Process for the separation of sulphuric acid from aqueous mixtures thereof with paraffin-sulphonic acids
CA 1297903 C · Owner: Enichem Augusta S.P.A. · Inventors: Borgarello, Enrico; Franco, Cosimo; Faggian, Lucio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1. CASE 2437, "PROCESS FOR THE SEPARATION OF SULPHURIC ACID FROM AQUEOUS MIXTURES THEREOF WITH PARAFFIN-SULPHONIC ACIDS" Abstract, The mixtures from which sulphuric acid must be separated according to the present invention are those which derive from the sulphoxidation of (C12-C18)-nparaffins with SO2 and O2 in the presence of water and of U.V. light at a temperature comprised within the range of from 25 to 50°C, after the removal of n-paraffins which, separate spontaneously, and of SO2 excess and after, undergoing one of the following treatments: a) dehydration, by known systems of the residual mixture, at least until said mixture becomes cloudy (due to the formation of a biphasic system) …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 2009.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.