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| Number | Title | Issue Date |
| 7205448 | Process for the removal of nitrogen compounds from a fluid stream At lower temperatures an acidic molecular sieve adsorbent preferentially adsorbs water and basic organic nitrogen compounds over weakly basic organic nitrogen compounds such as nitrites. Elevated temperatures improve the capacity of acidic molecular sieve adsorbents... | 04/17/2007 |
| 7048846 | Membrane separation for sulfur reduction A membrane process for the removal of sulfur species from a naphtha feed, in particular, a FCC light cat naphtha, without a substantial loss of olefin yield is disclosed. The process involves contacting a naphtha feed stream with a membrane having sufficient flux an... | 05/23/2006 |
| 7041212 | Membrane separation for sulfur reduction A membrane process for the removal of sulfur species from a naphtha feed, in particular, a FCC light cat naphtha, without a substantial loss of olefin yield is disclosed. The process involves contacting a naphtha feed stream with a membrane having sufficient flux an... | 05/09/2006 |
| 7018527 | Membrane separation for sulfur reduction A membrane process for the removal of sulfur species from a naphtha feed, in particular, a FCC light cat naphtha, without a substantial loss of olefin yield is disclosed. The process involves contacting a naphtha feed stream with a membrane having sufficient flux an... | 03/28/2006 |
| 6986840 | Methods for removing organolead compounds from non-aqueous compositions Methods for removing organolead compounds from aqueous and non-aqueous organolead compositions. The methods of the present invention include: providing aqueous or non-aqueous compositions including organolead compounds; ozonating the organolead compositions with ozo... | 01/17/2006 |
| 6781023 | Decreasing Br-reactive contaminants in aromatic streams Bromine reactive hydrocarbon contaminants are removed from aromatic streams by first providing an aromatic feedstream having a negligible diene level. The feedstream is contacted with an acid active catalyst composition under conditions sufficient to remove mono-ole... | 08/24/2004 |
| 6749742 | Sulfer-reduction treatment in catalytically processed gasoline and intermediate distillates of crude oil by means of a silica gel A chemical treatment is disclosed for reducing the sulfur content of catalytically processed gasoline and intermediate crude-oil products, by absorbing the sulfur contained in such catalytically processed products on silica gel packed in a filter or assembly of filt... | 06/15/2004 |
| 6537443 | Process for removing mercury from liquid hydrocarbons Mercury is removed from crude oils, natural gas condensates and other liquid hydrocarbons by first removing colloidal mercury and solids that contain adsorbed mercury and then treating the hydrocarbons with an organic or inorganic compound containing at l... | 03/25/2003 |
| 6468418 | Sorbent treating of lubricating oils to remove haze precursors A base oil feed having a tendency to form a haze at ambient or sub-ambient temperatures is contacted with a solid adsorbent to remove at least a portion of the haze precursors, thereby reducing the haze-forming tendency of the base oil feed.... | 10/22/2002 |
| 6468417 | Filtering lubricating oils to remove haze precursors A dewaxed oil having a tendency to form a haze at ambient or sub-ambient temperatures is contacted with a solid adsorbent to remove at least a portion of the haze precursors, thereby reducing the haze-forming tendency of the dewaxed oil.... | 10/22/2002 |
| 6454934 | Petroleum processing method A petroleum processing method comprising the steps of: performing an atmospheric distillation of crude oil; collectively hydrodesulfurizing the resultant distillates consisting of gas oil and fractions whose boiling point is lower than that of gas oil in ... | 09/24/2002 |
| 6350372 | Mercury removal in petroleum crude using H2S/C The present invention relates to the removal of mercury and other heavy metals from a hydrocarbon feedstream. The process involves contacting the hydrocarbon feedstream with a feedstream-soluble sulfur compound and then contacting the hydrocarbon feedstre... | 02/26/2002 |
| 6278033 | Catalyst and process for purifying streams of materials A catalyst which contains, in its active composition, from 0.05 to 1.0% by weight of at least one metal or compound of a metal of the 10th group of the Periodic Table of the Elements and from 0.05 to 1.0% by weight of at least one metal or compound of a m... | 08/21/2001 |
