System and method for recycling NO from acetylfuran oxidized tail gas

An acetylfuran and oxidation tail gas technology, applied in the field of NO recovery, can solve the problems of wasting sodium nitrite raw material resources, incomplete absorption of nitric oxide, inability to remove nitric oxide completely, etc., so as to achieve complete absorption of nitrogen oxides and improve production. On-site and surrounding environment, the effect of reducing equipment

Inactive Publication Date: 2019-04-05
SHANDONG JINCHENG KERUI CHEMICAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the production process adopted by the prior art, there is incomplete nitric oxide absorption, and the "Huanglong" exhaust gas phenomenon caused by nitric oxide seriously pollutes the surrounding environment, and at the same time wastes the nitrous acid needed in the production Sodium raw material resources
At present, the existing domestic production process adopts the technology of water washing and lye absorption. The absorption process cannot completely remove nitric oxide, and produces a large amount of waste dilute nitric acid, sodium nitrate and other difficult-to-handle materials, causing secondary pollution.

Method used

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  • System and method for recycling NO from acetylfuran oxidized tail gas
  • System and method for recycling NO from acetylfuran oxidized tail gas
  • System and method for recycling NO from acetylfuran oxidized tail gas

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Embodiment 1

[0034] Such as figure 1 and 2 Shown, a kind of system that reclaims and utilizes nitrosylsulfuric acid NO from acetylfuran oxidation tail gas, described system comprises: oxidation reaction kettle 1, described reaction kettle is used for carrying out the oxidation reaction of acetylfuran; Absorption kettle 4, described The absorption tank is used to absorb the tail gas generated during the oxidation reaction and can spray the sulfuric acid absorbent downward from the top; the cooling device (not shown in the figure) is set in the absorption tank to cool the generated solution; emptying pipe 3, one end of the emptying pipe is connected with the oxidation reactor, and the other end is connected with the absorption reactor, for discharging the tail gas produced in the oxidation reactor; collection tank 8, the One end of the collection tank communicates with the lower part of the absorption tank for collecting the liquid generated by the reaction in the absorption tank, and the o...

Embodiment 2

[0038] Such as figure 1 and 3 Shown, a kind of system that reclaims and utilizes nitrosylsulfuric acid NO from acetylfuran oxidation tail gas, described system comprises: oxidation reaction kettle 1, described reaction kettle is used for carrying out the oxidation reaction of acetylfuran; Absorption kettle 4, described The absorption tank is used to absorb the tail gas generated during the oxidation reaction and can spray the sulfuric acid absorbent downward from the top; the cooling device (not shown in the figure) is set in the absorption tank to cool the generated solution; emptying pipe 3, one end of the emptying pipe is connected with the oxidation reactor, and the other end is connected with the absorption reactor, for discharging the tail gas produced in the oxidation reactor; collection tank 8, the One end of the collection tank communicates with the lower part of the absorption tank for collecting the liquid generated by the reaction in the absorption tank, and the o...

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PUM

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Abstract

The invention discloses a method and device for recycling nitrosyl sulfuric acid from an acetylfuran oxidized tail gas. The method comprises the following steps: feeding the oxidized tail gas into thedevice containing sulfuric acid, enabling a nitrogen oxide (a mixture of a nitrogen monoxide and a nitrogen dioxide) in the tail gas to chemically react with the sulfuric acid, generating the nitrosyl sulfuric acid, and directly returning the nitrosyl sulfuric acid to an oxidation reaction kettle for using indiscriminately, thereby reducing a dosage of sodium nitrite, reducing a dosage of the sulfuric acid in an oxidation working procedure during production, completely recovering a nitrogen oxide waste gas, protecting the environment, saving raw materials, and reducing production cost.

Description

technical field [0001] The invention relates to a method for recovering NO, in particular to a method and a device for recovering NO from acetylfuran oxidation tail gas. Background technique [0002] The oxidation reaction process of acetylfuran is an important chemical reaction step in the preparation of an important intermediate of the second-generation cephalosporin antibiotic cefuroxime-ammonium furan (SMIA). During the reaction process, due to the needs of the chemical preparation process, a large amount of tail gas containing nitric oxide will be produced in the process. Nitric oxide is very harmful to the human body and the microbial environment. How to effectively absorb and process nitric oxide gas is of great significance to the protection of the environment and the safety of the process. In the production process adopted by the prior art, there is incomplete nitric oxide absorption, and the "Huanglong" exhaust gas phenomenon caused by nitric oxide seriously pollu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/56
CPCB01D53/56B01D53/78B01D2251/506
Inventor 宋道淮王辉杨兆钰吕玲玉代建建
Owner SHANDONG JINCHENG KERUI CHEMICAL CO LTD
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