Method for preparing 2-methyltetrahydrofuran catalyst through gas phase hydrogenation of 2-methylfuran

A technology of methyl tetrahydrofuran catalyst and methyl furan, which is applied in the direction of heterogeneous catalyst chemical elements, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve difficult industrialization and liquid phase reaction Continuous, containing precious metal production costs and other issues, to achieve good activity effect

Inactive Publication Date: 2019-04-05
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diol method usually uses 2-methyl-1,4-butanediol as a raw material to obtain 2-methyltetrahydrofuran through intramolecular dehydration, but 2-methyl-1,4-butanediol is expensive and difficult to realize industrialization ; Lactone method is in SiHCl 3 In the presence of γ-rays or ultraviolet light to irradiate the lactone, 2-methyltetrahydrofuran is obtained. The reaction conditions of this method are harsh and it is easy to cause metal pollution; for the levulinic acid method, the catalyst used is usually a noble metal catalyst containing Pt or Pd , leading to higher production costs; and the furfural method has been extensively studied bec...

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  • Method for preparing 2-methyltetrahydrofuran catalyst through gas phase hydrogenation of 2-methylfuran
  • Method for preparing 2-methyltetrahydrofuran catalyst through gas phase hydrogenation of 2-methylfuran

Examples

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Effect test

Embodiment 1

[0020] Weigh 3.9 g of hydrated nickel nitrate and dissolve it in 50.0 g of water, add 15.2 g of ammonia water and stir, after complete dissolution, add 34.0 g of silica sol and 0.3 g of calcium nitrate and seal and stir for 4 h, then evaporate ammonia at 70 °C under the assistance of ultrasonic waves When the pH is 6-7, the ammonia distillation is stopped, the obtained precipitate is washed, dried at 120 °C for 12 h, and calcined at 700 °C for 4 h to obtain the catalyst.

Embodiment 2

[0022] Weigh 19.5 g of nickel nitrate hydrate and dissolve it in 150.0 g of water, add 50.0 g of ammonia water and stir, add 32.0 g of silica sol and stir for 4 h after complete dissolution, then evaporate ammonia gas at 80°C under the assistance of ultrasonic waves, and wait until the pH is Stop ammonia distillation at 6-7 o'clock, wash the obtained precipitate, dry at 120°C for 12 h, and roast at 600°C for 4 h to prepare the catalyst.

Embodiment 3

[0024] Weigh 16.7 g of nickel nitrate hydrate and dissolve it in 120.0 g of water, add 40.2 g of ammonia water and stir, and after it is completely dissolved, add 11.6 g of silica sol, seal and stir for 4 h, then evaporate ammonia gas at 90°C under the assistance of ultrasonic waves, and wait until the pH is 6 Stop ammonia distillation at -7, wash the obtained precipitate, dry at 120 °C for 12 h, and roast at 650 °C for 4 h to prepare the catalyst.

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Abstract

The invention discloses a method for preparing a 2-methyltetrahydrofuran catalyst through gas phase hydrogenation of 2-methylfuran, and relates to a method for preparing the catalyst. The method includes dissolving soluble nickel salt or nickel salt and other metals in water to prepare a metal salt solution with a certain concentration; adding ammonia water into the solution for sealing and stirring; adding silica sol for sealing and stirring again for a certain time after the solution is evenly stirred; evaporating ammonia gas at a certain temperature to regulate the pH value of the obtainedsuspension to reach a certain value; and washing, drying and roasting the precipitate to finally prepare the NiO/SiO2 catalyst, wherein the mass percentage of NiO is 15%-45%, the mass percentage of SiO2 is 55%-85%, and the mass percentage of the metal auxiliary agent is 0.2%-8%; and the soluble metal salts are all metal nitrates. The preparation method of the catalyst is simple and easy to operateand has good repeatability; and the prepared catalyst can form a special layered silicate structure to maintain good activity, selectivity and stability.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a catalyst for 2-methyltetrahydrofuran by gas-phase hydrogenation of 2-methylfuran. Background technique [0002] 2-Methyltetrahydrofuran is an important biogasoline fuel, chemical intermediate and high-end environmentally friendly solvent. As a bio-gasoline fuel, 2-methyltetrahydrofuran can replace part of gasoline as an automotive fuel additive, can be miscible with gasoline in any proportion, and has excellent oxidation and vapor pressure properties. Studies have shown that its proportion in gasoline can exceed 60% by volume, and it will not have any impact on engine performance, and the fuel consumption of automobiles will not increase. Using it as a gasoline additive can have higher economic value. In addition, 2-methyltetrahydrofuran can also be used as a co-solvent for ethanol, which can reduce the pressure of ethanol and increase the mixing rati...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J23/78B01J23/80C07D307/06
CPCB01J23/002B01J23/755B01J23/78B01J23/80B01J2523/00C07D307/06B01J2523/23B01J2523/41B01J2523/847B01J2523/22
Inventor 张雅静李春艳王康军刘利东
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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