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2 147 020

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C1

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IPC

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Application

98104293/04, 1998-02-16

(24)

Start date

1998-02-16

(22)

Actual filing date

1998-02-16

(45)

Published

2000-03-27

(72)

Inventor

Drozdetskij A.G.Radushev A.V.Turbin A.S.Gusev V.Ju.Drozdova S.V.Shekhonina E.G.Chekanova L.G.

(73)

Holder

Institut Tekhnicheskoj Khimii Ural'Skogo Otdelenija RanRossijskij Nauchnyj Tsentr Khimija"

METHOD OF PREPARING ALIPHATIC CARBOXYLIC ACID HYDRAZIDES Russian patent published in 2000 - IPC

Abstract RU 2147020 C1

FIELD: organic synthesis. SUBSTANCE: aliphatic C2-C9-carboxylic acids are heated with hydrazine hydrate at molar ratio 1:(1.3-1.7) at 105-118 C and under inert gas flow. Reaction mixture is then mixed with water at volume ratio 1:(4-5) and cooled to temperature not superior to 20 C. Resultant precipitate is filtered off, washed with water, and dried. EFFECT: improved process safety, achieved organoleptic properties of product with no additional purification, and minimized waste formation. 2 dwg, 1 tbl, 3 ex

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RU 2 147 020 C1

Authors

Drozdetskij A.G.

Radushev A.V.

Turbin A.S.

Gusev V.Ju.

Drozdova S.V.

Shekhonina E.G.

Chekanova L.G.

Dates

2000-03-27—Published

1998-02-16—Filed

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