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| Number | Title | Issue Date |
| 5772890 | CMA production utilizing organic ion exchange from fermentation broth A method is provided for removing an anion from an aqueous liquid, such as a fermentation broth. The aqueous broth is contacted with a water-immiscible ion exchange liquid to extract the anion from the broth. The anion exchange liquid is then back extract... | 06/30/1998 |
| 5766473 | Enzyme loaded hydrophilic porous structure for protecting oxygen sensitive products and method for preparing same Articles having a complex geometric configuration have hydrophilicity imparted to at least a portion of surfaces of the articles while substantially retaining the complex geometric configuration. The hydrophilicity is imparted by an extremely thin, self-i... | 06/16/1998 |
| 5738792 | Method for separation of matter from suspension A process for filtration of matter from a liquid suspension through a membrane uses a rotor within a concentric shell rotating with a surface velocity which, together with the rotor-shell gap and suspension viscosity, establishes vigorous vortex cells abo... | 04/14/1998 |
| 5665237 | Method for separating materials A process for the separation of naphthalenesulfonate-based carbonyl condensates from water is provided. The process comprises contacting a mixture comprised of water and a naphthalenesulfonate-based carbonyl condensate (preferably a material selected from... | 09/09/1997 |
| 5656167 | Dimensionally stabilized breathable membrane A breathable membrane and a method of constructing a fabric having the membrane, wherein the membrane is resistive to transport of liquid water, has a layer of breathable material and is stabilized dimensionally against distension by a force field, such a... | 08/12/1997 |
| 5647976 | High pressure and temperature cell for solvent extraction An extraction cell apparatus (10) for use in elevated pressure and temperature fluid extractions having a pressure resistant vessel (12) forming a cavity (11), and at least one shoulder portion (13) defining an opening (14) communicating with the cavity (... | 07/15/1997 |
| 5645688 | Bleaching compositions and processes employing sulfamates and polyaminocarboxylic acids Pulp bleaching processes employing peroxides and/or oxygen are improved by using bleaching additives, preferably before the application of the peroxide and/or oxygen. The bleaching additives contain at least one alkali metal sulfamate such as a sodium sul... | 07/08/1997 |
| 5643452 | High-flux hollow-fiber membrane with enhanced transport capability and process for making same Semipermeable membranes are disclosed for purifying aqueous biological fluids. The membranes are particularly suitable for purifying extracorporeal blood via hemodialysis. The membranes, preferably configured as hollow fibers, are made from a hydrophilic ... | 07/01/1997 |
| 5641386 | Aminoalkane diphosphonic acids in pulp bleaching A process for the bleaching of pulp comprising the step of bleaching the pulp with hydrogen peroxide and an effective amount of at least one biodegradable 1-aminoalkane-1,1-diphosphonate chelating agent to enhance the bleaching of the pulp, is disclosed. ... | 06/24/1997 |
| 5641539 | Molecular imaging Disclosed are chemically-produced specific binding, "molecular imaged" sorbents which reversibly bind a preselected macromolecule by spatially matched multipoint interactions between functional groups synthesized on the surface of the sorbent and function... | 06/24/1997 |
| 5639375 | Concentration of pesticides by membrane perstraction Disclosed is a method for concentrating by 20 to 10,000 fold a semivolatile or essentially nonvolatile organic compound, such as a herbicide or pesticide, from a contaminated aqueous solution into a carrier fluid for simultaneous or subsequent analysis. A... | 06/17/1997 |
| 5639373 | Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate A vertical skein of "fibers", opposed terminal portions of which are held in headers unconfined in a modular shell, is aerated with a gas-distribution means which produces a mass of bubbles serving the function of a scrub-brash for the outer surfaces of t... | 06/17/1997 |
| 5639348 | Bleaching compositions comprising sulfamates and borates or gluconates and processes Pulp bleaching processes employing peroxides and/or oxygen are improved by using stabilizing bleaching additives, preferably before the application of the peroxide and/or oxygen. The bleaching additives contain at least one sulfamic acid or sulfamate such... | 06/17/1997 |
