Abstract: The invention relates to a process for the preparation of styrene monomers by depolymerising polystyrene, to a device for carrying out the process and to the use of a fluidised bed reactor for the depolymerisation of polystyrene. Said process comprising the following steps: a) feeding a polymer composition (A) containing 60 to 99.9 wt. polystyrene, based on the total weight of the polymer composition (A), into the reaction zone (R) of a pyrolysis reactor (P); b) thermally cracking the polystyrene contained in the polymer composition (A) in the reaction zone (R) of the pyrolysis reactor (P) at a temperature of between 400° C. to 1000° C.

Abstract: This invention relates to the field of contaminated plastic waste decomposition. More specifically, the invention comprises methods and systems to decompose contaminated plastic waste and transform it into value-added products.

Abstract: The present invention provides a process of catalytic depolymerization of polystyrene involving a spherical catalyst, an apparatus for carrying out the depolymerization, recovering the aromatic rich liquid product and recycling the catalyst without any decrease in the catalytic performance. Further, the present invention provides that the aromatic rich liquid product includes styrene, xylene, benzene, ethyl benzene, with styrene content greater than 65%. Additionally, the catalyst involved in the depolymerization process is a spherical catalyst that is easily recovered from coke/char formed during the process and is recycled and reused without any decrease in the catalytic performance.

Abstract: Various trash can assembly embodiments are disclosed. The trash can assembly can include a body, a lid, an actuation system, and an active dislodgement or return system. The active dislodgement or return system can be configured to facilitate dislodging the trash can assembly from a surrounding environment, such as a wall. The active dislodgement or return system can include a dynamic member having a frame, a foot movably coupled to the frame, and a spring applying a force on the foot. When an actuation force is removed from the actuation system, the dynamic member can apply a force against the surrounding environment, such as a floor, to move the body relative to the surrounding environment.

Abstract: A process for the depolymerization of waste plastic material and a reactor suitable for the depolymerization of waste plastic materials in said process.

Abstract: Apparatus and methods for removing, measuring, and/or mapping per- and polyfluoroalkyl substances (PFAS) present in porous media such as soils, sludges, and colloids by employing both direct and indirect heating methods to transfer thermal energy to the media undergoing treatment. The contaminated media is placed within a media treatment enclosure that incorporates a thermal jacket, and radiatively heated by circulating a heated gas through the thermal jacket. The contaminated media is directly heated by injecting heated treatment gas into the media treatment enclosure. The heated treatment gas is drawn over and/or through the contaminated media to mobilize contaminants from the media and into the treatment gas, which is then collected and processed to recover the contaminant.

Abstract: A reactor for coating particles includes one or more motors, a rotary vacuum chamber configured to hold particles to be coated, wherein the rotary vacuum chamber is coupled to the motors, a controller configured to cause the motors to rotate the rotary vacuum chamber about an axial axis of the rotary vacuum chamber such that the particles undergo tumbling agitation, a vacuum port to exhaust gas from the rotary vacuum chamber, a paddle assembly including a rotatable drive shaft extending through the rotary vacuum chamber and coupled to the motors and at least one paddle extending radially from the drive shaft, such that rotation of the drive shaft by the motors orbits the paddle about the drive shaft in a second direction, and a chemical delivery system including a gas outlet on the paddle configured inject process gas into the particles.

Abstract: A method for manufacturing terephthalic acid includes the following operations: providing a raw material, in which the raw material includes a first raw material including polyethylene terephthalate; performing a depolymerization reaction on the first raw material to form a depolymerization product, in which the depolymerization product includes disodium terephthalate; performing a decolorization process on the disodium terephthalate to form decolorized disodium terephthalate and precipitated sludge; separating the decolorized disodium terephthalate and the sludge; and forming terephthalic acid from the decolorized disodium terephthalate after separating the decolorized disodium terephthalate and the sludge.

