| abstract |
The invention concerns granular washing and cleaning agents, or a component of such agents, which contain high quantities of surfactants and are manufactured by neutralizing a preparation containing the surfactants in their acid form and subsequent granulation with additional solid materials. Such agents frequently have a poor colour value if the anionic surfactants are pre-bleached in their acid form. Agents with a good colour value are obtained, however, if an acid surfactant preparation containing one or more anionic surfactants in their acid form is (a) neutralized with a stoichiometric amount, or an excess of, a neutralizing agent in an intimate-mixing device, and at the same time as the neutralization, bleached by the addition of a peroxide bleach and (b) granulated together with additional solid materials to obtain a dust-free product and, optionally, simultaneously or subsequently dried. |