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A kind of continuous synthesis process of guanidine nitrate

A technology for guanidine nitrate and chemical synthesis, which is applied in the chemical industry, can solve the problems of destroying the ratio of raw materials, unstable product quality and yield, difficult reaction control, etc., and achieves the effects of reduced operating intensity, stable quality and high yield.

Active Publication Date: 2015-09-23
NANTONG TENDENCI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic manufacturers all adopt the batch reaction process, and the raw materials are put in at one time. After the heating reaction, due to the obvious thermal effect, the reaction control is difficult. The diguanidine nitrate (guanidine amidino nitrate) produced in the reaction process is a strong base, causing the ammonium nitrate to decompose and release NH3 is released, destroying the ratio of raw materials, and the quality and yield of products are unstable

Method used

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  • A kind of continuous synthesis process of guanidine nitrate
  • A kind of continuous synthesis process of guanidine nitrate
  • A kind of continuous synthesis process of guanidine nitrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 288g of ammonium nitrate (3.6mol) and 151.2g of dicyandiamide (1.8mol) into a 500ml melting kettle equipped with a thermometer, stirring, and an addition funnel, and start heating and melting at 120°C, and continue to heat up to 130°C , start continuous reaction after half an hour of heat preservation. During the reaction process, the feeding speed is controlled by two small screw feeders, and the raw materials are smoothly and evenly added into the melting kettle. The speed of adding dicyandiamide is 150g / h, and the speed of ammonium nitrate is 300g / h. The temperature is 130±5 degrees, and the average residence time is 1 hour. The molten material overflows from the opening on the side of the melting tank into the 500ml primary reactor. The temperature of the primary reactor is controlled at 180±5 degrees, and the average residence time is 1 hour. , the speed of feeding ammonia is 15g / h, and the reacted material overflows from the opening on the side of the primary ...

Embodiment 2

[0035] Add 288g of ammonium nitrate (3.6mol) and 151.2g of dicyandiamide (1.8mol) into a 500ml melting kettle equipped with a thermometer, stirring, and an addition funnel, and start heating and melting at 120°C, and continue to heat up to 130°C , start continuous reaction after half an hour of heat preservation. During the reaction process, the feeding speed is controlled by two small screw feeders, and the raw materials are smoothly and evenly added to the melting kettle. The speed of adding dicyandiamide is 200g / h, and the speed of ammonium nitrate is 400g / h. The temperature is 130±5 degrees, and the average residence time is 1 hour. The molten material overflows from the opening on the side of the melting tank into the 500ml primary reactor. The temperature of the primary reactor is controlled at 180±5 degrees, and the average residence time is 1 hour. , the speed of feeding ammonia is 15g / h, and the reacted material overflows from the opening on the side of the primary re...

Embodiment 3

[0037] Add 288g of ammonium nitrate (3.6mol) and 151.2g of dicyandiamide (1.8mol) into a 500ml melting kettle equipped with a thermometer, stirring, and an addition funnel, and start heating and melting at 120°C, and continue to heat up to 130°C , start continuous reaction after half an hour of heat preservation. During the reaction process, the feeding speed is controlled by two small screw feeders, and the raw materials are smoothly and evenly added to the melting kettle. The speed of adding dicyandiamide is 100g / h, and the speed of ammonium nitrate is 200g / h. The temperature is 130±5 degrees, and the average residence time is 1 hour. The molten material overflows from the opening on the side of the melting tank into the 500ml primary reactor. The temperature of the primary reactor is controlled at 180±5 degrees, and the average residence time is 1 hour. , the rate of feeding ammonia gas is 7.5g / h, and the reacted material overflows from the opening on the side of the primar...

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Abstract

The invention discloses a continuous production process of guanidine nitrate. The method comprises the following steps: 1) The material is continuously added into a melting tank in proportion, the temperature of the melting tank is controlled, and the material overflows after melting and enters the first-level reaction tank; 2) Control the temperature and residence time of the first-stage reactor, continuously feed ammonia into the first-stage reactor, and the reacted material overflows into the second-stage reactor; 3) Control the reaction temperature and residence time of the second-stage reactor, the second-stage reactor Ammonia gas is continuously fed into the reaction kettle, and the reacted material is cooled, sliced ​​and packaged to obtain the finished product of guanidine nitrate. The synthesis process of the present invention is carried out continuously in the whole process, the operation is stable, the operation intensity is greatly reduced, and the product yield is high, the quality is good, and the output is high.

Description

technical field [0001] The invention relates to a preparation method of guanidine nitrate, in particular to a continuous synthesis process of guanidine nitrate, which belongs to the technical field of chemical industry. Background technique [0002] Guanidine nitrate is a widely used chemical raw material. It is white crystalline powder or granules, easily soluble in water and alcohol, and has irritating effects on eyes, skin, mucous membranes and upper respiratory tract. Guanidine nitrate is a raw material for the production of sulfa drugs such as sulfamidine and sulfadiazine, and explosives such as nitroguanidine. It is also used in the production of guanidine carbonate and other guanidine salts, as well as in the paint industry, photographic materials and disinfectants. Due to the low light and heat emitted by guanidine nitrate, it has its special value as propellant powder. [0003] The preparation method of guanidine nitrate varies from country to country, mainly inclu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C279/02C07C277/02
Inventor 黄辉张烨方坤钰周书平
Owner NANTONG TENDENCI CHEM