Patent application number | Description | Published |
20140107236 | CROSS-LINKED POLYPHOSPHONATE-SULFONE COMPOSITION FOR REMOVAL OF METAL IONS FROM WASTEWATER - The cross-linked polyphosphonate-sulfone composition for removal of metal ions from wastewater relates to a cross-linked anionic polyelectrolyte polymer for the removal of metal ions, such as lead (Pb | 04-17-2014 |
20140190895 | CALCIUM SALFATE SCALE -INHIBITING COMPOSITIONS - The calcium sulfate scale-inhibiting compositions are polyelectrolyte antiscalant compositions for the inhibition of calcium sulfate scale formation in desalination plant feed brine, such as that typically used with reverse osmosis desalination plants. In order to inhibit the formation of calcium sulfate scale, the polyelectrolyte antiscalant compositions are mixed at a concentration between approximately 1 ppm and approximately 50 ppm into the desalination plant feed brine. The polyelectrolyte antiscalant composition may be either poly[disodium 3-(diallylamino)propanephosphonate]-alt-(sulfur dioxide), poly[sodium 5-(diallylcarboxymethylammonio)pentanoate]-alt-(sulfur dioxide), or poly[sodium 5-(diallylcarboxymethylammonio)pentanoate]. | 07-10-2014 |
20140249284 | CROSS-LINKED POLYAMINOCARBOXYLATES FOR THE REMOVAL OF METAL IONS FROM AQUEOUS SOLUTIONS - The cross-linked polyaminocarboxylates for the removal of metal ions from aqueous solutions of the present invention are cross-linked anionic polyelectrolytes CAPE 6 and CAPE 9, containing pH-responsive amino acid residues. The cross-linked anionic polyelectrolytes have been synthesized via cycloco-polymerization and ter-polymerization of a diallylammonioethanoate monomer (90 mol %) and a cross-linker, 1,1,4,4-tetraallylpiperazinium dichloride (10 mol %) in the absence of SO2 (CAPE 6) and in the presence of SO | 09-04-2014 |
20140323685 | CROSS-LINKED POLYZWITTERION/ANION FOR THE REMOVAL OF STRONTIUM FROM AQUEOUS SOLUTIONS - The cross-linked polyzwitterion/anion for the removal of strontium from aqueous solutions is a polyzwitterion having the following structure: | 10-30-2014 |
20150018475 | AQUEOUS TWO-PHASE SYSTEMS - The aqueous two phase systems (ATPS) contain partly urethanized PVA (polyvinyl alcohol) and hydrophobically modified cyclocopolymers formed from the monomers diallylammonioethanoate, 0-3 mol % dodecyldiallylammonium chloride and sulphur dioxide, the copolymers having varying proportions of polybetaine (PB) and anionic polyelectrolyte (APE) fractions. The aqueous two-phase systems are useful in the separation and purification of biomaterials. | 01-15-2015 |
20150072252 | FUEL CELL MEMBRANE - The fuel cell membrane is a polymer electrolyte (or polyelectrolyte) membrane formed from a blend of sulfonated poly(ether ether ketone) (SPEEK) and phosphonated polysulfone in the ester form (PPSU-E), where the sulfonated poly(ether ether ketone) and the phosphonated polysulfone each form about 50 wt % of the polyelectrolyte membrane. The polyelectrolyte membrane is made by dissolving a mixture of SPEEK and PPSU in the ester form (PPSU-E) in dimethylacetamide (DMAc) at room temperature to form a solution. The SPEEK/PPSU-E mixture has a concentration of between about 10 wt % and about 15 wt % in the solution. The solution is then stirred and left to release air bubbles therefrom. The DMAc is then evaporated from the solution, leaving the resultant polyelectrolyte membrane, which is then washed and dried. | 03-12-2015 |
20150073097 | CROSS-LINKED POLYAMINOMETHYLDIPHOSPHONATE FOR THE REMOVAL OF METAL IONS FROM WASTEWATER - The cross-linked polyaminodiphosphonate for the removal of metal ions from wastewater is a cross-linked anionic polyelectrolyte synthesized via cyclocopolymerization of diallylaminomethyldiphosphonic acid and 1,1,4,4-tetraallylpiperazinium dichloride (10 mol %), a cross-linker, in the presence of tert-butylhydroperoxide in aqueous solution at 85° C., followed by treatment with NaOH. The cross-linked polyaminodiphosphonate may be used to remove copper and cadmium ions from wastewater. The adsorption process is spontaneous and endothermic in nature, with negative and positive values for ΔG and ΔH, respectively. The efficiency of Cu | 03-12-2015 |
20150144162 | SYNTHESIS AND ANTISCALANT BEHAVIOR OF A NOVEL POLYZWITTERIONIC ACID - A zwitterionic monomer and corresponding cyclopolymerized polyzwitterion (±) (PZ) containing, on each repeating unit, both phosphonate and sulfonate functionalities. Phosphonate ester hydrolysis in PZ gave a pH-responsive polyzwitterionic acid (±) (PZA). The PZA under pH-induced transformation was converted into polyzwitterion/anion (±−) (PZAN) and polyzwitterion/dianion (±=) (PZDAN). | 05-28-2015 |
20150144556 | ANTISCALANT COMPOUND AND METHODS OF MAKING AND USING THE SAME - The antiscalant compound is a dianionic polyelectrolyte (DAPE), namely, poly[disodium 3-(N,N-diallylamino)propanephosphonate]. The cationic polyelectrolyte (CPE) polydiallyl(diethylphosphonato)propylammonium chloride is synthesized by cyclopolymerization of the monomer. The CPE contains a pendant having a three-carbon spacer separating the diethylphosphonate and NH | 05-28-2015 |
20150144569 | POLY(ZWITTERION-ALT-SULFUR DIOXIDE) COPOLYMER - The poly(zwitterion-alt-sulfur dioxide) copolymer includes a structural unit having the structural formula: | 05-28-2015 |