- Email: [email protected]
4666612 Method for recovering a wood preservative from waste sludges
IV
New Patents
4666494 METHOD OF PREPARING A SUCTION MOLD FOR RECEIVING VITRIFIED RADIOACTIVE WASTE MATERIALS AND APPARATUS THEREFOR
purity silver is obtained from the AgC1 containing residue by leaching with an alkaline ammoniacal solution to dissolve the silver as the soluble silver diamine chloride, and subsequently reducing the silver diamine chloride to silver metal. The reducing agent for the silver diamine chloride is preferably either a Cu£30 + 0 + L containing compound such as CuCI or a metal powder such as copper or bronze powder. + RE. + RE
Detlef Stritzke, Eckhart Ewest, Mol, Belgium assigned to Deutsche Gesellschaft fur Wiederaufarbeitung von Kernbrennstoffen mbH Suction molds used in the suction removal process must first be prepared before they can receive vitrified radioactive waste materials. A method is disclosed for preparing the suction mold which includes a suction pipe welded into the base of the mold with a desired-break location whereat the suction pipe is broken off during the suction removal process. An evacuation stub is mounted in the mouth of the suction pipe and communicates with the interior of the mold. The method of the invention includes evacuating the mold through the evacuation stub and then heating the mold to remove moisture and organic impurities. The mold is then filled with a dry inert gas and the evacuation stub is cleaned. The mold is then evacuated to a predetermined residual pressure. Thereafter, the evacuation stub is cold-press welded so as to close off the interior of the mold from the ambient.
4666514 HYDROMETALLURGICAL PROCESS FOR RECOVERING SILVER FROM COPPERELECTROLYSIS ANODE SLUDGE Josef Bertha, Brixlegg, Austria assigned to Austria Metall Aktiengesellschaft A hydrometallurgical process for recovering pure silver from sludge formed at the anode in copper electrolysis and other sources comprises suspending the sludge, after removing Pb, Ni, and Cu, in hydrochloric acid, subsequently adding an alkali metal hypochlorite, preferably NaOC1, to the resulting suspension to convert the silver present to AgCI, filtering to separate the AgCI containing solid residue from the filtrate containing the other metallic elements, and finally working up the AgC1 containing residue to obtain high purity silver. Preferably the high
4666585 DISPOSAL OF PETROLEUM SLUDGE Dale A Figgins, J Jay Grove assigned to Atlantic Richfield Company A process for producing delayed petroleum coke wherein petroleum sludge is added to liquid hydrocarbon coker feedstock.
4666612 METHOD FOR RECOVERING A WOOD PRESERVATIVE FROM WASTE SLUDGES Donald G Hoffman, Thomas Hurst assigned to Kerr-McGee Chemical Corporation The present invention provides a method for the recovery of a wood preservative chemical from aqueous waste sludges containing said wood preservative chemical in both its liquid and solid phases. The method comprises treating said aqueous waste sludges to effect an initial separation and recovery of the liquid and solid phases, individually. The recovered liquid phase comprises the first liquid phase product stream. The recovered solid phase then is subjected to elevated temperatures sufficient to liquefy the solid phase, said liquefied solid phase comprising the second liquid phase product stream. During the liquefaction of the recovered solid phase, it may be contacted with a quantity of a fresh wood preservative chemical, a portion of a dehydrated first liquid phase product stream or a portion of a dehydrated second liquid phase product stream to prevent the precipitation of any normally solid constituents therein and to enhance the liquefaction of said recovered solid phase.
New Patents
4666494 METHOD OF PREPARING A SUCTION MOLD FOR RECEIVING VITRIFIED RADIOACTIVE WASTE MATERIALS AND APPARATUS THEREFOR
purity silver is obtained from the AgC1 containing residue by leaching with an alkaline ammoniacal solution to dissolve the silver as the soluble silver diamine chloride, and subsequently reducing the silver diamine chloride to silver metal. The reducing agent for the silver diamine chloride is preferably either a Cu£30 + 0 + L containing compound such as CuCI or a metal powder such as copper or bronze powder. + RE. + RE
Detlef Stritzke, Eckhart Ewest, Mol, Belgium assigned to Deutsche Gesellschaft fur Wiederaufarbeitung von Kernbrennstoffen mbH Suction molds used in the suction removal process must first be prepared before they can receive vitrified radioactive waste materials. A method is disclosed for preparing the suction mold which includes a suction pipe welded into the base of the mold with a desired-break location whereat the suction pipe is broken off during the suction removal process. An evacuation stub is mounted in the mouth of the suction pipe and communicates with the interior of the mold. The method of the invention includes evacuating the mold through the evacuation stub and then heating the mold to remove moisture and organic impurities. The mold is then filled with a dry inert gas and the evacuation stub is cleaned. The mold is then evacuated to a predetermined residual pressure. Thereafter, the evacuation stub is cold-press welded so as to close off the interior of the mold from the ambient.
4666514 HYDROMETALLURGICAL PROCESS FOR RECOVERING SILVER FROM COPPERELECTROLYSIS ANODE SLUDGE Josef Bertha, Brixlegg, Austria assigned to Austria Metall Aktiengesellschaft A hydrometallurgical process for recovering pure silver from sludge formed at the anode in copper electrolysis and other sources comprises suspending the sludge, after removing Pb, Ni, and Cu, in hydrochloric acid, subsequently adding an alkali metal hypochlorite, preferably NaOC1, to the resulting suspension to convert the silver present to AgCI, filtering to separate the AgCI containing solid residue from the filtrate containing the other metallic elements, and finally working up the AgC1 containing residue to obtain high purity silver. Preferably the high
4666585 DISPOSAL OF PETROLEUM SLUDGE Dale A Figgins, J Jay Grove assigned to Atlantic Richfield Company A process for producing delayed petroleum coke wherein petroleum sludge is added to liquid hydrocarbon coker feedstock.
4666612 METHOD FOR RECOVERING A WOOD PRESERVATIVE FROM WASTE SLUDGES Donald G Hoffman, Thomas Hurst assigned to Kerr-McGee Chemical Corporation The present invention provides a method for the recovery of a wood preservative chemical from aqueous waste sludges containing said wood preservative chemical in both its liquid and solid phases. The method comprises treating said aqueous waste sludges to effect an initial separation and recovery of the liquid and solid phases, individually. The recovered liquid phase comprises the first liquid phase product stream. The recovered solid phase then is subjected to elevated temperatures sufficient to liquefy the solid phase, said liquefied solid phase comprising the second liquid phase product stream. During the liquefaction of the recovered solid phase, it may be contacted with a quantity of a fresh wood preservative chemical, a portion of a dehydrated first liquid phase product stream or a portion of a dehydrated second liquid phase product stream to prevent the precipitation of any normally solid constituents therein and to enhance the liquefaction of said recovered solid phase.