Terephthalic acid process

Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge

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204 72, 204263, 260515P, C25B 300, C07C 5108, C07C 6326, C07C 6328

Patent

active

040935280

ABSTRACT:
A process for the preparation of terephthalic acid which comprises electrolyzing disodium terephthalate in the anode compartment of an electrolytic cell whereby terephthalic acid product is precipitated and subsequently separated. In a preferred embodiment the disodium terephthalate is obtained by the aqueous hydrolysis of terephthalonitrile in the presence of a stoichiometric excess of sodium hydroxide.

REFERENCES:
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patent: 3113964 (1963-12-01), Farkas et al.
patent: 3393220 (1968-07-01), Winnick et al.
patent: 3411998 (1968-11-01), Wallman et al.
patent: 3781343 (1973-12-01), Norton
patent: 3849243 (1974-11-01), Grot
patent: 3968017 (1976-07-01), Canata et al.
patent: 3968017 (1976-07-01), Canata et al.
Basic Principles Organic Chemistry by Roberts et al., p. 558, pub. by Benjamin, New York 1965.

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