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| Number | Title | Issue Date |
| 8124019 | Clog-resistant pump assembly for slurry loop reactor The pump assembly includes an impeller rotatably mounted in a pipe of the reactor having blades that generate a flow of fluid slurry through the pipe, a nosecone protruding in an upstream direction in front of the impeller blades that rotates along with the blades, ... | 02/28/2012 |
| 8034297 | Transfer pipe between loop reactors The present invention discloses a transfer system between the first and second reactors in a double loop reactor that is equipped to reduce clogging in the transfer lines by providing a regulation mechanism arranged to insure equivalent flushing in each transfer lin... | 10/11/2011 |
| 8025847 | Slurry loop reactors Reactor systems suitable for the polymerization of an olefin monomer including first and second loop reactors effective for the polymerization of an olefin monomer and polymers formed therefrom are described herein. Each of said reactors generally include at least o... | 09/27/2011 |
| 7985378 | Flushing in a multiple loop reactor The present invention discloses multiple loop reactor wherein one of the settling legs transferring polymer product from one loop to a further loop can be taken out of service or re-opened without interfering with the operation of said multiple loop reactor. ... | 07/26/2011 |
| 7897115 | Loop reactor for emulsion polymerisation A polymerisation reactor (1) comprising a circulation loop (2), an inlet for raw material (3), an outlet (5), driving means for (6) circulating a reactor charge within the circulation loop (2), and a pig station (7) f... | 03/01/2011 |
| 7820116 | Slurry phase polymerisation process A process comprising polymerizing an olefin monomer optionally together with an olefin comonomer in the presence of a polymerization catalyst in a diluent in a loop reactor which comprises at least 2 horizontal sections and at least 2 vertical sections to produce a ... | 10/26/2010 |
| 7790119 | Slurry phase polymerisation process A process comprising polymerising in a loop reactor an olefin monomer optionally together with an olefin commoner in the presence of a polymerisation catalyst in a diluent to produce a slurry comprising solid particulate olefin polymer and the diluent wherein the Fr... | 09/07/2010 |
| 7767160 | Apparatus for continuously producing polyisocyanate An apparatus for continuously producing polyisocyanate is provided for quickly contacting polyamine and carbonyl chloride in order to suppress an undesirable reaction between polyamine and polyisocyanate so that a by-product can be reduced and the yield of polyisocy... | 08/03/2010 |
| 7744823 | Polymerization reactors with a by-pass line The present invention discloses a slurry loop reactor having at least two loops (1, 2) and comprising a by-pass line (11) connecting two points (12, 13) of the same loop reactor by an alternate route having a different transit time than that of ... | 06/29/2010 |
| 7740808 | Process and apparatus for producing olefin polymers The present invention concerns a process and an apparatus for continuous polymerisation of olefin monomers. In particular, the present invention concerns a process and an apparatus for continuous polymerisation olefin monomers like ethylene and other monomers, where... | 06/22/2010 |
| 7736597 | Pumping apparatus and process for polymerization in loop reactors An olefin polymerization process and apparatus wherein a fluid slurry comprising monomer, diluent and catalyst is circulated in a continuous loop reactor by two or more pumps. The process and apparatus allow operating the reaction at significantly higher solids cont... | 06/15/2010 |
| 7588735 | Production of polyethylene A process of producing polyethylene, the process comprising copolymerizing ethylene and an alpha-olefinic comonomer comprising from 3 to 8 carbon atoms in the presence of a chromium-based catalyst in a main polymerization reactor and, in a gas-phase preliminary reac... | 09/15/2009 |
| 7575724 | Continuous slurry polymerization apparatus A process/apparatus is disclosed for continuously separating a liquid medium comprising diluent and unreacted monomers from a polymerization effluent comprising diluent, unreacted monomers and polymer solids, comprising a continuous discharge of the polymerization e... | 08/18/2009 |
