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(19)

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(11)

1 811 155

(13)

A1

(51)

IPC

(21) (22)

Application

4786271/04, 1990-01-24

(22)

Actual filing date

1990-01-24

(45)

Published

1995-09-20

(72)

Inventor

Pavlov S.Ju.Gorshkov V.A.Churkin V.N.Smirnov V.A.Titova L.F.Kazakov V.P.Andreev V.A.Bytina V.I.

PROCESS FOR PREPARING ISOPRENE Russian patent published in 1995 - IPC

Abstract SU 1811155 A1

FIELD: a product for the production of synthetic rubber. SUBSTANCE: Reagent 1: isobutylene-containing stock. Reagent 2: an aqueous solution of formaldehyde. Reaction conditions: the process is carried out to obtain an isobutylene conversion to 30-88% at elevated temperature and pressure in the presence of an acid catalyst to obtain methyl dioxane and a methylal-methanol fraction and a fraction of unreacted hydrocarbons is reacted with methanol in the presence of an acid catalyst at 50-150 C to 90-99.5% conversion of isobutylene to subsequently recover methyl tert-butyl ester. EFFECT: more economical process and additional recovery of methyl tert-butyl ester. 1 tbl

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SU 1 811 155 A1

Authors

Pavlov S.Ju.

Gorshkov V.A.

Churkin V.N.

Smirnov V.A.

Titova L.F.

Kazakov V.P.

Andreev V.A.

Bytina V.I.

Dates

1995-09-20—Published

1990-01-24—Filed

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