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IPC

(21) (22)

Application

3871735/04, 1985-01-02

(22)

Actual filing date

1985-01-02

(45)

Published

1995-05-20

(72)

Inventor

Lemaev N.V.Galiev R.G.Serebrjakov B.R.Gizzatullin R.R.Petukhov A.A.Zakirova M.F.Komarov V.A.Kovalenko V.V.Matrosov N.I.Saljamov D.S.Vasil'Ev I.M.Salamov R.

METHOD OF STYRENE SYNTHESIS Russian patent published in 1995 - IPC

Abstract SU 1309518 A1

FIELD: chemical technology, petroleum-chemical processes. SUBSTANCE: styrene is synthesized by steam-phase dehydration of methylphenylcarbinol fraction containing 28.1% acetophenone in two-step adiabatic reactor in the presence of steam and catalyst with intermediate heating of contact gas. Method involves the recovery of resin formed to dehydration process. The same resins (0.6-3.0 wt.-%) were added to the parental methylphenylcarbinol fraction purified of resins before dehydration. Resins show the following composition, wt. -%: ethylbenzene 2.1; styrene 0.08; α-methylstyrene 0.25; benzaldehyde 19.6; methylphenylcarbinol 5.56, and high-boiling impurities - the rest. Resins added at concentration above 3 wt.-% do not increase styrene yield. Dehydration is carried out at 320 C. As a result of resin processing the styrene yield is increased by 3.4%. EFFECT: increased yield of styrene. 5 tbl

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SU 1 309 518 A1

Authors

Lemaev N.V.

Galiev R.G.

Serebrjakov B.R.

Gizzatullin R.R.

Petukhov A.A.

Zakirova M.F.

Komarov V.A.

Kovalenko V.V.

Matrosov N.I.

Saljamov D.S.

Vasil'Ev I.M.

Salamov R.

Dates

1995-05-20—Published

1985-01-02—Filed