Abstract: An apparatus for the destruction of a precursor material includes a steam plasma reactor having a high temperature zone and a combustion zone. The high temperature zone is adapted for hydrolyzing the precursor material, whereas the combustion zone is adapted to effect medium temperature oxidation of the reactant stream where combustion oxygen or air is injected. A quenching unit is provided at an exit end of the reactor for quenching a resulting gas stream to avoid the formation of unwanted by-products.

Abstract: A hydrolysis apparatus for organic waste using a hydraulic crushing effect includes: a housing having an open top surface and an inner lodging space; a reaction tank being lodged in the inner lodging space of the housing and having an open top surface and an inner space for accommodating a defined liquid chemical; a heating section connected to a bottom surface of the reaction tank and integrated into the reaction tank; and a driving means for moving the housing to put the housing in a linear reciprocating motion. The present invention has an effect to greatly reduce the physical crushing time and the dissolution time using a liquid chemical in the hydrolysis of animal carcass and other organic wastes, such as food waste, sewage/waste water sludge, animal/plant residue, and so forth, thereby increasing the work efficiency and reducing the cost.

Abstract: An optimized gasification/vitrification processing system having a gasification unit which converts organic materials to a hydrogen rich gas and ash in communication with a joule heated vitrification unit which converts the ash formed in the gasification unit into glass, and a plasma which converts elemental carbon and products of incomplete combustion formed in the gasification unit into a hydrogen rich gas.

Abstract: Methods of making a fuel fluid are disclosed. A first working fluid and a second working fluid may be provided. The first working fluid may be exposed to a first high voltage electric field to produce a first fluid plasma, and the second working fluid may be exposed to a second high voltage electric field to produce a second fluid plasma. The first fluid plasma and the second fluid plasma may be contacted to form a fluid plasma mixture, which is transported to a heat exchange device. The fluid plasma mixture may be cooled to form a fuel fluid; and the fuel fluid may be collected.

Abstract: Body containment constructions, materials, and methods of use for bio-cremation processes are disclosed. Preferably, the containment constructions of the present invention provide the functionality of liquid containment and also the functionality of body presentment for viewing purposes, if desired, in addition to bio-degradability. Advantageously, liquid containment is provided in a body containment construction that is sufficiently liquid impervious, allows for body transport by sufficient structural support, and is decomposable within the time period for a bio-cremation process. More preferably, the containment construction will dissolve or decompose within a normal procedural time period without leaving any component remaining from the containment construction.

Abstract: A two step process for the destruction of a precursor material using a steam plasma in a three zone reactor wherein the precursor material is hydrolyzed as a first step in the high temperature zone of the reactor, followed by a second step of medium temperature oxidation of the reactant stream in the combustion zone of the reactor where combustion oxygen or air is injected and immediate quenching of the resulting gas stream to avoid the formation of unwanted by-products. A related apparatus includes a non transferred direct current steam plasma torch, an externally cooled three zone steam plasma reactor means for introducing the precursor material into the plasma plume of the plasma torch, means for introducing the combustion air or oxygen into the combustion zone, means for exiting the reactant mixture from the reactor and means for quenching the reactant mixture located at the exit end of the reactor.

Abstract: A two step process for the destruction of a precursor material using a steam plasma in a three zone reactor wherein the precursor material is hydrolyzed as a first step in the high temperature zone of the reactor, followed by a second step of medium temperature oxidation of the reactant stream in the combustion zone of the reactor where combustion oxygen or air is injected and immediate quenching of the resulting gas stream to avoid the formation of unwanted by-products. A related apparatus includes a non transferred direct current steam plasma torch, an externally cooled three zone steam plasma reactor means for introducing the precursor material into the plasma plume of the plasma torch, means for introducing the combustion air or oxygen into the combustion zone, means for exiting the reactant mixture from the reactor and means for quenching the reactant mixture located at the exit end of the reactor.

