GB1419645A - Production of strong nitric acid - Google Patents
Production of strong nitric acidInfo
- Publication number
- GB1419645A GB1419645A GB2312873A GB2312873A GB1419645A GB 1419645 A GB1419645 A GB 1419645A GB 2312873 A GB2312873 A GB 2312873A GB 2312873 A GB2312873 A GB 2312873A GB 1419645 A GB1419645 A GB 1419645A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hno
- concn
- pressure
- bottoms
- produce
- 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
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 title abstract 2
- 229910017604 nitric acid Inorganic materials 0.000 title abstract 2
- 230000003647 oxidation Effects 0.000 abstract 3
- 238000007254 oxidation reaction Methods 0.000 abstract 3
- 239000002253 acid Substances 0.000 abstract 2
- 230000003197 catalytic effect Effects 0.000 abstract 2
- 238000004821 distillation Methods 0.000 abstract 2
- 230000008016 vaporization Effects 0.000 abstract 2
- 238000004061 bleaching Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000009834 vaporization Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
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
1419645 Strong nitric acid E I DU PONT DE NEMOURS & CO 15 May 1973 23128/73 Heading C1A HNO 3 of concn. of at least 90% by wt., e.g. up to 100%, is prepared by continuously (a) absorbing gaseous an equilibrium NO 2 /N 2 O 4 mixture in aq. HNO 3 to form 75-85% by wt. HNO 3 , (b) reacting the HNO 3 with O 2 and H 2 O at elevated pressure to form 80-90% by wt. HNO 3 , (c) vaporizing part of the N 2 O 4 and then (d) distilling the acid to produce the strong acid. Step (a) may be carried out at a pressure of 80-120 p.s.i.g. and a temp. of 0-25‹ C. to produce the 75-85% HNO 3 containing 15-30% dissolved N 2 O 4 . Step (b) may be performed at a pressure of 300-1600 p.s.i.g. and a temp. of 40-100‹ C. The vaporization step (c) may be by depressurization to 105-155 p.s.i.g. or by bleaching with air, thereby removing 50% of the N 2 O 4 . The distillation step (d) may be operated at atm. pressure. The N 2 O 4 -containing gaseous effluent from step (a) may be scrubbed in weak HNO 3 or water to produce a weak HNO 3 which on distillation gives a distillate of concn. less than 5% HNO 3 and bottoms of concn. 55-68À5% HNO 3 , the bottoms being used as an H 2 O source in step (b). The N 2 O 4 may be obtained by the catalytic oxidation of NH 3 and oxidation of the NO formed. The cooled and separated H 2 O from the catalytic oxidation having a concn. of 35-55% HNO 3 may be distilled to give distillate of concn. <5% HNO 3 and bottoms of concn. 55-68%, one or both fractions being used as a source of H 2 O for step (b).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2312873A GB1419645A (en) | 1973-05-15 | 1973-05-15 | Production of strong nitric acid |
| FR7321022A FR2232509B1 (en) | 1973-05-15 | 1973-06-08 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2312873A GB1419645A (en) | 1973-05-15 | 1973-05-15 | Production of strong nitric acid |
| FR7321022A FR2232509B1 (en) | 1973-05-15 | 1973-06-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1419645A true GB1419645A (en) | 1975-12-31 |
Family
ID=26217763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2312873A Expired GB1419645A (en) | 1973-05-15 | 1973-05-15 | Production of strong nitric acid |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2232509B1 (en) |
| GB (1) | GB1419645A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0384565A1 (en) * | 1989-01-26 | 1990-08-29 | Beco Engineering Company | Treatment of nitrogen oxides |
| CN113683067A (en) * | 2021-08-17 | 2021-11-23 | 韩玉芹 | System is prepared to industry nitric acid |
| CN115477287A (en) * | 2022-10-17 | 2022-12-16 | 中核四0四有限公司 | Nitric acid recovery system and method in a uranium purification process |
-
1973
- 1973-05-15 GB GB2312873A patent/GB1419645A/en not_active Expired
- 1973-06-08 FR FR7321022A patent/FR2232509B1/fr not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0384565A1 (en) * | 1989-01-26 | 1990-08-29 | Beco Engineering Company | Treatment of nitrogen oxides |
| CN113683067A (en) * | 2021-08-17 | 2021-11-23 | 韩玉芹 | System is prepared to industry nitric acid |
| CN115477287A (en) * | 2022-10-17 | 2022-12-16 | 中核四0四有限公司 | Nitric acid recovery system and method in a uranium purification process |
| CN115477287B (en) * | 2022-10-17 | 2023-09-26 | 中核四0四有限公司 | Nitric acid recovery system and method in uranium purification process |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2232509B1 (en) | 1979-09-28 |
| FR2232509A1 (en) | 1975-01-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1489856A (en) | Process for the preparation of propylene oxide | |
| US4262140A (en) | Production of anhydrous or substantially anhydrous formic acid | |
| ES334975A1 (en) | Ammonia purification | |
| US4079068A (en) | Manufacture of tetrahydrofuran from the diacetate of 1,4-butanediol | |
| GB1419645A (en) | Production of strong nitric acid | |
| GB903682A (en) | An improved method for the manufacture of chlorine by the oxidation of hydrochloric acid | |
| GB777087A (en) | Improvements in or relating to the oxidation of cyclohexane | |
| GB1283619A (en) | Process for purifying propylene oxide | |
| DE2519295C3 (en) | Process for the continuous production of organic solutions of percarboxylic acids containing 1 to 4 carbon atoms | |
| GB1516745A (en) | Process for the production of nitric acid | |
| US2678298A (en) | Extractive distillation of hydrazine with a glycol | |
| GB1165278A (en) | Separation of Dimethylacetamide from Mixtures by Distillation | |
| DE1103922B (en) | Process for the preparation of ª‰-chloroethanephosphonic acid dichloride | |
| GB1502190A (en) | Methanol synthesis gas production | |
| DE1210796B (en) | Process for the production of ethylene | |
| GB778966A (en) | Recovery of hydrogen peroxide by fractional distillation of the products of the oxidation of alcohols | |
| GB590439A (en) | Improvements in and relating to the concentration and purification of hydrogen peroxide by distillation | |
| DE854513C (en) | Process for the production of vinyl acetylene | |
| GB834594A (en) | Preparation of perchloryl fluoride | |
| SU431154A1 (en) | METHOD OF CLEANING WODNB1X FORMALDEHYDE SOLUTIONS | |
| SU437269A1 (en) | The method of separation of acetic acid from an aqueous solution | |
| AT232491B (en) | Process for the production of adipic acid and nitrocyclohexane from cyclohexane | |
| GB975324A (en) | Concentrating nitric acid | |
| AT212276B (en) | Process for the continuous production of chlorine dioxide | |
| US3621050A (en) | Method for producing a peroxynitrate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |