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| Number | Title | Issue Date |
| 7989669 | Recycle of DME in an oxygenate-to-olefin reaction system This invention is directed to a process for producing one or more olefins from an oxygenate feed. According to the invention, an oxygenate stream is provided and a recycle stream is added to the oxygenate stream to form a feed stream to an oxygenate-to-olefin conver... | 08/02/2011 |
| 7989668 | Lowering nitrogen-containing Lewis bases in molecular sieve oligomerisation Nitrogen-containing Lewis bases act as poisons for molecular sieve catalysts used in oligomerisation reactions. A lowering of their presence in the feed prior to the contacting thereof with the molecular sieve brings a significant extension of catalyst life. Excessi... | 08/02/2011 |
| 7956227 | Oligomerization of hydrocarbons Methods of oligomerizing hydrocarbons are disclosed. These methods include contacting olefins with an oligomerization catalyst in an oligomerization zone under oligomerization reaction conditions. ... | 06/07/2011 |
| 7880046 | Low corrosion in zeolite oligomerisation Water reacts on molecular sieve catalysts used in oligomerization reactions and forms oxygenated compounds, in particular organic acids that may cause corrosion problems downstream of the reactor, in particular in distillation tower overhead systems and downstream t... | 02/01/2011 |
| 7420096 | Olefin oligomerization Limiting the sulphur level in olefin feedstocks to zeolite-catalysed oligomerization enhances selectivity to trimer and catalyst life and activity. ... | 09/02/2008 |
| 7414165 | Oligomerization process In a process for oligomerizing an olefinic hydrocarbon feedstock comprising sulfur-containing molecules, the feedstock is contacted in the absence of hydrogen with a first metal oxide catalyst at a temperature in excess of 150° C. and then is contacted under olefin... | 08/19/2008 |
| 7329788 | Process for producing gasoline components Process for producing gasoline components. The process comprises feeding a fresh olefinic hydrocarbon feedstock to a reaction zone, in which its structure is first isomerized. The isomerized hydrocarbon is drawn out of the first reaction zone and conducted to a seco... | 02/12/2008 |
| 7309805 | Method and system to contact an ionic liquid catalyst with oxygen to improve a chemical reaction In an embodiment, a method is disclosed to increase the activity of an ionic liquid catalyst comprising contacting an ionic liquid catalyst with oxygen. In another embodiment, a method is disclosed comprising introducing into a reaction zone a monomer feed and an io... | 12/18/2007 |
| 7273542 | Process and apparatus for recovering olefins The present invention relates to a process and apparatus for recovering product from reactor effluent of a reactor for a hydrocarbon feedstream. An indigenous C4 stream is used as lean oil in a demethanizer, which facilitates significant cost and operatio... | 09/25/2007 |
| 7253330 | Oligomerization process In a process for oligomerizing an olefinic hydrocarbon feedstock comprising sulfur-containing molecules, the feedstock is contacted in the absence of hydrogen with a first metal oxide catalyst at a temperature in excess of 150° C. and then is contacted under olefin... | 08/07/2007 |
| 7238844 | Olefin oligomerization This invention is to a method of oligomerizing an olefin feed stream. The olefin feed stream contains at least one C2 to C12 olefin to obtain an olefin feed stream and has less than 1,000 ppm by weight oxygenated hydrocarbon. The olefin is olig... | 07/03/2007 |
| 7183450 | Olefin oligomerization This invention is to a method of oligomerizing an olefin feed stream. The olefin feed stream contains at least one C2 to C12 olefin to obtain an olefin feed stream and has from about 1,000 ppm to about 10 percent by weight oxygenated hydrocarbo... | 02/27/2007 |
| 7172815 | Low gauge stretch wrap film Stretch wrap films are used to hold goods to pallets during storage and shipping. A multilayer stretch wrap film with at least one outer layer of polypropylene and other layers of blends of polyethylenes. The film of the present invention optimizes physical properti... | 02/06/2007 |
| 7153432 | Method of purifying Fischer-Tropsch derived water A process for the production of highly purified water 38 from Fischer-Tropsch reaction water 12, includes at least the steps of a primary treatment stage comprising an equilibrium staged separation process 14 having at least one stage for removi... | 12/26/2006 |
