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5490939 Process for reconcentrating overspray from one-component coating compositions
PatentsALERT
liquid, or full or partially full of effluent liquid. The likelihood of delivering the wrong liquid to the associated apparatus is minimized. The invention is particularly useful for delivery of liquid chemicals to a photographic processor apparatus.
5490377
water-lean glycol for reintroduction into the contacting zone and a water-containing gaseous overhead. The gaseous overhead is partially condensed and the resulting gaseous components are returned to the contacting zone. In a preferred embodiment, the glycol is further purified by contact in a separate stripping column with dry stripping gas under a pressure lower than that of the regeneration zone.
PERFORMANCE ENHANCED GAS TURBINE POWERPLANTS
5490934
Janes Clarence W Sacramento, CA, UNITED STATES assigned to California Energy Commission
METHOD OF BIOLOGICAL DENITRIFICATION
A gas turbine driven powerplant having one or more compressors for producing a down stream air flow, a heat exchanger positioned down stream of the compressors followed by a side stream flow coolant line, a regenerator positioned down stream of the heat exchanger and side stream coolant line, a combustor positioned down stream of the regenerator, one or more turbines positioned down stream of the combustor and mechanically coupled to the compressors, and a power turbine positioned down stream of the turbines. Combustible effluent flows through the heat exchanger and to the combustor, and air discharged from the compressors flows through the heat exchanger and to the coolant line and regenerator. Heat is transferred from the compressor discharge air to the combustible effluent, thereby producing cooling air and heating the combustible effluent. The heat exchanger can be a heat exchanger or a methane/steam reformer which produces a hydrogen-rich, low NOx, steam diluted combustible effluent. In further embodiments, a small portion of the cool air is combined with the recuperation water in a heat recovery unit to allow vaporization of the water throughout the initial portion of the heat exchange path and form a two phased feed of water and air to the combustor. Additionally, in all embodiments a portion of the cooled compressed air can be processed by a compressor/expander for providing coolant to the turbines, compressors, and auxiliary equipment.
5490873
HYDROCARBON EMISSION REDUCTION Behrens Steven D; Bullin Jerry College Station, TX, UNITED STATES assigned to Bryan Research & Engineering inc An improved process for the glycol dehydration of water-containing natural gas comprises contacting the natural gas and glycol in a contacting zone to produce a dried natural gas and a water-rich glycol, and heating the water-rich glycol in a regeneration zone to produce a
S&mid Lawrence A Manhattan, KS, UNITED STATES assigned to Schmid Lawrence A A process for providing biological denitrification of a previously nitrified wastewater includes the initial step of supplying to a tank an influent including a relatively small concentration of biomass and a fraction of nitrates. The influent is supplied adjacent a bottom of the tank, and a volume of waste water is retained in the tank. This volume in the tank has a biomass concentration greater than the influent biomass concentration, and the biomass in the tank provides biological denitrification of the wastewater during movement of the wastewater through the tank. Effluent is delivered from the tank, and includes a biomass concentration substantially equal to the influent biomass concentration and is substantially free of nitrates relative to the influent, the effluent being drawn from a top of the tank. During the process, the wastewater in the tank is intermittently mixed to maintain the biomass in suspension within the tank and to assist in controlling the concentration of biomass in the tank.
5490939
PROCESSFOR RECONCENTRATING OVERSPRAY FROM ONE-COMPONENT COATING COMPOSITIONS Gerigk Markus; Bruck Jochen; Hovestadt Wieland GERMANY assigned to Bayer Aktiengesellschafi The present invention relates to a multi-stage membrane filtration process for reconcentrating the overspray from a one-component, aqueous coating composition containing high molecular weight components having a weight average molecular weight of at least 2000 and at least 5% by weight, based on the total weight of the organic components of the coating composition, of a low molecular weight component having a weight average molecular weight of less than 2000, that has been diluted with spray booth water from spray booths having wet flushing to form
J. Cleaner
Prod. Volume
4, Number
1
75
PatentsAlERT
a booth/water overspray mixture by a) preconcentrating the booth water/overspray mixture in an ultrafiltration unit to obtain a first retentate containing high molecular weight components and a first permeant containing water and at least a portion of the low molecular weight components, b) treating said first permeant and the third permeant obtained in step c) below in a reverse osmosis unit to obtain a second permeant containing essentially pure water for recycle as booth water and a retentate containing low molecular weight components, c) treating said first and second retentates in a nanofiltration unit to obtain a third per-meant containing water and a minor portion of low molecular weight components and a third retentate which largely corresponds in composition and concentration to said one-component, aqueous coating composition.
