Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1978-11-17
1980-07-08
Siegel, Alan
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C07C 5133
Patent
active
042118816
ABSTRACT:
This invention relates to the neat air oxidation of liquid o-xylene in a continuous manner in a single step to overcome the limited conversion of the process of British Patent Specification No. 856,245 or of the process of U.S. Pat. No. 3,920,735. More specifically this invention overcomes the limited conversion of o-xylene by its single step air oxidation in the presence of catalysis provided by ions of cobalt, manganese and bromine not only by maintaining the proper relationship of temperature, pressure and free water concentration in the reaction mixture to minimize the conversion of o-phthalic acid to its intramolecular anhydride but also by conducting the oxidation in the presence of small amounts of acetic or benzoic acid to make miscible the otherwise immiscible liquid phases of liquid o-xylene and liquid o-phthalic acid containing components of catalysis and free liquid water.
REFERENCES:
patent: 2858334 (1958-10-01), Landau
patent: 3920735 (1975-11-01), Wampfler
Bemis Alan G.
Horsfield Sydney G.
Kuhlmann George E.
Ahlers Fred R.
Magidson William H.
McClain William T.
Siegel Alan
Standard Oil Company (Indiana)
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