Environment·Health·Safety

Study on purification of phosphorus waste salt produced by medicine

  • Ningyu Li ,
  • Xiaolei Sun ,
  • Mingjing Zou ,
  • Xiuyun Sun ,
  • Weiqing Han ,
  • Lianjun Wang
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  • 1. Department of Environmental Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China
    2. Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse

Received date: 2020-09-13

  Online published: 2021-03-11

Abstract

With the development of fine chemicals and intermediate products,the amount of various types of by-product waste salts continues to increase.Due to its large volume and difficult to be treated,it has become to be a critical bottleneck that hin-ders the development of the industry.The purification experimental study of phosphorus-containing waste salt produced as by-product of medicine was carried out.According to the generation method and characteristics of waste salt,methanol/ethanol mixed with activated carbon were used to remove organic matter and sodium chloride in waste salt by elution and recrystal-lization.When the volume to mass ratio of eluent to waste salt is 1 mL/g,the volume ratio of eluent methanol to ethanol is 4∶6,and the mass dosage of activated carbon to the waste salt is 0.4%,the organism in the waste salt has been removed effectively.Subsequently,the obtained mixed salt is recrystallized with the purity of phosphate more than 98%,which meets the industrial phosphate standard.The treatment cost of waste salt is about 174.24 RMB/t and 0.61 t of phosphate can be reco-vered by the above purification and recovery process,realizing the reuse of waste salt.

Cite this article

Ningyu Li , Xiaolei Sun , Mingjing Zou , Xiuyun Sun , Weiqing Han , Lianjun Wang . Study on purification of phosphorus waste salt produced by medicine[J]. Inorganic Chemicals Industry, 2021 , 53(3) : 73 -77 . DOI: 10.11962/1006-4990.2020-0204

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