Process for producing hydroxybenzenes
CA 1308122 C · Owner: Miki, Hisaya · Inventors: Nitabaru, Masatoshi; Araki, Shintarou; Miki, Hisaya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hydroxybenzenes can be produced in high yield through a one-step reaction by subjecting (a) an .alpha. .alpha.-dialkyl-.alpha.hydroxymethyl group containing benzene and/or (b) a benzene containing both .alpha. .alpha.-dialkyl-.alpha.-hydroxymethyl and .alpha. .alpha.-dialkyl-.alpha.-hydroperoxymethyl groups to reaction in the presence of a nitrile, an acid and hydrogen peroxide. In a preferred mode, the reaction system further contains (c) an .alpha. .alpha.-dialkyl-.alpha.-hydroperoxymethyl group containing benzene.
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 September 29, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 2009.
- 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.