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Production process for synthesizing n-octyl bromide

A technology for bromo-n-octane and production process, which is applied in the field of production technology for bromo-n-octane synthesis, can solve the problems of cumbersome production equipment and post-processing, complex production process, serious environmental pollution and the like, and achieves easy operation, purity The effect of high and low equipment investment

Inactive Publication Date: 2014-10-08
蚌埠团结日用化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Insoluble in water, miscible with alcohol and ether, with a melting point of -55°C, a boiling point of 201°C, a density of 1.112, a refractive index of 1.451, and a flash point of 92. Brominated n-octane is an important organic fine chemical intermediate. It is mainly used in the synthesis of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether and other surfactants, and is also the main raw material for the synthesis of ultraviolet absorber 2-hydroxy-4-n-octyloxybenzophenone, but the current industrial production The method of brominated n-octane is still a relatively traditional method, the production equipment and post-treatment are relatively cumbersome, and the environmental pollution is also relatively serious. In this traditional production method in industry, there are problems such as low yield, low purity and serious pollution. , and the production process is relatively complicated, it is difficult to meet the needs of human beings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A production process for the synthesis of brominated n-octane, comprising the following process steps,

[0016] a. Select a 250ml three-necked flask provided with a stirrer and a reflux condenser, and add 21-22ml of n-octanol to the inside of the flask.

[0017] b. Constantly stir the reaction liquid in the above step a, and add 10ml of concentrated sulfuric acid, 30ml of 40.0% hydrogen bromide aqueous solution and 0.1g of tetrabutylammonium bromide to it, and heat to reflux and stir for 3.0h.

[0018] c. After the reaction in the above step b is completed, cool it down. After cooling down, separate the acid layer inside, and then add 5ml of concentrated sulfuric acid to shake it fully.

[0019] d. The concentrated sulfuric acid is separated after the reaction solution in the step c is allowed to stand, and the remaining bromide is mixed with an equal volume of 50.0% aqueous methanol.

[0020] e. Add concentrated ammonia water dropwise to the reaction solution in the a...

Embodiment 2

[0023] A production process for the synthesis of brominated n-octane, comprising the following process steps,

[0024] a. Select a 250ml three-necked flask provided with a stirrer and a reflux condenser, and add 21.5ml of n-octanol to the inside of the flask.

[0025] b. Constantly stir the reaction feed liquid in the above step a, and add 12ml of concentrated sulfuric acid, 30.3ml of 40.0% hydrogen bromide aqueous solution and 0.11g of tetrabutylammonium bromide to the inside, heat and reflux and stir for 3.0h .

[0026] c. After the reaction in the above step b is completed, cool it down. After cooling down, separate the acid layer inside, and then add 8ml of concentrated sulfuric acid to shake it fully.

[0027] d. The concentrated sulfuric acid is separated after the reaction solution in the step c is allowed to stand, and the remaining bromide is mixed with an equal volume of 50.0% aqueous methanol.

[0028] e. Add concentrated ammonia water dropwise to the reaction sol...

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Abstract

The invention discloses a production process for synthesizing n-octyl bromide, and relates to the technical field of chemical industry. The n-octyl bromide is obtained by performing a reaction on n-octyl alcohol, concentrated sulfuric acid, a hydrogen bromide aqueous solution and tetrabutylammonium bromide. The production process has the beneficial effects of convenience and easiness in preparation, environmental friendliness, freeness from pollution, adoption of readily-available raw materials, small equipment investment, high purity and convenience in operation; and prepared n-octyl bromide has a good use effect, and is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a production process for synthesizing brominated n-octane. Background technique [0002] Brominated n-octane is a colorless and transparent liquid. Insoluble in water, miscible with alcohol and ether, with a melting point of -55°C, a boiling point of 201°C, a density of 1.112, a refractive index of 1.451, and a flash point of 92. Brominated n-octane is an important organic fine chemical intermediate. It is mainly used in the synthesis of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether and other surfactants, and is also the main raw material for the synthesis of ultraviolet absorber 2-hydroxy-4-n-octyloxybenzophenone, but the current industrial production The method of brominated n-octane is still a relatively traditional method, the production equipment and post-treatment are relatively cumbersome, and the environmental pollution is also relative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C19/075C07C17/16
Inventor 徐德平
Owner 蚌埠团结日用化学有限公司
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