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| Number | Title | Issue Date |
| 7935855 | Process and apparatus for treating a feed comprising butadiene The invention concerns a process and apparatus for treating a feed comprising ethylenic and acetylenic compounds. In the process of the invention, the feed is sent to a distillation step, a C4 cut and a C5+ cut are recovered, a drawn fraction comprising acetylenic c... | 05/03/2011 |
| 7393993 | Method for removal of acetylenes from hydrocarbon streams The process of the invention comprises contacting a hydrocarbon stream, comprising light olefins plus impurities such as acetylenes, in the absence of hydrogen with a supported copper catalyst, preferably CuO/alumina. The acetylene component undergoes a coupling rea... | 07/01/2008 |
| 7368618 | Process for removal of oxygenates from a paraffin stream The present invention comprises a process for removal of oxygenates from a paraffin-rich or olefin-rich paraffin stream which comprises passing a feed stream, comprising one or more C10 to C15 feed paraffins or C10 to C15 ... | 05/06/2008 |
| 7351327 | Process for the selective desulfurization of a mid range gasoline cut A process for concurrently fractionating and treating a full range naphtha stream. The full boiling range naphtha stream is first subjected to simultaneous thioetherification and splitting into a light boiling range naphtha, an intermediate boiling range naphtha and... | 04/01/2008 |
| 7329787 | Process for transforming hydrocarbons into a fraction having an improved octane number and a fraction with a high cetane index A process is described for transforming an initial hydrocarbon feed containing 4 to 15 carbon atoms, limits included, into a hydrocarbon fraction having an improved octane number and a hydrocarbon fraction with a high cetane number. ... | 02/12/2008 |
| 7250106 | Flexible process for the production of oil bases and middle distillates with a converting pretreatment stage followed by a catalytic dewaxing stage For the production of high quality base oils with production of high quality middle distillates, feedstocks are obtained from the distillation of crude or from units for transformation and refining of the latter, there are provided a converting pretreatment stage of... | 07/31/2007 |
| 7223894 | Process for total hydrogenation using a catalytic reactor with a hydrogen-selective membrane A process for total hydrogenation of polyunsaturated compounds that have n nonsaturations that are contained in a hydrocarbon feedstock in the presence of a catalytic reactor with a hydrogen-selective membrane is described. This process comprises the introduction of... | 05/29/2007 |
| 7175754 | Process for the production of low benzene gasoline A process for the production of low benzene content gasoline is disclosed wherein a full boiling range naphtha is fractionated to produce a light naphtha, a medium naphtha and a heavy naphtha. The benzene is contained in the medium naphtha and this stream is subject... | 02/13/2007 |
| 7090766 | Process for ultra low sulfur gasoline A process wherein all of the unsaturates within a cracked naphtha stream are substantially hydrogenated to alkanes and the olefin depleted stream is then subjected to hydrodesulfurization to achieve the desired sulfur levels without the formation of recombinant merc... | 08/15/2006 |
| 7074971 | Recovery of ethylene and propylene from a methanol to olefin reaction system The present invention provides new highly-efficient separation processes and systems for separating polymerization-grade ethylene and propylene from an initial effluent stream comprising ethane, ethylene, propylene, dimethyl ether, and one or more of propane, acetyl... | 07/11/2006 |
| 7060865 | Recovery of C4 olefins from a product stream comprising C4 olefins, dimethyl ether and C5+ hydrocarbons Disclosed is a process for removing DME from a stream containing C4 olefins. The process includes providing a first stream comprising C4 olefins, C5+ hydrocarbons, DME, and methanol. The first stream is separated into a second stream comprising the C4 olefins and th... | 06/13/2006 |
| 6855853 | Process for the production of low benzene gasoline A process for the production of low benzene content gasoline is disclosed wherein a full boiling range naphtha is fractionated to produce a light naphtha, a medium naphtha and a heavy naphtha. The benzene is contained in the medium naphtha and this stream is subject... | 02/15/2005 |
| 6835301 | Production of low sulfur/low aromatics distillates A process for hydroprocessing a hydrotreated liquid distillate stream to produce a stream exceptionally low in sulfur as well as aromatics. A hydrotreated distillate stream is further hydrotreated in a co-current reaction zone wherein the reaction product is passed ... | 12/28/2004 |
