DE2829035A1 - Silver or platinum metal catalyst in form of fibre felt - used for ammonia oxidn. and mfr. of hydrogen cyanide and formaldehyde - Google Patents
Silver or platinum metal catalyst in form of fibre felt - used for ammonia oxidn. and mfr. of hydrogen cyanide and formaldehydeInfo
- Publication number
- DE2829035A1 DE2829035A1 DE19782829035 DE2829035A DE2829035A1 DE 2829035 A1 DE2829035 A1 DE 2829035A1 DE 19782829035 DE19782829035 DE 19782829035 DE 2829035 A DE2829035 A DE 2829035A DE 2829035 A1 DE2829035 A1 DE 2829035A1
- Authority
- DE
- Germany
- Prior art keywords
- catalyst
- catalyst according
- fibers
- metal
- needle
- 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.)
- Withdrawn
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 38
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 4
- 239000000835 fiber Substances 0.000 title claims description 28
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims description 12
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title claims description 7
- 229910021529 ammonia Inorganic materials 0.000 title claims description 6
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 title claims description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims description 3
- 239000004332 silver Substances 0.000 title claims description 3
- 229910052751 metal Inorganic materials 0.000 claims abstract description 30
- 239000002184 metal Substances 0.000 claims abstract description 30
- 230000003197 catalytic effect Effects 0.000 claims abstract description 8
- 229910052703 rhodium Inorganic materials 0.000 claims abstract description 7
- 229910001260 Pt alloy Inorganic materials 0.000 claims abstract description 4
- 150000002739 metals Chemical class 0.000 claims abstract description 4
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 4
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 3
- 239000000956 alloy Substances 0.000 claims abstract description 3
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 239000010948 rhodium Substances 0.000 claims description 5
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 5
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 239000011149 active material Substances 0.000 claims description 2
- 238000007596 consolidation process Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 229910000629 Rh alloy Inorganic materials 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- PXXKQOPKNFECSZ-UHFFFAOYSA-N platinum rhodium Chemical compound [Rh].[Pt] PXXKQOPKNFECSZ-UHFFFAOYSA-N 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003863 metallic catalyst Substances 0.000 description 1
- UPIXZLGONUBZLK-UHFFFAOYSA-N platinum Chemical compound [Pt].[Pt] UPIXZLGONUBZLK-UHFFFAOYSA-N 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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
-
- B01J35/58—
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/02—Preparation, separation or purification of hydrogen cyanide
- C01C3/0208—Preparation in gaseous phase
- C01C3/0212—Preparation in gaseous phase from hydrocarbons and ammonia in the presence of oxygen, e.g. the Andrussow-process
- C01C3/0216—Preparation in gaseous phase from hydrocarbons and ammonia in the presence of oxygen, e.g. the Andrussow-process characterised by the catalyst used
Abstract
Description
t'Eatalysator aus kIetallfasern, Verfahren zur t'Eatalyst made of metal fibers, process for
Herstellung des Katalysators und Verwendung des Katalysaors" Die Erfindung bezieht sich auf einen Katalysator aus katalytisch aktiven Metallfasern, die aus Silber, Platin, Rhodium, Palladium oder einer Legierung auf der Basis eines dieser Metalle bestehen, insbesondere aus einer Platin-Legierung, die 5 bis 10 % Rhodium enthält. Preparation of the Catalyst and Use of the Catalyst "Die The invention relates to a catalyst made of catalytically active metal fibers, those made of silver, platinum, rhodium, palladium or an alloy based on a of these metals consist, in particular of a platinum alloy, which contains 5 to 10% Contains rhodium.
