GB672723A - Improvements in or relating to the removal of carbonaceous materials from sulphuric acid - Google Patents
Improvements in or relating to the removal of carbonaceous materials from sulphuric acidInfo
- Publication number
- GB672723A GB672723A GB1899649A GB1899649A GB672723A GB 672723 A GB672723 A GB 672723A GB 1899649 A GB1899649 A GB 1899649A GB 1899649 A GB1899649 A GB 1899649A GB 672723 A GB672723 A GB 672723A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- nitric acid
- column
- passed
- air
- 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
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/90—Separation; Purification
- C01B17/92—Recovery from acid tar or the like, e.g. alkylation acids
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
Carbonaceous material is removed from sulphuric acid used for treatment of hydrocarbons by continuously countercurrently contacting the spent acid in an oxidising zone with air and nitric acid or any oxide of nitrogen other than N2O, the air being employed in sufficient quantity to provide free oxygen in the gaseous effluent, and passing the effluent comprising free oxygen, at least one oxide of nitrogen and water vapour to a cooling zone where nitric acid is formed, separating the nitric acid from the residual effluent and employing the nitric acid or nitrogen oxides obtained therefrom for the treatment of further spent acid, which has been concentrated to at least 70 per cent by weight, is passed into the top of a column maintained at 100-230 DEG C. The acid from the base of the column may be passed continuously through a second stripping column against a current of air for removal of dissolved nitric acid and nitrogen oxides and the resultant gas mixture is passed to the first column. The condensation of the nitric acid may be carried out in the presence of sulphuric acid, which may be obtained from the base of the stripping column, and the resulting mixed acid contacted with the spent acid or passed to the top of the stripping column.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1899649A GB672723A (en) | 1949-07-19 | 1949-07-19 | Improvements in or relating to the removal of carbonaceous materials from sulphuric acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1899649A GB672723A (en) | 1949-07-19 | 1949-07-19 | Improvements in or relating to the removal of carbonaceous materials from sulphuric acid |
Publications (1)
Publication Number | Publication Date |
---|---|
GB672723A true GB672723A (en) | 1952-05-28 |
Family
ID=10121995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1899649A Expired GB672723A (en) | 1949-07-19 | 1949-07-19 | Improvements in or relating to the removal of carbonaceous materials from sulphuric acid |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB672723A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2955920A (en) * | 1955-10-14 | 1960-10-11 | Nat Distillers Chem Corp | Decarbonization of spent acids |
FR2493823A1 (en) * | 1980-11-13 | 1982-05-14 | Ugine Kuhlmann | PURIFICATION OF RESIDUAL SULFURIC ACIDS FROM ALCOHOL SYNTHESIS |
DE102005049084A1 (en) * | 2005-10-13 | 2007-04-26 | Wacker Chemie Ag | Process for the regeneration of sulfuric acid |
-
1949
- 1949-07-19 GB GB1899649A patent/GB672723A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2955920A (en) * | 1955-10-14 | 1960-10-11 | Nat Distillers Chem Corp | Decarbonization of spent acids |
FR2493823A1 (en) * | 1980-11-13 | 1982-05-14 | Ugine Kuhlmann | PURIFICATION OF RESIDUAL SULFURIC ACIDS FROM ALCOHOL SYNTHESIS |
EP0052548A1 (en) * | 1980-11-13 | 1982-05-26 | Elf Atochem S.A. | Purification of residual sulphuric acids from alcoholic synthesis |
DE102005049084A1 (en) * | 2005-10-13 | 2007-04-26 | Wacker Chemie Ag | Process for the regeneration of sulfuric acid |
US7842272B2 (en) | 2005-10-13 | 2010-11-30 | Wacker Chemie Ag | Process for the regeneration of sulfuric acid |
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