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Method for extracting fluorobenzene compounds from fluorobenzene-containing chemical compounds

A compound, the technology of fluorobenzene, which is applied in the field of extraction of fluorine-containing benzene compounds, can solve the problems of less consideration of environmental factors, strong volatility of organic solvents, high toxicity, etc., and achieve improved extraction effect, stable temperature range, and good chemistry. The effect of stability

Inactive Publication Date: 2008-07-23
ZHEJIANG FUSHENG HLDG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the past, the extraction process only focused on the extraction effect of the extractant, and less consideration was given to environmental factors, which led to various problems such as strong volatility, high toxicity, and serious environmental hazards of the organic solvents used.

Method used

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  • Method for extracting fluorobenzene compounds from fluorobenzene-containing chemical compounds
  • Method for extracting fluorobenzene compounds from fluorobenzene-containing chemical compounds

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1 of the present invention: 30 milliliters of wastewater containing fluorobenzene compounds (the content of fluorobenzene compounds is 0.5 mg / mL), 15 mg of 1-methyl-3-propionamidoimidazole hexafluorophosphate, placed in 50 In a ml reaction bottle, product A is obtained, which is a mixture of fluorobenzene compound and 1-methyl-3-propionamidoimidazolium hexafluorophosphate; at 15°C, stir product A on a magnetic stirrer for 30 minutes , to obtain product B, which is a mixture of fluorobenzene compound and 1-methyl-3-propionamidoimidazolium hexafluorophosphate stirred at 15°C; Layered product B; the organic phase of product C is separated from the water phase, and after the fluorobenzene content in the water phase after the extraction is analyzed by gas chromatography, the concentration of fluorobenzene in the organic phase after the extraction is calculated by the subtraction method to be 0.11mg / mL, and the calculated The extraction rate was 22%.

Embodiment 2

[0019] Embodiment 2 of the present invention: 30 milliliters of wastewater containing p-fluorophenol compounds (the content of fluorophenol compounds is 0.5 mg / mL), 30 milligrams of 1-methyl-3-propionamidoimidazole hexafluorophosphate, placed in In a 50 ml reaction bottle, product A was obtained; under the condition of 150°C, product A was stirred on a magnetic stirrer for 1 hour to obtain product B; The organic phase was separated from the aqueous phase, and after the content of p-fluorophenol in the extracted aqueous phase was analyzed by gas chromatography, the concentration of p-fluorophenol in the extracted organic phase was calculated by the subtraction method to be 0.22 mg / mL, and the calculated extraction rate was 44%.

Embodiment 3

[0020] Embodiment 3 of the present invention: 30 milliliters of wastewater containing p-fluorobenzoic acid compounds (the content of fluorobenzoic acid compounds is 0.5 mg / mL), 30 mg of 1-acetamido-3-hexanamido imidazole hexafluorophosphate , placed in a 50ml reaction bottle to obtain product A; under the condition of 50°C, stir product A on a magnetic stirrer for 50 hours to obtain product B; The organic phase of C product is separated from the aqueous phase, and after analyzing the content of p-fluorobenzoic acid in the aqueous phase after the extraction, the concentration of p-fluorobenzoic acid in the organic phase after the extraction is calculated by the subtraction method to be 0.41mg / mL, and the extraction rate is calculated to be 82%.

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Abstract

The invention discloses a method for extracting monofluorobenzene compound from wastewater containing monofluorobenzene compound, which includes the following steps: a. add amide ion liquid and wastewater containing monofluorobenzene compound with the mass ratio of 1:1-10:1 in a reaction vessel and obtain a product A; b. keep the temperature of the product A at the temperature of 0-150 DEG C and stir the product A at the same time to extract for 0.5-50 hours and obtain a product B; c. place the product B stilly for stratification and obtain a product C; d. separate the product C and obtain an organic phase and a water phase, namely, the monofluorobenzene compound is extracted into the organic phase. The invention adopts the amide ion liquid as the extractant to extract the monofluorobenzene compound from wastewater, which mainly improves the extraction effect; the ion liquid can be recycled and is safe and stable; furthermore, the amide ion liquid has no pollution to the environment, which eliminates the defects of previous extraction technologies from the root and changes the whole process into a green environment-friendly technique which is an economic, practical and environment-protective technology.

Description

technical field [0001] The invention relates to a method for extracting fluorine-containing benzene compounds from waste water containing fluorine-containing benzene compounds with amide ionic liquid as an extraction agent. Background technique [0002] In recent years, my country's chemical industry has developed rapidly. Fluorobenzene compounds are a new type of promising organic chemical raw materials, and are also important pharmaceutical and pesticide intermediates, which are used in the synthesis of liquid crystal materials, pharmaceuticals and pesticides. With the rapid development of chemical, pharmaceutical, pesticide, dye and liquid crystal industries and the continuous transformation and innovation of new technology, the demand for this product will increase year by year, and the market prospect is very promising. However, in the process of industrial production of products, the discharged industrial wastewater has brought serious impact and great harm to the envi...

Claims

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Application Information

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IPC IPC(8): C02F1/26C07C17/38B01D11/04
Inventor 裴文陈志明
Owner ZHEJIANG FUSHENG HLDG GROUP
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