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Novel process for producing hexabromocyclododecane

A hexabromocyclododecane, a new process technology, applied in the field of haloalkane synthesis and production, can solve the problems of high thermal decomposition temperature, achieve high solubility, increase the concentration of bromide anions, and reduce unit consumption

Inactive Publication Date: 2008-03-12
HUAIHAI INST OF TECH +1
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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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Embodiment Construction

[0015] 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.

[0016] 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 present invention provides a new method to produce hexabromocyclododecane, which belongs to the synthesizing and manufacturing technology field for halogenating alkyl and hydrocarbon. The new manufacturing process for the hexabromocyclododecane is that: the hexabromocyclododecane solution material is prepared by the synthesizing reaction between 1,5,9-cyclododecatriene and bromide under the catalyzing function of bromination ammonium ammonium salt in an organic solution. The hexabromocyclododecane solution material after being washed, decolored and debromined is to be made with a separating process or an emulsification process in the mixing solution between surface active agent and the water. The separated solution or the emulsification solution for being prepared is to be heated to get rid of the organic solution. So the powder-shaped or the grain-shaped hexabromocyclododecane will be directly obtained.

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