IP Library › Granted Patent US 8,414,775
Granted Patent B2
US 8,414,775 · App. 13/406,009 · Granted Apr 9, 2013

Method of using polyvinypolypyrrolidone to remove contaminants from produced water of an oil or gas well

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Quick Facts
Patent No.
US 8,414,775
App. No.
13/406,009
Granted
Apr 9, 2013
Kind
B2
Abstract

A method of removing contaminants from produced water of an oil or gas well comprising the step of contacting the produced water with polyvinylpolypyrrolidone (PVPP) to remove the contaminants from the water.

Claims (7)

1. A method of removing contaminants from produced water of an oil or gas well comprising the step of contacting said produced water with polyvinylpolypyrrolidone (PVPP) to remove said contaminants from said water.

2. The method of claim 1 wherein said contaminant is selected from the group consisting of benzene, xylene, toluene, phenols and polyphenols.

3. The method of claim 1 wherein said PVPP is in the form of a water insoluble powder comprising particles having an average size of about 110 microns.

4. The method of claim 1 wherein said PVPP is in the form of a water insoluble powder comprising particles having an average size of about 25 microns.

5. The method of claim 1 wherein said PVPP is in the form of a water insoluble powder comprising particles having an average size of about 15 microns.

6. The method of claim 1 wherein said PVPP is in the form of particles dispersed in polyvinylpyrrolidone.

7. The method of claim 1 further comprising the step of separating said PVPP from said produced water.

Assignments (4)
RELEASE OF SECURITY INTEREST Recorded Jan 10, 2020
From: THE BANK OF NOVA SCOTIA
To: AVOCA LLC; HERCULES LLC; ISP INVESTMENTS LLC; PHARMACHEM LABORATORIES LLC
Reel/Frame 051557/0504 →
SECURITY AGREEMENT Recorded Jul 3, 2017
From: AVOCA, INC.; HERCULES LLC; ISP INVESTMENTS LLC; PHARMACHEM LABORATORIES, INC.
To: THE BANK OF NOVA SCOTIA, AS ADMINISTRATIVE AGENT
Reel/Frame 043084/0753 →
RELEASE OF PATENT SECURITY AGREEMENT Recorded Mar 18, 2013
From: THE BANK OF NOVA SCOTIA
To: ASHLAND LICENSING AND INTELLECTUAL PROPERTY LLC; AQUALON COMPANY; ISP INVESTMENTS INC.; HERCULES INCORPORATED
Reel/Frame 030025/0320 →
SECURITY AGREEMENT Recorded Apr 4, 2012
From: ISP INVESTMENTS INC.; HERCULES INCORPORATED
To: THE BANK OF NOVA SCOTIA
Reel/Frame 027991/0989 →