| 7504077 | Method of producing ethylene (di) chloride (EDC) With a method or a device for producing 1,2-dichloroethane or ethylene (di)chloride (EDC) with the use of a circulating reaction medium and a catalyst, whereby ethylene and chlorine are supplied to the reaction medium, the catalytic chlorination of ethylene is achie... | 03/17/2009 |
| 7494627 | Device and method for the optimization of the injection of reactants into a reactor The present invention relates to an injector nozzle defining a passage for a flow of reactants to be injected into a loop reactor suitable for olefin slurry polymerization, consisting essentially of a fluid conduit extending into a discharge orifice portion to be co... | 02/24/2009 |
| 7442748 | Continuous polymerization reactor A process for the continuous polymerization of monomer, the process comprising (a) adding monomer and catalyst to an annulus within an annular reactor to form a polymerization medium within the annulus, where the annulus includes the space between an outer casing wa... | 10/28/2008 |
| 7414098 | Gas-phase catalytic polymerization of olefins Process for the gas-phase catalytic polymerization of olefins carried out in a plurality of interconnected polymerization zones, the process comprising feeding one or more monomers to said polymerization zones in the presence of a catalyst under reaction conditions ... | 08/19/2008 |
| 7410620 | Apparatus for continuous production of polymers in carbon dioxide A method for carrying out the continuous polymerization of a monomer in a carbon dioxide reaction medium comprises the steps of: (a) providing an apparatus including a continuous reaction vessel and a separator; (b) carrying out a polymerization reaction in the reac... | 08/12/2008 |
| 7268194 | Continuous slurry polymerization process and apparatus A process of converting a loop reactor into multiple loop reactors comprising starting with a loop reactor comprising at least 8 vertical legs, at least two non-vertical conversion runs, each non-vertical run connected in fluid flow communication with two vertical l... | 09/11/2007 |
| 7261863 | Closed loop continuous polymerization reactor and polymerization process A closed loop continuous emulsion polymerization apparatus at least comprising a circulation pump, a reactor tube which connects the outlet of the circulation pump to its inlet, at least one feed for supplying raw materials, an outlet, and means for cooling the tube... | 08/28/2007 |
| 7244795 | 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... | 07/17/2007 |
| 7232551 | Fluidized bed method and reactor for the treatment of catalysts and catalyst carriers A method for the treatment of catalysts or catalyst carriers by: a) introducing and distributing a gas in the lower section of a reactor containing a catalyst or catalyst carrier bulk material; b) forming a fluidized bed in the reactor; c) treating the particles in ... | 06/19/2007 |
| 7226565 | Gas-phase fluidized-bed reactor Ethylenically unsaturated monomers are polymerized in a gas-phase fluidized-bed reactor comprising a reactor space (1) in the form of a vertical tube, a calming zone (2) adjoining the upper part of the reactor space, a circulated gas line (3), a... | 06/05/2007 |
| 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 |
| 7214642 | Methods of preparing active chromium/alumina catalysts via treatment with sulfate Methods of preparing a polymerization catalyst are provided that include contacting a support comprising alumina with a sulfating agent and with chromium. In an embodiment in which the chromium is provided from a chromium compound such as chromium oxide, the support... | 05/08/2007 |
| 7192558 | Multi-well rotary synthesizer An apparatus for synthesizing polymer chains includes a controller, a plurality of precision fit vials circularly arranged in multiple banks on a cartridge, a drain corresponding to each bank of vials, a chamber bowl, a plurality of valves for delivering reagents to... | 03/20/2007 |
| 7150998 | Multi-well rotary synthesizer An apparatus for synthesizing polymer chains includes a controller, a plurality of precision fit vials circularly arranged in multiple banks on a cartridge, a drain corresponding to each bank of vials, a chamber bowl, a plurality of valves for delivering reagents to... | 12/19/2006 |
| 7140579 | Sway brace clamp A sway brace clamp supporting pipe of specified outside diameter with mill tolerance includes two elongate bars with each bar having an arcuate section and two straight sections on either end of the arcuate section. Each straight section has an attachment surface wh... | 11/28/2006 |
