Organic compounds -- part of the class 532-570 series – Organic compounds – Nitriles
Reexamination Certificate
2006-08-01
2006-08-01
Saeed, Kamal A. (Department: 1626)
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitriles
Reexamination Certificate
active
07084294
ABSTRACT:
A process for the recovery of a Lewis acid from a reaction mixture (I) which has been obtained in the hydrocyanation of an olefinically unsaturated compound to a nitrile which has a miscibility gap with water under certain pressure and temperature conditions, in the presence of a catalyst system comprising a Lewis acid and a complex compound. The method comprisesa) removing the complex compound from mixture (I) to give a mixture (II),b) adding water to mixture (II) and placing mixture (II) under pressure and temperature conditions to provide a phase (III) and a phase (IV),c) adding a liquid diluent (V) whichc1) does not form an azeotrope with water and whose boiling point under certain pressure conditions is higher than that of water, orc2) forms an azeotrope or heteroazeotrope with water under certain pressure conditions, to phase (III),d) subjecting the mixture of phase (III) and liquid diluent (V) to distillation under the pressure conditions mentioned in step c1) or c2), ande) subjecting mixture (VII) to hydrocyanation of an olefinically unsaturated compound to give the nitrile.
REFERENCES:
patent: 3773809 (1973-11-01), Walter et al.
patent: 4082811 (1978-04-01), Shook, Jr.
patent: 4082881 (1978-04-01), Chen et al.
patent: 4705881 (1987-11-01), Rapoport
patent: 6048996 (2000-04-01), Clarkson et al.
patent: 6127567 (2000-10-01), Garner et al.
patent: 6171996 (2001-01-01), Garner et al.
patent: 6380421 (2002-04-01), Lu et al.
patent: 2002/0022736 (2002-02-01), Burattin et al.
patent: 0 417 325 (1991-03-01), None
patent: WO 96/33969 (1996-10-01), None
International Search Report for International Application No. PCT/EP 03/07150.
Bartsch Michael
Baumann Robert
Haderlein Gerd
Jungkamp Tim
Luyken Hermann
BASF - Aktiengesellschaft
Connolly Bove & Lodge & Hutz LLP
Kosack Joseph R.
Saeed Kamal A.
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