Izindaba - Indlela yokwenza i-caustic soda
izindaba

izindaba

Kunezindlela ezimbili zezimboni zokukhiqizai-caustic soda: i-causticization kanye ne-electrolysis. Indlela ye-causticization ihlukaniswe yaba indlela ye-soda ash causticization kanye nendlela yemvelo ye-alkali causticization ngokusho kwezinto zokusetshenziswa ezahlukene; electrolysis indlela ingahlukaniswa diaphragm electrolysis indlela kanye ion exchange ulwelwesi indlela.
Indlela ye-soda ash causticization: Umlotha wesoda nomcako uguqulwa ube isixazululo somlotha wesoda bese umlotha uguqulwa ube ubisi lwe-lime ngokulandelana. Ukusabela kwe-causticization kwenziwa ku-99-101 ℃. Uketshezi lwe-causticization luyacaciswa, luhwamuke futhi lugxiliswe ngaphezu kwama-40%. Isoda ye-caustic ewuketshezi. Uketshezi olugxilile luphinde lugxiliswe futhi luqiniswe ukuze kutholwe umkhiqizo oqediwe we-soda ye-caustic. Udaka oluyi-causticizing lugezwa ngamanzi, futhi amanzi okugeza asetshenziselwa ukuguqula i-alkali.
Indlela ye-Trona causticization: i-trona iyachotshozwa, incibilike (noma i-alkali halogen), icaciswe, bese kwengezwa ubisi lwe-lime ukuze i-causticize ku-95 kuya ku-100 ° C. Uketshezi oluyi-causticized luyacaciswa, luhwamuke, futhi lugxiliswe ekuhlanganiseni kwe-NaOH okungaba ngu-46%, futhi uketshezi olucacile luyapholiswa. , imvula kasawoti kanye nokubilisa okuqhubekayo ukuze kugxilwe ukuze kutholakale isiphuzo esiqinile se-caustic soda umkhiqizo oqediwe. Udaka oluyi-causticized lugezwa ngamanzi, futhi amanzi okugeza asetshenziselwa ukuncibilikisa i-trona.
Indlela ye-diaphragm electrolysis: engeza i-soda ash, i-caustic soda, ne-barium chloride concentrate ukuze ususe ukungcola okufana ne-calcium, i-magnesium, nama-ion e-sulfate ngemva kosawoti wokuqala ofakwe usawoti, bese wengeza i-polyacrylate ye-sodium noma i-causticized bran ethangini lokucacisa ukuze usheshise imvula, futhi ukuhlunga kwesihlabathi Ngemva kwalokho, i-hydrochloric acid yengezwa ukuze i-neutralization. I-brine ishisa futhi ithunyelwa ku-electrolysis. I-electrolyte iyashisisa, ihwamuke, ihlukaniswe ibe usawoti, bese ipholiswa ukuze kutholakale uketshezi lwe-caustic soda, oluphinde lugxiliswe ukuze kutholwe umkhiqizo osuphelile wesoda ye-caustic eqinile. Amanzi okugeza odaka lukasawoti asetshenziselwa ukuncibilikisa usawoti.
Indlela ye-Ion yokushintshanisa ulwelwesi: Ngemva kokuba usawoti wangempela uguqulwa ube usawoti, amanzi ahlanzekile acwengwa ngendlela evamile. Ngemva kokuba i-brine eyinhloko isihlungiwe ngesihlungi se-carbon tubular esine-microporous sintered, bese icwengisiswa futhi ngombhoshongo we-chelating ion exchange resin ukuze kwenziwe Lapho okuqukethwe kwe-calcium ne-magnesium ku-brine kwehla ngaphansi kuka-0. 002%, i-brine ecolisisiwe yesibili i-electrolyzed. ukukhiqiza igesi ye-chlorine ekamelweni le-anode. I-Na+ ku-brine ekamelweni le-anode ingena ekamelweni le-cathode ngolwelwesi lwe-ion futhi i-OH- egunjini le-cathode ikhiqiza i-sodium hydroxide. I-H+ ikhishwa ngokuqondile ku-cathode ukuze ikhiqize igesi ye-hydrogen. Phakathi nenqubo ye-electrolysis, inani elifanele le-high-purity hydrochloric acid lengezwa ekamelweni le-anode ukuze kuncishiswe i-OH-esusiwe, futhi amanzi ahlanzekile adingekayo kufanele afakwe ekamelweni le-cathode. I-high-purity caustic soda ekhiqizwa ekamelweni le-cathode ine-concentration of 30% kuya ku-32% (mass), engasetshenziswa ngokuqondile njengomkhiqizo we-alkali owuketshezi, noma ingagxiliswa ngokwengeziwe ukuze kukhiqizwe umkhiqizo oqinile we-caustic soda.

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Isikhathi sokuthumela: Jul-12-2024