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Decabromodiphenyl oxide preparation technology capable of increasing utilization rate of bromine and device thereof

A technique for preparing decabromodiphenyl ether and a preparation device, which is applied in the field of decabromodiphenyl ether preparation technology and device for improving bromine utilization rate, and can solve problems such as low bromine utilization rate, high bromine steam partial pressure, and easy volatilization, etc. problems, to achieve the effect of easy process, improved utilization rate and low cost

Inactive Publication Date: 2011-11-16
SHOUGUANG WEIDONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Solve the problem of high bromine steam partial pressure, easy volatilization, and low utilization rate of bromine when improving the synthesis of decabromodiphenyl ether

Method used

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  • Decabromodiphenyl oxide preparation technology capable of increasing utilization rate of bromine and device thereof
  • Decabromodiphenyl oxide preparation technology capable of increasing utilization rate of bromine and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The decabromodiphenyl ether synthesis method includes bromination, distillation, post-treatment and recycling processes; the specific steps are as follows:

[0033]

[0034] (1) Bromination: Drop the diphenyl ether into the bromination kettle containing bromine through the ether drop tank;

[0035] (2) Distillation: heat and distill the material, and recover the evaporated bromine. The by-products and evaporated bromine obtained in the above step (1) are condensed by the condenser and then enter the hydrogen bromide absorption device;

[0036] (3) Post-treatment: The hydrogen bromide absorption device uses diphenyl ether as an absorbent to absorb bromine volatilized during the bromination process;

[0037] (4) Recycling: Transfer the diphenyl ether that has absorbed bromine in the above step (3) to the dripping ether tank of the above step (1) as a raw material for the bromination reaction to participate in the bromination reaction, and repeat the above steps cyclica...

Embodiment 2

[0044] Such as figure 1 As shown, a decabromodiphenyl ether preparation device that improves the bromine utilization rate includes a dripping ether tank 1, a bromination kettle 2, and a condenser 3 connected in sequence, and the condenser 3 communicates with the bromine absorption tank 4 , diphenyl ether is housed in the described absorption tank 4.

[0045] The diphenyl ether is dropped into the bromination kettle 2 equipped with bromine through the ether drop tank 1, and the bromination reaction occurs, and the by-products and volatilized bromine enter the absorption tank 4 equipped with diphenyl ether after being condensed by the condenser 3 absorbed. The diphenyl ether that has absorbed bromine and by-products is used as a raw material for the bromination reaction and then enters the bromination kettle 2 for the bromination reaction, which is circulated in sequence.

[0046] In each embodiment of the present invention, the chemical materials used are the materials used i...

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Abstract

The invention discloses a decabromodiphenyl oxide preparation technology capable of increasing the utilization rate of bromine and a device thereof. The technology uses diphenyl ether as an absorbent to absorb the bromine evaporated in the bromination process and ensure that the bromine can be recycled and used in the bromination reaction. The device disclosed by the invention contains an ether-dropping tank, a bromination kettle, a condenser and a hydrogen bromide absorbing device which are communicated in turn. The invention has the following advantages: the utilization rate of bromine can be effectively increased, the unit consumption of bromine is reduced, namely only 1.7-1.8 tons of bromine is used to produce 1 ton of decabromodiphenyl oxide, the unit consumption of bromine can be reduced by 0.3-0.8 ton and 15-30% of bromine can be saved; and the quality of the byproduct hydrobromic acid can be increased, the content of free bromine in hydrobromic acid can be reduced to 0.1%, the consumption of red phosphorus or sulfur can be reduced, the utilization rate of the raw materials can be effectively increased and the production cost can be reduced. Meanwhile, the device has a simple structure, and the technology is easy to operate and has low cost and energy consumption.

Description

technical field [0001] The invention relates to a preparation process and device of decabromodiphenyl ether, in particular to a preparation process and device of decabromodiphenyl ether for improving bromine utilization rate, and belongs to the field of chemical industry. Background technique [0002] Decabromodiphenyl ether is a high-efficiency broad-spectrum additive flame retardant. It is one of the most widely used flame retardants in the world. It is mainly used as an additive flame retardant. High efficiency and wide range of uses, suitable as flame retardant for polyethylene, polypropylene, ABS resin, epoxy resin, PBT resin, silicone rubber, EPDM rubber, polyester fiber, cotton fiber, etc. Since decabromodiphenyl ether has the characteristics of high flame retardant efficiency, wide application range, good heat resistance, and excellent hydrolytic stability, it has a long history of production and application. [0003] According to the traditional method, for every t...

Claims

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Application Information

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IPC IPC(8): C07C43/29C07C41/22C01B7/09
Inventor 袁德洪陈如林丁忠锋刘瑞祥
Owner SHOUGUANG WEIDONG CHEM