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2 080 923

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C1

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IPC

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Application

95108020/04, 1995-05-22

(22)

Actual filing date

1995-05-22

(45)

Published

1997-06-10

(72)

Inventor

Maksimov G.M.Molchanov V.V.Gojdin V.V.Timofeeva M.N.Maksimovskaja R.I.

(73)

Holder

Institut Kataliza Im.G.K.Boreskova So Ran

CATALYST FOR PREPARING 2,3:4,6-DIISOPPROPYLIDENE-ALPHA-L- -SORBOFURANOSE AND PROCESS FOR PREPARING THE SAME Russian patent published in 1997 - IPC

Abstract RU 2080923 C1

FIELD: chemical idustry. SUBSTANCE: invention describes preparation of 2,3: 4,6-diisopropylidene-alpha-L-sorbofuranose (vitamic C synthesis semiproduct) by using phosphorus-molybdenum catalyst at Mo:P molar ratio of 3-12. Catalysts are synthesized by dissolving in water or phosphoric acid solution containing phases α (x = 6-24) or P2O5•xMoO3 previously subjected to mechanical and chemical activation at 20-100 C and concentration of original compounds of 5-50 wt.-%. Use of these catalysts makes it possible to increase yield of product up to 90% and solve problem of regeneration of catalysts. EFFECT: improved properties. 4 cl

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RU 2 080 923 C1

Authors

Maksimov G.M.

Molchanov V.V.

Gojdin V.V.

Timofeeva M.N.

Maksimovskaja R.I.

Dates

1997-06-10—Published

1995-05-22—Filed

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