Production of chlorine dioxide
CA 1078139 A · Owner: Hooker Chemicals And Plastics Corp. · Inventors: Fuller, Willard A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mixture containing chlorine dioxide chlorine and, alkali metal salt is continuously generated; in the process an alkali metal chlorate, an alkali metal chloride and a strong mineral acid comprising sulfuric acid are continuously reacted in a single vessel generator-evaporator-crystallizer in proportions to generated chlorine dioxide and chlorine in the, absence of a catalyst; the acidity of the reaction solution is maintained within the range of from above 4 to about 11; and the reaction solution is subjected to a vacuum to effect evaporation of water vapor; chlorine dioxide and chlorine are withdrawn in admixture with the water vapor and alkali metal salt of the mineral acid is …
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 May 27, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 27, 1997.
- 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.