Abstract:
A process for removing polar components from a process stream in a refinery process without cooling the process stream. The process stream is fed to a first adsorber unit to remove contaminants containing sulfur at substantially the same elevated temperature by exposing the process stream to a metal oxide and/or a mixed metal oxide to remove the sulfur containing contaminants and produce a metal sulfide and a desulfurized process stream. The metal sulfide may be regenerated by exposing it to a stream of oxygen and the desulfurized process stream exposed to the regenerated metal/mixed metal oxide to remove moisture from the stream. The stream is then processed within a second adsorber unit to remove nitrogen containing contaminants at substantially the same elevated temperature by exposing the stream to a molecular sieve and/or zeolite.
Abstract:
Method for deep desulphurization of hydrocarbon fuels includes following steps: (1) treatment of a hydrocarbon fuel under the condition of its mixing with gaseous oxidant selected from the group consisting nitrogen monoxide, dry air, ozone and a mixture of at least two of said reagents in order to oxidize sulfur-containing compounds presented in said fuel, and with a fine-dispersed adsorbent based on montmorillonite in order to adsorb oxidized sulfur-containing compounds, and (2) separation of spent adsorbent together with adsorbed oxidized sulfur-containing compounds from refined fuel.
Abstract:
Systems and methods for removing impurities from a feed fluid in a single vessel. A method generally includes, in single vessel, contacting a feed fluid passing through the vessel with a copper-based material for removing oxygen from the feed fluid; and contacting the feed fluid passing through the vessel with an adsorbent for removing at least one of water, carbon dioxide, and oxygenated hydrocarbons from the feed fluid.
Abstract:
A method for producing a substantially desulfurized hydrocarbon fuel stream at temperatures less than 100° C. including providing a nondesulfurized fuel cell hydrocarbon fuel stream and passing the fuel stream through a sulfur adsorbent system containing a specialized sulfur adsorbent containing hydrated alumina to produce a substantially desulfurized hydrocarbon fuel stream.
Abstract:
A process and system for removing polar components from a process stream in a refinery process without cooling the process stream are disclosed. The process stream is fed to a first adsorber unit to remove contaminants containing sulfur from the process stream. The process stream is processed within the first adsorber unit to remove sulfur containing contaminants. The process stream is processed with the first adsorber unit at substantially the same elevated temperature. The process stream is processed within the first adsorber unit by exposing the process stream to at least one of a metal oxide and a mixed metal oxide to remove the sulfur containing contaminants from the process stream and produce a metal sulfide and a desulfurized process stream. The metal sulfide may be exposed to a stream of oxygen to regenerate the at least one of a metal oxide and a mixed metal oxide. The desulfurized process stream may be exposed to at least one of the regenerated metal oxide and regenerated mixed metal oxide to remove moisture from the desulfurized process stream. The desulfurized process stream is then fed through a second adsorber unit to remove contaminants containing nitrogen from the process stream. The process stream is processed within the second adsorber unit to remove nitrogen containing contaminants, where the process stream being processed at substantially the same elevated temperature. The process stream is processed within the second adsorber unit by exposing the process stream to at least one of a molecular sieve and zeolites to remove nitrogen containing contaminants from the process stream.
Abstract:
A crude oil feedstream is treated to remove or reduce the content of known undesired heteroatomic and polynuclear aromatic compounds containing nitrogen and sulfur by contacting the feedstream with one or more solid adsorbent materials selected from attapulgus clay, alumina, silica gel and activated carbon in a mixing vessel for a time that is sufficient to optimize the adsorption of the undesired compounds from the crude oil, subjecting the mixture to atmospheric flash distillation and then to vacuum flash distillation to recover presorbed boiling ranges of products having a lowered content of the undesired compounds, and preferably regenerating at least a portion of the solid adsorbent material for reuse in the process.
Abstract:
A process for desulphurizing a gasoline cut containing olefins, sulphur-containing compounds and optionally molecules belonging to C3 and C4 cuts comprises at least a first step A for contacting said gasoline cut with an acidic resin having an acid capacity of more than 4.7 equivalents per kg and a specific surface area of less than 55 m2/g, and a second step B for fractionation of the mixture from the first step.
Abstract:
This invention provides a resid cracking apparatus comprising a riser, reactor, stripper cum separator with adjustable outlets in flow communication with adsorbent and catalyst regenerators for converting hydrocarbon residues containing higher concentration of conradson carbon content, poisonous metals such as nickel & vanadium and basic nitrogen etc., into lighter and valuable products and a process thereof.
Abstract:
A solvent deasphalting of crude oil or petroleum heavy fractions and residues is carried out in the presence of a solid adsorbent, such as clay, silica, alumina and activated carbon, which adsorbs the contaminants and permits the solvent and oil fraction to be removed as a separate stream from which the solvent is recovered for recycling; the adsorbent with contaminants and the asphalt bottoms is mixed with aromatic and/or polar solvents to desorb the contaminants and washed as necessary, e.g., with benzene, toluene, xylenes and tetrahydrofuran, to clean adsorbant which is recovered and recycled; the solvent-asphalt mixture is sent to a fractionator for recovery and recycling of the aromatic or polar solvent. The bottoms from the fractionator include the concentrated PNA and contaminants and are further processes as appropriate.