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A kind of metal oxide supports gold to efficiently catalyze glycerol to prepare DHA catalyst and preparation method thereof

A double metal oxide, catalytic glycerol technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, carbon-based compound preparation, etc., can solve the problem that DHA activity needs to be further improved, and achieve performance Good results

Active Publication Date: 2021-06-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing research results show that the activity of glycerol oxidation to DHA needs to be further improved

Method used

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  • A kind of metal oxide supports gold to efficiently catalyze glycerol to prepare DHA catalyst and preparation method thereof

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Experimental program
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Embodiment 1

[0014] Step A: Weigh Zn(NO 3 ) 2 ·6H 2 O, Ga(NO 3 ) 3 9H 2 O(Zn(NO 3 ) 2 ·6H 2 O, Ga(NO 3 ) 3 9H 2 The molar ratio of O is 3) dissolve in deionized water, stir and sonicate until completely dissolved, the solution is clear and transparent (solution A); weigh Na 2 CO 3 Add 200mL of deionized water (solution C) into a 1000mL four-neck flask, weigh NaOH and dissolve it in 200mL of deionized water to prepare an alkaline solution (solution B). Under magnetic stirring at room temperature, solution A and solution B were slowly dropped into a four-necked flask, and the pH value was controlled to be constant. After the metal salt solution A is completely dropped, crystallize at a constant temperature in an oil bath. The solid sample was obtained by suction filtration under reduced pressure, washed with deionized water, dried in an oven, and ground to obtain ZnGa-CO 3 -LDHs powder, dry storage.

[0015] Step B: the above-prepared ZnGa-CO 3 - LDHs were placed in a round b...

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Abstract

The invention discloses a metal oxide-supported gold catalyst for efficiently catalyzing glycerin to prepare DHA and a preparation method thereof, which belong to the field of biomass catalytic conversion technology and related chemical technology. The catalyst consists of uniformly dispersed gold nanoparticles and bimetallic composite oxides. The catalyst is prepared by topological transformation of hydrotalcite as a carrier. The advantage is that the interface interaction between Au nanoparticles and the carrier and the interaction between the carrier metals can be adjusted by controlling the preparation method of the hydrotalcite precursor. The catalyst is used in the selective oxidation reaction of glycerol. When the reaction is at 80°C and 0.5Mpa for 4 hours, the conversion rate of glycerin can reach 98%, and the selectivity of DHA can reach 55.8%.

Description

technical field [0001] The invention belongs to the field of biomass catalytic conversion technology and related chemical technology, and in particular provides a catalyst for preparing 1,3-dihydroxyacetone (DHA) by catalyzing the selective oxidation of glycerin, its preparation and application. Background technique [0002] In recent years, biomass energy has developed rapidly due to its green and sustainable characteristics. Among them, biodiesel has become a typical representative of biomass energy because of its wide source of raw materials. During the production of biodiesel, a large amount of by-product glycerin (100Kg of glycerol is produced per ton of biodiesel produced) is produced. However, the downstream conversion capacity of glycerol is insufficient, resulting in overcapacity. Therefore, it is of great significance to catalyze the conversion of glycerol to high value-added products. The selective oxidation of glycerol to the target product is an important way ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/66B01J37/03B01J37/02B01J37/08C07C45/37C07C49/17
CPCB01J23/66B01J37/0201B01J37/03B01J37/082C07C45/37C07C49/17
Inventor 何静马洪浩安哲宋红艳舒心项顼
Owner BEIJING UNIV OF CHEM TECH
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