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Process for synthesizing 2, 4'-dihydroxy diphenyl sulfone

A dihydroxydiphenyl sulfone and process technology, applied in the field of synthesis, can solve the problems of expensive catalyst, inconvenient source of raw materials, complicated operation, etc., and achieve the effects of easy acquisition, increased yield, and simple process operation

Inactive Publication Date: 2017-07-28
南通沃兰化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current common synthetic methods are more complicated to operate, some of the catalysts are more expensive, and the source of raw materials is inconvenient, which restricts its application.

Method used

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  • Process for synthesizing 2, 4'-dihydroxy diphenyl sulfone

Examples

Experimental program
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Effect test

Embodiment 1

[0025] First prepare nano-magnetic Y2O3 / Fe3O4 catalyst, the steps are as follows:

[0026] Step 1. Mix 1mol / LFeCl3 3H2O and 1mol / LFeCl3 5H2O solutions in equal volumes and perform ultrasonic treatment for 2 hours, then infrared treatment for 3 hours;

[0027] Step 2. Then add 5% sodium hydroxide solution dropwise to the above solution, turn on magnetic stirring at the same time, heat in an oil bath at 100°C for 3 hours, use a pH meter to detect the pH of the solution, and control the pH value at 11;

[0028] Step 3, then the above solution is transferred to a microwave reactor under a nitrogen atmosphere to react for 3h;

[0029] Step 4. After the microwave treatment is completed, the nano-magnetic particles are separated by using a magnetic field, and then rinsed with deionized water and then with an ethanol solution, and dried at 110° C. for 2 hours under a rotary evaporator;

[0030] Step 5, then calcining the dried nano-magnetic particles in a muffle furnace in a mixed ga...

Embodiment 2

[0043] Example 2 Prepare a sample with a mass ratio of 48:5 between phenol and self-made nano-magnetic Y2O3 / Fe3O4 catalyst. Phenol 48g, self-made nano-magnetic catalyst 5g, other raw material consumption, operation steps are the same with embodiment 1.

Embodiment 3

[0044] Example 3 Prepare a sample with a mass ratio of 40:5 between phenol and self-made nano-magnetic Y2O3 / Fe3O4 catalyst. Phenol 40g, self-made nano magnetic catalyst 5g, other raw material consumption, operation steps are the same with embodiment 1.

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Abstract

The invention discloses a process for synthesizing 2, 4'-dihydroxy diphenyl sulfone. The process includes: subjecting phenol, concentrated sulfuric acid, m-dichlorotoluene, chlorotoluene and self-made nano magnetic Y2O3 / Fe3O4 catalyst serving as raw materials to recrystallization, magnetic stirring, infrared treatment and ultrasonic oscillation to obtain 2, 4'-dihydroxy diphenyl sulfone.

Description

technical field [0001] The invention relates to a process for synthesizing 2,4'-dihydroxydiphenyl sulfone, which belongs to the field of organic synthesis. Background technique [0002] 2,4'-Dihydroxydiphenylsulfone (2,4'-BPS) is a white crystal. It can not only be used as a lubricant for tanning, metal processing, and bactericidal and antibacterial agents, but it is also widely used as a color developer for thermal recording paper, making it have excellent light resistance, oil resistance, and adsorption resistance. The performance of 4,4'-dihydroxydiphenylsulfone (4,4'-BPS) is better. However, the commonly used synthetic methods are relatively complicated to operate, some catalysts are relatively expensive, and the source of raw materials is inconvenient, which restricts its application. I invented a new synthesis process, using self-made nano-magnetic Y2O3 / Fe3O4 catalyst, simple operation, high yield and purity. Contents of the invention [0003] Aiming at the proble...

Claims

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Application Information

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IPC IPC(8): C07C315/00C07C317/22B01J23/83
CPCC07C315/00B01J23/002B01J23/83C07C317/22
Inventor 孙强吴建国万海兵
Owner 南通沃兰化工有限公司
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