Did You Know...
...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8101693 | Multi reactor process This invention relates to the polymerization of ethylene polymers using a continuously stirred tank reactor (CSTR) that is connected in series to a tubular reactor. The tubular reactor receives a polymer solution from the CSTR. Further polymerization in the tubular ... | 01/24/2012 |
| 7816488 | Method to estimate pent values The PENT value for a resin may be estimated within ±10% by determining the % of heat flow to melt a fraction of a polymer above or below a set point and comparing it to a graph or algorithm of PENT values related to the % of heat flow to melt entire sample for a nu... | 10/19/2010 |
| 7741414 | On the fly catalyst transitions A process for transitioning between Ziegler Natta (Z/N) polymerization catalysts and Second Polymerization catalysts in a polymerization system which includes at least two polymerization reactors. During the transition, the Z/N catalyst is used in the “downstream... | 06/22/2010 |
| 7737220 | High density homopolymer blends A blend of ethylene homopolymers contains at least one blend component having a very low molecular weight and a narrow molecular weight distribution. The blend has surprisingly high density and low hexane extractables. The blend is suitable for the manufacture of a ... | 06/15/2010 |
| 7605106 | Telomerization of dienes Alkadienes may be telomerized in the presence of a heterogeneous catalyst comprising an alumina or titania support which is modified with one or more ionic complexes of Pd or Pt and activated at a temperature from 450° C. to 850° C. for a time not less than two ho... | 10/20/2009 |
| 7531602 | Polymer blends A blend of polymers comprising from 5 to 95 weight % of a polymer having a high molecular weight made using a single site type catalyst and from 95 to 5 weight % of a polymer having a lower molecular weight made using a catalyst containing a phenoxide, preferably a ... | 05/12/2009 |
| 7513988 | Aromatic saturation and ring opening process Less conventional sources of hydrocarbon feedstocks such as oil sands, tar sands and shale oils are being exploited. These feedstocks generate a larger amount of heavy oil, gas oil, asphaltene products and the like containing multiple fused aromatic ring compounds. ... | 04/07/2009 |
| 7488392 | Surface on a stainless steel matrix A stainless steel comprising at least 20 weight % of chromium and at least 1.0 weight % of manganese is adapted to support an overcoating having a thickness from 1 to 10 microns of a spinel of the formula MnxCr3−xO4 wherein x is fr... | 02/10/2009 |
| 7476715 | Supported antistatic polymerization catalyst The use of high activity “Single Site” polymerization catalysts often causes the fouling of polymerization reactors. The problem is particularly acute with gas phase polymerizations. While not wishing to be bound by theory it is believed that the fouling is init... | 01/13/2009 |
| 7459413 | Catalyst composition for treating heavy feedstocks The present invention provides a catalyst and a process for its preparation and its use in cracking heavy feedstocks. The catalyst comprises one or more zeolites having a controlled silica to alumina ratio and preferably treated with alkali in the presence of a matr... | 12/02/2008 |
| 7442845 | Conversion of ethers to olefins Ethers are cracked to olefins using a gamma-alumina catalyst in the presence of ammonia. The use of ammonia improves the selectivity to linear alpha olefins in comparison to cracking reactions in the absence of ammonia. The use of ammonia is convenient in comparison... | 10/28/2008 |
| 7383855 | Sanitary tank vent valve A combination pressure relief and vacuum relief valve for mounting on a storage tank is disclosed as having two vertical mounting connections of different elevations; a pressure relief valve mounted on one connection; and a vacuum relief valve mounted on the other c... | 06/10/2008 |
| 7361703 | Phenol free stabilization of polyethylene film This invention provides a process for the stabilization of thermoplastic polyolefins during melt processing operations. The stabilizer package of this invention is “phenol free” and must contain at least one aryl monophosphite and at least one diphosphite. The p... | 04/22/2008 |
| 7323523 | Adjusting polymer characteristics through process control Properties of a polymer produced in gas phase or slurry phase using a dual catalyst such as polydispersity and comonomer incorporation, may be controlled by controlling reaction parameters such as temperature, (co)monomer pressure, hydrogen partial pressure and the ... | 01/29/2008 |
| 7321015 | Adjusting polymer characteristics through process control Properties of a polymer produced using a dual catalyst on the same support, such as polydispersity and comonomer incorporation, may be controlled by controlling reaction parameters such as temperature, monomer pressure, hydrogen partial pressure and the presence of ... | 01/22/2008 |
| 7270316 | Distillation column tray configuration A new tray configuration for a distillation column that utilizes the entire column cross section area as active tray area for vapor/liquid contact. The new tray configuration has no downcomers and utilizes a liquid/vapor seal pan(s) located in the vapor space of the... | 09/18/2007 |
| 7220886 | Olefin metathesis A process for the production of propylene from the metathesis of ethylene and 2-butene is disclosed wherein a mixed C4 stream is first treated to enrich and separate the 2-butene from 1-butene and isobutene by isomerization of 1-butene and concurrent frac... | 05/22/2007 |
| 7214744 | Borate activator A catalyst system comprising (i) a bulky ligand catalyst compound; and (ii) a novel borate activator is active for olefin polymerization. The novel borate contains at least one chelating (divalent) ligand and contains at least one fluorine atom. Preferred borate act... | 05/08/2007 |
| 7211535 | Enhanced polyolefin catalyst The present invention provides a novel process for preparing a catalyst useful in gas phase polymerization of olefins wherein the physical properties of the polymer and the productivity of the catalyst can be altered depending on the sequence of addition of the cata... | 05/01/2007 |
