Method for treating oil-containing aqueous mixtures with cation exchange resin

Patent metadata

Field	Value
Publication number	US-9926211-B2
Application number	US-201414906623-A
Country	US
Kind code	B2
Filing date	Jul 8, 2014
Priority date	Aug 6, 2013
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A method for treating an oil-containing aqueous mixture comprising the step of passing the mixture ( 1 ) through a media ( 6 ) comprising a bead-form cation exchange resin combined with a cationic surfactant, wherein the resin includes a sulfonated crosslinked copolymer matrix having a rough surface characterized by having a frequency of at least 5 peaks and valleys per sample surface area (283 um×212 um), where the difference between the average height of the 5 highest peaks and the 5 lowest valleys is at least 6 μm.

First claim

The invention claimed is:

1. A method for treating an oil-containing aqueous mixture comprising the step of passing the mixture through a media comprising a bead-form cation exchange resin combined with a cationic surfactant, wherein the resin comprises a sulfonated crosslinked copolymer matrix having a rough surface characterized by comprising a frequency of at least 5 peaks and valleys per sample surface area (283 um×212 um), where the difference between the average height of the 5 highest peaks and the 5 lowest valleys is at least 6 μm.

2. The method of claim 1 wherein the surface of the resin in characterized by comprising a frequency of at least 10 peaks and valleys per sample surface area (283 um×212 um).

3. The method of claim 1 wherein the cation exchange resin has a surface area ratio of from 0.9% to 2.4%.

4. The method of claim 1 wherein the resin is a gel-type.

5. The method of claim 1 wherein the crosslinked copolymer matrix is derived from polymerizing a monomer mixture comprising styrene or divinylbenzene.

6. The method of claim 1 wherein the cationic surfactant comprises a functional group selected from at least one of the following: i) an amine and ii) a quaternary ammonium iii) pyridinium, iv) quinoline, v) bis-quarternary ammonium, vi) sulfonium, vii) phosphonium and viii) arsonium.

7. The method of claim 1 wherein the cationic surfactant is represented by the formula:

wherein X is selected from a halogen and R 1 , R 2 , R 3 and R 4 are independently selected from hydrogen and hydrocarbyls having from 1 to 20 carbon atoms with the proviso that at least one of R 1 , R 2 , R 3 and R 4 is a hydrocarbyl.

8. The method of claim 1 wherein the resin comprises a sulfonated crosslinked copolymer matrix having a rough surface characterized by comprising a frequency of at least 5 peaks and valleys per sample surface area (283 um×212 um), where the difference between the average height of the 5 highest peaks and the 5 lowest valleys is at least 8 μm.

9. The method of claim 1 wherein the resin comprises a sulfonated crosslinked copolymer matrix having a rough surface characterized by comprising a frequency of at least 5 peaks and valleys per sample surface area (283 um×212 um), where the difference between the average height of the 5 highest peaks and the 5 lowest valleys is at least 10 μm.

Assignees

• Rohm & Haas
• Dow Global Technologies Llc

Inventors

• Liu Gongyan
• Wang Xianrui
• Yan Zhaohui
• Yang Liu
• Zhang Zheng
• Zhou Jianbo

Classifications

• B01D17/045

  with coalescers · CPC title

• C02F1/42 Primary

  by ion-exchange (ion-exchange in general B01J) · CPC title

• B01J39/04

  Processes using organic exchangers · CPC title

• C02F2305/04

  Surfactants, used as part of a formulation or alone · CPC title

• C02F2101/32

  Hydrocarbons, e.g. oil · CPC title