GB1347491A - Oxidation of ammonia - Google Patents
Oxidation of ammoniaInfo
- Publication number
- GB1347491A GB1347491A GB132371A GB132371A GB1347491A GB 1347491 A GB1347491 A GB 1347491A GB 132371 A GB132371 A GB 132371A GB 132371 A GB132371 A GB 132371A GB 1347491 A GB1347491 A GB 1347491A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pad
- ammonia
- oxidation
- layers
- gauze
- 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
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title abstract 8
- 229910021529 ammonia Inorganic materials 0.000 title abstract 4
- 230000003647 oxidation Effects 0.000 title abstract 4
- 238000007254 oxidation reaction Methods 0.000 title abstract 4
- 239000002184 metal Substances 0.000 abstract 4
- 229910052751 metal Inorganic materials 0.000 abstract 4
- 239000003054 catalyst Substances 0.000 abstract 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- 239000010970 precious metal Substances 0.000 abstract 2
- 229910001020 Au alloy Inorganic materials 0.000 abstract 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 239000011651 chromium Substances 0.000 abstract 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract 1
- 239000010931 gold Substances 0.000 abstract 1
- 229910052737 gold Inorganic materials 0.000 abstract 1
- 239000003353 gold alloy Substances 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 1
- 239000011707 mineral Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000011541 reaction mixture Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 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
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/58—Fabrics or filaments
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Filtering Materials (AREA)
- Knitting Of Fabric (AREA)
Abstract
1347491 Catalytic pad ENGELHARD MINERALS & CHEMICALS CORP 11 Jan 1971 [12 Jan 1970 11 Sept 1970] 1323/71 Heading B1F [Also in Divisions C1 and El] A catalyst pad, through which a mixture of ammonia and free-oxygen containing gas passes at an elevated temperature and pressure sufficient for the ammonia's oxidation, comprises firstly layers of platinum group metal gauze and secondly a foraminous structure of randomly oriented non-precious metal wires or strands resistant to the corrosive environment occuring during oxidation. The pressure drop across the pad is equal to that across another pad consisting only of a sufficient number of layers of platinum group metal gauze to obtain at least a 95% oxidation of ammonia, the number of layers being from 10 to 50, and possessing a weight of layer of platinum group metal gauze 1¢-3 times the weight in the catalyst pad above. The non-precious metal may be nickel and/or chromium containing alloys. The structure may be obtained by compression of knitted metal mesh. Filters and/or weld-barrier screens (e.g. of gold or gold alloy) may be inserted between the gauze and foraminous structure. The reaction mixture passed through the catalyst may have a temperature of from 650C to 1000C and a pressure from 50 to 150 p.s.i.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US225570A | 1970-01-12 | 1970-01-12 | |
| US7156070A | 1970-09-11 | 1970-09-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1347491A true GB1347491A (en) | 1974-02-27 |
Family
ID=26670137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB132371A Expired GB1347491A (en) | 1970-01-12 | 1971-01-11 | Oxidation of ammonia |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS4929436B1 (en) |
| BE (1) | BE761389A (en) |
| DE (1) | DE2101188C2 (en) |
| ES (1) | ES385100A1 (en) |
| FR (1) | FR2074921A5 (en) |
| GB (1) | GB1347491A (en) |
| NL (1) | NL174243C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8178068B2 (en) | 2003-04-29 | 2012-05-15 | Johnson Matthey Plc | Catalyst charge design |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2064975B (en) * | 1979-10-18 | 1984-03-14 | Johnson Matthey Co Ltd | Fibrous catalytic materials |
| IE50367B1 (en) * | 1979-11-08 | 1986-04-02 | Johnson Matthey Co Ltd | Improvements in and relating to catalyst units |
| FR2694306B1 (en) * | 1992-07-31 | 1994-10-21 | Louyot Comptoir Lyon Alemand | Wires comprising a helical element, their assemblies and the use of said assemblies as catalyst and / or for recovering precious metals. |
| DE102018003340A1 (en) * | 2018-04-24 | 2019-10-24 | Linde Aktiengesellschaft | Prevention of corrosion damage to isothermal reactors |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1318336A (en) * | 1919-10-07 | Making oxids of bismuth | ||
| AT105358B (en) * | 1924-12-08 | 1927-01-25 | Ivar Walfrid Dr Cederberg | Device for the catalytic combustion of ammonia. |
| BE369335A (en) * | 1929-08-26 | |||
| DE838285C (en) * | 1950-02-09 | 1954-03-08 | Degussa | Process for the recovery of platinum using platinum catalysts, particularly in the oxidation of ammonia |
-
1970
- 1970-10-31 ES ES385100A patent/ES385100A1/en not_active Expired
- 1970-11-12 JP JP45099771A patent/JPS4929436B1/ja active Pending
- 1970-11-13 FR FR7040680A patent/FR2074921A5/fr not_active Expired
-
1971
- 1971-01-08 BE BE761389A patent/BE761389A/en not_active IP Right Cessation
- 1971-01-11 GB GB132371A patent/GB1347491A/en not_active Expired
- 1971-01-12 DE DE2101188A patent/DE2101188C2/en not_active Expired
- 1971-01-12 NL NLAANVRAGE7100386,A patent/NL174243C/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8178068B2 (en) | 2003-04-29 | 2012-05-15 | Johnson Matthey Plc | Catalyst charge design |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2074921A5 (en) | 1971-10-08 |
| JPS4929436B1 (en) | 1974-08-03 |
| DE2101188A1 (en) | 1971-07-22 |
| NL174243B (en) | 1983-12-16 |
| ES385100A1 (en) | 1973-03-16 |
| NL7100386A (en) | 1971-07-14 |
| DE2101188C2 (en) | 1984-10-25 |
| NL174243C (en) | 1984-05-16 |
| BE761389A (en) | 1971-07-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 414F | Notice of opposition given (sect. 14/1949) | ||
| 414B | Case decided by the comptroller ** grants allowed (sect. 14/1949) | ||
| PS | Patent sealed [section 19, patents act 1949] | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |