Recovery of sulphuric acid

Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing

Reexamination Certificate

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Details

C423S525000, C423S531000, C210S641000, C210S651000, C210S749000, C210S767000, C127S001000, C127S036000, C127S037000

Reexamination Certificate

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07442359

ABSTRACT:
The invention is directed to a process for the recovery of sulphuric acid from a mixture comprising sulphuric acid and hydrocarbons, in particular carbohydrates. In accordance with the present invention the mixture comprising sulphuric acid and carbohydrates, is contacted with an anion selective membrane, thus producing a sulphuric acid rich filtrate stream and a stream depleted in sulphuric acid.

REFERENCES:
patent: 2276210 (1942-03-01), Lane et al.
patent: 3244620 (1966-04-01), Hansen et al.
patent: 4608245 (1986-08-01), Gaddy et al.
patent: 5562777 (1996-10-01), Farone et al.
patent: 5580389 (1996-12-01), Farone et al.
patent: 6432276 (2002-08-01), Lightner
patent: 6692578 (2004-02-01), Schmidt et al.
patent: 2004/0222157 (2004-11-01), Minhas et al.
patent: 2008/0041366 (2008-02-01), Wahnon

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