Abstract: The invention is directed to systems and methods for the recycling of lithium ion batteries or the like. The system methods include comminution and destruction of used batteries, controlling the explosive reaction of the battery components during processing, and processing the materials into a suitable form for sampling and recycling.

Abstract: Devices for use in the disposal of pharmaceutical compositions are provided. Aspects of the devices include: a support having a surface; an activated carbon layer present on the surface; and an adhesive for stably associating a pharmaceutical composition with the activated carbon layer upon application of the pharmaceutical composition to the activated carbon layer. Also provided are methods of using the devices and kits containing the devices.

Abstract: The present invention provides a kiln for the combustion of agricultural waste. The kiln includes a central cylindrical combustion chamber. The central cylindrical combustion chamber includes a system for the control of combustion air to the combustion chamber. The kiln includes a second concentric cylinder surrounding the central cylindrical combustion chamber. The second concentric cylinder includes a system for the flow of cooling water through the first annulus between the central cylindrical combustion chamber and the second concentric cylinder. The kiln includes a system for the feeding of the agricultural waste into the central combustion chamber. The kiln includes a temperature sensing device to measure and display the temperature within the central combustion chamber during the combustion of the agricultural waste. The kiln includes a system for the recovery of ash from the kiln. In operation, the temperature of combustion is controlled to between 550° C. and 650° C.

Abstract: Techniques, systems, apparatus and material are disclosed for generating renewable energy from biomass waste while sequestering carbon. In one aspect, method performed by a reactor to dissociate raw biomass waste into a renewable source energy or a carbon byproduct or both includes receiving the raw biomass waste that includes carbon, hydrogen and oxygen to be dissociated under an anaerobic reaction. Waste heat is recovered from an external heat source to heat the received raw biomass waste. The heated raw biomass waste is dissociated to produce the renewable fuel, carbon byproduct or both. The dissociating includes compacting the heated raw biomass waste, generating heat from an internal heat source, and applying the generated heat to the compacted biomass waste under pressure.

Abstract: Apparatus and a method for decomposing a body of a deceased person, as an alternative to traditional cremation. The apparatus includes a primary vessel where the body is treated with a highly basic solvent to render the body into skeletal remains and liquid remains. A clamp is applied to the skull during processing for solvent access to the skull. A secondary vessel is used to receive the liquid remains from the primary vessel and further treat them. During this further treatment, the skeletal remains left in the primary vessel after the liquefied portion has been transferred to the secondary vessel, can be treated to be decolorized and deodorized, and then returned to the decedent's next of kin as ash-like material.

Abstract: The invention provides a method and apparatus for incinerating waste, wherein the waste is one or more of an organic waste and an inorganic waste. The apparatus includes a grinder for grinding a mixture of the waste and calcium carbonate. The ground mixture is then fed to a molten metal bath contained within a crucible. Thereafter, a heating member configured proximal to the crucible combusts the mixture of the waste and the calcium carbonate to form one or more of slag and one or more acidic gases. On combustion, the one or more acidic gases are neutralized by calcium hydroxide produced as a result of combusting the calcium carbonate. Additional metal compounds usable as fertilizers are also produced in response to reacting with the one or more acidic gases.

Abstract: Described herein are processes and related devices and systems for the conversion of higher hydrocarbons, such as in the form of waste plastics, petroleum sludge, slope oil, vegetable oil, and so forth, into lower hydrocarbons, which can be used as fuels or raw materials for a variety of industrial and domestic uses.

Abstract: A two step process for the destruction of a precursor material using a steam plasma in a three zone reactor wherein the precursor material is hydrolyzed as a first step in the high temperature zone of the reactor, followed by a second step of medium temperature oxidation of the reactant stream in the combustion zone of the reactor where combustion oxygen or air is injected and immediate quenching of the resulting gas stream to avoid the formation of unwanted by-products. A related apparatus includes a non transferred direct current steam plasma torch, an externally cooled three zone steam plasma reactor means for introducing the precursor material into the plasma plume of the plasma torch, means for introducing the combustion air or oxygen into the combustion zone, means for exiting the reactant mixture from the reactor and means for quenching the reactant mixture located at the exit end of the reactor.

