摘要:
Methods for converting plastic to wax are provided. In one embodiment, a method for converting a waste plastic to wax includes introducing the waste plastic into a chamber and adding hydrogen to the chamber. The method includes heating the waste plastic and hydrogen sufficiently to thermally depolymerize the waste plastic to form a wax product comprising paraffin and olefin compounds.
摘要:
A method for manufacturing a composition including telechelic oligomers the ends of which carry reactive functions, the method including the contacting of at least one waste material containing rubber, preferable tire waste, with a chemical degradation agent selected from cleavage agents that are specific for double bonds; and a transfer agent in the presence of a catalysts; at a temperature from 15 to 400° C., preferably from 17 to 35° C.; at ambient pressure. The composition of oligomers that can be prepared by the method is also described.
摘要:
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.
摘要:
The invention relates to a method for thermochemically converting organic waste material having high molecular weight into liquid combustible materials and fuels, comprising the following steps: feeding organic waste material into a reactor, heating the organic waste material to a temperature between 250° C. and 500° C. while avoiding exceeding critical coking temperatures in the reactor, feeding biogenic substances to the reactor, collecting and condensing the gases and vapors released from the mixture of organic waste material and biogenic substances, collecting the condensate and letting phases form, and removing the phase(s) containing liquid combustible materials and fuels.
摘要:
The present invention proposes a method for feeding a burden to a blast furnace (32), wherein the method comprises providing a charging device (38) having at least one material hopper (40), the material hopper (40) comprising a hopper chamber (42), a material inlet aperture for feeding a burden into the hopper chamber (40), and a material discharge aperture for feeding a burden from the hopper chamber (40) to the blast furnace (32); the material inlet aperture having an associated inlet seal valve 44) for opening and closing the material inlet aperture and the material discharge aperture having an associated material discharge valve (46) for opening and closing the material discharge aperture. The method further comprises opening the material inlet aperture and closing the material discharge aperture; feeding a burden into the hopper chamber (40) through the material inlet aperture; closing the inlet seal valve (44); pressurizing the hopper chamber (40) by feeding pressurizing gas into the hopper chamber (40); and opening the material discharge valve (46) and feeding the burden from the hopper chamber (40) to the blast furnace (32). According to an important aspect of the invention, the method further comprises subjecting at least a portion of a top gas recovered from the blast furnace (32) to a recycling process wherein carbon dioxide is removed from the recovered top gas; and feeding at least a portion of the recovered carbon dioxide as pressurizing gas into the hopper chamber (40) for pressurizing the hopper chamber (40).
摘要:
A method for producing a vapor stream from waste plastic comprises providing a waste plastic feedstock into a reactor containing one or more residues produced from a previously heated source of waste plastic, and heating the waste plastic feedstock in the reactor to a temperature from about 125° C. to 500° C. to generate a vapor containing one or more hydrocarbons. The waste plastic feedstock can have a calcium to sodium mass ratio from about 0.0001 to 400 as measured by inductively-coupled plasma (ICP) spectrometry. The catalytic activity in the reactor may be provided through one or more constituent elements in the waste plastic feedstock or the one or more residues produced from the previously heated source of waste plastic.
摘要:
The present invention relates to the development of a microwave pyrolysis process for plastic materials selected from PE, PP, PS, PET, PVC and mixtures thereof in the presence of end-of-life tyres, or the pyrolysis residues thereof, or other carbon materials for the production of high added value pyrolysis oils containing over 50% by weight hydrocarbons distillable between 20 and 250° C. and a sulphur content less than 1% by weight.
摘要:
Microwave based systems and methods are provided for obtaining carbonaceous compounds from polypropylene-containing products. In one example, embodiment, a method is provided for recovering at least one organic decomposition product from a polypropylene-containing product, the method comprising: placing the polypropylene-containing product in a reduction zone of a material recovery system; flowing an inert gas through the reduction zone from a reduction inlet to a reduction outlet to purge the reduction zone and maintain a positive pressure therein; applying electromagnetic wave energy from an electromagnetic wave generator to the reduction zone via a bifurcated waveguide assembly, while maintaining the polypropylene-containing product in a stationary position for at least a portion of the applying, to yield at least one gaseous organic decomposition product; and exhausting the at least one gaseous organic decomposition product from the reduction zone along with the inert gas through the reduction outlet.
摘要:
This invention relates to compositions comprising fluid hydrocarbon products, and to methods for making fluid hydrocarbon products via catalytic pyrolysis. Some embodiments relate to methods for the production of specific aromatic products (e.g., benzene, toluene, naphthalene, xylene, etc.) via catalytic pyrolysis. Some such methods involve the use of a composition comprising a mixture of a solid hydrocarbonaceous material and a heterogeneous pyrolytic catalyst component. The methods described herein may also involve the use of specialized catalysts. For example, in some cases, zeolite catalysts may be used.
摘要:
The present invention relates to a method for the recycling of plastics materials, in particular waste plastics materials, into chemical feed stocks and hydrocarbon fractions. The present invention also relates to novel zeolite based catalysts used in such methods. The present invention also relates to methods of manufacturing such zeolite based catalysts. Plastics waste is traditionally disposed of by land-fill, incineration or recycling by re-processing the waste into raw material for reuse. Each of these disposal methods has its disadvantages. The drawbacks of land-fill are self apparent. Although incineration may include energy recovery, there still remains the obvious problem of CO2 emission and the emission of other toxic pollutants. Additionally, recycling the plastics requires sorting of the plastics waste because certain types of plastics materials are not recyclable, and mixtures of plastics can be problematic. The present invention provides an improved method for the recycling of waste plastics including mixed waste streams.