Patent application number | Description | Published |
20090221775 | Utilization Of Linear Alpha Olefins In The Production Of Metallocene Catalyzed Poly-Alpha Olefins - The invention is directed to a process for the preparation of lubricant base stocks by contacting alphaolefin feedstocks with single-site metallocene catalysts and recycling unconverted monomers, characterized by a purge step in the recycle. | 09-03-2009 |
20110172466 | Oxidation of Hydrocarbons - In a process for oxidizing a hydrocarbon to the corresponding hydroperoxide, alcohol, ketone, carboxylic acid or dicarboxylic acid, a reaction medium comprising a hydrocarbon is contacted with an oxygen-containing gas in a reaction zone and in the presence of a catalyst comprising a cyclic imide. During the oxidation process, a portion of the reaction medium is continuously or intermittently removed from the reaction zone, is stripped of water and organic acid impurities and then returned to the reaction zone. | 07-14-2011 |
20130165724 | Fluid Bed Reactor with Staged Baffles - The invention relates to a process of alkylating aromatic hydrocarbons, and more particularly a process of making paraxylene by alkylation of benzene and/or toluene with methanol and/or dimethyl ether, and to an apparatus for carrying out said process, the improvement comprising staged injection of one of the reactants, with the stages separated by structured packing so as to minimize at least one of gas phase back-mixing, by-pass phenomena, and gas bubble size. | 06-27-2013 |
Patent application number | Description | Published |
20090036725 | Process To Produce Polyalphaolefins - The present invention relates to processes to produce liquid poly-alpha-olefins comprising:
| 02-05-2009 |
20100292424 | Lubricants from Mixed Alpha-Olefin Feeds - This invention discloses an improved process which employs mixed alpha-olefins as feed over activated metallocene catalyst systems to provide essentially random liquid polymers particularly useful in lubricant components or as functional fluids. | 11-18-2010 |
20110092755 | Production of Para-Xylene by the Methylation of Benzene and/or Toluene - In a process for the production of para-xylene, methanol is preheated to a first temperature, an aromatic feedstock comprising toluene and/or benzene is preheated to a second temperature and the preheated methanol and aromatic feedstocks are fed to a reactor at a first methanol to aromatic feedstock molar ratio. The preheated aromatic feedstock is contacted with the preheated methanol under alkylation conditions in the reactor in the presence of a catalyst so that the methanol reacts with the aromatic feedstock to produce an effluent comprising para-xylene. During the reaction, a temperature is measured within the reactor and is compared with a predetermined optimal temperature. The methanol to aromatic feedstock molar ratio is then adjusted in a manner to reduce any difference between the measured and predetermined optimal temperatures in the reactor. | 04-21-2011 |
20110092756 | Production of Para-Xylene by the Methylation of Benzene and/or Toluene - In a process for the production of para-xylene, an aromatic feedstock comprising toluene and/or benzene is reacted with methanol under alkylation conditions in a reactor in the presence of a fluidized bed of solid catalyst particles to produce a vapor phase effluent comprising para-xylene, water, unreacted toluene and/or benzene and solid catalyst fines. The vapor phase effluent is contacted with a liquid hydrocarbon quench stream under conditions to condense a minor portion of the vapor phase effluent and produce a condensate which contains at least some of the catalyst fines and which is substantially free of an aqueous phase. The condensate containing said catalyst fines is then separated from the remainder of the vapor phase effluent. | 04-21-2011 |
20120296143 | Process for the Purification of Paraxylene - The proposed process uses crystallization technology to purify paraxylene simultaneously of large concentrations of C8 aromatics and also small concentrations of oxygenated species. | 11-22-2012 |
20120316375 | Production of Para-Xylene - The invention is a process for producing paraxylene, benzene and/or toluene is alkylated with methanol in the presence of a catalyst under conditions effective to convert said benzene and/or toluene to xylene and produce a product stream containing water, xylene and one or more phenolic impurities. The said product stream is separated into a water-rich stream and a xylene-rich stream containing one or more phenolic impurities and at least a portion of the xylene-rich stream is contacted with an aqueous solution of a base under conditions to remove at least some of the phenolic impurities from the xylene-rich stream portion. | 12-13-2012 |
20130217940 | Alkylation of Benzene and/or Toluene with Methanol - The present inventors have surprisingly discovered that paraxylene selectivity is found to increase as the amount of coke on catalyst increases. In embodiments the paraxylene selectivity and productivity is maximized by controlling the amount of coke on the catalyst while maintaining xylene yield at an acceptable value. The control of coke may be achieved by one or a combination of the following techniques: increasing catalyst on-oil time, decreasing catalyst residence time in the regenerator, reducing the air or oxygen supply to the regenerator, and decreasing catalyst circulation rate, or a combination thereof. | 08-22-2013 |
20130237737 | Process for the Purification of Paraxylene - The proposed process uses crystallization technology to purify paraxylene simultaneously of large concentrations of C8 aromatics and also small concentrations of oxygenated species. | 09-12-2013 |
