Method for separating and preparing electronic grade nitrous oxide from medical grade nitrous oxide

An electronic-grade, nitrous oxide technology, applied in the directions of nitrous oxide, nitrogen oxides/oxyacids, etc., can solve the problems of unsatisfactory adsorption capacity and selectivity, and achieve no solvent volatilization and loss, high selectivity, The effect of large absorption capacity

Inactive Publication Date: 2017-01-18
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned adsorbent materials are all solid, which have the advantages of simple operation, fast separation rate, little corrosion to e

Method used

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  • Method for separating and preparing electronic grade nitrous oxide from medical grade nitrous oxide

Examples

Experimental program
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Effect test

Embodiment 1

[0021] combined with figure 1 A method of separating and preparing electronic grade nitrous oxide from medical grade nitrous oxide in the method of the present invention is as follows: the first gas compressor (1) will contain N 2 O accounts for the medical grade laughing gas that volume fraction is 99% and is compressed to the pressure of 0.3 MPa, is then transported to the inlet of spray absorption tower (2) and is positioned at bottom side by pipeline; The tower top temperature setting of spray absorption tower (2) At 40°C, the medical grade laughing gas flowing from bottom to top will contact the trihexyltetradecylphosphonium methionine ionic liquid in the tower, thereby removing most of the CO in the medical grade laughing gas 2 、H 2 O, NO, NO 2 , and then enter the drying tower (3) through the upper outlet through the pipeline; in the drying tower (3), the medical grade laughing gas flowing from bottom to top will contact with the silica gel in the tower, thereby remov...

Embodiment 2

[0023] combined with figure 1 A method of separating and preparing electronic grade nitrous oxide from medical grade nitrous oxide in the method of the present invention is as follows: the first gas compressor (1) will contain N 2 O accounts for the medical grade laughing gas that volume fraction is 99% and is compressed to the pressure of 0.5 MPa, is then transported to the inlet of spray absorption tower (2) and is positioned at bottom side by pipeline; The tower top temperature setting of spray absorption tower (2) At 70°C, the medical grade nitrous oxide flowing from bottom to top will contact the trihexyltetradecylphosphonoproline ionic liquid in the tower, thereby removing most of the CO in the medical grade nitrous oxide 2 、H 2 O, NO, NO 2 , and then enter the drying tower (3) through the upper outlet through the pipeline; in the drying tower (3), the medical grade laughing gas flowing from bottom to top will contact with the silica gel in the tower, thereby removing ...

Embodiment 3

[0025] combined with figure 1 A method of separating and preparing electronic grade nitrous oxide from medical grade nitrous oxide in the method of the present invention is as follows: the first gas compressor (1) will contain N 2 O accounts for the medical grade laughing gas that volume fraction is 99% and is compressed to the pressure of 0.4 MPa, is then transported to the inlet of spray absorption tower (2) and is positioned at bottom side by pipeline; The tower top temperature setting of spray absorption tower (2) At 60°C, the medical grade nitrous oxide flowing from bottom to top will contact the trihexyltetradecylphosphonium methionine ionic liquid in the tower, thereby removing most of the CO in the medical grade nitrous oxide 2 、H 2 O, NO, NO 2 , and then enter the drying tower (3) through the upper outlet through the pipeline; in the drying tower (3), the medical grade laughing gas flowing from bottom to top will contact with the silica gel in the tower, thereby rem...

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Abstract

A method for separating and preparing electronic grade nitrous oxide from medical grade nitrous oxide is characterized in that an ionic liquid is introduced to the preparation process of the electronic grade nitrous oxide, and the alkaline ionic liquid is adopted as an absorbent to trap acidic gases in the medical grade nitrous oxide. The method has the advantages of large absorption capacity, high selectivity, no solvent volatilization and no solvent loss.

Description

technical field [0001] The invention belongs to the technical field of gas separation, and in particular relates to a method for separating and preparing electronic-grade laughing gas from medical-grade laughing gas. Background technique [0002] Laughing gas, whose chemical name is nitrous oxide, is a colorless, sweet gaseous oxidant with a boiling point of -88.49°C. It is stable at room temperature, has a slight anesthetic effect, and can make people laugh. At present, the main production methods of laughing gas are ammonium nitrate thermal decomposition method and ammonia contact oxidation method. It is relatively easy to prepare laughing gas with a purity of 99% (2N, medical grade) through the above two methods, which can be used It is suitable for human anesthesia, that is, it meets the medical requirements, and many domestic manufacturers can produce it. [0003] High-purity laughing gas refers to laughing gas with a purity of more than 99.999% (5N, electronic grade)....

Claims

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Application Information

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IPC IPC(8): C01B21/22
CPCC01B21/22
Inventor 沈剑
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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