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| Number | Title | Issue Date |
| 4578195 | Process for the purification of effluents and purge streams containing trace elements An improved process for treating aqueous effluents and purge streams to selectively remove polluting elements such as iron, copper, lead and mercury therefrom is described. The procedure comprises contacting the effluent with a poly(dithiocarbamate) chela... | 03/25/1986 |
| 4569765 | Chromium oxide in ion exchange resin Novel anion exchange resin composites having hydrous chromium III oxide (Cr2 O3.nH.sub.2 O) incorporated therein are useful in removing a wide array of polyvalent metal cations from aqueous solution.... | 02/11/1986 |
| 4568467 | Reducing charging tendencies in flowing non-aqueous liquids Disclosed is a method of reducing the charging tendency in a flowing non-aqueous liquid which has a dielectric constant of less than about 50, by passing the liquid through an ion exchange resin charged with a weakly polar active group. Also disclosed is ... | 02/04/1986 |
| 4568466 | Method for pretreating aqueous solutions with weakly acidic cation exchange resins A method for treating aqueous solutions by ion exchange uses a weakly acidic cation exchange resin to remove ammonia and other volatile amines along with corrosion products and metal ion leakage from a solution while substantially reducing the quantity of... | 02/04/1986 |
| 4568176 | Method for maintenance of image forming device and member therefor A method for maintenance of an image forming device having an image forming member which forms visible images from electrostatic latent images comprises maintaining the image forming ability of said image forming member by contacting the surface of said i... | 02/04/1986 |
| 4551254 | Macroporous manganese dioxide water purifier A water purifier consisting essentially of manganese dioxide particles having a 20 to 48 mesh size and macroscopic pores which are so large in size as to permit passage of water therethrough. The particles may have active sites of needle-like or columnar ... | 11/05/1985 |
| 4548717 | Method for treating aqueous solutions with weakly acidic cation exchange resins A method for treating aqueous solutions by ion exchange uses a weakly acidic cation exchange resin and a strongly basic anion exchange resin to remove ammonia and other volatile amines along with corrosion products and metal ion leakage from a solution wh... | 10/22/1985 |
| 4547291 | Method for treating aqueous solutions with weakly acidic cation exchange resins A method for treating aqueous solutions by ion exchange uses a weakly acidic cation exchange resin and a strongly basic anion exchange resin to remove corrosion products and metal ion leakage from a solution while substantially reducing the quantity of ac... | 10/15/1985 |
| 4532044 | Arsenic removal method Aqueous and organic fluids which contain arsenic are contacted with spent oil shale from an oil shale retorting operation and separated therefrom, yielding a fluid of reduced arsenic content. In one embodiment, shale oil is placed in contact with spent oi... | 07/30/1985 |
| 4525332 | Recovery of germanium from aqueous solutions Germanium is recovered from aqueous solutions containing germanium, zinc, and antimony by sorption with an ion exchange resin which has as its matrix a backbone polymer to which are attached amine active groups chosen from secondary and tertiary amines an... | 06/25/1985 |
| 4522727 | Process for continuous removal of ammoniacal nitrogen from aqueous streams A continuous process for removal of ammoniacal nitrogen from water is disclosed. This process is useful for maintaining water quality in aquaculture operations, e.g., fish hatcheries and the like. A particulate stream of zeolitic ion exchange material is ... | 06/11/1985 |
| 4499058 | Liquid/liquid extraction of acidic aqueous streams comprising sulfate/titanium/iron values Acidic aqueous phases comprising sulfate ion and particularly sulfuric acid values, titanium ion and particularly titanium (IV) values, and iron ion, particularly iron (II) values, and advantageously waste streams emanating from a sulfate process for the ... | 02/12/1985 |
| 4497781 | Manufacture of magnesium hydroxide A process for making magnesium hydroxide which comprises treating brine with an adsorptive magnesium hydroxide whereby at least part of the boron ions contained in the brine are adsorbed on to the adsorptive magnesium hydroxide, the brine being mixed coun... | 02/05/1985 |