| 7112643 | Polymers having low levels of long chain branching and methods of making the same Methods of producing a polymer include contacting at least one olefin with a catalyst prepared by contacting a support comprising alumina with a sulfating agent and with chromium. Polymer compositions produced in this manner may exhibit relatively low levels of long... | 09/26/2006 |
| 7098301 | High pressure filter method of separating polymer solids and unreacted monomer The present invention provides a method of separating unreacted monomer from a polymerization process effluent stream. The polymerization process effluent stream has at least the following components: unreacted monomer, polymer, and solid fines. The method comprises... | 08/29/2006 |
| 7094846 | Stirred tube reactor and method of using the same A method of continuous polymerization using differential radial stirring is provided. Particularly suited for this method is a stirred tube reactor with a plurality of collinear stirring shafts that may rotate independently. ... | 08/22/2006 |
| 7074364 | Device and method for carrying out experiments in parallel Modular device and method for carrying out experiments in parallel on process substances to develop technical methods, comprising at least a multiplicity of individual reactors which are controllable independently of one another said reactors being comprised of pres... | 07/11/2006 |
| 7057007 | Process for continuously producing polybutylene terephthalate Polybutylene terephthalate having good heat stability and excellent hydrolysis resistance is continuously produced in a series of a first reactor for reacting an aromatic dicarboxylic acid comprising terephthalic acid as a main ingredient or a derivative thereof wit... | 06/06/2006 |
| 7033545 | Slurry polymerization reactor having large length/diameter ratio A polymerization loop reactor including a loop reaction zone, a continuous takeoff, and a fluid slurry disposed in the reaction zone. A generally cylindrical wall defines the loop reaction zone. The length of the loop reaction zone and the nominal outside diameter o... | 04/25/2006 |
| 7033840 | Reaction calorimeter and differential scanning calorimeter for the high-throughput synthesis, screening and characterization of combinatorial libraries Workstation, apparatuses and methods for the high-throughput synthesis, screening and/or characterization of combinatorial libraries. The invention relates to an array, which permits various high-throughput methods for synthesis, screening and/or characterization in... | 04/25/2006 |
| 7025938 | Fluid recycle apparatus for fluidized bed polyolefin reactor The partially condensed fluid recycle stream of a fluidized bed polyolefin reactor operating in the condensing mode is split into two portions by a stream splitter. In a preferred mode, the smaller stream from the splitter contains a higher ratio of liquid to gas th... | 04/11/2006 |
| 7014821 | Pumping apparatus for slurry polymerization in loop reactors An olefin polymerization process and apparatus wherein a fluid slurry comprising monomer, diluent and catalyst is circulated in a continuous loop reactor by two or more pumps. The process and apparatus allow operating the reaction at significantly higher solids cont... | 03/21/2006 |
| 7015289 | Process and apparatus for reducing take-off valve plugging in a polymerization process A slurry polymerization process removes a portion of the fluid slurry without using a settling leg or a continuous take-off. The process uses a reactor take-off valve that is periodically fully closed and fully opened such that the withdrawn slurry is removed from t... | 03/21/2006 |
| 7005485 | Process for producing polyolefins A process is provided that produces polyolefins. The process comprises mixing a first stream, which comprises at least one catalyst deactivating agent, with a second stream, which comprises at least one polyolefin, at least one catalyst, at least one diluent, and at... | 02/28/2006 |
| 6977235 | Catalyst systems comprising a calcined chromium catalyst and a non-transition metal cyclopentadienyl cocatalyst According to an embodiment, catalyst systems for polymerizing olefins include a catalyst comprising chromium and a cocatalyst comprising a substituted or unsubstituted non-transition metal cyclopentadienyl compound (Cp). The catalyst also comprises an inorganic oxid... | 12/20/2005 |