Es ist bekannt, als Katalysatoren bei der Erzeugung von Salpetersäure durch Oxidation von Ammoniak feine Drahtgewebe, z B. aus Platin oder einer Platinlegierung zu verwenden (DE-PS 651 470). Bei derartigen Katalysatornetzen lagen die Metalldrähte ode -fäden in einfacher oder kreuzweiser Bindung vor. Bekannt ist es auch, die Drahte nach Art der Köper- oder Satinbindung oder nach Art köperähnlicher Tressengewebe miteinander zu verbinden (DE-PS 590 468). Katalysatornetze aus Streifen aus Platin-Rhodium-Legierungen für die katalytische Oxidation von Ammoniak oder für das Kracken von Kohlenwasserstoffen sind ebenfalls bekannt (US-PS 2 685 547). Bekannt ist ferner die Verwendung von Metallfaservliesen als katalytischer Werkstoff in Anordnungen zur katalytischen Nachverbrennung von Kraftfahrzeugabgasen (DE-PS 1-594716).It is known to act as catalysts in the production of nitric acid through oxidation of ammonia fine wire mesh, e.g. made of platinum or a platinum alloy to be used (DE-PS 651 470). The metal wires lay in such catalyst meshes ode threads in a single or criss-cross weave. It is also known, the wires according to the type of twill or satin weave or according to the type of twill-like weave to be connected to each other (DE-PS 590 468). Catalyst mesh made from strips of platinum-rhodium alloys for the catalytic oxidation of ammonia or for the cracking of hydrocarbons are also known (US Pat. No. 2,685,547). The use of Metal fiber fleeces as a catalytic material in arrangements for catalytic Post-combustion of vehicle exhaust gases (DE-PS 1-594716).
4 Aufgabe der Erfindung ist es, einen metallischen Katalysator ausreichend hoher nechanischer Formstabilität zu schaffen, der nicht nur eine möglichst grosse Koltaktfläche und damit eine hohe katalytische Wirksamkeit aufweist, sondern auch in zeit- und kostensparender Weise herstellbar ist. 4 The object of the invention is to provide a metallic catalyst sufficient to create high mechanical dimensional stability, which is not only as large as possible Has Koltakt and thus a high catalytic effectiveness, but also can be produced in a time- and cost-saving manner.
Gelöst wird diese Aufgabe für einen Katalysator der eingangs charakterisierten Art erfindungsgemäss dadurch, dass die Metallfasern nach Art eines Nadelverbundwerkstoffs filzartig untereinander verbunden sind. Zur Herstellung beliebig grosser Katalysatorkörper sind mehrere Bahnen aus dem Nadelverbundwerkstoff aus Metallfasern miteinarier verhakt.This problem is solved for a catalyst of the type characterized at the outset Type according to the invention in that the metal fibers are in the manner of a needle composite material are connected to each other in a felt-like manner. For the production of catalyst bodies of any size Several webs of the needle composite material made of metal fibers are hooked together.
Dabei können die Bahnen nebeneinander und/oder übereinander angeordnet sein. Bei Übereinander-Anordnung der Bahnen hat sich eine Anordnung bewahrt, bei der sich die Bahnen kreuzen. Zur Randverfestigung grossflächiger, aus mehreren Bahnen bestehender Katalysatoren sind die Randfasern mit einander verschweisst, was zweckmässig durch Hammerschweissen erfolgt. Das Verhaken einzelner Bahnen erfolgt manuell.The tracks can be arranged next to one another and / or one above the other be. When the tracks are arranged one above the other, an arrangement has been retained at who cross paths. For edge consolidation of large areas, from several strips In existing catalysts, the edge fibers are welded together, which is useful done by hammer welding. Individual lanes are hooked up manually.
