天然石膏;硫酸铵;碳酸钙;氯化钙;清洁生产," /> 天然石膏;硫酸铵;碳酸钙;氯化钙;清洁生产,"/> natural gpsumammonium sulphatecalcium carbonatecalcium chlorideclean production,"/> 用天然石膏制备硫酸铵和氯化钙的工艺研究
无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2011, Vol. 43 ›› Issue (1): 40-42.

• 论文 • 上一篇    下一篇

用天然石膏制备硫酸铵和氯化钙的工艺研究

 杨荣华 ,  高德力   

  1. (泰山医学院化学与化学工程学院,山东泰安 271016
  • 出版日期:2011-01-10 发布日期:2011-03-17

Production process of ammonium sulphate and calcium chloride from natural gypsum

 YANG  Rong-Hua- ,   Gao-De-Li   

  1. (School of Chemistry Chemical Engineering,Taishan Medical College,Taian 271016,China)
  • Published:2011-01-10 Online:2011-03-17

摘要: 以天然石膏和碳酸氢铵为原料进行复分解反应制备硫酸铵,副产碳酸钙粗品。考察了反应温度、反应时间、配料比、液固比等因素对硫酸钙转化率的影响,通过正交实验确定了复分解反应的最佳工艺条件。探讨副产物碳酸钙的回收利用方法,用盐酸处理碳酸钙粗品制备氯化钙,研究确定了工艺条件。整个生产过程无废渣排放,工艺简单清洁。通过本方法,可将天然石膏转化为具有更高价值的硫酸铵和氯化钙,研制的产品质量达到有关标准,应用前景广阔。

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Abstract: Ammonium sulphate and by-product crude calcium carbonate were prepared by double decomposition reaction with natural gypsum and ammonium bicarbonate as raw materials.Influences of the factors,such as reaction temperature,reaction time,mix ratio,and liquid-solid ratio,on conversion rate of calcium sulphate were discussed,and the optimum technological conditions of double decomposition reaction were determined by orthogonal experiment.Recycling method of by-product calcium carbonate was discussed.Calcium chloride can be obtained by the reaction of hydrochloric acid and crude calcium carbonate,meanwhile the technological conditions of this reaction were also determined.Total production process had no waste residue discharge and the process was simple and clean.Through this method,natural gypsum can be converted to ammonium sulfate and calcium chloride with higher value,the quality of the obtained products reach the corresponding chemical standards and the application prospect of the products is much wide. 

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