DE746733C - Process for the production of metal meshes from pure platinum - Google Patents
Process for the production of metal meshes from pure platinumInfo
- Publication number
- DE746733C DE746733C DEH143236D DEH0143236D DE746733C DE 746733 C DE746733 C DE 746733C DE H143236 D DEH143236 D DE H143236D DE H0143236 D DEH0143236 D DE H0143236D DE 746733 C DE746733 C DE 746733C
- Authority
- DE
- Germany
- Prior art keywords
- production
- pure platinum
- metal meshes
- wire
- hardness
- 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
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
- C01B21/24—Nitric oxide (NO)
- C01B21/26—Preparation by catalytic or non-catalytic oxidation of ammonia
- C01B21/265—Preparation by catalytic or non-catalytic oxidation of ammonia characterised by the catalyst
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Wire Processing (AREA)
- Catalysts (AREA)
Description
Verfahren zur Herstellung von Metallgeweben aus reinem Platin Durch das Patent 734 815 wird ein '\'erfahren zur Herstellung von Metallgeweben aus Platin-Rhodium-Drähten als Katalysatoren für die Ammoniakverbrennung unter Schutz gestellt, bei .dem zur Verminderung des Onerdruckes Platin-Rho-dium-Drähte größerer Härte als Kette, solche geringerer Härte als Schuß zu einem Gewebe verarbeitet werden.Process for the production of metal meshes from pure platinum Patent 734 815 provides protection for the production of metal meshes from platinum-rhodium wires as catalysts for ammonia combustion, with platinum-rho-dium to reduce the oner pressure - Wires of greater hardness than warp, those of lower hardness than weft are processed into a fabric.
Da in der Stickstoffindustrie auch noch Netze aus reinem Platin verwendet werden, besteht die Verbesserung in der Anwendung des Verfahrens nach dem Hauptpatent zur Herstellung von Geweben aus Netzen aus reinem Platin. Zu diesem Zweck wird bei dem für die Weberei zur Verwendung kommenden Reinplatindraht dem Kettendraht die durch das Feinziehen bewirkte Ziehbärte belassen und der Schußdraht durch eine Glühbehandlung weicher gemacht: Dann spannt s s ich beim Verweben der Schußdraht nicht so scharf als wenn er ebenso hart wäre wie der Kettendraht, sondern er legt dich infolge seiner größeren Weichheit um diesen herum, so daß ein Gewebe entsteht, bei dem Kette und Schuß gleichmäßig ineinander verschlungen sind. Demgemäß besteht die Erfindung darin, daß zur Abstufung der Härte des Kettendrahtes gegenüber dem Schußdraht der Schußdraht einer Glühbehandlung unterworfen wird. Es ist bekannt, die mechanische Festigkeit von Metallgeweben für die Katalyse dadurch zu verbessern, daß man die Leinwand:hindung durch ein Tressengewebe ersetzte. Demgegenüber ist das neue Verfahren wesentlich einfacher. Es kann auch nicht in Vergleich gesetzt werden mit solchen Geweben, deren Festigkeit angeblich durch mechanische Bearbeitung, wie Pressen oder Hämmern, erhöht werden soll, weil bekanntlich jede Bearbeitungshärte durch Rekristallisation wieder aufgehoben wird, sobald derart behandelte Netze 'bei Glühtemperaturen in Betrieb sind. Schließlich wird die erfindungsgemäße Aufgabe auch nicht dadurch _gelöst, ziaLi inan in verschiedenen Netzen jeweils Drähte der gleichen Zusammensetzung verwendet. Die Erfindung besteht demgemäß in damn wesentlich einfacheren t-Veg, nur ein einziges -Netz zti verwenden, in welchem Drähte verschiedener Härte genleinsatn bi-nutzt werden.Because nets made of pure platinum are also used in the nitrogen industry the improvement consists in the application of the method according to the main patent for the production of fabrics from nets made of pure platinum. To this end, at the pure platinum wire used for weaving the chain wire the The draw beards caused by the fine drawing are left in place and the weft wire is subjected to an annealing treatment Made softer: Then I don't stretch the weft wire so sharply when weaving it as if it were as hard as the chain-wire, but it lays you down because of it greater softness around them, so that a fabric is created in which warp and Shot are intertwined evenly. Accordingly, the invention consists in that to graduate the hardness of the warp wire compared to the weft wire of the weft wire is subjected to an annealing treatment. It is known the mechanical strength to improve metal meshes for catalysis by making the canvas: binding replaced by a braided weave. In contrast, the new process is essential easier. Nor can it be compared with such tissues, whose Strength allegedly increased by mechanical processing such as pressing or hammering should be because it is well known that any machining hardness is restored by recrystallization is canceled as soon as networks treated in this way are in operation at annealing temperatures are. Finally, the inventive Neither task This solved the problem that wires of the same kind were used in different networks Composition used. The invention accordingly consists in much simpler ones t-Veg, only use a single net zti, in which wires of different hardness genleinsatn bi-uses.
Claims (1)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEH143189D DE734815C (en) | 1935-03-24 | 1935-03-24 | Process for the production of metal meshes from platinum rhodium wires as catalysts for ammonia combustion |
| DEH143236D DE746733C (en) | 1935-03-24 | 1935-03-27 | Process for the production of metal meshes from pure platinum |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEH143189D DE734815C (en) | 1935-03-24 | 1935-03-24 | Process for the production of metal meshes from platinum rhodium wires as catalysts for ammonia combustion |
| DEH143236D DE746733C (en) | 1935-03-24 | 1935-03-27 | Process for the production of metal meshes from pure platinum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE746733C true DE746733C (en) | 1944-08-21 |
Family
ID=25981046
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEH143189D Expired DE734815C (en) | 1935-03-24 | 1935-03-24 | Process for the production of metal meshes from platinum rhodium wires as catalysts for ammonia combustion |
| DEH143236D Expired DE746733C (en) | 1935-03-24 | 1935-03-27 | Process for the production of metal meshes from pure platinum |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEH143189D Expired DE734815C (en) | 1935-03-24 | 1935-03-24 | Process for the production of metal meshes from platinum rhodium wires as catalysts for ammonia combustion |
Country Status (1)
| Country | Link |
|---|---|
| DE (2) | DE734815C (en) |
-
1935
- 1935-03-24 DE DEH143189D patent/DE734815C/en not_active Expired
- 1935-03-27 DE DEH143236D patent/DE746733C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE734815C (en) | 1943-04-29 |
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