DE339977C - Process for the production of ultrafilters - Google Patents

Process for the production of ultrafilters

Info

Publication number
DE339977C
DE339977C DE1919339977D DE339977DD DE339977C DE 339977 C DE339977 C DE 339977C DE 1919339977 D DE1919339977 D DE 1919339977D DE 339977D D DE339977D D DE 339977DD DE 339977 C DE339977 C DE 339977C
Authority
DE
Germany
Prior art keywords
production
ultrafilters
permeable
ultra
collodion
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.)
Expired
Application number
DE1919339977D
Other languages
German (de)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of DE339977C publication Critical patent/DE339977C/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0002—Organic membrane manufacture
    • B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
    • B01D67/0011—Casting solutions therefor
    • B01D67/00113—Pretreatment of the casting solutions, e.g. thermal treatment or ageing

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Paper (AREA)

Description

Verfahren zur Herstellung von Ultrafiltern.Process for the production of ultrafilters.

Es ist bekannt, Ultrafilter dadurch herzustellen, daß man die Tragschicht mit E;oagulationsmittel benetzt, sodann die befeuchtete Tragschicht mit einer kolloiden Lösung der Ultrafiltersubstanz, z. B. Kollodion, präpariert, worauf man gegebenenfalls teilweise abtrocknen läßt und schließlich eine zweite Präparation der Filtersubstan, z mit einer kolloiden Lösung vornimmt, der noch eine endgültige Koagulierung des ganzen Filters mit einem flüssigen Koagulationsmittel zu folgen hat. It is known that ultrafilter can be produced by the supporting layer moistened with an oagulant, then the moistened base layer with a colloidal one Solution of the ultrafilter substance, e.g. B. Kollodion, prepared, whereupon if necessary partially let dry and finally a second preparation of the filter substance, z with a colloidal solution that still has a final coagulation of the must follow the entire filter with a liquid coagulant.

Es wurde nun gefunden, daß für Idie Eigenscllaften des erzeugten Ultrafilters die eingehaltene Temperatur für die Herstellung desselben von größter Bedeutung ist. Während man bei niedriger Temperatur mit hochprozentigen Lösungen von Ultrafiltersubstanz (z. B. Kollodion) arbeiten muß und dabei oft langsam filtrierende Filter und zuweilen sogar Mißerfolge erhält, gelingt es durch Arbeiten bei erhöhter Temperatur, unter Ersparnis an Filtermaterialsuhstanz und mit größter Sicherheit rasch filtrierende Filter herzustellen. Die Höhe der anzuwendenden Temperatur richtet sich nach den besonderen Umständen. Für Kollodionfilter auf Papier sind 35 bis -loO besonders geeignet. It has now been found that the properties of the generated Ultrafilter the maintained temperature for the production of the same of the greatest Meaning is. While at low temperature with high proof solutions of ultrafilter substance (z. B. Kollodion) has to work and often slowly filtering Filters, and sometimes even failures, succeed by working at elevated levels Temperature, with savings in filter material and with the greatest security to manufacture rapidly filtering filters. The level of the temperature to be applied is determined according to the special circumstances. For collodion filters on paper, 35 to -loO particularly suitable.

Aus führungsbeispiel. From an exemplary embodiment.

In einem auf 50 bis 60° gebrachten gläsernen Wärmtrichter liegt ein Papierhütchen, das mit Wasser von 50° angefeuchtet wird. There is a glass warming funnel set to 50 to 60 ° Paper hat that is moistened with water at 50 °.

Hierauf gießt man zweiprozentiges Kollodion ein, nimmt den Glastrichter dann aus dem Wärmer heraus und läßt den Überschuß des Kollodions durch Umkehren ablaufen. Nunmehr gießt man auf 35 bis 40° erwärmtes Kollodion ein und läßt nach kurzer Frist erneut durch Umkehren den Überschuß ablaufen. Nun wird das fertige Filter mit Wasser von Zimmertemperatur gefüllt und ist gebrauchsfertig.Two percent collodion is then poured in and the glass funnel is taken then out of the warmer and reverse the excess collodion expire. Collodion heated to 35 to 40 ° is now poured in and released In a short time again run off the excess by reversing. Now the finished one The filter is filled with water at room temperature and is ready for use.

Claims (1)

PATENT-ANSPRUCH: NTerfahren zur Herstellung von Ultrafiltern, welche aus der Kombination einer nicht ultrafiltrierenden Tragschicht, einer ultraflltrierenden oder nicht ultrafiltrierenden durchlässigen Schwammschicht und einer auf dieser Schwammschicht nur für A-mikronen durchlässigen Haut bestehen, gekennzeichnet durch Anwendung erhöhter Temperatur bei der Herstellung besonders der eigentlichen nur für A-mikronen durchlässigen Filterhaut. PATENT CLAIM: N process for the production of ultrafilters, which from the combination of a non-ultra-filtering base layer, an ultra-filtering one or non-ultrafiltering permeable sponge layer and one on top of it Sponge layer only exist for A-micron permeable skin, characterized by Applying elevated temperature during manufacture especially the actual only for A-micron permeable filter skin.
DE1919339977D 1919-05-24 1919-05-24 Process for the production of ultrafilters Expired DE339977C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE339977T 1919-05-24

Publications (1)

Publication Number Publication Date
DE339977C true DE339977C (en) 1921-08-25

Family

ID=6224214

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1919339977D Expired DE339977C (en) 1919-05-24 1919-05-24 Process for the production of ultrafilters

Country Status (1)

Country Link
DE (1) DE339977C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056512A1 (en) * 1981-01-15 1982-07-28 Brunswick Corporation Reverse osmosis membrane and process for making the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056512A1 (en) * 1981-01-15 1982-07-28 Brunswick Corporation Reverse osmosis membrane and process for making the same

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