Extraction method
AssigneeChematur Ecoplanning Oy
InventorsLasse Parvinen, Jukka Salli
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Abstract
An extraction method is disclosed, where organic impurities are removed from a phase essentially containing sulfuric acid, by means of supercritical or liquid carbon dioxide. In particular, the spent sulfuric acid from a process for production of alkylate fuel may be regenerated for re-introduction into the process without incineration.
Claims6
A method for removal of organic impurities from a liquid phase by extraction using an extracting phase, wherein a sulfuric acid concentration of said liquid phase is at least about 70% by weight, and the extracting phase comprises carbon dioxide in a supercritical or liquid state.
Dependencies are inferred from the claim text.