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Microchannel reaction system and technology for continuously synthesizing isopropyl nitrate

A technology of isopropyl nitrate and microchannels is applied in the directions of nitrate preparation, chemical/physical/physicochemical reactors, chemical instruments and methods, and can solve the problems of low yield of isopropyl nitrate and difficult reaction process, etc., To avoid the danger of flying temperature, improve the yield, and avoid the effect of solid waste salt

Pending Publication Date: 2021-11-09
XIAN MODERN CHEM RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For the deficiencies in the prior art, the object of the present invention is to provide a microchannel reaction system and process for continuously synthesizing isopropyl nitrate, to solve the problem that the reaction process in the prior art is difficult to control and cause the yield of isopropyl nitrate to be low. technical problem

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  • Microchannel reaction system and technology for continuously synthesizing isopropyl nitrate

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Embodiment 1

[0060] Present embodiment provides a kind of microchannel reaction system of continuous synthesis isopropyl nitrate, as figure 1 Shown, comprise isopropanol sampling metering pump 1, isopropanol passes into from the sample inlet 101 place of isopropanol sampling metering pump 1, the sample outlet 102 of isopropanol sampling metering pump 1 is connected with microchannel The sample inlet 201 of the isopropanol precooler 2 is connected, and the sample outlet 202 of the microchannel isopropanol precooler 2 is connected with the sample inlet 301 of the microchannel nitration reaction device 3;

[0061] Also includes nitric acid sampling metering pump 4, high-purity refined nitric acid is introduced from the sample inlet 401 of nitric acid sampling metering pump 4, the sample outlet 402 of nitric acid sampling metering pump 4 is connected to the inlet of microchannel nitric acid precooling device 5 The sample port 501 is connected, and the sample outlet 502 of the microchannel nitr...

Embodiment 2

[0068] The present embodiment provides a kind of technique of continuous synthesis of isopropyl nitrate, and this technique adopts the microchannel reaction system of continuous synthesis of isopropyl nitrate in embodiment 1. The process specifically includes the following steps:

[0069] Step 1, prepare preliminary reaction product:

[0070] Step 1.1, pre-cool raw materials:

[0071] Set the precooling temperature of the microchannel isopropanol precooling device 2 to 5°C, use the isopropanol injection metering pump 1 to control the injection flow rate of isopropanol to 12.8mL / min, add isopropanol to the micro Channel isopropanol pre-cooling device 2 for cooling. Set the precooling temperature of the microchannel nitric acid precooling device 5 to 5°C, use the nitric acid sampling metering pump 4 to control the injection flow rate of the high-purity refined nitric acid to 7mL / min, and add the high-purity refined nitric acid to the microchannel nitric acid precooling unit. ...

Embodiment 3

[0083] The present embodiment provides a kind of technique of continuous synthesis of isopropyl nitrate, and this technique adopts the microchannel reaction system of continuous synthesis of isopropyl nitrate in embodiment 1. The process specifically includes the following steps:

[0084] In this embodiment, step 1 is basically the same as step 1 of embodiment 2, the difference is:

[0085] In step 1.1, the precooling temperature of the microchannel isopropanol precooling device 2 and the microchannel nitric acid precooling device 5 were both 10°C, and the injection flow rate of the high-purity refined nitric acid was controlled at 8.7mL / min. In step 1.2, the reaction temperature of the microchannel nitration reaction device 3 is set to 10° C., and the average residence time of isopropanol and high-purity refined nitric acid in the microchannel nitration reaction device 3 is 25.0 s.

[0086] In this embodiment, step 2 is basically the same as step 2 of embodiment 2, the diffe...

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Abstract

The invention provides a microchannel reaction system and technology for continuously synthesizing isopropyl nitrate. Reaction raw materials comprise isopropanol and high-purity refined nitric acid; and a micro-channel reaction system for continuously synthesizing isopropyl nitrate is adopted, a continuous nitration reaction is carried out under the low-temperature condition, a preliminary reaction product is prepared, and isopropyl nitrate is finally prepared after the preliminary reaction product is subjected to centrifugal acid ester separation, centrifugal alkali washing and centrifugal salt washing. According to the technology for continuously synthesizing isopropyl nitrate, high-purity refined nitric acid is adopted as a reaction raw material, the whole continuous nitration reaction is carried out under the low-temperature condition, the technology adopts the micro-channel reaction system for continuously synthesizing isopropyl nitrate, accurate control over the reaction process can be achieved, finally, high-purity isopropyl nitrate can be prepared, and the yield of isopropyl nitrate is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, relates to the field of nitrate ester preparation, in particular to a microchannel reaction system and process for continuously synthesizing isopropyl nitrate. Background technique [0002] Isopropyl nitrate (IPN) is a low-sensitivity, volatile, and explosive liquid that is widely used in the field of military and civilian products. In terms of national defense and military applications, it is an important part of cloud bombs, and can also be used as a single jet fuel for ballistic weapons and rocket propulsion; in civilian applications, it is often used as a fuel additive for automobiles (gasoline, diesel) to improve the combustion of fuel oil. And large-scale application. [0003] In the prior art, the synthesis process of isopropyl nitrate is as follows: take isopropanol as the starting material, concentrated nitric acid with a mass fraction of 68% is the nitrating reagent, add urea...

Claims

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Application Information

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IPC IPC(8): C07C201/02C07C203/04B01J4/02B01J19/00B01J4/00
CPCC07C201/02B01J4/02B01J4/008B01J4/001B01J19/0093B01J2204/002B01J2204/005B01J2204/007B01J2219/00891B01J2219/0086C07C203/04
Inventor 毛明珍张媛媛张选利张晓光卫天琪张建功
Owner XIAN MODERN CHEM RES INST
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