Abstract: A reactor (110) serves to combust residual carbon in fine particulate matter, remove a contaminant from fine particulate matter, or change the composition of fine particulate matter. The reactor output is processed by particle collection devices (115, 125, 140, 155, 175) and heat exchangers (135, 150, 165) to provide particle outputs (118, 124, 131, 144, 159) of different sizes. A contaminant, such as carbon or a metal, is combusted, vaporized, volatized, broken down, or substantially appears on one particle output (144) so that another particle output and the exhaust gas (142) are substantially contaminant-free. Different outputs can also be selectively mixed, as desired, to product a combined output (171). Fly ash and silica fume can be processed separately or together to reduce the amount of unburned carbon in both. Metals can also be removed from the fine particulate matter. Kaolin can also be processed to produce metakaolin.

Abstract: Devices for use in the disposal of pharmaceutical compositions are provided. Aspects of the devices include: a support having a surface; an activated carbon layer present on the surface; and an adhesive for stably associating a pharmaceutical composition with the activated carbon layer upon application of the pharmaceutical composition to the activated carbon layer. Also provided are methods of using the devices and kits containing the devices.

Abstract: The present invention relates to a method and apparatus for converting organic material into a burnable substance, typically a hydrocarbon fuel, such as ethanol.

Abstract: An apparatus for disposal of photocurable fluid waste may include a conduit for conducting photocurable fluid waste from a source of photocurable fluid waste; a dispenser for automatically dispensing a receptacle made of material that is impermeable to the photocurable fluid waste and that transmits radiation capable of curing; a welder or other sealing device for welding the receptacle to form a bag with a portion of the photocurable fluid waste inside; and a source of radiation for curing the photocurable fluid waste in the bag.

Abstract: Techniques, systems, apparatus and material are disclosed for generating renewable energy from biomass waste while sequestering carbon. In one aspect, a method performed by a reactor to dissociate raw biomass waste into a renewable source energy or a carbon byproduct or both includes receiving the raw biomass waste that includes carbon, hydrogen and oxygen to be dissociated under an anaerobic reaction. Waste heat is recovered from an external heat source to heat the received raw biomass waste. The heated raw biomass waste is dissociated to produce the renewable fuel, carbon byproduct or both. The dissociating includes compacting the heated raw biomass waste, generating heat from an internal heat source, and applying the generated heat to the compacted biomass waste under pressure.

Abstract: The present disclosure relates to a decontamination method and apparatus for cladding hull wastes of spent nuclear fuels, capable of decontaminating a small quantity of spent nuclear fuels remaining on surfaces of the cladding hull wastes and radioactive fission products penetrated into the cladding hulls through an electrochemical dissolution. The method includes inserting the cladding hull waste into an anodic basket, immersing a reference electrode and a cathodic electrode as well as the anodic basket in a molten salt, dissolving a surface of the cladding hull waste by applying a voltage or current to the anodic basket with respect to the cathodic electrode or the reference electrode, removing the anodic basket, and removing a salt remaining on the surface of the cladding hull waste.

Abstract: Tissue digestion methods and apparatuses that provide easy, safe and inexpensive disposal of biological tissue, for example animal carcasses and human cadavers, are disclosed. Embodiments include tissue digesters with elongated cylindrical vessels for holding digestive fluid and baskets for holding tissue within said vessel. Embodiments include baskets with perforations to allow circulation of digestive fluid around and about the tissue. In one form the basket holding the tissue is horizontally loaded into a horizontally disposed vessel. The vessel is then tilted to a more vertical orientation. Gravity helps to collect the tissue fragments in a sloped collection region of the basket, which is located near a mixer to allow continual agitation of the tissue fragments as they are digested. The tissue digester can operate efficiently at lower temperature and pressures, is mechanically less complicated, consumes less power and is less expensive to manufacture than conventional tissue digesting systems.

