Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1988-01-26
1989-06-06
Chan, Nicky
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
07C14360, 260
Patent
active
048369594
ABSTRACT:
The invention relates to a new process for the preparation of 1-aminonaphthalene-2,4,7-trisulphonic acid and 1-aminonaphthalene-7-sulphonic acid (1,7-Cleve's acid), in which 1-aminonaphthalene or naphthionic acid is sulphonated selectively in the presence of certain additives to give 1-aminonaphthalene-2,4,7-trisulphonic acid and this is hydrolyzed to 1,7-Cleve's acid by warming in aqueous sulphuric acid.
REFERENCES:
Donaldson, "The Chemistry and Technology of Naphthalene Compounds", Edward Arnold (Publishers) Ltd., 1958, pp. 198, 209, 218.
Behre Horst
Blank Heinz U.
Marzolph Gerhard
Streicher Willi
Bayer Aktiengsellschaft
Chan Nicky
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