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5670304 Recycling spent hydroquinone developer and a recycled hydroquinone developer
PatentsALERTIJournal
of Cleaner Production 6 (1998) 45-83
compounds from an air stream wherein airborne adsorbent material is mixed with contaminated exhaust air in a vertical main column. Volatile Organic Compounds (VOCs) within the exhaust air adhere to the adsorbent material and are thus removed from the air. The clean air exits the system and the saturated adsorbent material falls through the bottom of the main column and into a lower reservoir. The saturated adsorbent material is desorbed and recycled through the adsorber apparatus by being drawn up from the lower reservoir through a secondary column and deposited at the inlet to the main column. At the top end of the main column, the adsorbent material is once again dropped into the contaminated exhaust air flowing through the main column. This process is constant and adsorbent material is continuously being recycled through the system.
5667561 METHOD FOR SELECTIVE SEPARATION OF CARBON DIOXIDE FROM WASTE GAS OF COMBUSTION Suzuki Kenz; Inukai Keiich Aichi ken, JAPAN assigned to Agency of Industrial Science & Technology Ministry of International Trade & Industry
69
water oxidation is occuring in one reaction zone the effluent is being cooled to a subcritical temperahue and used to flush the second reaction zone to remove inorganic scale.
5667927 TONER FOR ELECTROPHOTOGRAPHY AND PROCESS FOR THE PRODUCTION THEREOF Kubota Hideyuki; Ozeki Eiichi Shizuoka, JAPAN assigned to Shimadu Corporation; Tomoegawa Paper Co Ltd A hydrolyzable biodegradable or for toner electrophotography, which permits the easy reclaiming and recycling of used copying paper, permits the easy deinking by an existing deinking system, can decrease environmental pollution caused by a toner waste, and has excellent toner properties owing to the uniform dispersion of additives, the toner containing, as a binder resin, a lactic acid-based resin of the formula (1), (*See Patent for Tabular Presentation*) PS wherein R is an alkali metal or an alkaline earth metal, and n is an integer of 10 to 20,000.
5669960 Selective separation and recovery of gaseous components of hot waste gas of combustion containing carbon dioxide is attained by causing the hot waste gas to contact an adsorbent containing as a substantial main component thereof an inorganic solid substance exhibiting surface basicity and inducing adsorption of the gaseous components of the hot waste gas on the adsorbent and then selectively separating the adsorbed gaseous components by virtue of differences in retention time among the gaseous components on the adsorbent.
5667698 REVERSIBLE FLOW SUPERCRITICAL REACTOR AND METHOD FOR OPERATING SAME Whiting Philip Milton, CANADA assigned to Abitibi-Price Inc A supercritical water oxidation reactor is described having first and second reaction zones connected in series and through which an aqueous feed stream to be oxidized can be passed in either direction. A self-contained heat exchange fluid system allows supercritical and subcritical temperatures to be maintained in either reaction zone. When supercritical
HYDROGEN GENERATION PROCESS Williamsville, NY, UNITED Couche Michael Rober STATES assigned to Praxair Technology Inc A process for the production of hydrogen that purifies a synthesis gas stream, containing hydrogen, carbon monoxide and combustibles, in a PSA unit. The PSA unit produces at least three streams: a substantially pure hydrogen product stream, a combustible-rich first tail-gas stream, and a carbon dioxide-rich second tail gas stream.
5670304 RECYCLING SPENT HYDROQUINONE DEVELOPER AND A RECYCLED HYDROQUINONE DEVELOPER Juers Daniel Frederic Fairport, NY, UNITED STATES assigned to E I Du Pont de Nemours and Company A process for recycling a spent hydroquinone developer for black-and-white photographic processing which comprises the steps of determining the volume of developer, optionally
PatentsAL.ERTIJournal of Cleaner Production 6 (1998) 65-83
70
filtering the developer, and reconstituting the developer, whereby the sp&t developer is brought back to substantially the same composition and/or level of performance as fresh developer wherein the recycled developer can be used to process black-and-white photographic materials without adverse effects.
5670345 BIOLOGICAL PRODUCTION OF HUMIC ACID AND CLEAN FUELS FROM COAL Srivastava Kailash Chandra; Walia Daman S Centreville, VA, UNITED STATES assigned fo Arctech Inc Coal is treated aerobically or anaerobically to produce humic acid, volatile fatty acids, lower alcohols, and/or methane using a consortium of bacteria designated Mic-1 or KSARCS6. This process can also be used to convert aromatic compounds, such as phenols and derivatives thereof, to methane and carbon dioxide.
