Method for producing basic products for use as e.g. alkalizing agent (soda lye substitute), for ground stabilization or as filler/pigment

Abstract

A method for producing basic products from ashes, minerals, organic solids and other solids, including the provision of a starting material in particle form, mixing the starting material with an additive for synthesis and crushing the particles of the starting material, with a modification of the particles by the supplied additives for synthesis taking place directly during crushing, such that the energy-efficient production of a basic product with a defined particle size and high reactivity is effected and the produced basic products can be used directly for further product production, e.g. as alkalizing agent, for ground stabilization or as filler/pigments.

1 . A method for producing basic products, comprising the following steps:
 i. providing the starting material in particle form,   ii. mixing the particles of the starting material with at least one additive for synthesis, and   iii. crushing the particles of the starting material, a modification of the particles by the added additives for synthesis taking place directly during crushing.   
     
     
         2 . The method according to  claim 1 , in which the produced basic product has an average particle size of 0.01 to 50 μm, in particular 0.05 to 50 μm. 
     
     
         3 . The method according to  claims 1  and  2 , in which the basic product is directly used as product, in particular for ground stabilization, as alkalizing agent, as soda lye substitute, as adsorption agent and/or as filler/pigment. 
     
     
         4 . The method according to one of  claims 1  to  3 , in which the starting material provided in step (i) is subjected to a pre-treatment in which the particles of the starting material are crushed and/or are separated into at least two fractions with different average particle sizes. 
     
     
         5 . The method according to  claim 4 , in which to provide the starting material the crushing of the particles of the starting material is carried out by pressure waves in the pre-treatment. 
     
     
         6 . The method according to  claims 4  and  5 , in which to provide the starting material the separation into at least a first fraction with an average particle size in the range from 0.1 to 8 μm and a second fraction with an average particle size in the range from 8 to 100 μm is carried out, and the at least two fractions are provided, independent of each other, as starting material in step (i). 
     
     
         7 . The method according to  claims 1  to  6 , in which the particles of the starting material in step (i) are provided in an aqueous slurry. 
     
     
         8 . The method according to one of  claims 1  to  7 , wherein the additive for synthesis, which is mixed with the starting material in step (ii), comprises one or more components selected from gases, aerosols, liquids and solids which comprise carbon dioxide, hydrogen fluoride, hydrogen carbonate, hydrogen bicarbonate, alkylalkoxysilanes or a mixture thereof. 
     
     
         9 . The method according to one of  claims 1  to  8 , wherein in at least one of the steps (i) to (iii) one or more additives selected from citric acid, polyacrylates, polyphosphates, polycarbonates, alcohols, in particular ethanol, isopropanols, alkoxypropanols, ketones, in particular acetone, amines, in particular triethylamine, silanes and siloxanes in benzine or isoparrafin, sulfuric acid, sulfates, in particular lignosulfates, alums, in particular aluminium sulfate, phosphoric acid, phosphates, soluble metallic salts, calcium oxide, calcium hydroxide and magnesium oxide are added. 
     
     
         10 . A dispersion produced by dispersing the basic product produced according to the method according to one of  claims 1  to  9  in a dispersing medium.