| 7208646 | Selective hydrogenation of butadiene A process for the selective hydrogenation of dienes in mixed streams of olefin containing hydrocarbons, such as butadiene in a mixed C4 stream with minimum loss of monoolefins is disclosed wherein the reactor is operated at conditions which induce pulse f... | 04/24/2007 |
| 7201864 | Rotomolding process with reduced cycle times The cycle time for a rotomolding process is improved through the use of a molding material comprising a blend of at least two polyethylenes having narrow molecular weight distributions and homogeneous comonomer distributions. Alternatively, the molding temperature m... | 04/10/2007 |
| 7196035 | Ni hydrogenation catalysts, manufacture and use Improved Ni catalysts for hydrogenation reactions are disclosed. The catalysts are useful for hydrogenation such as selective hydrogenation of acetylenic impurities in crude olefin and diolefin streams. The catalysts are prepared by depositing nickel on a porous sup... | 03/27/2007 |
| 7189887 | Process for removing naphthalene from alkylaromatics A process for the reduction of naphthalene in process streams containing alkylaromatic solvents. Naphthalene is contacted with alkylbenzenes in a distillation column reactor in the presence of transalkylation catalyst to produce alkylnaphthalenes which are concurren... | 03/13/2007 |
| 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 |
| 7153415 | Process for the treatment of light naphtha hydrocarbon streams A light cracked naphtha is treated to convert mercaptans to sulfides and saturate dienes and then subjected to destructive hydrodesulfurization (HDS) to convert the organic sulfur compounds to hydrogen sulfide. The recombinant mercaptans formed by reaction of hydrog... | 12/26/2006 |
| 7154013 | Olefin metathesis A process in which tetramethylethylene and neohexene are produced by starting with butene in a distillation column reactor to produce a product containing ethylene, diisobutene, tetramethylethylene, heavier oligomers. After separating these components, the separated... | 12/26/2006 |
| 7145049 | Oligomerization process Alkenes, such as normal butenes in a mixed C4 stream are oligomerized, preferably to dimers, which are dimerized in a distillation column reactor over ZSM-57 zeolite catalyst at high conversions and high selectivity to octenes. Prior to oligomerization th... | 12/05/2006 |
| 7141705 | Etherification process A process for the etherification of C4, C5 and/or C6 tertiary olefins in a hydrocarbon feed with at least one C1 to C6 alcohol, preferably C1–C4 alcohols in a distillation column reactor,... | 11/28/2006 |
| 7128139 | External ribbed furnace tubes In a radiant heating box there is a convection current which flows over the surface of tubes in the box. Adding ribs to the external surface of vertical tubes provides an enhancement to the heat transfer by convection and increases the heat transfer to the tubes. | 10/31/2006 |
| 7126038 | Method of removing entrained sulfuric acid from alkylate An improvement in the alkylation of olefins with isoalkanes in the presence of sulfuric acid wherein the sulfuric acid is removed from the product by a mechanical coalescer means prior to fractionation. No water wash or caustic treatment is required. Any sulfonates ... | 10/24/2006 |
| 7125484 | Downflow process for hydrotreating naphtha A process for the treatment of light naphtha hydrocarbon streams is disclosed wherein the mercaptans contained therein are reacted with diolefins simultaneous with fractionation into a light stream and a heavy stream. The heavy stream is then simultaneously treated ... | 10/24/2006 |
| 7119244 | Method of removing organic sulfur compounds from alkylate A process for the removal of organic sulfur compounds, primarily oxygenated organic compounds, such as sulfates and sulfonic esters from a hydrocarbon liquid is disclosed which comprises contacting the hydrocarbon liquid with a coalescer comprising a mesh material w... | 10/10/2006 |
| 7091252 | Liquid-continuous column distillation Bubble columns fractionate with vapor-liquid mass transfer efficiencies approaching that of distillation towers when vapor velocities in excess of 50% of jet flood are used. If the vapor velocities are pushed above about 70% of jet flood then the distillation perfor... | 08/15/2006 |
| 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 |
| 7078469 | Halogenated organic particles for catalyst supports Polymeric supports, which have been treated with a halosulfonic acid, increase the activity of single-site catalysts used with aluminoxane co-catalysts, resulting in improved ethylene polymerization. The present invention seeks to provide polymeric catalyst supports... | 07/18/2006 |
| 7074951 | Process for making dialkyl carbonates A process for the production of dialkyl carbonates from the reaction of alcohol, for example C1–C3 alcohols, with urea is disclosed wherein the water and ammonium carbamates impurities in the feed are removed in a prereactor. The water is rea... | 07/11/2006 |
| 7069670 | Protective foot wear Protective foot wear having a shoe body, an elastomeric inner body, which has a sock portion and a sleeve, the sock portion being position in and attached to said shoe body. The sleeve extends from said shoe body. A shield is attached to the sleeve and the shield is... | 07/04/2006 |
| 7066068 | Table saw A table saw having a frame to support a powered saw blade, a work surface moveably mounted on the frame, the work surface having at least two portions with a space therebetween to allow the saw blade to pass between the two portions. The work surface portions are jo... | 06/27/2006 |
| 7064096 | Dual catalyst on a single support Bimodal polyolefins having a reverse or partial reversed comonomer incorporation may be prepared in the presence of a dual catalyst on the same support wherein each catalyst has a different response to temperature, ethylene partial pressures, partial pressure of non... | 06/20/2006 |
| 7045669 | Dual pressure catalytic distillation hydrogenation column system for the front end of an ethylene plant The charge gas from the thermal cracking of a hydrocarbon feedstock is processed in a front-end catalytic distillation hydrogenation system of an olefins plant to more effectively recover ethylene and propylene product and to process the by-products. The rate of fou... | 05/16/2006 |
