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RU

(11)

2 654 863

(13)

C1

(51)

IPC

C07C11/18(2006-01-01)

C07C5/333(2006-01-01)

(21) (22)

Application

2017133578, 2017-09-26

(24)

Start date

2017-09-26

(22)

Actual filing date

2017-09-26

(45)

Published

2018-05-23

(72)

Inventor

Gilmullin Rinat RaisovichZajtsev Sergej MikhajlovichBerezkina Marina Vasilevna

(73)

Holder

Publichnoe Aktsionernoe Obshchestvo

METHOD OF PRODUCING ISOPRENE Russian patent published in 2018 - IPC C07C11/18 C07C5/333 

Abstract RU 2654863 C1

FIELD: technological processes.

SUBSTANCE: invention relates to a process for the preparation of isoprene by the two-step dehydrogenation of isopentane in the presence of an aluminum chromium catalyst in the first stage of dehydrogenation. Process is characterized that a mixture of isopentane and a side furan-containing amylene fraction is formed in the first dehydrogenation step, resulting from the separation of isoprene from fraction C5 pyrolysis, in a weight ratio of 30–80:1, when the content of furan in the mixture is not more than 0.005 % by weight.

EFFECT: use of the present invention makes it possible to expand the feedstock for obtaining isoprene by a two-stage dehydrogenation using as feed a mixture of isopentane obtained by any of the known methods, and the secondary furan-containing amylenic fraction resulting from the isolation of isoprene from fraction C5 pyrolysis.

1 cl, 4 tbl, 4 ex

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RU 2 654 863 C1

Authors

Gilmullin Rinat Raisovich

Zajtsev Sergej Mikhajlovich

Berezkina Marina Vasilevna

Dates

2018-05-23—Published

2017-09-26—Filed

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