Kunezinqubo ezimbili zokukhiqiza i- calcium chloride , enye indlela ye-asidi kanti enye yindlela ye-alkali.
Indlela ye-asidi ilungiswa ngokuyinhloko ukusabela kwamakhemikhali e-limestone ne-hydrochloric acid. Cishe u-22% we-dilute hydrochloric acid usetshenziselwa ukusabela nge-limestone (equkethe cishe u-52% we-calcium) ukukhiqiza u-27% we-calcium chloride owuketshezi. Ngemuva kokuhlunga nokuhlukaniswa, okusele kwesihlungi kuyalahlwa. I-filtrate ingathathi hlangothi ngobisi lwe-lime ukulungisa i-pH = 8.9-9. Ukungcola esixazululweni se-calcium chloride okufana nami, i-Fe, al1, njll. kwakha i-insoluble me (OH) 2, Fe (OH) 3, A1 (OH) 3, njll. ukuze kunemvula. Ikhekhe lesihlungi liwudoti oqinile, I-filtrate ingaphansi kwemiphumela emithathu ephoqelelwe ukugeleza kwe-vacuum evaporation ukuze igxilise isixazululo se-calcium chloride esingu-27% kuya ku-68-69%, bese ifakwa ku-flaker ukuze ikhiqize. I-flake calcium chloride yomiswa embhedeni omanzi ukuze ikhiqize u-74% we-calcium chloride dihydrate.
Indlela ye-alkali ikhiqiza i-calcium chloride: 1. Inqubo yokuhwamuka eqondile ye-calcium chloride: ngokuvamile, okuqukethwe kwe-calcium chloride otshwaleni obudoti bomlotha wesoda kungu-76.8g/l. Ngemuva kokuhlanzwa, kuqala kugxilwe, kuhlukaniswe amakristalu angenamsebenzi, bese kugxilwa ukuze kutholakale i-calcium chloride.
2. Inqubo kasawoti ye-calcium chloride ngaphambi kokuhwamuka: ngokuvamile, ukusakazeka kwenkundla kasawoti kusetshenziselwa ukuhwamulisa ngokwemvelo uketshezi lwemfucumfucu yesoda. Usawoti oketshezini olulahlwayo uyaxazululwa, futhi usawoti oketshezini oluwudoti uzoncipha kuqala. Ngokunyuka kokuhwamuka, usawoti omningi uzowa. Uketshezi olusele lwe-calcium chloride luzoqoqwa emshinini wokuhwamuka, bese kutholwa i-calcium chloride.
Umehluko phakathi kwezinqubo ezimbili zokukhiqiza ukuthi ubulukhuni be-calcium chloride obukhiqizwa indlela ye-asidi buphakeme kunaleyo ngendlela ye-alkali, kodwa kukhona ukungcola okuningi, umbala ongazinzile kanye nokunambitheka, futhi indlela ye-asidi ishibhile kunendlela ye-alkali. Amaphilisi e-calcium chloride atholwe ngenqubo ye-alkali mancane futhi antekenteke, anobumsulwa obuphakeme, ukungcola okumbalwa nombala omhlophe kakhulu.
Isikhathi sokuthumela: Aug-09-2022