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2 119 486

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C1

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IPC

(21) (22)

Application

97109423/04, 1997-06-03

(22)

Actual filing date

1997-06-03

(45)

Published

1998-09-27

(72)

Inventor

Kochetkova L.I.Roeva T.M.Serdjuk N.V.Kirsanov A.T.Jashchenko P.G.Zharikov R.D.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo

METHOD OF MEDICINAL ASCORBIC ACID PRODUCING Russian patent published in 1998 - IPC

Abstract RU 2119486 C1

FIELD: chemical technology, vitamins. SUBSTANCE: invention relates to a method of producing medicinal ascorbic acid from solution of technical ascorbic acid by multistep crystallization. Mother liquors formed at medicinal ascorbic acid crystallization are treated preliminary with sodium-containing alkaline compound, for example, NaOH, Na2CO3, NaHCO3, or hydrochloric acid to pH 2.2-2.4. Method ensures to decrease process time by 4-5-fold and diminish product loss by 2-3%. EFFECT: improved method of producing. 2 cl, 6 ex, 1 tbl

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RU 2 119 486 C1

Authors

Kochetkova L.I.

Roeva T.M.

Serdjuk N.V.

Kirsanov A.T.

Jashchenko P.G.

Zharikov R.D.

Dates

1998-09-27—Published

1997-06-03—Filed

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