Conversion of extraction residues originating from phosphoric acid decontamination to solid deposition products
CA 1136830 A · Owner: Hoechst Aktiengesellschaft · Inventors: Gradl, Reinhard; Schrodter, Klaus; Ehlers, Klaus-Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process permitting raffinates which are obtained in the decontamination of phosphoric acid by extraction with a solvent, to be converted to solid deposition products, wherein the raffinates are admixed with a quantity of water necessary for them to ensure after, reaction with hydrate of lime or quicklime the formation, of an aquious filterable suspension. More particularly the, raffinates are admixed with a quantity of hydrate of lime or quicklime necessary for them to ensure after reaction, and filtration of the suspension the formation of a filter, cake having a pH-value within the range 9 to 14. The reaction suspension is filtered as soon as it has assumed a …
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
- Granted December 7, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 7, 1999.
- 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.