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5536387 Silver removal
PatentsALERT
5536371 PAPERMAKING SLUDGE RECOVERY PROCESS AND APPARATUS Verhoff Charles R, Deshler, OH, UNITED STATES assigned to The Onix Corporation A process and an apparatus for recovering clay and fiber from papermaking sludge. The sludge is dried, milled, and separated into distinct clay and fiber components. The fiber component of the sludge is then used as an alternative fuel source. The clay component can be used as recycle into the papermaking process, a masonry additive, or for any other suitable purpose.
Effluent stmams from photographic processes contain both silver and thiosulphate ions, and because of the formation of complex anions it is difficult to remove the silver. The silver may be removed using a cell with a cathode exposed to the effluent liquid, and an anode separated from the liquid by a barrier permeable at least to anions. Some silver sulphide is formed electrochemically at the cathode; at the anode water is electrolysed and becomes acidic, so the complex anions migrating through the barrier generate silver sulphide chemically. The resulting silver sulphide precipitate is separated from the liquid by a filter.
5536391
5536373
PRODUCTION OF CLEAN DISTILLATE FUELS FROM HEAVY CYCLE OILS
RECYCLE PROCESSING OF BALED WASTE MATERIAL
Howley Paul A; Jablonski Gregory A; Rollmann L Deane; Timken Hye, K C Media, UNITED STATES
Carlson Willard E; Storkel Ivar H, Palm Beach Gardens, FL, UNITED STATES An improved method of processing baled waste material containing waste paper having fibers contaminated to various degrees for recovering usable cellulosic fiber pulp from the bale in which the bale contents are impregnated with a fiber swelling and debonding fluid by enclosing the bale within a closed chamber and subjecting the chamber and contained bale to multiple pressure environmental conditions, that preferably includes a vacuum, while submerging the bale in the debonding fluid. The impregnated bale contents are allowed to soak for a sufficient period that the lesser degree contaminated fibers become swollen after which the bale is subjected to a sufficiently low degree of pulping agitation as initiates separation of the swollen fibers without significant damage to the fibers and which does not significantly decrease the sheet size of higher degree contaminated bonded fibers and other contaminants. The agitated bale contents are separated in a screen separator into a pulp containing slurry and a reject mass of higher degree contaminated, unswollen fibers and contaminants. If the reject mass contains a significant degree of fibrous material, it is compressed into bale form and again subjected to a multiple pressure liquid impregnation treatment in a closed chamber after which the multiple pressure impregnated bale is subjected to the same or similar recycling operations in separating out the fiber pulp slurry.
5536387 SILVER REMOVAL Hill Michael R H; Neville Mark; Turner Andrew D, UNITED KINGDOM assigned to United Kingdom Atomic Energy Authority
This invention discloses an enhanced process for the hydroprocessing of a feed, the feed comprising a highly aromatic refinery distillate stream boiling in the range between 300 degrees and 900 degrees F. The feed is separated into light and heavy streams such that the light stream contains from 0.1 to 5 wt. % dibenzothiophene, substituted dibenzothiophenes, and heavier polycyclic thiophenes. The lighter stream is hydrotreated at pressures from 300 degrees to 1000 degrees F. with a commercial catalyst having a hydrogenation component. The heavier stream is treated in the presence of hydrogen at higher pressure, from 600 to 2000 psig with a catalyst comprising active material having a Constraint Index of less than 2 in addition to a hydrogenation component in order to achieve over 35% conversion of material boiling above 630 degrees F. The active material of the catalyst is a highly siliceous zeolite or an acidic amorphous silica-alumina material.
5536400 APPARATUS FOR PURIFYING FLUIDS WITH UV RADIATION AND OZONE Schultz Jeffrey L, Hollywood, UNITED STATES assigned to Aqua Care Systems Inc A method and apparatus for purifying fluids with ozone and ultraviolet radiation. A housing defining an ozone creation chamber having a plurality of ultraviolet radiation sources disposed circumferentially around the inner surface of the housing is provided. Oxygen containing gas, such as ambient air, is directed to flow within the housing. An effluent conduit of ultraviolet radiation permeable material is disposed coaxially within the housing. A venturi is disposed within the effluent conduit. An ozone gas discharge conduit is connected between the ozone creation
J. Cleaner Prod.,
1996, Volume 4, Number
3-4
257
5536371 PAPERMAKING SLUDGE RECOVERY PROCESS AND APPARATUS Verhoff Charles R, Deshler, OH, UNITED STATES assigned to The Onix Corporation A process and an apparatus for recovering clay and fiber from papermaking sludge. The sludge is dried, milled, and separated into distinct clay and fiber components. The fiber component of the sludge is then used as an alternative fuel source. The clay component can be used as recycle into the papermaking process, a masonry additive, or for any other suitable purpose.
