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1 363 755

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A1

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Application

4066869/04, 1986-05-13

(22)

Actual filing date

1986-05-13

(45)

Published

1994-02-15

(72)

Inventor

Radzinskij S.A.Kljatskin M.M.Amerik V.V.Gur'Janova V.V.Prudskova T.N.Pavlov A.V.

METHOD OF TERE- OR ISOPHTHALIC ACID ESTERS SYNTHESIS Russian patent published in 1994 - IPC

Abstract SU 1363755 A1

FIELD: organic chemistry, esters of aromatic acids. SUBSTANCE: synthesis is carried out from bis-phenol of the general formula C(CH3)2(R)2, where R - ; - H, Br and NaOH in water following by condensation with tere- or isophthalic acid chloroanhydride in the medium of organic solvent. Molar ratio of bis-phenol: NaOH: water = = 1: 1: (8,4-12,9). Process is carried out at 75-85 C up to preparing of homogeneous solution. After cooling of latter condensation in suspension of acid chloroanhydrides is carried out. Time of process is shortened by 2-15-times without sewage formation. Conversion of bis-phenol is increased by 3,4-8,2% . EFFECT: intensification of process, enhanced conversion of bis-phenol. 1 tbl

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SU 1 363 755 A1

Authors

Radzinskij S.A.

Kljatskin M.M.

Amerik V.V.

Gur'Janova V.V.

Prudskova T.N.

Pavlov A.V.

Dates

1994-02-15—Published

1986-05-13—Filed

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