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2 368 593

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IPC

C07C1/24(2006-01-01)

C07C7/148(2006-01-01)

C07C11/09(2006-01-01)

(21) (22)

Application

2008118929/04, 2008-05-13

(24)

Start date

2008-05-13

(22)

Actual filing date

2008-05-13

(45)

Published

2009-09-27

(72)

Inventor

Busygin Vladimir MikhajlovichGil'Manov Khamit KhamisovichKuz'Min Vjacheslav Zinov'EvichSafin Damir KhasanovichNesterov Oleg NikolaevichGavrikov Viktor NikolaevichKajumov Amin RavilovichShepelin Vladimir AleksandrovichSafarova Irina Il'Gisovna

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo

METHOD OF EXTRACTING ISOBUTYLENE Russian patent published in 2009 - IPC C07C1/24 C07C7/148 C07C11/09

Abstract RU 2368593 C1

FIELD: chemistry.

SUBSTANCE: invention relates to a method of extracting isobutylene from an isobutylene containing fraction through hydration of the isobutylene containing fraction, obtaining a tert-butanol containing fraction and its subsequent dehydration. The method is characterised by that, dehydration is done in two stages. At the first stage, temperature is kept at 90-120°C and pressure at 1-3 kgf/cm² and concentrated isobutylene and an aqueous solution of tert-butyl and sec-butyl alcohol are extracted, from which concentrated sec-butyl alcohol and an isobutylene containing fraction, which is taken for hydration, are extracted at the second stage. Process at the second stage is carried out at temperature 100-130°C and pressure 2-6 kgf/cm².

EFFECT: use of the given method allows for extracting isobutylene without butene or butadiene impurities, and reduction of tert-butyl alcohol loss.

1 cl, 1 tbl, 8 ex, 1 dwg

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RU 2 368 593 C1

Authors

Busygin Vladimir Mikhajlovich

Gil'Manov Khamit Khamisovich

Kuz'Min Vjacheslav Zinov'Evich

Safin Damir Khasanovich

Nesterov Oleg Nikolaevich

Gavrikov Viktor Nikolaevich

Kajumov Amin Ravilovich

Shepelin Vladimir Aleksandrovich

Safarova Irina Il'Gisovna

Dates

2009-09-27—Published

2008-05-13—Filed