| 6221241 | Process for removal of sulphur together with other contaminants from fluids A process for the purification of a fluid stream containing a sulphur contaminant, such as hydrogen sulphide, and mercury, phosphine, stibine, and/or arsenic compounds as a second contaminant wherein said fluid stream is passed through a bed of a particul... | 04/24/2001 |
| 6080302 | Method for making a process oil by using aromatic enrichment with extraction followed by single stage hydrofinishing (LAW764) A method for producing a process oil is provided in which an aromatic extract oil is added to a paraffinic rich feed to provide a blended feed. The blended feed is then extracted with an aromatic extraction solvent to yield a raffinate which subsequently ... | 06/27/2000 |
| 6007706 | Removal of sulphur together with other contaminants from fluids A process for the purification of a fluid stream containing a sulphur contaminant, such as hydrogen sulphide, and mercury, phosphine, stibine, and/or arsenic compounds as a second contaminant wherein said fluid stream is passed through a bed of a particul... | 12/28/1999 |
| 5997732 | Clay treatment process for white mineral oil Severely contaminated white mineral oils which fail the RCS specification are treated using an acid-treated bentonite clay, such as TONSIL CO 630G. The white oil products produced in the treatment may be a USP grade white oil.... | 12/07/1999 |
| 5919354 | Removal of sulfur from a hydrocarbon stream by low severity adsorption A process is provided for reducing the sulfur content of a hydrocarbon stream, wherein a hydrocarbon stream containing sulfur constituents is contacted with a sorbent under temperature and pressure conditions of low severity. The sorbent includes a metal-... | 07/06/1999 |
| 5846405 | Process oils and manufacturing process for such using aromatic enrichment and two pass hydrofinishing A method for producing a process oil is provided in which an aromatic extract oil is added to a napthenic rich feed. The combined feed is then hydrotreated in a first hydrotreating stage to convert at least a portion of sulfur and nitrogen in the feed to ... | 12/08/1998 |
| 5840175 | Process oils and manufacturing process for such using aromatic enrichment with extraction followed by single stage hydrofinishing A method for producing a process oil is provided in which an aromatic extract oil is added to a naphthenic rich feed to provide a blended feed. The blended feed is then extracted with an aromatic extract solvent to yield a raffinate which subsequently is ... | 11/24/1998 |
| 5454933 | Deep desulfurization of distillate fuels A process for providing distillate products which are substantially sulfur free, which process comprises subjecting a distillate stream to conventional hydrodesulfurization conditions including a catalyst comprised of a Group VI metal and at least one Gro... | 10/03/1995 |
| 5401392 | Process for eliminating mercury and possibly arsenic in hydrocarbons For removing mercury and any arsenic in hydrocarbon charges containing mercury and sulfur, the charge is contacted with an arsenic collecting material having catalytic properties ("catalyst") in hydrogen, the material containing at least one metal selecte... | 03/28/1995 |
| 5384040 | Process for the elimination of mercury and possibly arsenic from hydrocarbons A process for the elimination of mercury and possibly of arsenic from hydrocarbons wherein compounds containing mercury are transformed into elemental mercury, the charge is fractioned, and then the fractions rich in mercury are purified through contact w... | 01/24/1995 |
| 5271835 | Process for removal of trace polar contaminants from light olefin streams A process is disclosed for improving catalyst performance and yields in the manufacture of motor gasoline components. More particularly the process is directed to the removal of H2 S, sulfur compounds, trace amounts of acetonitrile or acetone o... | 12/21/1993 |
| 5169516 | Removal of arsenic compounds from light hydrocarbon streams A process for removal of arsenic from a hydrocarbon stream containing arsenic together with mercaptan and non-mercaptan sulfur compounds. The hydrocarbon stream is passed through at least two mercaptan oxidizing reactors in series wherein the mercaptans a... | 12/08/1992 |
| 5167797 | Removal of sulfur contaminants from hydrocarbons using N-halogeno compounds The present invention is directed to a process for removal of sulfur contaminants from hydrocarbons using processes which rely upon the reaction of organosulfur compounds with N-halogeno compounds. The sulfur removal may be effected by using liquid/liquid... | 12/01/1992 |
