Selective nitration of aromatic and substituted aromatic compositions
CA 1066308 A · Owner: Air Products And Chemicals · Inventors: Miller, Donald G.; Milligan, Barton
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, This invention relates to an improvement in a process for nitrating an aromatic or substituted aromatic compound e.g. toluene or ortho-xylene by reacting such aromatic or sub-, stituted aromatic in the presence of nitric acid. The improvement for enhancing the rate of nitration as well as the selectivity of nitration at the para-position in this process comprises carrying out the nitration reaction in the presence of at least an effective amount of anhydrous calcium sulfate or soluble anhydrite. -1-
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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 November 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 13, 1996.
- 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.