Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1995-10-31
1996-09-17
Barts, Samuel
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
562414, 562486, C07C 51265
Patent
active
055570097
ABSTRACT:
A process for preparing an aqueous slurry of terephthalic acid, which comprises oxidizing p-xylene with molecular oxygen in a liquid phase in an acetic acid solvent in the presence of a catalyst, to obtain an acetic acid slurry of terephthalic acid, separating terephthalic acid crystals from the acetic acid slurry, washing the terephthalic acid crystals containing acetic acid, with p-xylene or an acetic acid ester, and then mixing water thereto.
REFERENCES:
patent: 4081464 (1978-03-01), Marsh et al.
patent: 5008450 (1991-04-01), Yamamoto et al.
patent: 5200557 (1993-04-01), Gee et al.
Isogai Takayuki
Izumisawa Yoshiaki
Sumi Yoshiyuki
Barts Samuel
Mitsubishi Chemical Corporation
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