摘要:
Systems and methods for processing hydrocarbons are provided. A hydrocarbon can be distilled to provide a distillate, a gas oil, and a residue. The residue can include, but is not limited to asphaltenes and non-asphaltenes. The residue can be mixed with a solvent to provide a mixture. The asphaltenes can be selectively separated from the mixture to provide a deasphalted oil. At least a portion of the deasphalted oil and at least a portion of the gas oil can be hydroprocessed to provide a hydroprocessed hydrocarbon. At least a portion of the distillate and at least a portion of the hydroprocessed hydrocarbon can be cracked in a first reaction zone to provide a first cracked product comprising C2 hydrocarbons, C3 hydrocarbons, C4 hydrocarbons, and naphtha.
摘要:
Hydrogen sulfide evolution from asphalt may be reduced or eliminated using an additive to act as a scavenger. Zinc oxide, when present in the form of nano-particles is an effective component is preventing or mitigating the evolution of hydrogen sulfide from asphalt. Zinc sulfonate may also be used. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).
摘要:
A process for producing pipeline-ready or refinery-ready feedstock from heavy hydrocarbons using a high-performance solvent extraction process with high local solvent-to-process fluid ratios yet maintaining low overall solvent-to-process fluid ratios, by first performing mild thermal cracking on the heavy hydrocarbons and then separating asphaltene-rich fractions from a resulting thermally affected fluid so that the high solvent-to-oil ratio portion of the process acts only on those asphaltene-rich fractions, and producing a dry, solid asphaltene as an end-product.
摘要:
A novel composition is provided that incorporates the residual solids from solvent deasphalting to make a high value asphalt product. A process for making the asphalt composition is also provided. A first portion of heavy oil or another feedstock can be deasphalted using propane deasphalting or another suitable deasphalting process. This generates a solvated fraction and an insoluble deasphalting residue. The deasphalting residue is then added to a second portion of heavy oil, such as a second portion of the same type of heavy oil that was used as feedstock in the solvent deasphalting. The mixture of deasphalting residue and heavy oil results in a novel dispersion that is suitable for use as an asphalt. Optionally, an additive such as an alkyl substituted aromatic sulfonic acid can be added to the composition to further improve the asphalt properties.
摘要:
A method of extracting bitumen from bituminous material. In some embodiments, the method may include loading a bitumen material in a column, followed by feeding a first quantity of solvent into the column. The method may also include collecting the bitumen-enriched solvent exiting the column. A quantity of the bitumen-enriched solvent may then be fed into the column. In some embodiments, the method may include simultaneously loading bitumen material and a solvent in a column, followed by feeding additional solvent into the column. The method may also include collecting bitumen-enriched solvent exiting the column, and feeding a quantity of the bitumen-enriched solvent into the column.
摘要:
A method for extracting bitumen from an oil sand feed stream comprises at least the steps of: (a) providing an oil sand feed stream; (b) contacting the oil sand feed stream with an aliphatic hydrocarbon solvent thereby obtaining a solvent-diluted oil sand slurry; (c) separating the solvent-diluted oil sand slurry, thereby obtaining a solids-depleted stream and a solids-enriched stream; and (d) removing solvent from the solids-enriched stream thereby obtaining a dry product comprising sand and bitumen, wherein the bitumen in the dry product comprises at least 40 wt. % asphaltenes.
摘要:
The invention relates to improved bitumen recovery processes and systems. The process may include providing a bitumen froth feed stream, separating the stream in a froth separation unit to produce a diluted bitumen stream, treating the diluted bitumen stream in an electrostatic desalter to produce a treated bitumen stream, and separating the treated bitumen stream into a solvent recycle stream and a bitumen product stream. The system may include a combined AC/DC desalter with a control unit for optimizing the treatment process to produce a product bitumen stream using less solvent and smaller separators than conventional bitumen froth treatment plants and processes.
摘要:
The invention relates to a method for the dehydration of, and in-line removal of asphaltenes from, heavy and extra-heavy crudes. The method is performed at the well head at pressures of between 414 and 689 KPa and temperatures of between 60 and 100° C. and includes two phases, namely a dehydration phase and a deasphalting phase. The first phase includes the addition of solvent, removal of free water, heating, addition of emulsion breakers and settling for removal of emulsified water. The asphaltenes are extracted in the second phase. Said phase comprises the use of low-force in-line static mixers and contactors having a specific design and a sedimentation device with specific internal arrangements for separation. The recovered solvent is recirculated into the method, the improved crude is separated and the asphaltenes are used as fuel for cogeneration which supplies the energy requirements for production and the improvement method.
摘要:
A process for upgrading crude oil fractions or other hydrocarbon oil feedstreams boiling in the range of 36° to 520° C., and preferably naphtha and gas oil fractions boiling in the range of 36° to 400° C., employs a solid adsorption material to lower sulfur and nitrogen content by contacting the hydrocarbon oil, and optionally a viscosity-reducing solvent, with one or more solid adsorbents such as silica gel or silica, silica alumina, alumina, attapulgus clay and activated carbon in a mixing vessel for a predetermined period of time; passing the resulting slurry to a membrane separation zone, optionally preceded by a primary filtration step (i.e., single stage or multiple stages), to separate the solid adsorption material with the adsorbed sulfur and nitrogen compounds from the treated oil; recovering the upgraded hydrocarbon product having a significantly reduced nitrogen and sulfur content as the membrane permeate; mixing the solid adsorbent material with one or a combination of aromatic solvents such as toluene, benzene, the xylenes and tetrahydrofuran to remove and stabilize the sulfur and nitrogen compounds; transferring the solvent to a fractionation tower to recover the solvent, which can be recycled for use in the process; and recovering the hydrocarbons that are rich in sulfur and nitrogen for processing in a relatively small high-pressure hydrotreating unit or transferring them to a fuel oil pool for blending.
摘要:
Embodiments of a method are described for modifying pitches, oils, tars, and binders by using these materials as solvents to extract organic chemicals from coal.