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| Number | Title | Issue Date |
| 7244873 | Process and apparatus for separating oxygenate modifier from oligomerization effluent by water wash It has now been disclosed that by directing the effluent from an oligomerization reactor to a water wash column to remove alcohol modifier from the hydrocarbon stream before sending it to a fractionation column offers flexibility in providing a bottoms product of a ... | 07/17/2007 |
| 7223603 | Continuous on-line process control of residua distillation Ultrasonic spectroscopy, calorimetry, or thermogravimetric analysis provide measures which correlate with properties of asphaltene complex of petroleum residua which can be used to establish or maintain consistent properties of petroleum residua during blending or t... | 05/29/2007 |
| 7175716 | Critical and supercritical cleaning of hydrocarbon-containing materials A method for cleaning materials containing solids and/or liquids is disclosed which involves contacting the materials with an extracting fluid including Xe, NH3, lower aromatics, nitrous oxide, water, CO, CO2, H2O, lower alcohols, lo... | 02/13/2007 |
| 7078580 | Process for separating aromatics by extractive distillation and a composite solvent used therein This application relates to a composite solvent for separating aromatics by extractive distillation, comprising a main solvent, a solutizer and a modifier. Said solutizer is selected from any one or mixtures of any two of C8–C11 aromatics hav... | 07/18/2006 |
| 6887370 | Separation of oxygenates from a hydrocarbon stream This invention relates to a method for separating olefins and paraffins from oxygenates in a liquid hydrocarbon stream containing a high proportion of olefins, paraffins and oxygenates (mainly alcohols). Typically, the hydrocarbon stream is obtained from a Fischer-T... | 05/03/2005 |
| 6875341 | Process for enhancing the value of hydrocabonaceous natural recources A process for upgrading hydrocarbonaceous oil containing heteroatom-containing compounds where the hydrocarbonaceous oil is contacted with a solvent system that is a mixture of a major portion of a polar solvent having a dipole moment greater than about 1 debye and ... | 04/05/2005 |
| 6866772 | Extraction of aromatics from hydrocarbon oil using furfural-co-solvent extraction process An improved furfural extraction process for lube oil base-stock production from hydrocarbon oils containing aromatic type material by the addition of a solvent comprising of furfural and a co-solvent, said process being conducted in a continuous countercurrent extra... | 03/15/2005 |
| 6790344 | Liquid-phase adsorption process for removing and concentrating heteroatom compounds in hydrocarbons Disclosed is a liquid phase adsorption process for removing and concentrating heteroatom compounds in hydrocarbons (HCH), comprising the steps of adsorption, copurging and regeneration. In the adsorption step, a liquid hydrocarbon stream is fed to an adsorber, which... | 09/14/2004 |
| 6616831 | Aromatics separation process and method of retrofitting existing equipment for same An improved process for the recovery of aromatic compounds from a mixture containing aromatic and non-aromatic compounds and method for retrofitting existing equipment for the same is provided. The improved process comprises the steps of recovering aromat... | 09/09/2003 |
| 6358402 | Extractive distillation process for the reduction of sulfur species in hydrocarbons streams A method for separating sulfur species from hydrocarbon streams, particularly cracked naphtha streams, using extractive distillation. The method effectively separates sulfur species from cracked naphtha streams without substantially lowering the olefin co... | 03/19/2002 |
| 6146520 | Selective re-extraction of lube extracts to reduce mutagenicity index A process for reducing the Mutagenicity Index and/or the PCA content of a lubricating oil extract by re-extracting a lubricating oil extract with a second extraction solvent, different from the first extraction solvent, to form a secondary raffinate and a... | 11/14/2000 |
| 5922193 | Addition of ethers or aldehydes to furfural for aromatic extractions A process to improve the performance of furfural for aromatics extraction from gas oils and lube distillates by the addition of ethers and/or aldehydes, preferably having a dielectric constant less than about 40 @ 25° C.... | 07/13/1999 |
| 5527448 | Process for obtaining a fuel through extraction and hydrotreatment of a hydrocarbon charge, and the gas oil obtained A process for obtaining a fuel for internal combustion engines from a hydrocarbon charge, comprising a step (a) for distillation (D1) in which a bottom product (Q1) is obtained via a line 3 and in which a top product (T1) is obtained via a line 2, a step ... | 06/18/1996 |
