A method for obtaining a secondary raw material from a processed product, the secondary raw material containing or consisting of a rare earth metal, a noble metal, a nickel group metal, a boron group metal or metalloid, or a carbon group metal or metalloid, comprising: providing a mixture containing the secondary raw material and being formed on the basis of the processed product; bringing together a mineral-containing material in the form of slurry, pellets or granules and the mixture containing the secondary raw material to adsorb the secondary raw material onto the mineral-containing material, wherein the mineral-containing material contains or consists of a natural clay mixture, a synthetic clay mineral, a zeolite group mineral and/or a hydrargillite diaspore group mineral; bringing together a desorption solution, which is or contains a pure or dilute acid, and the mineral-containing material including the adsorbed secondary raw material to desorb the secondary raw material from the mineral-containing material, wherein two secondary raw materials are adsorbed on the mineral-containing material, and wherein the bringing together of a desorption solution and the mineral-containing material including the adsorbed secondary raw material comprises: bringing together the mineral-containing material and a first desorption solution having a first pH value to desorb the first of the secondary raw materials; and bringing together the mineral-containing material and a second desorption solution having a second pH value to desorb the second of the secondary raw materials, wherein the first pH value differs from the second pH value. providing a mixture containing the secondary raw material and being formed on the basis of the processed product; bringing together a mineral-containing material in the form of slurry, pellets or granules and the mixture containing the secondary raw material to adsorb the secondary raw material onto the mineral-containing material, wherein the mineral-containing material contains or consists of a natural clay mixture, a synthetic clay mineral, a zeolite group mineral and/or a hydrargillite diaspore group mineral; bringing together a desorption solution, which is or contains a pure or dilute acid, and the mineral-containing material including the adsorbed secondary raw material to desorb the secondary raw material from the mineral-containing material, wherein two secondary raw materials are adsorbed on the mineral-containing material, and wherein the bringing together of a desorption solution and the mineral-containing material including the adsorbed secondary raw material comprises: bringing together the mineral-containing material and a first desorption solution having a first pH value to desorb the first of the secondary raw materials; and bringing together the mineral-containing material and a second desorption solution having a second pH value to desorb the second of the secondary raw materials, wherein the first pH value differs from the second pH value. bringing together the mineral-containing material and a first desorption solution having a first pH value to desorb the first of the secondary raw materials; and bringing together the mineral-containing material and a second desorption solution having a second pH value to desorb the second of the secondary raw materials, wherein the first pH value differs from the second pH value. <EOS>