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Preparation method of polyether functionalized polymer membrane used for oil extraction sewage treatment

A technology for polymer membranes and oil extraction wastewater, applied in mining wastewater treatment, permeation/dialysis water/sewage treatment, chemical instruments and methods, etc., can solve low permeation flux, poor antigenic oil pollution, and inability to apply oil extraction wastewater treatment, etc. question

Active Publication Date: 2021-08-20
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyvinylidene fluoride (PVDF), polypropylene (PP) or polytetrafluoroethylene (PTFE) is used as the base film material to blend with styrene-maleic anhydride copolymer (SMA) to prepare the casting film, and the non-solvent The PVDF / SMA ultrafiltration membrane is prepared by the conversion method, and the hyperbranched polyether demulsifier is grafted to the polymer membrane by using the chemical reaction between the anhydride of the membrane and the terminal hydroxyl group of the hyperbranched polyether demulsifier, which can realize efficient oil-water separation , but because the demulsifier and the base film are bonded by ester groups, it cannot be applied to the treatment of alkaline oil recovery wastewater
In addition, low permeation flux and poor antigenic oil contamination are the bottlenecks of current membrane separation technology in the industrial treatment of oily wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) Dissolve 10g of polyetheramine D230 in 10g of N,N-dimethylformamide, and dissolve 5g of chloromethylated polysulfone (10% degree of chloromethyl substitution) in 15g of N,N-dimethylformamide Formamide; slowly drop the chloromethylated polysulfone solution into the D230 solution, and stir and react at 60°C for 10h;

[0013] (2) After the reaction is completed, pour the reaction solution into ethanol to precipitate the polymer, and wash the precipitated polymer with ethanol several times to remove unreacted raw materials, and obtain D230 grafted polysulfone polymer, referred to as D230-g-PSf;

[0014] (3) Dissolve 6g of D230-g-PSf polymer and 4g of porogen PEG2000 in 40g of N,N-dimethylformamide at 70°C to form a casting solution, pour it on a glass plate after defoaming Scrape up to form a liquid film, and then transfer it to a coagulation bath to prepare a D230-g-PSf porous film by a non-solvent-induced phase inversion method;

[0015] (4) D230-g-PSf porous membra...

Embodiment 2

[0017] (1) Dissolve 10g of polyetheramine CAED900 in 10g of N,N-dimethylformamide, and dissolve 5g of chloromethylated polyethersulfone (chloromethyl substitution degree 15%) in 15g of N,N-dimethylformamide Base formamide; slowly drop the chloromethylated polyethersulfone solution into the CAED900 solution, and stir and react at 60°C for 10h;

[0018] (2) After the reaction is completed, pour the reaction liquid into ethanol to precipitate the polymer, and wash the precipitated polymer with ethanol several times to remove unreacted raw materials, and then obtain CAED900 grafted polyethersulfone polymer, referred to as For CAED900-g-PES;

[0019] (3) Dissolve 6g of CAED900-g-PES polymer and 4g of porogen PEG2000 in 40g of N,N-dimethylformamide at 70°C to form a casting solution, and pour it on a glass plate after defoaming Scrape up to form a liquid film, and then transfer it to a coagulation bath to prepare a CAED900-g-PES porous film by a non-solvent-induced phase inversion ...

Embodiment 3

[0022] (1) Dissolve 10g of polyetheramine T403 in 10g of N,N-dimethylformamide, and dissolve 5g of chloromethylated polyetheretherketone (chloromethyl substitution degree 20%) in 15g of N,N-dimethylformamide Methylformamide; slowly drop the chloromethylated polyetheretherketone solution into the T403 solution, and stir and react at 60°C for 10h;

[0023] (2) After the reaction is completed, pour the reaction solution into ethanol to precipitate the polymer, and wash the precipitated polymer with ethanol several times to remove unreacted raw materials to obtain T403 grafted polyether ether ketone polymer, Abbreviated as T403-g-PEEK;

[0024] (3) Dissolve 6g of T403-g-PEEK polymer and 4g of porogen PVP3000 in 40g of N,N-dimethylformamide at 70°C, prepare a casting solution, and pour it on a glass plate after defoaming Scrape up to form a liquid film, and then transfer it to a coagulation bath to prepare a T403-g-PEEK porous film by a non-solvent-induced phase inversion method; ...

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Abstract

The invention provides a preparation method of a polyether functionalized polymer membrane for oil extraction sewage treatment. Specifically, the preparation method comprises the steps that firstly, amine-terminated polyether is grafted to a chloromethyl polysulfone, chloromethyl polyether sulfone or chloromethyl poly(ether-ether-ketone) high-molecular polymer through a nucleophilic substitution reaction, and then the amine-terminated polyether grafted high-molecular polymer membrane is prepared by adopting a non-solvent induced phase inversion method. The surface and the pore walls of the membrane have polyether groups, so the membrane shows good hydrophilicity and underwater super-oleophobic property, and polyether on the surface of the membrane has a demulsification function, so the membrane can be used for demulsification and oil-water separation of oil extraction sewage.

Description

technical field [0001] The invention belongs to the technical field of functional polymer membrane separation, and in particular relates to a preparation method of a polyether functionalized polymer membrane used for oil extraction sewage treatment. Background technique [0002] With the rapid development of petrochemical, pharmaceutical, metallurgy, and food processing industries, a large amount of oily sewage is produced, which poses a huge challenge to human life and the natural environment. Among them, the water content of oil production fluid in my country is getting higher and higher, and the water content of some oilfield production fluid exceeds 95%, which brings great challenges to the treatment of oil production wastewater and even affects the normal production of oil fields. [0003] Due to the high salinity of oil production wastewater, it usually contains active agents, polymers and other oil displacement agents, as well as a certain concentration of crude oil, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/52B01D67/00C02F1/40C02F1/44C02F103/10
CPCB01D71/52B01D67/0006C02F1/40C02F1/44C02F2103/10B01D2325/36
Inventor 严峰张萌萌王明霞方舟李丽莎李元晶王峥
Owner TIANJIN POLYTECHNIC UNIV