20130245343 | New Poly Alpha Olefin Compositions - This invention is directed to a poly alpha olefin (PAO) composition formed in a first oligomerization, wherein at least portions of the PAO have properties that make them highly desirable for a subsequent oligomerization. A preferred process for producing this PAO uses a single site catalyst at high temperatures without adding hydrogen to produce a low viscosity PAO with excellent Noack volatility at high conversion rates. This PAO comprises a dimer product with at least 25 wt % tri-substituted vinylene olefins wherein said dimer product is highly desirable as a feedstock for a subsequent oligomerization. This PAO also comprises trimer and optionally higher oligomer products with outstanding properties that make these products useful as lubricant basestocks following hydrogenation. | 09-19-2013 |
20130245344 | Poly Alpha Olefin Compositions - Poly alpha olefins (PAOs) are characterized by very low viscosity and excellent Noack volatility. A preferred process for synthesizing said PAOs involves first oligomerizing low molecular weight linear alpha olefins in the presence of a single site catalyst at high temperatures without adding hydrogen and then subsequently oligomerizing at least a portion of the product from the first step in the presence of an oligomerization catalyst. | 09-19-2013 |
20130253244 | Process to Produce Improved Poly Alpha Olefin Compositions - This invention is directed to a two-step process for the preparation of improved poly alpha olefins wherein the first step involves oligomerizing low molecular weight linear alpha olefins in the presence of a single site catalyst and the second step involves oligomerization of at least a portion of the product from the first step in the presence of an oligomerization catalyst. The dimer product from the first oligomerization is characterized by a tri-substituted vinylene olefin content of at least 25 wt %. | 09-26-2013 |
20130253245 | Alkylation Process - The invention relates to the production of paraxylene by an alkylation process that also produces oxygenates. The process is controlled to utilize recycle to minimize said oxygenates. | 09-26-2013 |
20140378720 | Processes to Produce Polyalpha-Olefin Compositions - A process to produce polyalpha-olefins includes contacting a feed stream of at least one alpha-olefin monomer having 4 to 25 carbon atoms with a metallocene catalyst compound and an activator, and optionally an alkyl-aluminum compound, under polymerizations conditions in a reactor. The alpha-olefin monomer is present at 10% volume or more in the reactor and the feed stream includes less than 600 ppm of heteroatom containing compounds. The process further includes obtaining a polyalpha-olefin with at least 50 mole % C5 to C24 alpha-olefin monomer and kinematic viscosity at 100° C. of 5000 cSt or less. | 12-25-2014 |
Patent application number | Description | Published |
20090005279 | Polyalpha-Olefin Compositions and Processes to Produce the Same - This invention relates to a polyalpha-olefin (and hydrogenated analogs thereof) comprising more than 50 mole % of one or more C5 to C24 alpha-olefin monomers where the polyalpha-olefin has: a) 40 mole % or more of mm triads, b) a Bromine number of Y or greater, where Y is equal to 89.92*(V)′°5863, where V is the Kinematic Viscosity of the polyalpha-olefin measured at 100° C. in cSt, and c) 1,2 disubstituted olefins present at 7 mole % or more, preferably having Z mole % or more of units represented by the formula: where j, k and m are each, independently, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, or 22, n is an integer from 1 to 350, and where Z=8.420*Log(V)−4.048, where V is the kinematic viscosity of the polyalpha-olefin measured at 1000 C in cSt This invention also relates to process to produce such polyalpha-olefins. | 01-01-2009 |
20090247442 | Production of Shear-Stable High Viscosity PAO - The invention is directed to a process for the preparation of high viscosity lubricant base stocks by contacting alphaolefin feedstocks with single-site metallocene catalysts in a mixed flow or continuous stirred tank reactors. | 10-01-2009 |
20100261941 | Process for the Purification of Paraxylene - The proposed process uses crystallization technology to purify paraxylene simultaneously of large concentrations of C8 aromatics and also small concentrations of oxygenated species. | 10-14-2010 |
20130090273 | LOW VISCOSITY ENGINE OIL COMPOSITIONS - This invention is directed to ultra-low viscosity passenger car engine oil compositions with a kinematic viscosity at 100° C. of from 4 to 6 cSt, and comprising in admixture 60 wt % to 90 wt % of a first base oil component, based on the total weight of the composition, the first base oil component consisting of a polyalphaolefin base stock or combination of polyalphaolefin base stocks, each having a kinematic viscosity at 100° C. of from 3.2 cSt to 3.8 cSt; and 0.1 wt % to 20 wt % of a second base oil component, based on the total weight of the composition, the second base oil component consisting of a Group II, Group III or Group V base stock, or any combination thereof; wherein the composition comprises from 0 wt % to less than 0.25 wt % viscosity index improver, on a solid polymer basis. | 04-11-2013 |
20130090277 | LUBRICATING COMPOSITIONS - This invention is directed to lubricating compositions comprising a first base oil component consisting of a polyalphaolefin base stock or combination of polyalphaolefin base stocks, each having a kinematic viscosity at 100° C. of from 3.2 cSt to 3.8 cSt and obtained by a process comprising: (a) contacting a catalyst, an activator, and a monomer in a first reactor to obtain a first reactor effluent, the effluent comprising a dimer product, a trimer product, and optionally a higher oligomer product, (b) feeding at least a portion of the dimer product to a second reactor, (c) contacting said dimer product with a second catalyst, a second activator, and optionally a second monomer in the second reactor, (d) obtaining a second reactor effluent, the effluent comprising at least a trimer product, and (e) hydrogenating at least the trimer product of the second reactor effluent. | 04-11-2013 |
20130090278 | HIGH EFFICIENCY ENGINE OIL COMPOSITIONS - This invention is directed to passenger car engine oil compositions comprising in admixture | 04-11-2013 |