Abstract: The dry waste paper is directly fed in a disintegrator, functioning with a pulp consistency, at the disintegrator outlet, of between 20 and 50%, where it is disintegrated in the presence of an aqueous phase and at least one bleaching agent.

Abstract: Waste paper containing encapsulated constituents such as inks is bleached by pulping it in the presence of an aqueous alkaline solution which contains a peroxide compound such as hydrogen peroxide.

Abstract: A process for the reclamation of waste paper in the presence of an aqueous alkaline solution comprises having the solution contain at least a carboxylated polymer.

Abstract: Process for reclaiming waste paper without deinking which involves pulping the waste paper in the presence of soft water and then adding to the pulp thus obtained a compound capable of liberating, in aqueous solution, ions with a positive charge equal to or greater than 2.

Abstract: Diaphragms for a cell, in which the electrolysis of an aqueous solution of an alkali metal is carried out, having good permeability, shape and dimensional stability and good wettability characteristics with respect to the electrolyte are disclosed as well as a method for the manufacture thereof. The diaphragms are composed of a mixed sheet of a substantially homogeneous mixture of amphibole asbestos fibers and polyvinylidene fluoride fibrils connected together. To manufacture the diaphragms, an intimate mixture of polyvinylidene fluoride fibrils and amphibole asbestos is formed into a sheet and the sheet is heated to cause surface fusion of the fibrils.