Process for recovery and purification of nitrous oxide from nitrous oxide-containing gas mixture

A technology of nitrous oxide and gas mixture, which is applied in the fields of nitrous oxide, nitrous oxide capture, chemical instruments and methods, etc., which can solve the problems of low recovery rate and achieve the effect of reducing greenhouse gases

Pending Publication Date: 2019-03-15
KOREA RES INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Therefore, as shown in the examples of the above-mentioned patents, the recovery rate of nitrous oxide is as low as about 50% of the total nitrous oxide content contained in the adipic acid off-gas supplied to the purification process

Method used

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  • Process for recovery and purification of nitrous oxide from nitrous oxide-containing gas mixture
  • Process for recovery and purification of nitrous oxide from nitrous oxide-containing gas mixture
  • Process for recovery and purification of nitrous oxide from nitrous oxide-containing gas mixture

Examples

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Embodiment 1

[0096] Such as figure 1 Shown, the recovery and purification method of nitrous oxide carried out in the present invention is the recovery and purification method of intermediate plant scale. Specific method reference for the method of recovering and purifying nitrous oxide from waste gas produced in the production process of adipic acid figure 1 A detailed description.

[0097] (1) Pretreatment process: In the pretreatment process (10), the waste gas produced in the adipic acid production process is supplied through the supply device (11), and then removed in the first flocculator (12) and filter device (13) Moisture, fine oil droplets and dust contained in the exhaust gas. The above-mentioned first flocculator is equipped with a 200-mesh stainless steel mesh with a thickness of 20 cm. The stainless steel mesh has a diameter of 30 cm and a length of 60 cm. The filter unit described above was equipped with a bag filter made of polyester material. The bag filter has a dia...

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Abstract

The present invention relates to a process for recovering and purifying nitrous oxide from a gas mixture generated in industrial processes, such as a nitrous oxide (N2O) production process by pyrolysis of ammonium nitrate, an adipic acid production process, a nitric acid production process, and a caprolactam production process.

Description

technical field [0001] The present invention relates to nitrous oxide (N 2 O) A method for recovering and purifying nitrous oxide from gaseous mixtures produced in industrial processes such as production processes, adipic acid production processes, nitric acid production processes, and caprolactam production processes. In particular, the present invention relates to a method for recovering nitrous oxide with high purity and high yield from exhaust gases generated during the production of nitrous oxide, adipic acid, nitric acid, caprolactam, etc. Background technique [0002] Recently, nitrous oxide (N 2 O) demand has increased significantly. Dinitrogen monoxide is used in the process of forming a silicon oxide layer by reacting with silane either chemically or by plasma deposition. Dinitrogen monoxide is also used to nitride thin silicon films. [0003] Nitrous oxide is produced industrially by the pyrolysis of ammonium nitrate. At this time, purification is required to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/22B01D53/22B01D53/02B01D3/00
CPCB01D3/00B01D53/02B01D53/22C01B21/22Y02C20/10Y02P20/151Y02P20/30Y02P70/10
Inventor 金顶薰李寿福朴仁濬河钟郁姜镐哲张奉畯李光远陆信洪李相九朴保玲
Owner KOREA RES INST OF CHEM TECH
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