| 7067597 | Process of making polypropylene from intermediate grade propylene This invention concerns using an intermediate grade propylene stream as feed to a polypropylene forming reaction system. The intermediate grade propylene stream is preferably recovered form the olefin product of an oxygenate to olefins reaction process, and low in d... | 06/27/2006 |
| 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 |
| 6987152 | Feed purification at ambient temperature A method for olefin polymerization is provided. A feed stream comprising more than 0.1 ppm by volume of oxygen and 0.3 ppm by volume of water is passed through a first packed bed to selectively remove at least a portion of the oxygen. The feed stream is then passed ... | 01/17/2006 |
| 6963018 | Integrated processes for olefin and polyolefin production Novel processes for the production of polyolefins, other polymers, and oxygenated compounds, such as polypropylene, polyethylene, polybutene-1, poly(isobutylene), polystyrene, poly(1,3-butadiene), ethylene oxide, propylene oxide, acrylonitrile, acrolein and others, ... | 11/08/2005 |
| 6916448 | Process for selective production of propylene from hydrocarbon fractions with four carbon atoms For the selective production of propylene from an olefinic C4 fraction, a process is implemented that successively comprises: 1) the selective hydrogenation of butadiene with isomerization of butene-1 into butene-2;... | 07/12/2005 |
| 6884914 | Olefin oligomerization This invention is to a method of oligomerizing an olefin feed stream. The olefin feed stream contains at least one C2 to C12 olefin to obtain an olefin feed stream and has less than 1,000 ppm by weight oxygenated hydrocarbon. The olefin is olig... | 04/26/2005 |
| 6841711 | Process for making a lube base stock from a lower molecular weight feedstock in a catalytic distillation unit A process for making a lube base stock wherein an olefinic feedstock is contacted with an oligomerization catalyst in a catalytic distillation unit to produce a product having a higher number average molecular weight than the olefinic feedstock. That product is sepa... | 01/11/2005 |
| 6740790 | Making an olefin product from an oxygenate Disclosed is a method for making olefin product from an oxygenate-containing feedstock. In the method, a silicoaluminophosphate molecular sieve catalyst is contacted with the oxygenate-containing feedstock in a reactor at an average catalyst feedstock exposure index... | 05/25/2004 |
| 6706936 | Process for making a lube base stock from a lower molecular weight feedstock A process for making a lube base stock wherein a highly paraffinic feedstock is dehydrogenated to produce an olefinic feedstock. That olefinic feedstock is contacted with an oligomerization catalyst in an oligomerization zone to produce a product having a higher num... | 03/16/2004 |
| 6686511 | Process for making a lube base stock from a lower molecular weight feedstock using at least two oligomerization zones A process for making a lube base stock wherein an olefinic feedstock is separated into a light olefin fraction and a medium olefin fraction. The light olefin fraction is contacted with a first oligomerization catalyst in a first oligomerization zone to pr... | 02/03/2004 |
| 6660812 | Production of olefin derivatives Disclosed is a system of making an olefin derivative from a dilute olefin feed. Dilute olefin is sent to an olefin reaction unit to form an olefin derivative product. The olefin derivative product is recovered from the reaction unit while a vent stream is... | 12/09/2003 |
| 6652737 | Production of naphtha and light olefins Disclosed is a method for treating naphtha. The method comprises providing naphtha feed, and the naphtha feed comprises naphthene ring-containing compounds. The naphtha feed is contacted with a ring opening catalyst containing a Group VIII metal under con... | 11/25/2003 |
| 6518473 | Dimerizing olefins to make lube base stocks Lube base stock compositions, and methods for preparing the compositions, are disclosed. The methods involve subjecting a predominantly C5-11 olefin-containing feedstock to dimerization conditions, preferably using nickel ZSM-5 as the dimerizat... | 02/11/2003 |
| 6420619 | Cracked gas processing and conversion for propylene production The C3 to C6 cut from a cracking process containing propylene, butane, 1-butene, 2-butene and acetylenic and diene components including butadiene are preferentially converted to propylene. The cut is simultaneously fractionated and c... | 07/16/2002 |