| 4486313 | Polymerication processes and products therefrom Ionic solutes are removed from fluids under oxidizing conditions or conditions of high physical stress or shock by contacting the fluids with ion exchange resin beads having macroreticular structure. These beads have a particular resistance to such condit... | 12/04/1984 |
| 4469744 | Protective clothing of fabric containing a layer of highly fluorinated ion exchange polymer A protective garment fabricated at least in part from a fabric which contains a layer of a highly fluorinated ion exchange polymer having functionality of the sulfonic and/or carboxylic type in the form of an alkali metal, ammonium or amine salt.... | 09/04/1984 |
| 4460555 | Ammonia scavenger A process for making particulate substantially water-insoluble magnesium phosphate product and method of use of the product for removing ammonia from aqueous solutions. The particulate magnesium phosphate product acts as a remarkably effective scavenger w... | 07/17/1984 |
| 4460474 | Process for the extraction of cesium ions from aqueous solutions using an adduct compound in solid form comprising a macrocyclical polyether and an inorganic heteropoly acid A process for the extraction of cesium ions from an aqueous solution with an adduct compound in solid form containing a macrocyclical polyether and an inorganic heteropoly acid. The adduct compounds employed comprise an adduct of (a) benzo-15-crown-5 (B-1... | 07/17/1984 |
| 4449991 | Removal of sulfur from process streams A process utilizing a sorbent in a manner which provides a greater and more efficient utilization of the sorbent for the removal of sulfur, or sulfur-containing compounds, from a process stream wherein a sulfur-containing process stream is passed through a fix... | 05/22/1984 |
| 4450057 | Process for removing aluminum and silica from alkali metal halide brine solutions A process for removing dissolved aluminum and silica contaminants from concentrated alkali metal halide brines used in membrane electrolytic cells is disclosed. The process involves contacting an acidified brine at a pH of between about 2.0 and about 3.0 ... | 05/22/1984 |
| 4423081 | Acidulation of milk A process is described for the acidulation of milk which comprises a first acidulation stage in which the milk is contacted with a cationic exchange resin in its acid form until a pH value is obtained which is not less than that at which flocculation of t... | 12/27/1983 |
| 4419245 | Copolymer process and product therefrom consisting of crosslinked seed bead swollen by styrene monomer A process for the manufacture of crosslinked ion exchange copolymer particles wherein small seed particles are swollen to final size by concurrently feeding monomer and polymerizing the same under controlled suspension conditions and the unique ion exchan... | 12/06/1983 |
| 4406870 | Method for the separation of carbon isotopes by chemical exchange method A method for the separation of the isotopes of carbon comprising contacting an aqueous solution containing an acid-dissociated type chemical species of a carbon-containing acid and a non-dissociated type chemical species of said acid with an anion exchang... | 09/27/1983 |
| 4405418 | Process for the production of sodium chlorate A process for the production of sodium chlorate comprising electrolyzing an aqueous sodium chloride solution in a diaphragmless sodium chlorate cell, characterized in that an aqueous sodium chloride solution containing, as impurities, calcium, magnesium, ... | 09/20/1983 |
| 4401572 | Selective zeolite sorption of group V-B element hydrides and derivatives thereof A method for selectively sorbing Group V-B element hydrides and derivatives thereof from an aqueous solution containing same which comprises contacting said solution under ion-exchange conditions with a crystalline zeolite material having a pore dimension... | 08/30/1983 |
| 4400305 | Adsorbents comprising hydrated ferrites of Ti, Zr, and Sn and cured thermosetting resins An adsorbent, which has been prepared by mixing (a) one part by weight of (i) at least one member selected from the group consisting of hydrated ferrites of titanium, zirconium and tin or (ii) a mixture of the said hydrated ferrites(s) and at least one me... | 08/23/1983 |
| 4394353 | Separation of rare earth metals using a cation exchanger A process for the separation of one rare earth metal from another in a mixture of rare earth metals by chromatographic displacement using a complexing agent and a cation exchanger, which process comprises using a cation exchanger having a micro-void volum... | 07/19/1983 |
