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Attapulgite-reinforced resin solid acid catalyst and preparation method thereof

The technology of solid acid catalyst and attapulgite is applied in the field of chemical industry, which can solve the problems of easy swelling and deactivation of mechanical properties, and achieve the effect of good anti-swelling performance and high catalytic activity.

Inactive Publication Date: 2017-06-13
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention needs to solve the technical problems of easy swelling and deactivation of traditional acidic ion exchange resin catalysts and poor mechanical properties
The solid acid catalyst is used for the reaction of lactic acid and butyl ester, which has a better catalytic effect than Amberlyst-15; and overcomes the problems of easy swelling and deactivation of traditional acidic ion exchange resin catalysts and poor mechanical properties

Method used

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  • Attapulgite-reinforced resin solid acid catalyst and preparation method thereof
  • Attapulgite-reinforced resin solid acid catalyst and preparation method thereof
  • Attapulgite-reinforced resin solid acid catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Embodiment 1: This embodiment illustrates the method for synthetic solid acid catalyst

[0041] Using attapulgite and other raw materials, the solid acid catalyst was synthesized in the following steps.

[0042] (1) Modification of attapulgite

[0043] Add 3g of attapulgite to 150mL of toluene, add 1mL of deionized water and 0.1g of γ-(methacryloyloxy)propyltrimethoxysilane successively while stirring continuously, and react at 60°C for 14h. The modified attapulgite was washed repeatedly with ethanol, filtered, and then vacuum-dried at 60°C for 12 hours.

[0044] (2) Synthesis and sulfonation of attapulgite / polystyrene microspheres

[0045]Disperse 0.5g of the modified attapulgite in 120mL of deionized water, mix 1mL of divinylbenzene, 4mL of styrene and 0.3g of benzoyl peroxide, and add it to the suspension of attapulgite, homogenize Machine shaking for 30s, then poured into a 250mL three-neck flask, the reaction temperature was 70°C, and polymerized under mechanica...

Embodiment 2

[0052] Embodiment 2: This embodiment illustrates the method for synthetic solid acid catalyst

[0053] Using attapulgite and other raw materials, the solid acid catalyst was synthesized in the following steps.

[0054] (1) Modification of attapulgite

[0055] Add 3g of attapulgite to 150mL of toluene, add 1mL of deionized water and 0.1g of γ-(methacryloyloxy)propyltrimethoxysilane successively while stirring continuously, and react at 70°C for 12h. The modified attapulgite was washed repeatedly with ethanol, filtered, and then vacuum-dried at 60°C for 12 hours.

[0056] (2) Synthesis and sulfonation of attapulgite / polystyrene microspheres

[0057] Disperse 1 g of the modified attapulgite in 120 mL of deionized water, mix 1 mL of divinylbenzene, 4 mL of styrene and 0.3 g of benzoyl peroxide, add it to the suspension of attapulgite, and homogenize Shake for 30s, then pour into a 250mL three-necked flask, and polymerize for 7h under mechanical stirring at a reaction temperatur...

Embodiment 3

[0063] Embodiment 3: This embodiment illustrates the method for synthetic solid acid catalyst

[0064] Using attapulgite and other raw materials, the solid acid catalyst was synthesized in the following steps.

[0065] (1) Modification of attapulgite

[0066] Add 3g of attapulgite to 150mL of toluene, add 1mL of deionized water and 0.1g of γ-(methacryloyloxy)propyltrimethoxysilane successively while stirring continuously, and react at 80°C for 10h. The modified attapulgite was washed repeatedly with ethanol, filtered, and then vacuum-dried at 60°C for 12 hours.

[0067] (2) Synthesis and sulfonation of attapulgite / polystyrene microspheres

[0068] Disperse 1.5g of modified attapulgite in 120mL of deionized water, mix 1mL of divinylbenzene, 4mL of styrene and 0.3g of benzoyl peroxide, and add it to the suspension of attapulgite, homogenize Machine shaking for 30s, then poured into a 250mL three-neck flask, the reaction temperature was 60°C, and polymerized under mechanical s...

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Abstract

The invention discloses a novel attapulgite-reinforced resin catalyst and a preparation method thereof. The novel solid acid catalyst is prepared by suspension polymerization by using attapulgite as an independent dispersing agent. The preparation method comprises the following steps: modifying attapulgite by using a silane coupling agent until the surface has appropriate hydrophilicity / hydrophobicity; synthesizing attapulgite / polystyrene microspheres by using the modified attapulgite as a dispersing agent; and finally, sulfonating by concentrated sulfuric acid to obtain the attapulgite-reinforced resin solid acid catalyst. The structure of the catalyst is determined by Fourier-infrared spectrum and a scanning electron microscope. In the lactic acid-butanol reaction, compared with the Amberlyst-15, the catalyst disclosed by the invention has better properties, stable structure and excellent anti-swelling property.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a novel solid acid catalyst and a preparation method thereof, in particular to a method for preparing a solid acid catalyst by using attapulgite as an inorganic reinforcing material. Background technique [0002] Acid catalysis is widely used in various reactions. Traditional homogeneous liquid acid catalyst, with concentrated H 2 SO 4 As a representative, it has the characteristics of cheap price, good catalytic effect and wide application range. However, in the homogeneous liquid acid catalyst system, the product is difficult to separate from the catalyst, the catalyst cannot be recycled, the system severely corrodes the equipment, and the environment is seriously polluted. [0003] Relatively speaking, solid acid catalysts have distinctive features, such as easy recycling, reusability, and environmental friendliness, and have gradually become a research hotspot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C07C67/08C07C69/68
CPCC07C67/08B01J31/10B01J31/26B01J2231/49B01J35/50C07C69/68
Inventor 余定华黄和冯涛王文娟
Owner NANJING UNIV OF TECH
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