An improved synthesis of N,N,-disubstituted-p-phenylene-diamine (DSPDA) preferably di-n-butyl-p-phenylenediamine is disclosed. The improvement rests on the discovery that DSPDA and its salts are extremely sensitive to oxygen so that once the product DSPDA or its salt is formed, oxygen must be excluded from all manipulations.

Una síntesis mejorada de N, N, di-n-buti'lico-p-di-n-butyl-p-phenylenediamine de la disubstituted-p-phenylene-diamina (DSPDA) se divulga preferiblemente. La mejora se basa sobre el descubrimiento que DSPDA y sus sales son extremadamente sensibles al oxígeno para una vez formar el producto DSPDA o su sal, oxígeno se deben excluir de todas las manipulaciones.

 
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