| 摘要 |
The process for the preparation of auramine and ethyl auramine by the reaction of 4,4'-tetramethyldiaminodiphenyl methane and 4,4'-tetraethyldiaminodiphenyl methane, respectively with sulfur, ammonium chloride and ammonia gas is improved by carrying out the reaction in the presence of a solvent selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol and glycerol at a temperature of from about 125 DEG C. to about 175 DEG C.
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