| 5637224 | Hollow fiber contained liquid membrane pervaporation for removal of volatile organic compounds from aqueous solutions A vaporizable solute transfer system for transferring a vaporizable solute from an aqueous feed solution to an extractant liquid comprises a fluid tight housing, a porous membrane which divides the housing into a feed solution chamber and an extractant ch... | 06/10/1997 |
| 5637233 | Method and apparatus for separating grease from water A volume of slurry including grease, water and sediment is pumped from a grease trap into a first interior compartment of a mobile tank truck, and the sediment allowed to settle. Some of the grease and water is then transferred from above the settled sedi... | 06/10/1997 |
| 5637222 | Process for the fractional separation of (meth)acrylic acid from a mixture containing (meth)acrylic acid A process for the fractional separation of (meth)acrylic acid from a mixture containing (meth)acrylic acid, in which (meth)acrylic acid is tapped off from the rectifying column at a point above the level at which the liquid mixture containing (meth)acryli... | 06/10/1997 |
| 5635067 | Fluid separation membranes prepared from blends of polyimide polymers Anisotropic fluid separation membranes having an integral discriminating layer are formed from blends of two types of polyimides. The first type is a phenylindane containing polyimide. The second type consists of polyimides formed from the reaction of ben... | 06/03/1997 |
| 5635070 | Apparatus and method for supercritical fluid extraction To pump supercritical carbon dioxide into a supercritical extractor without overpressure in the reservoir and to record the volume being delivered, the pumping speed is controlled and the volume pumped is determined from a pressure-related signal used in ... | 06/03/1997 |
| 5632902 | Filtering method and apparatus including valves with valve plugs of a cooled fluid substance Filtering apparatus including two or more passages acting in parallel, each having an extended filter which passes through inlet and outlet ports preferably sealed by substantially solidified plugs of the flowable substance such as polymer being filtered.... | 05/27/1997 |
| 5630945 | Method for recovering uncrosslinked synthetic resin waste A method for recovering an uncrosslinked synthetic resin waste including dissolving the uncrosslinked synthetic resin waste in a solvent containing, as an active ingredient, one or more oxyisobutyric acid esters selected from an alkyl -alkoxyisobut... | 05/20/1997 |
| 5630906 | Process for the delignifcation and bleaching of a lignocellulose material A method is provided for delignifying and bleaching a lignocellulose material, wherein an aqueous solution of a redox catalyst and an oxidant is reacted with the material. The catalyst comprises an organometallic cation of the general formula [(1)Mno... | 05/20/1997 |
| 5628906 | Extraction process The invention relates to an extraction process which comprises adding a primary solvent to a first solution containing a solute dissolved in a native solvent. The primary solvent is added in an amount sufficient to form a single-phase mixture comprising s... | 05/13/1997 |
| 5628914 | Method for recycling lithographic ink A closed system for reclaiming ink, solvent, and water from waste lithographic ink, or other ink types, without generating hazardous by-products is disclosed. The recycling process is performed under vacuum conditions on standard equipment, such as an agi... | 05/13/1997 |
| 5626758 | Coiled membrane filtration system A method and apparatus for achieving reverse osmosis, microfiltration, nanofiltration and ultrafiltration, produces Dean vortices against a membrane surface which is advantageously in a form of a wound helical membrane tube.... | 05/06/1997 |
| 5618435 | Synthesis of inorganic membranes including metals Inorganic membranes such as zeolite membranes or other molecular sieve membranes can be provided by using siliconee, polymer material as starting material. A thin film zeolite membrane or a thin film membrane formed of interlocking zeolite crystals can be... | 04/08/1997 |
| 5618418 | Dead-end membrane adsorbers A dead-end filtration unit without a housing comprising at least one filter cassette, each cassette comprising a plurality of laminar sections of porous adsorptive membrane, which have been rendered fluid-impermeable on their peripheries, the cassettes be... | 04/08/1997 |
