Utilization method of waste gas discharged from butadiene extracting apparatus

An extraction device and butadiene technology, which is applied in the field of utilization of alkyne-rich waste gas from a butadiene extraction device, can solve the problems of difficult utilization of butadiene tail gas, achieve equipment investment savings, strong raw material adaptability, The effect of less investment

Active Publication Date: 2012-02-01
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems existing in the prior art that butadiene tail gas is difficult to liquefy and increase pressure, the present invent

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
  • Utilization method of waste gas discharged from butadiene extracting apparatus
  • Utilization method of waste gas discharged from butadiene extracting apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. Boost: Exhaust gas 1 from the butadiene extraction unit (main composition: 7.82% butene, 43.76% butadiene, 47.1% ethyl acetylene and vinyl acetylene, both in mass percentage), flow rate 1080kg / h, pressure 0.1MPa (absolute pressure, the same below). The exhaust gas enters a section of the compressor 11, the pressure of the exhaust gas stream 2 at the outlet of the compressor is 0.17MPa, and the temperature is 64.3°C. The exhaust gas enters the cold box for heat exchange and turns into a liquid phase. 5.1°C;

[0041] 2. Reaction: The liquid phase C43 enters the mixing tank after being dehydrated, and mixes with the recycle stream 7 from the hydrogenation product. The flow rate of the recycle stream is 8640kg / h. After boosting the pressure by the booster pump, a certain amount of hydrogen is added 5. Enter the reactor 13 to react. The reaction conditions are: temperature 40°C, pressure 2.0MPa, hydrogen / alkyne molar ratio 1.5, liquid volume space velocity 15h -1, a c...

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 utilization method of waste gas discharged from a butadiene extracting apparatus. According to the method, waste gas is subject to a reaction with hydrogen; alkyne in the waste gas is subject to a selective hydrogenation reaction, such that diolefins is produced; the reaction product is delivered back to the butadiene extracting apparatus, and 1,3-butadiene can be recovered. According to the invention, a compressor technology and a cold box technology are adopted, such that a problem of butadiene tail gas utilization difficulty is solved.

Description

technical field [0001] The invention relates to the field of recovery and utilization of petrochemical waste gas, in particular to a method for utilizing waste gas rich in alkynes of a butadiene extraction device. Background technique [0002] When the ethylene cracking unit co-produces C4 hydrocarbons, the 1,3-butadiene in the cracked C4 hydrocarbons is usually refined by two-stage solvent extraction rectification and then direct rectification. The residual waste gas produced by this refining device is commonly known as Butadiene exhaust. Extractive distillation is also called extraction, and the recovery device of butadiene is generally called butadiene extraction device. The alkyne concentration in the butadiene tail gas is relatively high, generally greater than 20% by weight, and the highest can exceed 40% by weight. These alkyne-rich waste gases have no industrial value at present and can only be sent to torch for combustion. Because high-concentration alkynes are e...

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): C07C11/167C07C5/09C07C7/10F25J1/00
Inventor 李东风张勇戴伟程建民廖丽华刘智信过良李琰李晓峰罗淑娟
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