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Preparation method and application of copper-based catalyst with interface synergistic effect

A copper-based catalyst and synergistic technology, applied in the preparation of organic compounds, the preparation of hydroxyl compounds, chemical instruments and methods, etc., can solve the problems of harsh reaction conditions, easy deactivation of a single active site, etc., and achieve good stability, enhanced Synergistic catalysis, high catalyst life effect

Pending Publication Date: 2020-10-20
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Pure copper-based catalysts have harsh reaction conditions and a single active site is prone to deactivation, and the construction of a synergistic structure between metal Cu and the support interface provides a promising way to solve the above problems.

Method used

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  • Preparation method and application of copper-based catalyst with interface synergistic effect
  • Preparation method and application of copper-based catalyst with interface synergistic effect
  • Preparation method and application of copper-based catalyst with interface synergistic effect

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Embodiment 1

[0020] Weigh Cu(NO 3 ) 2 ·3H 2 O, Mg(NO 3 ) 2 ·6H 2 O, Zr(NO 3 ) 4 ·5H 2 O and Al (NO 3 ) 3 ·9H 2 O is mixed and dissolved in 100ml of deionized water, where [Cu 2+ ] = 0.2mol / L, [Mg 2+ ] = 0.6mol / L, [Zr 4+ ]=0.01mol / L, [Al 3+ ]=0.2mol / L, labeled as solution A, stir well until completely dissolved; weigh out NaOH and Na 2 CO 3 Dissolved in 100ml deionized water, where [NaOH] = 1.6mol / L, and [CO 3 2- ]=2[Al 3+ ], marked as solution B, stir well until completely dissolved. The solution A and solution B are introduced into the colloid mill instrument at the same time, and the rotation speed of the colloid mill is adjusted to 4500 rpm and reacted for 3 minutes to obtain a uniformly nucleated slurry-like mixture. Bring the mixed solution to 90°C in a hydrothermal kettle for crystallization reaction for 48 hours, and then take it out and cool it to room temperature. The obtained precipitate was washed with deionized water and ethanol to neutrality (PH=7), and dried in an oven at 60°C ...

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Abstract

The invention discloses a preparation method and application of a copper-based catalyst with an interface synergistic effect. The preparation method comprises the following steps: firstly, synthesizing a CuXMgAl multi-element hydrotalcite precursor through a nucleation crystallization isolation method, X being one or more of Zr, Ti, Zn and Mn, and then preparing the copper-based catalyst with an interface synergistic effect through an in-situ hydrotalcite structure topological transformation reaction. The prepared copper-based nano-catalyst with rich interface structures (copper-oxygen-X-oxygen vacancies) has the outstanding active structure characteristics of enhanced active metal and carrier interface synergistic catalysis, controllable surface defect structures and the like; due to thestructural characteristics, effective activation of carbonyl of dimethyl oxalate molecules and dissociation of hydrogen are promoted, and meanwhile, the catalyst also has the structural and performance advantages of relatively large active specific surface area, layered nano structure, long service life of the catalyst and the like. The catalyst has a wide application prospect in the fields of energy catalysis, traditional industrial catalysis, petrochemical engineering and the like.

Description

Technical field [0001] The invention belongs to the technical field of catalyst preparation, and specifically relates to a method for preparing a copper-based catalyst with interfacial synergy and its application in catalyzing the hydrogenation reaction of dimethyl oxalate. Background technique [0002] Ethylene glycol is an important bulk organic chemical raw material, widely used in the production of fine chemical products such as polyester fibers, films, antifreeze, plastics, unsaturated polyester resins, and lubricants. With the development of the economy and the release of downstream demand, the consumption of ethylene glycol has continued to increase in recent years. It has broad application prospects and strong market demand. The dependence of my country's ethylene glycol industry on foreign imports has reached more than 40%. At present, the production process of industrial synthesis of ethylene glycol is mainly based on the oxidation of ethylene to generate ethylene oxide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J35/10C07C29/149C07C31/20
CPCB01J23/78B01J23/007C07C29/149B01J35/61C07C31/202
Inventor 卫敏崔国庆王辉李泽洋
Owner BEIJING UNIV OF CHEM TECH
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