Hydrochloric acid regeneration

Treatment of geothermal waters for industrial and agricultural purposes

Published in Jochen Bundschuh, Barbara Tomaszewska, Geothermal Water Management, 2018

Nalan Kabay, Pınar Yanar Sözal, Emre Yavuz, Mithat Yüksel, Ümran Yüksel

ED was also found to be an effective method for separation of strong acids from boric acid. Bialek et al.(2014) proposed ED as a method for hydrochloric acid regeneration from the effluents containing both hydrochloric acid and boric acid. The result obtained was that boric acid transport across the hydrochloric acid was much slower.

Hydrochloric acid regeneration in hydrometallurgical processes: a review

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Journal Information

Published in Mineral Processing and Extractive Metallurgy, 2018

Caitlyn McKinley, Ahmad Ghahreman

Pyrohydrolysis is the only true form of hydrochloric acid regeneration that has been commercialised. Beginning from relatively simple chloride brine, pyrohydrolysis uses a fluidised bed or a spray roaster to remove the water units from the solution to produce a metal oxide and hydrochloric acid as per the following reaction:Pyrohydrolysis is a versatile process, and depending on the operating conditions used, in particular the temperature, one can control the metal chlorides targeted to selectively hydrolyse only certain metal chlorides (de Bakker 2011). Theoretically, pyrohydrolysis may be used to hydrolyse any metal chloride to its metal oxides; however, only three metals, magnesium, ferrous and nickel, have been implemented in an industrial setting.

Hydrochloric acid regeneration

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Treatment of geothermal waters for industrial and agricultural purposes

Hydrochloric acid regeneration in hydrometallurgical processes: a review