| 5310480 | Processes for the separation of aromatic hydrocarbons from a hydrocarbon mixture Processes are disclosed for the separation of aromatic hydrocarbons from feedstreams containing mixtures of aromatic and non-aromatic hydrocarbons using extractive distillation with an aromatic selective solvent in order to separate the aromatic hydrocarb... | 05/10/1994 |
| 5242579 | Control method for solvent refining lubricating oils In a solvent refining process a naphthenic lubricating oil feedstock is solvent extracted to yield a primary aromatics-lean raffinate and a primary aromatics-rich extract. Polynuclear aromatic content of primary raffinate is controlled by manipulating ext... | 09/07/1993 |
| 5186817 | Process for separating extractable organic material from compositions comprising oil-in-water emulsions comprising said extractable organic material and solids This invention provides for a process for separating extractable organic material from a feed composition comprising an oil-in-water emulsion comprising a continuous aqueous phase, a discontinuous organic liquid phase comprising said extractable organic m... | 02/16/1993 |
| 5171426 | Control method for solvent refining lubricating oils In a solvent refining process a lubricating oil stock is solvent extracted to yield a primary aromatics-lean raffinate and a primary aromatics-rich extract. Aromatics content of primary raffinate is controlled by manipulating extraction temperature and so... | 12/15/1992 |
| 5139651 | Aromatic extraction process using mixed polyalkylene glycol/glycol ether solvents Processes are provided for the recovery of aromatic hydrocarbons from feeds comprising mixtures of aromatic and non-aromatic hydrocarbons using a mixed aromatic extraction solvent at extraction temperature of less than 250° F. The mixed extraction solven... | 08/18/1992 |
| 5114567 | Method for determining the properties and amount of fluid in a sample Methods are provided for determining the amount of fluids in a porous sample and determining petrophysical properties of those fluids. The methods employ a two component azeotropic solvent capable of dissolving both hydrocarbon and aqueous fluids in a por... | 05/19/1992 |
| 5092983 | Process for separating extractable organic material from compositions comprising said extractable organic material intermixed with solids and water using a solvent mixture This invention provides for a process for separating extractable organic material from a feed composition comprising said extractable organic material intermixed with solids and water, the process comprising: (A) contacting said feed composition with a solvent... | 03/03/1992 |
| 5022981 | Aromatic extraction process using mixed polyalkylene glycol/glycol ether solvents Processes are provided for the recovery of aromatic hydrocarbons from feeds comprising mixtures of aromatic and non-aromatic hydrocarbons using a mixed aromatic extraction solvent at extraction temperature of less than 250° F. The mixed extraction solven... | 06/11/1991 |
| 4985139 | Two-step heterocyclic nitrogen extraction from petroleum oils with reduced refinery equipment A process is disclosed for the removal of basic heterocyclic nitrogen compounds from a petroleum crude oil or fraction thereof which comprises treating, the petroleum crude oil in a distillation zone to form a distillation bottoms stream which is rich in ... | 01/15/1991 |
| 4909927 | Extraction of hydrocarbon oils using a combination polar extraction solvent-aliphatic-aromatic or polar extraction solvent-polar substituted naphthenes extraction solvent mixture Hydrocarbon oils, particularly petroleum oils, more particularly lube, transformer, white oil and other specialty oils can be extracted to remove aromatic hydrocarbon components therefrom using a combination polar extraction solvent, such as n-methyl pyrr... | 03/20/1990 |
| 4904369 | Residual oil conversion process A process for the production of hydrogen-enriched hydrocarbonaceous products which process comprises: (a) converting a heavy, asphaltene-containing hydrocarbonaceous residual oil, wherein at least 80% of the residual oil boils above 650° F. (343° C.), i... | 02/27/1990 |
| 4761222 | Method for separating normally liquid organic compounds A mixture of normally liquid organic compounds, particularly a light cycle oil obtained by the catalytic cracking of petroleum oils, is separated by contacting the mixture with an essentially anhydrous organic sulfoxide, particularly dimethylsulfoxide, to... | 08/02/1988 |
