xov xwm

Muaj ob txoj kev lag luam rau kev tsim khoomcaustic dej qab zib: causticization thiab electrolysis. Txoj kev causticization yog muab faib ua dej qab zib tshauv causticization txoj kev thiab ntuj alkali causticization txoj kev raws li raw cov ntaub ntawv sib txawv; Txoj kev electrolysis tuaj yeem muab faib ua diaphragm electrolysis method thiab ion exchange membrane method.
Soda tshauv causticization txoj kev: Soda tshauv thiab txiv qaub yog hloov dua siab tshiab rau hauv dej qab zib tshauv tov thiab tshauv yog hloov dua siab tshiab rau hauv txiv qaub mis nyuj. Cov tshuaj tiv thaiv causticization yog nqa tawm ntawm 99-101 ℃. Lub causticization kua yog clarified, evaporated thiab concentrated rau ntau tshaj 40%. Ua kua caustic soda. Cov kua concentrated yog ntxiv concentrated thiab solidified kom tau cov khoom caustic soda tiav cov khoom. Cov av nkos causticizing yog ntxuav nrog dej, thiab cov dej ntxuav yog siv los hloov cov alkali.
Trona causticization txoj kev: trona yog crushed, yaj (los yog alkali halogen), clarified, thiab ces txiv qaub mis nyuj ntxiv rau causticize ntawm 95 mus rau 100 ° C. Lub causticized kua yog clarified, evaporated, thiab concentrated mus rau ib tug NaOH concentration ntawm txog 46%, thiab cov kua ntshiab yog txias. , ntsev los nag thiab ntxiv boiling kom mloog zoo kom tau cov khoom caustic soda tiav cov khoom. Cov av nkos causticized yog ntxuav nrog dej, thiab cov dej ntxuav yog siv los yaj trona.
Txoj kev diaphragm electrolysis: ntxiv dej qab zib tshauv, caustic soda, thiab barium chloride mloog zoo kom tshem tawm cov impurities xws li calcium, magnesium, thiab sulfate ions tom qab thawj salinized ntsev, thiab tom qab ntawd ntxiv sodium polyacrylate los yog causticized bran mus rau lub tank kom ceev los nag, thiab xuab zeb pom Tom qab ntawd, hydrochloric acid yog ntxiv rau neutralization. Lub brine yog preheated thiab xa mus rau electrolysis. Cov electrolyte yog preheated, evaporated, sib cais rau hauv ntsev, thiab txias kom tau cov kua caustic soda, uas yog ntxiv concentrated kom tau cov khoom tiav ntawm cov khoom caustic soda. Ntsev av ntxuav dej yog siv los yaj ntsev.
Ion txauv membrane txoj kev: Tom qab thawj ntsev yog hloov mus rau hauv ntsev, lub brine yog refined raws li ib txwm txoj kev. Tom qab thawj brine lim los ntawm lub microporous sintered carbon tubular lim, nws yog ces refined dua los ntawm ib tug chelating ion pauv resin ntauwd kom thaum lub calcium thiab magnesium cov ntsiab lus nyob rau hauv lub brine poob qis dua 0. 002%, lub thib ob refined brine yog electrolyzed. los tsim cov roj chlorine hauv lub anode chamber. Na + nyob rau hauv lub brine nyob rau hauv lub anode chamber nkag mus rau lub cathode chamber los ntawm lub ion membrane thiab OH- nyob rau hauv lub cathode chamber generates sodium hydroxide. H + raug tso tawm ncaj qha rau ntawm cathode los tsim cov roj hydrogen. Thaum lub sij hawm electrolysis txheej txheem, ib tug tsim nyog tus nqi ntawm high-purity hydrochloric acid yog ntxiv rau lub anode chamber rau neutralize lub remigated OH-, thiab cov dej ntshiab yuav tsum tau ntxiv rau lub cathode chamber. Lub high-purity caustic soda generated nyob rau hauv lub cathode chamber muaj ib tug concentration ntawm 30% mus rau 32% (loj), uas yuav siv tau ncaj qha raws li ib tug kua alkali khoom, los yog yuav tsum tau ntxiv concentrated los ua ib tug khoom caustic soda khoom.