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Zawartość zarchiwizowana w dniu 2022-11-21

Avoiding water and acid consumption in chemical scale removal by innovative combined process

Cel

Pickling processes require large amounts of acid and water. So far, a part of the pickling acid has to be discarded as waste in regular intervals. Using a new process combination of freezing crystallisation and precipitation the spent pickling acid can be separated into pure water, metal salt crystals and a solution containing the active acid and a rest of metal salts. The active acid and the pure water can be recycled into the pickling process or the rinsing zone, respectively.

The extracted metal salts can be treated by pryrohydrolysis or electrolysis to recover the bonded acid and to produce metal oxides or elementary metals, respectively.

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BETRIEBSFORSCHUNGSINSTITUT VDEH-INSTITUT FUR ANGEWANDTE FORSCHUNG GMBH
Wkład UE
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Adres
Sohnstrasse 65
40237 DUSSELDORF
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