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Method for preparing hydrotalcite loaded palladium catalyst for catalyzing Suzuki coupled reaction through biomass reduction

A technology of coupling reaction and palladium catalyst, applied in the direction of physical/chemical process catalyst, carbon compound catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of environmental pollution, toxicity of chemical reduction reagents, etc. Achieve the effect of uniform particle size distribution, high catalytic activity and cost reduction

Inactive Publication Date: 2016-03-16
INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that chemical reduction reagents have certain toxicity and will pollute the environment, and provide a method for preparing and catalytic Suzuki coupling reaction hydrotalcite-supported palladium catalyst by reducing biomass

Method used

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  • Method for preparing hydrotalcite loaded palladium catalyst for catalyzing Suzuki coupled reaction through biomass reduction
  • Method for preparing hydrotalcite loaded palladium catalyst for catalyzing Suzuki coupled reaction through biomass reduction
  • Method for preparing hydrotalcite loaded palladium catalyst for catalyzing Suzuki coupled reaction through biomass reduction

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specific Embodiment approach 1

[0020] Specific embodiment 1: The method for preparing the catalytic Suzuki coupling reaction hydrotalcite supported palladium catalyst in this embodiment is as follows:

[0021] 1. Preparation of hydrotalcite carrier:

[0022] Dissolve in deionized water according to the molar ratio of Mg to Al of 2 to 4:1 to obtain solution A;

[0023] According to CO 3 2- with Mg 2+ Dissolve in deionized water with a molar ratio of 0.4 to 1.2:1 to obtain solution B;

[0024] Add solution B dropwise to solution A, the volume ratio of solution B to solution A is (0.6-1.8):1, stir for 2 hours, and measure and control the pH value to be 9-11, then centrifuge and wash, then transfer to an autoclave Crystallize at a temperature of 60-120°C for 12-24 hours; dry in a blast drying oven at 80°C for 6 hours, and grind to obtain a hydrotalcite carrier;

[0025] 2. Extraction of reducing agent:

[0026] The air-dried leaves are crushed into leaf powder, and then the leaf powder and water are soake...

specific Embodiment approach 2

[0029] Embodiment 2: This embodiment is different from Embodiment 1 in that the leaves described in step 2 are poplar leaves, linden leaves, birch leaves or willow leaves. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 1, the crystallization is carried out in an autoclave at a temperature of 80-100°C. Others are the same as those in the first or second embodiment.

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Abstract

The invention relates to a method for preparing a catalyst, in particular to a method for preparing a hydrotalcite loaded palladium catalyst for catalyzing a Suzuki coupled reaction through biomass reduction and belongs to the field of preparation of catalysts. The method aims at solving the problem that a chemical reducing reagent has certain toxicity and can pollute the environment. The method comprises the following steps that a hydrotalcite carrier is prepared; a reducing agent is extracted; the hydrotalcite loaded palladium catalyst is prepared. Naturally growing organisms are adopted as a source of the reducing agent, and meanwhile the protection function of a surface active agent can also be achieved. The hidden danger of environmental pollution is eliminated. The material source is wide, and cost is greatly reduced. Due to the fact that extracting biomass is a macromolecular compound, the function of dispersing hydrotalcite and palladium nano crystals can be achieved, prepared Pd nano particles are even in particle size distribution, and are highly dispersed, high catalytic activity is represented in the process of catalyzing the Suzunki coupled reaction, and the Pd nano particles can be recycled and reused.

Description

technical field [0001] The invention relates to a method for preparing a catalyst. Background technique [0002] In recent years, due to the wide application of Suzuki coupling reaction in the fields of pharmaceuticals, dyes, natural products and advanced materials, the research on the optimization of Suzuki coupling reaction conditions has aroused great interest, and the noble metal palladium is an efficient catalyst, Often used in Suzuki coupling reactions. In order to obtain green, low-cost, and reusable palladium catalysts, supported heterogeneous palladium catalysts have become a research hotspot. Chemical reduction method to realize Pd 2+ The preparation of supported catalysts through the reduction of chemical reduction reagents will pollute the environment due to the toxicity of many chemical reducing reagents, and their use costs are relatively high. Contents of the invention [0003] The purpose of the present invention is to solve the problem that the chemical...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J37/16B01J21/10C01F7/00C07C45/68C07C49/788C07C1/26C07C15/14C07C201/12C07C205/06
CPCC07C1/26C07C45/68C07C201/12B01J21/10B01J23/44B01J37/16C07C2523/44C07C2521/10C01F7/785C07C49/788C07C15/14C07C205/06
Inventor 白雪峰樊西征张雪樊慧娟韩大维
Owner INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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