| 5106484 | Purifying feed for reforming over zeolite catalysts The present invention is directed to a process for treating hydrotreated naphtha which involves treating the naphtha over massive nickel catalyst followed by treating the naphtha over a metal oxide under conditions effective for removing impurities from s... | 04/21/1992 |
| 5098556 | Treatment of off-specification white mineral oil made by two stage hydrogenation The invention relates to a method for removing RCS from off-spec white mineral oil prepared by catalytic hydrogenation by filtering the off-spec white mineral oil through a bleaching clay, such as a smectite clay, particularly an acid treated montmorillon... | 03/24/1992 |
| 5062948 | Mercury removal from liquid hydrocarbon compound The invention provides a method for removing mercury from a liquid hydrocarbon feed material by (a) removing those components having a higher molecular weight than the desired hydrocarbon from the feed material, (b) removing water from the feed material, ... | 11/05/1991 |
| 5059303 | Oil stabilization A method for stabilizing oil is provided. An oil fraction having hydrocarbons with an initial boiling point of about 200° F. to about 1050° F. is hydrotreated to reduce the nitrogen content of the oil fraction to be stabilized. Subsequently, condensed a... | 10/22/1991 |
| 4997544 | Hydroconversion process This invention provides a fixed bed of nonuniformly sized grade catalyst particles for hydrocracking or hydrodesulfurization. The graded particles are arranged with the largest particles in either the upstream or the downstream portion of the bed. In eith... | 03/05/1991 |
| 4946582 | Method of removing mercury from hydrocarbon oils A method of selective and efficient removal of mercury from a hydrocarbon oil comprising contacting said oil with a cupric and/or stannous compound forming a reaction system. The purified hydrocarbon oil can be readily separated from the reaction system. ... | 08/07/1990 |
| 4935399 | Reduction of hydrocarbon losses in a molecular sieve hydrocarbon treating system Molecular sieves are used to remove sulfur compounds (e.g., COS and H2 S) from liquid hydrocarbon streams, particularly liquid propane. During regeneration of the sieves, some of the liquid hydrocarbons remains on the sieves and is lost be vapo... | 06/19/1990 |
| 4935400 | Reduction of hydrocarbon losses in a molecular sieve hydrocarbon treating system Molecular sieves are used to remove sulfur compounds (e.g., COS and H2 S) from liquid hydrocarbon streams, particularly liquid propane. During regeneration of the sieves, some of the liquid hydrocarbons remains on the sieves and is lost by vapo... | 06/19/1990 |
| 4915817 | Process for the flexible production of high-quality gas oil An improved process for the flexible production of high-quality gas oil from two crude gas oil feedstocks deriving from primary fractionation consisting of subjecting the heavy crude gas oil feedstock to catalytic dewaxing in the presence of hydrogen, add... | 04/10/1990 |
| 4849095 | Process for hydrogenating a hydrocarbonaceous charge stock A process for hydrogenating a hydrocarbonaceous charge stock containing nitrogen, sulfur or halogen-based impurities which process comprises the steps of: (a) contacting the hydrocarbonaceous charge stock in the presence of hydrogen with a hydrogenation c... | 07/18/1989 |
| 4846962 | Removal of basic nitrogen compounds from extracted oils by use of acidic polar adsorbents and the regeneration of said adsorbents Basic nitrogen compounds (BNC) are selectively removed from solvent extracted oils by adsorption of said BNC's by solid acidic polar adsorbents. The oils are extracted using any of the common extraction solvents, such as furfural, phenol, SO2, ... | 07/11/1989 |
| 4831208 | Chemical processing with an operational step sensitive to a feedstream component The present invention relates to a chemical process involving a processing step which is sensitive to the presence of at least one component contained within the stream to be processed and to an economical and efficient method of temporarily removing such... | 05/16/1989 |
| 4719007 | Process for hydrotreating a hydrocarbonaceous charge stock A process for hydrotreating a hydrocarbonaceous charge stock having hydrogenatable hydrocarbonaceous compounds which process comprises the steps of: (a) contacting said hydrocarbonaceous charge stock in the presence of hydrogen with a hydrogenation cataly... | 01/12/1988 |
| 4423278 | Removing color from polyphenylated alkane Color may be removed from colored polyphenylated alkane by contacting this material with certain adsorbants. The adsorbants provided comprise certain crystalline zeolites in a silica alumina matrix and bauxite clay having at least one material selected fr... | 12/27/1983 |
