Method for treating and recycling tail gas produced during benzaldehyde production

A technology for tail gas treatment and benzaldehyde, applied in gas treatment, chemical instruments and methods, separation methods, etc., can solve problems such as tail gas reuse, tail gas environmental impact, etc., to reduce production equipment costs, highlight adsorption performance, and good adsorption effect Effect

Active Publication Date: 2017-05-10
HUBEI GREENHOME MATERIALS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] The purpose of the present invention is to provide a method for treating and regenerating tail gas from benzaldehyde production, so as to solve the impact of tail gas on the environment and the problem of tail gas reuse

Method used

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  • Method for treating and recycling tail gas produced during benzaldehyde production

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Embodiment Construction

[0038] In order to better understand the present invention, the present invention will be further described below in conjunction with specific examples.

[0039] like figure 1 As shown, a benzaldehyde production tail gas comprehensive treatment and regeneration system includes a mixing tank 21, a primary condenser 41, a secondary condenser 42, a closed alkali water tank 81, and an adsorption device A. Described mixing kettle 21 is provided with benzaldehyde tail gas inlet c and compressed air inlet d, and the outlet of mixing kettle 21 is connected with the inlet of primary condenser 41, and the outlet of primary condenser 42 is connected with the inlet of secondary condenser 41, The outlet of the secondary condenser 42 is connected with the inlet of the airtight alkali water tank 81, the outlet 83 of the airtight alkali water tank 81 is connected with the activated carbon layer benzaldehyde tail gas inlet 8 of the adsorption device A, and the adsorption device A is provided w...

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Abstract

The invention discloses a method for treating and recycling tail gas produced during benzaldehyde production. Benzaldehyde tail gas produced in a dibenzyl ether oxidizing process is subjected to the treatment of tail gas dilution, tail gas condensation, tail gas water washing and tail gas adsorption. The tail gas is introduced into a plurality of active carbon adsorption devices to perform multi-layer adsorption, thereby emitting purified tail gas without peculiar smell; steam resolution active carbon is adopted periodically for recycling, so that recycling of active carbon is realized, and the tail gas is adsorbed by the adsorption devices; meanwhile, active carbon in other adsorption devices is resolved and recycled, and the adsorption devices work alternatively, so that continuous adsorption of the adsorption devices is ensured, the working efficiency is increased, the production cost is lowered, and the problem of environmental influence caused by the tail gas is solved.

Description

technical field [0001] The invention relates to the preparation of benzaldehyde and the treatment of tail gas, in particular to a method for the treatment and regeneration of benzaldehyde production tail gas. Background technique [0002] Benzaldehyde is an organic compound formed after the hydrogen of benzene is replaced by an aldehyde group. It is flammable, toxic, irritating and has certain dangers; it is used to prepare essences, as solvents for cellulose esters, cellulose ethers, resins, rubbers, etc. Used in plasticizers, it is the most commonly used aromatic aldehyde in industry. There are many preparation methods of benzaldehyde in the industry, and one of them is to use dibenzyl ether as a raw material to prepare and purify benzaldehyde by oxidation. The oxidation reaction process is as follows: [0003] Main reaction: the main products are benzaldehyde, benzyl alcohol, etc. [0004] C 6 h 5 CH 2 OCH 2 C 6 h 5 +O 2 →C 6 h 5 CH 2 OCOOH 2 C 6 h 5 (et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04B01D53/00B01D53/14B01D53/18
CPCB01D53/00B01D53/002B01D53/04B01D53/1493B01D53/18B01D2253/102B01D2253/104B01D2259/4009B01D2259/402
Inventor 余志雄熊江帆习雷茜
Owner HUBEI GREENHOME MATERIALS TECH INC
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