Description & Specifications
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Commercial Hydrochloric acid is available in the market as 30% aqueous solution, But for certain applications e.g. bulk drug and pharmaceuticals HCl is required in anhydrous state for critical reactions where moisture cannot be tolerated. Such users generate anhydrous HCl from commercial grade for their captive consumption. METHOD Several methods have been adopted by industries, but generation by Sulphuric Acid Route and Boiling Route are commonly practised. We offer Calcium Chloride Route Also. SULPHURIC ACID ROUTE Working Principle : Hydrochloric acid is highly soluble in water but the solubility diminishes in presence of H2SO4 acid. At 70 to 75% H2SO4 concentration its solubility is negligible. Thus by adding (98%) commercial Sulphuric acid to commercial hydrochloric acid (30%) in proper ratio the entire HCl can be liberated in gaseous form leaving 75% H2SO4 as spent acid. Process Outline : Metered quantities of commercial Sulphuric acid and Hydrochloric acid are fed to the unit where they mix in the mixing zone. The gas generated forms a froth and enters the Generation Zone where while travelling through a bed, gas is released which travels upwards through the drying zone. Here the gas comes in intimate contact with downward flow of 98% H2SO4. The dry gas leaving the process through a rota meter. The spent liquor containing 70-75% H2SO4 passes through the cooling zone before being discharged. Salient Features : Operational reliability the unit can be started/stopped in seconds Available in wide range of capacities from  5 to 200 kg/hr of dry HCL. Except cooling water no other utility e.g steam chilled water e.g required. Anhydrous gas. Capable of operating from 25 to 120%. Ease of installation. Negligible pressure drop. High Efficiency 99%
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