CA2163480A1 - Nanofiltration of Concentrated Aqueous Salt Solutions - Google Patents

Nanofiltration of Concentrated Aqueous Salt Solutions

Info

Publication number
CA2163480A1
CA2163480A1 CA2163480A CA2163480A CA2163480A1 CA 2163480 A1 CA2163480 A1 CA 2163480A1 CA 2163480 A CA2163480 A CA 2163480A CA 2163480 A CA2163480 A CA 2163480A CA 2163480 A1 CA2163480 A1 CA 2163480A1
Authority
CA
Canada
Prior art keywords
sodium
concentration
nanofiltration
ions
favourably
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2163480A
Other languages
French (fr)
Other versions
CA2163480C (en
Inventor
Zbigniew Twardowski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aker Solutions Canada Inc
Original Assignee
Chemetics International Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23677016&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2163480(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Chemetics International Co Ltd filed Critical Chemetics International Co Ltd
Publication of CA2163480A1 publication Critical patent/CA2163480A1/en
Application granted granted Critical
Publication of CA2163480C publication Critical patent/CA2163480C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/027—Nanofiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/025—Reverse osmosis; Hyperfiltration
    • B01D61/026—Reverse osmosis; Hyperfiltration comprising multiple reverse osmosis steps
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D3/00—Halides of sodium, potassium or alkali metals in general
    • C01D3/14—Purification
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2317/00—Membrane module arrangements within a plant or an apparatus
    • B01D2317/02—Elements in series
    • B01D2317/022—Reject series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Nanotechnology (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

A nanofiltration process using a conventional nanofiltration membrane module under a positive applied pressure is used to selectively change the concentration of one solute, such as sodium chloride or sodium chlorate providing monovalent ions, from another solute such as sodium sulfate or sodium dichromate providing multivalent ions in high salt aqueous concentrations. The process is particularly useful in favourably lowering the concentration of silica and dichromate ions in chloral kali and chlorate brine containing solutions and favourably raising the sodium sulphate level relative to sodium chloride in chloraldhali liquor. The relatively high salt concentration, surprisingly, effects little or no monovalent, particularly, Cl rejection.
CA002163480A 1995-04-17 1995-11-22 Nanofiltration of concentrated aqueous salt solutions Expired - Lifetime CA2163480C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/422,935 1995-04-17
US08/422,935 US5587083A (en) 1995-04-17 1995-04-17 Nanofiltration of concentrated aqueous salt solutions

Publications (2)

Publication Number Publication Date
CA2163480A1 true CA2163480A1 (en) 1996-10-18
CA2163480C CA2163480C (en) 1999-11-16

Family

ID=23677016

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002163480A Expired - Lifetime CA2163480C (en) 1995-04-17 1995-11-22 Nanofiltration of concentrated aqueous salt solutions

Country Status (13)

Country Link
US (2) US5587083A (en)
EP (1) EP0821615B2 (en)
JP (1) JP3256545B2 (en)
KR (1) KR100385465B1 (en)
CN (1) CN1111081C (en)
AU (1) AU691415B2 (en)
BR (1) BR9608054A (en)
CA (1) CA2163480C (en)
DE (1) DE69614516T3 (en)
NZ (1) NZ304801A (en)
TW (1) TW343157B (en)
WO (1) WO1996033005A1 (en)
ZA (1) ZA962807B (en)

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Also Published As

Publication number Publication date
US5587083A (en) 1996-12-24
WO1996033005A1 (en) 1996-10-24
ZA962807B (en) 1996-10-11
AU691415B2 (en) 1998-05-14
DE69614516D1 (en) 2001-09-20
EP0821615B2 (en) 2006-04-26
BR9608054A (en) 1999-11-30
EP0821615A1 (en) 1998-02-04
EP0821615B1 (en) 2001-08-16
NZ304801A (en) 1998-12-23
TW343157B (en) 1998-10-21
AU5267096A (en) 1996-11-07
DE69614516T3 (en) 2006-11-30
CN1180322A (en) 1998-04-29
DE69614516T2 (en) 2002-05-08
KR19990007852A (en) 1999-01-25
CA2163480C (en) 1999-11-16
CN1111081C (en) 2003-06-11
US5858240A (en) 1999-01-12
JP3256545B2 (en) 2002-02-12
KR100385465B1 (en) 2003-08-19
JPH11504564A (en) 1999-04-27

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