Process for obtaining silica from the ash in the nature of the sugar cane bagasse

摘要

The present invention is the production process of silica, MP2, which uses the ash of sugarcane bagasse (in nature).A residue of the sugar and alcohol industry for the production of silicate of alkali metals.It is made of a mixture of the raw material, without any kind of pre - treatment, with an alkaline substance, in the range of 50% to 85% m / m,With subsequent heating to a temperature range between 300 ° C and 700 OC, by the time of 1 to 6.After the dissolution of silicate, is carried out with an inorganic acid acidification to pH between 8 and 10, so there is the precipitation of silica.After the precipitation, filtration is performed for the removal of excess water and thenIt is the drying in the oven at a temperature range of 50 ° C to 120 ° C for a period between 3 and 8.