By blending Hydrochloride and Water perfectly, the resulted mixture is Aqueous Hydrochloric Acid. Being highly soluble in water (Aq), up to 30% Hydrochloric acid is available in strength at 250c.
Metal Processing industry is amongst the the largest application segments of Hydrochloric acids where it acids are generated in diluted format. To cut costs due to environment and neutralization, recycling of Hydrochloric acid is necessary.
By offering best-in-class Hydrochloric Acid Concentration plants, Super Industrial Lining P. Limited provides quality solutions for this problem. Appropriate material and technology for construction depends upon capacity.
A maximum azeotrope is displayed by Hydrogen chloride/ water at a boiling temperature of 108.6°C, for an HCl concentration of 20.2wt% and a system pressure of 1 bar.
In case the concentration of acid is lower than azeotrope mixture, it can be only be concentrated up to the azeotrope point. Special procedures are needed for further concentration. The most economical technology “Azeotropic distillation & Absorption Technology” which is contemporary is used in this purpose.
The azeotrope point is suppressed as best as increases and possible the relative volatility of HCl.
By any change in activities of coefficients, the relative volatility of the end product may be impacted. Usage of a third ingredient which displays strong hygroscopic properties and knocks out water, may help in achieving this.
Conc. HCl & HCL gas is produced at the head of the Absorption column and Azeotropic distillation as per the choice of an appropriate extraction agent.
The extraction agent, in the column, is diluted with water, which is further extracted from the inflowing mixture in a selective fashion. The extractive agent is then concentrated, recycled and fed into the Azeotrope Distillation process.
Aqueous solutions of CaCl2 and Sulphuric acid are appropriate extraction agents for the concentration of hydrochloric acid.