Method for producing crystalline carboxylic acids

Details Method for producing crystalline carboxylic acids Method for producing crystalline carboxylic acids

2005-12-06

2005-12-06

Zucker, Paul A. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

Reexamination Certificate

active

06972342

ABSTRACT:
Improved process for producing purified aromatic carboxylic acid in the form of dried crystals which comprises cooling the crystals in a fluidized state after the drying step to a temperature at or below 100° C. prior to packaging and an apparatus therefor.

REFERENCES:
patent: 654093 (1900-07-01), Emerick
patent: 3629328 (1971-12-01), Stautzenberger et al.
patent: 3661330 (1972-05-01), Yamada et al.
patent: 4231991 (1980-11-01), Muller et al.
patent: 4603220 (1986-07-01), Feld
patent: 6113866 (2000-09-01), Lee et al.
patent: GB-2024810 (1980-01-01), None
patent: 2024810 (1980-01-01), None
patent: 7011482 (1970-12-01), None

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