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Class Information
Number: 210/685
Name: Liquid purification or separation > Processes > Ion exchange or selective sorption > Removing ions > Anions > Including cation
Description: Process including removing a positively charged constituent from the liquid being treated.

Sub-classes under this class:

Class Number Class Name Patents
210/686 Utilizing mixed bed or amphoteric material 109

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8524298 Process and device for enriching water with magnesium ions Sep. 3, 2013
8252185 Water treatment apparatus and method Aug. 28, 2012
8217296 Fluid-quality control method, fluid-quality control apparatus, and electric-discharge machining apparatus employing the same Jul. 10, 2012
8034246 Wastewater mercury removal process Oct. 11, 2011
8029623 Acid removal in cleaning processes Oct. 4, 2011
8007672 Method for demineralizing condensate Aug. 30, 2011
7906083 Method of synthesizing zirconium-loaded fibrous adsorbent materials having phosphoryl groups and removal of objectionable substances using the adsorbents Mar. 15, 2011
7857979 Ion exchange reactor Dec. 28, 2010
7625492 Charge-based water filtration systems Dec. 1, 2009
7419601 Nanomesh article and method of using the same for purifying fluids Sep. 2, 2008
7326346 High capacity regenerable sorbent for removal of arsenic and other toxic ions from drinking water Feb. 5, 2008
7309676 Remover for heavy metals contained in water Dec. 18, 2007
7291274 Method of deionising and clarifying the aqueous medium used in an electrical discharge machine and the product used in said method Nov. 6, 2007
7252767 Hydrous zirconium oxide, hydrous hafnium oxide and method of making same Aug. 7, 2007
7098327 Dual-functional ion exchange resins from agricultural by-products Aug. 29, 2006
7070685 Method and device for decontaminating water which contains metal and/or is radioactively contaminated Jul. 4, 2006
7008542 Method for mixed mode adsorption Mar. 7, 2006
6969466 Purification of ammonia Nov. 29, 2005
6960302 Fluid treatment system Nov. 1, 2005
6869537 Metal chelate-forming fiber, process for producing the same, method of trapping metal ion with the fiber, and metal chelate fiber Mar. 22, 2005
6511603 Alkaline earth cation extraction from acid solution Jan. 28, 2003
6508940 Process for recovering onium hydroxides from solutions containing onium compounds Jan. 21, 2003
6488847 Process and equipment for recovering developer from photoresist development waste and reusing it Dec. 3, 2002
6432306 Device for the deionization of substances that are not stable at acidic pH Aug. 13, 2002
6426007 Removal of soluble metals in waste water from aqueous cleaning and etching processes Jul. 30, 2002
6350614 System for the ion exchange purification of hydroxylamine Feb. 26, 2002
6296772 Split ion exchange system and method of operating Oct. 2, 2001
6241893 Water filtration media, apparatus and processes Jun. 5, 2001
6210885 Modifying double stranded DNA to enhance separations by matched ion polynucleotide chromatography Apr. 3, 2001
6200483 Structured materials for purification of liquid streams and method of making and using same Mar. 13, 2001
6190637 Method for preparing [F-18-]fluoride ion Feb. 20, 2001
6123850 Process for the purification of virtually anhydrous organic liquids Sep. 26, 2000
6066259 Method for the deionization of substances that are not stable at acidic pH May. 23, 2000
6059857 Ultrapurification of organic solvents May. 9, 2000
6056878 Method and apparatus for reducing scaling in electrodeionization systems and for improving efficiency thereof May. 2, 2000
6001262 Cascade ion exchange for high purity water production Dec. 14, 1999
5976761 Fractionation of phenol formaldehyde condensate and photoresist compositions produced therefrom Nov. 2, 1999
5954965 Process for producing pure water Sep. 21, 1999
5951874 Method for minimizing wastewater discharge Sep. 14, 1999
5888398 Composition and process for separating cesium ions from an acidic aqueous solution also containing other ions Mar. 30, 1999
5863438 Processes for deionization and demineralization of fluids Jan. 26, 1999
5854080 Process for separating tritiated water Dec. 29, 1998
5843319 Positive-working radiation-sensitive mixture Dec. 1, 1998
5814224 Method for complex processing of sea-water Sep. 29, 1998
5788946 Purification of hydroxylamine Aug. 4, 1998
5769925 Process for the elution of precious metals absorbed on active carbon Jun. 23, 1998
5762897 Method for manufacturing hydroxylamine Jun. 9, 1998
5750031 Process for producing surfactant having a low metal ion level and developer produced therefrom May. 12, 1998
5739265 Fractionation of phenol formaldehyde condensate and photoresist compositions produced therefrom Apr. 14, 1998
5714075 Method of processing a cheese processing waste stream Feb. 3, 1998

1 2 3 4

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