无机盐工业

无机盐工业 ›› 2020, Vol. 52 ›› Issue (8): 76-77.doi: 10.11962/1006-4990.2019-0494

• 环境·健康·安全 • 上一篇    下一篇

活性生物猪骨炭纯化盐湖工业氯化钾

李海朝(),纪青松,张净净,杨斯乔   

  1. 青海民族大学化学化工学院,青海西宁 810007
  • 收稿日期:2020-02-20 出版日期:2020-08-10 发布日期:2020-08-12
  • 作者简介:李海朝(1973-),男,博士,教授,硕士研究生导师,主要从事应用化学领域研究。青海省化学会委员,青海省级高等学校青年骨干教师,省级自然科学化学工程学科带头人。现任青海民族大学化学化工学院副院长,负责学院科研、学科建设和研究生工作。主持国家自然科学基金、省部级科研项目等科研课题多项。已发表论文41篇,专利参与11项;E-mail:lihaichao@vip.163.com
  • 基金资助:
    青海省自然科学基金(2019-ZJ-928)

Purification of industrial potassium chloride from salt lake by activated pig bone biochar

Li Haichao(),Ji Qingsong,Zhang Jingjing,Yang Siqiao   

  1. College of Chemistry and Chemical Engineering,Qinghai Nationalities University,Xining 810007,China
  • Received:2020-02-20 Online:2020-08-10 Published:2020-08-12

摘要:

生产食品级和药用氯化钾主要采用工业级产品通过进一步纯化的方法制备得到。盐湖工业氯化钾制备方法是采用浮选剂进行浮选制备,因此存在浮选剂残留和部分重金属超标的情况。经测定所用盐湖工业氯化钾样品中,铵和铅的质量分数分别为1.698×10-4和1.63×10-5。为了制备食品级氯化钾,采用猪骨为原料,以磷酸为活化剂制备得到了比表面积为147.26 m2/g、碘吸附值为297.5 mg/g的活性生物猪骨炭,实验结果表明,用10 g的活性猪骨炭和商品炭分别对1 L的氯化钾溶液做吸附处理,活性猪骨炭吸附后溶液中各离子含量均符合GB 25585—2010《食品添加剂 氯化钾》的要求,成功制备了食品级氯化钾。

关键词: 氯化钾, 活性生物炭, 吸附, 盐湖, 猪骨

Abstract:

Food grade and medicinal potassium chloride are mainly prepared by further purification of industrial grade potassium chloride products.The industrial potassium chloride from salt lake is prepared by flotation agent,so there are some problems of residual flotation agent and some heavy metals exceeding the standard.By determination of industrial potassium chloride samples from salt lake,the mass fractions of ammonium and lead are 1.698×10-4 and 1.63×10-5.In order to prepare food grade potassium chloride,the activated biochar with the specific surface area of 147.26 m2/g and the iodine adsorption value of 297.5 mg/g was prepared by using pig bone as raw material and phosphoric acid as activator.Then,1 L potassium chloride solution was adsorbed by 10 g activated pig bone biochar and commercial carbon,respectively.Results showed that after the adsorption of activated pig bone biochar,the contents of all ions in the solution met the requirement of Food Additive Potassium Chloride,GB 25585—2010,and food grade potassium chloride was prepared successfully.

Key words: potassium chloride, activated biochar, adsorption, salt lake, pig bone

中图分类号: