Muaj ob txoj kev tsim cov calcium chloride , ib qho yog txoj kev acid thiab lwm yam yog alkali txoj kev.
Txoj kev acid feem ntau yog npaj los ntawm cov tshuaj tiv thaiv ntawm limestone thiab hydrochloric acid. Txog 22% dilute hydrochloric acid yog siv los ua cov pob zeb limestone (muaj li 52% calcium) los tsim 27% kua calcium chloride. Tom qab filtration thiab sib cais, cov lim residue raug muab pov tseg. Cov filtrate yog neutralized nrog txiv qaub kua txiv los kho pH = 8.9-9. Cov impurities nyob rau hauv cov tshuaj calcium chloride xws li kuv, Fe, al1, thiab lwm yam insoluble kuv (OH) 2, Fe (OH) 3, A1 (OH) 3, thiab lwm yam. rau precipitate. Lub ncuav mog qab zib lim yog cov khoom pov tseg, Cov lim dej tau raug rau peb-txhim kho lub tshuab nqus tsev vacuum kom pom zoo 27% calcium chloride tov rau 68-69%, thiab tom qab ntawd nws tau muab tso rau hauv lub flaker rau ntau lawm. Lub flake calcium chloride yog qhuav hauv lub txaj fluidized los tsim 74% calcium chloride dihydrate
Alkali txoj kev tsim calcium chloride: 1. Direct evaporation txheej txheem ntawm calcium chloride: feem ntau, cov ntsiab lus ntawm calcium chloride nyob rau hauv cov khib nyiab cawv ntawm soda tshauv yog 76.8g / l. Tom qab ua kom huv si, nws yog thawj zaug concentrated, cais tawm cov khoom siv tsis muaj txiaj ntsig, thiab tom qab ntawd ua kom muaj zog kom tau txais calcium chloride.
2. Calcium chloride ntsev teb ua ntej evaporation txheej txheem: feem ntau, ntsev teb kis yog siv los lawm evaporate cov dej qab zib tshauv pov tseg kua. Cov ntsev nyob rau hauv cov kua khib nyiab yog tsau, thiab ntsev nyob rau hauv cov kua khib nyiab yuav precipitated ua ntej. Nrog rau qhov nce ntawm evaporation, ntsev ntau dua yuav precipitated. Cov kua calcium chloride ntxiv yuav raug muab sau rau hauv cov khoom siv rau evaporation, thiab calcium chloride yuav tau txais.
Qhov sib txawv ntawm ob txoj kev tsim khoom yog qhov hardness ntawm calcium chloride uas tsim los ntawm txoj kev acid yog siab dua li ntawm alkali txoj kev, tab sis muaj ntau impurities, tsis ruaj tsis khov xim thiab tsw, thiab cov acid txoj kev yog pheej yig dua li alkali txoj kev. Calcium chloride ntsiav tshuaj tau los ntawm cov txheej txheem alkali yog nyias thiab tsis yooj yim, nrog siab purity, ob peb impurities thiab xim dawb heev
Post lub sij hawm: Aug-09-2022