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2 082 716

(13)

C1

(51)

IPC

(21) (22)

Application

93040900/04, 1993-08-10

(22)

Actual filing date

1993-08-10

(45)

Published

1997-06-27

(72)

Inventor

Baltina L.A.Serdjuk N.G.Krasnova L.V.Tolstikov G.A.

(73)

Holder

Institut Organicheskoj Khimii Ural'Skogo Otdelenija Ran

METHOD OF GLYCYRRHIZIC ACID PRODUCING Russian patent published in 1997 - IPC

Abstract RU 2082716 C1

FIELD: pharmacy technology. SUBSTANCE: glycyrrhizic acid is obtained from the technical licorice dry extract at glycyrrhizic acid content 26-28%. The parent extract is extracted with acetone containing 0.1% of sulfuric acid at room temperature and the obtained glycoside tripotassium salt is converted to monopotassium salt by its recrystallization from an aqueous ethanol twice at ratio = 5:1, vol./vol. followed by treatment of monopotassium salt with 1% sulfuric acid solution at 98-100 C and chloroform at room temperature to obtain glycyrrhizic acid. Obtained finely crystalline precipitate of glycyrrhizic acid contains 87-89% basic substance. Product is used in medicine. EFFECT: improved method of producing. 3 dwg

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RU 2 082 716 C1

Authors

Baltina L.A.

Serdjuk N.G.

Krasnova L.V.

Tolstikov G.A.

Dates

1997-06-27—Published

1993-08-10—Filed

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