| Patents for A62D 3 - Processes for making harmful chemical substances harmless, or less harmful, by effecting a chemical change in the substances (9,310) |
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| 10/10/1991 | DE4019982A1 Treating heavy metal-contg. industrial waste - with sodium poly:thio:carbonate soln. to remove heavy metal content |
| 10/09/1991 | EP0451006A1 Process for incinerating waste |
| 10/09/1991 | EP0449957A1 A method for stimulating biodegradation of halogenated aliphatic hydrocarbons |
| 10/08/1991 | US5055167 Method for the complete utilization of high polymer waste products |
| 10/07/1991 | WO1991015444A1 Removal of organochlorides |
| 10/06/1991 | WO1991015117A1 Film-forming proteinaceous emulsion |
| 10/06/1991 | CA2079900A1 Film-forming proteinaceous emulsion |
| 10/02/1991 | EP0448976A2 The use of an amorphous alloy catalyst for decomposition of chlorofluorocarbons |
| 10/02/1991 | EP0448660A1 Conversion of organic/organometallic gaseous or vaporizable compounds into inert solids |
| 10/01/1991 | WO1991015248A1 Method and apparatus for treating hazardous waste or other hydrocarbonaceous material |
| 10/01/1991 | CA2079332A1 Method and apparatus for treating hazardous waste or other hydrocarbonaceous material |
| 09/26/1991 | DE4009447A1 Processing waste salts, dusts and sludges - to give dust-like product suitable for dumping |
| 09/25/1991 | EP0447530A1 Treatment of hazardous waste material. |
| 09/25/1991 | EP0420975A4 Degradation of polychlorinated biphenyls |
| 09/24/1991 | US5051030 Chemical detoxification process for treatment of soils contaminated with halogenated organic compounds |
| 09/24/1991 | US5050511 Reduction of organic waste,transferring and cooling, condensation followed by recycling |
| 09/24/1991 | CA1289334C Process for destroying organic products with toxic effects and equipment for implementing this process |
| 09/19/1991 | WO1991013701A1 Spent pot liner treatment process |
| 09/19/1991 | WO1991009650A3 Process and device for disposing of substances containing halogenated hydrocarbon compounds |
| 09/12/1991 | DE4007270A1 Mercury sepn. from solids e.g. soil - by contact with additional mercury, and density sepn. |
| 09/10/1991 | WO1991013667A1 Sludge treatment process |
| 09/10/1991 | US5046436 Apparatus and method for the preheating of liquid wastes in a waste disposal process |
| 09/10/1991 | CA1288579C Destruction of organic hazardous waste |
| 09/05/1991 | WO1991013532A1 Plasmatron with steam as the plasma gas and process for stable operation of the plasmatron |
| 09/03/1991 | CA1288441C Process for the chemicothermal decomposition of halohydrocarbons |
| 09/03/1991 | CA1288381C Method and apparatus for the controlled reduction of organic material |
| 09/03/1991 | CA1288217C Process for the removal of organic contaminants from soils and sediment |
| 08/27/1991 | US5043496 Process for the treatment of heavy chlorination residues |
| 08/27/1991 | US5043054 Mixture of 1A, 2A, 3A hydroxides and 2-methoxyethanol |
| 08/22/1991 | WO1991012052A1 Process for environmentally safe disposal of noxious solid, liquidand/or gaseous substances at temperatures of 400 to 1800 degrees |
| 08/22/1991 | DE4005436A1 Incinerator ash and filter dust treatment - adds water at mixing or conveyor assemblies after the separators to prevent gas development after reaction heating |
| 08/22/1991 | DE4005002A1 Processing contaminated metal scrap - esp. transformers contg. PCB coolants |
| 08/21/1991 | EP0442088A1 Process for the oxidation of water insoluble organic compounds |
| 08/20/1991 | US5041277 Method for treating asbestos |
| 08/14/1991 | DE4004201A1 Disposal of harmful matter esp. asbestos waste - by melting with coal or coke and flux giving prods. useful for making building material and in metallurgy |
