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| Number | Title | Issue Date |
| 8178730 | Processes related to the hydroformylation of butenes Mixed butene streams containing butene-1 and isobutylene and optionally butene-2 are hydroformylated under conditions that hydroformylates all the monomers to yield a mixture of valeraldehydes. ... | 05/15/2012 |
| 8163825 | Triglyceride plasticizers having low average levels of branching and process of making the same Triglyceride PVC plasticizers can be produced by recovery of C5 to C10 aldehydes having low average levels of branching from a hydroformylation product, oxidizing the aldehydes with oxygen and/or air to form an acid, recovery of the resulting a... | 04/24/2012 |
| 8143459 | Plasticiser alcohol and production improvement Oxo-alcohols in the plasticizer range typically contain small amounts of methyl esters having the same alkyl chain as the alcohol itself. These methyl esters are causing product quality problems and environmental problems because of transesterification in the esteri... | 03/27/2012 |
| 8143438 | Hydrogenation processes The present invention is directed to a process for hydrogenating one or more organic compounds especially unsaturated organic compounds by bringing the compound into contact with a hydrogen-containing gas in the presence of a catalyst, which comprises one or more ca... | 03/27/2012 |
| 8084534 | Plasticised polyvinyl chloride Esters of cyclohexane polycarboxylic acids are used as plasticisers for polyvinyl chloride to enable products with comparable mechanical properties to be obtained using less polyvinyl chloride. Use of these esters also produces formulations with increased stability ... | 12/27/2011 |
| 8022256 | Hydroformylation of butenes comprising isobutylene Mixed butene streams containing butene-1 and isobutylene and optionally butene-2 are hydroformylated under conditions that hydroformylates all the monomers to yield a mixture of valeraldehydes. Higher temperatures and/or longer residence times and/or higher partial ... | 09/20/2011 |
| 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 |
| 7935851 | Isobutylene High purity isobutylene streams are obtained by the hydroformylation of mixed butene streams containing butene-1 and isobutylene (and optionally butene-2) under conditions that hydroformylate primarily butene-1 to yield a mixture of valeraldehyde and isobutylene, wh... | 05/03/2011 |
| 7935850 | Process for hydroformylation of propylene Increasing the propylene content of the propylene feed delivered to a continuous hydroformylation process from the 95 mole % maximum level that is usual in typical chemical grade propylene to at least 97 mole %, for example to the 97.5% level obtainable from the con... | 05/03/2011 |
| 7919649 | Plasticiser esters Esters produced by the catalyzed reaction of alcohols and acids or anhydrides are neutralized by treatment with an aqueous alkaline alkali metal salt solution in an amount that provides less than a stoichiometric amount of alkali metal salt in relation to the acidit... | 04/05/2011 |
| 7910782 | Cobalt recovery from cobalt catalysed hydroformylation reactions In a hydroformylation reaction, the circulation and recovery of cobalt carbonyl in a cobalt catalyst cycle using carbonylate as an intermediate and acidification thereof, is improved by supplying an aqueous sulfuric acid solution containing less than 16% wt of sulfu... | 03/22/2011 |
| 7893295 | Hydrogenation of benzene polycarboxylic acids or derivatives thereof A process for hydrogenating benzenepolycarboxylic acids or derivatives thereof, such as esters and/or anhydrides, by bringing one or more benzenepolycarboxylic acids or one or more derivatives thereof into contact with a hydrogen-containing gas in the presence of on... | 02/22/2011 |
| 7875742 | Hydrogenation processes The present invention is directed to a process for hydrogenating one or more organic compounds especially unsaturated organic compounds by bringing the compound into contact with a hydrogen-containing gas in the presence of a catalyst, which comprises one or more ca... | 01/25/2011 |
| 7855340 | Plasticised polyvinyl chloride Esters of cyclohexane polycarboxylic acids are used as plasticisers for polyvinyl chloride to enable products with comparable mechanical properties to be obtained using less polyvinyl chloride. Use of these esters also produces formulations with increased stability ... | 12/21/2010 |
| 7851221 | Fixed bed reactor The invention provides a system for designing, operating, monitoring and/or diagnosing a chemical reaction, particularly a hydrotreating process, using a fixed bed catalytic reactor. ... | 12/14/2010 |
| 7838605 | Polymerization monitoring and control using improved leading indicators Embodiments of our invention relate generally to methods of monitoring and controlling polymerization reactions including reactions producing multimodal polymer products using multiple catalysts in a single reactor. Embodiments of the invention provide methods of ra... | 11/23/2010 |
| 7834229 | Olefin oligomerization process In a process for oligomerizing an olefinic hydrocarbon feedstock comprising at least 65 wt % olefins and/or sulfur-containing molecules, the feedstock is contacted under oligomerization conditions with (a) a first unidimensional 10-ring molecular sieve catalyst and ... | 11/16/2010 |
| RE41897 | Catalyst composition, method of polymerization, and polymer therefrom Catalyst compositions and methods, useful in polymerization processes, utilizing at least two metal compounds are disclosed. At least one of the metal compounds is a Group 15 containing metal compound and the other metal compound is preferably a bulky ligand metallo... | 10/26/2010 |
| 7803332 | Reactor temperature control The invention is directed to a reactor system comprising at least one reactor wherein makeup water for said system is preheated by water/steam exiting said reactor. In a preferred embodiment the system comprises plural reactors and the invention provides for each re... | 09/28/2010 |
| 7799877 | Polymerization monitoring and control using leading indicators Methods of monitoring and controlling polymerization reactions are disclosed. The ratio of concentrations of two reactor components are determined in a gas stream of a reactor to obtain a leading indicator function L. The value of L or a function of L, such as a res... | 09/21/2010 |
