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Chem Resist has developed a flash distillation process that separates recoverable hydrochloric acid, metal salts and waste water.

In the evaporator loop, the spent acid begins to evaporate at approximately 102C.

As the solution increases in concentration, the temperature increases in the loop.

When the proper solution temperature/concentration is reached, a ferrous chloride concentrate is withdrawn slowly from the loop and transferred to a storage tank for sale as a solution or for conversion into a solid crystal.

Forced by expansion, the acid and water vapours are driven from the separator and into the rectifier.

The concentration of acid is controlled in this step to return quality acid to the pickling process.

The remaining water vapour, stripped of acid, continues its journey into the condenser where it is sub-cooled and condensed to nearly pure water.

This water is reused as rinse water in the pickling process or is returned to the pickling tank with the concentrated acid from a stock tank.

The recovery process stabilises the acid concentration in the pickling bath resulting in superior quality end products, claims Chem Resist.

Chem Resist

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