Propylene recovery method and equipment, epoxidation reaction product separation method and device, epoxidation method and epoxidation system

A technology of epoxidation reaction and propylene, which is applied in epoxidation reaction product separation device, epoxidation reaction product separation, epoxidation system, and epoxidation field, can solve the problems of high energy consumption and poor economy, and achieve Low recovery energy consumption, lower propane content, good economical effect

Pending Publication Date: 2022-01-25
CHINA PETROLEUM & CHEM CORP +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] This method absorbs the propylene / propane mixture separated from the waste gas stream, and then separates the obtained propylene / propane mixture to obtain propylene and propane respectively, which has the problems of high energy consumption and poor economic efficiency.

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
  • Propylene recovery method and equipment, epoxidation reaction product separation method and device, epoxidation method and epoxidation system
  • Propylene recovery method and equipment, epoxidation reaction product separation method and device, epoxidation method and epoxidation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132] This embodiment adopts figure 1 The separation scheme shown treats an epoxidation reaction product H0 having the following composition: based on the total amount of epoxidation reaction product H0, the epoxidation reaction product H0 contains: 14% by weight propylene oxide, 7.2% by weight % propylene, 0.6% by weight propane, 63.5% by weight methanol, 0.2% by weight hydrogen peroxide, 13.4% by weight water.

[0133] (1) The epoxidation reaction product H0 enters the de-epoxypropane tower 1 for distillation, and the distillate H1 containing propylene oxide and unreacted propylene and the bottom stream H2 containing methanol are obtained from the top of the tower. The temperature at the top of the epoxide removal tower 1 is 69° C., the pressure at the top of the tower is 0.1 MPag, and there is no reflux. The theoretical plate number of the epoxide removal tower 1 is 35, and the feed is fed from the top of the tower.

[0134] The content of propylene oxide is 0.005% by wei...

Embodiment 2

[0172] The epoxidation reaction product H0 is separated by the same method as in Example 1 to obtain reclaimed propylene. The difference is that in step (4), the compression ratio of the compressor 6 is 11.8, and the pressure in the buffer tank 8 is kept at 1.3 MPag at 40°C. The content of propane in the liquid phase separation stream H5 was 43% by weight, based on the total amount of propane in the propylene-containing process stream H3.

[0173] Based on the total amount of the second liquid phase separation stream L2 and the propylene refining stream L3, the content of methanol is 5.5% by weight, the content of propylene is 92.4% by weight, the content of propane is 1.9% by weight, and the content of oxygen is 0.1% by weight , the nitrogen content was 0.1% by weight. The content of propane in the propylene absorbing stream L5 was 1.4% by weight.

[0174] Based on the total amount of propylene in the epoxidation reaction product H0, the total recovery of propylene was 99.7...

Embodiment 3

[0177] Adopt the method identical with embodiment 1 to separate epoxidation reaction product H0, obtain reclaiming propylene, difference is, in step (5), the operating condition of propylene refining tower 4 is:

[0178] The temperature at the top of the propylene refining tower 4 was 42° C., the pressure at the top of the tower was 1.7 MPag, and the reflux ratio was 5. The theoretical plate number of the propylene refining column 4 is 100, and the theoretical plate number of the feeding position of the first liquid-phase separated stream L1 is 55.

[0179] The content of propane in the refined propylene stream L3 is 4.4% by weight, based on the total amount of propylene in the first liquid phase separation stream L1, the content of propylene entering the propane stream L4 is 4.5% by weight.

[0180] The second liquid phase separation stream L2, the propylene refining stream L3 and the propylene absorption stream L5 are used as recovered propylene.

[0181] Based on the total...

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 discloses a propylene recovery method and equipment, an epoxidation reaction product separation method and device, an epoxidation method and an epoxidation system.The recovery method comprises the following steps: condensing processing gas flow containing propylene and propane to obtain a liquid phase separation material flow and a gas phase separation material flow, dividing the liquid-phase separation material flow into a first liquid-phase separation material flow and a second liquid-phase separation material flow, and separating the first liquid-phase separation material flow to obtain a propylene refined material flow with reduced propane content and a propane material flow with reduced propylene content; and enabling the gas phase separation stream to make contact with an absorbent to obtain an eluted gas stream containing oxygen and an absorbed stream containing the absorbent and propylene. According to the propylene recovery method disclosed by the invention, balance can be achieved between efficiency and energy consumption, the content of propane in circulating propylene can be effectively reduced, the content of propane in an epoxidation reaction system is stably controlled within a specified range for a long time, and the energy consumption of propylene recovery is low.

Description

technical field [0001] The present invention relates to a method for recovering propylene in a processed gas stream containing propylene and a propylene recovery device. The present invention also relates to a method for separating epoxidation reaction products and a device for separating epoxidation reaction products. The present invention further relates to An epoxidation method and an epoxidation system. Background technique [0002] Propylene oxide (PO) is the third largest raw material of propylene-derived organic compounds after polypropylene and acrylonitrile, and 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. [0003] Propylene oxide production processes mainly include chlorohy...

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): C07C7/00C07C7/11C07C7/04C07C11/06C07D301/12C07D301/32C07D303/04
CPCC07C7/005C07C7/11C07C7/04C07D301/12C07D301/32C07D303/04C07C11/06Y02P20/52
Inventor 李红波王皓张得江王瑾丁晖殿林民罗一斌朱斌
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