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I know sulfuric acid is an important catalyzer and is used in various processes. My question is, how do I recover the remaining sulfuric acid? It will be impure, and I don't know how to do the "standard" procedure (is there one?)

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In laboratory, nobody cares. It's too cheap to care about.

In industry, other catalysts are usually used (heterogeneous ones).

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  • $\begingroup$ Of course in industry sulfuric acid is used! In all cases where some washing with water is needed anyway, there is no reason not to use sulfuric or hydrochloric acid. $\endgroup$
    – Georg
    Commented Feb 27, 2013 at 18:02
  • $\begingroup$ @Georg it is another reagent to transport, store, use and dispose. It costs. $\endgroup$
    – permeakra
    Commented Feb 28, 2013 at 4:56

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