Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1978-04-20
1980-06-03
Douglas, Winston A.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260684, C07C 4968
Patent
active
042061300
ABSTRACT:
A process has been invented for the preparation of 1,5-dichloroanthraquinone which comprises reacting 1,5-dichloroanthraquinone with chlorine in the presence of at least 50% by weight of liquid phthalic anhydride, relative to the weight of 1,5-dinitroanthraquinone employed. The 1,5-dichloroanthraquinone is known to be a valuable starting material for the preparation of various dyestuffs.
REFERENCES:
patent: 1969044 (1934-08-01), Shaw et al.
patent: 4006171 (1977-02-01), Majer et al.
Herzog Helmut
Hohmann Walter
Seidler Helmut
Bayer Aktiengesellschaft
Covington Raymond K.
Douglas Winston A.
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