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Separation and recovery of cobalt catalyst from wastewater of PTA unit

Sajadi, S. A. A ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1515/REVIC.2009.29.3.171
  3. Abstract:
  4. The goal of this work is separation and recovery of catalyst residue in wastewater and byproducts of PTA (poly terephetalic acid) unit. Catalyst recovery consists in separating the maximum amount of catalyst and changing the same into valuable compounds. The PTA unit uses cobalt catalyst for oxidation reactions. The byproducts, which contain catalyst, were burned. In the case of metal oxide recovery in the ashes of waste materials, we could solve the problem of the Petrochemical Company. This new method may help us to recover catalyst from wastewater in PTA unit, after which small amounts of ions may be absorbed on a column filled with special absorbent, in such a way that the wastewater leaving the column should contain no heavy metal ion. This method is both economical and may solve the environmental problems. In this method and under special pH conditions and time, it is possible to convert cobalt ion to cobalt-hydroxide precipite, after which the same may be changed into cobalt-acetate that can be used again as starting catalyst. An important result of such work is finding the exact conditions for recovery of this metal ion from wastewater
  5. Keywords:
  6. Catalyst ; Cobalt acetate ; Environment ; Pollution ; Recovery ; Separation ; Terephthalic acid
  7. Source: Reviews in Inorganic Chemistry ; Volume 29, Issue 3 , 2009 , Pages 171-179 ; 01934929 (ISSN)
  8. URL: https://www.degruyter.com/view/j/revic.2009.29.3/revic.2009.29.3.171/revic.2009.29.3.171.xml