【作者】 董学芝； 艾天召； 蒋智敏；

【Author】 Xuezhi Dong, Tianzhao Ai, Zhimin Jiang Department of Chemistry Henan University, Kaifeng, 475001

【机构】 河南大学化学化工学院；

【Abstract】 An improved method of recovering chemicals from black liquor generated in an alkaline pulping process is reported in this paper. In the method,through some improvements, the presence of the waste residue (lime mud) is avoided so that the calcining and other recovery methods of the waste residue (lime mud) from the typical chemical recovery process are unnecessary. The soda liquor (or white liquor) and precipitated calcium carbonate that can be used in papermaking and other industries are all produced directly.更多还原