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2 078 083

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C1

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IPC

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Application

95100355/04, 1995-01-11

(22)

Actual filing date

1995-01-11

(45)

Published

1997-04-27

(72)

Inventor

Kochetkova L.I.Chumakov S.I.Gorbach L.A.Kirsanov A.T.Rudenko A.A.Veterkhanov S.R.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa

METHOD OF PREPARING ALKALINE, EARTH-ALKALINE OR TRANSIENT METAL ASCORBATES Russian patent published in 1997 - IPC

Abstract RU 2078083 C1

FIELD: chemical technology, vitamins. SUBSTANCE: purified aqueous solution of ascorbic acid is treated with the corresponding metal carbonate, hydroxide or sulfate in the presence of calcium or barium carbonate or hydroxide followed by concentration to 50-65 wt.-% and the end product is isolated by desalting with water-soluble organic solvent, crystallization and drying. Method involves preparing ascorbates in the presence of stabilizing agents - sodium sulfite or thiosulfate and desalting the end product is carried out with methanol, ethanol, isopropanol or acetone for two stages. At the first step solvents were added up to the complete ascorbate oil and an aqueous-organic phase separation followed by oil separation, and at the second step - before metal ascorbate crystallization onset in organic solvent. EFFECT: increased yield and quality of the end product, decreased time of crystallization process. 5 cl, 1 tbl

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RU 2 078 083 C1

Authors

Kochetkova L.I.

Chumakov S.I.

Gorbach L.A.

Kirsanov A.T.

Rudenko A.A.

Veterkhanov S.R.

Dates

1997-04-27—Published

1995-01-11—Filed

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