5491011 THERMOPLASTIC MULTILAYER ETHYLENE POLYMER SHEET FOR CONTAINMENT OF ODORIFEROUS PRODUCT COMPONENTS Pezzoli Paul; Bollinger Randal Topeka, KS, UNITED STATES assigned to Colgate-Palmolive Company A recyclable multilayer ethylene polymer sheet structure for constructing a package to hold bulk products such as dry pet food having an odoriferous component, the sheet having, from the inner surface contacting the product, to the outer non-product contacting surface the structure: (*See Patent for Tabular Presentation*) PS where LLDPE is a linear low density polyethylene, HDPE is a high density polyethylene and BR is an odor barrier resin such as ethylene vinyl alcohol copolymer having odor barrier properties and LDPE is low density polyethylene.
5491037 METHOD FOR RECOVERING LITHIUM CELL MATERIALS Kawakami Soichiro Kabushiki Kaisha
Nara, JAPAN assigned to Canon
To provide a method for treating nonaqueous solvent type cells, in particular, a method by which lithium cells can be treated and resources can be recovered in safe and in a good efficiency, a method for recovering resources of lithium cells comprises the steps of cutting or boring a lithium cell comprised of at least a negative electrode active material, a separator, a positive electrode active material, an electrolyte solution (electrolytic solution), a collector and a cell casing, in an ignition preventing means; washing the lithium cell thus opened, with an organic solvent to recover
76
J. Cleaner
Prod. Volume
4, Number
1
the electrolytic solution; reacting lithium with a reacting agent to recover lithium in the form of lithium hydroxide or a lithium salt; carrying out filtration to recover the separator, the collector and a positive electrode material comprising the positive electrode active material; and carrying out distillation to recover the organic solvent. This makes it possible to safely treat lithium cells having been used up, containing organic solvents and metallic lithium, and efficiently recover the resources. This also makes it easy to recycle lithium cells.
5491121 ENVIRONMENTALLY FRIENDLY COLOR-CODED FORMS AND METHOD FOR CREATING SAME Kuchta Ron Naperville, IL, UNITED STATES An array of color-coded papers that can be collected and recycled with white paper without separation. The sheets are individually color-coded with a printing ink including an oil-based vehicle component and a dye-free pigment component that is dispersible in a surfactant-water mix used to recycle the paper. Preferably, the color code is on a marginal area, with the image area comprising the remainder of the sheets. The invention also relates to multi-part business form sets using an array of such sheets, arranged so that each sheet is distinguishable from another sheet in the form set by the color code.
5491190 REPULPABLE HOT MELT POLYMER/FATTY ACID COMPOSITIONS FOR FIBROUS PRODUCTS Sandvick Paul E; Verbrugge Calvin J Racine County, WI, UNITED STATES assigned to S C Johnson & Son Inc Hot melt polymer/fatty acid compositions are described that render fibrous products such as paper, paperboard and corrugated paper containers water-resistant at room temperature, but enable such articles to be repulped and recycled when the coated articles are repulped in a heated nearly neutral to alkaline pH aqueous medium. The compositions comprise from about 5% to 50% by weight of an addition polymer of from about 5 to 95 mole percent of an ethylenically unsaturated monocarboxylic acid or 50 to 95 mole percent of an ethylene-1,Zdicarboxylic acid or anhydride and the balance to a total of 100 mole percent of at least one additional ethylenically unsaturated monomer selected from the group consisting of 1-alkenes having
liquid, or full or partially full of effluent liquid. The likelihood of delivering the wrong liquid to the associated apparatus is minimized. The invention is particularly useful for delivery of liquid chemicals to a photographic processor apparatus.
