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

Epoxypropane purifying method

A technology of propylene oxide and purification method, applied in the direction of organic chemistry and the like, can solve the problems of low yield of propylene oxide and large loss of extractant, and achieve the effect of high extraction efficiency and good technical effect.

Active Publication Date: 2014-10-22
CHINA PETROLEUM & CHEM CORP +1
View PDF9 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that propylene oxide and extractant are entrained in the overhead stream of the extractive distillation tower in the prior art, resulting in low yield of propylene oxide and large loss of extractant. A new epoxy Propane purification method

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
  • Epoxypropane purifying method
  • Epoxypropane purifying method
  • Epoxypropane purifying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The crude propylene oxide solution (stream 1) exchanges heat with the liquid in the solvent recovery tower (stream 5) to 80°C and enters the extractive distillation tower T-101. The extractive distillation tower uses n-octane as the extraction agent, and the solvent ratio of the extractive distillation tower (extraction The flow rate ratio of agent stream 6 to crude propylene oxide solution feed 1) is 4, deionized water (stream 12) is sprayed into the gas phase at the top of the tower, and oil-water separation operation is carried out in the tower top phase separator D-101 after condensation. There are multi-layer partitions in the phase vessel, and the separated oil layer (stream 8) is mixed with the recovered extractant (stream 6) as the reflux of the extractive distillation tower (stream 13), and the separated water layer (stream 9) enters the water washing tower T -103, the number of theoretical plates of the T101 column is 70, the operating pressure is controlled at...

Embodiment 2

[0060] The crude propylene oxide solution (stream 1) exchanges heat with the liquid in the solvent recovery tower (stream 3) to 70°C and enters the extractive distillation tower T-101. The extractive distillation tower uses n-heptane as the extraction agent, and the solvent ratio of the extractive distillation tower (extraction The flow rate ratio of agent stream 6 to crude propylene oxide solution feed 1) is 5:1, medium-pressure steam (stream 12) is injected into the gas phase at the top of the tower, and the oil-water separation operation is carried out in the top phase separator D-101 after condensation , there are multi-layer partitions in the phase separator, the separated oil layer (stream 8) is mixed with the recovered extractant (stream 6) as the reflux of the extractive distillation column (stream 13), and the separated water layer (stream 9) enters the water wash The theoretical plate number of tower T-103 and T101 is 75, the operating pressure is controlled at 200kPa...

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 an epoxypropane purifying method. The problems of low epoxypropane yield and large extractant loss due to the entrainment of epoxypropane and an extractant in the material flow from the top of an extraction distillation tower in the prior art are mainly solved. The method comprises the following steps: 1, a crude epoxypropane solution enters the extraction distillation tower to obtain a material flow 2 at the tower top and a material flow 3 at the tower bottom; 2, the material flow 3 enters a solvent recovery tower to obtain an epoxypropane product at the tower top and an extractant flow 5 at the tower bottom, and the flow 5 is divided into a flow 6 and a flow 7; 3, the material flow 2 is condensed, and the condensed flow 2 enters a phase splitter and undergoes oil and water separation to obtain an oil layer 8 and a water layer 9; 4, the oil layer 8 and the flow 6 return to the top of the extraction distillation tower; and 5, the flow 7 enters the lower portion of a water washing tower and the water layer 9 enters the upper portion of the water washing tower to obtain wastewater flow at the tower bottom and a flow 11 at the tower top, and the flow 11 enters the phase splitter. The method well solves the problems and can be used in the industrial production of epoxypropane purification.

Description

technical field [0001] The present invention relates to a kind of propylene oxide purification method, more specifically, the present invention mainly relates to the propylene oxide purification method that contains water, acetaldehyde, methyl alcohol and methyl formate as impurity. Background technique [0002] Propylene oxide is an important organic compound raw material and the third largest propylene derivative after polypropylene and acrylonitrile. Cumene hydroperoxide (CHP) and ethylbenzene hydroperoxide (EBHP) react with propylene to obtain propylene oxide in the presence of an epoxidation catalyst. In addition to propylene oxide, the target product also generates water , methanol, acetaldehyde, methyl formate and other oxygen-containing compounds. In order to obtain high-purity propylene oxide that meets the requirements of polymerization, the impurities contained in propylene oxide must be separated and removed. Because the relative volatility of methyl formate 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
IPC IPC(8): C07D303/04C07D301/32
CPCC07D301/32C07D303/04
Inventor 杨卫胜胡松李木金
Owner CHINA PETROLEUM & CHEM CORP
Features
  • Generate Ideas
  • 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