Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of green synthesis technology of 2,4-dihydroxybenzophenone

A technology of dihydroxybenzophenone and synthesis process, which is applied in the direction of condensation preparation of carbonyl compounds, physical/chemical process catalysts, organic chemistry, etc., and can solve the problems of HCl acid mist, waste water and exhaust gas discharge, equipment corrosion, etc.

Active Publication Date: 2021-06-11
优普生物科技湖北有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to eliminate its influence, water and AlCl are often used 3 Hydrolysis reaction occurs, but this will generate HCl acid mist, waste water and exhaust gas discharge, equipment corrosion and other problems

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
  • A kind of green synthesis technology of 2,4-dihydroxybenzophenone
  • A kind of green synthesis technology of 2,4-dihydroxybenzophenone
  • A kind of green synthesis technology of 2,4-dihydroxybenzophenone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 1.76g resorcinol, 2.26g benzoic anhydride, 0.16gBiCl 3 . Dissolve resorcinol in ethanol at room temperature to form 60°C saturated solution a, and dissolve benzoic anhydride in ethanol to form 60°C saturated solution b. BiCl 3 Put the saturated solution a in the reactor, stir and add the saturated solution b dropwise to it, and fully react at 73°C for 4 hours. After the reaction, cool to 5°C, filter, recrystallize and refine the filter residue with an organic solvent of ethanol:water=4:1 (volume ratio, the same below), weigh 3.23g after drying, and detect 2,4- The content of dihydroxybenzophenone is 99.45%, and the yield is 94.42%.

Embodiment 2

[0039] Weigh 2.03g resorcinol, 2.26g benzoic anhydride, 0.17gBiCl 3 . Dissolve resorcinol in ethanol at room temperature to form 60°C saturated solution a, and dissolve benzoic anhydride in ethanol to form 60°C saturated solution b. BiCl 3 and saturated solution a are placed in a reactor, stirred, and saturated solution b is added dropwise thereinto, and fully reacted at 73° C. for 4 hours. After the reaction, cool to 5°C, filter, recrystallize and refine the filter residue with an organic solvent of ethanol:water=4:1, then dry it and weigh 3.75g, and detect 2,4-dihydroxybenzophenone by HPLC The content of ketone is 99.38%, and the yield is 94.63%.

Embodiment 3

[0041] Weigh 2.20g resorcinol, 2.260g benzoic anhydride, 0.22gBiCl 3 . Dissolve resorcinol in ethanol at 60°C to form a saturated solution a, and dissolve benzoic anhydride in ethanol to form a 60°C saturated solution b. BiCl 3 Put the saturated solution a in the reactor, stir and add the saturated solution b dropwise to it, and fully react at 73°C for 4 hours. After the reaction, cool to 5°C, filter, recrystallize and refine the filter residue with an organic solvent of ethanol:water=4:1, weigh 4.03g after drying, and detect 2,4-dihydroxybenzophenone by HPLC The content of ketone is 99.20%, and the yield is 94.22%.

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 belongs to the field of fine chemical industry and discloses a new process for synthesizing 2,4-dihydroxybenzophenone ultraviolet absorber. The steps are as follows: drop into the ethanol saturated solution of resorcinol and a certain amount of catalyst BiCl in the reaction vessel 3 or doped with 5% (w / w) CeO 2 Composite HZSM‑5 zeolite catalyst, add the saturated ethanol solution of benzoic anhydride drop by drop under good stirring, reflux at 60~80°C for a certain period of time, stop heating, and precipitate solid matter. Follow-up treatment is carried out according to the selected catalyst, the catalyst and the crude product are separated, and the crude product is recrystallized with a mixture of ethanol and water to obtain the finished product 2,4-dihydroxybenzophenone. The invention uses low-toxicity and low-hazard raw materials and reagents, and the novel catalyst adopted has the characteristics of easy separation and recovery, simple process in the whole reaction process and little environmental pollution, and the synthesized 2,4-dihydroxybenzophenone The purity can reach more than 99%, and the yield can reach more than 94%. It is suitable as a light stabilizer for polyvinyl chloride, polystyrene, epoxy resin, cellulose resin, unsaturated resin, paint, and synthetic rubber.

Description

technical field [0001] The invention belongs to the field of fine organic chemical industry, and specifically relates to a new process for synthesizing 2,4-dihydroxybenzophenone ultraviolet absorber. Background technique [0002] Ultraviolet absorbers can absorb the ultraviolet rays in sunlight and fluorescent light sources, and solve the problem of product surface fading. The research and development of new electronic chemicals such as ultraviolet absorbers and photoresists has become a hot spot in the fine chemical industry at home and abroad recently. 2,4-dihydroxybenzophenone is a high-efficiency ultraviolet absorber, also known as UV-O, which belongs to the series of benzophenone ultraviolet absorbers. Due to its good comprehensive performance, low price and wide application range, It occupies an important position in ultraviolet absorbers and is widely used in polymer materials, coatings (automobile spray paint, building finish), printing ink, post-treatment of dyed / p...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C07C45/46C07C49/83B01J27/10B01J29/40
CPCC07C45/46B01J27/10B01J29/405B01J2229/18C07C49/83Y02P20/584
Inventor 程正载葛睿曾胜王涵鼎郑紫琴姜佳文胡海刘盼盼李光要关鹏程董卫马里奥·高斯尔
Owner 优普生物科技湖北有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com