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Method for preparing aldonic acid, aldonic acid and uronic acid

A technology of aldaric acid and uronic acid, which is applied in the field of preparation of aldaric acid, aldonic acid and uronic acid, and can solve the problems that effective solutions for reducing or eliminating inhibition have not yet been developed

Active Publication Date: 2022-07-08
ARCHER DANIELS MIDLAND CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the causes of inhibition are not fully understood, and effective solutions for reducing or eliminating inhibition have not been developed

Method used

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  • Method for preparing aldonic acid, aldonic acid and uronic acid
  • Method for preparing aldonic acid, aldonic acid and uronic acid
  • Method for preparing aldonic acid, aldonic acid and uronic acid

Examples

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example

[0144] The following non-limiting examples are provided to further illustrate the present invention.

example 1

[0145] Example 1: Using Au / TiO 2 Catalyst converts glucose to gluconic acid

[0146] 1 wt.% Au / TiO 2 The catalyst is charged into a fixed packed bed reactor. A solution of 20wt.% glucose in water for 2.0hr -1 The liquid hourly space velocity (LHSV) of 50% air, 50% N was fed into the reactor in co-current flow at a rate of 1000 SCCM 2 air flow. The pressure of the system was maintained at 750 psig. The temperature of the reactor jacket was varied between 75°C and 85°C.

[0147] The reaction was carried out for about 1750 hours. Between 1520 and 1568 hours of operation, the feed was changed to include a 0.8 wt. % glyceric acid and 20 wt % glucose feed stream. like Figure 7 As shown in , glucose conversion and gluconic acid yield were significantly reduced when glyceric acid was present in the feed stream. Glucose conversion decreased from about 100% to about 35%, and gluconic acid yield decreased from about 98% to about 45%.

[0148] The reaction temperature also decr...

example 2

[0150] Example 2: Conversion of Gluconate to Glucarate Using Pt / C Catalyst

[0151] About 25 mg of 4 wt.% Pt / C catalyst was charged into the batch reactor. 2.3 mL of a 10 wt.% solution of gluconic acid in water was introduced into the reactor. The reactor was maintained at 85°C and pressurized to 1800 psi with air. The reaction was carried out for 1 hour.

[0152] Seven additional reactions were performed under the same conditions with various compositions introduced into the gluconic acid feed solution to test conversion inhibition. The gluconic acid feed solution was tested to contain 0.08M propionic acid, 0.08M lactic acid, 0.08M glyceric acid, 0.04M glyceric acid, 0.02M hydroxymalonic acid, 0.02M tartaric acid and 0.05M malic acid.

[0153] Figure 8 The conversion of gluconic acid and the production of guluronic acid, glucarate, 2-keto-gluconate, glycerate, and 5-keto-gluconate in each experiment are reported. Rate. Each experiment was performed in duplicate.

[01...

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Abstract

Various methods for preparing aldonic acids, aldonic acids, uronic acids, and / or one or more lactones thereof are described. For example, methods are described for preparing a C5-C6 aldonic acid and / or one or more lactones thereof by catalytic oxidation of a C5-C6 aldonic acid and / or one or more lactones thereof and / or a C5-C6 aldose.

Description

technical field [0001] Various methods for preparing aldaric acid, aldonic acid, uronic acid, and / or one or more lactones thereof are described. For example, described for the catalytic oxidation of C 5 -C 6 Aldonic acid and / or one or more of its lactones and / or C 5 -C 6 aldose preparation C 5 -C 6 A method of aldaric acid and / or one or more lactones thereof. Background technique [0002] For many years, there has been interest in the use of biorenewable materials as feedstocks to produce commercially useful chemicals. In particular, a great deal of work has focused on the oxidation of sugars obtained from these materials to aldarates, especially glucose to glucaric acid. See, for example, US Patent Nos. 8,669,397 and 8,785,683, which are incorporated herein by reference. These products are not only used as intermediates in the production of monomers such as adipic acid, but also in applications such as antifreezes, acidifiers, detergent builders, pH adjusters, chela...

Claims

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Application Information

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IPC IPC(8): C07C51/487
CPCC07C51/235C07C51/23Y02P20/582C07C59/105C07C59/285C07C51/64B01J23/52B01J23/42
Inventor 卡尔·阿尔布雷克特詹姆斯·布拉兹迪尔安德鲁·英格拉姆
Owner ARCHER DANIELS MIDLAND CO
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