Synthesis of diphenols

A technology for biphenol and synthesis process, applied in the field of biphenol synthesis technology, can solve problems such as unsatisfactory purity and yield, difficulty in handling, difficult production environment, etc., and achieve the effects of high industrialization value, simple method and mild conditions

Pending Publication Date: 2021-02-19
HEILONGJIANG UNIV OF CHINESE MEDICINE +2
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is not ideal in terms of both purity and yield
The use of high temperature and post-treatment in the reaction process is relatively difficult for the production environment in the operation process, and the safet...

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Synthesis of diphenols
  • Synthesis of diphenols
  • Synthesis of diphenols

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] Add 150ml of dichloroethane, 30.8g of biphenyl and 15.7g of acetyl chloride into a 500ml four-neck flask, add 28.8g of aluminum trichloride in batches under ice cooling, and control the temperature between 0-10°C. Continue stirring for 0.5 hours after the addition, remove the ice bath, naturally warm up to room temperature and continue stirring for 0.5 hours, and monitor the liquid phase. After the reaction, the resulting solution was poured into 150 ml of ice water, stirred for 20 min, and allowed to stand to separate layers. The lower layer was washed with water, about 1 / 3 of the organic layer was evaporated, and the remaining residue was directly used for the next reaction.

[0110] Add the solution after the reaction treatment in the previous step, 40g of maleic anhydride, and 100ml of dichloroethane into a 500ml four-necked bottle, lower the temperature below 10°C, add 27.2g of 50% hydrogen peroxide dropwise, and control the temperature between 0-10°C. Continue to...

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

PUM

No PUM Login to view more

Abstract

The invention discloses a green process route of diphenol. Biphenyl is subjected to a Friedel-Crafts acylation reaction to prepare acetobiphenyl, aluminum trichloride-containing wastewater generated by Friedel-Crafts acylation hydrolysis is treated to obtain polyaluminum chloride, and the polyaluminum chloride is widely used for sewage treatment. Baeyer-Villiger oxidation rearrangement reaction isperformed on the obtained acetophenone to obtain biphenyl acetate, an oxidant used in the Baeyer-Villiger oxidation rearrangement reaction is a maleic anhydride/hydrogen peroxide system, and maleic acid serving as a reaction byproduct is dehydrated to obtain maleic anhydride again, so that the reutilization of the oxidant is realized. Finally, the biphenyl acetate is hydrolyzed by alkali to obtain the final product diphenol. The synthetic process designed by the invention is a safe, green and environment-friendly process route, the reaction is mild, the reaction process is controllable, and the industrial value is very high.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a synthesis process of biphenol. Background technique [0002] Biphenol, also known as p-phenylphenol, has the molecular formula C 6 h 5 C 6 h 4 OH, its structural formula is: [0003] [0004] Biphenol is a nearly white crystal, insoluble in water, soluble in ethanol, caustic soda solution and many organic solvents. Biphenol is an important new fine chemical intermediate. The red light sensitization and green light sensitization dyes synthesized by this product are one of the main raw materials of color film, and can be used as analytical reagents; it can also be used to make oil-soluble resins and emulsifiers , used as a component of corrosion-resistant paint, a carrier for printing and dyeing, etc. On the whole, biphenol is widely used in dyes, pesticides, preservatives, coatings, printing and dyeing auxiliaries, photosensitive materials and othe...

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

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C07C39/15C07C37/055
CPCC07C37/0555C07C67/00C07C45/65C07C39/15C07C69/157C07C49/784
Inventor 黄楠楠徐永海姚林山牛立中
Owner HEILONGJIANG UNIV OF CHINESE MEDICINE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap