【摘要】 利用钾长石粉为原料合成13X沸石后的母液,经CO2酸化后除去SiO2-3,得NaHCO3-KHCO3-H2O体系;结晶分离可以制备优级纯Na2CO3,余液经除杂,再次酸化得KHCO3结晶,干燥后制备出K2CO3。测试结果表明,碳酸钾产品达到GB/T1587-2000Ⅱ型技术要求。实验证明了利用合成沸石母液提取电子级碳酸钾的可行性,其中碳酸钠回收率达到79.8%,碳酸钾回收率达到83.0%。更多还原

【Abstract】 A technological method for preparation of electronic-grade potassium carbonateusing pregnant liquor produced during the synthesis of zeolite was briefly described in this paper. Using feldspar as a raw material for synthesis of 13X zeolite, the pregnant liquor collected was acidulated by CO₂ for removal of SO^2-₃. The NaHCO₃-KHCO₃-H₂O system was gained, and the superior-grade sodium carbonate was produced from this system by crystallization. The remaining solution was purified and acidulated again. The KHCO₃ obtained was calcined to produce potassium carbonate. The product is up to GB/T1587-2000Ⅱ. The recovery of Na₂CO₃ is 79.8% and the recovery of K₂CO₃ is 83.0%.更多还原