5670552
5672245 RECYCLING OF KNOTS IN A CONTINUOUS PROCESS FOR COOKING CHEMICAL PULP Andtbacka Elisabet; Andtbacka Stig; Bergqvist Anders Karlstad, SWEDEN assigned to Kvaemer Pulping Technologies Aktiebolag PCT No. PCIXE94/01135 Sec. 37 1 Date Nov. 6,1995 Sec. 102(e) Date Nov. 6, 1995 PCT Filed Nov. 28, 1994 PCf Pub. No. WG9Y23257 PCf Pub. Date Aug. 3 1.1995. The present invention relates to a process for continuous cooking of chemical pulp, in which the chips are fed into a chip chute, which is arranged on top of a high pressure feeder for passing the chips into a downstream, pressurized continuous digester housing comprising a vertical, elongate digester into which the chips are fed at the top and from which the cooked pulp is fed out at the bottom, in order thereafter to be defibred and washed, after which the defibred pulp is screened, and an accepted flow of pulp is obtained which is fed onwards for continued treatment, and a reject flow is obtained which consists principally of knots, which reject flow is thus separatedoff from the pulp flow, the reject flow, which consists principally of knotsbeing returned to the chip chute, preferably after concentration and washing.
FOAM AND PROCESS FOR PRODUCING FOAM USING A CARBON DIOXIDE BLOWING AGENT Gusavage Gerald G; Schirmer Henry G; Hessen Thomas A Lancaster, PA, UNITED STATES assigned to W R Grace & Co -Corm The present invention provides a process for producing thermoplastic foam, including: (a) melting a thermoplastic polymer to produce a polymer melt; (b) introducing a carbon dioxide blowing agent into the polymer melt; (c) adding to the polymer melt one or more additives selected from the group consisting of (1) polysiloxane, and (2) mineral oil; and (d) extruding and foaming the melted polymer melt, blowing agent, and one or more additives to produce thermoplastic foam. The resultant thermoplastic foam can be thermoformed into various foamed articles, such as foam packaging trays. The quality of foams made from a carbon dioxide blowing agent, and particularly 100% carbon dioxide, has been found to be substantially improved by adding one or more of the foregoing additives, i.e., polysiloxane, mineral oil and, optionally, polyolefin to the polymer melt during the extrusion and foaming process. Such foams have far less ruptured cells, surface cracks and corrugation than comparable foams made with a carbon dioxide blowing agent but which lack the additives of the present invention.
5676255 METHOD OF RECYCLING MEDICAL INSTRUMENTS Flowers Jon Wad Albuquerque, NM, UNITED STATES assigned to Universal Recycling Inc A method of recycling medical instruments, especially surgical instruments. The decontaminated medical instruments are received and identified for processing. The analysis and construction of each type of instrument to identify the components and material compositions thereof are determined. A given type of instrument is then dismantled into pieces, which are then sorted by the material compositions thereof as ascertained in the previous determination of the analysis and construction of the instruments.
of Cleaner Production 6 (1998) 45-83
compounds from an air stream wherein airborne adsorbent material is mixed with contaminated exhaust air in a vertical main column. Volatile Organic Compounds (VOCs) within the exhaust air adhere to the adsorbent material and are thus removed from the air. The clean air exits the system and the saturated adsorbent material falls through the bottom of the main column and into a lower reservoir. The saturated adsorbent material is desorbed and recycled through the adsorber apparatus by being drawn up from the lower reservoir through a secondary column and deposited at the inlet to the main column. At the top end of the main column, the adsorbent material is once again dropped into the contaminated exhaust air flowing through the main column. This process is constant and adsorbent material is continuously being recycled through the system.
5667561 METHOD FOR SELECTIVE SEPARATION OF CARBON DIOXIDE FROM WASTE GAS OF COMBUSTION Suzuki Kenz; Inukai Keiich Aichi ken, JAPAN assigned to Agency of Industrial Science & Technology Ministry of International Trade & Industry
69
water oxidation is occuring in one reaction zone the effluent is being cooled to a subcritical temperahue and used to flush the second reaction zone to remove inorganic scale.
5667927 TONER FOR ELECTROPHOTOGRAPHY AND PROCESS FOR THE PRODUCTION THEREOF Kubota Hideyuki; Ozeki Eiichi Shizuoka, JAPAN assigned to Shimadu Corporation; Tomoegawa Paper Co Ltd A hydrolyzable biodegradable or for toner electrophotography, which permits the easy reclaiming and recycling of used copying paper, permits the easy deinking by an existing deinking system, can decrease environmental pollution caused by a toner waste, and has excellent toner properties owing to the uniform dispersion of additives, the toner containing, as a binder resin, a lactic acid-based resin of the formula (1), (*See Patent for Tabular Presentation*) PS wherein R is an alkali metal or an alkaline earth metal, and n is an integer of 10 to 20,000.
5669960 Selective separation and recovery of gaseous components of hot waste gas of combustion containing carbon dioxide is attained by causing the hot waste gas to contact an adsorbent containing as a substantial main component thereof an inorganic solid substance exhibiting surface basicity and inducing adsorption of the gaseous components of the hot waste gas on the adsorbent and then selectively separating the adsorbed gaseous components by virtue of differences in retention time among the gaseous components on the adsorbent.
