Synthetic process of 4,4'-dichlorodiphenyl sulfone

A technology of dichlorodiphenyl sulfone and a synthesis process, which is applied in the field of synthesis technology of 4,4'-dichlorodiphenyl sulfone, can solve the problems of low cost, long reaction time and low melting point of a sulfuric acid method, and achieves post-treatment Easy, low cost, high product purity effect
CN104402780BActive Publication Date: 2016-04-27SHANDONG KAISHENG NEW MATERIALS
6 Cites 19 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG KAISHENG NEW MATERIALS
Publication Date
2016-04-27

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention belongs to the field of organic synthesis, and in particular relates to a synthesis process of 4, 4'-dichlorodiphenyl sulfone. The synthesis process comprises the following steps: firstly, performing a Friedel-Crafts reaction on sulfoxide chloride and chlorobenzene under the action of a catalyst; cooling and hydrolyzing -after the reaction; heating and dissolving ; cooling, separating out crystals and filtering so as to obtain 4, 4'-dichlorodiphenyl sulfoxide; dissolving 4, 4'-dichlorodiphenyl sulfoxide in glacial acetic acid, adding hydrogen peroxide for an oxidizing reaction; lowering the temperature and cooling after the reaction is completed, and filtering so as to obtain 4, 4'-dichlorodiphenyl sulfone. Chlorobenzene is used both as a reaction material and a solvent, and other solvent impurities are not mixed in chlorobenzene, so that after-treatment is easier when the cost is saved, and the product is high in purity. The synthesis process has the advantages of simple process, low cost and few impurities. The obtained product has high purity and has the content of above 99.2% and the yield of above 90%, so that the product is good in economic benefit and is suitable for industrial production.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of organic synthesis, and in particular relates to a synthesis process of 4,4'-dichlorodiphenyl sulfone. Background technique

[0002] 4,4'-Dichlorodiphenylsulfone (DDS) is an important organic synthesis product, the main raw material for the preparation of engineering plastics such as polysulfone and polyethersulfone, and an intermediate for medicine, dyes and pesticides. It can be used to prepare a variety of polymer products, such as resins such as bisphenol A polysulfone, polyphenylene ether sulfone, and polyamide sulfone, and can also be used to prepare 4,4'-diaminodiphenylsulfone, an intermediate of leprosy medicine. With the wide application of polymer materials, the demand for DDS is also increasing.

[0003] There are many ways to produce DDS in industry, mainly including sulfuric acid method, chlorosulfonic acid method, sulfur trioxide method and sulfoxide oxidation method. The sulfuric acid method has low...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More