Method for refining and purifying propylene oxide

A technology of propylene oxide and propane, which is applied in the field of refining propylene oxide, can solve the problems of long process and high energy consumption, and achieve the effects of increasing yield, reducing losses, and reducing operating costs

Active Publication Date: 2013-06-26
CHINA PETROLEUM & CHEM CORP +1
View PDF16 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The propylene oxide product through this refining process still contains trace impurities such as acetaldehyde, methyl formate and acetone, and need

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 refining and purifying propylene oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The present invention provides the refining method of propylene oxide in direct epoxidation reaction product, and direct epoxidation reaction and separation method are specifically implemented like this:

[0020] A method for refining and purifying propylene oxide, comprising:

[0021] The reaction product from the epoxidation reactor enters the propylene separation tower for separation, and the obtained tower top material contains propylene, with or without propane, propylene oxide, methanol, a small amount of aldehyde and ketone impurities, with or without water, and the tower bottom material contains methanol , water, hydrogen peroxide and high-boiling point by-products; the top material of the propylene separation tower enters the propylene stripper, and the top gas contains propylene, with or without propane, and a small amount of propylene oxide, which is recycled to the reaction system after being compressed; The bottom material of the propylene stripper contains...

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 provides a method for refining and purifying propylene oxide. The method is characterized by comprising the steps that an epoxidation reaction product enters a propylene separating column to be separated into column top materials and column bottom materials, wherein the column top materials contain propylene, propylene oxide and methanol and contain or do not contain propane and water, and the column bottom materials contain methanol, water, hydrogen peroxide and high-boiling-point byproducts; column top materials from the propylene separating column enter a propylene stripping column, and the column top gases contain propylene and little propylene oxide and contain or do not contain propane and circulate to a reaction system after compression; and column bottom materials contain methanol, propylene oxide and few aldehyde ketone impurities and contain or do not contain water, enter a reactor filled with alkaline ion exchange resins to react to remove methyl formate and aldehyde out of the column bottom materials and are further refined through rectification to obtain the high-purity propylene oxide product. The invention also provides a separation method for preparing propylene oxide and the product through direct epoxidation. The method provided by the invention has the beneficial effects that the low temperature and low pressure process is adopted, thus increasing the yield of propylene oxide, reducing the losses of propylene oxide and reducing the operating costs of the devices.

Description

technical field [0001] The present invention relates to a kind of refining method of propylene oxide, more specifically, relate to a kind of method of refining propylene oxide in the reaction product of preparing propylene oxide by reacting hydrogen peroxide and propylene. Background technique [0002] Propylene oxide (Propylene Oxide) is an important raw material for organic synthesis, and is the third largest propylene derivative besides polypropylene and acrylonitrile. It is mainly used in the production of polyether, propylene glycol, propylene glycol ether, etc. It is also an important raw material for non-ionic surfactants, oil field demulsifiers, and pesticide emulsifiers. Propylene oxide derivatives are also widely used in industries such as food, tobacco, pesticides and cosmetics. Nearly 100 kinds of downstream products have been produced, which are important raw materials for fine chemical products. [0003] Propylene oxide production processes mainly include chl...

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): C07D303/04C07D301/32C07D301/12
CPCY02P20/52
Inventor 郭湘波王瑾李华慕旭宏林民舒兴田王伟何驰剑
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap