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| Number | Title | Issue Date |
| 8153757 | Solution polymerization process for preparing polyolefins A solution process for polymerizing one or more α-olefins of formula CH2═CHR, where R is H or an alkyl radical C1-12, to produce a polyolefin soluble in the reaction medium, the process comprising: a) polymerizing said one or more α-... | 04/10/2012 |
| 7964699 | Polymer stream transfer Process for heating a polymer-containing stream being transferred from a polymerization reactor to a degassing vessel operating at a pressure between 6 bara and 12 bara. The process includes passing the stream through a heater having a transfer line for the stream a... | 06/21/2011 |
| 7956157 | Processes using dividing wall distillation column A method for the separation of hydrocarbon compounds utilizing a dividing wall distillation column is described. The dividing wall distillation column enables one or more side draw stream to be removed from the dividing wall distillation column in addition to an ove... | 06/07/2011 |
| 7943727 | Polymer stream transfer Process for heating a polymer-containing stream being transferred from a polymerization reactor to a degassing vessel operating at a pressure between 6 bara and 12 bara. The process includes passing the stream through a heater comprising a transfer line for the stre... | 05/17/2011 |
| 7910689 | Method and apparatus for separation of polymer from a slurry Provided for separating polymer from a slurry comprising polymer and unreacted carrier fluid is (a) a method comprising supplying slurry to a first heating means to increase the temperature of the slurry, using a first separator means to extract a portion of unreact... | 03/22/2011 |
| 7759457 | Polymerisation process A process for the polymerisation of olefins is disclosed wherein at least part of a stream, preferably a catalytically active stream, withdrawn from a polymerisation reactor is passed through a fractionator so as to remove hydrogen and active fines. ... | 07/20/2010 |
| 7745568 | Transfer vessel between flash tank and purge column A process is provided for recovering polymer solids from a polymerisation reactor effluent. The process comprises extracting the polymerisation effluent from a polymerisation reactor; passing the effluent, or a part thereof, to a flash vessel for flashing liquid in ... | 06/29/2010 |
| 7741430 | Polymerisation process A process for the polymerisation of olefins is disclosed wherein at least part of a stream, preferably a catalytically active stream, withdrawn from a polymerisation reactor is passed through a fractionator so as to remove hydrogen and active fines. ... | 06/22/2010 |
| 7655750 | Process for the continuous preparation and isolation of soluble preceramic oligomers and/or polymers The invention relates to a method for continuously producing pre-ceramic polymers. The inventive method consists in synthesizing polymers, in separating polymers from a reaction mixture and in thermally conditioning for defining a cross linkage degree and rheologica... | 02/02/2010 |
| 7582724 | Recovering ethylene and vinyl acetate from the residual gas stream of vinyl ester-ethylene copolymer preparation In a process for the preparation of copolymers containing vinyl esters and ethylene or ethylenically unsaturated monomers by aqueous, free radical polymerization at a pressure of from 5 to 100 bar absolute by the emulsion or suspension polymerization method, after t... | 09/01/2009 |
| 7517947 | Polymer transfer within a polymerization system A method for transferring polymer within a polymerization system, comprising continuously withdrawing the polymer from the reactor and conveying the polymer from a reactor to a flash chamber via a pressure differential between the reactor and the flash chamber. A me... | 04/14/2009 |
| 7420027 | Method for producing a borohydride A method for producing a borohydride is described and which includes the steps of providing a source of borate; providing a material which chemically reduces the source of the borate to produce a borohydride; and reacting the source of borate and the material by sup... | 09/02/2008 |
| 7371510 | Material for forming resist protecting film for use in liquid immersion lithography process, composite film, and method for forming resist pattern Provided are a material for forming a resist protecting film which is for use in a liquid immersion lithography process and which is formed on a resist film, wherein the material has the following properties of: being transparent with respect to exposure light; havi... | 05/13/2008 |
| 7351779 | Polymerization process and reactor system A process for polymerizing one or more monomers is provided. In at least one specific embodiment, the process includes preparing a mixture comprising the one or more monomers, a catalyst system and a fluorinated hydrocarbon, preferably a hydrofluorocarbon. A fluorin... | 04/01/2008 |
| 7345132 | Method of producing novolak resin Provided an industrially excellent method of producing a phenol novolak resin having an ortho ratio of 30% or more by: (1) a method of reacting a phenol and an aldehyde using an oxalic acid catalyst at 110 to 160° C. under pressure; or (2) a method of reacting a ph... | 03/18/2008 |
| 7342079 | Polymerization process and reactor system This invention is directed to processes for making polymer in the presence of a hydrofluorocarbon, and for the recovery of polymer substantially free of dissolved hydrocarbons and hydrofluorocarbons. The processes provided enables polymerization processes to be prac... | 03/11/2008 |
