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Application

98109926/04, 1998-05-25

(24)

Start date

1998-05-25

(22)

Actual filing date

1998-05-25

(45)

Published

1999-09-20

(72)

Inventor

Zakharov V.I.Oleshko P.R.Podobed A.F.Sabylin I.I.Khvorov A.P.

(73)

Holder

Novocherkasskij Zavod Sinteticheskikh Produktov

METHOD FOR ISOLATION OF METHANOL FROM 1,4- BUTINEDIOL SYNTHESIS BY-PRODUCT Russian patent published in 1999 - IPC

Abstract RU 2137746 C1

FIELD: industrial organic synthesis and chemical engineering. SUBSTANCE: invention relates to synthesis of 1,4-butinediol from formaldehyde and acetylene. Rectification of by-product containing methanol, water, and traces of formaldehyde and formic acid is proposed to be carried out on 25-30 theoretical tray column at still pressure 400-1300 mm Hg, still-top pressure difference 100-400 mm Hg, and temperature difference between top and 5-8th tray 25-35 C. Separation agent is used, in particular, saturated and unsaturated aliphatic C3-C5-alcohols (e.g. propanol, butanol, amyl alcohol, propargyl alcohol) at weight ratio of separation agent to formaldehyde plus formic acid from 0.2:1 to 4:1. Desired methanol is isolated at the top of column and aqueous methanol with formic acid and separation agent admixture at the bottom. EFFECT: improved purity of 1,4-butinediol and reduced power consumption. 13 ex

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RU 2 137 746 C1

Authors

Zakharov V.I.

Oleshko P.R.

Podobed A.F.

Sabylin I.I.

Khvorov A.P.

Dates

1999-09-20—Published

1998-05-25—Filed

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