WO2016028191A1 - Сплав на основе платины для катализаторных сеток - Google Patents
Сплав на основе платины для катализаторных сеток Download PDFInfo
- Publication number
- WO2016028191A1 WO2016028191A1 PCT/RU2015/000509 RU2015000509W WO2016028191A1 WO 2016028191 A1 WO2016028191 A1 WO 2016028191A1 RU 2015000509 W RU2015000509 W RU 2015000509W WO 2016028191 A1 WO2016028191 A1 WO 2016028191A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- alloy
- platinum
- catalyst
- rhodium
- manufacture
- Prior art date
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/04—Alloys based on a platinum group metal
Definitions
- the invention relates to the field of metallurgy of noble metals, in particular, to platinum alloys intended for the manufacture of catalyst networks used by the chemical industry.
- catalytic mesh bags at the chemical industry in the oxidation of ammonia (in the production of nitric acid and its derivatives) is widely practiced at enterprises around the world.
- the catalytic function in this case is performed, as a rule, by grids made of platinum alloys. Severe operating conditions (high temperature and pressure) lead to gradual erosion and destruction of the mesh web.
- This alloy has a high catalytic activity, provides acceptable survivability of the catalytic packages during their operation, and is adopted as a prototype of the claimed alloy.
- the disadvantage of the prototype alloy is the lack of stability of the mechanical properties of the semi-finished products made from it along their length and cross section, caused by the formation of inhomogeneous zones with a different grain structure, which forms during crystallization of cast billets, which causes process disruptions during wire drawing and mesh manufacturing.
- the presence of oversized grains along with small grains in the structure of the prototype cast alloy is undesirable, as it leads to technological difficulties in the manufacture of thin wire, and then the mesh fabric.
- the task to which the proposed technical solution is directed is to develop the composition of a new alloy based on platinum for catalyst grids, which ensures the formation of a homogeneous fine-grained structure during crystallization of cast billets, obtaining semi-finished products with stable mechanical properties.
- the alloy should provide long-term operation of the catalyst networks made from it while maintaining high catalytic activity.
- the alloy based on platinum for catalyst networks containing rhodium additionally contains iridium and tantalum in the following ratio of components, mass. %:
- composition of the inventive alloy of the combined additives of iridium and tantalum which are effective modifiers, ensures a high rate of nucleation of the new phase during crystallization of the melt and the formation of a fine-grained homogeneous structure, which allows to obtain cast billets and semi-finished products with stable mechanical properties, both along their length and cross section .
- introduction of iridium and tantalum additives into the alloy increases the technological properties of the alloy when it is used for the manufacture of thin wire and mesh fabric.
- the ratio of the components in the inventive alloy is proposed on the basis of experimental studies, including the preparation of various alloys, making thin wires and catalyst networks from them, evaluating the survivability and catalytic activity of the latter, when they are included in various catalytic packages in ammonia oxidation apparatuses.
- the content of rhodium in the inventive alloy in the range from 4.5% to 10.5% ensures the preservation of the necessary mechanical characteristics of the alloy and the nets made from it and is optimal.
- the ratio of platinum and rhodium in the inventive alloy is also optimal, selected experimentally, based on the need to maintain high catalytic activity of the grids and ensure a long life.
- the preparation of a platinum alloy for catalyst networks was carried out by direct fusion of pure platinum, rhodium, tantalum, and PL-5 alloy, which was used as a ligature. Melting was carried out in an induction furnace UIPV-63-10-0.01 of the company "RELTEC” in a crucible made of zirconia stabilized with CaO.
- composition of the charge is a composition of the charge:
- Rhodium powder (with a purity of not less than 99.95% of the main component) - 540.1 g.
- the mixture was melted in an argon atmosphere.
- the melt was subjected to isothermal exposure for 4 minutes, the melt was drained at a temperature of 1800 ° C (according to the readings of an optical pyrometer), in an argon atmosphere, into a copper mold preheated to 200 ° C.
- the ingot was cooled in the mold for 30 minutes, after which the furnace lid was opened, the ingot was unloaded, and its further cooling was carried out by lowering it into running water.