| 6830678 | Process of desulphurizing gasoline comprising desulphurization of the heavy and intermediate fractions resulting from fractionation into at least three cuts The invention relates to a process of producing gasoline with a low sulphur content from a feedstock containing sulphur. This process comprises at least one step a1 of selectively hydrogenating the diolefins and acetylenic compounds, at least one separation of the g... | 12/14/2004 |
| 6824676 | Process for the selective desulfurization of a mid range gasoline cut A process for concurrently fractionating and treating a full range naphtha stream. The full boiling range naphtha stream is first subjected to simultaneous thioetherification and splitting into a light boiling range naphtha, an intermediate boiling range naphtha and... | 11/30/2004 |
| 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 |
| 6740787 | Process for treatment of C4 hydrocarbons that comprise butadiene and acetylene compounds that comprise stages for distillation and selective hydrogenation A process for treatment of a batch with four carbon atoms that contains diene compounds and a minor portion of acetylene compounds is described. A portion of the fluid that circulates in a distillation zone that is enriched with acetylene compounds is drawn off late... | 05/25/2004 |
| 6632414 | Mini-structured catalyst beds for three-phase chemical processing Three-phase chemical hydrogenation reactions involving the processing of gas-liquid reactant feed streams over "mini-structured" solid catalyst beds formed e.g., of channeled honeycomb monoliths incorporating solid catalysts achieve reaction efficiencies ... | 10/14/2003 |
| 6620982 | Method of producing purified cyclopentane A process for producing cyclopentane from by-product streams containing cyclopentene consists of distilling the cyclopentene from the feedstream and then hydrotreating the cyclopentene-containing fraction to cyclopentane. A second distillation step may th... | 09/16/2003 |
| 6495030 | Process for the desulfurization of FCC naphtha A process for concurrently fractionating and hydrotreating of a full range naphtha stream. The full boiling range naphtha stream is first subjected to simultaneous thioetherification and fractionation to remove the mercaptans the light fraction and then t... | 12/17/2002 |
| 6486369 | Process for selective hydrogenation of an olefinic feed stream containing acetylenic and diolefinic impurities A process for selective hydrogenation of a C2 and C3 olefinic feed stream containing acetylenic and diolefinic impurities whereby the acetylenes and diolefins impurities are selectively hydrogenated concurrently in a vapor phase proc... | 11/26/2002 |
| 6468399 | Process for isolating cyclopentane and/or cyclopentene Cyclopentane and/or cyclopentene and, if desired, isopentane can be obtained by distillative separation from a pre-benzene fraction or a C5 fraction which has in each case being partially hydrogenated to remove acetylene compounds and diolefins... | 10/22/2002 |
| 6451198 | Process for transforming a gas oil cut to produce a dearomatized and desulphurized fuel with a high cetane number A process for transforming a gas oil cut into a dearomatized fuel with a high cetane number comprises at least one first, deep desulphurization and deep denitrogenation step in which the gas oil cut and hydrogen are passed over a catalyst comprising a min... | 09/17/2002 |
| 6444118 | Process for sulfur reduction in naphtha streams A process for concurrently fractionating and treating of a full range naphtha stream. The full boiling range naphtha stream is first subjected to simultaneous thioetherification or selective hydrogenation and splitting into a light boiling range naphtha, ... | 09/03/2002 |
| 6414205 | Process for the removal of MAPD from hydrocarbon streams A process for the selective hydrogenation of the methyl acetylene and propadiene (MAPD) in a propylene rich stream is disclosed wherein the selective hydrogenation is carried out stepwise (a) first in a single pass fixed bed reactor and then (b) in a dist... | 07/02/2002 |
| 6410811 | Selective hydrogenation process comprising partial separation of hydrogen by a membrane upstream of a reactive column The process of the invention is a process for selective hydrogenation of a hydrocarbon feed containing hydrogen and C2+ hydrocarbons, characterized in that it comprises at least one step for separating a fraction of the hydrogen cont... | 06/25/2002 |
| 6376735 | Process to remove reaction by-products from a selective hydrogenation effluent stream A process for the rejection of heavy reaction by-products from a selective hydrogenation reaction zone effluent containing butadiene and trace amounts of heavy reaction by-products by introducing the selective hydrogenation reaction zone effluent into a b... | 04/23/2002 |
