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

Method for producing epoxy chloropropane

A technology of epichlorohydrin and chloropropene, applied in the direction of organic chemistry, which can solve the problems of explosion hazard and lower reaction conversion rate

Inactive Publication Date: 2011-03-30
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the action of the catalyst, a part of hydrogen peroxide decomposes ineffectively during the reaction, which not only reduces the conversion rate of the reaction, but also easily causes the gas phase of the reactor to form a mixed gas with explosion hazard.

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

[0014] Add 3-chloropropene and catalyst to the reactor first, stir and heat up to the bubble point temperature, after about 44°C, then add hydrogen peroxide at a uniform speed for reaction, the feeding time is 0.5h, the total reaction time is 1h, the reaction heat in the reaction process is passed through the organic steam The condensate is carried away by reflux. Feed mass ratio, chloropropene: 50% hydrogen peroxide: catalyst is 1: 0.3: 0.11.

[0015] During the reaction process, the highest gas phase oxygen concentration is 4.4%, the conversion rate of allyl chloride is 41.6%, and the invalid decomposition rate of hydrogen peroxide is 1.4%.

Embodiment 2

[0017] Add 3-chloropropene and catalyst to the reactor first, stir and heat up to the bubble point temperature, after about 46°C, then add hydrogen peroxide at a uniform speed for reaction, the feeding time is 1h, the total reaction time is 1.5h, the reaction heat in the reaction process is passed through the organic steam The condensate is carried away by reflux. Feed mass ratio, chloropropene: 50% hydrogen peroxide: catalyst is 1: 0.3: 0.11.

[0018] During the reaction process, the highest gas phase oxygen concentration is 1.9%, the conversion rate of allyl chloride is 41.4%, and the invalid decomposition rate of hydrogen peroxide is 1.8%.

Embodiment 3

[0020] Add 3-chloropropene, catalyst and hydrogen peroxide together into the reactor at room temperature, stir and heat up to the bubble point temperature, about 44°C-46°C, and the reaction time is 1h. Feed mass ratio, chloropropene: 50% hydrogen peroxide: catalyst is 1: 0.3: 0.11.

[0021] During the reaction process, the highest gas phase oxygen concentration is 22.8%, the conversion rate of allyl chloride is 40.6%, and the invalid decomposition rate of hydrogen peroxide is 3.8%.

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 method for producing epoxy chloropropane by a phase transfer method, which comprises the following steps of: adding 3-chloropropene serving as a raw material and a catalyst into a reactor, stirring, heating to the bubble point temperature of between 44 and 46 DEG C, adding hydrogen peroxide serving as an oxidant, and reacting at the bubble point temperature, wherein reaction heat in the reaction process is taken away through organic steam condensation and reflow; the catalyst is quaternary ammonium phosphotungstate; the reaction time is 1 hour; and the mass ratio of the 3-chloropropene to 50 percent hydrogen peroxide to the catalyst is 1:0.3:0.11. Other solvents are not added in the reaction; the hydrogen peroxide is added at the temperature of between 44 and 46 DEG C, so that the epoxidation reaction is further promoted, and the conversion rate of the epoxidation reaction is improved; meanwhile, the increase of organic steam partial pressure is facilitated, gaseous oxygen is diluted, and the blasting danger of a gaseous phase of the reactor is effectively reduced.

Description

technical field [0001] The invention relates to a production method of epichlorohydrin, in particular to a method for producing epichlorohydrin by a phase transfer method. Background technique [0002] Epichlorohydrin is an important organic chemical raw material and fine chemical product with a wide range of uses. The traditional epichlorohydrin production process is mainly propylene high-temperature chlorination method and propylene acetate method, and there is a large amount of "three wastes" pollution control problems in the process of saponification sewage discharge. With the advancement of the sustainable development strategy, the green synthesis route of epichlorohydrin with industrial value has become the focus of research in the industry. The current research mainly focuses on the exploration of the direct epoxidation process route of allyl chloride, using titanium silicon molecular sieve or phosphorus Tungstate is used as a catalyst, and hydrogen peroxide is used ...

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
IPC IPC(8): C07D303/08C07D301/12
Inventor 姜杰谢传欣石宁张宏哲张晨徐伟孟庭宇王慧欣孙峰黄飞张铁王振刚郑俊鹤
Owner CHINA PETROLEUM & CHEM CORP
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