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

Process for the continuous preparation of epichlorohydrin

A technology of epichlorohydrin and chloropropene, which is applied in the direction of organic chemistry, can solve the problems of easy decomposition of peroxides when heated, low utilization rate of raw materials, and explosion hazards. Effect

Active Publication Date: 2018-01-09
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in the prior art, peroxides are easily decomposed by heating, resulting in low utilization rate of raw materials and the risk of explosion. A new method for continuously preparing epichlorohydrin is provided.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for the continuous preparation of epichlorohydrin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] use figure 1 As shown in the flow process, 2 reactors are used in series, and the fresh chloropropene with a flow rate of 0.5 kg / h is mixed with the circulating chloropropene of 1.2 kg / h and the homogeneous molybdenum-based catalyst with a flow rate of 3.3 g / h. Enter. The flow rate is 2 kg / h. After the ethylbenzene solution containing 50% ethylbenzene hydroperoxide is mixed with 1 kg / h of circulating ethylbenzene, it is divided into 2 equal parts and enters from the top inlets of reactor 1 and reactor 2 respectively.

[0041] The weight ratio of molybdenum to ethylbenzene hydroperoxide is 0.00005, and allyl chloride: ethylbenzene hydroperoxide=3 (molar ratio).

[0042] The reaction temperature of the reactor 1 is 30° C., the reaction pressure is 0.1 MPa, and the conversion rate of ethylbenzene hydroperoxide is 60%.

[0043] The reaction temperature of the reactor 2 is 50° C., the reaction pressure is 0.1 MPa, and the conversion rate of ethylbenzene hydroperoxide is 10...

Embodiment 2

[0050] use figure 1 As shown in the flow process, 4 reactors are used in series, and the fresh chloropropene with a flow rate of 0.5 kg / h is mixed with the circulating chloropropene of 2 kg / h and the homogeneous molybdenum-based catalyst with a flow rate of 6.7 g / h. Enter. The flow rate is 2 kg / h. After the cumene solution containing 50% cumene hydroperoxide is mixed with 1 kg / h circulating cumene, it is divided into 4 equal parts and enters from the top inlet of reactor 1 to reactor 4 respectively. .

[0051] The weight ratio of molybdenum and cumene hydroperoxide is 0.0001, and allyl chloride: cumene hydroperoxide=5 (mol ratio).

[0052] The reaction temperature of the reactor 1 is 30° C., the reaction pressure is 0.1 MPa, and the conversion rate of cumene hydroperoxide is 30%.

[0053] The reaction temperature of the reactor 2 is 40° C., the reaction pressure is 0.1 MPa, and the conversion rate of cumene hydroperoxide is 60%.

[0054] The reaction temperature of the rea...

Embodiment 3

[0062] use figure 1 As shown in the flow process, 5 reactors are used in series, and the fresh chloropropene with a flow rate of 0.5 kg / h is mixed with the circulating chloropropene of 3 kg / h and the homogeneous molybdenum-based catalyst with a flow rate of 20 g / h. Enter. The flow rate is 2 kg / h. After the ethylbenzene solution containing 50% ethylbenzene hydroperoxide is mixed with 1 kg / h circulating ethylbenzene, it is divided into 5 equal parts and enters from the top inlet of the reactor 1 to the reactor 5 respectively.

[0063] The weight ratio of molybdenum to ethylbenzene hydroperoxide is 0.0003, and allyl chloride: ethylbenzene hydroperoxide=7 (molar ratio).

[0064] The reaction temperature of the reactor 1 is 30° C., the reaction pressure is 0.5 MPa, and the conversion rate of ethylbenzene hydroperoxide is 35%.

[0065] The reaction temperature of the reactor 2 is 50° C., the reaction pressure is 0.5 MPa, and the conversion rate of ethylbenzene hydroperoxide is 55%...

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 continuous preparation of epoxy chloropropane, and is used for mainly solving the problems in the prior art that the utilization rate of raw materials is low and explosion dangers exist because peroxide is easy to decompose when heated. In the presence of a homogeneous molybdenum-based catalyst, epoxy chloropropane is prepared from an organic peroxide and chloropropene. The method includes the following steps: a) a reaction device including n series-connection reaction kettles is provided, wherein n is an integer of more than or equal to 2; b) a material flow A containing fresh chloropropene and a material flow C containing the homogeneous molybdenum-based catalyst are supplied to an inlet of the first reaction kettle; c) a material flow B containing the organic peroxide is divided into n parts for respectively supplying to inlets of the n reaction kettles; and d) a material flow flowing out from an outlet of each the reaction kettle except the last reaction kettle goes into the inlet of the next reaction kettle, and the material flow Vn containing epoxy chloropropane is obtained from an outlet of the last reaction kettle. The method can be used in industrial production of epoxy chloropropane.

Description

technical field [0001] The invention relates to a method for continuously preparing epichlorohydrin. Background technique [0002] Epichlorohydrin is also known as epichlorohydrin, and its chemical name is 3-chloro-l,2-propylene oxide. It is an important organic chemical raw material and synthetic intermediate. Among epoxy compounds, the output of epichlorohydrin is second only to ethylene oxide and propylene oxide, ranking third. Epichlorohydrin can be used as a solvent for cellulose esters, resins and cellulose ethers, and is also used in the production of surfactants, medicines, pesticides, coatings, adhesives, ion exchange resins, plasticizers, glycerin derivatives and glycidol derivatives The raw material of things. Various epoxy resins prepared by epichlorohydrin and bisphenol A have the characteristics of strong adhesion, small shrinkage, chemical corrosion resistance, and good stability, and are widely used as coatings, adhesives, reinforcing materials, and casting...

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 Patents(China)
IPC IPC(8): C07D303/08C07D301/19
Inventor 杨洪云高焕新金国杰黄政丁琳康陈军
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

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