Process for the purification of benzaldehyde
CA 1138000 A · Owner: Stamicarbon B.V. · Inventors: Jongsma, Cornelis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for purification of impure benzaldehyde by which purified benzaldehyde is prepared which has improved color stability and improved olfactory characteristics. The process is comprised of the steps of treatment with hydrogen in the presence of a hydrogenation catalyst followed by distillation. The present invention is a new and novel process for the purification of benzaldehyde and is in particular, a unique and novel process for the purification of benzaldehyde prepared by the oxidation of toluene with a gas containing molecular oxygen.
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 21, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 21, 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.