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Catalyst to prepare 1,3-dihydroxyacetone and preparation method thereof

A hydroxyacetone catalyst, catalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. Acetone selectivity is not good enough, the utilization rate of active components is not high, etc., to achieve the effect of rich loading active sites, good activity and selectivity, and excellent effect

Active Publication Date: 2019-04-05
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific surface area of ​​ZnO is generally low, which is not conducive to the dispersion of Au when used as a carrier.
Especially at high loads, the surface tension causes Au to sinter and the particles become larger, which is easy to lose and the utilization rate of precious metals is low
[0004] However, the above-mentioned catalysts generally have the defects of low utilization rate of active components, insufficient activity, and insufficient stability, dispersion and specific surface area of ​​the carrier components, resulting in insufficient selectivity of 1,3-dihydroxyacetone. To develop a Catalysts with excellent activity are necessary

Method used

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  • Catalyst to prepare 1,3-dihydroxyacetone and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0021] A preparation method for preparing 1,3-dihydroxyacetone catalyst, comprising the steps of:

[0022] (1) Preparation of ZnAl-HTLc: soluble 0.375gAl(NO 3 ) 3 9H 2 O, 0.891gZn(NO 3 ) 2 ·6H 2 O was dissolved in 150ml of deionized water to prepare mixed solution A, and 0.042gNa 2 CO 3 Dissolve 0.48g NaOH in 150ml deionized water to prepare mixed solution B, then quickly mix solution A and solution B under rapid stirring, and reflux reaction at 60°C for 10h. After the reaction, the product is centrifugally washed to neutral, Dry to get ZnAl-HTLc;

[0023] (2) Preparation of composite carrier: Add 80mL of ZnAl-HTLc12g prepared in step (1) into 0.6mol / L glucose monohydrate aqueous solution, stir at room temperature until uniformly mixed; then transfer the above mixture to poly In a tetrafluoroethylene reactor, react at a constant temperature of 180°C for 6 hours, cool to room temperature after the reaction, separate the product, then alternately wash with deionized wate...

Embodiment 2

[0026] A preparation method for preparing 1,3-dihydroxyacetone catalyst, comprising the steps of:

[0027] (1) Preparation of ZnAl-HTLc: soluble 0.375gAl(NO 3 ) 3 9H 2 O, 0.594gZn(NO 3 ) 2 ·6H 2 O was dissolved in 150ml of deionized water to prepare mixed solution A, and 0.042gNa 2 CO 3Dissolve 0.32g NaOH in 150ml deionized water to prepare mixed solution B, then quickly mix solution A and solution B under rapid stirring, and reflux reaction at 60°C for 10h. After the reaction, the product is centrifugally washed to neutral, Dry to get ZnAl-HTLc;

[0028] (2) Preparation of composite carrier: Add 15g of ZnAl-HTLc prepared in step (1) into 80mL of glucose monohydrate aqueous solution with a concentration of 0.6mol / L, stir at room temperature until uniformly mixed; then transfer the above mixture to poly In a tetrafluoroethylene reactor, react at a constant temperature of 180°C for 6 hours, cool to room temperature after the reaction, separate the product, then alternate...

Embodiment 3

[0031] A preparation method for preparing 1,3-dihydroxyacetone catalyst, comprising the steps of:

[0032] (1) Preparation of ZnAl-HTLc: soluble 0.375gAl(NO 3 ) 3 9H 2 O, 0.891gZn(NO 3 ) 2 ·6H 2 O was dissolved in 150ml of deionized water to prepare mixed solution A, and 0.05gNa 2 CO 3 Dissolve 0.40g NaOH in 150ml deionized water to prepare mixed solution B, then quickly mix solution A and solution B under rapid stirring, and reflux reaction at 60°C for 10h. After the reaction, the product is centrifugally washed to neutral, Dry to get ZnAl-HTLc;

[0033] (2) Preparation of the composite carrier: add the ZnAl-HTLc12g prepared in step (1) into 100mL, and the concentration is 0.5mol / L in the aqueous glucose monohydrate solution, and stir at room temperature until uniformly mixed; then transfer the above mixture to poly In a tetrafluoroethylene reactor, react at a constant temperature of 180°C for 6 hours, cool to room temperature after the reaction, separate the product,...

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Abstract

The invention discloses a catalyst to prepare 1,3-dihydroxyacetone and a preparation method thereof. The preparation method includes the steps of (1) preparing ZnAl-HTLc, to be specific, dissolving azinc salt and an aluminum salt in deionized water to obtain solution A, preparing solution B with Na2CO3 and NaOH, quickly mixing the solution A and the solution B, allowing refluxing reaction, centrifugally washing, and drying to obtain ZnAl-HTLc; (2) preparing a composite supporter, to be specific, adding the prepared ZnAl-HTLc into glucose monohydrate solution, mixing well, transferring the mixture to a polytetrafluoroethylene reactor, allowing hydrothermal reaction, cooling, and washing to obtain ZnAl-HTLc / carbon composite supporter; (3) preparing the catalyst, to be specific, preparing asolution with platinum chloride, neodymium nitrate and cerium nitrate, adding the solution to the composite supporter, impregnating, drying, calcining, and activating with hydrogen to obtain the catalyst. The catalyst has good activity, selectivity and stability and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a catalyst for preparing 1,3-dihydroxyacetone and a preparation method thereof. Background technique [0002] 1,3-Dihydroxyacetone (DHA for short) is the simplest ketose sugar, which is easily soluble in organic solvents such as water, ethanol, acetone and ether. DHA is an important chemical raw material, widely used in fine chemical industry, food, cosmetics and water purification and other industries; at the same time, DHA is also an important organic synthesis intermediate, which can be used to prepare various chiral compounds by aldol condensation and reduction preparation Optically active secondary alcohols, Diels-Alder addition to prepare sugar compounds or further reactions for such addition reactions, insertion reactions with carbene, and preparations with 2,2-dialkoxycyclopropane derivatives Lactone, etc. [0003] At present, 1,3-dihydroxyacetone is mainly prepared...

Claims

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Application Information

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IPC IPC(8): B01J23/63B01J37/02B01J37/08B01J37/10C07C45/39C07C49/17
CPCB01J23/63B01J37/0201B01J37/084B01J37/10C07C45/39C07C49/17
Inventor 王宝荣郭韬廖维林芮培欣谢贤清
Owner JIANGXI NORMAL UNIV
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