Patent ID: 6812186
Filing Date: 2004-11-02
Classification: B01J

Abstract:
A process for the preparation of layered double hydroxide exchanged with diisopropylamide catalyst of formula (1) which is referred to as LDH-diisopropylamide catalyst and represented herein below:[MI and/or MII(1âˆ’x)MIII(x)(OH)2][NCH(CH3)2âˆ’]x/2Â·/zH2O. wherein MI is a monovalent cationMII is a bivalent cation MIII is a trivalent cation x=0.10 to 0.50 z is an integer whose value depends on the ingredients and the reaction conditions used, the said process comprising steps of: (a) reacting layered double hydroxide of general formula (2) [MI and/or MII(1âˆ’x)MIII (x) (OH)2][Anâˆ’]x/2.zH2O with lithium diisopropylamide in an organic solvent under an inert atmosphere of nitrogen at a temperature ranging between 20Â°-30Â° C. for a period of 5 to 24 hours, and (b) filtering the reaction mixture of step (a) to obtain the required layered double hydroxide exchanged with diisopropylamide catalyst of general formula (1), referred to as LDH-diisopropylamide cartalyst.