SPRAY-DRIED BASE DETERGENT PARTICLE GIVING RISE TO A LOW PH IN THE WASH

The present invention relates to a process for preparing a spray-dried laundry detergent particle, wherein the process comprises the step of contacting zeolite to monomeric organic carboxylic acid in an aqueous mixture, wherein the aqueous mixture has a pH of 4.2 or less, wherein the aqueous mixture comprises detersive surfactant, wherein the aqueous mixture is substantially free of silicate salt, and wherein the aqueous mixture is substantially free of carbonate salt, wherein the zeolite reacts with the monomeric organic carboxylic acid to form silica, wherein the aqueous mixture is spray-dried to form a spray-dried laundry detergent particle, wherein the particle comprises: detersive surfactant; monomeric organic carboxylic acid; and silica, wherein the particle is substantially free of silicate salt, and wherein the particle is substantially free of carbonate salt.