5667698 REVERSIBLE FLOW SUPERCRITICAL REACTOR AND METHOD FOR OPERATING SAME Whiting Philip Milton, CANADA assigned to Abitibi-Price Inc A supercritical water oxidation reactor is described having first and second reaction zones connected in series and through which an aqueous feed stream to be oxidized can be passed in either direction. A self-contained heat exchange fluid system allows supercritical and subcritical temperatures to be maintained in either reaction zone. When supercritical
HYDROGEN GENERATION PROCESS Williamsville, NY, UNITED Couche Michael Rober STATES assigned to Praxair Technology Inc A process for the production of hydrogen that purifies a synthesis gas stream, containing hydrogen, carbon monoxide and combustibles, in a PSA unit. The PSA unit produces at least three streams: a substantially pure hydrogen product stream, a combustible-rich first tail-gas stream, and a carbon dioxide-rich second tail gas stream.
5670304 RECYCLING SPENT HYDROQUINONE DEVELOPER AND A RECYCLED HYDROQUINONE DEVELOPER Juers Daniel Frederic Fairport, NY, UNITED STATES assigned to E I Du Pont de Nemours and Company A process for recycling a spent hydroquinone developer for black-and-white photographic processing which comprises the steps of determining the volume of developer, optionally
PatentsAL.ERTIJournal of Cleaner Production 6 (1998) 65-83
70
filtering the developer, and reconstituting the developer, whereby the sp&t developer is brought back to substantially the same composition and/or level of performance as fresh developer wherein the recycled developer can be used to process black-and-white photographic materials without adverse effects.
5670345 BIOLOGICAL PRODUCTION OF HUMIC ACID AND CLEAN FUELS FROM COAL Srivastava Kailash Chandra; Walia Daman S Centreville, VA, UNITED STATES assigned fo Arctech Inc Coal is treated aerobically or anaerobically to produce humic acid, volatile fatty acids, lower alcohols, and/or methane using a consortium of bacteria designated Mic-1 or KSARCS6. This process can also be used to convert aromatic compounds, such as phenols and derivatives thereof, to methane and carbon dioxide.
5670552
5672245 RECYCLING OF KNOTS IN A CONTINUOUS PROCESS FOR COOKING CHEMICAL PULP Andtbacka Elisabet; Andtbacka Stig; Bergqvist Anders Karlstad, SWEDEN assigned to Kvaemer Pulping Technologies Aktiebolag PCT No. PCIXE94/01135 Sec. 37 1 Date Nov. 6,1995 Sec. 102(e) Date Nov. 6, 1995 PCT Filed Nov. 28, 1994 PCf Pub. No. WG9Y23257 PCf Pub. Date Aug. 3 1.1995. The present invention relates to a process for continuous cooking of chemical pulp, in which the chips are fed into a chip chute, which is arranged on top of a high pressure feeder for passing the chips into a downstream, pressurized continuous digester housing comprising a vertical, elongate digester into which the chips are fed at the top and from which the cooked pulp is fed out at the bottom, in order thereafter to be defibred and washed, after which the defibred pulp is screened, and an accepted flow of pulp is obtained which is fed onwards for continued treatment, and a reject flow is obtained which consists principally of knots, which reject flow is thus separatedoff from the pulp flow, the reject flow, which consists principally of knotsbeing returned to the chip chute, preferably after concentration and washing.
FOAM AND PROCESS FOR PRODUCING FOAM USING A CARBON DIOXIDE BLOWING AGENT Gusavage Gerald G; Schirmer Henry G; Hessen Thomas A Lancaster, PA, UNITED STATES assigned to W R Grace & Co -Corm The present invention provides a process for producing thermoplastic foam, including: (a) melting a thermoplastic polymer to produce a polymer melt; (b) introducing a carbon dioxide blowing agent into the polymer melt; (c) adding to the polymer melt one or more additives selected from the group consisting of (1) polysiloxane, and (2) mineral oil; and (d) extruding and foaming the melted polymer melt, blowing agent, and one or more additives to produce thermoplastic foam. The resultant thermoplastic foam can be thermoformed into various foamed articles, such as foam packaging trays. The quality of foams made from a carbon dioxide blowing agent, and particularly 100% carbon dioxide, has been found to be substantially improved by adding one or more of the foregoing additives, i.e., polysiloxane, mineral oil and, optionally, polyolefin to the polymer melt during the extrusion and foaming process. Such foams have far less ruptured cells, surface cracks and corrugation than comparable foams made with a carbon dioxide blowing agent but which lack the additives of the present invention.
5676255 METHOD OF RECYCLING MEDICAL INSTRUMENTS Flowers Jon Wad Albuquerque, NM, UNITED STATES assigned to Universal Recycling Inc A method of recycling medical instruments, especially surgical instruments. The decontaminated medical instruments are received and identified for processing. The analysis and construction of each type of instrument to identify the components and material compositions thereof are determined. A given type of instrument is then dismantled into pieces, which are then sorted by the material compositions thereof as ascertained in the previous determination of the analysis and construction of the instruments.