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2 126 800

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IPC

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Application

97113738/04, 1997-07-16

(22)

Actual filing date

1997-07-16

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Published

1999-02-27

(72)

Inventor

Zharkov A.S.Belousov A.M.Taber A.M.Taranenko G.S.Kozlova L.M.Antonenko E.N.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo

METHOD OF HANDLING AQUEOUS MOTHER SOLUTION OBTAINED IN ISOLATION OF ASCORBIC ACID Russian patent published in 1999 - IPC

Abstract RU 2126800 C1

FIELD: industrial organic synthesis. SUBSTANCE: mother solution is concentrated by dissolving low-grade ascorbic acid, after which impurities are adsorbed by activated carbon, purified ascorbic acid is isolated and dried in vacuum at 18-50 C. Before concentration stage, mother solution should be advantageously pretreated with activated carbon. Use of aqueous mother as solvent for low-grade ascorbic acid eliminates laborious and power-consuming water evaporation stage as well as stage of regeneration of ethyl alcohol from water-alcohol mother solution. EFFECT: considerably reduced consumption of water and alcohol and improved quality of product. 1 tbl, 4 ex

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RU 2 126 800 C1

Authors

Zharkov A.S.

Belousov A.M.

Taber A.M.

Taranenko G.S.

Kozlova L.M.

Antonenko E.N.

Dates

1999-02-27—Published

1997-07-16—Filed

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