Die Herstellung der erfindungsgemässen Katalysatoren ist ausserordentlich einfach. Von einem Metallband aus katalytisch aktivem Werkstoff, beispielsweise aus einer Platin-Rhodium-Legierung, die, abgesehen von unvermeidbaren Verunreinigungen, aus 90 zu% Platin Platin und 10 ,-' Rhodium besteht, werden mittels einer Vielzahl von nebeneinander angeordneten Messern schmale, bändchenförmige Fasern abgeschält. Das so entstehende Faservlies wird danach einem Nadelstuhl zugeführt, und auf diesem werden die Metallfasern durch mit fiderhäkohen versehene Nadeln filzartig miteinander verbunden. Als Endprodukt liegt eine Bahn eines Nadelverbundwerkstoffes aus Metallfasern vor, die aus katalytisch aktivem Metall bestehen.The production of the catalysts according to the invention is extraordinary simple. From a metal strip made of catalytically active material, for example made of a platinum-rhodium alloy which, apart from unavoidable impurities, consists of 90 to% platinum platinum and 10, - 'rhodium, are by means of a variety peeled off narrow, ribbon-shaped fibers by knives arranged next to each other. The resulting fiber fleece is then fed to a needle loom and on it the metal fibers are felt-like with each other by means of needles provided with fiderhäkohen tied together. The end product is a web of needle composite material made of metal fibers which consist of catalytically active metal.
Der Querschnitt einer abgeschälten bändchenförmigen Faser ist in etwa rechteckig und besitzt beispielsweise elne Grösse von 100/um mal 501um. Die Länge einer bändchenförmigen Faser hängt im wesentlichen von der Länge des Ivfetallbandes ab, von dem es abgeschält wird; als Beispiel seien hier Längen zwischen 10 cm und 1 m genannt.The cross section of a peeled ribbon-shaped fiber is approximately rectangular and has, for example, a size of 100 µm by 501 µm. The length a ribbon-shaped fiber depends essentially on the length of the metal ribbon from which it is peeled off; as an example, lengths between 10 cm and Called 1 m.
Anhand der Figuren wird die Erfindung erläutert.The invention is explained with the aid of the figures.
Es zeigen: Fig. 1 eine Aufsicht auf einen Ausschnitt eines erfindungsgemässen Katalysators; Fig. 2 einen Querschnitt durch eine bändchen-förmige Metalifaser; Fig. 3A eine Aufsicht auf ein Katalysatorgebilde; Fig. 3B eine Aufsicht auf ein Katalysatorgebilde; Fig. 4 einen Querschnitt durch eine Katalysator-Anordnung.They show: FIG. 1 a plan view of a section of an inventive Catalyst; 2 shows a cross section through a ribbon-shaped metal fiber; 3A shows a plan view of a catalyst structure; 3B is a plan view of a Catalyst structure; 4 shows a cross section through a catalytic converter arrangement.
Wie aus Figur 1 zu erkennen ist, bildet der aus filzartig nach Art eines Nadelverbundwerkstoffes untereinander verbundenen Metallfasern 1 bestehende Katalysator 5 ein optisch dichtes, aber gas- oder flüssigkeitsdurchlässiges Gebilde.As can be seen from Figure 1, the felt-like according to Art a needle composite material interconnected metal fibers 1 existing Catalyst 5 is an optically dense, but gas- or liquid-permeable structure.
Die einzelnen bändchenförmigen Metallfasern 1 aus katalytisch aktivem Metall besitzen einen etwa rechteckigen Querschnitt, wie er in Figur 2 vergrössert, aber nicht massstabsgerecht, dargestellt ist. Die als Endprodukt aus dem Nadelstuhl herauskommenden Bahnen 2 können, wie aus Figur 3A zu ersehen ist, nebeneinander oder, wie aus Figur 3B ersichtlich, übereinander, vorteilhafterweise sich kreuzend, angeordnet werden.The individual ribbon-shaped metal fibers 1 made of catalytically active Metal have an approximately rectangular cross-section, as enlarged in Figure 2, but not to scale. The end product from the needle loom Outgoing webs 2 can, as can be seen from Figure 3A, side by side or, as can be seen from Figure 3B, one above the other, advantageously crossing one another, to be ordered.
