Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for treating fluorine ions in m-aminotrifluorotoluene

A technology of m-aminobenzotrifluoride and aminobenzotrifluoride, which is applied in the field of treatment of fluoride ions in m-aminobenzotrifluoride, can solve the problems of difficulty in popularization and application, limited application range, high processing cost, etc., and achieves remarkable economic benefits, The effect of a wide range of sources and a simple process

Inactive Publication Date: 2020-01-07
JIANGSU FENGHUA CHEM IND
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is only suitable for post-treatment of low-concentration fluorine-containing wastewater or wastewater whose fluorine content has been reduced to 10-20 mg / L. The scope of application is very limited. On the other hand, the contact bed needs to be regenerated, and the regeneration cost is very high; other methods Due to the high processing cost and low efficiency, it is still in the experimental stage and it is difficult to popularize and apply

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

[0019] In the first step, a crude product of m-aminobenzotrifluoride is synthesized by using trifluorotoluene as a raw material, nitrated with mixed acid, and catalytic hydrogenation reduction under normal pressure, and the crude product contains more than 10 ppm of fluoride ions.

[0020] In the second step, 1600 kg of crude m-aminotrifluorotoluene and 1.6 kg of lime essence (the main component of calcium oxide CaO) were mixed and stirred in proportion. The stirring rate was 100 rpm, and the stirring reaction was carried out at 40 ° C for 3 hours. Fluorine The ions combine with the calcium ions of calcium oxide to form calcium fluoride (CaF 2 ), the precipitate was removed by filtration, and the obtained m-aminobenzotrifluoride had a fluoride ion content of ≤10 ppm; the same method was repeated once, and the fluoride ion content was ≤5 ppm; finally, the m-aminobenzotrifluoride was dried , you can get refined m-aminotrifluorotoluene, the yield ≥ 99.9%.

Embodiment 2

[0022] First, synthesize the crude product of m-aminobenzotrifluoride according to the first step method in Example 1, then mix and stir 1600 kg of the crude product of m-aminobenzotrifluoride with 9.6 kg of lime essence (the main component calcium oxide CaO) in proportion, and the stirring rate is 30 rev / min, stirring and reacting at 20°C for 6 hours, the fluoride ions will combine with the calcium ions of calcium oxide to form calcium fluoride (CaF 2 ), the precipitate was removed by filtration, and the obtained m-aminobenzotrifluoride had a fluoride ion content of ≤5 ppm; the same method was repeated once, and the fluoride ion content was ≤1 ppm; finally, the fluoride-removed m-aminobenzotrifluoride was dried , you can get refined m-aminotrifluorotoluene, the yield ≥ 99.9%.

Embodiment 3

[0024] First synthesize the crude product of m-aminobenzotrifluoride according to the first step method in Example 1, then mix and stir 1600 kg of the crude product of m-aminobenzotrifluoride with 2.5 kg of lime essence (the main component calcium oxide CaO) in proportion, and the stirring rate is 75 Turn / min, stirring reaction at 30 ℃ for 5.5 hours, fluoride ions and calcium ions of calcium oxide will combine to form calcium fluoride (CaF 2 ), the precipitate was removed by filtration, and the obtained m-aminobenzotrifluoride had a fluoride ion content of ≤8 ppm; the same method was repeated once, and the fluoride ion content was ≤3 ppm; finally, the m-aminobenzotrifluoride was dried , you can get refined m-aminotrifluorotoluene, the yield ≥ 99.9%.

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

PropertyMeasurementUnit
melting pointaaaaaaaaaa
boiling pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for treating fluorine ions in m-aminotrifluorotoluene, wherein the method is suitable for removing fluorine ions from m-aminobenzotrifluoride in a post-treatment process. According to the invention, refined lime is adopted as a raw material, is a common building material, and has characteristics of wide source, low cost,little corrosion to pipelines and equipment,and safety and reliability to the environment and operators; the adopted refined lime cannot react with m-aminobenzotrifluoride, and can generate calcium fluoride and water after being combined with fluorine ions, calcium fluoride is directly removed through filtration, and water can be treated through the normal product production, such that the process is simple and convenient; and the fluorineions in the m-aminotrifluorotoluene can be efficiently removed, the content of the fluorine ions is generally less than 10 ppm after the m-aminotrifluorotoluene is treated once, and the content of thefluorine ions can reach less than 5 ppm after the m-aminotrifluorotoluene is treated twice.

Description

technical field [0001] The invention relates to a method for post-processing pesticide chemical products, in particular to a method for processing fluoride ions in m-aminotrifluorotoluene. This method is applicable to the situation where m-aminotrifluorotoluene removes fluoride ions in the post-treatment process. Background technique [0002] m-Aminotrifluorotoluene is a colorless or light yellow transparent liquid with a relative density of 1.290, a melting point of 5-6 °C, and a boiling point of 187.5 °C. It is slightly soluble in water and easily soluble in organic solvents such as alcohol and ether. It is widely used in recent years. It is an important fluorine-containing pharmaceutical intermediate, which is widely used in pharmaceutical, pesticide and dye industries. When m-aminotrifluorotoluene is produced industrially, the obtained products usually contain a certain amount of fluoride ions. On the one hand, it is potentially harmful to equipment and the surrounding ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C07C209/84C07C211/52
CPCC07C209/84C07C211/52
Inventor 郑龙生方东张亮李付香
Owner JIANGSU FENGHUA CHEM IND