Organic compounds -- part of the class 532-570 series – Organic compounds – Nitriles
Reexamination Certificate
2005-01-27
2009-06-02
Saeed, Kamal A (Department: 1626)
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitriles
C558S303000, C558S332000, C558S435000, C558S462000, C558S463000
Reexamination Certificate
active
07541486
ABSTRACT:
A process is described for preparing 3-pentenenitrile, characterized by the following process steps:(a) reacting 1,3-butadiene with hydrogen cyanide over at least one catalyst to obtain a stream1which comprises 3-pentenenitrile, 2-methyl-3-butenenitrile, the at least one catalyst and 1,3-butadiene,(b) distilling stream1in a column to obtain a high-1,3-butadiene stream2as the top product and a low-1,3-butadiene stream3as the bottom product which comprises 3-pentenenitrile, the at least one catalyst and 2-methyl-3-butenenitrile,(c) distilling stream3in a column to obtain a stream4as the top product which comprises 1,3-butadiene, a stream5which comprises 3-pentenenitrile and 2-methyl-3-butenenitrile at a side draw of the column, and a stream6as the bottom product which comprises the at least one catalyst,(d) distilling stream5to obtain a stream7as the top product which comprises 2-methyl-3-butenenitrile, and a stream8as the bottom product which comprises 3-pentenenitrile.
REFERENCES:
patent: 3496215 (1970-02-01), Drinkard et al.
patent: 3773809 (1973-11-01), Walter
patent: 4810815 (1989-03-01), Bryndza
patent: 5693843 (1997-12-01), Breikss et al.
patent: 5696280 (1997-12-01), Shapiro
patent: 5821378 (1998-10-01), Foo et al.
patent: 5981772 (1999-11-01), Foo et al.
patent: 6197992 (2001-03-01), Fischer et al.
patent: 7439381 (2008-10-01), Jungkamp et al.
patent: 196 52 273 (1998-06-01), None
Tolman et al., “Homogeneous Nickel-Catalyzed Olefin Hydrocyanation”, Advances in Catalysis 33 (1985), pp. 1-46.
Keese, R. et al., “Distillation”, Fundamentals of Preparative Organic Chemistry (1982), pp. 26-33.
Bartsch Michael
Baumann Robert
Haderlein Gerd
Jungkamp Tim
Luyken Hermann
BASF - Aktiengesellschaft
Connolly Bove Lodge & Hutz
Saeed Kamal A
Shterengarts Samantha L
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