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Continuous sodium azide water-phase safety production device and process

A sodium azide water and safe production technology, applied in the direction of azide/azide/halogen azide, etc., can solve the problems that are difficult to meet the industrial production practice, and it is difficult to comprehensively improve the production process and safety. Achieve the effect of avoiding VOCs pollution, safe and stable reaction process, and safe reaction

Active Publication Date: 2020-06-09
青岛雪洁助剂有限公司
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Problems solved by technology

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a continuous sodium azide aqueous phase safety production device and process, so as to solve the problem that sodium azide in the prior art is difficult to comprehensively improve the production process during production. and safety, leading to technical problems that are difficult to meet the requirements of industrial production practices

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  • Continuous sodium azide water-phase safety production device and process

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Embodiment 1

[0041] Comply with the above technical solutions, such as figure 1 As shown, the present embodiment provides a continuous sodium azide aqueous phase safety production device, including a nitrite high-level tank 1 and a hydrazine hydrate and sodium hydroxide aqueous solution high-level tank 2, which is characterized in that the nitrite high-level tank Tank 1 links to each other with continuous flow microchannel reactor 5 by compressor or metering pump 3, and the elevated tank 2 of hydrazine hydrate and sodium hydroxide aqueous solution links to each other with continuous flow microchannel reactor 5 by metering pump 4;

[0042] The continuous flow microchannel reactor 5 is connected to the feed port of the gas-liquid separation back pressure tank 6, and the gas outlet of the gas-liquid separation back pressure tank 6 is connected to the gas cooling absorption tank 7 connected in series, and the gas-liquid separation back pressure tank 6 The liquid outlet is connected with a plur...

Embodiment 2

[0047] This embodiment provides a continuous sodium azide aqueous phase safe production process, which adopts the continuous sodium azide aqueous phase safe production device in Example 1.

[0048] Specifically, the nitrite is methyl nitrite, and the temperature of the nitrite elevated tank 1 is normal temperature.

[0049] Specifically, the concentration of sodium hydroxide is 20wt.%.

[0050] The prepared hydrazine and NaOH mixed solution enters the mixed reaction zone through the metering pump 4, and methyl nitrite enters the mixed reaction zone through the compressor 3 through the flow meter, and the reaction residence time is controlled by adjusting the flow rate and the channel length of the continuous flow microchannel reactor 5. The time is 50s, the molar ratio of methyl nitrite, hydrazine hydrate, and sodium hydroxide is controlled to be 1.3:1.05:1.0, the reaction temperature is set to 30°C, the system reaction pressure is 5.0MPa, and the gas-liquid separation tempera...

Embodiment 3

[0052] This embodiment provides a continuous sodium azide aqueous phase safe production process, which adopts the continuous sodium azide aqueous phase safe production device in Example 1.

[0053] Specifically, the nitrite is gaseous ethyl nitrite, and the temperature of the nitrite elevated tank 1 is normal temperature.

[0054] Specifically, the concentration of sodium hydroxide is 20wt.%.

[0055] The prepared hydrazine and NaOH mixed solution enters the mixed reaction zone through the metering pump 4, and the ethyl nitrite enters the mixed reaction zone through the compressor 3 through the flowmeter, and the reaction residence time is controlled by adjusting the flow rate and the channel length of the continuous flow microchannel reactor 5. The time is 80s, the molar ratio of ethyl nitrite, hydrazine hydrate, and sodium hydroxide is controlled to be 1.3:1.05:1.0, the reaction temperature is set to 50°C, the system reaction pressure is 8.0MPa, and the gas-liquid separation...

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Abstract

The invention provides a continuous sodium azide water-phase safety production device and process. The continuous sodium azide water-phase safety production device comprises a continuous flow micro-channel reactor, the continuous flow micro-channel reactor is connected with a feeding hole of a gas-liquid separation back pressure tank, a liquid outlet of the gas-liquid separation back pressure tankis connected with a plurality of reaction mixed liquid temporary storage tanks which are connected in parallel, and the plurality of reaction mixed liquid temporary storage tanks which are connectedin parallel are connected with a feeding hole of a liquid-liquid separator. A water phase outlet of the liquid-liquid separator is connected with a plurality of reaction mixed liquid concentrating andcrystallizing kettles which are connected in parallel, and bottom valves of the plurality of reaction mixed liquid concentrating and crystallizing kettles which are connected in parallel are connected with an automatic centrifugal machine. A continuous production method is adopted, the reaction time is shortened to several seconds to several minutes from several hours in the prior art, the production period is greatly shortened, the reaction process is safer and more stable, and the production efficiency is remarkably improved.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to sodium azide, in particular to a continuous sodium azide aqueous phase safe production device and process. Background technique [0002] Sodium azide is an important chemical raw material, especially in the past two decades, it has been widely used in medicine, pesticide, electronic products and other fields. There are many methods for its synthesis. At present, the method of nitrite + hydrazine hydrate + sodium hydroxide is commonly used in industry. According to the synthesis method of raw material nitrite, it is divided into sulfuric acid + sodium nitrite + alcohol method; dilute nitric acid + Sodium nitrite + alcohol method; ammonia oxidation method + alcohol method; electrodialysis method, etc. Different manufacturers choose process routes according to their funds and specific working conditions, each with its own advantages and disadvantages. Chinese patents with application ...

Claims

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Application Information

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IPC IPC(8): C01B21/08
CPCC01B21/08
Inventor 刘湛刘林学李建民
Owner 青岛雪洁助剂有限公司
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