Method for preparing mesoporous molecular sieve-loading Cu-Ni bimetallic catalyst

A technology of bimetallic catalysts and mesoporous molecular sieves, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of complex preparation process, poor reproducibility, low selectivity and catalytic activity, and achieve The effect of simple process, strong acid center and good thermal stability

Inactive Publication Date: 2016-01-27
QINGDAO LANNONGGU AGRI PROD RES & DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing catalysts have defects such as low selectivity and catalytic activity, complex preparation process, and poor reproducibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: (1) Add NaOH, aluminum isopropoxide, tetraethylammonium bromide (25%), water glass, copper nitrate and RaneyNi deionized water into the reaction kettle, mechanically stir vigorously to make it a uniform mixed solution, and program the temperature After aging at 140°C for 4 hours. The stoichiometric ratio of the reaction raw materials is Al 2 o 3 / SiO 2 / Na 2 O / (TEA) 2 O / Cu / Ni / H 2 O=0.5 / 55 / 2.0 / 0.5-1.8 / 0.4 / 0.5 / 800.

[0018] (2) Take 4.0g of the solution obtained in step (1), 1.0g of EO20PO70EO20 (P123), 10g of 1-hexadecyl-3-methylimidazolium bromide ionic liquid and 15ml of distilled water, and stir it mechanically to dissolve it. Then control the crystallization conditions (95°C, 23 hours) to adjust the size and purity of the crystal form. The resulting crystals were successively filtered, washed and dried in vacuo.

[0019] (3) Put the raw mesoporous molecular sieve powder obtained in step (2) into a muffle furnace, and bake it at 550°C for 5.5 hours...

Embodiment 2

[0020] Example 2: (1) Add NaOH, aluminum isopropoxide, tetraethylammonium bromide (25%), water glass, copper nitrate and RaneyNi deionized water into the reaction kettle, mechanically stir vigorously to make it a uniform mixed solution, and program the temperature After aging at 140°C for 4 hours. The stoichiometric ratio of the reaction raw materials is Al 2 o 3 / SiO 2 / Na 2 O / (TEA) 2 O / Cu / Ni / H 2 O=1.8 / 65 / 3.0 / 0.5 / 0.4 / 0.5 / 800.

[0021] (2) Take 4.0g of the solution obtained in step (1), 1.0g of EO20PO70EO20 (P123), 10g of 1-hexadecyl-3-methylimidazolium bromide ionic liquid and 15ml of distilled water, and stir it mechanically to dissolve it. Then control the crystallization conditions (95°C, 23 hours) to adjust the size and purity of the crystal form. The resulting crystals were successively filtered, washed and dried in vacuo.

[0022] (3) Put the raw mesoporous molecular sieve powder obtained in step (2) into a muffle furnace, and bake it at 550°C for 5.5 hours to...

Embodiment 3

[0023] Example 3: (1) Add NaOH, aluminum isopropoxide, tetraethylammonium bromide (25%), water glass, copper nitrate and RaneyNi deionized water into the reaction kettle, mechanically stir vigorously to make it a uniform mixed solution, and program the temperature After aging at 140°C for 4 hours. The stoichiometric ratio of the reaction raw materials is Al 2 o 3 / SiO 2 / Na 2 O / (TEA) 2 O / Cu / Ni / H 2 O=1.0 / 60 / 2.5 / 1.2 / 0.4 / 0.5 / 800.

[0024] (2) Take 4.0g of the solution obtained in step (1), 1.0g of EO20PO70EO20 (P123), 10g of 1-hexadecyl-3-methylimidazolium bromide ionic liquid and 15ml of distilled water, and stir it mechanically to dissolve it. Then control the crystallization conditions (95°C, 23 hours) to adjust the size and purity of the crystal form. The resulting crystals were successively filtered, washed and dried in vacuo.

[0025] (3) Put the raw mesoporous molecular sieve powder obtained in step (2) into a muffle furnace, and bake it at 550°C for 5.5 hours to...

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PUM

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Abstract

The present invention discloses a method for preparing a mesoporous molecular sieve-loading Cu-Ni bimetallic catalyst, and aims at the defect of a catalyst for preparation process of 1,2-propanediol by glycerol hydrogenolysis, ionic liquid 1-cetyl-3-methyl bromo-imidazole is used as a template agent, and two metal elements Cu and Ni are added into the ion thermal synthesis process of the catalyst. Compared with immersion method in the prior art, the metal loading process is simple. The catalyst exhibits good thermal stability and strong acid sites, and exhibits high reactivity in the course of preparation of 1,2-propanediol from glycerol, glycerol conversion rate is more than 70%, and 1,2-propanediol selectivity is above 50%.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a preparation method of a catalyst for catalyzing the hydrogenolysis of glycerin to prepare 1,2-propanediol. Background technique [0002] As an important chemical raw material, propylene glycol is used as a solvent and additive in many fields, and it is an important raw material for important chemicals such as unsaturated polyester, epoxy resin, polyurethane resin and new polyester compound PTT. The method of producing propylene glycol with petroleum as raw material is not suitable for industrial large-scale production process due to the high price and non-renewable raw material. [0003] With the rapid development of the biodiesel industry in recent years, glycerin is produced as a by-product in the production process in large quantities. The rational use of these excess glycerol will help increase the economic benefits of the entire biodiesel industry. It has been found that glycerol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/072C07C29/60C07C31/20
Inventor 宋波
Owner QINGDAO LANNONGGU AGRI PROD RES & DEV
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