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Device for continuously producing methyl nitrite gas and application of device

A methyl nitrite, gas technology, applied in the preparation of nitrite, chemical analysis using catalysis, organic chemistry, etc., can solve the problems of unstable methyl nitrite gas concentration, process or catalyst evaluation influence and other problems

Pending Publication Date: 2020-02-21
SHANGHAI HUAYI ENERGY CHEM
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  • Claims
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Problems solved by technology

[0003] There are some deficiencies in the method of existing continuous production methyl nitrite gas, the methyl nitrite gas that reaction generates is affected by factors such as original concentration, ambient temperature and pressure, promptly generates methyl nitrite gas concentration and is not stable, So that the subsequent process or catalyst evaluation is affected

Method used

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  • Device for continuously producing methyl nitrite gas and application of device
  • Device for continuously producing methyl nitrite gas and application of device

Examples

Experimental program
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Effect test

Embodiment 1

[0108] Use the above-mentioned device for continuous production of methyl nitrite gas and the catalytic reaction evaluation washing system with methyl nitrite as raw material in series, such as figure 1 shown. Before the experiment, 5 kg of raw material liquid was pre-prepared. In terms of mass percentage, the content of nitric acid in the liquid phase raw material was 8%, the content of methanol was 60%, and the content of water was 32%. Turn on N before reacting 2 Purging, the first mixing tank 3, methyl nitrite generation reactor 8, the first gas-liquid separator 9, drier 15, the second mixing tank 19, catalytic reactor 21, the second gas-liquid separator 22 and The entire pipeline is purged with nitrogen, and pressure-maintained and leak-tested to ensure the safety of the system. NO and N 2 Use the first flowmeter 1 such as mass flowmeter, the second flowmeter 2 such as mass flowmeter to set the flow rate as 8ml / min and 60ml / min respectively, enter the methyl nitrite ge...

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Abstract

The invention provides a device for continuously producing methyl nitrite gas and an application of the device. The device comprises a methyl nitrite gas preparation system, a gas analysis system anda first fluid delivery control unit; the methyl nitrite gas preparation system is used for continuously producing methyl nitrite gas; the gas analysis system is used for obtaining the concentration ofthe methyl nitrite gas, wherein the methyl nitrite gas is from the methyl nitrite gas preparation system; and the first fluid delivery control unit is connected with the methyl nitrite gas preparation system and the gas analysis system, is used for making communication between the methyl nitrite gas preparation system and the gas analysis system to provide a to-be-analyzed gas sample for the gasanalysis system, and is also used for controlling product output of the methyl nitrite gas preparation system. According to the invention, stable supply of methyl nitrite gas is realized, the methyl nitrite gas preparation system and a catalytic reaction evaluation system taking methyl nitrite as a raw material are further connected in series, and stability and service life evaluation of a nitricacid reduction reaction for preparing methyl nitrite gas and supply of a stable gas source for a catalytic reaction are realized.

Description

technical field [0001] The invention relates to the technical field of continuous production of methyl nitrite, in particular to a device for continuous production of methyl nitrite gas and its application. Background technique [0002] Methyl nitrite gas is the raw material gas for CO gas-phase coupling to synthesize dimethyl oxalate and other catalytic reactions. In industry, methyl nitrite is regenerated through reaction cycles, and there is no problem of continuous supply of methyl nitrite gas. However, in the experiment In the laboratory test, methyl nitrite is consumable. When studying the process or evaluating the catalyst, due to the instability of methyl nitrite gas, it cannot be purchased in the market and needs to be made by the laboratory. Therefore, designing a set of methyl nitrite gas continuous supply device is of great significance for the laboratory to examine the life of the catalyst for the reaction of CO and methyl nitrite. [0003] There are some defic...

Claims

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Application Information

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IPC IPC(8): C07C201/04C07C203/00G01N31/10
CPCC07C201/04G01N31/10C07C203/00
Inventor 王志光朱燕杨菊群季维鹏
Owner SHANGHAI HUAYI ENERGY CHEM
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