Use of a solid hydrotalcite structure incorporating fluorides for basic catalysis of michael or knoevenagel reactions
OwnerFrancois Figueras, Boyapati Manoranjan Choudary +3inventors
InventorsFrancois Figueras, Boyapati Manoranjan Choudary, Mannepalli Lakshimi Kantam, Vattipally Neeraja, Kottapalli Koteswara Rao
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Abstract
The invention concerns the use of a solid basic catalyst comprising a hydrotalcite structure wherein part at least of the compensating anions are fluoride anions F for producing Knoevenagel or Michael condensation reactions. The invention also concerns novel solid basic catalysts comprising a hydrotalcite structure characterised by a Mg/Al molar ratio ranging between 2.5 and 3.8 wherein at least part of the compensating anions are fluoride anions F, and methods for preparing said novel catalysts.
Claims16
Using a solid basic catalyst with a hydrotalcite structure wherein at least some compensation anions are fluoride anions F, for the basic catalysis of Knoevenagel and Michael's condensation reactions.
A solid basic catalyst with a hydrotalcite structure wherein the Mg/Al molar ratio is between 2.5 and 3.8 wherein a part of the compensation anions are fluoride anions F.
A preparation method of a solid basic catalyst according to any of the claims from 6 to 10, wherein the following stages are:
- (11.1) Prepare mixed magnesium and aluminium oxide by hot-process carbonate removal of a carbonatised hydrotalcite structure solid wherein the Mg/Al molar ratio is between 2.5 and 3.8.
- (11.2) Hydrate the mixed oxide of stage (11.1) in the presence of fluoride ions.
Dependencies are inferred from the claim text.