Manuell werden die einzelnen Bahnen miteinander verhakt, Die Verhakung wird durch die rauhe Oberfläche und die Kontur der bändchenförmigen Fasern, wie beispielsweise aus Figur 2 ersichtlich, gefördert. Zur Randverfestigung eines Katalysabor -Gebildes werden die Ran-etallfasern, wie durch den Pfeil 3 in Figur 3A angedeutet, durch Hammerschweissen fest miteinander verbunden.The individual tracks are manually hooked together, the hooking is characterized by the rough surface and the contour of the ribbon-shaped fibers, such as for example, from Figure 2, promoted. For strengthening the edge of a catalyst laboratory Picture the Ran metal fibers, as indicated by the arrow 3 in Figure 3A, through Hammer welding firmly connected to each other.
Aus erSinQun=mgemässen Katalysatoren lassen sich kreisförmige Katalysator-Gebilde herstellen, die einen Durchmesser zwischen 1 m und 5 m besitzen, und zwar in der Weise, dass mehrere Bahnen, wie in Figur 3A dargestellt, nebeneinander angeordnet und miteinander verhakt werden und dann aus diesem Gebilde ein kreisförmiger Katalysator ausgeschnitten und am Kreisumfang durch Hammerschweissen der Fasern der Rand des Katalysators verfestigt wird. Solche kreisförmigen Katalysatoren können beispielsweise in Mitteldruckreaktoren von Anlagen zur Salpetersäureherstellung durch Ammoniakoxidation eingesetzt werden. Dabei hat es sich als vorteilhaft erwiesen, den kreisförmigen Katalysator 6 zwischen zwei gasdurchlässigen Tragkörpern 4, wie in Figur 4 dargestellt, anzuordnen. Diese Tragkörper 4 bestehen dabei vorteilhafterweise aus einem Metal -Drahtnetz z.B. aus einer hochhitzebeständigen Chrom-Aluminium Eisen-Legierung oder aus einem Raschigringe enthaltenden Korb. Als Metallnetz kann auch ein solches von herkömmlicher Art, wie es- beispielsweise aus den in der Einleitung zitierten Patentschriften bekannt ist, verwendet werden.Circular catalyst structures can be created from catalysts according to erSinQun = m Manufacture that have a diameter between 1 m and 5 m, namely in the Way that several tracks, as shown in Figure 3A, arranged side by side and are hooked together and then from this structure a circular catalyst cut out and on the circumference by hammer welding the fibers of the edge of the Catalyst is solidified. Such circular catalysts can, for example in medium pressure reactors of plants for nitric acid production by ammonia oxidation can be used. It has proven to be advantageous to use the circular Catalyst 6 between two gas-permeable support bodies 4, as shown in Figure 4, to arrange. These support bodies 4 advantageously consist of a metal -Wire mesh e.g. made of a highly heat-resistant chrome-aluminum iron alloy or from a basket containing Raschig rings. A metal mesh from of a conventional type, such as, for example, from the patents cited in the introduction known to be used.
Die erfindungsgemäss ausgebildeten Katalysatoren sind auf vielen Gebieten einsetzbar; beispielsweise können sie überall dort eingesdzt werden, wo die bekannten Drahtgewebe aus den genannten katalytisch aktiven Metallen verwendet werden.The catalysts designed according to the invention are used in many fields applicable; for example, they can be used wherever the known Wire mesh made of the catalytically active metals mentioned can be used.