- the mass of the obtained alloy was 7200.1 g. After mechanical cleaning of the surface, the obtained ingot was tested, the sample was subjected to chemical analysis. Chemical analysis of the sample showed that the resulting alloy contains 7.49% rhodium, 0.011% iridium, 0.15% tantalum, the rest is platinum.
- the resulting alloy was forged into bars with a cross section of 15 * 15 (mm), length (260-290) mm and was successfully used for the manufacture of a catalyst mesh.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EA201692144A EA028738B1 (ru) | 2014-08-21 | 2015-08-13 | Сплав на основе платины для катализаторных сеток |
UAA201611633A UA115212C2 (uk) | 2014-08-21 | 2015-08-13 | Сплав на основі платини для каталізаторних сіток |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2014134348 | 2014-08-21 | ||
RU2014134348/02A RU2563113C1 (ru) | 2014-08-21 | 2014-08-21 | Сплав на основе платины для катализаторных сеток |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016028191A1 true WO2016028191A1 (ru) | 2016-02-25 |
Family
ID=54147684
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/RU2015/000509 WO2016028191A1 (ru) | 2014-08-21 | 2015-08-13 | Сплав на основе платины для катализаторных сеток |
Country Status (5)
Country | Link |
---|---|
EA (1) | EA028738B1 (ru) |
GE (1) | GEP20186894B (ru) |
RU (1) | RU2563113C1 (ru) |
UA (1) | UA115212C2 (ru) |
WO (1) | WO2016028191A1 (ru) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0163410A1 (en) * | 1984-05-01 | 1985-12-04 | The Standard Oil Company | Electrolysis of halide-containing solutions with platinum based amorphous metal alloy anodes |
US6045424A (en) * | 1998-07-13 | 2000-04-04 | Alliedsignal Inc. | Spark plug tip having platinum based alloys |
JP2005029879A (ja) * | 2003-07-14 | 2005-02-03 | Kuwayama Corp | インジウムを含有する宝飾品用硬化白金合金及び製品 |
RU2333794C1 (ru) * | 2007-03-05 | 2008-09-20 | Александр Алексеевич Рябчиков | Катализатор для окисления аммиака |
RU2439182C1 (ru) * | 2011-01-12 | 2012-01-10 | Открытое акционерное общество "Красноярский завод цветных металлов имени В.Н. Гулидова" (ОАО "Красцветмет") | Платиновый сплав для катализаторных сеток |
-
2014
- 2014-08-21 RU RU2014134348/02A patent/RU2563113C1/ru active
-
2015
- 2015-08-13 GE GEAP201514324A patent/GEP20186894B/en unknown
- 2015-08-13 WO PCT/RU2015/000509 patent/WO2016028191A1/ru active Application Filing
- 2015-08-13 EA EA201692144A patent/EA028738B1/ru not_active IP Right Cessation
- 2015-08-13 UA UAA201611633A patent/UA115212C2/uk unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0163410A1 (en) * | 1984-05-01 | 1985-12-04 | The Standard Oil Company | Electrolysis of halide-containing solutions with platinum based amorphous metal alloy anodes |
US6045424A (en) * | 1998-07-13 | 2000-04-04 | Alliedsignal Inc. | Spark plug tip having platinum based alloys |
JP2005029879A (ja) * | 2003-07-14 | 2005-02-03 | Kuwayama Corp | インジウムを含有する宝飾品用硬化白金合金及び製品 |
RU2333794C1 (ru) * | 2007-03-05 | 2008-09-20 | Александр Алексеевич Рябчиков | Катализатор для окисления аммиака |
RU2439182C1 (ru) * | 2011-01-12 | 2012-01-10 | Открытое акционерное общество "Красноярский завод цветных металлов имени В.Н. Гулидова" (ОАО "Красцветмет") | Платиновый сплав для катализаторных сеток |
Also Published As
Publication number | Publication date |
---|---|
GEP20186894B (en) | 2018-09-10 |
RU2563113C1 (ru) | 2015-09-20 |
UA115212C2 (uk) | 2017-09-25 |
EA201692144A1 (ru) | 2017-04-28 |
EA028738B1 (ru) | 2017-12-29 |
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