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Continuous nitroguanidine production system and process

A production system, technology of nitroguanidine, applied in the field of continuous nitroguanidine production system and technology, can solve the problems of environmental pollution, discharge of a large amount of solid waste, waste of resources, etc.

Pending Publication Date: 2020-12-29
西安万德能源化学股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a continuous nitroguanidine production system and process to solve the complex existing nitroguanidine preparation process mentioned in the above background technology, and a large amount of waste liquid, waste gas or waste will be discharged during the preparation process. Other solid wastes pollute the environment, and the by-products produced during the preparation of nitroguanidine cannot be reused, resulting in a serious waste of resources

Method used

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  • Continuous nitroguanidine production system and process
  • Continuous nitroguanidine production system and process
  • Continuous nitroguanidine production system and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, a continuous nitroguanidine production system includes a concentrated nitric acid storage tank 1, a solid feeder 2, a mixing tank 3, a transfer tank 4, a microchannel reaction assembly, a dilute nitric acid storage tank, a diluted crystallization tank 6, and a waste water receiving tank. Tank 7, industrial centrifuge 8, washing kettle 9 and gunpowder smoke absorption device; concentrated nitric acid storage tank 1 and solid feeder 2 are all connected to mixing kettle 3, wherein solid feeder 2 is fixedly connected to the feeding port of mixing kettle 3 Concentrated nitric acid is filled between the concentrated nitric acid storage tank 1 and the mixing kettle 3 through a diaphragm metering pump 13, and the concentrated nitric acid storage tank 1 is placed on the first electronic scale 12 for material measurement.

[0032] The discharge port of mixing still 3 is connected with the feed inlet of transfer still 4, and transfer still 4 is connected...

Embodiment 2

[0049] Such as figure 2 Shown, a kind of continuous nitroguanidine production technique comprises the steps:

[0050] S1. Pump concentrated nitric acid from the concentrated nitric acid storage tank 1 into the mixing kettle 3 through the metering pump, start stirring, and simultaneously open the refrigerant inlet and outlet valves of the jacket of the mixing kettle 3;

[0051] S2. When the concentrated nitric acid in the mixing kettle 3 is cooled to a specific temperature, start the solid feeder 2 and measure it through an electronic scale, add the guanidine nitrate in the hopper into the mixing kettle 3 drop by drop, and control the mixing through the first low-temperature cooling circulation device 14 The temperature of the material in the kettle 3 is 0±5°C;

[0052] S3, use the gear pump 28 to pass the mixed solution into the microchannel reactor 10, control the temperature in the microchannel reactor 10 through the high temperature circulation device 15, the temperature ...

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Abstract

The invention discloses a continuous nitroguanidine production system and process. The continuous nitroguanidine production system comprises a concentrated nitric acid storage tank, a solid feeding machine, a mixing kettle, a turning kettle, a micro-channel reaction assembly, a dilute nitric acid storage tank, a dilution crystallization kettle, a wastewater receiving tank, a washing kettle and a nitrate smoke absorption device. The concentrated nitric acid storage tank and the solid feeder are connected with the mixing kettle, a discharge port of the mixing kettle is connected with a feed portof the swivel kettle, the turning kettle is connected with the dilution crystallization kettle through the micro-channel reaction assembly, a feed port and a water inlet of the dilution crystallization kettle are respectively connected with the dilute nitric acid storage tank and the wastewater receiving tank, and a discharge port of the dilution crystallization kettle is connected with the industrial centrifuge. A filtrate outlet of the industrial centrifuge is connected with a waste acid receiving tank. According to the continuous nitroguanidine production system capable of preparing nitroguanidine containing 25% of water, 50% of dilute nitric acid is adopted for crystallization, high-purity nitroguanidine and by-products are obtained through multiple times of washing treatment and centrifugal dehydration, the by-products serve as raw materials to be repeatedly used, and no waste liquid, no waste gas and no solid waste are achieved.

Description

technical field [0001] The invention relates to the technical field related to chemical synthesis, in particular to a continuous nitroguanidine production system and process. Background technique [0002] Nitroguanidine, also known as peridotite, has a molecular formula of CH 4 N 4 o 2 , molecular weight 104.07, white crystal, density 1.715g / cm 3 , slightly soluble in water, nitroguanidine is a raw material for organic synthesis, used as an intermediate for imidacloprid and acetamiprid in pesticides, and used for the synthesis of N-nitroiminoimidazolidine, an intermediate in the next step. In addition, it is reduced Aminoguanidine can be used to synthesize angina pectoris drug Lekoan, etc. It can also be used in the preparation of explosives and smokeless water medicine. Used in organic synthesis, preparation of aminoguanidine, drug Lekoan, etc. It can also be used for the preparation of explosives and smokeless powder. Its existing preparation method is that guanidine ...

Claims

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Application Information

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IPC IPC(8): B01J19/00B01D9/02C07C277/08C07C279/34
CPCB01D9/0045B01D9/0059B01D2009/0086B01J19/0093C07C277/08C07C279/34
Inventor 王育斌李海斌井军平丁金皓武新军杨亚妮
Owner 西安万德能源化学股份有限公司
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