| 08/13/1991 | US5039350 Method for the decomposition of halogenated organic compounds in a contaminated medium |
| 08/06/1991 | US5037618 Oxidation chamber |
| 08/06/1991 | US5037560 Sludge treatment process |
| 08/06/1991 | US5037524 Apparatus for treating liquids with high-intensity pressure waves |
| 08/06/1991 | US5037479 Treating cadmium and lead with reactive carbonates, phosphates and borates to convert to nonleachable form |
| 08/01/1991 | DE4002591A1 Volatile solvent extn. from waste in two=stage(s) - involves mixing with free-flowing absorbent solids |
| 07/31/1991 | EP0398889A4 Degradation of organochlorines |
| 07/30/1991 | US5035809 Controlling water pollution |
| 07/30/1991 | US5035784 Decomposition of polychlorinated biphenyls, irradiation with ultraviolet radiation |
| 07/30/1991 | US5035537 Method of decontaminating soil, porous rock and the like |
| 07/25/1991 | WO1991010478A1 Waste treatment |
| 07/25/1991 | DE4001782A1 Oxidn. of chlorinated organic pollutants - by reaction with nitric acid at high temp. and pressure |
| 07/25/1991 | DE4001230A1 Leach-resistant binding of finely divided inorganic waste - by reaction with reactive silicic acid |
| 07/16/1991 | US5032291 Catalytic reduction of nitro- and nitroso- substituted compounds |
| 07/16/1991 | US5032241 Fluid purification |
| 07/16/1991 | CA1286325C Hazardous waste reactor system |
| 07/16/1991 | CA1286087C Process for cleaning of waste materials by refining and/or elimination of biologically difficult to degrade halogen-, nitrogen- and/or sulfur compounds |
| 07/11/1991 | WO1991009823A1 Photocatalytic process for degradation of organic materials in a vaporized or gaseous state |
| 07/11/1991 | WO1991009808A1 Reactive compositions containing superoxide ion for the degradation of halogenated organic compounds |
| 07/11/1991 | WO1991009650A2 Process and device for disposing of substances containing halogenated hydrocarbon compounds |
| 07/09/1991 | US5030422 Laser breakdown of particles |
| 07/03/1991 | EP0435210A2 Method for the preparation of methyl chloride |
| 07/02/1991 | US5028452 Closed loop system and process for conversion of gaseous or vaporizable organic and/or organo-metallic compounds to inert solid matrix resistant to solvent extraction |
| 06/27/1991 | WO1991008986A1 Method of disposal and degradation of toxic organic compounds |
| 06/27/1991 | WO1991008813A1 System for and method of decontaminating a contaminated fluid by using photocatalytic particles |
| 06/27/1991 | DE3942962A1 Verfahren zum entsorgen von substanzen, die halogenierte kohlenwasserstoffverbindungen oder gemische davon enthalten, und vorrichtung zur durchfuehrung des verfahrens A method for disposing of substances that contain halogenated hydrocarbon compounds or mixtures thereof, and apparatus for performing the method |
| 06/26/1991 | EP0433600A2 Method for waste water free working up of residues from a chlorosilane distillation with calcium bases or calcium carbonate |
| 06/26/1991 | EP0338060B1 Method for stabilizing, solidifying and storing waste material |
| 06/26/1991 | CN1052440A Treatment of hazardous waste material |
| 06/25/1991 | US5026735 Polyhydroxy polymer complexed with borax |
| 06/25/1991 | US5026484 Continuous flow method for processing liquids using high-energy discharge |
| 06/25/1991 | US5026464 Method and apparatus for decomposing halogenated organic compound |
| 06/25/1991 | US5026432 Vacuum; pneumatic airstream; continuous collection; closed system, hazardous materials; polychlorinated biphenyls |
| 06/23/1991 | CA2032902A1 Reactive compositions containing superoxide ion for the degradation of halogenated organic compounds |