Abstract: Techniques, systems, apparatus and material are disclosed for generating renewable energy from biomass waste while sequestering carbon. In one aspect, method performed by a reactor to dissociate raw biomass waste into a renewable source energy or a carbon byproduct or both includes receiving the raw biomass waste that includes carbon, hydrogen and oxygen to be dissociated under an anaerobic reaction. Waste heat is recovered from an external heat source to heat the received raw biomass waste. The heated raw biomass waste is dissociated to produce the renewable fuel, carbon byproduct or both. The dissociating includes compacting the heated raw biomass waste, generating heat from an internal heat source, and applying the generated heat to the compacted biomass waste under pressure.

Abstract: The present invention relates to a process for the treatment of hazardous waste, the process comprising: (i) providing a hazardous waste; (ii) providing a further waste; (iii) plasma treating the hazardous waste in a first plasma treatment unit, (iv) gasifying the further waste in a gasification unit to produce an offgas and a char material; and (v) plasma treating the offgas, and optionally the char material, in a second plasma treatment unit to produce a syngas, (vi) optionally treating the syngas in a gas cleaning plant, wherein the first plasma treatment unit is arranged to plasma treat at least some of the solid by-products from the gasification unit and/or the second plasma treatment unit and/or the gas cleaning plant.

Abstract: A rotating air distributor for rotary reactors such as rotary kilns for the gasification of biomass and other carbonaceous materials for efficient mixing and maximum conversion of solid biomass and other carbonaceous materials into synthesis fuel gas is disclosed. The invention includes a gas distribution port comprises of one main supply from which several discharge nozzles emerge at different angles and at different locations along the length of the reactor to provide distribution of gas throughout the intended length of the reactor. The discharge of gas from the gas distribution port is adjusted by the variable position of a plug inside the port that can be adjusted during the operation of the kiln to achieve optimum gas-solid interaction along the length of the reactor. The rotating action of the gas distribution port also facilitates and eases the passage of reacted biomass solid and other carbonaceous material residue through the reactor.

Abstract: A nuclear chemistry laboratory adopts In-site Cutting Technique to remove the large-scale glove box contaminated by transuranium compounds. During removal operation, to prevent further spreading of contamination, it is necessary to build an alpha airtight quarantine tent around the glove box that is ready to be cut. Each section of the quarantine tent maintains a stable airflow and sufficient air exchange to meet negative pressure requirements and effectively prevent leak of ? contamination. It is necessary to install a negative pressure ventilation system to assure the operation of the quarantine tent that has a pressure gradient and allows airflow from low contamination area to high contamination area to effectively prevent spreading of ? contamination and also increase the safety for the transuranium contaminated glove box that is not in service.

Abstract: The purpose of the present invention is to provide a method for collecting effective components from polyester fiber waste containing polyalkylene telephthalate as the main component, more specifically to provide a method for separating and removing foreign matters (mainly cotton) contained in polyester fiber waste. The purpose of the invention can be achieved by a method for separating and removing foreign matters from polyester waste, which includes throwing polyester fiber waste that contains polyalkylene telephthalate as the main component and foreign matters other than the polyalkylene telephthalate into a depolymerization reaction tank, subjecting a part or all of the polyester fiber to a depolymerization reaction with alkylene glycol to give a depolymerization reaction liquid, and then continuously or intermittently feeding the liquid to a foreign matter-separating and removing apparatus having specified characteristics.

