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Production process for preparing laughing gas by using continuous flow microchannel reactor

A technology of microchannel reactor and channel reactor, which is applied in chemical/physical/physicochemical reactors, nitrous oxide, chemical instruments and methods, and can solve the problems of high risk, low safety factor, and low liquid holding capacity and other issues, to achieve the effect of low cost, reduced material consumption, and less side reactions

Pending Publication Date: 2021-07-27
SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of low safety factor and high risk in the existing industrial production of laughing gas, and provide a production process for preparing laughing gas using a continuous flow microchannel reactor. In this process, the microchannel reactor is used , has the characteristics of extremely low liquid holdup, precise and stable temperature control, no reaction amplification effect, no need for separate scale-up design of the test scale, and thorough reaction, which can significantly reduce the consumption of ammonium nitrate and increase the stability and reliability of the system operation. Energy saving and consumption reduction and environmental protection

Method used

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  • Production process for preparing laughing gas by using continuous flow microchannel reactor
  • Production process for preparing laughing gas by using continuous flow microchannel reactor
  • Production process for preparing laughing gas by using continuous flow microchannel reactor

Examples

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Effect test

Embodiment 1

[0047] A kind of production technology that utilizes continuous flow microchannel reactor to prepare laughing gas, comprises the following steps:

[0048] (a) Take solid ammonium nitrate as raw material, with an annual output of 1000 tons of laughing gas;

[0049] (b) 1950 tons of ammonium nitrate is added to 100 tons of water earlier to prepare a mass concentration of 95% ammonium nitrate solution, with a quality of 2050 tons;

[0050] (c) the ammonium nitrate solution obtained in step (b) is delivered to the microchannel reactor by a pump, and the reactor is passed through an external heating source to maintain the reaction temperature at 220~225° C. Ammonium nitrate is decomposed into laughing gas and water, and the yield 98-99%. The reactor flux per hour is 280kg, while the liquid holding capacity of the reactor with an annual flux of 2000 tons is only 1L, and the residence time is 1 to 2 minutes;

[0051]

[0052]

[0053] d) The gas mixture containing a large amo...

Embodiment 2

[0057] A kind of production technology that utilizes continuous flow microchannel reactor to prepare laughing gas, comprises the following steps:

[0058] (a) be 95% ammonium nitrate solution as raw material with the mass concentration directly produced by the factory, its temperature is about 125 ℃, annual output 1000 tons of laughing gas;

[0059] (b) The 95% concentration of ammonium nitrate solution prepared by the original process is transported to the microchannel reactor by a pump, and heated to 220-225°C in the reactor, and the ammonium nitrate is decomposed into laughing gas and water, and the yield is about 98% ~99%, the yield did not change, but the composition of the output was different due to the presence of gaseous ammonia in the plant's ammonium nitrate solution. The flux of the reactor per hour is still 280kg, and the liquid holding capacity of the reactor with an annual flux of 2000 tons is about 1L, and the residence time is 1 to 2 minutes;

[0060]

[0...

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Abstract

The invention relates to the technical field of production processes for preparing laughing gas by decomposing ammonium nitrate, in particular to a production process for preparing laughing gas by using a continuous flow microchannel reactor. The process comprises the following steps: 1) preparing raw materials: preparing an ammonium nitrate solution by taking an ammonium nitrate solution or solid ammonium nitrate as a raw material; 2) reaction preparation: feeding the ammonium nitrate solution into a micro-channel reactor for reaction, and decomposing ammonium nitrate to generate laughing gas and water; 3) performing gas-liquid separation; and 4) gas cooling. The laughing gas production process disclosed by the invention can be co-produced with industrial ammonium nitrate and a compound fertilizer in a factory, the ammonium nitrate solution is conveyed by a pipeline, the transportation cost is saved, and 92-95% of ammonium nitrate solution is directly adopted, so that steam for melting can be saved, the cost is reduced, the transportation and storage expenses of solid ammonium nitrate are further reduced, the cost is reduced, and the production efficiency is improved. and the safety is improved.

Description

technical field [0001] The invention relates to the technical field of a production process for preparing laughing gas by decomposing ammonium nitrate, in particular to a production process for preparing laughing gas by using a continuous flow microchannel reactor. Background technique [0002] Nitrous oxide, chemical formula N 2 O. Also known as laughing gas, it is a colorless, sweet-smelling gas. It is an oxidant that can support combustion under certain conditions (same as oxygen, because laughing gas can be decomposed into nitrogen and oxygen at high temperatures), but it is stable at room temperature and has a slight Narcotic effect, and can make people laugh. [0003] Nitrous oxide was discovered by Joseph Priestley in 1772. They found that nitrous oxide can make patients feel painless, and after inhalation can still maintain consciousness, not delirious. It wasn't long before laughing gas was used as an anesthetic, especially by dentists. Because dentists usually...

Claims

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Application Information

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IPC IPC(8): C01B21/22B01J19/00
CPCC01B21/22B01J19/0093
Inventor 郭志刚张兵王明权
Owner SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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