| 6365791 | Process for converting hydrocarbons by treatment in a distillation zone comprising extracting a hydrocarbon cut as a side stream, associated with a reaction zone, and its use for hydrogenating benzene The invention provides a process for converting hydrocarbons in which said feed is treated in a distillation zone associated with a reaction zone, the feed for the reaction zone being drawn off at the height of at least one draw-off level, the effluent fr... | 04/02/2002 |
| 6316646 | Process for the continuous catalytic transformation of organic compounds A process for the continuous catalytic conversion of organic compounds, that, together with unwanted attendant materials, form a starting substance: first the organic compounds of the starting material are purposely extracted by means of condensed fluids.... | 11/13/2001 |
| 6264799 | Process for isolating cyclopentane and/or cyclopentene Cyclopentane and/or cyclopentene and, if desired, isopentane can be obtained by distillative separation from a pre-benzene fraction or a C5 fraction which has in each case being partially hydrogenated to remove acetylene compounds and diolefins... | 07/24/2001 |
| 6261442 | Process for converting hydrocarbons by treatment in a distillation zone comprising withdrawing a stabilized distillate, associated with a reaction zone, and its use for hydrogenating benzene The invention provides a process for converting a hydrocarbon feed in which said feed is treated in a distillation zone producing an overhead vapour distillate and a bottom effluent, associated with an at least partially external reaction zone comprising ... | 07/17/2001 |
| 6221239 | Process for transforming a gas oil cut to produce a dearomatised and desulphurised fuel with a high cetane number A process for transforming a gas oil cut into a dearomatised fuel with a high cetane number comprises at least one first, deep desulphurisation and deep denitrogenation step in which the gas oil cut and hydrogen are passed over a catalyst comprising a min... | 04/24/2001 |
| 6217749 | Process for hydrotreating a hydrocarbon feedstock and apparatus for carrying out same A process for hydrotreating a hydrocarbon feedstock (1) involving the use of at least one hydrotreatment, particularly hydrodesulfurization, reactor (2) and a fractionation unit (3), which latter contains two distinct injection zones (4, 5) for the hydroc... | 04/17/2001 |
| 6210561 | Steam cracking of hydrotreated and hydrogenated hydrocarbon feeds An integrated process for converting a hydrocarbon feedstock having components boiling above about 100° C. into steam cracked products is described. The process first involves passing the feedstock to a hydrotreating zone to effect substantially complete... | 04/03/2001 |
| 6194626 | Process for the purification of a diolefin hydrocarbon stream from a naphtha steam cracker A cyclic process for the purification of a diolefin hydrocarbon stream produced in a naphtha steam cracker to produce a high quality diolefin hydrocarbon stream having extremely low levels of acetylene over an extended period because of the ability to rea... | 02/27/2001 |
| 6156933 | Supercritical hydrogenation Process for the selective hydrogenation of alphatic or aromatic substrates under supercritical or near critical conditions. Hydrogenation is effected using a heterogeneous catalyst in a continuous flow reactor containing a supercritical or near critical r... | 12/05/2000 |
| 6156946 | Biological activation of aromatics for chemical processing and/or upgrading of aromatic compounds, petroleum, coal, resid, bitumen and other petrochemical streams The present invention is a process for transforming aromatic organic compounds and resource materials. The process includes the steps of contacting an organic material selected from the group consisting of single and/or multi-ring aromatic compounds and a... | 12/05/2000 |
| 6153804 | Production of cyclopentane and/or cyclopentene from partially hydrogenated pyrolysis gasoline A process for producing cyclopentane and cyclopentene by fractional distillation of partly hydrogenated pyrolysis gasoline, in which (a) partly hydrogenated pyrolysis gasoline is fractionally distilled in a first distillation column, (b) a C5 hydroc... | 11/28/2000 |
| 6124514 | Process for generating pure benzene from reformed gasoline A process is disclosed for generating pure aromatic compounds from a reformed gasoline which contains aromatic compounds, olefins, diolefin, and triolefins, which comprises the steps of: (a) selectively hydrogenating the olefins, diolefins and triolefins in th... | 09/26/2000 |
| 6118034 | Process for the selective hydrogenation of dienes in reformate flows In the process for the selective hydrogenation of dienes in diene-containing feed streams, a diene-containing feed stream is hydrogenated over a nickel-containing precipitated catalyst at from 40 to 100° C., a pressure of from 3 to 20 bar and a WHSV (wei... | 09/12/2000 |
