C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/577.5, 260/5
C07C 49/403 (2006.01) C07C 45/45 (2006.01) C07C 49/76 (2006.01)
Patent
CA 1123456
Abstract Or the disclosure: Cyclohexane-1,3-diones are prepared by reacting ?-ketocarboxylic acid esters in the gaseous phase at a temperature Or from 250°C to 500°C at a catalyst. The catalyst contains at least one element of groups III B or IV B of the Periodic System in the form of a compound. Particularly preferred catalysts are thorium compounds on charcoal carriers.
329420
Hey Hansjorg
Mack Karl E.
Muller Werner H.
Hoechst Aktiengesellschaft
Rogers & Bereskin
LandOfFree
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