Carbon-doped copper catalyst as well as preparation method and application thereof

A technology of copper catalyst and preparation steps, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. It can solve the problems of poor selectivity and large hydrogen-oil ratio, achieve high selectivity and reduce energy consumption , good thermal stability effect

Active Publication Date: 2021-06-29
NINGBO HUANYANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology has problems such as high hydrogen-to-oil ratio and poor selectivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] Embodiment 1: Preparation of carbon-doped copper catalyst of the present invention

[0114] The implementation mode of this embodiment is as follows:

[0115] A, preparation of raw material aqueous solution

[0116] Dissolving the soluble copper salt of copper nitrate and the polyethylene glycol carbon source raw material in deionized water to obtain a raw material aqueous solution with a copper ion concentration of 0.26 mol / L and a carbon source concentration of 0.014 mol / L;

[0117] B. Batch feeding

[0118] According to the weight ratio of silicon dioxide and deionized water in the silicon source as 1:5, add silica sol and deionized water with a silicon dioxide content of 30% by weight into the reactor with agitator, stir and mix evenly, Obtain a silicon source aqueous solution; according to the weight ratio of the silicon source solution and the raw material aqueous solution is 1:3, at room temperature and under stirring conditions, add the raw material aqueous so...

Embodiment 2

[0122] Embodiment 2: Preparation of carbon-doped copper catalyst of the present invention

[0123] The implementation mode of this embodiment is as follows:

[0124] A, preparation of raw material aqueous solution

[0125] dissolving copper nitrate soluble copper salt and polyether carbon source raw materials in deionized water to obtain a raw material aqueous solution with a copper ion concentration of 0.04 mol / L and a polyether concentration of 0.0025 mol / L;

[0126] B. Batch feeding

[0127]According to the weight ratio of silicon dioxide and deionized water in the silicon source as 1:6, add silica sol and deionized water with a silicon dioxide content of 35% by weight into the reactor with agitator, stir and mix evenly, Obtain a silicon source solution; according to the weight ratio of the silicon source solution to the raw material aqueous solution of 1:6, at room temperature and under stirring conditions, add the raw material aqueous solution in 6 batches, and the adde...

Embodiment 3

[0131] Embodiment 3: Preparation of carbon-doped copper catalyst of the present invention

[0132] The implementation mode of this embodiment is as follows:

[0133] A, preparation of raw material aqueous solution

[0134] Dissolving copper nitrate soluble copper salt and polyethylene glycol carbon source raw materials in deionized water to obtain a raw material aqueous solution with a copper ion concentration of 0.4mol / L and a polyethylene glycol concentration of 0.0085mol / L;

[0135] B. Batch feeding

[0136] According to the weight ratio of silicon dioxide and deionized water in the silicon source is 1:6, add 400 mesh silica gel and deionized water into the reaction kettle with agitator, stir and mix evenly to obtain a silicon source solution; according to the silicon source The weight ratio of the solution to the raw material aqueous solution is 1:4. Under the conditions of room temperature and stirring, add the raw material aqueous solution according to 8 batches, and a...

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Abstract

The invention relates to a carbon-doped copper catalyst as well as a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: preparing a raw material aqueous solution, conducting feeding in batches, conducting aging, distilling ammonia and the like. The prepared carbon-doped copper catalyst has good catalytic activity when being applied to a glycerol hydrogenolysis reaction, the conversion rate of glycerol reaches 90-99%, the selectivity of propylene glycol reaches 96-99%, the catalyst is long in service life, the activity and the selectivity are not obviously reduced after the catalyst runs in a fixed bed reactor for 500 hours, and the carbon-doped copper catalyst has very good industrial application prospects.

Description

【Technical field】 [0001] The invention belongs to the technical field of catalyst preparation. More specifically, the present invention relates to a carbon-doped copper catalyst, a method for preparing the carbon-doped copper catalyst, and a use of the carbon-doped copper catalyst. 【Background technique】 [0002] As a substitute for petroleum, biodiesel has been encouraged by various countries in recent years. Biodiesel not only has good cleanliness, but also is a renewable energy source. Due to the rise of biodiesel, a large surplus of its by-product glycerol has been caused, which makes it urgent to develop its downstream high value-added chemicals, among which the hydrogenolysis of glycerol is the most important way of utilization. A series of low-carbon alcohol compounds obtained by hydrogenolysis of glycerol, such as propylene glycol (1,3-propanediol, 1,2-propanediol), ethylene glycol, n-propanol, etc., are used in medicine, industrial solvents, synthetic polyester fib...

Claims

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Application Information

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IPC IPC(8): B01J23/72B01J37/03B01J37/00B01J37/08B01J37/18C07C29/132C07C31/20
CPCB01J23/72B01J37/031B01J37/0009B01J37/082B01J37/18C07C29/132C07C31/205
Inventor 方福良刘崇兵包科华尚名龙江耀何聪施社稷周黎
Owner NINGBO HUANYANG CHEM
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