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2 314 301

(13)

(51)

IPC

C07D307/89(2006-01-01)

C07C51/265(2006-01-01)

C07C63/331(2006-01-01)

(21) (22)

Application

2004124881/04, 2004-08-16

(24)

Start date

2004-08-16

(22)

Actual filing date

2004-08-16

(45)

Published

2008-01-10

(72)

Inventor

Nazimok Vladimir FilippovichGoncharova Nadezhda NikolaevnaTarkhanov Gennadij Anatol'EvichNazimok Ekaterina NikolaevnaKudashov Aleksandr Anatol'Evich

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju I Proizvodstvennyj Tsentr

METHOD OF PRODUCING AND CLEANING PYROMELLITIC ANHYDRITE Russian patent published in 2008 - IPC C07D307/89 C07C51/265 C07C63/331

Abstract RU 2314301 C2

FIELD: chemical engineering.

SUBSTANCE: method comprises step-by-step oxidizing of durol up to pyromellitic acid by oxygen in acetic acid environment at high temperature and pressure in the presence of salts of heavy metals and haloid compositions and subsequent cleaning the solution produced by means of hot filtering and solidification.

EFFECT: improved method.

2 dwg, 2 tbl, 18 ex

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RU 2 314 301 C2

Authors

Nazimok Vladimir Filippovich

Goncharova Nadezhda Nikolaevna

Tarkhanov Gennadij Anatol'Evich

Nazimok Ekaterina Nikolaevna

Kudashov Aleksandr Anatol'Evich

Dates

2008-01-10—Published

2004-08-16—Filed