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Catalyst for preparing 1,3-propanediol through glycerine hydrogenolysis

A glycerol hydrogenolysis and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve the problem of high catalyst preparation cost, harsh reaction conditions, etc. The problem of low yield of 1,3-propanediol, etc., achieves the effect of good industrial application prospect, simple preparation process and good catalytic stability

Inactive Publication Date: 2016-02-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the catalysts for the preparation of 1,3-propanediol by glycerin hydrogenolysis at present mainly adopt noble metal catalysts, but the following problems of noble metals exist: the catalyst preparation cost is high, the conversion rate of glycerol is low and the yield of 1,3-propanediol is not high, and The required reaction conditions are more stringent
In addition, although some non-precious metal catalysts have certain 1,3-propanediol selectivity, the yield of 1,3-propanediol obtained is low, which affects its further industrial application

Method used

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  • Catalyst for preparing 1,3-propanediol through glycerine hydrogenolysis

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Dissolve 14.82g of cobalt nitrate and 73.58g of aluminum nitrate in 500mL of deionized water. Dissolve 20 g of anhydrous potassium carbonate in 100 mL of deionized water to prepare a solution with a concentration of 3.6 mol / L. At room temperature, drop the potassium carbonate solution into the metal solution drop by drop until the pH of the mixed solution is 9, continue to stir the reaction, filter after aging at room temperature for 48 hours, wash 5 times with deionized water, and obtain the solid product After drying at 100°C for 24 hours, it was ground into powder. Weigh 0.5g of silicotungstic acid and dissolve it in 30mL of deionized water, stir evenly, then weigh 10g of solid powder and add it to the silicotungstic acid solution, keep stirring at room temperature for 24h, then dry at 100°C for 24h, and finally dry at 400°C The final catalyst was obtained by calcining for 4 hours, grinding, and tableting.

[0021] The glycerol hydrogenolysis reaction is carried ou...

Embodiment 2

[0027] Dissolve 14.82g of cobalt nitrate and 73.58g of aluminum nitrate in 500mL of deionized water. Dissolve 20 g of anhydrous potassium carbonate in 100 mL of deionized water to prepare a solution with a concentration of 3.6 mol / L. At room temperature, drop the potassium carbonate solution into the metal solution drop by drop until the pH of the mixed solution is 9, continue to stir the reaction, filter after aging at room temperature for 48 hours, wash 5 times with deionized water, and obtain the solid product After drying at 100°C for 24 hours, it was ground into powder. Weigh 0.5g of silicotungstic acid and dissolve it in 30mL of deionized water, stir evenly, then weigh 10g of solid powder and add it to the silicotungstic acid solution, keep stirring at room temperature for 24h, then dry at 100°C for 24h, and finally dry at 400°C The final catalyst was obtained by calcining for 4 hours, grinding, and tableting.

[0028] The hydrogenolysis reaction of glycerol is carried...

Embodiment 3

[0030]Dissolve 14.82g of cobalt nitrate and 73.58g of aluminum nitrate in 500mL of deionized water. Dissolve 20 g of anhydrous potassium carbonate in 100 mL of deionized water to prepare a solution with a concentration of 3.6 mol / L. At room temperature, drop the potassium carbonate solution into the metal solution drop by drop until the pH of the mixed solution is 9, continue to stir the reaction, filter after aging at room temperature for 48 hours, wash 5 times with deionized water, and obtain the solid product After drying at 100°C for 24 hours, it was ground into powder. Weigh 0.5g of silicotungstic acid and dissolve it in 30mL of deionized water, stir evenly, then weigh 10g of solid powder and add it to the silicotungstic acid solution, keep stirring at room temperature for 24h, then dry at 100°C for 24h, and finally dry at 400°C The final catalyst was obtained by calcining for 4 hours, grinding, and tableting.

[0031] The glycerol hydrogenolysis reaction is carried out...

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Abstract

The invention discloses a catalyst for preparing 1,3-propanediol through glycerine hydrogenolysis. According to the catalyst, alumina serves as a carrier, cobalt metal serves as an active ingredient, and adjuvants comprise silicotungstic acid, phosphotungstic acid, phosphomolybdic acid and the like, wherein the content of the active ingredient is 30% the mass of the carrier, and the content of the adjuvants is 5% the mass of the catalyst. The catalyst has the advantages of good catalytic activity, high 1,3-propanediol yield and the like, and can achieve high-selectivity glycerine-hydrogenolysis preparation of 1,3-propanediol at the reaction temperature of 150-300 DEG C and the hydrogen gas pressure of 1-10MPa. Raw materials for preparing the catalyst are rich and cheap, the process is simple, and the catalyst is reusable.

Description

technical field [0001] The invention relates to the technical field of preparing 1,3-propanediol by hydrogenolysis of glycerol, in particular to a cobalt-based catalyst modified by adding different additives. Background technique [0002] With the gradual depletion of traditional fossil fuels and increasingly prominent environmental problems, countries all over the world are making great efforts to develop biodiesel clean energy. In the biodiesel production process, about 10% of the by-product glycerol can be produced. In recent years, due to the rapid development of the biodiesel industry, there has been a serious surplus of glycerol production. The selective hydrogenolysis of glycerol to propylene glycol is the most economical and developmental approach. Propylene glycol includes 1,2-propanediol and 1,3-propanediol, which are high value-added fine chemical products. Propylene glycol can be used in polyester, food, medicine, cosmetics, functional fluids and other fields,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J27/188B01J27/19B01J23/75B01J23/78B01J23/83B01J23/84C07C29/60C07C31/20
CPCB01J23/002B01J23/75B01J23/78B01J23/8437B01J23/888B01J27/188B01J27/19B01J2523/00C07C29/60B01J2523/845B01J2523/69B01J2523/31B01J2523/41B01J2523/48B01J2523/15B01J2523/3712B01J2523/25B01J2523/54C07C31/205
Inventor 肖国民蔡夫锋
Owner SOUTHEAST UNIV
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