FR2217070A1 - Cellulose acetate sieve-membrane filters - with smooth, round pore open-ings, made by evapn. of organic solns. contg. metal salts - Google Patents

Cellulose acetate sieve-membrane filters - with smooth, round pore open-ings, made by evapn. of organic solns. contg. metal salts

Info

Publication number
FR2217070A1
FR2217070A1 FR7239937A FR7239937A FR2217070A1 FR 2217070 A1 FR2217070 A1 FR 2217070A1 FR 7239937 A FR7239937 A FR 7239937A FR 7239937 A FR7239937 A FR 7239937A FR 2217070 A1 FR2217070 A1 FR 2217070A1
Authority
FR
France
Prior art keywords
cellulose acetate
evapn
smooth
solns
ings
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
FR7239937A
Other languages
French (fr)
Other versions
FR2217070B1 (en
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.)
Asahi Kasei Corp
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
Asahi Kasei Kogyo KK
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
Application filed by Asahi Chemical Industry Co Ltd, Asahi Kasei Kogyo KK filed Critical Asahi Chemical Industry Co Ltd
Priority to FR7239937A priority Critical patent/FR2217070A1/en
Publication of FR2217070A1 publication Critical patent/FR2217070A1/en
Application granted granted Critical
Publication of FR2217070B1 publication Critical patent/FR2217070B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/70—Assemblies comprising two or more cells
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type
    • C25B9/77—Assemblies comprising two or more cells of the filter-press type having diaphragms

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The membrane filters have smooth, unindented, substantially circular pore openings on both surfaces, the area of the openings being >=3 times as great on one side as the other. Porosity of the membranes is >40% and thickness 50-500 mu. The are made by dissolving cellulose acetate of 20-62.5% acetylation degree in organic solvent, adding a diluent eg. methanol and a salt with metal ion radius 1.33 Angstroms gps I - III, in amt of 20-200 wt.% based on the cellulose acetate and casting on a polished level surface. After evapn of solvent the metal salt is dissolved out. Filters are esp suitable for artificial kidney machines.
FR7239937A 1972-11-10 1972-11-10 Cellulose acetate sieve-membrane filters - with smooth, round pore open-ings, made by evapn. of organic solns. contg. metal salts Granted FR2217070A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7239937A FR2217070A1 (en) 1972-11-10 1972-11-10 Cellulose acetate sieve-membrane filters - with smooth, round pore open-ings, made by evapn. of organic solns. contg. metal salts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7239937A FR2217070A1 (en) 1972-11-10 1972-11-10 Cellulose acetate sieve-membrane filters - with smooth, round pore open-ings, made by evapn. of organic solns. contg. metal salts

Publications (2)

Publication Number Publication Date
FR2217070A1 true FR2217070A1 (en) 1974-09-06
FR2217070B1 FR2217070B1 (en) 1977-08-05

Family

ID=9106980

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7239937A Granted FR2217070A1 (en) 1972-11-10 1972-11-10 Cellulose acetate sieve-membrane filters - with smooth, round pore open-ings, made by evapn. of organic solns. contg. metal salts

Country Status (1)

Country Link
FR (1) FR2217070A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2297672A1 (en) * 1975-01-14 1976-08-13 Rech Tech Et Indles ELECTROLYZER
EP0155695A2 (en) * 1984-03-23 1985-09-25 Hitachi, Ltd. Fuel cell
FR2568412A1 (en) * 1984-07-27 1986-01-31 Occidental Chem Co IMPROVEMENTS IN THE STRUCTURES OF FUEL CELLS.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1585692A (en) * 1968-09-20 1970-01-30
US3507704A (en) * 1967-05-17 1970-04-21 Webb James E Electrolytically regenerative hydrogen-oxygen fuel cell

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507704A (en) * 1967-05-17 1970-04-21 Webb James E Electrolytically regenerative hydrogen-oxygen fuel cell
FR1585692A (en) * 1968-09-20 1970-01-30

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2297672A1 (en) * 1975-01-14 1976-08-13 Rech Tech Et Indles ELECTROLYZER
EP0155695A2 (en) * 1984-03-23 1985-09-25 Hitachi, Ltd. Fuel cell
EP0155695A3 (en) * 1984-03-23 1987-01-14 Hitachi, Ltd. Fuel cell
FR2568412A1 (en) * 1984-07-27 1986-01-31 Occidental Chem Co IMPROVEMENTS IN THE STRUCTURES OF FUEL CELLS.

Also Published As

Publication number Publication date
FR2217070B1 (en) 1977-08-05

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Legal Events

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ST Notification of lapse