Peroxoacid manufacture
CA 2094918 A1 · Owner: Lane, John Raoul Grendon · Inventors: Mcdonogh, Colin Frederick; Woods, Stephen Edward; Lane, John Raoul Grendon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Conventional plant to produce peroxomonosulphuric acid (Caro's acid) is large and emphasises extensive cooling so that it is, awkward to transport, can be cumbersome to install beside existing plant and can suffer from relatively expensive capital and/or running costs. In the present invention Caro's acid is generated, continuously in relatively small plant adiabatically by introducing , concentrated hydrogen peroxide (8) into a stream of concentrated sulphuric acid in a reaction chamber (5) dimensioned so that the throughput is very fast. In particularly suitable embodiments the reaction chamber is annular at the points of introduction of the reagents, its width being greater in the …
Read the whole patent
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
- Filed September 24, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.