摘要:
Aminonaphthalene derivatives are prepared by reacting the corresponding naphthol derivative with ammonia or amines in the presence of bisulfites. The reaction is carried out in a continuous procedure in reaction apparatus which consists wholly or partly of titanium or a titanium alloy, carbon largely excluded. Suitable alloys are titanium/palladium, titanium/nickel or titanium/molybdenum.
摘要:
Tetramethylethylenediamine is prepared by reacting 1,2-dichloroethane with an excess of dimethylamine at elevated temperatures and pressures. The process is carried out continuously in the presence of water and the amines in the reaction product are liberated by treatment with bases. Unconverted dimethylamine is separated and treated with water and then recycled into the reaction.
摘要:
Polyethylene-polyamine salts of low viscosity and high retention action, are prepared by subjecting polyethylene-polyamine salts of higher viscosity to a thermal degradation by heating their aqueous solutions in closed reaction vessels to temperatures of 100.degree. to 180.degree. C under pressures of 2 to 10 atmospheres.