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pt nano-alloy catalyst and its preparation method and use

A nano-alloy and catalyst technology, applied in the field of Pt nano-alloy catalyst and its preparation, can solve the problems of unsatisfactory catalyst catalytic effect and harsh reaction conditions, and achieve the effects of large acting force, mild catalytic reaction conditions and good recovery performance.

Active Publication Date: 2018-02-06
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of unsatisfactory catalytic effect and harsh reaction conditions of existing catalysts, and aims to provide a highly efficient catalyst "Pt nano-alloy catalyst" and its preparation method for the catalytic reduction of glycerin to generate 1,2-propanediol. It has a good catalytic effect to improve the selectivity of the reaction, the conversion rate of the product and optimize the reaction conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: the preparation of Pt nano-alloy catalyst (the molar ratio of Pt and Cu is 0:1)

[0030] 1. Raw material and ratio

[0031] Cu(NO 3 ) 2 ·3H 2 O 1.5mmol (0.36g)

[0032] SiO 2 1g

[0033] 2. Preparation of catalyst

[0034] The weighed Cu(NO 3 ) 2 ·3H 2 Add 3ml deionized water to O and stir for 2h; weigh 1g carrier SiO 2 , was added to the mixture and stirred for 5h to obtain a catalyst precursor; then the catalyst precursor was put into a vacuum drying oven at 55° C. to dry for 48 hours; :5) Activation treatment at 350° C. for 4 hours to obtain the product.

Embodiment 2

[0035] Embodiment 2: the preparation of Pt nano-alloy catalyst (the molar ratio of Pt and Cu is 1:1)

[0036] 1. Raw material and ratio

[0037] h 2 PtCl 6 ·6H 2 O 1.5mmol (0.77g)

[0038] Cu(NO 3 ) 2 ·3H 2 O 1.5mmol (0.36g)

[0039] SiO 2 1g

[0040] 2. Preparation of catalyst

[0041] Catalyst preparation method is the same as embodiment 1 in the present embodiment.

Embodiment 3

[0042] Embodiment 3: the preparation of Pt nano-alloy catalyst (the molar ratio of Pt and Cu is 2:1)

[0043] 1. Raw material and ratio

[0044] h 2 PtCl 6 ·6H 2 O 3mmol (1.54g)

[0045] Cu(NO 3 ) 2 ·3H 2 O 1.5mmol (0.36g)

[0046] SiO 2 1g

[0047] 2. Preparation of catalyst

[0048] Catalyst preparation method is the same as embodiment 1 in the present embodiment.

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PUM

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Abstract

The invention discloses a Pt nanometer alloy catalyst, and a preparation method and application thereof. The Pt nanometer alloy catalyst is characterized by comprising an active component donor and a carrier, wherein a mol mass ratio of the active component donor to the carrier is 0.5 to 10 mmol / g, the active component donor is obtained through chemical combination of a Pt compound and Cu. The Pt nanometer alloy catalyst is applicable to catalysis of hydrogenolysis of glycerin so as to prepare 1,2-propylene glycol. The catalyst provided by the invention is simple to prepare, has high catalytic activity and can be cyclically used, and a product is easy to separate and poses small pollution to the environment.

Description

1. Technical field [0001] The invention relates to a catalyst in the process of organic synthesis, in particular to a Pt nano-alloy catalyst and its preparation method and application. 2. Background technology [0002] Currently, the rapid development of biodiesel has resulted in a large surplus of glycerin, which is by-produced in the production process. How to effectively convert glycerol has become an important issue. Both 1,2-propanediol and 1,3-propanediol are important organic chemical raw materials, and are widely used as hygroscopic agents, antifreeze agents, lubricants and solvents in the food industry, pharmaceutical industry, and cosmetic industry. The hydrogenolysis of glycerol to produce 1,2-propanediol or 1,3-propanediol has been widely concerned. [0003] There are a large number of patents and literature reports on the hydrogenolysis of glycerol to propylene glycol, in which metal-supported catalysts are the main catalysts, and the commonly used metals are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J29/03C07C29/60C07C31/20
CPCB01J23/8926B01J29/0333C07C29/60C07C31/205
Inventor 冯乙巳康玉梅刘威威
Owner HEFEI UNIV OF TECH