Spent acid is produced in the process of manufacturing LABSA. The concentration of Spent Acid produced is about 75% as H2SO4. It is a powerful acidic oxidizer and in liquid state.
Application:
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Spent Acid is mainly used for manufacture of various fertilizers like SSP (Single Super Phosphate), DCP (Di Calcium Phosphate)
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It is used in manufacturing of various Industrial Chemicals like Alum (Ferrous Sulphate) & Dyes & Pigments
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It is also used in neutralizing Alkaline effluent in the E.T.P. Plants of Textile Processing Industries for re-cycling of water
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It is also used in extraction of Lining precipitate from the Black Liquor generated in processing of pulp of paper
Chemical Composition Of Spent Acid (% By Weight):
| Test | Test Value |
| Sulphuric Acid (as H2SO4) | 75 ± 1% |
| Iron (Fe) | 0.01 |
| Copper | Less than 0.0001 |
| Zinc | Less than 0.0001 |
| Lead | 0.001 |
| Nitrate | Less than 0.0002 |
| Nitrite/ Ammonia | 0.002 |
| Chloride | Less than 0.0005 |
| Arsenic | Less than 0.00001 |
| Selenium | 0.002 |
| Manganese | Less than 0.0001 |
| Residue on Ignition | 0.026 |
| Organic Matter | 0.01 |
| Ammonia | 0.00007 |
| Water Content | 24.50 |
