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

Synthesis of fire retardant tri (bromophenoxy) cyanurate

A technology of bromophenoxy and cyanurate, applied in the direction of organic chemistry, can solve the problems of large environmental pollution, high cost, and large amount of solvents, and achieve the effect of high safety factor and low cost

Inactive Publication Date: 2008-07-02
NANJING NORMAL UNIVERSITY +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Method 1, the solvents used are organic solvents with low boiling points, which are easy to volatilize and cause great pollution to the environment
When using a single solvent, the amount of solvent required is more and the product yield is lower
Because the organic solvent is volatile, the loss is large and the recovery is small, and the cost of the product is relatively high
In addition, these organic solvents are flammable and explosive substances, which reduces the safety factor of the reaction process.
[0004] Method two, the solvent used is the mixed solvent of dichloromethane and water, although the consumption of organic solvent is reduced, the cost of product is reduced, but because dichloromethane is also flammable and explosive chemicals, still exists in the whole reaction process Security risks

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 fire retardant tri (bromophenoxy) cyanurate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 is equipped with agitator, reflux condenser, thermometer, in the reaction flask of constant pressure dropping funnel, add 19.92g tribromophenol, 2.7g sodium hydroxide, 0.5g n-tetrabutylammonium bromide, 52gH 2 O, stir. Dissolve 3.7g of cyanuric chloride in 30ml of chloroform, add the cyanuric chloride chloroform solution dropwise at 20°C to 35°C, and continue the reaction at 40°C to 55°C for 60 minutes after the dropwise addition is completed. Then the solvent was distilled off. Filter, wash with water twice, filter and dry to obtain a white product. The yield is 95%.

Embodiment 2

[0018] Embodiment 2 In the reaction flask that stirrer, reflux condenser, thermometer are housed, constant pressure dropping funnel, add 15.16g dibromophenol, 2.7g sodium hydroxide, 0.5g triethyl benzyl ammonium chloride, 52gH 2 O, stir. Dissolve 3.7g of cyanuric chloride in 25ml of chloroform, add the cyanuric chloride chloroform solution dropwise at 20°C to 35°C, and continue the reaction for 60min after the dropwise addition is completed. Then the solvent was distilled off. Filter, wash with water twice, filter and dry to obtain a white product. The yield is 95%.

Embodiment 3

[0019] Embodiment 3 In the reaction flask equipped with stirrer, reflux condenser, thermometer, and constant pressure dropping funnel, add 10.38g monobromophenol, 2.7g sodium hydroxide, 0.3g triphenylethylphosphonium bromide, 52gH 2 O, stir. Dissolve 3.7g of cyanuric chloride in 20ml of chloroform, add the cyanuric chloride chloroform solution dropwise at 20°C to 35°C, and continue the reaction for 60min after the dropwise addition is completed. Then the solvent was distilled off. Filter, wash with water twice, filter and dry to obtain a white product. The yield is 95%.

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 synthesis of fire retardant tri(bromophenoxy) cyanurate inside two-phase solution of water solution and organic solvent includes the following steps: reaction of bromized phenol and sodium hydroxide to produce bromized phenol sodium; and the reaction of bromized phenol sodium and cyanurichloride in the presence of catalyst and at proper temperature to produce tri(bromophenoxy) cyanurate. The catalyst is quaternary ammonium salt and quaternary phosphonium salt, and the proper temperature includes cyanurichloride dropping temperature of 20-35 deg.c and reaction temperature after finishing dropping of 40-55 deg.c. The bromized phenol may be bromophenol, dibromophenol or tribromophenol. The synthesis process of the present invention has high safety and low cost and is suitable for industrial production.

Description

technical field [0001] The invention relates to a method for synthesizing a flame retardant, in particular to a method for synthesizing a flame retardant tris(bromophenoxy)cyanurate. Background technique [0002] Tris(bromophenoxy)cyanurate is an existing flame retardant. From the data currently available, there are two methods for synthesizing this product: (1) using tribromophenol and cyanuric chloride as raw materials, organic solvents such as acetone or ethyl acetate or ethanol as solvents, sodium hydroxide Make a catalyst to synthesize the target product. (2) Tribromophenol is first reacted with aqueous sodium hydroxide solution to make sodium tribromophenolate aqueous solution, and then reacts with cyanuric chloride dichloromethane solution to obtain the target product. [0003] Method 1, the solvents used are all low-boiling organic solvents, which are easy to volatilize and cause great pollution to the environment. When using a single solvent, the amount of solven...

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): C09K21/10C07D251/34
Inventor 杨锦飞章庚柱顾慧丹李戈华黄东平
Owner NANJING NORMAL UNIVERSITY
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