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Catalyst for preparing 2-methyltetrahydrofuran by hydrogenation and its use method

A technology for the preparation of methyl tetrahydrofuran and hydrogen, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. Environmental protection and other issues, to achieve the effects of mild reaction conditions, high selectivity, and simple operation of the reaction process

Active Publication Date: 2020-10-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that the preparation process of 2-methyltetrahydrofuran in the prior art is complex and not environmentally friendly. A new method for preparing 2-methyltetrahydrofuran is provided, which is used to prepare 2-methanol When based on tetrahydrofuran, it has the advantages of simple preparation process, green environmental protection, etc.

Method used

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  • Catalyst for preparing 2-methyltetrahydrofuran by hydrogenation and its use method
  • Catalyst for preparing 2-methyltetrahydrofuran by hydrogenation and its use method
  • Catalyst for preparing 2-methyltetrahydrofuran by hydrogenation and its use method

Examples

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Embodiment 1

[0033] Take copper nitrate and nickel nitrate in proportion and add them to the silicon oxide aqueous solution (Cu: Ni: silicon oxide = 25:5:70, weight ratio), stir evenly at room temperature and adjust the pH by adding a precipitant until the precipitation of Cu and Ni ions is complete. Stirring was continued for 2 hours. The resulting solution was filtered, dried and calcined to obtain a catalyst precursor. Pass hydrogen through the precursor at a pressure of 0.3-0.5MPa, the volume ratio of hydrogen to catalyst is 350:1, raise the temperature of the catalyst bed to 300°C within 36 hours, and complete the reduction at constant temperature for 8 hours to obtain a Cu-based catalyst Cu-Ni / SiO 2 .

[0034] Adding Cu-based Catalyst Cu-Ni / SiO in Continuous Fixed-bed Reactor 2 , at a reaction temperature of 160°C and a pressure of 2.8Mpa, the molar ratio of hydrogen to levulinic acid ester is 80, and the mass space velocity of levulinic acid ester is 1.0h -1 , the conversion rat...

Embodiment 2

[0036] Add copper nitrate and zinc nitrate in proportion to titanium oxide aqueous solution (Cu: Zn: titanium oxide = 30: 5: 65, weight ratio), stir evenly at room temperature and adjust the pH by adding a precipitant until Cu and Zn ions are completely precipitated Stirring was continued for 2 hours. The resulting solution was filtered, dried and calcined to obtain a catalyst precursor. Pass hydrogen through the precursor at a pressure of 0.3-0.5MPa, the volume ratio of hydrogen to catalyst is 200:1, raise the temperature of the catalyst bed to 250°C within 12 hours, and complete the reduction at constant temperature for 9 hours to obtain a Cu-based catalyst Cu-Zn / TiO 2 .

[0037] Adding Cu-based Catalyst Cu-Zn / TiO in Continuous Fixed-bed Reactor 2 , at a reaction temperature of 140°C, a pressure of 2.5Mpa, a molar ratio of hydrogen to levulinate of 90, and a mass space velocity of levulinate of 0.5h -1 , the conversion rate of levulinic acid ester is 100%, and the select...

Embodiment 3

[0039] Take copper nitrate and magnesium acetate in proportion and add them to the aqueous silica solution (Cu: Mg: silica = 28:2:70, weight ratio), stir well at room temperature and adjust the pH by adding a precipitant until Cu and Mg ions are completely precipitated Stirring was continued for 2 hours. The resulting solution was filtered, dried and calcined to obtain a catalyst precursor. Pass hydrogen through the precursor at a pressure of 0.3-0.5MPa, the volume ratio of hydrogen to catalyst is 250:1, raise the temperature of the catalyst bed to 350°C within 36 hours, and complete the reduction at constant temperature for 9 hours to obtain a Cu-based catalyst Cu-Mg / SiO 2 .

[0040] Addition of Cu-Mg / SiO in Continuous Fixed Bed Reactor 2 Catalyst, at a reaction temperature of 200°C, a pressure of 2.5Mpa, a molar ratio of hydrogen to levulinic acid ester of 100, and a mass space velocity of levulinic acid ester of 1.20h -1 , the conversion rate of levulinic acid ester is ...

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Abstract

The invention discloses a method for preparing 2-methyltetrahydrofuran through catalytic hydrogenation. According to the method, under suitable technological conditions, levulinate is subjected to high-selectivity hydrogenation reaction with a Cu-based catalyst to obtain 2-methyltetrahydrofuran. The invention discloses a Cu-based catalyst and a preparation method thereof, and applications of the Cu-based catalyst in preparation of 2-methyltetrahydrofuran through levulinate hydrogenation. According to the present invention, the method has advantages of high catalyst activity, high selectivity of the product 2-methyltetrahydrofuran, and the like, and can be industrially used for the preparation of 2-methyltetrahydrofuran through levulinate hydrogenation.

Description

technical field [0001] The invention relates to a method for preparing 2-methyltetrahydrofuran from levulinate by hydrogenation; in particular, it relates to a method for preparing 2-methyltetrahydrofuran by one-step catalytic hydrogenation of levulinate. Background technique [0002] Biomass is a renewable resource obtained through photosynthesis in nature, mainly composed of cellulose, lignin and hemicellulose, of which cellulose accounts for about 30%. As the only green carbon source, biomass energy accounts for about 68% of the world's renewable energy. In the long run, traditional fossil raw materials are non-renewable, and the use of fossil resources also increases greenhouse gas emissions, which is not in line with the green and low-carbon development strategy. Research on the production of organic chemicals and fuels from non-food biomass resources has attracted increasing attention. [0003] Cellulose can obtain 5-hydroxymethylfurfural (5-HMF) and levulinic acid (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J23/80B01J23/78B01J23/72B01J23/89B01J23/885C07D307/06
CPCB01J23/755B01J23/78B01J23/80B01J23/885B01J23/8872B01J23/8926C07D307/06
Inventor 赵焱王万民
Owner CHINA PETROLEUM & CHEM CORP
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