5490377
water-lean glycol for reintroduction into the contacting zone and a water-containing gaseous overhead. The gaseous overhead is partially condensed and the resulting gaseous components are returned to the contacting zone. In a preferred embodiment, the glycol is further purified by contact in a separate stripping column with dry stripping gas under a pressure lower than that of the regeneration zone.
PERFORMANCE ENHANCED GAS TURBINE POWERPLANTS
5490934
Janes Clarence W Sacramento, CA, UNITED STATES assigned to California Energy Commission
METHOD OF BIOLOGICAL DENITRIFICATION
A gas turbine driven powerplant having one or more compressors for producing a down stream air flow, a heat exchanger positioned down stream of the compressors followed by a side stream flow coolant line, a regenerator positioned down stream of the heat exchanger and side stream coolant line, a combustor positioned down stream of the regenerator, one or more turbines positioned down stream of the combustor and mechanically coupled to the compressors, and a power turbine positioned down stream of the turbines. Combustible effluent flows through the heat exchanger and to the combustor, and air discharged from the compressors flows through the heat exchanger and to the coolant line and regenerator. Heat is transferred from the compressor discharge air to the combustible effluent, thereby producing cooling air and heating the combustible effluent. The heat exchanger can be a heat exchanger or a methane/steam reformer which produces a hydrogen-rich, low NOx, steam diluted combustible effluent. In further embodiments, a small portion of the cool air is combined with the recuperation water in a heat recovery unit to allow vaporization of the water throughout the initial portion of the heat exchange path and form a two phased feed of water and air to the combustor. Additionally, in all embodiments a portion of the cooled compressed air can be processed by a compressor/expander for providing coolant to the turbines, compressors, and auxiliary equipment.
5490873
HYDROCARBON EMISSION REDUCTION Behrens Steven D; Bullin Jerry College Station, TX, UNITED STATES assigned to Bryan Research & Engineering inc An improved process for the glycol dehydration of water-containing natural gas comprises contacting the natural gas and glycol in a contacting zone to produce a dried natural gas and a water-rich glycol, and heating the water-rich glycol in a regeneration zone to produce a
S&mid Lawrence A Manhattan, KS, UNITED STATES assigned to Schmid Lawrence A A process for providing biological denitrification of a previously nitrified wastewater includes the initial step of supplying to a tank an influent including a relatively small concentration of biomass and a fraction of nitrates. The influent is supplied adjacent a bottom of the tank, and a volume of waste water is retained in the tank. This volume in the tank has a biomass concentration greater than the influent biomass concentration, and the biomass in the tank provides biological denitrification of the wastewater during movement of the wastewater through the tank. Effluent is delivered from the tank, and includes a biomass concentration substantially equal to the influent biomass concentration and is substantially free of nitrates relative to the influent, the effluent being drawn from a top of the tank. During the process, the wastewater in the tank is intermittently mixed to maintain the biomass in suspension within the tank and to assist in controlling the concentration of biomass in the tank.
5490939
PROCESSFOR RECONCENTRATING OVERSPRAY FROM ONE-COMPONENT COATING COMPOSITIONS Gerigk Markus; Bruck Jochen; Hovestadt Wieland GERMANY assigned to Bayer Aktiengesellschafi The present invention relates to a multi-stage membrane filtration process for reconcentrating the overspray from a one-component, aqueous coating composition containing high molecular weight components having a weight average molecular weight of at least 2000 and at least 5% by weight, based on the total weight of the organic components of the coating composition, of a low molecular weight component having a weight average molecular weight of less than 2000, that has been diluted with spray booth water from spray booths having wet flushing to form
J. Cleaner
Prod. Volume
4, Number
1
75
PatentsAlERT
a booth/water overspray mixture by a) preconcentrating the booth water/overspray mixture in an ultrafiltration unit to obtain a first retentate containing high molecular weight components and a first permeant containing water and at least a portion of the low molecular weight components, b) treating said first permeant and the third permeant obtained in step c) below in a reverse osmosis unit to obtain a second permeant containing essentially pure water for recycle as booth water and a retentate containing low molecular weight components, c) treating said first and second retentates in a nanofiltration unit to obtain a third per-meant containing water and a minor portion of low molecular weight components and a third retentate which largely corresponds in composition and concentration to said one-component, aqueous coating composition.
