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

Bromobenzene synthesis production process

A production process, bromobenzene technology, applied in the production process field of bromobenzene synthesis, can solve the problems of low yield, complex production process, low purity, etc., and achieve the effects of high purity, easy-to-obtain raw materials, and convenient and simple preparation

Inactive Publication Date: 2014-10-08
安徽佑骏商品混凝土有限公司
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pharmaceutical intermediates, there are problems such as low yield and low purity in the current industrial production, and the production process is relatively complicated, which is difficult to meet the needs of human beings

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of production technology that bromobenzene is synthesized, comprises following processing step,

[0018] a. Weigh 320kg of benzene and 90kg of iron powder.

[0019] b. Put benzene and iron powder into a 1000L enamel reaction kettle, and control the temperature of the reaction kettle at 25°C.

[0020] c. Stir the materials in the enamel reaction kettle, and weigh 640kg of bromine and add it dropwise to the enamel reaction kettle within 6 hours.

[0021] d. When hydrogen bromide gas is generated in the enamel reaction kettle, raise the temperature inside the kettle to 70° C. and keep the reaction at constant temperature for 2 hours.

[0022] e. The mixture after the hydrolysis reaction in step d is added to the oil-water separator, washed with 5% sodium hydroxide solution, and then allowed to stand for stratification.

[0023] f. the oil layer in the step e is dried using anhydrous calcium chloride, then dropped into a rectifying tower and heated to raise the tem...

Embodiment 2

[0026] A kind of production technology that bromobenzene is synthesized, comprises following processing step,

[0027] a. Weigh 330kg of benzene and 100kg of iron powder.

[0028] b. Put benzene and iron powder into a 1000L enamel reaction kettle, and control the temperature of the enamel reaction kettle at 30°C.

[0029] c. Stir the materials in the enamel reaction kettle, and weigh 650kg of bromine and add it dropwise to the enamel reaction kettle within 6 hours.

[0030] d. When hydrogen bromide gas is generated in the enamel reaction kettle, the temperature inside the kettle is raised to 75° C. and reacted at constant temperature for 2 hours.

[0031] e. The mixture after the hydrolysis reaction in step d is added to the oil-water separator, washed with 5% sodium hydroxide solution, and then allowed to stand for stratification.

[0032] f. the oil layer in the step e is dried using anhydrous calcium chloride, then dropped into a rectifying tower and heated to raise the t...

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 invention relates to a bromobenzene synthesis production process, and relates to the technical field of chemical engineering. According to the invention, first, benzene and iron powder are weighed and are added into a 1000L reaction kettle. The temperature is controlled at 25-35 DEG C, and the mixture is stirred. Bromine is weighed and is dropped into the reaction kettle within 6h. When hydrogen bromide gas is produced, the temperature in the kettle is increased to 70-80 DEG C, and a constant-temperature reaction is carried out for 2h. An obtained material is washed and is allowed to stand for stratification. The obtained material is dried, and a fraction at the temperature of 155-157 DEG C is collected under normal pressure, such that a finished product is obtained. The finished product is packaged and stored. The process provided by the invention has the following advantages: preparation is convenient and simple; the process is environment-friendly and pollution-free; raw materials are easy to obtain; equipment investment is low; product purity is high; operation is convenient; the prepared bromobenzene has good application effect; and the prepared bromobenzene 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 bromobenzene. Background technique [0002] Bromobenzene, bromobenzene, an organic compound, a colorless oily liquid with the smell of benzene. Insoluble in water, soluble in most organic solvents such as methanol, ether, acetone, etc. Bromobenzene can be used as raw material for pressure-sensitive and heat-sensitive dyes; raw material for diphenyl ether series spices; raw material for pesticides, producing insecticide bromofen; raw material for medicines , to produce analgesic antipyretics and cough medicines, used as solvents, automobile fuels, organic synthesis raw materials, pharmaceutical intermediates, etc.; used to synthesize medicines, pesticides, dyes, etc.; Basic raw materials; organic synthesis raw materials. Pharmaceutical intermediates currently have problems such as low yield and low purity in industrial production, ...

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 Applications(China)
IPC IPC(8): C07C17/12C07C25/02
Inventor 刘超金士明赵秀进常好银
Owner 安徽佑骏商品混凝土有限公司
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