Production technique of guanidine nitrate

A production process and a technology for guanidine nitrate, applied in the field of guanidine nitrate production technology, can solve the problems of increasing unsafe factors, too intense reaction, affecting product purity and the like, and achieve the effects of convenient control of process conditions, improved quality and improved safety

Active Publication Date: 2014-07-30
BEILITE CHEM CO LTD +2
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of producing guanidine nitrate in the above-mentioned patent documents and prior art, owing to adopting ammonia gas as an auxiliary agent, on the one hand, relevant equipment such as liquid ammonia storage tanks are required, which increases unsafe factors and improves production costs; on the other hand, due to During the melting reaction of ammonia gas with dicyandiamide and ammonium nitrate, the reaction process needs to be strictly controlled to prevent impurities such as melamine, melamine-amide and melamine-diamide from being generated when the whole reaction is too intense or the temperature is too high, which will affect the post-reaction process. product purity
The purity of the finished product of guanidine nitrate produced by the existing technology is up to below 92%.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] After mixing 500g of dicyandiamide, 904g of ammonium nitrate, and 45g of ammonium carbonate, heat the reactor through the jacket on the reactor. When the temperature in the reactor rises to about 120°C, slowly add the mixed After the homogeneous material, when all the solids in the reactor are dissolved and the temperature in the reactor reaches 140°C, stop heating, and make the materials in the reactor melt and react under stirring. When the temperature in the reactor was raised to about 210°C, the temperature in the reactor was controlled to be maintained at 210°C by the flow of the cooling medium in the jacket, and after 10 minutes of heat preservation, the finished product 1311.3g of guanidine nitrate was discharged to obtain 1311.3g of the finished product. The content of guanidine nitrate is 94.32%, that is, the purity of guanidine nitrate is 94.32%.

Embodiment 2

[0015] After mixing 1000g of dicyandiamide, 1802g of ammonium nitrate and 14.01g of ammonium carbonate evenly, heat the reaction kettle through the jacket on the reaction kettle. When the temperature in the reaction kettle rises to about 130°C, slowly add After mixing the materials evenly, when all the solids in the reactor are dissolved and the temperature in the reactor reaches 150°C, stop heating, and make the materials in the reactor melt and react under stirring. When the temperature in the reactor was raised to about 195°C, the temperature in the reactor was controlled at 195°C through the flow of the cooling medium in the jacket, and after 15 minutes of heat preservation, 2200g of finished product of guanidine nitrate was discharged to obtain 2200g of guanidine nitrate. The content of guanidine is 95.66%, that is, the purity of guanidine nitrate is 95.66%.

Embodiment 3

[0017] After mixing 500g of dicyandiamide, 908g of ammonium nitrate and 90g of ammonium carbonate evenly, heat the reaction kettle through the jacket on the reaction kettle. When the temperature in the reaction kettle rises to about 125°C, slowly add the mixed After the homogeneous material, when all the solids in the reactor are dissolved and the temperature in the reactor reaches 145°C, stop heating, and make the materials in the reactor melt and react under stirring. When the temperature in the reactor was raised to about 208°C, the temperature in the reactor was controlled at 208°C through the flow of the cooling medium in the jacket. After 12 minutes of heat preservation, the finished product of guanidine nitrate was discharged to obtain 1308g of guanidine nitrate. The content of guanidine nitrate is 94.12%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a production technique of a chemical product, particularly a production technique of guanidine nitrate, which comprises the following steps: mixing raw materials, and carrying out fusion reaction. The weight percent of the guanidine nitrate in the guanidine nitrate finished product is greater than 94%. By using ammonium carbonate instead of ammonia gas in the prior art as an assistant in the production process, the technique has the following advantages:1. the technique is simple and convenient for controlling technological conditions;2. the quality of the product is greatly improved: the maximum purity of the product obtained by the prior art is lower than 92%, but the purity of the product obtained by the technique is high than 94%, which is a qualitative improvement for large-scale production; and 3. the safety in the production process is enhanced: the technique does not need liquid ammonia storage tanks, transmission pipelines and other dangerous facilities in the existing production process, thereby greatly enhancing the safety in the production process.

Description

technical field [0001] The invention relates to a production method of chemical products, in particular 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] In the existing disclosed guanidine nitrate production process, dicyandiamide and ammonium nitrate are mainly used as raw materials for melting reaction. After the reaction is completed and cooled, solid guanidine nitrate is obtained by slicing w...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C07C279/34C07C277/08
Inventor 赵黎明杨文茂朱翠香杨波杜莹
Owner BEILITE CHEM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap