Chemical News

Monday, October 6, 2008

Regeneration of Hydrochloric Acid Pickling Liquors


The PHAR® hydrochloric acid regeneration system is an innovative method of regenerating spent hydrochloric acid from steel pickling. Conventional pickling technology generates 1.5 billion gallons of spent pickle liquor nationwide each year, resulting in costly and energy-intensive handling, treatment, and disposal.

This new technology eliminates the disposal problem, significantly reducing operating, environmental, and capital costs. The process uses sulfuric acid to restore hydrochloric acid for reuse. Salable ferrous sulfate heptahydrate is a by-product.

Source: EERE ITP Program

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