DE1696259C3 - - Google Patents
Info
- Publication number
- DE1696259C3 DE1696259C3 DE1696259A DE1696259A DE1696259C3 DE 1696259 C3 DE1696259 C3 DE 1696259C3 DE 1696259 A DE1696259 A DE 1696259A DE 1696259 A DE1696259 A DE 1696259A DE 1696259 C3 DE1696259 C3 DE 1696259C3
- Authority
- DE
- Germany
- Prior art keywords
- asbestos
- fibers
- solutions
- membranes
- asbestos fibers
- 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
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
- C25B13/00—Diaphragms; Spacing elements
- C25B13/04—Diaphragms; Spacing elements characterised by the material
- C25B13/05—Diaphragms; Spacing elements characterised by the material based on inorganic materials
- C25B13/06—Diaphragms; Spacing elements characterised by the material based on inorganic materials based on asbestos
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/40—Asbestos
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0289—Means for holding the electrolyte
- H01M8/0293—Matrices for immobilising electrolyte solutions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Electrochemistry (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Metallurgy (AREA)
- Fuel Cell (AREA)
Description
peraturen zwischen 450 und 5500C und einer Behandlungsdauer von 15 bis 60 Minuten noch biegsame und in 30"/qiger KOH schwach quellende Papiere herstellen. Bei entsprechender Wahl der Behandlungsdauer kann jedoch auch noch bei Temperaturen von 300 und 700° C getempert werden.temperatures between 450 and 550 0 C and a treatment time of 15 to 60 minutes more flexible and produce low swelling in 30 "/ qiger KOH papers. With an appropriate choice of the duration of treatment, however, may be annealed even at temperatures of 300 and 700 ° C.
An Hand des nachstehenden Beispiels soll die Erfindung noch näher erläutert werden.The invention is to be explained in more detail using the example below.
Rhodesischer Asbest T 38 wurde zunächst in einem Windsichter ohne Zugluft zerrissen und anschließend zweimal mit 15 ms/h Zugluft gesichtet. 15 g des so gesichteten Asbestes wurden dann in 750 ml Wasser suspendiert und drei Minuten in einem Mixer behandelt. Die Behandlung im Mixer ist deshalb erforderlich, weil das gemäß diesem Ausführungsbeispiel hergestellte Asbestpapier als Gassperre zwischen Elektrolyt- und Gasraum in Brennstoffelementen eingesetzt werden soll; wie sich nämlich gezeigt hat, lassen sich gasdichte Papiere nur mit Asbestfasern bestimmter Länge erreichen.Rhodesian asbestos T 38 was first torn up in an air sifter without drafts and then sighted twice with 15 m s / h drafts. 15 g of the asbestos thus sighted were then suspended in 750 ml of water and treated in a mixer for three minutes. The treatment in the mixer is necessary because the asbestos paper produced according to this embodiment is to be used as a gas barrier between the electrolyte and gas space in fuel elements; As has been shown, gas-tight papers can only be achieved with asbestos fibers of a certain length.
Der so aufbereitete Asbest wurde über einen Zeitraum von 4 Tagen mit 6 η KOH bei 90° C ausgelaugt und anschließend mit destilliertem Wasser so lange gewaschen, bis der pH-Wert der Asbestmasse etwa 9 betrug. Aus der Asbestmasse wurde auf einem Blattbildner ein 375 cm2 großes Asbestpapier hergestellt und dieses wurde dann eine Stunde lang bei 450° C getempert. Wie die Druckprüfung gezeigt hat, sind derart hergestellte Asbestpapiere, die eine Flächendichte von 40 mg/cms haben, bis über 20 N/cm8 (1 atü) gasdicht und mechanisch sehr stabil.The asbestos prepared in this way was leached with 6 η KOH at 90 ° C. over a period of 4 days and then washed with distilled water until the pH value of the asbestos mass was about 9. A 375 cm 2 asbestos paper was produced from the asbestos mass on a sheet former and this was then tempered at 450 ° C. for one hour. As the pressure test has shown, asbestos papers produced in this way, which have a surface density of 40 mg / cm s , are gas-tight up to over 20 N / cm 8 (1 atm.) And are mechanically very stable.