Effluent stmams from photographic processes contain both silver and thiosulphate ions, and because of the formation of complex anions it is difficult to remove the silver. The silver may be removed using a cell with a cathode exposed to the effluent liquid, and an anode separated from the liquid by a barrier permeable at least to anions. Some silver sulphide is formed electrochemically at the cathode; at the anode water is electrolysed and becomes acidic, so the complex anions migrating through the barrier generate silver sulphide chemically. The resulting silver sulphide precipitate is separated from the liquid by a filter.
5536391
5536373
PRODUCTION OF CLEAN DISTILLATE FUELS FROM HEAVY CYCLE OILS
RECYCLE PROCESSING OF BALED WASTE MATERIAL
Howley Paul A; Jablonski Gregory A; Rollmann L Deane; Timken Hye, K C Media, UNITED STATES
Carlson Willard E; Storkel Ivar H, Palm Beach Gardens, FL, UNITED STATES An improved method of processing baled waste material containing waste paper having fibers contaminated to various degrees for recovering usable cellulosic fiber pulp from the bale in which the bale contents are impregnated with a fiber swelling and debonding fluid by enclosing the bale within a closed chamber and subjecting the chamber and contained bale to multiple pressure environmental conditions, that preferably includes a vacuum, while submerging the bale in the debonding fluid. The impregnated bale contents are allowed to soak for a sufficient period that the lesser degree contaminated fibers become swollen after which the bale is subjected to a sufficiently low degree of pulping agitation as initiates separation of the swollen fibers without significant damage to the fibers and which does not significantly decrease the sheet size of higher degree contaminated bonded fibers and other contaminants. The agitated bale contents are separated in a screen separator into a pulp containing slurry and a reject mass of higher degree contaminated, unswollen fibers and contaminants. If the reject mass contains a significant degree of fibrous material, it is compressed into bale form and again subjected to a multiple pressure liquid impregnation treatment in a closed chamber after which the multiple pressure impregnated bale is subjected to the same or similar recycling operations in separating out the fiber pulp slurry.
5536387 SILVER REMOVAL Hill Michael R H; Neville Mark; Turner Andrew D, UNITED KINGDOM assigned to United Kingdom Atomic Energy Authority
This invention discloses an enhanced process for the hydroprocessing of a feed, the feed comprising a highly aromatic refinery distillate stream boiling in the range between 300 degrees and 900 degrees F. The feed is separated into light and heavy streams such that the light stream contains from 0.1 to 5 wt. % dibenzothiophene, substituted dibenzothiophenes, and heavier polycyclic thiophenes. The lighter stream is hydrotreated at pressures from 300 degrees to 1000 degrees F. with a commercial catalyst having a hydrogenation component. The heavier stream is treated in the presence of hydrogen at higher pressure, from 600 to 2000 psig with a catalyst comprising active material having a Constraint Index of less than 2 in addition to a hydrogenation component in order to achieve over 35% conversion of material boiling above 630 degrees F. The active material of the catalyst is a highly siliceous zeolite or an acidic amorphous silica-alumina material.
5536400 APPARATUS FOR PURIFYING FLUIDS WITH UV RADIATION AND OZONE Schultz Jeffrey L, Hollywood, UNITED STATES assigned to Aqua Care Systems Inc A method and apparatus for purifying fluids with ozone and ultraviolet radiation. A housing defining an ozone creation chamber having a plurality of ultraviolet radiation sources disposed circumferentially around the inner surface of the housing is provided. Oxygen containing gas, such as ambient air, is directed to flow within the housing. An effluent conduit of ultraviolet radiation permeable material is disposed coaxially within the housing. A venturi is disposed within the effluent conduit. An ozone gas discharge conduit is connected between the ozone creation
J. Cleaner Prod.,
1996, Volume 4, Number
3-4
257