Besonders bewährt hat sich die Verwendung von erfindungsgemässen Katalysatoren für die Ammoniakoxidation, für die Blausäureherstellung oder die Formaldehydherstellung. LeerseiteThe use of catalysts according to the invention has proven particularly useful for ammonia oxidation, hydrogen cyanide production or formaldehyde production. Blank page
Claims (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782829035 DE2829035A1 (en) | 1978-07-01 | 1978-07-01 | Silver or platinum metal catalyst in form of fibre felt - used for ammonia oxidn. and mfr. of hydrogen cyanide and formaldehyde |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782829035 DE2829035A1 (en) | 1978-07-01 | 1978-07-01 | Silver or platinum metal catalyst in form of fibre felt - used for ammonia oxidn. and mfr. of hydrogen cyanide and formaldehyde |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2829035A1 true DE2829035A1 (en) | 1980-01-10 |
Family
ID=6043335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19782829035 Withdrawn DE2829035A1 (en) | 1978-07-01 | 1978-07-01 | Silver or platinum metal catalyst in form of fibre felt - used for ammonia oxidn. and mfr. of hydrogen cyanide and formaldehyde |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2829035A1 (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2467629A1 (en) * | 1979-10-18 | 1981-04-30 | Johnson Matthey Co Ltd | FIBER CATALYST ASSEMBLY AND APPLICATION |
| EP0474972A1 (en) * | 1990-09-12 | 1992-03-18 | W.C. Heraeus GmbH | Catalytic net preparation process, the catalytic net and use thereof |
| EP0504723A1 (en) * | 1991-03-16 | 1992-09-23 | Degussa Aktiengesellschaft | Preparation process of permeable precious metal nets for catalytic processes |
| EP0519699A1 (en) * | 1991-06-17 | 1992-12-23 | Johnson Matthey Public Limited Company | Low pressure drop, high surface area oxidation catalyst and catalyst for production of hydrocyanic acid |
| US5226210A (en) * | 1989-01-23 | 1993-07-13 | Minnesota Mining And Manufacturing Company | Method of forming metal fiber mat/polymer composite |
| US5268157A (en) * | 1991-03-16 | 1993-12-07 | Degussa Aktiengesellschaft | Process for the production of catalytic gas permeable nets and process for oxidizing ammonia |
| US5278124A (en) * | 1991-06-17 | 1994-01-11 | Johnson Matthey, Inc. | Low pressure drop, high surface area ammonia oxidation catalyst |
| US5356603A (en) * | 1991-06-17 | 1994-10-18 | Johnson Matthey Inc. | Method for the production of hydrocyanic acid using a corrugated catalyst |
| EP0680787A1 (en) * | 1994-04-06 | 1995-11-08 | Degussa Aktiengesellschaft | Catalytic networks for gas phase reactions |
| US6073467A (en) * | 1994-04-06 | 2000-06-13 | Degussa Aktiengesellschaft | Catalyst gauzes for gaseous reactions |
| DE10144285A1 (en) * | 2001-09-08 | 2003-03-27 | Viessmann Werke Kg | Apparatus for generating hydrogen |
| DE102011016044A1 (en) | 2011-04-04 | 2012-10-04 | Jens Kopatsch | Preparing woven, knitted and/or crocheted metal-, precious metal- or alloy grids, comprises deforming or molding wire with non-circular peripheral shape via pulling, rolling, pressing or shape-changing radiation to produce shaped wire |
| WO2012146528A1 (en) | 2011-04-26 | 2012-11-01 | Basf Se | Process for oxidative dehydrogenation of methanol to formaldehyde over silver-containing knits |
| US8569546B2 (en) | 2011-04-26 | 2013-10-29 | Basf Se | Oxidative dehydrogenation of methanol to formaldehyde over silver-containing knits |
| DE102014226714A1 (en) | 2014-12-19 | 2015-11-19 | Heraeus Deutschland GmbH & Co. KG | catalyst fleece |
| WO2018065271A1 (en) * | 2016-10-06 | 2018-04-12 | Umicore Ag & Co.Kg | A wire for manufacturing catalyst gauzes |
