Method for recovering ultra-high purity nitrous oxide

A nitrous oxide and ultra-high-purity technology, applied in the direction of nitrous oxide, nitrogen oxides/oxyacids, etc., can solve the problems of environmental damage, single treatment method, waste, etc., and achieve a high degree of automation and broad application prospects , the effect of a large amount of processing

Inactive Publication Date: 2017-12-26
绿菱电子材料(天津)有限公司
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Problems solved by technology

The most important source is the tail gas in the chemical industry, such as the production process of nylon and nitric acid. Since the tail gas discharged from these production devices contains a large amount of nitrous oxide, if it cannot be properly treated, it will definitely cause serious damage. environmental issues
[0004] At present, the commonly used treatment method is to absorb the above-mentioned tail gases with activated carbon and then discharge them. Since the treatment method is relatively simple and inc

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  • Method for recovering ultra-high purity nitrous oxide

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Embodiment Construction

[0048] Embodiments of the present invention will be described in detail below in conjunction with examples, but those skilled in the art will understand that the following examples are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. Those who do not indicate the specific conditions in the examples are carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used were not indicated by the manufacturer, and they were all commercially available conventional products.

[0049] Such as figure 1 As shown, the device sequentially includes a first-stage water washing tower 1, a first-stage organic solvent washing tower 2, a second-stage organic solvent washing tower 3, a heat exchanger 4, a buffer tank 5, a compression pump 6, a pressure swing adsorption device 7, A temperature swing adsorption device 8 , a first-stage rectification towe...

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Abstract

The invention discloses a method for recovering ultra-high purity nitrous oxide. The method comprises S1, carrying out three-step washing treatment on exhaust gas containing nitrous oxide orderly through a one-step water washing device and a two-step organic solvent washing device, S2, cooling the exhaust gas through a heat exchanger, S3, carrying out two-step adsorption treatment on the exhaust gas through a pressure swing adsorption device and a temperature swing adsorption device, and S4, carrying out two-step rectification treatment on the exhaust gas orderly through a one-step rectification tower and a two-step rectification tower. Through cooperation of the above processes, nitrous oxide in the exhaust gas can be completely separated and ultra-high purity nitrous oxide gas having purity greater than or equal to 99.99999% is obtained. The method meets the requirements on industrial and laboratory ultra-high purity nitrous oxide, greatly reduces environmental pollution caused by the emission of nitrous oxide, realizes recovery and use of nitrous oxide, prevents wastes and saves resources.

Description

technical field [0001] The invention relates to a method for recovering nitrous oxide, in particular to a method for recovering ultra-high purity nitrous oxide. Background technique [0002] Nitrous oxide, also known as laughing gas, is a colorless, sweet-smelling gas oxidant, because it can be decomposed into nitrogen and oxygen at high temperature, so it can support combustion under certain conditions. But it is stable at room temperature, has a slight anesthetic effect, and can make people laugh, and is now mainly used in performances. In August 2009, a new study in the United States showed that nitrous oxide has become the primary ozone-depleting substance emitted by humans, and its single-molecule warming potential is 310 times that of carbon dioxide. One of the greenhouse gases. [0003] Nitrous oxide mainly comes from human production and living processes. The most important source is the tail gas in the chemical industry, such as the production process of nylon an...

Claims

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Application Information

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IPC IPC(8): C01B21/22
CPCC01B21/22
Inventor 钟少勇王新鹏赵伟庆
Owner 绿菱电子材料(天津)有限公司
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