| 4755278 | Process for fractionating solid asphalts This process for fractionating solid asphalts is operable under low temperature and pressure conditions. The process consists of treating a suspension of asphalt powder in a surfactant-containing aqueous phase by means of a hydrocarbon solvent immiscible ... | 07/05/1988 |
| 4746420 | Process for upgrading diesel oils A process for upgrading diesel oil comprising the steps of: (1) reacting the diesel oil with a nitrogenous treating agent; (2) contacting the diesel oil from step (1) above with (a) a primary solvent selected from the group consisting of organic solvents having a d... | 05/24/1988 |
| 4569755 | Extraction of aromatics with N-cyclohexyl-2-pyrrolidone This invention relates to a low energy process for the solvent extraction of aromatic hydrocarbons from hydrocarbon streams containing the same, using as the solvent N-cyclohexyl-2-pyrrolidone together with small amounts of water. This solvent may be reco... | 02/11/1986 |
| 4498980 | Separation of aromatic and nonaromatic components in mixed hydrocarbon feeds The separation of aromatic and nonaromatic containing hydrocarbon feeds is provided by use of an extraction-separation process using mixed extraction solvents. The term "mixed extraction solvent" as used herein shall mean a solvent mixture comprising a "s... | 02/12/1985 |
| 4493765 | Selective separation of heavy oil using a mixture of polar and nonpolar solvents A hydrocarbon feedstock may be selectively separated into its various fractions by contact with a mixture of specified polar and nonpolar solvents at a temperature so as to form a two-phase system, separating the first extract and raffinate phases so obta... | 01/15/1985 |
| 4397736 | Hydrotreating supercritical solvent extracts in the presence of alkane extractants A process of recovering the hydrocarbon values from low organic carbon content deposits comprises the hydrotreating of hydrocarbons from those deposits in the presence of supercritical alkane-containing solv... | 08/09/1983 |
| 4396492 | Method for retarding corrosion in petroleum processing operation using N-methyl pyrrolidone This invention is directed to a method of reducing the amount of corrosion resulting in a petroleum process operation wherein N-methyl pyrrolidone is utilized as one of the components by adding an effective corrosion inhibiting amount of an ester additive... | 08/02/1983 |
| 4381234 | Solvent extraction production of lube oil fractions An improved solvent extraction process is described for the preparation of lube oil products, the improvement whereby the solvent contains an additive which facilitates phase separation and increases the yield of raffinate.... | 04/26/1983 |
| 4379047 | Additive for glycol solvent used in aromatic extraction Hydrazine is added to glycol solvents utilized for aromatic extraction so that corrosion is minimized while the extractive efficiency of the solvent is maintained.... | 04/05/1983 |
| 4273645 | Solvent extraction production of lube oil fractions An improved solvent extraction process is described for the preparation of lube oil products, the improvement whereby the solvent contains an additive which facilitates phase separation and increases the yield of raffinate.... | 06/16/1981 |
| 4267034 | Separating olefins from paraffins with dimethyl sulfoxide extractant A method for separating olefins from paraffins in which a mixture of olefin and paraffin is contacted with a dimethyl sulfoxide (DMSO) extractant stream in the liquid phase thereby dissolving olefins in the DMSO and permitting separation of a paraffin str... | 05/12/1981 |
| 4240901 | Process for refining hydrocarbon oils An improved solvent refining process for hydrocarbon oils such as asphalt-free lube fractions and diesel fuels is provided by recycling an inert gas such as nitrogen through the contact zone of the extraction tower.... | 12/23/1980 |
| 4125458 | Simultaneous deasphalting-extraction process An asphalt containing mineral oil is simultaneously deasphalted and extracted in a combination zone by contacting the oil with a solvent comprising N-methyl-2-pyrrolidone (NMP) containing from 0-5 LV% water and a light hydrocarbon to produce a raffinate a... | 11/14/1978 |
| 4108681 | Method for dissolving asphaltic material Asphaltic material is dissolved by contact with a solvent composition for a time sufficient to dissolve the asphaltic material wherein the solvent composition is comprised of a liquid heavy aromatic solvent having a high flash point and a fused heterocycl... | 08/22/1978 |
| 4045332 | Solvent extraction The degradation of furfural, used in the solvent extraction of aromatics, is inhibited by the use of a furfural-soluble, recoverable amine having a pKa greater than that of aniline. The preferred amine is N,N-diethyl aniline and the amount used... | 08/30/1977 |
