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

Alkali washing method of bio-ethylene

A bio-ethylene and alkaline washing technology, applied in the direction of chemical change purification/separation, organic chemistry, etc., can solve the problems of intensified polymerization of aldehydes, blockage of alkali washing towers, uneven spraying, etc., to reduce the chance of polymerization, gas-liquid The effect of sufficient contact and improved removal efficiency

Active Publication Date: 2014-12-10
CHINA PETROLEUM & CHEM CORP +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the problem of uneven spraying caused by the design problem of the alkali washing tower in the past in the production of bio-ethylene, which makes the local strong alkaline, causes the polymerization of aldehydes to intensify, and the tower blockage of the alkali washing tower problem, provide a new biological ethylene alkali washing 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
  • Alkali washing method of bio-ethylene
  • Alkali washing method of bio-ethylene
  • Alkali washing method of bio-ethylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 , The reactor effluent enters the caustic scrubber from the lower part of the caustic scrubber, and the composition (weight%) of the reactor effluent is: bioethylene 96.69, ethane 0.24, acetaldehyde 0.17, carbon dioxide 0.05, and others 2.85. The flow rate is 4 tons / hour, and the feed temperature is 42°C. The lower part of the caustic washing tower image 3 The internals shown. The lower internal components are composed of packing units with a circular exterior and an equilateral triangle in the internal channel. The number of packing units is 7, D2=0.5D1, d2=0.5d1. The arithmetic average cross-sectional area of ​​the internal channels of all packing units is the cross-sectional area of ​​the tower. 75%; the outer circulating liquid spray in the lower section of the caustic washing tower is 5 layers, the installation is like figure 2 The nozzle shown has three installation angles of 0°, 30°, and 150°. The effluent from the reactor and the circulating l...

Embodiment 2

[0021] The alkaline washing process is the same as in Example 1. The reactor effluent composition (weight %) is: bioethylene 96.69, ethane 0.24, acetaldehyde 0.17, carbon dioxide 0.05, and others 2.85. The flow rate is 4 tons / hour, the feed temperature is 42°C, and the caustic washing tower of the present invention is adopted. The lower internal components are composed of packing units with a circular exterior and a regular pentagonal channel. The number of packing units is 4, D2= 0.75D1, d2=0.75d1, the arithmetic average cross-sectional area of ​​the internal channels of all packing units is 45% of the cross-sectional area of ​​the tower, the lower section of the external circulation liquid sprays in 3 layers, and the nozzle installation angles are 0°, 120°, and 180° ; The upper section is packing. The carbon dioxide removal rate of the caustic scrubber is 99.0%, and the carbon dioxide removal rate of the industrial plant is 94.6%.

Embodiment 3

[0023] The alkaline washing process is the same as in Example 1. The reactor effluent composition (weight %) is: bioethylene 96.69, ethane 0.24, acetaldehyde 0.17, carbon dioxide 0.05, and others 2.85. The flow rate is 4 tons / hour, and the feed temperature is 42°C. The caustic washing tower of the present invention is adopted. The lower section of the external circulating liquid sprays in two layers. The nozzle installation angles are 30° and 150°. The inner parts of the lower section are round from the outside. The internal channel is also composed of circular packing units, the number of packing units is 6, D2=D1, d2=d1, the arithmetic average cross-sectional area of ​​the internal channels of all packing units is 25% of the tower cross-sectional area; the upper section is the packing. The carbon dioxide removal rate of the caustic scrubber is 99.6%, and the carbon dioxide removal rate of the industrial plant is 95.2%.

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 alkali washing method of bio-ethylene, and mainly solves the problems of nonuniform spraying, partial strong basicity, aggravated aldehyde polymerization and alkali washing tower blocking due to the alkali washing tower design of production equipment in previous technologies. According to the method, the mode of multilayer spraying of sodium hydroxide at the lower section of an alkali washing tower is employed for acid gas washing, with the weight concentration of external circulation alkali lye controlled at 1-15%, and a reasonable internal component is added at the lower section of the alkali washing tower, also gas-liquid distribution inside the tower is optimized. The technical method of the invention well solves the above problems, and can be used in industrial production devices of bio-ethylene.

Description

Technical field [0001] The invention relates to a method for alkaline washing of biological ethylene. Background technique [0002] Ethylene is a very important petrochemical raw material, and its bulk downstream products mainly include polyethylene, ethylene oxide, ethylene glycol, polyvinyl chloride, styrene, vinyl acetate, etc. [0003] The dehydration of ethanol to ethylene used to be the main method of ethylene industrial production. Since the middle of the last century, due to the rapid development of the petrochemical industry, the cost of producing ethylene from naphtha has been greatly reduced, and the process route of ethanol dehydration to ethylene has basically been replaced by a petroleum-based thermal cracking process route. In recent years, with the sharp increase in oil prices and the reduction in the cost of biomass ethanol, the competitiveness of the ethanol-to-ethylene process has increased significantly, which has attracted people's attention again. [0004] In ...

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 Patents(China)
IPC IPC(8): C07C11/04C07C7/148
Inventor 刘军沈伟朱瑛
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