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2 138 473

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Application

97108418/04, 1997-05-20

(22)

Actual filing date

1997-05-20

(45)

Published

1999-09-27

(72)

Inventor

Gogotov A.F.Zakazov A.N.Sajbel' L.I.Vojtik V.S.Babikov A.F.Amosov V.V.Cherepanov V.I.Kozlov N.A.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Zavod Polimerov"

STYRENE THERMOPOLYMERIZATION INHIBITION METHOD Russian patent published in 1999 - IPC

Abstract RU 2138473 C1

FIELD: industrial organic synthesis. SUBSTANCE: when distilling styrene from reaction mixture, dioxyme-quinone styrene-polymerization inhibitor is used in combination with vanillin-barbiturate additive in amount 0.5-1.5 weight parts for 1 weight part of dioxyme-quinone at total consumption of composition 0.0250-0.0521% based on the weight of styrene, dioxyme-quinone being added to heated styrene 2 hr after addition of primary inhibitor and start of heating. EFFECT: increased up to one a and half % yield of commercial styrene. 4 cl, 1 tbl, 16 ex

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RU 2 138 473 C1

Authors

Gogotov A.F.

Zakazov A.N.

Sajbel' L.I.

Vojtik V.S.

Babikov A.F.

Amosov V.V.

Cherepanov V.I.

Kozlov N.A.

Dates

1999-09-27—Published

1997-05-20—Filed

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