| 7786337 | Olefin oligomerization process In a process for oligomerizing an olefinic hydrocarbon feedstock, the feedstock is contacted under oligomerization conditions with (a) a first crystalline molecular sieve catalyst and (b) a second catalyst comprising a solid phosphoric acid. The first and second cat... | 08/31/2010 |
| 7781547 | Reactor systems for use in polymerization processes The invention relates to new polymerization processes using hydrofluorocarbons to produce polymers. In particular, the invention relates to new polymerization processes using turbulent flow reactor systems using diluents including one or more hydrofluorocarbon(s) to... | 08/24/2010 |
| 7754840 | Bimodal high density polyethlyene The present invention is directed to a bimodal polyethylene comprising ethylene derived units and units derived from at least one of a C4 to C12 olefin; wherein the polyethylene has a density of from 0.940 to 0.970 g/cm3; an I21... | 07/13/2010 |
| 7737315 | Oligomerization of isobutene-containing feedstocks The invention relates to the use of isobutene-containing olefin feedstock in oligomerization reactions, particularly in the production of octenes as feedstock for the manufacture of plasticizer alcohols, the process comprising contacting a feed comprising isobutene ... | 06/15/2010 |
| 7732634 | Hydrogenation processes The present invention is directed to a process for hydrogenating one or more organic compounds especially unsaturated organic compounds by bringing the compound into contact with a hydrogen-containing gas in the presence of a catalyst, which comprises one or more ca... | 06/08/2010 |
| 7714082 | Gas-phase polymerization process to achieve a high particle density A process for increasing a granular particle density of a polymeric product using at least one particle density promoting agent is described. The process includes passing a gaseous stream comprising at least one monomer through a fluidized bed reactor in the presenc... | 05/11/2010 |
| 7700814 | Manufacture of alcohols Acetals are formed from a mixture comprising alcohols and aldehydes and the product is distilled to yield purified alcohols and/or acetals and/or unsaturated ethers. ... | 04/20/2010 |
| 7683140 | Method for determining temperature value indicative of resin stickiness from data generated by polymerization reaction monitoring In some embodiments, a method including the steps of monitoring a polymerization reaction which produces a polymer resin in a fluid bed reactor, where a dry melt reference temperature is characteristic of melting behavior of a dry version of the resin, and in respon... | 03/23/2010 |
| 7667080 | Mixtures of C8-C10 alcohols Mixtures of C8-10 primary alcohols, preferably C9 alcohol rich, comprise from 15 to 70 wt. % unbranched molecules, the balance being branched molecules having an average branchiness of at most 2.00 branches per molecule, at least 80% of the ran... | 02/23/2010 |
| 7666366 | Internal loop reactor and Oxo process using same The invention relates to improvements in internal loop reactors. The reactor of the invention is characterized by a plurality of cooling tubes which form the annulus between the riser and the downcomer path of said internal loop reactor. The reactor also provides im... | 02/23/2010 |
| 7629422 | Process for transitioning between Ziegler-Natta-based and chromium-based catalysts Embodiments of our invention relate to processes for transitioning among polymerization catalyst systems including processes for transitioning among olefin polymerization reactions using Ziegler-Natta catalysts systems and chromium-based catalyst systems. Among embo... | 12/08/2009 |
| 7629413 | Plasticiser compositions C9 to C11 alkyl benzoates are used as plasticisers for polyvinyl chloride in particular in combination with plasticisers such as di-2-ethyl hexyl phthalate, diisononyl phthalate, di-2-propyl heptyl phthalate, diisodecyl phthalate or di-2-ethyl ... | 12/08/2009 |
| 7626066 | Conversion of unsaturated chemicals to oligomers An oligomerization process in which hydrocarbon feedstocks are contacted with a hydrotreating catalyst in the absence of hydrogen and in the liquid phase. The catalyst is a heterogeneous catalyst selected from supported reduced metals, metals oxides, metal sulfides ... | 12/01/2009 |
| 7595364 | High density polyethylene Multimodal polyethylenes possessing a density from 0.940 to 0.965 g/cm3, and an I21 from 4 to 20 dg/min, and comprising a low molecular weight ethylene copolymer having a weight average molecular weight from 5,000 amu to 50,000 amu; and a high ... | 09/29/2009 |
| 7585923 | Polymerization monitoring and method of selecting leading indicators Embodiments of our invention relate generally to methods of monitoring and controlling polymerization reactions including reactions producing multimodal polymer products using multiple catalysts in a single reactor. Embodiments of the invention provide methods of ra... | 09/08/2009 |
| 7582715 | Polymers substantially free of long chain branching The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers substantially free of long chain branching. In particular, the invention relates to copolymers of an isoolefin, preferably i... | 09/01/2009 |
| 7582711 | Ziegler-type catalysts having increased productivity The present invention relates to catalyst systems for polyolefin production, and more particularly, to catalyst systems for polyolefins used in producing films. ... | 09/01/2009 |
| 7579415 | Polymerization process using metallocene catalyst systems The present invention relates to a polymerization process using improved metallocene catalyst systems. Specifically, the catalyst systems of the present invention relate to a metallocene compound having optimized metals loading and activator concentration, and demon... | 08/25/2009 |
| 7566677 | De-foaming spray dried catalyst slurries A method for preparing a spray dried catalyst and a low viscosity, low foam spray dried catalyst system for olefin polymerization are provided. In one aspect, the method includes preparing a catalyst system including one or more components selected from metallocenes... | 07/28/2009 |
| 7563851 | Production of broad molecular weight polyethylene The present invention is directed to the use of aluminum alkyl activators and co-catalysts to improve the performance of chromium-based catalysts. The aluminum alkyls allow for the variable control of polymer molecular weight, control of side branching while possess... | 07/21/2009 |