| 6358482 | Facility for the production of isobutene and propylene from hydrocarbon cuts containing four carbon atoms A facility for converting an olefinic C4 cut to isobutene and propylene comprising, in succession: 1) a zone 1 for selective hydrogenation of olefins in the olefinic C4 cut with simultaneous isomerisation of butene-1 to butene-2, said zone comp... | 03/19/2002 |
| 6207115 | Process and plant for the conversion of olefinic C4 cuts to polyisobutene and to propylene The present invention concerns a process for the conversion of an olefinic C4 cut to polyisobutene and to propylene by metathesis. The process comprises three successive steps: (1) selective hydrogenation of diolefins with simultaneous isomeris... | 03/27/2001 |
| 6118037 | Process for the removal of contaminant compounds containing one or more heteroatoms of sulfur, nitrogen and/or oxygen from hydrocarbon streams Process for the removal of contaminant compounds containing one or more heteroatoms of sulfur, nitrogen and/or oxygen from hydrocarbon streams characterized in that it comprises: an adsorption step in which said compounds are adsorbed by means of an adsor... | 09/12/2000 |
| 6080826 | Template-directed ring-closing metathesis and ring-opening metathesis polymerization of functionalized dienes Functionalized cyclic olefins and methods for making the same are disclosed. Methods include template-directed ring-closing metathesis ("RCM") of functionalized acyclic dienes and template-directed depolymerization of functionalized polymers possessing re... | 06/27/2000 |
| 6075173 | Process for production of isobutene and propylene from hydrocarbon cuts containing four carbon atoms The present invention concerns a process for the production of isobutene and propylene by metathesis of an olefinic C4 cut. The process comprises three successive steps: 1) selective hydrogenation of butadiene with isomerisation of butene-1 to ... | 06/13/2000 |
| 5994601 | Process for preparing butene oligomers from Fischer-Tropsch olefins A process is described in which butene oligomers are prepared from Fischer-Tropsch olefins, in which the butenes present in a C4 fraction of Fischer-Tropsch hydrocarbons are oligomerized to obtain dibutene. The dibutene can be fractionated in a... | 11/30/1999 |
| 5981818 | Integrated cracking and olefins derivative process utilizing dilute olefins A novel process is provided which integrates the cracking of hydrocarbon containing feedstocks with the olefins purification and olefins derivative process utilizing dilute olefin feedstocks.... | 11/09/1999 |
| 5877365 | Process and plant for the conversion of olefinic C4 cuts to polyisobutene and to propylene The present invention concerns a process for the conversion of an olefinic C4 cut to polyisobutene and to propylene by metathesis. The process comprises three successive steps: (1) selective hydrogenation of diolefins with simultaneous isomeris... | 03/02/1999 |
| 5866751 | Energy recovery and transport system A safe, environmentally sound method for transporting energy-containing hydrocarbons from a remote natural gas source of hydrocarbons to a local site for further processing or refining. The natural gas is converted at the remote site, using a modified Fis... | 02/02/1999 |
| 5811608 | Process for oligomer production and saturation A process for the production of saturated oligomers by the oligomerization of light olefins to heavier olefins and the saturation of the heavy olefins is improved by the recycle of the heavy paraffins to the oligomerization zone. The recycle of the heavy ... | 09/22/1998 |
| 5789643 | Process for oligomerizing I-butene comprising hydroisomerizing portion of condensate and recycling the hydroisomerate to fractionation The i-butene present in a C4 raffinate I is subjected in a first step to a first hydroisomerization. The hydroisomerization product is subjected to fractional distillation, with essentially 2-butene and n-butane being obtained as bottom product... | 08/04/1998 |
| 5744686 | Process for the removal of nitrogen compounds from an aromatic hydrocarbon stream This invention relates to a process for the removal of nitrogen compounds from an aromatic hydrocarbon stream comprising the nitrogen compounds by contacting the hydrocarbon stream with a selective adsorbent having an average pore size less than. about 5.... | 04/28/1998 |
