab siv los ntawm cov khoom lag luam.

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