iindaba

Zimbini iindlela zoshishino zokuvelisai-caustic soda: i-causticization kunye ne-electrolysis. Indlela ye-causticization yahlulwe kwindlela ye-soda ash causticization kunye nendlela yendalo ye-alkali ye-causticization ngokwezixhobo ezahlukeneyo zekrwada; Indlela ye-electrolysis inokwahlulwa ibe yi-diaphragm electrolysis method kunye ne-ion exchange exchange membrane method.
Indlela yeSoda ash causticization: Uthuthu lwesoda kunye nekalika ziguqulwa zibe sisinyibiliko sothuthu lwesoda kwaye uthuthu luguqulwa lube lubisi lwekalika ngokulandelelanayo. Ukusabela kwe-causticization kwenziwa kwi-99-101 ℃. Ulwelo lwe-causticization luyacaciswa, lube ngumphunga kwaye lugxininiswe ngaphezu kwe-40%. Ulwelo lwesoda ye-caustic. Ulwelo olugxininisiweyo lugxininiswe ngakumbi kwaye luqiniswe ukuze kufumaneke imveliso yesoda eqinileyo yecaustic. Udaka lwe-causticizing luhlanjwa ngamanzi, kwaye amanzi okuhlamba asetyenziselwa ukuguqula i-alkali.
Indlela ye-Trona causticization: i-trona iyatyunyuzwa, inyibilika (okanye i-alkali halogen), icaciswe, kwaye emva koko ubisi lwekalika lufakwe kwi-causticize kwi-95 ukuya kwi-100 ° C. I-causticized liquid icaciswa, i-evaporated, kwaye igxininiswe kwi-concentration ye-NaOH malunga ne-46%, kwaye i-liquid ecacileyo ipholile. , ukuna kwetyuwa kunye nokubilisa ngakumbi ukuze kugxininiswe ukufumana imveliso egqityiweyo yesoda ye-caustic. Udaka lwe-causticized luhlanjwa ngamanzi, kwaye amanzi okuhlamba asetyenziselwa ukunyibilikisa i-trona.
Indlela ye-Diaphragm electrolysis: yongeza i-soda ash, i-caustic soda, kunye ne-barium chloride concentrate ukususa ukungcola okufana ne-calcium, i-magnesium, kunye ne-sulfate ions emva kwetyuwa yokuqala enetyuwa, uze wongeze i-polyacrylate ye-sodium okanye i-causticized bran kwitanki yokucacisa ukukhawulezisa imvula, kwaye ukuhluzwa kwesanti Emva koko, i-hydrochloric acid yongezwa ukuze i-neutralization. I-brine ishushu kwaye ithunyelwa kwi-electrolysis. I-electrolyte ifudunyezwa ngaphambili, ikhutshwe ibe ngumphunga, yohlulwe ibe ziityuwa, ize ipholiswe ukufumana i-liquid caustic soda, ethi igxininiswe ngakumbi ukufumana imveliso egqityiweyo yesoda eqinileyo ye-caustic. Amanzi okuhlamba ngodaka asetyenziselwa ukunyibilikisa ityuwa.
Indlela ye-Ion yokutshintshiselana nge-membrane: Emva kokuba ityuwa yokuqala iguqulwe ibe yityuwa, i-brine iyacocwa ngokwendlela yendabuko. Emva kokuba i-brine yokuqala ihluzwe nge-microporous sintered carbon tubular filter, iphinda icocwe kwakhona nge-chelating ion exchange resin tower ukwenza Xa umxholo we-calcium kunye ne-magnesium kwibrine yehla ngaphantsi kwe-0. 002%, i-brine esulungekisiweyo yesibini i-electrolyzed. ukuvelisa igesi yeklorini kwigumbi le anode. I-Na + kwi-brine kwigumbi le-anode ingena kwigumbi le-cathode nge-membrane ye-ion kwaye i-OH-kwigumbi le-cathode yenza i-sodium hydroxide. I-H + ikhutshwa ngokuthe ngqo kwi-cathode ukuvelisa igesi ye-hydrogen. Ngethuba lenkqubo ye-electrolysis, umlinganiselo ofanelekileyo we-high-purity hydrochloric acid yongezwa kwigumbi le-anode ukuze unciphise i-OH-esusiweyo, kwaye amanzi acocekileyo afunekayo kufuneka afakwe kwigumbi le-cathode. I-high-purity caustic soda eyenziwa kwigumbi le-cathode ine-concentration ye-30% ukuya kwi-32% (ubunzima), enokusetyenziswa ngokuthe ngqo njengemveliso ye-alkali engamanzi, okanye inokugxininiswa ngakumbi ukuvelisa imveliso yesoda ye-soda.