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Magnetic organic solid base catalyst as well as preparation method and application thereof

A technology of organic solid and alkali catalysts, applied in the direction of organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as non-reusable, prolong service life, Easy to separate and maintain high efficiency

Inactive Publication Date: 2018-08-17
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the organic base is a homogeneous catalyst that requires cumbersome procedures to remove from the product after the reaction and cannot be reused

Method used

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  • Magnetic organic solid base catalyst as well as preparation method and application thereof
  • Magnetic organic solid base catalyst as well as preparation method and application thereof
  • Magnetic organic solid base catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]Add 7.95g of ferrous chloride tetrahydrate, 16.16g of ferric nitrate nonahydrate and 144mL of water into the reactor, mechanically stir to dissolve, pass nitrogen gas for 30min, then add 30mL of ammonia water and 3.4g of oleic acid dropwise, and react at 80°C for 4h. Magnetic separation of Fe 3 o 4 , and washed to neutral with deionized water to obtain Fe 3 o 4 The magnetic core, mixed with n-octane and dried over anhydrous sodium sulfate, gave Fe 3 o 4 ferrofluid.

[0046] Weigh 7.5g of magnetic fluid, 6.83g of styrene, 0.68g of divinylbenzene, 3.3g of p-chloromethylstyrene, and 0.285g of n-hexadecane to form an oil phase, and ultrasonically disperse for 10 minutes. Weigh 1.35g of sodium lauryl sulfate and dissolve it in 135mL of deionized water to obtain a water phase. Under mechanical stirring, add the oil phase into the water phase drop by drop, and stir for 2 hours to obtain a black oil drop suspension. Micro-emulsify in an ice bath for 10 min to obtain a unif...

Embodiment 2

[0050] Add 7.95g of ferrous chloride tetrahydrate, 16.16g of ferric nitrate nonahydrate and 144mL of water into the reactor, mechanically stir to dissolve, pass nitrogen gas for 30min, then add 30mL of ammonia water and 3.4g of oleic acid dropwise, and react at 80°C for 4h. Magnetic separation of Fe 3 o 4 , and washed to neutral with deionized water to obtain Fe 3 o 4 The magnetic core, mixed with n-octane and dried over anhydrous sodium sulfate, gave Fe 3 o 4 ferrofluid.

[0051] Weigh 7.5g of magnetic fluid, 3.4g of styrene, 0.76g of divinylbenzene, 3.3g of p-chloromethylstyrene, and 0.57g of n-hexadecane to form an oil phase, and ultrasonically disperse for 10 minutes. Weigh 1.35g of sodium lauryl sulfate and dissolve it in 135mL of deionized water to obtain a water phase. Under mechanical stirring, add the oil phase into the water phase drop by drop, and stir for 2 hours to obtain a black oil drop suspension. Micro-emulsify in an ice bath for 10 min to obtain a unifo...

Embodiment 3

[0055] Add 5.07g of ferrous chloride, 6.49g of ferric chloride and 144mL of water into the reactor, mechanically stir to dissolve, pass nitrogen gas for 30min, then add 30mL of ammonia water and 3.4g of oleic acid dropwise, and react at 80°C for 4h. Magnetic separation of Fe 3 o 4 , and washed to neutral with deionized water to obtain Fe 3 o 4 The magnetic core, mixed with n-octane and dried over anhydrous sodium sulfate, gave Fe 3 o 4 ferrofluid.

[0056] Weigh 7.5g of magnetic fluid, 6.83g of styrene, 0.68g of divinylbenzene, 3.3g of p-chloromethylstyrene, and 0.285g of n-hexadecane to form an oil phase, and ultrasonically disperse for 10 minutes. Weigh 1.35g of sodium lauryl sulfate and dissolve it in 169mL of deionized water to obtain a water phase. Under mechanical stirring, add the oil phase into the water phase drop by drop, and stir for 2 hours to obtain a black oil drop suspension. Micro-emulsify in an ice bath for 10 min to obtain a uniform and stable micro-emu...

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PUM

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Abstract

The invention provides a magnetic organic solid base catalyst. Magnetic nanospheres with a uniform particle size are prepared by miniemulsion polymerization, and an organic base is supported on the microspheres to obtain the novel magnetic organic solid base catalyst. The method provided by the invention avoids the problem of loss of active sites of a conventional supported catalyst, maintains high efficiency of the catalyst, and effectively prolongs service life of the catalyst; at the same time, separation of the catalyst and a reaction system can be realized under an external magnetic field, and a separation step of the catalyst is greatly simplified; the magnetic organic solid base catalyst can be applied to a transesterification, esterification or aldol condensation reaction; and thepreparation method provided by the invention is simple, and the prepared catalyst has the characteristics of having high efficiency, saving energy, and being non-toxic, easy to separate and recyclable.

Description

(1) Technical field [0001] The invention relates to a magnetic organic solid base catalyst and its preparation method and application. (2) Technical background [0002] Alkali catalysts are commonly used catalysts in chemical production and basic research, and are widely used in important chemical reactions, such as alkylation reactions, reduction reactions, amination reactions, Aldol condensation, Knoevenagel condensation, Henry reaction, Michael addition, transesterification reaction, etc. Traditional homogeneous liquid alkali catalysts are highly corrosive, and the separation steps after the reaction are cumbersome and produce a large amount of waste liquid, causing serious damage to the ecological environment, which can no longer meet the requirements of green chemistry and sustainable development. [0003] Compared with homogeneous catalysts, heterogeneous catalysts have higher reactivity, better reaction selectivity, mild reaction conditions, and can be simply separat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J31/06C11C3/10
CPCC11C3/10B01J31/0235B01J31/0237B01J31/0239B01J31/0244B01J31/0251B01J31/069B01J2231/49B01J35/33
Inventor 王建黎汤骏张祺胡克成
Owner ZHEJIANG UNIV OF TECH
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