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| Number | Title | Issue Date |
| 7290959 | Electrode heating with remediation agent A remediation method and system is disclosed. A plurality of conductors is installed into the subsurface to introduce electrical current to produce heat in the subsurface. One or more agents are released into the subsurface to cause or accelerate the decomposition o... | 11/06/2007 |
| 7211038 | Methods for melting of materials to be treated A process for melting material to be treated includes placing material to be treated in a container that may include an insulating lining, heating the material to be treated and melting the material to be treated, preferably allowing the melted material to cool to f... | 05/01/2007 |
| 7114880 | Process for the excavation of buried waste Disclosed is a method of excavating large quantities of non-homogenous radioactive contaminated waste, desirably without releasing radioactive contaminated dust or exposing personnel to its hazards. The excavation of buried waste is performed in the presence of a su... | 10/03/2006 |
| 6945734 | In-situ thermochemical solidification of dense non-aqueous phase liquids A method for in-situ dense non-aqueous phase liquids treatment in which a subsurface source area comprising at least one rapid release contaminant is located and free water removed therefrom. The subsurface source area is then heated to a temperature suitable for ex... | 09/20/2005 |
| 6527691 | In situ formation of magnetite reactive barriers in soil for waste stabilization Reactive barriers containing magnetite and methods for making magnetite reactive barriers in situ in soil for sequestering soil contaminants including actinides and heavy metals, organic materials, iodine and technetium are disclosed. According to one emb... | 03/04/2003 |
| 6143139 | Method for recovering metals from waste A method for recovering metals from metals-containing wastes, and vitrifying the remainder of the wastes for disposal. Metals-containing wastes such as circuit boards, cathode ray tubes, vacuum tubes, transistors and so forth, are broken up and placed in ... | 11/07/2000 |
| 6120430 | Method of melting solid materials A method of melting solid materials while controlling melt shape, without the expenditure of energy to melt unwanted quantities of surrounding materials, and an apparatus to effect the method. The method comprises the use of a planar starter path between ... | 09/19/2000 |
| 5969208 | Method of making pollutant harmless and apparatus for conducting the method This invention relates to a method of making a pollutant harmless by treating a material to be treated containing the pollutant. The method comprises the steps of: heating the material in a pressure resistant vessel hermetically to obtain a heated materia... | 10/19/1999 |
| 5961679 | Recovery of fissile materials from nuclear wastes A process for recovering fissile materials such as uranium, and plutonium, and rare earth elements, from complex waste feed material, and converting the remaining wastes into a waste glass suitable for storage or disposal. The waste feed is mixed with a d... | 10/05/1999 |
| 5910093 | Starter tube for use in vitrification process The invention disclosed here is a starter tube for initiating a vitrification process for melting contaminated soils, waste products, and hazardous materials. The starter tube comprises a tubular sheath made of a flexible material. Received within the she... | 06/08/1999 |
| 5908267 | Treating non-naturally occurring subsurface soil contaminants with pneumatic injection of dry media A method for pneumatically fracturing a soil formation, and thereafter utilizing or maintaining the fracture network thus formed by continuous injection of a gas stream into the fracture network, and introducing into that gas stream dry media which is ent... | 06/01/1999 |
| 5891011 | Vitrification of waste A method for encapsulating and immobilizing waste for disposal. Waste, preferably, biologically, chemically and radioactively hazardous, and especially electronic wastes, such as circuit boards, are placed in a crucible and heated by microwaves to a tempe... | 04/06/1999 |
| 5664911 | Method and apparatus for in situ decontamination of a site contaminated with a volatile material A method for removing a contaminant from a treatment region of a contaminated region of a site in the earth having water therein and being contaminated with the contaminant includes heating the earth by establishing an electric field through the treatment... | 09/09/1997 |
