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US 6,271,171 B1Granted
Catalyst for obtaining β-hydroxy and/or α,β-unsaturated carbonyl compounds
AssigneeElf Atochem S.A.
InventorsRémy Teissier, Maurice Fournier
Life of this patent
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Abstract
The present invention relates to a process for obtaining a solid catalyst of general formula (I): [(Mg2+)1−x(Al3+)x(OH−)2]x+[(OH−)x]x−(H2O)n (I) with 0.20≦x≦0.33 and n<1.
Claims24
A process for preparing a catalyst for obtaining β-hydroxy and/or α,β-unsaturated carbonyl compounds from at least one aldehyde or at least one ketone, provided that the β-hydroxy carbonyl compound is not diacetone alcohol, comprising:
- calcining hydrotalcite to form a double oxide comprising Mg1−xAlxO1+x,
- hydrating the double oxide in the absence of CO2 to form a hydrated double oxide of general formula (I):
- [(Mg2+)1−x(Al3+)x(OH−)2]x+[(OH−)x]x−(H2O)n (I)
- wherein 0.20≦x≦0.33 and n<1, and
- rinsing the hydrated double oxide with a water-miscible solvent.
2 more elements
Dependencies are inferred from the claim text.