GB910131A - Improvements in or relating to processes for increasing the concentration of nitric acid - Google Patents
Improvements in or relating to processes for increasing the concentration of nitric acidInfo
- Publication number
- GB910131A GB910131A GB2691557A GB2691557A GB910131A GB 910131 A GB910131 A GB 910131A GB 2691557 A GB2691557 A GB 2691557A GB 2691557 A GB2691557 A GB 2691557A GB 910131 A GB910131 A GB 910131A
- Authority
- GB
- United Kingdom
- Prior art keywords
- air
- concentration
- acid
- amount
- excess
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Nitric acid of at least 95% is produced by reacting under agitation at pressures 5-20 atmos. acid of at least 87% with liquid nitrogen peroxide and air at 50 DEG -75 DEG C., the NO2 being initially present in at least 30 fold excess, and the amount of air supplied being at least double the stoichiometric amount. If acid of less than 87% is to be concentrated then this acid is contacted at the same pressures with liquid NO2 and air at 20-45 DEG C., the NO2 being initially present in at least 15 fold excess, and the amount of air being at least the stoichiometric amount, until the concentration is 87%, when conditions are adjusted as above for further concentration. If oxygen is used in place of air, the pressure and NO2 excess conditions are the same, but below 87% the temperature is 50 DEG -65 DEG C. and above is 40 DEG -60 DEG C. and the amount of O2 supplied is stoichiometric throughout. In operation, with air, concentration up to 87% may be carried out at 8-12 atmos., 30 DEG C., a liquid NO2:acid wt. ratio of 6-8 to 1, and an air supply of 1 1/2 -2 times in excess of the stoichiometric amount. Concentration above 87% is effected at 8-12 atmos., 60 DEG C.; a liquid NO2:acid wt. ratio of 4 to 1, and an air supply of 2 1/2 -3 times in excess of the stoichiometric amount. Where O2 is used in place of air concentration up to 87% is at 60 DEG C. and concentration above is at 50 DEG C. The process may be carried out continuously in a series of multistage reactor vessels. Specifications 120,378, 131,336 and 321,728 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2691557A GB910131A (en) | 1957-08-26 | 1957-08-26 | Improvements in or relating to processes for increasing the concentration of nitric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2691557A GB910131A (en) | 1957-08-26 | 1957-08-26 | Improvements in or relating to processes for increasing the concentration of nitric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB910131A true GB910131A (en) | 1962-11-07 |
Family
ID=10251215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2691557A Expired GB910131A (en) | 1957-08-26 | 1957-08-26 | Improvements in or relating to processes for increasing the concentration of nitric acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB910131A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3542510A (en) * | 1968-03-14 | 1970-11-24 | Chemical Construction Corp | Production of highly concentrated nitric acid |
| FR2040436A1 (en) * | 1969-04-30 | 1971-01-22 | Sumitomo Chemical Co | |
| FR2394493A1 (en) * | 1977-06-16 | 1979-01-12 | Boc Ltd | PERFECTED PROCESS FOR MANUFACTURING NITRIC ACID BY GAS-LIQUID CONTACT |
| US4235858A (en) * | 1978-04-07 | 1980-11-25 | Boc Limited | Processes for producing nitric acid by utilization of cold oxygen |
| US4276277A (en) * | 1970-06-12 | 1981-06-30 | Produits Chimiques Ugine Kuhlmann | Manufacture of concentrated nitric acid |
| US4312852A (en) * | 1979-07-27 | 1982-01-26 | Reynolds Metals Company | Nitric acid reconstitution |
-
1957
- 1957-08-26 GB GB2691557A patent/GB910131A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3542510A (en) * | 1968-03-14 | 1970-11-24 | Chemical Construction Corp | Production of highly concentrated nitric acid |
| FR2040436A1 (en) * | 1969-04-30 | 1971-01-22 | Sumitomo Chemical Co | |
| US4276277A (en) * | 1970-06-12 | 1981-06-30 | Produits Chimiques Ugine Kuhlmann | Manufacture of concentrated nitric acid |
| FR2394493A1 (en) * | 1977-06-16 | 1979-01-12 | Boc Ltd | PERFECTED PROCESS FOR MANUFACTURING NITRIC ACID BY GAS-LIQUID CONTACT |
| US4235858A (en) * | 1978-04-07 | 1980-11-25 | Boc Limited | Processes for producing nitric acid by utilization of cold oxygen |
| US4312852A (en) * | 1979-07-27 | 1982-01-26 | Reynolds Metals Company | Nitric acid reconstitution |
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