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Method for treating fluorine ions in m-aminobenzotrifluoride

A technology of aminobenzotrifluoride and treatment method, which is applied in the field of treatment of fluoride ions in m-aminobenzotrifluoride, can solve the problems of increased fluoride ions and unfavorable human health, and achieves the effect of simple operation

Pending Publication Date: 2022-05-10
李世煜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fluorine in industrial and agricultural wastewater will lead to an increase in fluoride ions in groundwater, which is not conducive to human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A treatment method for fluoride ion in m-aminobenzotrifluoride, comprising the following steps:

[0026] Step 1: chemical precipitation, add ammonia water to the m-aminotrifluorotoluene liquid, adjust the pH to weakly alkaline, the pH range is 7, add calcium carbonate powder, the amount of calcium carbonate powder added is 1 times the stoichiometric amount in the medium, at room temperature, mechanical stirring, the stirring speed is 100r / min, the stirring time is 4h, and the standing time is 1h, and precipitation occurs;

[0027] Step 2: Solid-liquid separation. After step 1 is left standing, the supernatant is drawn out, and the solid precipitate is collected by salvage, and the precipitate is recovered; the precipitate is naturally dried, and the recovered precipitate is CaF 2 ;

[0028] Step 3: coagulation and sedimentation, adjust the pH of the supernatant in step 2, adjust the pH value to 7 for the use of ammonia water, add polyaluminum ferric chloride aqueous s...

Embodiment 2

[0031] A treatment method for fluoride ion in m-aminobenzotrifluoride, comprising the following steps:

[0032] Step 1: chemical precipitation, add ammonia water to the m-aminotrifluorotoluene liquid, adjust the pH to weakly alkaline, the pH range is 9, add calcium carbonate powder, the amount of calcium carbonate powder added is , and replace the fluorine removal reaction 1.5 times of the stoichiometric amount in the medium, at room temperature, mechanically stirred, the stirring speed was 300r / min, the stirring time was 6h, standing still, the standing time was 2h, and precipitation occurred;

[0033] Step 2: Solid-liquid separation. After step 1 is left standing, the supernatant is drawn out, and the solid precipitate is collected by salvage, and the precipitate is recovered; the precipitate is naturally dried, and the recovered precipitate is CaF 2 ;

[0034] Step 3: coagulation and sedimentation, adjust the pH of the supernatant in step 2, adjust the pH value to 9 for the...

Embodiment 3

[0037] A treatment method for fluoride ion in m-aminobenzotrifluoride, comprising the following steps:

[0038] Step 1: chemical precipitation, add ammonia water to the m-aminotrifluorotoluene liquid, adjust the pH to weakly alkaline, the pH range is 8, add calcium carbonate powder, the amount of calcium carbonate powder added is , and replace the fluorine removal reaction 1.2 times of the stoichiometric amount in the medium, at room temperature, mechanically stirred, the stirring speed was 200r / min, the stirring time was 5h, standing still, the standing time was 1.5h, and precipitation occurred;

[0039] Step 2: Solid-liquid separation. After step 1 is left standing, the supernatant is drawn out, and the solid precipitate is collected by salvage, and the precipitate is recovered; the precipitate is naturally dried, and the recovered precipitate is CaF 2 ;

[0040] Step 3: coagulation and sedimentation, adjust the pH of the supernatant in step 2, adjust the pH value to 8 for...

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PUM

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Abstract

The invention relates to the technical field of chemical engineering, in particular to a method for treating fluorine ions in m-aminotrifluorotoluene, which comprises the following steps of: treating free F-ions in m-aminotrifluorotoluene solution or wastewater by adopting a method of firstly performing chemical sedimentation and then performing coagulating sedimentation; replacing free F <-> ions in the solution into a CaF2 insoluble substance to achieve the purpose of reducing the concentration of the free F <-> ions in the solution; the method can effectively reduce the concentration of free fluorine ions in m-aminotrifluorotoluene, has a good treatment effect on liquid with low fluorine ion concentration, is simple to operate, does not produce pollution, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for treating fluoride ions in m-aminotrifluorotoluene. Background technique [0002] m-aminobenzobenzotrifluoride, also known as m-trifluoromethylaniline, 3-aminobenzotrifluoride, CAS number: 98-16-8, molecular formula: C 7 h 6 f 3 N, flammable, toxic, highly irritating, soluble in ethanol, toluene, benzene and other solvents, decomposes when heated to release toxic aniline, nitrogen oxides and fluoride gases, often used in organic synthesis, raw materials for plastic plasticizer products, Liquid crystal raw materials and intermediates of dyes, as well as intermediates of medicines and pesticides. A series of fluorine-containing drugs can be synthesized using it as a raw material, and compared with traditional medicines, it has lower toxicity and better physiological activity. It is used to synthesize herbicides to prevent broad-leaved weeds and perennial W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C07C209/84C07C211/52C02F101/14C02F101/36C02F103/36
CPCC02F9/00C07C209/84C02F2101/14C02F2101/36C02F2103/36C02F1/66C02F1/5236C02F2001/007C02F1/001C02F1/583C02F2301/08C07C211/52
Inventor 李世煜
Owner 李世煜
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