| 06/20/1991 | DE3941827A1 Chloro-silane distn. residue conversion to solid suitable for dumping - by treatment with excess calcium base and sepn., liquor being recycled |
| 06/20/1991 | DE3940903A1 Toxic waste esp. halogenated organic and heavy metal disposal - by fixing with synthetic calcium hydro-silicate and opt. calcium aluminosilicate |
| 06/19/1991 | EP0432323A1 Simultaneous Hydrodehalogenation of two streams containing halogenated organic compounds |
| 06/13/1991 | WO1991008023A1 A method for the destruction of halogen-containing substances |
| 06/13/1991 | DE3940567A1 Treating gasifying toxic materials in heated fluidised beds - before further action on potentially dangerous solid residues |
| 06/11/1991 | US5023317 Sulfurizaton in oxygen-free atmosphere;pyropolymers |
| 06/11/1991 | US5022848 Apparatus and method for heating a waste disposal system |
| 06/06/1991 | WO1991008038A1 Method and apparatus for effecting gas-liquid contact |
| 06/06/1991 | DE4035782A1 Safe disposal of rubber coating soln. with tolueneharmful gases - in which soln. is coated onto heated drum in inert atmos. and cured to rubber strip while toluene is evaporated and collected |
| 06/06/1991 | DE4001015C1 Decontamination process - comprises contacting contaminated material with formaldehyde-casein or - caseinate |
| 06/06/1991 | DE3939474A1 Use of polyethylene imine for inhibition of nitrosamine formation - in body care prepns., cutting fluid and hydraulic oils by neutralising acidic components |
| 06/04/1991 | US5021383 Metals or metal oxides impregnated in alkali or alkaline earth carbonates and bicarbonates |
| 05/28/1991 | US5019237 Metal-ion vapor accelerator cell |
| 05/28/1991 | US5019195 Applying adhesive, then fibrous material, them additional adhesive; hazardous materials |
| 05/28/1991 | US5019175 Polyethylene Glycol, Alkali Metal Hydroxide |
| 05/22/1991 | EP0428309A2 Waste treatment |
| 05/16/1991 | WO1991006343A1 A method of removing heavy metals form soil, sludge, compost and similar materials |
| 05/16/1991 | DE3937312A1 Solvent-resistant product for use in dam construction - made by mixing waste prodn. from some chemical processes |
| 05/14/1991 | US5015457 Process for the hydrogenation of organochlorine compounds, neutralization of the hydrochloric acid obtained and a neutralization agent for hydrochloric acid obtained from organochlorine compounds |
| 05/08/1991 | EP0426216A1 Method for processing residual baths from the photographic and photochemical industries |
| 05/08/1991 | DE3941951A1 Combined chemical-biological treatment of contaminated waste - has washing reaction operating intermittently |
| 05/08/1991 | DE3936744A1 Catalytic oxidative decomposition of halogenated organic cpds. - by passing cpd. mixed with oxygen and gas which burns in oxygen through fluidised bed of catalyst |
| 05/07/1991 | US5013424 Process for the simultaneous hydrogenation of a first feedstock comprising hydrocarbonaceous compounds and having a non-distillable component and a second feedstock comprising halogenated organic compounds |
| 05/07/1991 | CA1283872C Process for the degradation of environmentally persistent organic compounds |
| 05/03/1991 | WO1991006601A1 Biodegradable polymeric materials and articles fabricated therefrom |
| 05/03/1991 | CA2067229A1 Biodegradable polymeric materials and articles fabricated therefrom |
| 05/02/1991 | EP0424865A2 Removal of dioxins and furans |
| 04/30/1991 | US5010829 Method and apparatus for treatment of hazardous waste in absence of oxygen |
| 04/23/1991 | US5009745 Treating cellulose-containing wastes |
| 04/18/1991 | WO1991005026A1 Oil treatment method |
| 04/18/1991 | DE3933809A1 Verfahren zur entsorgung von abfallstoffen A method for disposal of waste materials |