Abstract: Disclosed is an organic material disposal method comprising a step for thermally decomposing a raw organic material and a gas treatment step for treating a gas generated in the preceding step, wherein the thermal decomposition step comprises a substep of decomposing the raw organic material into a carbide and a gaseous component, and the gas treatment step comprises the following substeps (1) to (5): (1) catalytically oxidizing the gaseous component produced in the thermal decomposition step; (2) neutralizing/washing the oxidized gas; (3) subjecting a waste water produced in the neutralization/washing step to the solid-liquid separation; (4) further thermally decomposing a solid component separated in the solid-liquid separation step together with the raw organic material in the thermal decomposition step; and (5) re-using a liquid component separated in the solid-liquid separation step in the solid-liquid separation step and/or the neutralization/washing step.

Abstract: A method and device for chemical destruction of at least one feed comprising at least one organic compound are provided. The device comprises at least one inductive plasma torch, means for introducing at least one plasma-forming gas into the torch, optionally when the plasma gas(es) comprise(s) no or little oxygen, means for bringing oxygen gas into the plasma or into the vicinity of the plasma, means for introducing the feed into the torch, a reaction enclosure capable of allowing thermal destruction of the gases flowing from the torch, a device allowing mixing of the gases flowing out of the reaction enclosure to be carried out, means for introducing air and/or oxygen gas into the mixing device, a device allowing recombination by cooling of at least one portion of the gases from the mixing device, the torch, the reaction enclosure, the mixing device and the recombination device being in fluidic communication.

Abstract: The invention relates to a method for treating bulk material which contains carbon and impurities. According to the invention, bulk material is directly heated inductively inside a reactor.

Abstract: Apparatus and a method for decomposing a body of a deceased person, as an alternative to traditional cremation. The apparatus includes a primary vessel where the body is treated with a highly basic solvent to render the body into skeletal remains and liquid remains. A clamp is applied to the skull during processing for solvent access to the skull. A secondary vessel is used to receive the liquid remains from the primary vessel and further treat them. During this further treatment, the skeletal remains left in the primary vessel after the liquefied portion has been transferred to the secondary vessel, can be treated to be decolorized and deodorized, and then returned to the decedent's next of kin as ash-like material.

Abstract: The invention provides a method and apparatus for incinerating waste, wherein the waste is one or more of an organic waste and an inorganic waste. The apparatus includes a grinder for grinding a mixture of the waste and calcium carbonate. The ground mixture is then fed to a molten metal bath contained within a crucible. Thereafter, a heating member configured proximal to the crucible combusts the mixture of the waste and the calcium carbonate to form one or more of slag and one or more acidic gases. On combustion, the one or more acidic gases are neutralized by calcium hydroxide produced as a result of combusting the calcium carbonate. Additional metal compounds usable as fertilizers are also produced in response to reacting with the one or more acidic gases.

Abstract: Disclosed is a reactor for separating an aluminum layer from multi-layer film wastes to reuse a multi-layer film waste without burying or incinerating the multi-layer film waste including the aluminum. The reactor comprises a cylindrical casing which is filled with a solution to dissolve aluminum layers of the multi-layer film wastes pulverized into a predetermined size, a partition dividing an inner portion of the casing into a reactor tub in which the solution reacts with the aluminum layer and a separator tub which is provided at a portion of the reactor tub to decompose the pulverized multi-layer film wastes in which the aluminum is completely dissolved by the solution, and a stirrer which is installed at an upper portion of the reactor and stirs the solution in the reactor to activate the reaction between the solution and the aluminum in the reactor tub and to transfer the multi-layer film wastes to the separator tub.

Abstract: A conversion-to-oil apparatus capable of efficiently treating plastic, includes a melting unit for heating and melting plastic fed thereto and a decomposing unit for further heating and vaporization-decomposing the molten plastic melted by the melting unit, wherein the decomposing unit is inclined upwardly, having a lead screw mounted therein, and is provided at its upper end portion with a catalyst cylinder extending upwardly and a residue takeout unit extending downwardly, and the decomposing unit has a prevention element for preventing molten plastic gas from flowing down to the residue takeout unit.

