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

Method for producing epoxypropane from cumene hydroperoxide and propylene

A technology of cumene hydroperoxide and propylene oxide, which is applied in the field of propylene oxide production from cumene hydroperoxide and propylene, can solve the problems of reaction temperature rise and achieve the effect of improving selectivity

Inactive Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
View PDF13 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that in the prior art, the reaction process of cumene hydroperoxide and propylene epoxidation to propylene oxide has a higher reaction temperature rise and requires higher propylene oxide to maintain a higher reaction efficiency. The problem of the molar ratio of cumene hydroperoxide and cumene hydroperoxide provides a new method for producing propylene oxide from cumene hydroperoxide and propylene

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
  • Method for producing epoxypropane from cumene hydroperoxide and propylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] according to figure 1 In the technical scheme shown, the raw material contains a mixture of cumene hydroperoxide with a concentration of 35% wt, and the flow rate is 101166.1 kg / h. It is divided into two shares in proportion and enters a two-stage adiabatic fixed-bed reactor respectively. The raw material propylene is 10812.7 kg / hour, circulating propylene 92993.1 kg / hour, mixed with the cumene hydroperoxide mixture entering the first catalyst bed, and under the conditions of reaction temperature 55°C and reaction pressure 3.1MPaG, with Ti / SiO 2 Catalyst contact, liquid phase epoxidation reaction to generate propylene oxide, dimethyl benzyl alcohol and other by-products; the reactants flowing out of the first catalyst bed and the mixture of cumene hydroperoxide entering the second catalyst bed, circulation The streams are mixed, the temperature is controlled at 62°C, and they enter the second catalyst bed, and Ti / SiO 2 Catalyst contact, liquid phase epoxidation reacti...

Embodiment 2

[0040] Same as [Example 1], only the flow rate of circulating propylene and the inlet temperature of the second catalyst bed are changed: the flow rate of circulating propylene is 61995.4 kg / h, the temperature of the second catalyst bed inlet is 66°C, and the others are the same as in [Example 1]. Cumene hydroperoxide weight space velocity 4.5hr -1 , the mol ratio of total propylene and cumene hydroperoxide is 7.1, and the mol ratio of propylene and cumene hydroperoxide at the inlet of the first catalyst bed and the second catalyst bed then reaches 17.0 and 16.9, the first catalyst bed The outlet temperatures of the bed and the second catalyst bed were 87.2°C and 87.2°C respectively, the total conversion rate of cumene hydroperoxide was 99.3%, and the molar selectivity to propylene oxide was 96.0%.

[0041]

Embodiment 3

[0043] Same as [Example 1], only the reactor form is changed: two single-bed adiabatic fixed-bed reactors are connected in series, and the others are the same as [Example 1]. Cumene hydroperoxide weight space velocity 4.5hr -1 , the mol ratio of total propylene and cumene hydroperoxide is 10.2, and the mol ratio of propylene and cumene hydroperoxide at the inlet of the first catalyst bed and the second catalyst bed then reaches 24.2 and 24.1, the first catalyst The outlet temperatures of the bed and the second catalyst bed were 82.6°C and 82.3°C respectively, the total conversion rate of cumene hydroperoxide was 99.3%, and the molar selectivity to propylene oxide was 96.3%.

[0044]

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 epoxypropane from cumene hydroperoxide and propylene, which mainly solves the problems of higher reaction temperature rise and higher propylene / cumene hydroperoxide mole ratio required for keeping higher reaction efficiency in the prior art. The method comprises the following steps: raw materials cumene hydroperoxide and propylene liquid phase enter a multisection adiabatic reaction region composed of at least two sections, and the raw materials contact a Ti-silicon dioxide catalyst to perform epoxidation reaction at 15-160 DEG C under the pressure of 1.0-12.0 MPa under the condition that the total mole ratio of the propylene to the cumene hydroperoxide is 2-30, thereby generating the epoxypropane, wherein the raw material cumene hydroperoxide sectionally enters various catalyst bed layers of the multisection adiabatic reaction region, and the epoxypropane-containing epoxidation product is partially circulated to the catalyst bed layer inlets of the 2nd-nth sections of the multisection adiabatic reaction region. The technical scheme well solves the problems, and can be used in industrial production of epoxypropane by cumene hydroperoxide and propylene epoxidation.

Description

technical field [0001] The invention relates to a method for producing propylene oxide from cumene hydroperoxide and propylene. Background technique [0002] Propylene oxide is an important basic chemical raw material and the third largest propylene derivative after polypropylene and acrylonitrile. It is mainly used in the production of polyether and propylene glycol. It is also the main raw material of the fourth-generation detergent non-ionic surfactant, oil field demulsifier, pesticide emulsifier, etc. Propylene oxide derivatives are widely used in industries such as automobiles, construction, food, tobacco, medicine and cosmetics. Nearly 100 kinds of downstream products have been produced, which are important raw materials for fine chemical products. [0003] The traditional production process of propylene oxide is the chlorohydrin process, which includes three steps: chloroalcoholization of propylene and hypochlorous acid solution, saponification of chloropropanol an...

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): C07D303/04C07D301/19
CPCC07D303/04C07D301/19
Inventor 邵百祥
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