Patent ID: 9320987
Filing Date: 2016-04-26
CPC Classification: B01D,C10G,C10L,Y02E,Y02P

Claim Text:
1. A method for the removal of inorganic compounds from raw material for the production of clean materials, the raw material is biomass or coal or residues or wastes or sludges or any combination thereof, the method including the following steps: providing a salt, wherein the salt contains zirconium or yttrium, mixing water with the salt to produce an aqueous solution that contains salt, and leaching the raw material with the aqueous solution that contains salt, wherein the method further comprises subsequent leachings carried out in succession with different aqueous solutions, wherein each aqueous solution contains salt, and wherein the leachings are carried out in a reactor at a ratio of raw material over aqueous solution that varies from 33 g/l to 400 g/l, at a temperature varying from 13° C. to 95° C., wherein the leaching time varies from 5 minutes to 60 minutes, and wherein the raw material is agitated in the reactor.