5491011 THERMOPLASTIC MULTILAYER ETHYLENE POLYMER SHEET FOR CONTAINMENT OF ODORIFEROUS PRODUCT COMPONENTS Pezzoli Paul; Bollinger Randal Topeka, KS, UNITED STATES assigned to Colgate-Palmolive Company A recyclable multilayer ethylene polymer sheet structure for constructing a package to hold bulk products such as dry pet food having an odoriferous component, the sheet having, from the inner surface contacting the product, to the outer non-product contacting surface the structure: (*See Patent for Tabular Presentation*) PS where LLDPE is a linear low density polyethylene, HDPE is a high density polyethylene and BR is an odor barrier resin such as ethylene vinyl alcohol copolymer having odor barrier properties and LDPE is low density polyethylene.
5491037 METHOD FOR RECOVERING LITHIUM CELL MATERIALS Kawakami Soichiro Kabushiki Kaisha
Nara, JAPAN assigned to Canon
To provide a method for treating nonaqueous solvent type cells, in particular, a method by which lithium cells can be treated and resources can be recovered in safe and in a good efficiency, a method for recovering resources of lithium cells comprises the steps of cutting or boring a lithium cell comprised of at least a negative electrode active material, a separator, a positive electrode active material, an electrolyte solution (electrolytic solution), a collector and a cell casing, in an ignition preventing means; washing the lithium cell thus opened, with an organic solvent to recover
76
J. Cleaner
Prod. Volume
4, Number
1
the electrolytic solution; reacting lithium with a reacting agent to recover lithium in the form of lithium hydroxide or a lithium salt; carrying out filtration to recover the separator, the collector and a positive electrode material comprising the positive electrode active material; and carrying out distillation to recover the organic solvent. This makes it possible to safely treat lithium cells having been used up, containing organic solvents and metallic lithium, and efficiently recover the resources. This also makes it easy to recycle lithium cells.
5491121 ENVIRONMENTALLY FRIENDLY COLOR-CODED FORMS AND METHOD FOR CREATING SAME Kuchta Ron Naperville, IL, UNITED STATES An array of color-coded papers that can be collected and recycled with white paper without separation. The sheets are individually color-coded with a printing ink including an oil-based vehicle component and a dye-free pigment component that is dispersible in a surfactant-water mix used to recycle the paper. Preferably, the color code is on a marginal area, with the image area comprising the remainder of the sheets. The invention also relates to multi-part business form sets using an array of such sheets, arranged so that each sheet is distinguishable from another sheet in the form set by the color code.
5491190 REPULPABLE HOT MELT POLYMER/FATTY ACID COMPOSITIONS FOR FIBROUS PRODUCTS Sandvick Paul E; Verbrugge Calvin J Racine County, WI, UNITED STATES assigned to S C Johnson & Son Inc Hot melt polymer/fatty acid compositions are described that render fibrous products such as paper, paperboard and corrugated paper containers water-resistant at room temperature, but enable such articles to be repulped and recycled when the coated articles are repulped in a heated nearly neutral to alkaline pH aqueous medium. The compositions comprise from about 5% to 50% by weight of an addition polymer of from about 5 to 95 mole percent of an ethylenically unsaturated monocarboxylic acid or 50 to 95 mole percent of an ethylene-1,Zdicarboxylic acid or anhydride and the balance to a total of 100 mole percent of at least one additional ethylenically unsaturated monomer selected from the group consisting of 1-alkenes having