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

Method for preparing epoxy chloropropane

A technology of epichlorohydrin and chloropropene, which is applied in the direction of organic chemistry, can solve the problem of catalyst activity reduction, achieve the effects of no activity reduction, easy recovery and recycling, and reduce production costs

Active Publication Date: 2012-05-16
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF2 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problem of catalyst activity reduction in the above-mentioned epoxy system, and provide a new process for preparing epichlorohydrin from propylene chloride

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

[0024] 200g purity is 98% allyl chloride (ALC), 12g catalyst [(C 16 h 33 )N(CH 3 ) 3 ] 3 PW 4 o 16 and 2g additive [(C 16 h 33 )N(CH 3 ) 3 ] 3 PO 4 Put it into a 500mL glass reactor, raise the temperature to 65°C, and slowly pump in 68g of 50% H 2 o 2After the addition, continue to react at this temperature for 3 hours, cool with ice water, separate the liquid and solid, use the solid catalyst for the next reaction, separate the oil phase from the liquid, and perform gas chromatography analysis to obtain the yield and selectivity of epichlorohydrin . The step of reclaiming catalyst and reacting is the same as above, carries out altogether 10 times of reaction results and is shown in Table 1.

[0025] Table 1

[0026] Responses

[0027] Visible by table 1, additive [(C 16 h 33 )N(CH 3 ) 3 ] 3 PO 4 Adding can improve the stability of catalyst, and the yield of epichlorohydrin is maintained at about 87% when catalyst is recycled 9 times (10 times of...

Embodiment 2

[0029] 200g purity is 98% allyl chloride (ALC), 8g catalyst [(C 12 h 25 )N(CH 3 ) 3 ] 3 PW 4 o 16 and 1g additive [(C 12 h 25 )N(CH 3 ) 3 ] 3 PO 4 Put it into a 500mL glass reactor, raise the temperature to 55°C, and slowly pump in 70g of 30% H 2 o 2 After the addition, continue to react at this temperature for 3 hours, cool with ice water, separate the liquid and solid, use the solid catalyst for the next reaction, separate the oil phase from the liquid, and perform gas chromatography analysis to obtain the yield and selectivity of epichlorohydrin . The step of reclaiming catalyst and carrying out reaction is the same as above, carries out altogether 8 times of reaction results and is shown in Table 2.

[0030] Table 2

[0031] Responses

[0032] It can be seen from Table 2 that the yield and the selectivity of epichlorohydrin are maintained at about 84% and 94% when the catalyst is recycled 7 times (reacted 8 times), without decreasing, and the stabi...

Embodiment 3

[0034] 300g purity is 98% allyl chloride (ALC), 10g catalyst [(C 18 h 37 )N(CH 3 ) 3 ] 3 PW 4 o 16 and 0.5g additive [(C 18 h 37 )N(CH 3 ) 3 ] 3 PO 4 Put it into a 500mL glass reactor, raise the temperature to 48°C, and slowly pump in 50g of 50% H 2 o 2 After the addition, continue to react at this temperature for 4h, cool with ice water, separate the liquid and solid, use the solid catalyst for the next reaction, separate the oil phase from the liquid, and perform gas chromatography analysis to obtain the yield and selectivity of epichlorohydrin . The step of reclaiming catalyst and carrying out reaction is the same as above, carries out altogether 15 times of reaction results and is shown in Table 3.

[0035] table 3

[0036] Responses

[0037] 10

[0038] It can be seen from Table 3 that the yield and selectivity of epichlorohydrin for 14 times of catalyst recycling (reaction 15 times) are maintained at about 83% and 94%, indicating that...

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 discloses a method for preparing epoxy chloropropane. The method comprises the following step of: oxidizing chloropropene by using a phosphotungstic acid quaternary ammonium salt, a phosphoric acid quaternary ammonium salt and hydrogen peroxide under a solvent-free condition to generate the epoxy chloropropane.

Description

technical field [0001] The invention relates to the preparation of epichlorohydrin, in particular to a method for preparing epichlorohydrin by epoxidation of propylene chloride. Background technique [0002] Epichlorohydrin (ECH) is an important organic chemical raw material and intermediate, widely used in the production of epoxy resin and epichlorohydrin rubber. There are two processing routes for epichlorohydrin: chlorohydrin method and allyl acetate method. In the chlorohydrin method, propylene is chlorinated at high temperature to generate Allyl Chloride, which then reacts with aqueous chlorine solution to generate 1,3-dichloro-2-propanol, which is cyclized under the action of alkali solution to generate epichlorohydrin. One equivalent of epichlorohydrin is produced with one equivalent of CaCl 2 Into the water phase, this process is very serious to environmental pollution. The allyl acetate method is to first oxidize propylene in acetic acid to form allyl acetate, th...

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): C07D303/08C07D301/12
Inventor 高爽李军赵公大张毅吕迎张恒耘
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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