ίο Die Gasdichtigkeit der Asbestmembranen war auch nach 5000 Stunden Betriebszeit in Brennstoffelementen bei einer Temperatur von 70° C und 6 η KOH als Elektrolytflüssigkeit noch vorhanden. Eine Zerfaserung der Membranen trat unter den oben-ίο The gas tightness of the asbestos membranes was even after 5000 hours of operation in fuel elements at a temperature of 70 ° C and 6 η KOH still present as electrolyte liquid. A fraying of the membranes occurred under the above
is genannten Betriebsbedingungen nicht ein.is not mentioned operating conditions.
Die gleichen Ergebnisse wurden mit Asbestmembranen mit einer Flächendichte von 20 mg/cm2 erreicht.
Die Verwendung der neuen Asbestmembranen istThe same results were achieved with asbestos membranes with an areal density of 20 mg / cm 2 .
The use of the new asbestos membrane is on
ao nicht auf Brennstoffelemente beschränkt. Beispielsweise können sie auch als Diaphragmen in Elektrolyseuren und Akkumulatoren eingesetzt werden.ao not limited to fuel elements. For example they can also be used as diaphragms in electrolysers and accumulators.
Claims (5)
wendeten Bindemittel bestimmt. Völlig reine Asbestfasern müssen jedoch vor derThe production of asbestos discs, asbestos paper, for example 6 η KOH, can be obtained. The fore and asbestos membranes are usually done in 40 part of this cleaning process is that the way that asbestos fibers and the resulting alkaline treatment is an aqueous suspension, separated pretreatment with alkali or alkaline earth binding agent is allowed to attach to the fibers and makes hydroxide solutions superfluous. In this case, the water required from the slurry formed in this way is then separated again from the adhering lye before the tempering. The properties of the asbestos fibers are not completely washed out of the asbestos present after drying and pressing. The pH value of the washing liquor must not drop below 8, but not be greater than 13,
applied binders determined. However, completely pure asbestos fibers must be used before
menDorosität erreicht weiden. Wie Versuche gezeigt haben, lassen sich bei Tem-From the German patent Λ < 596 241 it is and the treatment time becomes longer. Known as asbestos membranes in fuel elements, the asbestos paper is becoming more and more brittle and is showing the need to use those in which the plastic used as binding water only has a very low swelling capacity, only a fraction or none at all. Accordingly, you will be each used so far, namely 0.5 to 6 6 * Weil temperature and time to the desired percent by weight, based on the weight of the asbestos properties of the asbestos discs, papers and stes. In this way, a sufficient volume of membranes can be deposited.
menDorosity reaches willow. As tests have shown, at tem-
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19511696259 DE1696259A1 (en) | 1951-01-28 | 1951-01-28 | Process for the production of porous, binder-free asbestos disks, in particular asbestos membranes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19511696259 DE1696259A1 (en) | 1951-01-28 | 1951-01-28 | Process for the production of porous, binder-free asbestos disks, in particular asbestos membranes |
DES0108908 | 1967-03-18 |
Publications (3)
Publication Number | Publication Date |
---|---|
DE1696259A1 DE1696259A1 (en) | 1971-11-18 |
DE1696259B2 DE1696259B2 (en) | 1974-04-25 |
DE1696259C3 true DE1696259C3 (en) | 1974-11-28 |
Family
ID=25754613
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19511696259 Granted DE1696259A1 (en) | 1951-01-28 | 1951-01-28 | Process for the production of porous, binder-free asbestos disks, in particular asbestos membranes |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1696259A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO144358C (en) * | 1973-10-03 | 1981-08-19 | Ppg Industries Inc | PROCEDURE FOR THE MANUFACTURE OF FIBROCISE CRYSOTILE ASBESTARK |
-
1951
- 1951-01-28 DE DE19511696259 patent/DE1696259A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
DE1696259B2 (en) | 1974-04-25 |
DE1696259A1 (en) | 1971-11-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C3 | Grant after two publication steps (3rd publication) | ||
E77 | Valid patent as to the heymanns-index 1977 | ||
EHJ | Ceased/non-payment of the annual fee |