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Production process of guanidine nitrate

A production process and a technology for guanidine nitrate, applied in the production process field of guanidine nitrate, can solve problems such as low content and yield, and achieve the effect of improving yield

Inactive Publication Date: 2013-02-13
NANTONG TENDENCI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the reported synthesis method of guanidine nitrate is mainly prepared by the reaction of ammonium nitrate and dicyandiamide, and the content and yield of the product are relatively low, the content is about 88%, and the yield is 87%.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Divide 1050Kg (13.125Kmol) of ammonium nitrate and 525Kg (6.25Kmol) of dicyandiamide into 7 equal parts, and then add the first part of dicyandiamide and ammonium nitrate to the 2000-liter enamel reaction kettle with stirring and thermometer. The reaction temperature is controlled between 130-140°C. When one portion of raw materials is added, the reaction mixture is in a molten state and the reaction temperature is at 130-140°C, then the next portion of raw materials is added until the reaction raw materials are added. It takes about 80- 90 minutes, then increase the reaction temperature to 145-155°C and keep warm for 60 minutes, and finally further increase the reaction temperature to 210-220°C. After 30 minutes of reaction, the reaction ends. After cooling and slicing, the product of guanidine nitrate is obtained: 1563 Kg , content: 94.5%, molar yield: 96.85%.

Embodiment 2

[0012] The process is the same as in Example 1, except that the raw material composition is 1100Kg (13.75Kmol) of ammonium nitrate and 525Kg (6.25Kmol). After the reaction, the guanidine nitrate product is obtained: 1610 Kg, content: 92.3%, and molar yield: 97.44%.

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PUM

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Abstract

The invention discloses a production process of guanidine nitrate. Ammonium nitrate and dicyandiamide serving as raw materials are reacted to make guanidine nitrate. The production process is characterized in that a batch feeding mode is adopted, ammonium nitrate and dicyandiamide are mixed and then added into a reaction kettle in batches, the feeding times is 5-10, and the feeding reaction temperature is controlled to be 130-140 DEG C; when feeding of one batch of raw materials is finished and a reaction mixture is in a molten state and the reaction temperature is 130-140 DEG C, a next batch of raw materials are added until feeding of the reaction raw materials is finished; after feeding is finished, thermal insulation reactions are continued to be performed for 30-60min at 145-155 DEG C until an addition reaction is over, then the temperature is continued to be warmed to 210-220 DEG C within 20-30min, and guanidine nitrate products are obtained when a cracking reaction is over after reaction for 30min. The production process has the advantages that by batch feeding and by controlling corresponding feeding temperature and feeding amount well, the aim of improving the yield coefficient of guanidine nitrate is achieved, the content of the produced guanidine nitrate is larger than 92%, and the mol yield coefficient is larger than 96%.

Description

technical field [0001] The invention relates to a production process of guanidine nitrate. Background technique [0002] Guanidine nitrate 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 not only a raw material for the insecticide imidacloprid in pesticides, but also used for the synthesis of the intermediate nitroguanidine in the next step. , Chlorsulfuron-methyl, etc. In addition, it is also used in the synthesis of sulfa drugs and as a raw material for the manufacture of explosives, photographic materials, and disinfectants. [0003] At present, the reported synthesis method of guanidine nitrate is mainly prepared by the reaction of ammonium nitrate and dicyandiamide, and the content and yield of the product are relatively low, the content is about 88%, and the yield is 87%. Contents of the invention [0004] The purpose of this i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C279/02C07C277/02
Inventor 周甦谭建平金标
Owner NANTONG TENDENCI CHEM
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