| 5637127 | Plasma vitrification of waste materials This invention provides a process wherein hazardous or radioactive wastes in the form of liquids, slurries, or finely divided solids are mixed with finely divided glassformers (silica, alumina, soda, etc.) and injected directly into the plume of a non-tra... | 06/10/1997 |
| 5616160 | Process for vitrifying incinerator ash The invention relates to a process of eliminating high chloride-containing incinerator ash and incinerator ash-residue mixtures, without generating excessive heavy metal-containing effluents during the actual vitrification of the ash. The process involves... | 04/01/1997 |
| 5564861 | Thermal method of in-situ soil treatment A thermal method of in-situ soil treatment using a charge of combustible substrate placed within the area to be treated and combusted with the use of oxidizer resulting in solid products and generating no gases. The substrate can be a metal, such as alumi... | 10/15/1996 |
| 5545804 | Metal fixation in oily waste contaminated soil using microwave radiation acting on in-situ produced coupling agent Heavy metals contaminants in soils are fixed and rendered non-leachable by the process of heating the metal contaminated soil containing a hydrocarbon liquid, at an elevated temperature sufficient to convert at least a part of the liquid hydrocarbon into ... | 08/13/1996 |
| 5545803 | Heating of solid earthen material, measuring moisture and resistivity The present invention includes a method of treating solid earthen material having volatile, semi-volatile, and non-volatile contaminants that utilizes electrical energy. A plurality of electrodes are inserted into a region of earthen material to be treate... | 08/13/1996 |
| 5494376 | Method and apparatus for controlling in situ waste remediation An in situ waste treatment system for contaminated soil employs a high temperature energy probe which is lowered into a borehole casing that has been inserted into the contaminated soil. The energy probe is activated and then melts surrounding region of t... | 02/27/1996 |
| 5482402 | Method and apparatus for heating subsurface soil for decontamination A technique for in situ decontamination of an earth formation. High gas temperatures can be achieved at subsurface formations by supplying a fuel at a subsurface location, such as at the bottom of a wellbore. Pressurized air or gas preheated to a temperat... | 01/09/1996 |
| 5478389 | Pollution remedial composition and its preparation Pollution remedial compositions are disclosed which comprise a soluble silicate, a surfactant, a polyol, and water.... | 12/26/1995 |
| 5376171 | Small particle size lightweight aggregate A process for producing micropellets of lightweight aggregate having a substantially spheroidal configuration which includes continuously mixing ceramic clay and liquid in a high speed rotating pin mixer to encapsulate substantially all other non-volatile... | 12/27/1994 |
| 5347070 | Treating of solid earthen material and a method for measuring moisture content and resistivity of solid earthen material The present invention includes a method of treating solid earthen material having volatile, semi-volatile and non-volatile contaminants. Six electrodes are inserted into a region of earthen material to be treated in a substantially equilateral hexagonal a... | 09/13/1994 |
| 5276253 | In-situ remediation and vitrification of contaminated soils, deposits and buried materials A method is disclosed in which a plasma arc torch is used to vitrify and remediate a site containing contaminated soils, resulting from a hazardous material deposit or spill, or contaminated buried objects. The contaminated earthen material or subterranea... | 01/04/1994 |
| 5273566 | Process for producing an environmentally acceptable abrasive product from hazardous wastes A method and apparatus of reclaiming hazardous inorganic wastes to produce an environmentally benign abrasive for use in loose grain processes, as a coated or bonded abrasive, or as a polishing grain. A tough and useful abrasive, with a MOH hardness of 7 ... | 12/28/1993 |
| 4913065 | In situ thermal waste disposal system An in situ system for thermally cleansing hazardous and toxic waste disposal sites is disclosed. The system includes a perimeter wall extending into the site which is sealed to a roof structure surrounding the site to encapsulate the site. A plurality of ... | 04/03/1990 |
| 4376598 | In-situ vitrification of soil A method of vitrifying soil at or below a soil surface location. Two or more conductive electrodes are inserted into the soil for heating of the soil mass between them to a temperature above its melting temperature. Materials in the soil, such as buried w... | 03/15/1983 |
