Feasibility Study of Economically Recovery of Residue from Terephthalic Acid Production Unit in the Tondgooyan Petrochemical Company

Rezaei, Vahid | 2013

557 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44603 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Sajadi, Ali Akbar; Matloubi Moghaddam, Firouz
  7. Abstract:
  8. In this work we intend toeconomically recovery of residual from terephthalic acid production unit in the Tondgooyan petrochemical company. Major component of this residual is catalysts, benzoic acid and amount of terephthalic acid product. Catalysts contains of cobalt, manganese and bromide which recycled by water extraction. Effective variable on extraction process is dilution ratio of water to residue, extraction temperature and time. Optimum condition of catalystsrecovery consist of dilution ratio of water to residue 6:1, extraction temperature and time is 45 C° and 40 minrespectively. Recovery yield of cobalt, manganese and bromide in this optimum condition is 91.21, 91.89 and 92.53 percentrespectively. The benzoic acid recovered by recrystallization in water. Effective variable on recrystalization process is dilution ratio of water to moist cake, dissolve and crystallization temperature of benzoic acid in water. The Optimum conditionof benzoic acid recovery consist of dilution ratio of water to moist cake 4:1, dissolve and crystallization temperature is 95 and 25 C°respectively. Recovery yield of benzoic acid is 85 percent. Purity of recovered crystals of benzoic acid is 97.79 percent. After separation of catalyst components and benzoic acid from residue whatremind is crude terephthalic acid content of residue and can recycling to terephthalic acid purification unit
  9. Keywords:
  10. Catalyst ; Recycling ; Recrystallization ; Terephthalic Acid ; Benzoic Acid ; Extraction

 Digital Object List