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Preparation method and application of solid acid catalyst

A solid acid catalyst and reaction technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve problems such as environmental pollution of saponin extraction, and achieve significant economic and environmental benefits, increasing saponin yield, and strong practicability

Active Publication Date: 2020-04-10
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of method reduces the amount of acid to a certain extent, it does not fundamentally solve the environmental pollution problem of extracting saponin

Method used

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  • Preparation method and application of solid acid catalyst
  • Preparation method and application of solid acid catalyst
  • Preparation method and application of solid acid catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The method steps of this embodiment are as follows: take 5 g of sodium allyl sulfonate N, 1 g of N dimethylbisacrylamide and put it in a 250 ml three-neck flask, measure 40 ml of deionized water and 80 ml of absolute ethanol with a graduated cylinder, and pour into a three-necked flask, N 2 Add 1.5g styrene under protection, mechanically stir and heat up to 80°C, add 0.5g potassium persulfate after 15 minutes of reaction, continue to stir and react at 80°C for 7h, after the reaction is completed, pour the reaction solution into a beaker, and wash it centrifugally with distilled water After soaking in excess hydrochloric acid solution for one night, the acidic reaction solution was washed with deionized water and ethanol until neutral, and finally soaked in ethanol for one night and then vacuum-dried at 60°C to obtain 1.3765 g of a solid acid catalyst.

Embodiment 2

[0032] The method steps of this embodiment are as follows: take 5.0088 g of sodium allyl sulfonate and 1.0347 g of N,N dimethylbisacrylamide in a 250 ml three-necked flask, measure 40 ml of deionized water and 80 ml of anhydrous Pour water and ethanol into a three-necked flask, N 2 Add 3.5g styrene under protection, mechanically stir and heat up to 80°C, add 0.5g potassium persulfate after 10 minutes of reaction, continue to stir and react at 80°C for 6h, after the reaction is completed, pour the reaction solution into a beaker, and wash it with distilled water After soaking in excess hydrochloric acid solution for one night, the acidic reaction solution was washed with deionized water and ethanol to neutrality, and finally soaked in ethanol for one night and then vacuum-dried at 60°C to obtain 5.5 g of a solid acid catalyst.

Embodiment 3

[0034] The method steps of this embodiment are as follows: take 4.0137 g of sodium allyl sulfonate and 1.0445 g of N, N dimethylbisacrylamide in a 250 ml three-necked flask, measure 30 ml of deionized water and 60 ml of anhydrous Pour water and ethanol into a three-necked flask, N 2 Add 1.6g styrene under protection, mechanically stir and heat up to 70°C, add 0.4g potassium persulfate after 10 minutes of reaction, continue to stir and react at 70°C for 9h, after the reaction is completed, pour the reaction solution into a beaker, and centrifugally wash with distilled water After soaking in excess hydrochloric acid solution for one night, the acidic reaction solution was washed with deionized water and ethanol until neutral, and finally soaked in ethanol for one night and then vacuum-dried at 60°C to obtain 1.3 g of a solid acid catalyst.

[0035] In order to investigate the alcoholysis activity effect of the solid acid catalyst prepared by the present invention, the present in...

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Abstract

The invention discloses a preparation method and application of a solid acid catalyst, and the solid acid catalyst prepared by the preparation method is a novel heterogeneous catalyst, has the characteristics of easy separation and reutilization while providing acid capacity, and conforms to the development concept of green chemistry. In the aspect of synthesis technology, the synthesis method issimple, reaction conditions are mild, experimental operation is safe, and no corrosion damage is caused to equipment. Besides, compared with the traditional inorganic acid, the solid acid catalyst notonly has small pollution, but also has high saponin extraction rate, so that the solid acid catalyst has wide application prospect in the chemical industry.

Description

technical field [0001] The invention relates to the technical field of solid acid catalysts, in particular to a preparation method and application of a solid acid catalyst. Background technique [0002] Diosgenin, also known as saponin, is commonly found in the rhizomes of plants represented by yams (turmeric, yam, etc.). Dioscin has various pharmacological effects such as hemolysis, blood lipid lowering, anti-inflammatory and antibacterial, etc. In addition, it is also the basic pharmaceutical raw material for the synthesis and production of four major categories of steroid hormone drugs, including anabolic hormone, adrenocortical hormone, sex hormone, and progesterone. It is used to treat cardiovascular and cerebrovascular diseases, rheumatoid arthritis and other diseases, and has very important pharmacological value in the pharmaceutical industry. [0003] The traditional method of extracting saponin is inorganic acid hydrolysis, but the hydrolysis reaction of inorganic ...

Claims

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Application Information

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IPC IPC(8): B01J31/10C08F228/02C08F212/08C08F222/38C07J71/00
CPCB01J31/10C08F228/02C07J71/0005C08F212/08C08F222/385Y02P20/584
Inventor 周红袁汇潘志权
Owner WUHAN INSTITUTE OF TECHNOLOGY
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