| 5616246 | Hydrophilic membranes for electrochemical devices and method for preparing same Articles having a complex geometric configuration have hydrophilicity imparted to at least a portion of surfaces of the articles while substantially retaining the complex geometric configuration. The hydrophilicity is imparted by an extremely thin, self-i... | 04/01/1997 |
| 5614096 | Compressed adsorbent filter cake A compressed adsorbent filter cake for removing caffeine from liquids. The filter cake is composed of a compressed matrix of fibrous material; and adsorbent particulate material integrated within the compressed matrix of fibrous material, so that passage ... | 03/25/1997 |
| 5609762 | Cellulose membranes comprising cotton fibers and method of manufacturing them In a method for manufacturing cellulose membranes in the form of flat films, tubular films, or hollow filaments with improved biocompatibility, cotton fibers, in particular linters, are treated in alkaline liquor in a single-stage process with gaseous mol... | 03/11/1997 |
| 5609764 | Extraction column or tower with separate volumes An extraction column includes: one or several vertically aligned stages; fittings for inletting a phase containing a component that is desired to be extracted; fittings for inletting an extracting phase; and fittings for outletting the two phases after tr... | 03/11/1997 |
| 5607590 | Material for medical use and process for preparing same There are disclosed a material for medical use comprising two sheets of collagen membrane adhered to each other with an adhesive and having interposed therebetween a mesh-like intermediary material, wherein the mean pore size of the mesh-like intermediary... | 03/04/1997 |
| 5607591 | Bis-crown calix [4]arenes, their preparation process and their use for the selective extraction of cesium and actinides The invention relates to bis-crown calix[4]arenes, their preparation process and their use for the selective extraction of cesium and actinides. Bis-crown calix[4]arenes are in accordance with the formula: ##STR1## in which R1 and R2 | 03/04/1997 |
| 5603834 | Process for recovering pertechnetate ions from an aqueous solution also containing other ions A solid/liquid process for the separation and recovery of TcO4-1 ions from an aqueous solution is disclosed. The solid support comprises separation particles having surface-bonded poly(ethylene glycol) groups; whereas the aqueous sol... | 02/18/1997 |
| 5603835 | Trimethylolpropane color improvement This invention relates to a process for improving the color of trimethylolpropane (TMP) by extracting color-causing impurities generated in the reaction to produce TMP. This improved color TMP is characterized by a reduced acid wash color and phthalic anh... | 02/18/1997 |
| 5601716 | Filter material The invention concerns a filter material particularly useful in the manufacture of tea bags, coffee bags, coffee filters and the like. The filter material includes an at least two layer non-woven substrate material wherein the two layers are essentially p... | 02/11/1997 |
| 5597487 | Water purification and dispensing system A water purification and dispensing apparatus comprises a water inlet for obtaining water from a supply source and a water purification system with filters for removing impurities from the source water to produce purified water. The water purification sys... | 01/28/1997 |
| 5595658 | Membrane based on graft copolymers A membrane comprised of a graft copolymer includes a base component and a copolymer component. The base component includes a first polymer with a repeating unit: ##STR1## wherein m=0.1-0.9, n=0.9-0.1, p=0.03-0.04, R1 can be a linear, ... | 01/21/1997 |
| 5595659 | Filter material for removing chlorine from cold water in preparing a human-consumable beverage A filter material for removing chlorine from cold water used in preparing a human-consumable beverage having at least one layer of a mat of laid fibers of cellulosic fibers and synthetic textile fibers and mixtures thereof. A synthetic hydrophilic, food-g... | 01/21/1997 |
| 5595661 | Process for recover halocarbons from liquid waste slurries A process for recovering a halocarbon from a liquid waste slurry containing the halocarbon admixed with one or more contaminants using countercurrent or co-current extraction is described.... | 01/21/1997 |
| 5595667 | Liquid filtration and incineration Disclosed is a filter aid or medium and a method of filtering liquid wastes having good filtration, good flow rates through the filter area, and heat value of the resulting filter cake containing the filtered solids of at least 5000 Btu per pound of filte... | 01/21/1997 |
