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2 082 707

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IPC

(21) (22)

Application

5020953/04, 1991-11-19

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Actual filing date

1991-11-19

(45)

Published

1997-06-27

(72)

Inventor

Kjazimov Sabir Mamedali[Az]Ibragimov Khikmet Dzhamal[Az]Bunijat-Zade Ajdyn Ali[Az]Putnikova Nelli Tovievna[Az]Isaev Khydyr Gaim[Az]Mirzoev Tariel' Magerram[Az]Pilipenko Roman Mikhajlovich[Ru]Egorov Nikolaj Konstantinovich[Ru]Mazalov Jurij Aleksandrovich[Ru]

(73)

Holder

Kjazimov Sabir Mamedali

PROCESS FOR PREPARING LIQUID ALPHA-METHYLSTYRENE DIMERS Russian patent published in 1997 - IPC

Abstract RU 2082707 C1

FIELD: organic chemistry, particularly, dimerization of methylstyrene. SUBSTANCE: process is carried out at 50-200 at atmospheric pressure, in the presence of phosphoric acid catalyst on silicagel. Silicagel is treated by successively applying phosphoric and polyphosphoric acids at orthophosphoric to silicagel weight ratio of 0.42-0.45:1 and polyphosphoric acid to silicophosphate molar ratio of 0.95:1. EFFECT: more efficient preparation process. 4 tbl

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RU 2 082 707 C1

Authors

Kjazimov Sabir Mamedali[Az]

Ibragimov Khikmet Dzhamal[Az]

Bunijat-Zade Ajdyn Ali[Az]

Putnikova Nelli Tovievna[Az]

Isaev Khydyr Gaim[Az]

Mirzoev Tariel' Magerram[Az]

Pilipenko Roman Mikhajlovich[Ru]

Egorov Nikolaj Konstantinovich[Ru]

Mazalov Jurij Aleksandrovich[Ru]

Dates

1997-06-27—Published

1991-11-19—Filed