| WO2018153736A1 (en) | 2017-02-24 | 2018-08-30 | Basf Se | Silver catalyst system having a reduced pressure drop for the oxidative dehydrogenation of alcohols |
| EP3539657A1 (en) | 2018-03-14 | 2019-09-18 | Basf Se | Improved catalysts comprising silver based intermetallic compounds |
-
1978
- 1978-07-01 DE DE19782829035 patent/DE2829035A1/en not_active Withdrawn
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2467629A1 (en) * | 1979-10-18 | 1981-04-30 | Johnson Matthey Co Ltd | FIBER CATALYST ASSEMBLY AND APPLICATION |
| US5226210A (en) * | 1989-01-23 | 1993-07-13 | Minnesota Mining And Manufacturing Company | Method of forming metal fiber mat/polymer composite |
| EP0474972A1 (en) * | 1990-09-12 | 1992-03-18 | W.C. Heraeus GmbH | Catalytic net preparation process, the catalytic net and use thereof |
| EP0504723A1 (en) * | 1991-03-16 | 1992-09-23 | Degussa Aktiengesellschaft | Preparation process of permeable precious metal nets for catalytic processes |
| US5268157A (en) * | 1991-03-16 | 1993-12-07 | Degussa Aktiengesellschaft | Process for the production of catalytic gas permeable nets and process for oxidizing ammonia |
| TR26402A (en) * | 1991-03-16 | 1995-03-15 | Degussa | A PROCESS FOR THE PRODUCTION OF GAS GENERATIVE VALUABLE METAL NETWORKS FOR CATALYSTIC PROCEDURES |
| EP0519699A1 (en) * | 1991-06-17 | 1992-12-23 | Johnson Matthey Public Limited Company | Low pressure drop, high surface area oxidation catalyst and catalyst for production of hydrocyanic acid |
| US5278124A (en) * | 1991-06-17 | 1994-01-11 | Johnson Matthey, Inc. | Low pressure drop, high surface area ammonia oxidation catalyst |
| US5356603A (en) * | 1991-06-17 | 1994-10-18 | Johnson Matthey Inc. | Method for the production of hydrocyanic acid using a corrugated catalyst |
| TR26289A (en) * | 1991-06-17 | 1995-03-15 | Johnson Matthey Inc | LOW PRESSURE DROP, HIGH-SIDED AMMONIA OXIDATION CATALYST AND CATALYST FOR HYDROCYANIC ACID PRODUCTION |
| EP0680787A1 (en) * | 1994-04-06 | 1995-11-08 | Degussa Aktiengesellschaft | Catalytic networks for gas phase reactions |
| US6073467A (en) * | 1994-04-06 | 2000-06-13 | Degussa Aktiengesellschaft | Catalyst gauzes for gaseous reactions |
| DE10144285A1 (en) * | 2001-09-08 | 2003-03-27 | Viessmann Werke Kg | Apparatus for generating hydrogen |
| DE102011016044A1 (en) | 2011-04-04 | 2012-10-04 | Jens Kopatsch | Preparing woven, knitted and/or crocheted metal-, precious metal- or alloy grids, comprises deforming or molding wire with non-circular peripheral shape via pulling, rolling, pressing or shape-changing radiation to produce shaped wire |
| WO2012146528A1 (en) | 2011-04-26 | 2012-11-01 | Basf Se | Process for oxidative dehydrogenation of methanol to formaldehyde over silver-containing knits |
| US8569546B2 (en) | 2011-04-26 | 2013-10-29 | Basf Se | Oxidative dehydrogenation of methanol to formaldehyde over silver-containing knits |
| DE102014226714A1 (en) | 2014-12-19 | 2015-11-19 | Heraeus Deutschland GmbH & Co. KG | catalyst fleece |
| WO2018065271A1 (en) * | 2016-10-06 | 2018-04-12 | Umicore Ag & Co.Kg | A wire for manufacturing catalyst gauzes |
| WO2018153736A1 (en) | 2017-02-24 | 2018-08-30 | Basf Se | Silver catalyst system having a reduced pressure drop for the oxidative dehydrogenation of alcohols |
| EP3539657A1 (en) | 2018-03-14 | 2019-09-18 | Basf Se | Improved catalysts comprising silver based intermetallic compounds |
| WO2019175128A1 (en) | 2018-03-14 | 2019-09-19 | Basf Se | Improved catalysts comprising silver based intermetallic compounds |
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