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2-ethyl hexanol tail gas recovery system and method

A tail gas recovery and tail gas technology, applied in the direction of organic chemical methods, chemical instruments and methods, purification/separation/stabilization of organic compounds, etc., can solve the problems of large investment and energy consumption, large investment, etc., to reduce energy consumption consumption, reduce equipment cost, and avoid the effect of too low temperature at the top of the tower

Active Publication Date: 2015-05-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Butyraldehyde shows certain corrosiveness in actual operation, the absorption and desorption tower should be made of stainless steel, and the investment is relatively large
In addition, if the absorption method is required to achieve a high tail gas recovery rate (for example, more than 90%), the investment and energy consumption will increase greatly

Method used

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  • 2-ethyl hexanol tail gas recovery system and method
  • 2-ethyl hexanol tail gas recovery system and method
  • 2-ethyl hexanol tail gas recovery system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Compression step 1, receiving the tail gas, and compressing the pressure of each gas component in the tail gas to the same level, the specific operation is as follows: (1) Send the tail gas 1a from the butanol system to the inlet T1 of the compression mechanism X1, and pass it once The first compressor A1 is boosted to 0.4MPaA and then cooled to 40°C. (2) Mix the cooled tail gas with the tail gas 1b from the high-pressure evaporation system and the stabilization system, and enter the second compressor A2 to increase the pressure to 1.73MPaA and then cool down. (3) The exhaust gas cooled to 40°C is mixed with the purge gas 1c of the carboxyl synthesis reaction system and discharged from the outlet of the compression mechanism X1 in the form of output flow of the compression mechanism X1.

[0089] The rectification step recovers the butyraldehyde and propylene propane mixture in the tail gas. The specific operation steps are as follows: (1) The output flow from the outlet...

Embodiment 2

[0093] Compression step 1, receiving the tail gas, and compressing the pressure of each gas component in the tail gas to the same level, the specific operation is as follows: (1) Send the tail gas 1a from the butanol system to the inlet T1 of the compression mechanism X1, and pass through the first A compressor A1 is boosted to 0.4MPaA and then cooled to 40°C. (2) Mix the cooled tail gas with the tail gas 1b from the high-pressure evaporation system and the stabilization system, and enter the second compressor A2 to increase the pressure to 1.73MPaA and then cool down. (3) The exhaust gas cooled to 40°C is mixed with the purge gas 1c of the carboxyl synthesis reaction system and discharged from the outlet of the compression mechanism X1 in the form of output flow of the compression mechanism X1.

[0094] The rectification step recovers the butyraldehyde and propylene propane mixture in the tail gas. The specific operation steps are as follows: (1) The output flow from the outl...

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Abstract

The invention discloses a 2-ethyl hexanol tail gas recovery system and method. The system comprises a compressing mechanism 1, a rectification mechanism, a compressing mechanism 2 and a copious cooling mechanism, wherein the compressing mechanism 1 is used for receiving tail gas, and compressing the pressure of each gas composition in the tail gas to a same level; the rectification mechanism is used for receiving an output flow from the compressing mechanism 1, and respectively outputting a recovered butyraldehyde flow, a recovered propylene-propane mixed flow and a residual tail gas flow; the compressing mechanism 2 is used for receiving the residual tail gas flow from the rectification mechanism, and outputting the compressed residual tail gas flow; and the copious cooling mechanism is used for receiving the residual tail gas flow from the compressing mechanism 2, separating non-condensable gas in the residual tail gas flow, and receiving propylene-propane in the non-condensable gas. The system disclosed by the invention realizes the acquisition of high-recovery butyraldehyde and a propylene-propane mixture under low energy consumption conditions through the collaborative cooperation of the compressing mechanism 1, the rectification mechanism, the compressing mechanism 2 and the copious cooling mechanism.

Description

technical field [0001] The invention belongs to the field of tail gas treatment, and in particular relates to a butanol tail gas recovery system and a method thereof. Background technique [0002] Butanol is an important alcohol chemical raw material, and it has three important varieties: n-butanol, isobutanol and octanol (or 2-ethylhexanol). N-butanol is mainly used in the production of ester products such as butyl acrylate and dibutyl phthalate. The former is used in coatings and adhesives, and the latter two are plasticizers for PVC. Isobutanol can partially replace the use of n-butanol. Octanol is mainly used to produce PVC plasticizers such as dioctyl phthalate, dioctyl sebacate, etc., and is also used to manufacture octyl acrylate as coatings and adhesives. Butyl octanol products are developed rapidly with the development of petrochemical industry, polyvinyl chloride plastic industry, organic chemical industry and oxo synthesis technology. [0003] The industrial p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07B63/00C07C7/00C07C7/04C07C9/08C07C11/06C07C45/78C07C45/82C07C47/02
Inventor 黄正梁屠高女廖祖维包崇龙王靖岱蒋斌波阳永荣范小强胡东芳洪小东张灵玲訾灿陈毓明颜攀吴美玲
Owner ZHEJIANG UNIV
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