Use of a solid hydrotalcite structure incorporating...

Details Use of a solid hydrotalcite structure incorporating... Use of a solid hydrotalcite structure incorporating...

2006-06-13

2006-06-13

Witherspoon, Sikarl A. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S315000, C568S316000, C568S347000, C568S348000, C568S391000, C568S393000, C564S469000, C560S115000, C560S128000, C560S174000, C558S357000, C558S365000, C558S371000

Reexamination Certificate

active

07060859

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 of Michael condensation reactions. The invention also concerns novel solid basic catalysts comprising a hydrotalcite structure characterized 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.

REFERENCES:
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patent: 6812186 (2004-11-01), Choudary et al.
patent: WO 98/51615 (1998-11-01), None
Choudary et al. The first example of Michael addition catalysed by modified Mg-Al hydrotalcite.□□Jounal of Molecular Catalysis A: Chemical 146 (1999) p. 279-284.
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Parker, L. M. et al., “The Use of Hydrotalcite as an Anion Absorbent”,Industrial&Engineering Chemistry Research, vol. 34, No. 4, Apr. 1, 1995, pp. 1196-1202, XP000494847.
Rousselot, I et al., “Synthesis and Characterization of Mixed Ga/A1-Containing Layered Double Hydrozides: Study of Their Basic Properties Through the Knoevenagel Condensation of Benzaldehyde and Ethyl Cyanoacetate, and Comparison to other LDSs”,International Journal of Inorganic Materials, vol. 1, No. 2, 1999, pp. 165-174, XP000964856.
Miyata, Shigeo, “Anion-Exchange Properties of Hydrotalcite-Like Compounds”,Clays and Clay Minerals, vol. 31, No. 4, 1983, pp. 305-311, XP000964988.

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