Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Reexamination Certificate
2006-02-09
2008-10-14
Sergent, Rabon (Department: 1796)
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
C564S330000, C564S332000, C564S333000
Reexamination Certificate
active
07435853
ABSTRACT:
Di- and polyamines of the diphenylmethane series are produced bya) converting nitrobenzene and methanol in the presence of a catalyst to aniline, formaldehyde and carbon monoxide, and thenb) converting the aniline and formaldehyde produced in step a) in the presence of an acid catalyst to di- and polyamines of the diphenylmethane series, andc) converting the carbon monoxide produced in step a) with chlorine to phosgene.
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Dugal Markus
Grabowski Stefan
Wolf Aurel
Bayer MaterialScience AG
Brown N. Denise
Listvoyb Gregory
Sergent Rabon
Whalen Lyndanne M.
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