Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1993-03-05
1998-11-24
Kumar, Shailendra
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
564160, 564215, C07C23303
Patent
active
058409785
ABSTRACT:
This invention describes an integrated process for making ethylidene bisformamide in high yield wherein water, which is formed as a reaction by-product, is readily removed from the reaction product mixture without adversely affecting the efficiency of the overall process. The process contemplates isolating the reaction zone from the separation zone and comprises circulating a stream of formamide through a reaction zone containing a solid acidic catalyst and a separation zone; introducing acetaldehyde into the circulating stream of formamide to form a reaction mixture and contacting the reaction mixture with the solid acidic catalyst under reaction conditions sufficient to form a product mixture comprising ethylidene bisformamide and water; and separating water from the product mixture in the separation zone to form a water-depleted product mixture containing ethylidene bisformamide.
REFERENCES:
patent: 4176136 (1979-11-01), Brenzel
patent: 4490557 (1984-12-01), Dawson et al.
patent: 4906777 (1990-03-01), Pinschmidt et al.
Nordquist Andrew Francis
Petrocelli Francis Peter
Pinschmidt, Jr. Robert Krantz
Tsui Yin Pang
Air Products and Chemicals Inc.
Gourley Keith D.
Kumar Shailendra
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