GB821139A - Improved method for the manufacture of hydrogen cyanide - Google Patents
Improved method for the manufacture of hydrogen cyanideInfo
- Publication number
- GB821139A GB821139A GB3371/56A GB337156A GB821139A GB 821139 A GB821139 A GB 821139A GB 3371/56 A GB3371/56 A GB 3371/56A GB 337156 A GB337156 A GB 337156A GB 821139 A GB821139 A GB 821139A
- Authority
- GB
- United Kingdom
- Prior art keywords
- catalyst surface
- methane
- platinum
- heated catalyst
- gas
- 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
- 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
- C01C3/0229—Preparation in gaseous phase from hydrocarbons and ammonia in the absence of oxygen, e.g. HMA-process
- C01C3/0233—Preparation in gaseous phase from hydrocarbons and ammonia in the absence of oxygen, e.g. HMA-process making use of fluidised beds, e.g. the Shawinigan-process
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
Abstract
Hydrogen cyanide is produced by passing a mixture of methane, ethane, propane or butane and ammonia at a temperature of ca. 900-1400 DEG C., preferably 1100-1250 DEG C., through an annular reaction chamber formed by two concentric tubes at least one of which is provided with a heated catalyst surface in contact with the gas mixture at a velocity of 25-200 m./sec., the dimensions of the chamber and the extent of heating thereof being such that (a) the cross-sectional area of the chamber is at least 2 sq. cm., (b) the maximum distance of the gas molecules from the nearest part of the heated catalyst surface is 1.5-10 mm., preferably 3-5 mm., (c) the ratio of cross-sectional area to heated catalyst surface is 1 : 200-800, (d) the length of heated surface is 60-300 cm., and (e) the contact time of the gas with the heated catalyst surface is 0.02-0.06 sec. Mixtures of the hydrocarbons specified or natural gas may be used instead of a single hydrocarbon. When using methane the ratio of ammonia to methane may be 1 : 0.85-1.1. The tube may be of sillimanite or chrome-nickel steel. The catalyst may be platinum-ruthenium, platinumrhodium, platinum - iridium - rhodium or platinum-palladium-rhodium. Electric heating elements may be arranged outside the outer tube or both outside the outer tube and inside the inner tube. A number of tubes may be arranged in parallel.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH821139X | 1955-02-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB821139A true GB821139A (en) | 1959-09-30 |
Family
ID=4539447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3371/56A Expired GB821139A (en) | 1955-02-03 | 1956-02-02 | Improved method for the manufacture of hydrogen cyanide |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB821139A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2453108A1 (en) * | 1979-04-06 | 1980-10-31 | Degussa | PROCESS FOR THE MANUFACTURE OF CYANHYDRIC ACID |
| WO2006050781A2 (en) * | 2004-11-12 | 2006-05-18 | Degussa Gmbh | Method for producing hydrogen cyanide and a reaction tube used for carrying out said method |
-
1956
- 1956-02-02 GB GB3371/56A patent/GB821139A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2453108A1 (en) * | 1979-04-06 | 1980-10-31 | Degussa | PROCESS FOR THE MANUFACTURE OF CYANHYDRIC ACID |
| US4289741A (en) * | 1979-04-06 | 1981-09-15 | Degussa Aktiengesellschaft | Process for the production of hydrogen cyanide |
| WO2006050781A2 (en) * | 2004-11-12 | 2006-05-18 | Degussa Gmbh | Method for producing hydrogen cyanide and a reaction tube used for carrying out said method |
| WO2006050781A3 (en) * | 2004-11-12 | 2007-01-25 | Degussa | Method for producing hydrogen cyanide and a reaction tube used for carrying out said method |
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