Abstract: The invention relates to a process for preparing aminomethylated bead polymers using condensed formaldehydes and carbonyl halides.

Abstract: The present invention relates to quaternized diethylenetriamine-functionalized polyacrylate bead polymers, to a process for preparing same and to their use in the removal of oxoanions, particularly chromium (VI) oxoanions from aqueous- and/or organics solutions.

Abstract: The invention relates to a process for preparing aminomethylated bead polymers using condensed formaldehydes and carbonyl halides.

Abstract: The invention relates to a process for preparing aminomethylated bead polymers from N-carboxymethylphthalimides, which are used as anion exchangers or can be converted further to chelate resins.

Abstract: The invention relates to a process for preparing aminomethylated bead polymers using condensed formaldehydes and carboxylic anhydrides.

Abstract: The present invention relates to quaternized diethylenetriamine-functionalized polyacrylate bead polymers, to a process for preparing same and to their use in the removal of oxoanions, particularly chromium (VI) oxoanions from aqueous- and/or organics solutions.

Abstract: The invention relates to a process for preparing aminomethylated bead polymers using condensed formaldehydes and carboxylic anhydrides.

Abstract: The invention relates to a process for preparing aminomethylated bead polymers from N-carboxymethylphthalimides, which are used as anion exchangers or can be converted further to chelate resins.

Abstract: A continuous ion exchange system and method for recovering uranium from a pregnant liquor solution wherein the method includes the steps of: (a) treating the pregnant liquor solution (16) with a membrane (28) to produce: i) a leach permeate solution (30) at least partially depleted of uranium and carbonate and ii) a leach concentrate solution (30?) having a relatively higher concentration of uranium and carbonate and which is at least partially depleted of chloride; (b) passing the leach concentrate stream (30?) through an ion exchange bed to load uranium onto a strong base anion exchange resin and produce an untreated barren (18) solution depleted of uranium, (c) passing an eluant solution (20) comprising bicarbonate through the loaded ion exchange bed to strip uranium from the strong base anion exchange resin and produce an eluate (22) comprising uranium and bicarbonate, (d) precipitating uranium (24) from the eluate (22) to produce a residual eluant solution (26) depleted of uranium, and (e) repeating step

Abstract: A method for removing uranium from an uranium-containing aqueous solution having a salinity of at least 0.5 ppt, comprise the step of passing the solution through a bed of anion exchange resin impregnated with polyphenol.

Abstract: A method for removing uranium from an uranium-containing aqueous solution having a salinity of at least 0.5 ppt, comprise the step of passing the solution through a bed of anion exchange resin impregnated with polyphenol.

Abstract: The present invention is directed to a new more environmentally friendly method for the separation of metals from concentrated solution or more specifically to separate monovalent metals from a solutions that comprise high levels of multivalent metals by using a sulfonic functionalized resin.

Abstract: A method for the recovery of uranium from pregnant liquor solutions that comprise levels of chloride of 5 to 80 g/L by using an amino phosphonic functionalized resin. The method includes providing an amino phosphonic functionalized resin; providing a pregnant liquor solution comprising and uranium; passining the pregnant liquor solution over the amino phosphonic functionalized resin to separate the uranium from the pregnant liquor solution; and eluting the uranium.

Abstract: The present invention relates to a solid bed adsorptive separation of organic acid and/or amino acids from fermentation broths containing organic acid and/or amino acid.

Abstract: The present invention is directed to a new more environmentally friendly method for the recovery of uranium from pregnant liquor solutions that comprise high concentration of sulfate by using an amino phosphonic functionalized resin.

Abstract: The present invention is directed to a new more environmentally friendly method for the separation of metals from concentrated solution or more specifically to separate monovalent metals from a solutions that comprise high levels of multivalent metals by using a sulfonic functionalized resin.

Abstract: The present invention is directed to a new more environmentally friendly method for the recovery of uranium from pregnant liquor solutions that comprise high levels of chloride by using an amino phosphonic functionalized resin.

Abstract: The present invention relates to a solid bed adsorptive separation of organic acid and/or amino acids from fermentation broths containing organic acid and/or amino acid.

Abstract: A method for purification of glycerol, especially crude glycerol from biodiesel production. The method uses gel-type acidic ion exchange resin beads to separate fatty acid salts and inorganic salts from the crude glycerol.

Abstract: A method for purification of glycerol, especially crude glycerol from biodiesel production. The method uses gel-type acidic ion exchange resin beads to separate fatty acid salts and inorganic salts from the crude glycerol.