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2 129 126

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IPC

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Application

96109728/04, 1996-05-14

(22)

Actual filing date

1996-05-14

(45)

Published

1999-04-20

(72)

Inventor

Dobrovinskij V.E.Komarov S.M.Sal'Nikov S.B.Bespalov V.P.Andreev V.A.

(73)

Holder

Aktsionernoe Obshchestvo Nauchno-Proizvodstvennoe Predprijatie

METHOD OF ISOLATION OF POLYMERS Russian patent published in 1999 - IPC

Abstract RU 2129126 C1

FIELD: rubber industry. SUBSTANCE: method is suitable in production of synthetic rubbers via solution polymerization and consists in mixing of polymer with steam and hot recycle water in crumb-former to form pulp after which pulp is degassed in two steps with intermediate concentration after each step. When pulp is concentrated after the first degassing step, concentrated pulp receives live steam in amount sufficient to maintain temperature condition of the second degassing step. Before concentrating the pulp after the second degassing step, water is replaced by water after the second concentration step and water which is withdrawn is fed into mixing process. EFFECT: increased efficiency in utilization of steam and reduced residual content of solvent in polymer. 1 dwg, 1 tbl, 2 ex

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RU 2 129 126 C1

Authors

Dobrovinskij V.E.

Komarov S.M.

Sal'Nikov S.B.

Bespalov V.P.

Andreev V.A.

Dates

1999-04-20—Published

1996-05-14—Filed

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