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Preparation method of pyruvic aldehyde glycol

A technology for acetal acetal and dihydroxyacetone is applied in the field of preparing acetal acetal, and can solve the problems of harsh reaction conditions, difficult separation of by-products, expensive raw materials and the like

Pending Publication Date: 2021-10-12
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The synthetic method of existing acetone aldehyde acetal needs special raw material, and raw material price is expensive, is difficult for obtaining; The synthetic method that has needs elaborate synthetic operation, and reaction condition is harsh, and the yield of acetone aldehyde acetal compound is low, and the by-product of generation The universal application of the above synthesis method is limited by the difficulty of separation of the product and the like

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  • Preparation method of pyruvic aldehyde glycol
  • Preparation method of pyruvic aldehyde glycol
  • Preparation method of pyruvic aldehyde glycol

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preparation example Construction

[0073] The preparation method of the catalyst of the present invention may comprise the following steps: the sodium sulfonate type cation exchange resin cleaned by deionized water and ethanol is stirred and soaked (1~24h) with sulfuric acid or hydrochloric acid (0.5~20% concentration for example), deionized water Wash with ethanol to neutrality to obtain the sulfonic acid type cation exchange resin of the present invention.

[0074] In some embodiments, the mass ratio of the 1,3-dihydroxyacetone to the alcohol is 1:0.01-1:100 (for example, 1:0.01, 1:0.02, 1:0.03, 1:0.04, 1:0.01 0.05, 1:0.1, 1:0.5, 1:1, 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, 1:11, 1:12, 1:13, 1:14, 1:15, 1:16, 1:17, 1:18, 1:19, 1:20, 1:25, 1:30, 1:25 35, 1:40, 1:45, 1:50, 1:55, 1:60, 1:65, 1:70, 1:75, 1:80, 1:85, 1:90, 1:95, 1:100, etc.), or 1:0.1-10:1.

[0075] The molar concentrations of the raw materials 1,3-dihydroxyacetone and alcohol are respectively 0.01 mol / liter to 20 mol / liter. The form of ...

Embodiment 1

[0087] Synthesis of Dimethyl Acetal of Aceguvaldehyde

[0088] Add 1.5 grams of catalyst hydrogen sulfonic acid cation exchange resin, 13.6 grams of 1,3-dihydroxyacetone and 150 milliliters of methanol in a 300 milliliter tank reactor (the molar concentration of 1,3-dihydroxyacetone and methanol is 1.0 mol / liter ), reacted at 110°C and 0.1-0.7MPa pressure for 10 hours, and took samples for analysis by gas chromatography. The molar yield of the prepared aceguvaldehyde dimethyl acetal is 55% (based on 1,3-dihydroxyacetone), and the selectivity is 65%.

Embodiment 2

[0090] Add 2.0 g of Sn ion-modified sulfonic acid type cation exchange resin catalyst, 13.6 g of 1,3-dihydroxyacetone and 280 ml of isooctyl alcohol into a 300 ml tank reactor, and react at 35 °C and 0.02-0.3 MPa After 36 hours, a sample was taken and analyzed by gas chromatography. The molar yield of diisooctanol acetal acetal obtained is 83% (based on 1,3-dihydroxyacetone), and the selectivity is 96%.

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Abstract

The invention relates to a method for preparing pyruvic aldehyde glycol, which comprises the following step of: reacting 1, 3-dihydroxy acetone with alcohol in the presence of a catalyst to obtain the pyruvic aldehyde glycol.

Description

technical field [0001] The present application relates to the field of chemical engineering, and in particular, the present application relates to a method for preparing acetone aldehyde acetal. Background technique [0002] The synthetic method of existing acetone aldehyde acetal needs special raw material, and raw material price is expensive, is difficult for obtaining; Some synthetic methods need fine synthetic operation, and reaction condition is harsh, and aceguv aldehyde acetal compound productive rate is low, and the by-product of generation The general application of the above synthetic method is limited by reasons such as difficult separation of the product. Therefore, it is necessary to find a method for the preparation of acetone aldehyde acetal compound with a large number of easily available raw materials, general synthetic method, simple and effective, high yield and high selectivity. [0003] Summary of the invention [0004] The application provides the met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/64C07C49/175
CPCC07C45/64C07C49/175
Inventor 李青松贾冰孙伟振蒋越洋韩迈迟泽源郭之辉
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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