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2 078 073

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IPC

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Application

95102634/04, 1995-02-22

(22)

Actual filing date

1995-02-22

(45)

Published

1997-04-27

(72)

Inventor

Zagidullin S.Kh.Mosheva L.A.Majer V.V.Ozhegov V.I.Kozhukhov E.E.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa

METHOD FOR PRODUCTION OF PENTAERYTRITOL Russian patent published in 1997 - IPC

Abstract RU 2078073 C1

FIELD: organic synthesis. SUBSTANCE: proposed method involves interaction of acetaldehyde and formaldehyde which takes place in the presence of sodium hydroxide, rectification and evaporation of reaction solution, two-stepped crystallization, filtration, washing and drying of desired pentaerytritol. Said crystallization is carried out by preliminary adiabatic cooling of evaporated solution under vacuum at residual pressure 28-30 kPa to 55-75 C, the process takes place within 15-30 min it is followed by additional cooling under atmospheric pressure within 40-80 min. EFFECT: improved efficiency of the method. 1 tbl

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RU 2 078 073 C1

Authors

Zagidullin S.Kh.

Mosheva L.A.

Majer V.V.

Ozhegov V.I.

Kozhukhov E.E.

Dates

1997-04-27—Published

1995-02-22—Filed

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