Preparation method of load type silicotungstic acid catalyst and its use in preparing tetrahydrofurane

A technology of silicotungstic acid and catalyst, applied in the direction of organic chemistry, can solve problems such as equipment corrosion, liquid acid catalyst and product separation difficulties, environmental pollution, etc.

Inactive Publication Date: 2005-10-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And take phosphoric acid/sulfuric acid as catalyst, 1,4-butanediol as raw material liquid phase cyclodehydration to prepare tetrahydrofuran process is simple, catalyst activity is hi

Method used

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  • Preparation method of load type silicotungstic acid catalyst and its use in preparing tetrahydrofurane
  • Preparation method of load type silicotungstic acid catalyst and its use in preparing tetrahydrofurane

Examples

Experimental program
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Effect test

Embodiment 1

[0012] Preparation and catalytic activity test of kaolin-supported catalyst containing 5% silicotungstic acid:

[0013] Dissolve 0.5g of silicotungstic acid in 3.6ml of distilled water, and then impregnate it in 9.5g of kaolin. The pore volume of kaolin is equal to the volume of the solution of silicotungstic acid, and the mass percentage of silicotungstic acid in the catalyst is 5%. , kaolin-loaded silicotungstic acid was roasted at 120°C for 2 hours, and stirred every 20 minutes during the roasting process to prepare a kaolin-loaded catalyst containing 5% silicotungstic acid.

[0014] Catalyst activity test method: take 150 ml of 1,4-butanediol and heat it to 230 ° C and add 0.5 g of catalyst to react, and use gas chromatography to analyze the rectified product and the reactant in the reactor as the reaction progresses. The 1,4-butanediol and THF concentrations were used to calculate the conversion and selectivity. Such as figure 1 As shown, the conversion and selectivity ...

Embodiment 2

[0016] Preparation and catalytic activity test of kaolin-supported catalyst containing 15% silicotungstic acid:

[0017] Dissolve 1.5g of silicotungstic acid in 3.22ml of distilled water, and then soak it in 8.5g of kaolin. The pore volume of kaolin is equal to the volume of the solution of silicotungstic acid, and the mass percentage of silicotungstic acid in the catalyst is 15%. , kaolin-loaded silicotungstic acid was roasted at 180°C for 4 hours, and stirred every 30 minutes during the roasting process to prepare a kaolin-loaded catalyst containing 15% silicotungstic acid.

[0018] Catalyst activity test method: take 150 ml of 1,4-butanediol and heat it to 230 ° C and add 0.5 g of catalyst to react, and use gas chromatography to analyze the rectified product and the reactant in the reactor as the reaction progresses. The 1,4-butanediol and THF concentrations were used to calculate the conversion and selectivity. Such as figure 1 As shown, the reaction time of kaolin conta...

Embodiment 3

[0021] Preparation and catalytic activity test of diatomite-supported catalyst containing 25% silicotungstic acid:

[0022] Dissolve 2.5g of silicotungstic acid in 5.28ml of distilled water, and then immerse in 7.5g of diatomite. The pore volume of diatomite is equal to the volume of the solution of silicotungstic acid, and the mass of silicotungstic acid in the catalyst is 100%. content of 25%, silicotungstic acid supported by diatomaceous earth was roasted at 220°C for 6 hours, and stirred every 40 minutes during the roasting process to prepare 25% silicotungstic acid supported by diatomite.

[0023] Catalyst activity test method: take 150 ml of 1,4-butanediol and heat it to 230 ° C and add 0.5 g of catalyst to react, and use gas chromatography to analyze the rectified product and the reactant in the reactor as the reaction progresses. The 1,4-butanediol and THF concentrations were used to calculate the conversion and selectivity. Such as figure 1 As shown, the reaction ti...

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Abstract

A carried silicotungstic acid as catalyst used for preparing tetrahydrofuran from 1,4-butanediol through cyclizing and dewatering is prepared through dissolving silicotungstic acid in distilled water, isometrically immersing the carrier (kaolin or diatomite) in it, and calcining while stirring every 20-40 min.

Description

technical field [0001] The invention relates to a preparation method and application of a catalyst, in particular to a preparation method of a loaded silicotungstic acid catalyst and its use for preparing tetrahydrofuran. Background technique [0002] Tetrahydrofuran is a kind of high polarity, low boiling point excellent low toxicity solvent, widely used as a solvent for surface coatings, anti-corrosion coatings and film coatings, its most important use is to produce polytetramethylene ether glycol (PTMEG), Polyurethane elastomer and polyurethane artificial leather, etc. It is also used as a solvent in esterification and polymerization reactions, and as a raw material for synthesizing some hormone drugs in medicine. [0003] In my country, the furfural method is mainly used to produce tetrahydrofuran. This method consumes a lot of raw materials, the process is complicated, the scale of the device is small, the output is small, and the environmental pollution is serious. A...

Claims

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Application Information

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IPC IPC(8): B01J23/30
Inventor 殷恒波李海霞胡童杰姜本鹏姜廷顺谢吉民
Owner JIANGSU UNIV
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