EP0142725A1
Expired / Lapsed
EP
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Process for producing gluconic acid
Assignee: Kawaken Fine Chemicals Co Ltd
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Filing: 1984-10-19
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Granted: —
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Expires: 2004-10-19
Abstract
Abstract Gluconic acid is produced by oxidizing glucose with an oxygen-containing gas in an aqueous alkali solution in the presence of a palladium-bismuth/carbon catalyst which has adsorbed firstly bismuth and secondly palladium. The catalyst has an improved activity, selectivity and durability.
Inventors
- 👤 Hisashi Saito
- 👤 Shinji Ohnaka
- 👤 Shigeo Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 04:02
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/31; C07C51/313
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
53 words
-1-A process for producing gluconic acid by oxidizing glucose with an oxygen-containing gas in an aqueous alkali solution in the presence of a palladium-bismuth/carbon catalyst which has been prepared by making an active carbon adsorb a bismuth compound, then making the bismuth compound-adsorbing carbon adsorb a palladium compound and reducing the resulting carbon.
Claim 2
Dependent Claim
16 words
-2-A process as claimed in Claim 1, in which said active carbon is of fine particles.
Claim 3
Dependent Claim
49 words
-3-A process as claimed in Claim 1, in which said bismuth compound is selected from the group consisting of bismuth trichloride, bismuth trioxide, bismuth oxychloride and bismuth hydroxide nitrate and said palladium compound is selected from the group consisting of palladium chloride, palladium nitrate, palladium oxide and palladium hydroxide.
Claim 4
Dependent Claim
32 words
-4-A process as claimed in Claim 1 or 3, in which said catalyst has carried 0.01 to 20 percent by weight of bismuth and 1 to 10 percent by weight of palladium.
Claim 5
Dependent Claim
32 words
-5-A process as claimed in Claim 1 or 3, in which said catalyst has a peak corresponding to the alloy composition of bismuth and palladium in the X ray diffraction pattern thereof.
References Cited (Backward Citations)
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