Abstract: A thermal reactor for producing usable heat energy by destroying waste including a vessel wherein organic waste upon entering said vessel gasifies as it falls onto a carbon bed and is transformed into a synthesis gas with high heat and kinetic energy that can be harnessed to produce electricity. Inorganic waste upon entering melts as it falls onto the carbon bed and exits via slag ports to form an inert slag. Because there is no oxygen present in the gasification zone, the waste is not combusted and neither furan or dioxin are formed. The waste includes either prepared refuse derived fuel (RDF) or unprepared raw waste or a combination thereof.

Abstract: A styrene monomer reclamation process and system is disclosed. The styrene monomer reclamation process includes providing a waste plastic. The waste plastic includes styrenic polymers. The waste plastic is formed into polymer particles. At least a portion of the polymer particles are dissolved in a solvent to form a polymer stream. The dissolved polymer particles are depolymerized to form a styrene monomer stream.

Abstract: The present invention relates to a process for the treatment of waste in a reactor (3) comprising the steps of combining the waste to be processed and an aqueous, alkaline solution to form a reaction mixture, heating the reaction mixture to a temperature range between 140° C. to 250° C. and a pressure between 3 bar and 12 bar to produce at least one aqueous, organic phase, a gas phase and optionally a solid phase, removing the gas phase from the reactor (3), separating the organic and aqueous components of the gas phase, in particular by means of a rectification column and feeding the aqueous components of the gas phase back into the reactor.

Abstract: The subject of the invention is apparatus and method for thermolysis of waste plastics where reaction residue and carbonization products are removed continuously. Apparatus according to the invention characterized in that after the plastic feeding system (1) the extruder (2) and pyrolysis reactor (3) which is equipped in dual propeller (7) and is connected to external circulation loop (4) with flux heating (5), circulation pump (6) and three-way valve (8) are situated. Method according to the invention is characterized in that plastic waste are continuously fed to the reactor where at 350-450° C.

Abstract: The present invention pertains to a method and an apparatus for treating municipal solid waste, and more particularly to a method and an apparatus for treating and recycling municipal solid waste not separately collected, and also for minimizing the amount of final waste to be buried.

Abstract: An apparatus for synergistically combining a plasma with a comminution means such as a fluid kinetic energy mill (jet mill), preferably in a single reactor and/or in a single process step is provided by the present invention. Within the apparatus of the invention potential energy is converted into kinetic energy and subsequently into angular momentum by means of wave energy, for comminuting, reacting and separation of feed materials. Apparatuss of use of the apparatus in the practice of various processes are also provided by the present invention.

Abstract: The present invention relates to a method for decomposing and recovering an isocyanate compound, which comprises: continuously mixing and dispersing into water at high pressure and high temperature an isocyanate compound having at least one isocyanate group or group derived from an isocyanate group in a molten state or solution state, supplying a liquid mixture containing the isocyanate compound and the water at high pressure and high temperature continuously to a reactor, followed by subjecting the isocyanate compound to a decomposition reaction in the reactor, and recovering a raw material for the isocyanate compound or a derivative thereof; and an apparatus for decomposing and recovering an isocyanate compound, which comprises: a reactor which brings water at high pressure and high temperature into contact with an isocyanate compound having at least one isocyanate group or group derived from an isocyanate group to cause a decomposition reaction, a water supply line which continuously supplies the water at

Abstract: The instant invention relates to a process and plant for the transformation of dangerous wastes containing chromium six as contaminant into non dangerous wastes that can be stored without special care and will be degraded in the environment without time limit. The process basically consists of milling, extracting chromium six in liquid phase and under controlled conditions of stirring, time and temperature, proceeding then, through reduction, to transform the chromium six in chromium three and then precipitating as chromium trioxide, through gasification. The solid resulting from the transformation process can be used as raw material for the manufacturing of firebricks or eventually for the manufacturing of bricks used in the building industry through a process not included in the instant description.