Process for the purification of solutions of alkali metal metaborate of the perborate, alkali metal and to prepare on the basis of these solutions

摘要

Is purified solutions of alkali metal metaborate clarifying by the elimination of the particles in suspension, which have a diameter less than 10 μm and greater than 0,2 μm. / p & & p & the particles in suspension are removed by centrifuging or by microfiltration over membranes. / p & & p & the solutions of metaborate obtained are clear and colourless and can be used for the preparation of the perborate in view of their incorporation in the detergent products.