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1. WO2022115429 - WATER TREATMENT

Publication Number WO/2022/115429
Publication Date 02.06.2022
International Application No. PCT/US2021/060517
International Filing Date 23.11.2021
IPC
C02F 1/42 2006.1
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
42by ion-exchange
B01J 47/02 2017.1
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
47Ion-exchange processes in general; Apparatus therefor
02Column or bed processes
C02F 101/14 2006.1
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
101Nature of the contaminant
10Inorganic compounds
12Halogens or halogen-containing compounds
14Fluorine or fluorine-containing compounds
B01J 41/14 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
41Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
08Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
12Macromolecular compounds
14obtained by reactions only involving unsaturated carbon-to-carbon bonds
CPC
B01J 41/05
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
41Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
04Processes using organic exchangers
05in the strongly basic form
B01J 41/14
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
41Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
08Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
12Macromolecular compounds
14obtained by reactions only involving unsaturated carbon-to-carbon bonds
B01J 47/026
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
47Ion-exchange processes in general; Apparatus therefor
02Column or bed processes
026using columns or beds of different ion exchange materials in series
C02F 1/42
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
42by ion-exchange
C02F 2001/422
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
42by ion-exchange
422using anionic exchangers
C02F 2101/14
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
2101Nature of the contaminant
10Inorganic compounds
12Halogens or halogen-containing compounds
14Fluorine or fluorine-containing compounds
Applicants
  • PUROLITE CORPORATION [US]/[US]
Inventors
  • BOODOO, Francis
Agents
  • SULLIVAN, JR., Robert, C.
  • LUDWIG, S. Peter
Priority Data
63/118,27925.11.2020US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) WATER TREATMENT
(FR) TRAITEMENT DES EAUX
Abstract
(EN) Disclosed is a method for controlling the amount of leakage of per- and polyfluoroalkyl substances (PFAS) or other contaminants from resin beds during water purification processes that employ multiple vessels or banks of PFAS ad/ab-sorbing material such as ion exchange resins. The method comprises: providing at least two vessels (or at least two banks of vessels), each vessel containing a resin bed; and simultaneously passing the water source through the vessels in parallel. At start up and for a pre-determined period of time, the specific flow rates for passing the water source through the resin beds in the vessels (or banks of vessels) differ by at least 5%, preferably by at least 10%, more preferably at least 15%, and/or the volumes of resin beds in the vessels differ by at least 5%, preferably at least 10%, more preferably at least 15%.
(FR) L'invention concerne un procédé permettant de réguler la quantité de fuites de substances perfluoroalkylées (PFAS) ou d'autres contaminants provenant de lits de résine au cours de procédés d'épuration d'eau qui font appel à de multiples cuves ou bancs de matériaux absorbant les substances perfluoroalkylées telles que les résines échangeuses d'ions. Le procédé comprend : la fourniture d'au moins deux cuves (ou d'au moins deux bancs de cuves), chaque récipient contenant un lit de résine ; et le passage simultané de la source d'eau à travers les cuves en parallèle. Au démarrage et pendant une période prédéterminée, les débits précis pour le passage de la source d'eau à travers les lits de résine dans les cuves (ou bancs de cuves) diffèrent d'au moins 5 %, de préférence d'au moins 10 %, plus préférablement d'au moins 15 %, et/ou les volumes des lits de résine dans les cuves diffèrent d'au moins 5 %, de préférence d'au moins 10 %, plus préférablement d'au moins 15 %.
Latest bibliographic data on file with the International Bureau