A kind of vanadium-based catalyst is used for the synthetic method of hydroxyacetone

A technology of hydroxyacetone and catalyst, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low cellulose conversion rate and high energy consumption for separation, and achieve simple preparation process and low energy consumption for separation , not easy to lose the effect

Active Publication Date: 2022-03-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the conversion rate of cellulose is low
Moreover, the reaction is carried out in water, and the boiling point of hydroxyacetone is higher than that of water, so the water needs to be evaporated and removed first in the product separation process, and the separation energy consumption is high
[0007] Chinese patents CN200910309282 and CN201110056529 both mentioned the method of producing hydroxyacetone from glycerin. The raw material glycerin can be derived from carbohydrates such as biomass. It is not as simple and direct as the process of directly producing hydroxyacetone from carbohydrates, and the raw material is limited to glycerol, so the application has limitations.

Method used

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  • A kind of vanadium-based catalyst is used for the synthetic method of hydroxyacetone
  • A kind of vanadium-based catalyst is used for the synthetic method of hydroxyacetone
  • A kind of vanadium-based catalyst is used for the synthetic method of hydroxyacetone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Beta-type molecular sieved aluminum: 20 g of Hβ molecular sieve, concentrated nitric acid in 200 ml of 12 mol / L, placed in a 500 ml of three flasks, mixed back through 80 ° C, de-release treatment for 12 h, washed to neutral, 110 ° C drying 24h, in 2 The rate of ° C / min was raised to 550 ° C, and after calcination 4 h, cooled to room temperature to obtain an Hβ-DEAL molecular sieve, and the catalyst V / Hβ-DEAL in the example V represents V 2 O 5 .

[0026] Catalyst Preparation: 1% V / Hβ-DEAL catalyst preparation:

[0027] 0.034 g of a trichloroxide was dissolved in 2 ml of ethanol, and 1 g of Hβ-DEAL molecular sieve was added, thoroughly stirred at 80 ° C overnight, and then baked at 600 ° C for 3 h, i.e., 1% V / Hβ-DEAL catalyst.

[0028] 0.5% V / Hβ-DEAL, 2% V / Hβ-DEAL, 4% V / Hβ-DEAL catalyst were prepared by the same method.

[0029] 1% RU / AC catalyst preparation:

[0030] Will 0.103G Rucl 3 In 10 ml of water, 5 g of activated carbon was added, and stirred with...

Embodiment 2

[0032] Glucose catalytic transformation experiment: 45 ml of methanol was added to a 100 ml reaction kettle, a vanadium-containing 0.012 g of a vanadium-based catalyst, 0.30 g 1% Ru / AC, and transferred in nitrogen and replaced three times, then transferred three times, charge hydrogen to 3 MPa, The temperature was raised to 220 ° C, and the 50 wt% glucose aqueous solution was injected with a high pressure constant current pump 5 mL, the flow rate was 1 ml / min, and the injection was continued after 30 min. After the reaction, it was cold to room temperature, the pressure relief is filtered, and the hydroxypropion yield was analyzed by the gas chromatography after filtration, and the glucose conversion and sorbitol yield were analyzed on liquid chromatography.

[0033]

[0034] The product yield in the table is carbon yield, product carbon yield = carbon molar number / carbohydrate in the product × 100%.

[0035] 1% RU / AC-4% V / Hβ-DEAL and 1% RU / AC-V 2 O 5 A preferred hyd...

Embodiment 3

[0037]Transformation of glucose catalytic transformation: 45 ml of methanol was added to a 100 ml reaction kettle, a 4% V / Hβ-DEAL catalyst containing 0.012 g of vanadium, 0.30 g 1% Ru / AC, and then inserted into a three times, and then transferred three times. Hydrogen was 3 MPa, warmed to the reaction temperature, injected 50 wt% glucose aqueous solution of 50 wt% glucose solution with a high pressure constant current pump, and continued to reflect 30 min after the flow rate of 1 ml / min. After the reaction, it was cold to room temperature, the pressure relief is filtered, and the hydroxypropion yield was analyzed by the gas chromatography after filtration, and the glucose conversion and sorbitol yield were analyzed on liquid chromatography.

[0038]

[0039] The data in the table can be seen that the highest hydroxypropionate yield is obtained at 220 ° C.

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Abstract

The invention provides a method for the synthesis of hydroxyacetone using a vanadium-based catalyst. The method uses carbohydrates as reaction raw materials, vanadium pentoxide and hydrogenation active metals as catalysts, methanol, ethanol and water as solvents, and undergoes a one-step catalytic conversion process under the conditions of 150-280°C and hydrogen pressure of 0.1-10MPa. , to realize the process of producing hydroxyacetone from carbohydrates. The invention has good product selectivity, raw material carbohydrates can be derived from biomass, and has the advantages of environmental protection, regeneration and the like. The use of supported catalysts is easy to separate, and the vanadium-based catalysts supported by molecular sieves are not easy to be lost during the reaction.

Description

Technical field [0001] The present invention relates to a method of vanadium-based catalyst for hydroxyacetone synthesis, specifically a reaction process that is degraded to hydroxyacetone under the action of a carbohydrate under a vanadium-based catalyst. Background technique [0002] Hydroxyacetone is mainly used in synthesizing 4-methylimidazole, 2-aminopropanol, 4-hydroxymethyrimidazole, vitamin H, acetate, 1,2-propanediol, and other fine chemicals, can also be used as biochemical reagents and foods. Additives, etc. It is mainly produced using 1,2-propanediol oxidation method and a hydromanone / one chlorocetone alcohol solution. Among them, the oxidation method is demanding, high equipment requirements; the raw materials used in alcohol solution are poisonous, and the price is also higher. In addition, these two methods are based on petroleum-based products, and with the shortage of fossil resources, the process of developing non-oil routes to prepare hydroxyacetone is conce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C45/60C07C49/17B01J29/78B01J23/46
Inventor 郑明远乔比塞巴斯蒂安姜宇张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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