Invention Grant
- Patent Title: Spiral wound membrane element for high temperature filtration
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Application No.: US16961906Application Date: 2019-02-08
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Publication No.: US11607649B2Publication Date: 2023-03-21
- Inventor: Paul Michael Smigelski, Jr. , David Olson , Rachel Gettings , Jack Howson , David Moore , Deborah De La Cruz , Hua Wang , Joel Caraher
- Applicant: BL TECHNOLOGIES, INC.
- Applicant Address: US MN Minnetonka
- Assignee: BL TECHNOLOGIES, INC.
- Current Assignee: BL TECHNOLOGIES, INC.
- Current Assignee Address: US MN Minnetonka
- International Application: PCT/US2019/017271 WO 20190208
- International Announcement: WO2019/157322 WO 20190815
- Main IPC: B01D61/02
- IPC: B01D61/02 ; B01D63/10 ; B01D69/10 ; B01D69/12 ; B01D71/56

Abstract:
A spiral wound membrane module is suitable for use with high temperature water that may also have a high pH, for example steam injection produced water. The module uses a membrane with a polyphenylene sulfide (PPS) backing material. The feed spacer of the module may be made from polyphenylene sulfide (PPS) or ethylene chlorotrifluoroethylene (ECTFE). The permeate carrier may be made of a woven nylon (i.e. nylon 6, 6) fabric coated with high temperature epoxy. The core tube and anti-telescoping device may be made of polysulfone. In some examples, the module may be used at a temperature of up to 130° C. Optionally, the module may be used at a pH of 9.5 or more. In a filtration method, the module may be operated at a pressure in the range of 150 to 450 psi. The module may be operated at a generally constant pressure.
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