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HCl Gas Generation Unit (Calcium Chloride Route)

Hydrochloride gas is useful for Several Applications such as Hydrochlorination of Bulk drug to make product water Soluble , also required in an anhydrous state for critical reactions where moisture cannot be tolerated.

Dry Gas is available in Cylinders which was quite costly and found handling problems while passing gas in the reactor .

Several methods have been adopted by industries for HCL Gas Generator. But generation by Sulphuric Acid Route and Boiling Route are commonly practiced. We offer Calcium Chloride Route for HCL Gas Generator.

Hydrochloric acid and water form a maximum boiling point azeotrope at 11O°C corresponding to a concentration of 20.24%; HCl. By adding concentrated CaCl2 solution to commercial hydrochloric acid ;azeotrope point is eliminated and. the entire HCl becomes available for liberation by distillation.


The above principle- is achieved in practice by feeding metered quantities of commercial HCl and CaCl2 -solution to a stripping column with a steam heated reboiler at the bottom. The effluent from a bottom of the column is a dilute acidic calcium chloride solution which is concentrated to desired Concentration in an evaporator and re-used. The vapor leaving is condensed stage wise with cooling water and chilled brine as the coolant. The relatively dry gas passes through a mist eliminator and to the point of consumption.


  • Designed Considering operation and maintenance problem.
  • Proven design that is a combination of different MOC most suitable for its use.
  • Turn down ratio 30%
  • Simple operation makes system operation and maintenance Friendly(Less Pump and Instrumentation)
  • Nearly zero Effluent system which makes payback period fast over other systems considering Higher raw Material costs and handling and neutralization cost of Effluents.
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