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Novel process for producing hexabromocyclododecane

A new technology of hexabromocyclododecane, which is applied in the field of synthesis and production of halogenated alkanes, can solve the problem of high thermal decomposition temperature

Inactive Publication Date: 2009-12-02
HUAIHAI INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problem that the five quality indicators of hexabromocyclododecane product yield, purity, melting point, thermal decomposition temperature and bromine content in the above production method do not correspond to the same high problem, and proposes a new production process of hexabromocyclododecane:

Method used

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Examples

Experimental program
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Embodiment Construction

[0023] Adding bromine and desalting and decolorizing process: Take 280 kg of 1,5,9-cyclododecatriene and put it in the high-level tank. Squeeze into 1600 kilograms of chloroform in the reactor, drop into 60 kilograms of tetrabutylammonium bromide, put into 835 kilograms of bromines. Start the reactor to stir, open the reactor coolant valve, keep the material in the reactor at around 30°C, and finely flow 1,5,9-cyclododecatriene into the reactor within 5 hours. After feeding, close the reactor coolant valve. Carry out slaking for 1 hour, add 150 kg of 8% soda ash brine solution to the reaction kettle, and after 1 hour, separate the washing alkali brine to obtain a hexabromocyclododecane chloroform solution, and complete the bromine addition and desalination and decolorization processes.

[0024] Dispersion or emulsification process: start the dispersion tank with 60 kg of alkanolamide and 1500 kg of clear water and stir, pour the hexabromocyclododecane chloroform solution obta...

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Abstract

The invention provides a new process for producing hexabromocyclododecane, which belongs to the technical field of synthesis and production of halogenated alkanes. The new production process of hexabromocyclododecane refers to the production of hexabromocyclododecane through the addition reaction process of 1,5,9-cyclododecatriene and bromine under the catalysis of brominated quaternary ammonium salt catalyst in an organic solvent. Obtain the solution material of hexabromocyclododecane; the hexabromocyclododecane solution material after bromine decolorization and washing completes the dispersion or emulsification process in the mixed solution of surfactant and water; for the prepared dispersion or emulsion Carry out the production process of heating and raising the temperature to remove the organic solvent, so as to directly obtain the powdered or granular hexabromocyclododecane product.

Description

technical field [0001] The invention belongs to the technical field of synthesis and production of halogenated alkanes, in particular to a new process for producing hexabromocyclododecane. technical background [0002] Hexabromocyclododecane (HBCD) is a widely used high-efficiency flame retardant, which can be used for molded or foamed XPS or EPS plastics, and can also be used for flame retardant treatment of textiles in aqueous suspension or latex . US Patent 4783563 discloses in C 3 -C 8 In saturated alcohol, use boron trifluoride etherate complex as catalyst, bromine 1,5,9-cyclododecatriene (CDT) with bromine at around 15°C, and neutralize the reaction product with alkaline aqueous solution After washing, hexabromocyclododecane was recovered with a yield of 88%. U.S. Patent 5043492 discloses again in C 3 -C 8 Adding 5% water to a saturated alcohol solvent can increase the yield of hexabromocyclododecane. U.S. Patent 6284935 discloses that in a mixed solvent of diox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C23/02C07C17/02
Inventor 张田林卜红菲张可人姜培琴
Owner HUAIHAI INST OF TECH