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Method for removing ferric trichloride from chlorination reaction liquid with styrene type macroporous anion exchange resin

A chlorination reaction, styrene-based technology, applied in chemical instruments and methods, organic chemistry, halogenated hydrocarbon preparation, etc., can solve problems such as large workload and difficult separation of water, and achieve low extraction cost, high removal efficiency, Achieve the effect of automation

Active Publication Date: 2013-04-24
SUNRESIN NEW METERIALS CO LTD XIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems in the current technology, the present invention provides a method for removing ferric chloride in the chlorination reaction solution by using styrene-type macroporous anion exchange resin, which overcomes the technical defects of the traditional method such as large workload and difficult separation of water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment one: high concentration chlorobenzene reaction solution

[0021] A manufacturer produces chlorobenzene, FeCl in the chlorobenzene reaction solution 3 The content is about 500ppm, and the suspended impurities in the chlorobenzene reaction liquid are removed by filtration. In a glass resin column with a diameter of 35 mm and a height of 400 mm, 100 ml of LSI-396 styrene type macroporous strong base anion exchange resin produced by Xi'an Lanxiao Technology New Materials Co., Ltd. was loaded. The chlorobenzene reaction solution after filtering out impurities was passed through the resin column at a flow rate of 10 ml / h, and a total of 103 L of the chlorobenzene reaction solution passed through. Instantaneous sampling of treated chlorobenzene reaction liquid and detection of FeCl by atomic absorption spectrophotometry 3 The content is lower than 10ppm (up to 9.2ppm). The saturated resin is desorbed with 0.01% hydrochloric acid solution, the desorption flow rate...

Embodiment 2

[0022] Embodiment two: high concentration chlorobenzene reaction solution

[0023] A manufacturer produces chlorobenzene, FeCl in the chlorobenzene reaction solution 3 The content is about 500ppm, and the suspended impurities in the chlorobenzene reaction liquid are removed by filtration. In a glass resin column with a diameter of 35 mm and a height of 400 mm, 100 ml of commercially available D201 styrene type macroporous strong base anion exchange resin was packed. The chlorobenzene reaction solution from which impurities were filtered out was passed through the resin column at a flow rate of 10 ml / h, and a total of 73 L of the chlorobenzene reaction solution passed through. Instantaneous sampling of treated chlorobenzene reaction liquid and detection of FeCl by atomic absorption spectrophotometry 3 The content is lower than 10ppm (up to 9.7ppm). The saturated resin is desorbed with 0.01% hydrochloric acid solution, the desorption flow rate is 0.05BV / h, and the dosage is 1...

Embodiment 3

[0024] Embodiment three: high concentration chlorobenzene reaction solution

[0025] A manufacturer produces chlorobenzene, FeCl in the chlorobenzene reaction solution 3 The content is about 500ppm, and the suspended impurities in the chlorobenzene reaction liquid are removed by filtration. In a glass resin column with a diameter of 35 mm and a height of 400 mm, 100 ml of LSI-296 styrene type macroporous weak base anion exchange resin produced by Xi'an Lanxiao Technology New Materials Co., Ltd. was loaded. The chlorobenzene reaction solution from which impurities were filtered out was passed through the resin column at a flow rate of 10 ml / h, and a total of 63 L of the chlorobenzene reaction solution passed through. Instantaneous sampling of treated chlorobenzene reaction liquid and detection of FeCl by atomic absorption spectrophotometry 3 The content is lower than 10ppm (up to 9.9ppm). The saturated resin is desorbed with 0.01% hydrochloric acid solution, the desorption f...

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Abstract

The invention provides a method for removing ferric trichloride from chlorination reaction liquid with styrene type macroporous anion exchange resin, the method includes the following steps: (a) filtering the chlorination reaction liquid and removing suspended impurities and tar in the chlorination reaction liquid; (b) absorbing the ferric trichloride in the filtered chlorination reaction liquid with the styrene type macroporous anion exchange resin; (c) desorbing the styrene type macroporous anion exchange resin which reaches saturated in absorption with a desorption reagent to obtain desorption solution; and (d) the fully desorbed styrene type macroporous anion exchange resin entering into absorption in the next period, and using the ferric trichloride after water evaporation in the desorption solution as flocculant for water treatment engineering. The technical defects that a traditional method is large in workload, and the water is difficult to separate are overcome, the removal method of the ferric trichloride in the chlorination reaction liquid with the styrene type macroporous anion exchange resin is good in quality, small in water consumption, high in removal efficiency, low in cost and more suitable for large-scale production, and automated operation is easier to achieve.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and environmental protection, and relates to a method for separating inorganic salts from organically synthesized chemical mother liquors, in particular to a method for removing ferric chloride in chlorination reaction liquids by using styrene-type macroporous anion exchange resins. Background technique [0002] Ferric chloride is a compound that is easily soluble in water. In the production process of the chlorination reaction (such as the production of chlorobenzene and dichlorobenzene), since benzene contains a certain amount of water (ppm level), the concentration of chlorine gas generated during the chlorination reaction is relatively high and the corrosion is relatively high. Strong acid causes equipment corrosion, and the ferric chloride produced can easily enter the reaction solution, resulting in poor quality of the chlorinated solution. Nowadays, water washing and alkali wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C17/389C07C25/06C07C25/08C07C25/02
Inventor 郭福民李益博刘琼王程吴忠峰智彩辉寇晓康
Owner SUNRESIN NEW METERIALS CO LTD XIAN
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