GB472493A - Improvements in or relating to the concentration of aqueous solutions of nitric acid - Google Patents
Improvements in or relating to the concentration of aqueous solutions of nitric acidInfo
- Publication number
- GB472493A GB472493A GB8670/36A GB867036A GB472493A GB 472493 A GB472493 A GB 472493A GB 8670/36 A GB8670/36 A GB 8670/36A GB 867036 A GB867036 A GB 867036A GB 472493 A GB472493 A GB 472493A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- nitric acid
- concentration
- gas
- tower
- 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 4
- 229910017604 nitric acid Inorganic materials 0.000 title abstract 4
- 239000007864 aqueous solution Substances 0.000 title 1
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 abstract 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 3
- 239000002253 acid Substances 0.000 abstract 3
- 239000001117 sulphuric acid Substances 0.000 abstract 3
- 235000011149 sulphuric acid Nutrition 0.000 abstract 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 150000007513 acids Chemical class 0.000 abstract 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract 1
- 239000012024 dehydrating agents Substances 0.000 abstract 1
- JGJLWPGRMCADHB-UHFFFAOYSA-N hypobromite Inorganic materials Br[O-] JGJLWPGRMCADHB-UHFFFAOYSA-N 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000006396 nitration reaction Methods 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
- C01B21/38—Nitric acid
- C01B21/44—Concentration
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Treating Waste Gases (AREA)
Abstract
<PICT:0472493/III/1> Nitric acid is concentrated in the presence of sulphuric acid by contacting the dilute liquid with gaseous sulphur trioxide. The gas is admitted through an inlet F at the base of a tower A filled with acid-resisting material B over which trickles a mixture of the nitric acid and 101 per cent sulphuric acid both preheated to 110 DEG C. Vapours of nitric acid pass out of the tower through an outlet C to a condenser. Fuming sulphuric acid and sulphur trioxide may both be generated in an oleum still, and the inlet pipes E, F for the acid and gas respectively are connected to the liquid and gas reservoirs of the still. Concentrated residual acid is also obtained. The process may be applied to the denitration of spent nitration acids. U.S.A. Specification 1,031,865 is referred to. The Specification as open to inspection under Sect. 91 refers also to the concentration of bromine water, acetic acid, and hydrochloric acid. Phosphoric acid is specified as an alternative dehydrating agent. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12563A US2139721A (en) | 1935-03-23 | 1935-03-23 | Concentration of nitric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB472493A true GB472493A (en) | 1937-09-23 |
Family
ID=21755552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8670/36A Expired GB472493A (en) | 1935-03-23 | 1936-03-23 | Improvements in or relating to the concentration of aqueous solutions of nitric acid |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2139721A (en) |
| GB (1) | GB472493A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2562240A (en) * | 1944-03-11 | 1951-07-31 | Allied Chem & Dye Corp | Manufacture of oleum |
| US2797145A (en) * | 1953-08-12 | 1957-06-25 | Allied Chem & Dye Corp | Production of anhydrous hydrochloric acid gas from aqueous hydrochloric acid solution |
-
1935
- 1935-03-23 US US12563A patent/US2139721A/en not_active Expired - Lifetime
-
1936
- 1936-03-23 GB GB8670/36A patent/GB472493A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2139721A (en) | 1938-12-13 |
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