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Title:
TEREPHTHALIC ACID PRODUCTION
Document Type and Number:
Japanese Patent JP3383438
Kind Code:
B2
Abstract:

PURPOSE: To obtain terephthalic acid without generating the danger of ingnition and generating a by-product and waste gas by directly introducing an oxygen enriched air supply stream into the circulating part of a liquid containing a p-xylene reactant, a solvent, a catalyst and a bromine initiator.
CONSTITUTION: An oxygen enriched air supply stream is introduced into the circulating part of a liquid containing a p-xylene reactant, a solvent, a catalyst and a bromine initiator and oxygen is dissolved in the liquid 21. The supply stream is reacted with the p-xylene reactant in the circulating part and an oxygen-liquid mixture is held to a temp. of 150-200°C and a pressure of 7-14 kg/cm2G for 30-90 min. Then, a terephthalic acid product is recovered from a container.


Inventors:
Jeffrey Paul Kingsley
Anne Kathryn Roby
Lawrence Marvin Ritz
Application Number:
JP26097394A
Publication Date:
March 04, 2003
Filing Date:
October 03, 1994
Export Citation:
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Assignee:
Praxair Technology Incorporated
International Classes:
B01F3/04; B01J19/18; B01J19/20; C07C51/265; C07C51/215; C07C63/26; (IPC1-7): C07C63/26; C07C51/215; C07C63/26
Domestic Patent References:
JP5852243A
JP5874637A
JP4354531A
JP63178833A
JP5141624B1
JP3502458A
Attorney, Agent or Firm:
Motohiro Kurauchi (1 outside)