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5045445/04, 1992-06-02

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Actual filing date

1992-06-02

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Published

1994-10-15

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Inventor

Litvintsev I.Ju.Mitnik Ju.V.Sapunov V.N.Koshel' G.N.Krestinina T.B.Lebedeva N.V.Gol'Dberg Ju.M.Uritskij M.I.Mashin V.N.

(73)

Holder

Aktsionernoe Obshchestvo Zakrytogo Tipa Gruppa Vnedrenija"

METHOD OF SYNTHESIS OF P-HYDROXYBENZOIC ACID Russian patent published in 1994 - IPC

Abstract RU 2021250 C1

FIELD: chemical technology. SUBSTANCE: product - p-hydroxybenzoic acid, empirical formula is C7H6O3, m. p. is 214-215 C. Reagent 1: p-cresol. Reagent 2: acetic anhydride. Reaction conditions: in the presence of acid catalyst following by oxidation of semiproduct prepared in the mixture of acetic acid-acetic anhydride at 100-110 C in the presence of cobalt salt or alkaline metal bromide but preferably with zirconyl salt at the molar ratio of Co: alkaline metal bromide:zirconyl salt = 1:0.3-3:(0.005-0.02). EFFECT: improved method of synthesis. 1 tbl

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RU 2 021 250 C1

Authors

Litvintsev I.Ju.

Mitnik Ju.V.

Sapunov V.N.

Koshel' G.N.

Krestinina T.B.

Lebedeva N.V.

Gol'Dberg Ju.M.

Uritskij M.I.

Mashin V.N.

Dates

1994-10-15—Published

1992-06-02—Filed

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