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A preparation method of adsorption material for extracting perfluorooctanoic acid

A technology of perfluorooctanoic acid and adsorption material, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of high total cost of recovering perfluorooctanoic acid, low absorption efficiency, etc., and achieve the effects of enhanced binding force, high adsorption efficiency, and expanded application range.

Active Publication Date: 2018-05-11
JUHUA GROUP TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used ion exchange resins used in the recovery of perfluorooctanoic acid industry are polystyrene-based anion-exchange resins and polyacrylic acid-based anion-exchange resins. However, the actual adsorption capacity of ion-exchange resins currently used is still low, and the resins are very difficult during use. It is easy to reach the saturated adsorption capacity, requires repeated regeneration and frequent renewal, and the absorption efficiency is low, resulting in a high total cost of recovering PFOA

Method used

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  • A preparation method of adsorption material for extracting perfluorooctanoic acid
  • A preparation method of adsorption material for extracting perfluorooctanoic acid
  • A preparation method of adsorption material for extracting perfluorooctanoic acid

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Embodiment 1

[0033] A method for preparing an adsorption material for extracting perfluorooctanoic acid, comprising the following steps:

[0034] Step (1) preparation of aqueous phase

[0035] Add 100 parts of pure water and 1.5 parts of gelatin into a 200L reaction kettle according to 1 kg per part, stir evenly to obtain an aqueous phase solution, and set aside.

[0036] Step (2) preparation of oil phase

[0037] According to each 1kg, the oil phase components in the following proportions were mixed in a 500L closed reaction kettle, and stirred evenly to obtain the oil phase, which was set aside.

[0038]

[0039]

[0040] Step (3) suspension polymerization reaction

[0041] Take 101.5Kg of the aqueous phase solution obtained in step (1) and 142.5Kg of the oil phase obtained in step (2) and put them into a closed reaction kettle, react at 90°C for 15h, discharge after the reaction, wash the microspheres with water until the water is clear, Get the product white ball.

[0042] St...

Embodiment 2

[0047] A method for preparing an adsorption material for extracting perfluorooctanoic acid, comprising the following steps:

[0048] Step (1) preparation of aqueous phase

[0049] Add 100 parts of pure water and 2 parts of hydroxymethyl cellulose into a 200L reaction kettle according to 1 kg per part, stir evenly to obtain an aqueous phase solution, and set aside.

[0050] Step (2) preparation of oil phase

[0051] According to each 1kg, the oil phase components in the following proportions were mixed in a 500L closed reaction kettle, and stirred evenly to obtain the oil phase, which was set aside.

[0052]

[0053] Step (3) suspension polymerization reaction

[0054] Take 102Kg of the aqueous phase solution obtained in step (1) and 145Kg of the oil phase obtained in step (2) and put them into a closed reaction kettle, react at 110°C for 10 hours, discharge after the reaction, wash the microspheres until the water is clear, and obtain the product White ball. Step (4) ch...

Embodiment 3

[0059] A method for preparing an adsorption material for extracting perfluorooctanoic acid, comprising the following steps:

[0060] Step (1) preparation of aqueous phase

[0061] Add 100 parts of pure water and 0.5 parts of polyvinyl alcohol into a 200L reaction kettle according to 1 kg per part, stir evenly to obtain an aqueous phase solution, and set aside.

[0062] Step (2) preparation of oil phase

[0063] According to each 1kg, the oil phase components in the following proportions were mixed in a 500L closed reaction kettle, and stirred evenly to obtain the oil phase, which was set aside.

[0064]

[0065] Step (3) suspension polymerization reaction

[0066] Take 100.5Kg of the aqueous phase solution obtained in step (1) and 146.2Kg of the oil phase obtained in step (2) into a closed reaction kettle, react at 70°C for 20h, discharge after the reaction, wash the microspheres with water until the water is clear, Get the product white ball.

[0067] Step (4) chlorometh...

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Abstract

The invention discloses a preparation method of an adsorbing material for extracting perfluorooctanoic acid. The preparation method of the adsorbing material for extracting the perfluorooctanoic acid comprises the following steps of (1): preparing a water phase; (2), preparing an oil phase; (3), carrying out a suspension polymerization reaction; (4), carrying out a chloromethylation reaction; (5), carrying out an amination reaction. The preparation method of the adsorbing material for extracting the perfluorooctanoic acid has the advantages that a product is high in adsorptive capacity and long in service life.

Description

technical field [0001] The invention relates to a preparation method of an adsorption material, in particular to a preparation method of an adsorption material for extracting perfluorooctanoic acid. Background technique [0002] PFOA is an expensive compound with low surface tension. It is often used as a dispersant in the polymerization of tetrafluoroethylene (TFE) and in the production of 1# and 2# fluororubbers. Fluorinated surfactants have broad market application prospects. Since perfluorooctanoic acid is obtained by electrolysis of fluorine-containing compounds or polytetrafluoroethylene, its price is very expensive, so its cost accounts for a relatively large proportion of the production cost of polytetrafluoroethylene (PTFE). The wastewater discharged from the production of dispersed PTFE resins contains low-concentration perfluorooctanoic acid ammonium salt, which is a biochemical non-degradable compound. If it is discharged at this point, it will not only pollute...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F216/14C08F220/40C08F224/00C08F8/32C08F8/24B01J20/26B01J20/30
CPCB01J20/261C08F8/32C08F8/24C08F212/08C08F216/1408C08F220/40C08F224/00
Inventor 王金明
Owner JUHUA GROUP TECH CENT
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