The invention relates to ion exchangers laden with transition metal hexacyanoferrate complexes, to processes for the production thereof and to the use of these ion exchangers for removal and purification of cesium ions.

An evaporator is provided that separates, from a degraded substance, an absorbent branched off and introduced, a heating section which is interposed on a circulation line L.sub.21 that circulates the absorbent introduced into this evaporator, heats the circulating absorbent to obtain gaseous recovery steam containing a vaporized absorbent and CO.sub.2, a concentrate branch line L.sub.22 that branches off a part of the absorbent circulating through the circulation line L.sub.21 at a bottom of the evaporator from the circulation line L.sub.21 as a concentrate, a cooler that is interposed on this concentrate branch line L.sub.22 and cools the concentrate, an ionic degraded substance removal section that removes an ionic degraded substance in the cooled concentrate, and a purified absorbent discharge line L.sub.23 that reuses the concentrate as a purified absorbent from which the ionic degraded substance is removed.

An evaporator is provided that separates, from a degraded substance, an absorbent branched off and introduced, a heating section which is interposed on a circulation line L.sub.21 that circulates the absorbent introduced into this evaporator, heats the circulating absorbent to obtain gaseous recovery steam containing a vaporized absorbent and CO.sub.2, a concentrate branch line L.sub.22 that branches off a part of the absorbent circulating through the circulation line L.sub.21 at a bottom of the evaporator from the circulation line L.sub.21 as a concentrate, a cooler that is interposed on this concentrate branch line L.sub.22 and cools the concentrate, an ionic degraded substance removal section that removes an ionic degraded substance in the cooled concentrate, and a purified absorbent discharge line L.sub.23 that reuses the concentrate as a purified absorbent from which the ionic degraded substance is removed.

An object of the present invention is to provide a chemical liquid purification method which makes it possible to obtain a chemical liquid having excellent defect inhibition performance. Another object of the present invention is to provide a chemical liquid. The chemical liquid purification method according to an embodiment of the present invention is a chemical liquid purification method including obtaining a chemical liquid by purifying a substance to be purified containing an organic solvent, in which a content of the stabilizer in the substance to be purified with respect to the total mass of the substance to be purified is equal to or greater than 0.1 mass ppm and less than 100 mass ppm.

A system for the removal of heat stable amine salts from an amine absorbent used in a carbon dioxide (CO.sub.2) capture process.

A system for the removal of heat stable amine salts from an amine absorbent used in a carbon dioxide (CO.sub.2) capture process.

A method for purifying an organic solvent, comprising contacting an organic solvent containing polyvalent metal ions with a monolithic organic porous ion exchanger.

According to the present invention, a method for purifying an organic solvent can be provided, wherein a high rate of removing polyvalent metal ions in an organic solvent is achieved.

The invention relates to new compositions of polyorganic functional groups modified silica. The compositions contain a wide range of different functional groups such as mercapto, sulfide, thiourea, amines and amides in the same composition and each of these functional groups are present in an array of numerous different oligomers, configurations and stereochemistry. These functional groups have a strong affinity for metals and particular targets. Combining a high number of these functional groups together in the same composition enhances the overall binding affinity of the functionalised material. Combination with different structural configurations further enhances the capacity to bind to diverse structural variations in the targets found in actual process, product and waste streams. This multitude of binding mechanisms enables very high levels of purification and target removal as well as selectivity to be achieved in product, process and waste streams. The compounds are useful for the purification of products and for the removal of unwanted organic and inorganic compounds from product, process and waste streams, as chromatography medium for the purification and separation of metals, metal complexes and organic and biological compounds, for solid phase extraction, for solid phase synthesis, for metal mediated heterogeneous catalysis, for metal ion abstraction and for the immobilisation of bio-molecules.

The invention relates to new compositions of polyorganic functional groups modified silica. The compositions contain a wide range of different functional groups such as mercapto, sulfide, thiourea, amines and amides in the same composition and each of these functional groups are present in an array of numerous different oligomers, configurations and stereochemistry. These functional groups have a strong affinity for metals and particular targets. Combining a high number of these functional groups together in the same composition enhances the overall binding affinity of the functionalised material. Combination with different structural configurations further enhances the capacity to bind to diverse structural variations in the targets found in actual process, product and waste streams. This multitude of binding mechanisms enables very high levels of purification and target removal as well as selectivity to be achieved in product, process and waste streams. The compounds are useful for the purification of products and for the removal of unwanted organic and inorganic compounds from product, process and waste streams, as chromatography medium for the purification and separation of metals, metal complexes and organic and biological compounds, for solid phase extraction, for solid phase synthesis, for metal mediated heterogeneous catalysis, for metal ion abstraction and for the immobilisation of bio-molecules.

In one aspect, a functionalized porous material includes a synthetic porous material, the synthetic porous material comprising a surface, wherein at least a portion of the synthetic porous material surface is a substrate; and a mixed-metal hydroxide, wherein the mixed-metal hydroxide is affixed to the substrate.