| 4386006 | Ion-exchange compositions This invention relates to novel ion exchange compositions and to a method for their manufacture. Ion exchange compositions, wherein a material having ion exchange capacity is supported on a solid, water-insoluble, porous substrate, are prepared by contact... | 05/31/1983 |
| 4381926 | Method and apparatus for regulating ammonia concentration during scrubbing of gaseous mixtures Methods and apparatus for scrubbing gaseous mixtures containing ammonia are disclosed in which the gaseous mixtures are contacted with methanol in a scrubbing column to remove any acidic gases therefrom, the methanol is separated from the acidic gases and... | 05/03/1983 |
| 4349442 | Method and apparatus for treating water by ion exchange A receptacle has therein a lower bed of mixed anionic and cationic ion exchange resins and an upper bed of cationic ion exchange resins. The upper bed rests directly on the lower bed without any mechanical separation therebetween. Regeneration of the uppe... | 09/14/1982 |
| 4344851 | Phillipsite-type zeolites for ammonia adsorption Ammonium ions are selectively removed from aqueous solutions containing calcium cations by cation exchange with natural or synthetic zeolites of the phillipsitegismondite type, which possess unusual capacity and selectivity for the ammonium ion.... | 08/17/1982 |
| 4331541 | Fiber-supported ion exchanger Ion exchange materials are prepared by retaining a vinyl monomer solution within the interstices of a fiber structure, such as a woven or non-woven fabric, polymerizing these monomers in the presence of an organic solvent sparingly soluble or totally inso... | 05/25/1982 |
| 4279791 | Recovery of cerium from polymer dispersions This invention relates to removal of cerium, used as a free-radical initiator, from aqueous polymeric dispersions, particularly starch graft copolymer dispersions, by adsorbing cerium (III) onto a strong cation exchange resin, to separation of the adsorbe... | 07/21/1981 |
| 4276177 | High efficiency filtration with impurity concentration and ultrafiltration rejection flow recirculation The rejection flow from a water ultrafiltration system is passed through a filtration means for removal of bacteria, viri, pyrogens, and colloids, the effluent of which is reintroduced into the affluent presented to the ultrafiltration surface. Treatment ... | 06/30/1981 |
| 4263146 | Process for removing cationic substances from aqueous solutions A process for removing cationic substances from an aqueous solution, which comprises bringing the solution into contact with a cellulose-containing material which has been chemically modified anionically and in which the anionic constituent is bonded to t... | 04/21/1981 |
| 4261961 | Process for the extraction of potassium from aqueous alkaline solution A process for liquid-liquid ion exchange of alkali metal ions. An alkaline aqueous phase containing potassium ions together with other alkali metal ions is contacted with an organic phase containing a polyol-boron-alkali metal complex. The organic phase p... | 04/14/1981 |
| 4219414 | Method for fluid purification and deionization A method for continuously removing undissolved matter from a fluid and for selectively deionizing the fluid when the concentration of undesired ions exceeds a predetermined level, comprising the steps of passing the fluid through a tank containing a filte... | 08/26/1980 |
| 4207184 | Process for the purification of industrial effluents A process for purifying industrial effluents, wherein said effluents are brought into contact with a polymer adsorption material which is in the form of a solvated, preferably hydrated, gel.... | 06/10/1980 |
| 4202765 | Hydroxylamine purification via cation exchange A process for separating hydroxylamine from an aqueous solution containing hydroxylammonium salts in mixture with salts of predominantly monovalent cations whose corresponding free bases have base dissociation constants greater than 10-7. Said ... | 05/13/1980 |
| 4201665 | Use of nonstoichiometric carbon-sulfur compounds to remove components from liquids Nonstoichiometric carbon-sulfur compounds have been found to be effective adsorbents for removing a wide variety of organic and/or inorganic materials from liquids, preferably polar liquids. Removal of biorefractory organics, such as aromatics, is particu... | 05/06/1980 |
| 4198326 | Method for preparing modified graft copolymers of cellulose with monovinyl monomers in the presence of a divinylbenzene modifier A method for preparing modified graft copolymers of cellulose with monovinyl monomers containing ionic groups or non-ionic groups capable of being converted to ionic ones involving a free-radical polymerization of said monovinyl monomers onto cellulose in... | 04/15/1980 |
