Check patentability & draft patents in minutes with Patsnap Eureka AI!

Olefin epoxidation method

A technology of epoxidation and olefins, applied in chemical instruments and methods, organic chemistry, chemical/physical processes, etc., can solve problems such as difficult separation of catalysts and products, cumbersome process flow, and unfavorable industrial production. Achieve the effects of reducing side reactions, improving reaction efficiency, and relieving thermal effects

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
View PDF2 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] CN1256274A has proposed the technology that titanium-silicon molecular sieve catalyzes propylene, hydrogen peroxide epoxidation to continuously produce propylene oxide, in this process, catalyzer exists with slurry state, although obtained better raw material conversion rate and product yield, but because catalyzer It is in a slurry state and needs to be separated from the product after the reaction for reuse
This leads to a cumbersome process flow, which is not conducive to large-scale industrial production. In addition, in the process, the catalyst will also have unavoidable loss.
The TS-1 of CN1639143A catalyzes the epoxidation of propylene and hydrogen peroxide, and adopts the reaction mode of autoclave, which still does not solve the problem of difficult separation of catalyst and product

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
  • Olefin epoxidation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In the polymerization kettle, add 7.5g of titanium silicon molecular sieve powder, 90g of polymerized monomer styrene and 30g of divinylbenzene, 60g of pore-forming agent liquid wax, stir and mix well, and when the water bath is heated to 60℃, add the initiator peroxidation 1.5 g of benzoyl and a polymerization temperature of 90° C. for 6 hours to obtain a massive titanium silicate molecular sieve catalyst. Then it is crushed and granulated. After sieving, a catalyst with a suitable particle size is selected, 250 ml of 1,2-dichloroethane is added for swelling, and the swelling is carried out at room temperature for 5 hours. After pouring out 1,2-dichloroethane, add 200ml ethyl acetate for solvent extraction. The extraction reaction temperature is 55°C and the extraction time is 4 hours. The same method is used for three extractions to obtain titanium silicon molecular sieve and resin composite Catalyst A, its physical and chemical properties are shown in Table 1.

Embodiment 2

[0039] In the polymerization kettle, add 15g of titanium silica molecular sieve powder, 90g of polymerized monomer styrene, 15g of divinyl toluene, 25g of divinyl xylene, and pore former C 5 After stirring and mixing 60 g of fatty alcohol uniformly, when the water bath is heated to 80° C., 2.0 g of the initiator azobisisobutanol is added, and the polymerization temperature is 100° C. for 6 hours to obtain a massive titanium silicon molecular sieve catalyst. Then it is crushed and granulated. After sieving, a catalyst with a suitable particle size is selected, 250 ml of 1,2-dichloroethane is added for swelling, and the swelling is carried out at room temperature for 5 hours. After pouring out 1,2-dichloroethane, add 200ml of xylene for solvent extraction. The extraction reaction temperature is 55°C, the extraction time is 4 hours, and the same method is used for three extractions to obtain a titanium silicon molecular sieve and resin composite catalyst. B. See Table 1 for its phy...

Embodiment 3

[0041] The weight of the titanium-silicon molecular sieve powder in Example 1 was changed to 30 g, the extraction solvent was changed to chloroform, and the rest was the same as in Example 1, to obtain a titanium-silicon molecular sieve and resin composite catalyst C. The physical and chemical properties are shown in Table 1.

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

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses an olefin epoxidation method. The olefin epoxidation method comprises the step of performing epoxidation on the olefin and hydrogen peroxide in the presence of a catalyst, wherein alcohol serves as a solvent; and the catalyst is a titanium silicon molecular sieve and resin composite catalyst. In the olefin epoxidation method, a fixed bed reaction mode is adopted, so the problem that the titanium silicon catalyst powder and the reaction solution are difficult to separate in a slurry reactor in the past is solved, and reaction efficiency is improved.

Description

Technical field [0001] The invention belongs to a method for epoxidation of olefins, in particular to a method for epoxidation of olefins in a fixed bed. Background technique [0002] Since Enichem of Italy first synthesized the lattice oxygen-selective titanium oxide silica molecular sieve catalyst TS-1 in 1983, it has become a hot spot in oxidation catalyst research due to its excellent oxidation selectivity and mild reaction conditions. This discovery is regarded as environmentally friendly A breakthrough in catalyst development. [0003] Titanium-silicon molecular sieve catalyst has a very important role in the selective oxidation of organic compounds. For example, propylene is epoxidized with hydrogen peroxide under the action of titanium-silicon molecular sieve catalyst to prepare propylene oxide. In industrial applications, titanium-silica molecular sieve catalysts show excellent type-selective catalytic performance. Generally, the smaller the particle size, the higher the ...

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): C07D301/12C07D303/04B01J31/38
Inventor 孙万付王海波勾连科黎元生宋丽芝艾抚宾
Owner CHINA PETROLEUM & CHEM CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com