Txoj Kev Npaj
Ua ntej, ib qho concentrated sulfuric acid catalyst yog ntxiv rau autoclave. Tom qab kaw lub nkoj, huab cua sab hauv yog purged peb zaug siv carbon monoxide (CO). Tom qab ntawd cov tshuaj tiv thaiv yog rhuab, nplawm yog pib, thiab CO yog nkag mus rau hauv lub system mus rau ib tug siab ntawm 2-9.5 MPa. Lub siab yog khaws cia tas mus li thoob plaws hauv cov txheej txheem tshuaj tiv thaiv thaum isobutene ntxiv dropwise rau hauv lub cev ntawm tus nqi tshwj xeeb. Tom qab qhov sib ntxiv ua tiav, nplawm yog txuas ntxiv rau ib lub sijhawm tshwj xeeb; lub siab yog ces tso tawm, thiab cov khoom yog tawm mus yield ib crude synthesis kua. Nyob rau hauv cov xwm txheej nplawm, cov kua roj ntsha hluavtaws maj mam hliv rau hauv dej khov. Tom qab qhov sib ntxiv tiav lawm, nplawm txuas ntxiv rau lwm 7 feeb, ua raws li kev sawv ntsug kom tso cai rau theem sib cais. Cov theem saum toj kawg nkaus ntawm cov organic muaj crude trimethylacetic acid, uas yog tom qab ntawd raug rau GC tsom xam. Tom qab ntawd, lub tshuab nqus tsev distillation yog ua los sau cov trimethylacetic acid feem; cov txheej txheem qis muaj cov theem sulfuric acid. Cov dilute sulfuric acid yog muab rho tawm siv cov organic hnyav, concentrated, thiab rov ua dua tshiab. Thaum kawg, trimethylacetic acid yog reacted nrog poov tshuaj hydroxide nyob rau hauv ib tug 1: 1 molar ratio, ua raws li los ntawm recrystallization, kom tau poov tshuaj pivalate.
Cia
Raws li cov organic compound, potassium pivalate xav tau kev saib xyuas tshwj xeeb thaum lub sijhawm khaws cia kom ntseeg tau tias nws muaj kev nyab xeeb thiab ruaj khov. Nws yuav tsum tau khaws cia rau hauv lub thawv kaw nruj nreem, tsis txhob raug cov dej noo, qhov kub thiab txias, lossis tshav ntuj ncaj qha, vim tias cov xwm txheej no yuav cuam tshuam rau nws cov tshuaj lom neeg thiab zoo. Nws yuav tsum tau muab cia rau hauv qhov chaw txias, qhuav, thiab zoo - qhov cua qhov chaw kom txo tau qhov kev pheej hmoo ntawm kev nqus dej los yog decomposition. Tsis tas li ntawd, vim nws qhov xwm txheej me ntsis corrosive- uas tuaj yeem ua rau cov khoom siv hlau puas tsuaj - cov thawv tsim nyog yuav tsum tau siv los khaws cia, xws li cov thawv ntoo uas muaj cov hnab yas lossis lwm cov khoom ntim uas tsis hnov mob nrog cov khoom.
