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Method for preparing saccharic acid by low-temperature catalytic oxidation method

A technology of low-temperature catalysis and oxidation, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylate, etc. It can solve the problems of complex and difficult preparation methods of saccharic acid, and achieve high work efficiency and good preparation effect Good, simple preparation process

Inactive Publication Date: 2017-09-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] The existing methods for preparing saccharic acid generally have defects such as relatively complicated and difficult preparation.

Method used

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  • Method for preparing saccharic acid by low-temperature catalytic oxidation method
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Embodiment Construction

[0015] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

[0016] 1. Gluconic acid oxidation reaction

[0017] Table 1. Oxidation results of gluconic acid on Pt and Pd catalysts

[0018]

[0019]

[0020] Numbers in parentheses are metal loadings, e.g. Pt(2)TiO 2 : 2w% Pt content, TiO 2 Carrier. Reaction conditions: 3.0g sodium gluconate, 1.00g of NaOH, H 2 O was used as solvent, the total reaction volume was 50 mL, 1 bar of O 2 Pressure, reaction time was 6 h. GcA: glucaric acid, TarA: diglyceric acid, LA: lactic acid, GlyA: glyceric acid, GloA: glycolic acid, OxA: oxalic acid.

[0021] Table 2. Oxidation results of glucose monoacid over Pt and Pd ...

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Abstract

The invention discloses a method for preparing saccharic acid by a low-temperature catalytic oxidation method. The method comprises the following steps: (1) the mol ratio of a metal catalyst to a reaction substrate ranges from (1 to 200) to (1 to 5000); (2) the operation temperature is 20 DEG C to 150 DEG C; (3) the operation pressure is oxygen pressure of 1 to 50 atmospheric pressure; (4) the mass ratio of the reaction substrate to a solvent ranges from (1 to 100) to (1 to 2); (5) the contact time of the reaction substrate and the catalyst is about 5h to 50h; and (6) a technological process can be an intermittent process or a continuous process. The method disclosed by the invention has the advantages of simple and convenient preparation technology, good preparation effect, high working efficiency and the like.

Description

technical field [0001] The invention relates to a method for preparing saccharic acid by a low-temperature catalytic oxidation method. Background technique [0002] Glucaric acid (tetrahydroxyadipic acid) is a compound that has long been found in plants and mammals. In recent years, glucaric acid was listed as one of the top 12 compounds in a report (Non-Patent Document 1) by the US National Institute of Renewable Energy on the need for high value-added chemicals produced from biomass. In this report, glucaric acid derivatives that can be prepared from glucaric acid are also exemplified as glucaric acid-γ-lactone, glucaric acid-δ-lactone, or glucaric acid dilactone. Lactones such as esters (use expected as a solvent); polyhydroxypolyamides (use expected as a new type of nylon), etc. In addition, this report speculates that nitric acid oxidation reaction of starch or catalytic oxidation reaction in the presence of alkaline bleaching agent can be utilized as a known producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/235C07C59/285C07C59/245B01J23/42B01J23/44B01J23/63B01J23/89
CPCB01J23/42B01J23/44B01J23/63B01J23/89B01J23/8906B01J23/8913B01J23/8926B01J23/894C07C51/235C07C59/285C07C59/245
Inventor 金鑫闫昊杨朝合
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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