Abstract: The invention relates to a double-layered compacted solid water-purification product, comprising at least one first layer and at least one second layer, characterized in that the first layer comprises at least one flocculating system and at least one dispersion system, the second layer comprises at least one disinfectant which liberates free chlorine on contact with water and at least one excipient for the disinfectant, whereby said excipient releases the disinfectant into the water at a controlled rate such that the combination of excipient and disinfectant releases 0.1 to 100 mg/l of free chlorine per hour. The invention further relates to the method for production of such a product.

Abstract: The invention relates to a double-layered compacted solid water-purification product, comprising at least one first layer and at least one second layer, characterized in that the first layer comprises at least one flocculating system and at least one dispersion system, the second layer comprises at least one disinfectant which liberates free chlorine on contact with water and at least one excipient for the disinfectant, whereby said excipient releases the disinfectant into the water at a controlled rate such that the combination of excipient and disinfectant releases 0.1 to 100 mg/l of free chlorine per hour. The invention further relates to the method for production of such a product.

Abstract: Detergent tablet comprising two layers reactive during dissolution, separated by a barrier layer The present invention relates to a detergent tablet consisting of at least three separate layers, two outer layers being separated by a middle layer, wherein: (i) the first outer layer comprises at least a first compound—detergent agent and/or bleaching agent—which can react chemically with at least a second compound—detergent agent and/or bleaching activator—contained in the second outer layer, and (ii) the middle layer is chemically neutral toward the compounds of the outer layers, and (iii) the compounds of the outer layers react with each other when the tablet is immersed in aqueous medium to form at least a third compound with enhanced detergent and/or bleaching properties.