A chemical filter includes a first buffer layer, at least one first filter layer disposed on the first buffer layer and including a pair of first air-permeable bodies facing each other and at least one first adsorption layer between the pair of first air-permeable bodies, and a second filter layer disposed on the first filter layer and including a pair of second air-permeable bodies facing each other and at least one second adsorption layer between the pair of second air-permeable bodies, wherein the first filter layer is configured to be attachable to and detachable from the second filter layer.

A chemical filter includes a first buffer layer, at least one first filter layer disposed on the first buffer layer and including a pair of first air-permeable bodies facing each other and at least one first adsorption layer between the pair of first air-permeable bodies, and a second filter layer disposed on the first filter layer and including a pair of second air-permeable bodies facing each other and at least one second adsorption layer between the pair of second air-permeable bodies, wherein the first filter layer is configured to be attachable to and detachable from the second filter layer.

There is provided a method for obtaining a purified aqueous solution of silicic acid containing less metal impurities such as Cu and Ni using water glass as a raw material with less number of purification steps than that in conventional methods without using any unnecessary additives. The method for producing a purified aqueous solution of silicic acid, the method comprising the steps of: (a) passing an aqueous solution of alkaline silicate having a silica concentration of 0.5% by mass or more and 10% by mass or less through a column filled with a polyamine-, iminodiacetic acid-, or aminophosphoric acid-type chelating resin, and (b) passing the aqueous solution passed in the step (a) through a column filled with a hydrogen-type cation exchange resin.

There is provided a method for obtaining a purified aqueous solution of silicic acid containing less metal impurities such as Cu and Ni using water glass as a raw material with less number of purification steps than that in conventional methods without using any unnecessary additives. The method for producing a purified aqueous solution of silicic acid, the method comprising the steps of: (a) passing an aqueous solution of alkaline silicate having a silica concentration of 0.5% by mass or more and 10% by mass or less through a column filled with a polyamine-, iminodiacetic acid-, or aminophosphoric acid-type chelating resin, and (b) passing the aqueous solution passed in the step (a) through a column filled with a hydrogen-type cation exchange resin.

A three component composition for use in the treatment of an autoimmune disease where the first component comprises a bimodal synthetic carbon particle mixture; the second component comprises a bimodal synthetic carbon particle mixture and an anion exchange resin and the third component comprises a bimodal synthetic carbon particle mixture and a cation exchange resin.

A three component composition for use in the treatment of an autoimmune disease where the first component comprises a bimodal synthetic carbon particle mixture; the second component comprises a bimodal synthetic carbon particle mixture and an anion exchange resin and the third component comprises a bimodal synthetic carbon particle mixture and a cation exchange resin.

The present invention relates to the extraction of lithium from liquid resources such as natural and synthetic brines, leachate solutions from clays and minerals, and recycled products.

A three component composition for use in the treatment of an autoimmune disease where the first component comprises a bimodal synthetic carbon particle mixture; the second component comprises a bimodal synthetic carbon particle mixture and an anion exchange resin and the third component comprises a bimodal synthetic carbon particle mixture and a cation exchange resin.

A three component composition for use in the treatment of an autoimmune disease where the first component comprises a bimodal synthetic carbon particle mixture; the second component comprises a bimodal synthetic carbon particle mixture and an anion exchange resin and the third component comprises a bimodal synthetic carbon particle mixture and a cation exchange resin.

A cartridge for treating drinking water, the cartridge comprising a mixture of an ion-exchange material, one part of which is a highly acidic ion-exchange material and another part of which is a weakly acidic ion-exchange material, wherein one of the materials is loaded with alkali ions or alkaline earth ions.