| 7335721 | Polytetrafluoroethylene treatment One or more PTFE films are heated to greater than 150 degrees centigrade (C) and for a time greater than 20 hours, then the PTFE films are cooled. The PTFE films may be heated to temperatures greater than 200° C. and less than 250° C. and most preferably heated to... | 02/26/2008 |
| 7332058 | Heat exchanger and process for devolatilizing polymers using same Disclosed is a process for devolatilizing a polymer including passing the polymer through a devolatizer including a plate heat exchanger wherein the plates of the plate heat exchanger are heated by a plurality of heating tubes and wherein the heating tube including ... | 02/19/2008 |
| 7304123 | Processes for shaping macrocyclic oligoesters In one aspect, the invention relates to processes for producing substantially free-flowing shapes of macrocyclic oligoester, wherein the freshly-shaped macrocyclic oligoester is maintained at elevated temperature for a sufficient time. In certain embodiments, the sh... | 12/04/2007 |
| 7301055 | Process for removing methanol from formaldehyde-containing solutions Process for removing methanol from formaldehyde-containing solutions. The present invention relates to a process for removing methanol from formaldehyde-containing solutions, with methanol being converted into formaldehyde dimethyl acetal by reactive distillation in... | 11/27/2007 |
| 7296576 | Polymers for enhanced solubility of nanomaterials, compositions and methods therefor Poly(aryleneethynylene) polymers, poly(ferrocenylaryleneethynylene) polymers and poly(ferrocenylethynylene) polymers having properties particularly useful for solubilizing nanomaterials and for effecting subsequent re-solubilization of a solid polymer-solubilized na... | 11/20/2007 |
| 7282554 | Low molecular weight polyphenylene ether A low molecular weight polyphenylene ether having a reduced viscosity of 0.04 to 0.18 dl/g as measured at 30° C. in a 0.5 g/dl chloroform solution, and a molecular weight distribution of 1.5 to 2.5; or a low molecular weight polyphenylene ether powder comprising th... | 10/16/2007 |
| 7279028 | Electrostatic filter An electrostatic filter having an improved dielectric is described. The dielectric constitutes a dielectric mat formed from high porosity non-woven fibers having pores that have a void fraction of at least 97%. The dielectric mat is sandwiched by a pair of porous el... | 10/09/2007 |
| 7273531 | Method of modifying a fluoropolymeric substrate and composite articles thereby Fluoropolymeric substrates are modified by a photochemical process that includes at least one species having the formula wherein: R represents hydrogen or an alkyl or cycloalkyl group having from 1 to 18 carbon a... | 09/25/2007 |
| 7268206 | Process and apparatus for degassing a polymer The present invention relates to a process for stripping residual volatile compounds contained in a thermoplastic polymer. The process comprises (1) forming the polymer in the form of a melt flowing as a main stream, (2) forming a foaming agent in the form of one or... | 09/11/2007 |
| 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 |
| 7256225 | Methods of preparing a polymeric material A method is disclosed to prepare a polymeric material by filtering solutions of poly(arylene ether) and/or poly(alkenyl aromatic) through one or more filtration systems to provide a material having reduced levels of particulate impurities. The polymeric material pre... | 08/14/2007 |
| 7255728 | Apparatus and method for degassing liquids Apparatus and method for degassing liquids particularly cationic monomers. Fluid comprising liquid to be degassed together with sweep gas is admitted tangentially into a column (10) and forced down the column by a tubular baffle (16) which defines, wit... | 08/14/2007 |
| 7250486 | Method and apparatus for crystallizing polymer particles The present invention is a process and apparatus for conserving loss of heat while forming and crystallizing polymer particles in a liquid. The cooling liquid quenches the polymer during particle molding to facilitate shaping. The cooling liquid cools the polymer pa... | 07/31/2007 |
| 7241859 | Process for treating a polyolefin discharged from an olefin polymerization reactor Process for treating polyolefin discharged from an olefin polymerization reactor which comprises steps of discharging from a polymerisation reactor a slurry comprising polyolefin and diluent; submitting said slurry to a pressure release such that the diluent is evap... | 07/10/2007 |
| 7238773 | Countercurrent stripping pipe Countercurrent stripping pipe for removing volatile organic constituents from reaction products, having a column pipe (201) composed of a plurality of pipe sections (201a-d), in which trays (202) are arranged, connections (205, ... | 07/03/2007 |
| 7226989 | Method of separating a polymer from a solvent A method of separating a polymer-solvent mixture is described wherein a polymer-solvent mixture is heated prior to its introduction into an extruder comprising an upstream vent and/or a side feeder vent to allow flash evaporation of the solvent, and downstream vents... | 06/05/2007 |
| 7226282 | Charge roller of developing device for image forming apparatus, method for fabricating the same and tool for fabricating charge roller A method of manufacturing a charge roller utilizes a foam rubber substance where epichlorohydrin oxide rubber and an acrylonitrile butadiene rubber are mixed at a ratio of 5:95, or utilizing a crosslinking rubber substance consisting of epichlorohydrin oxide rubber ... | 06/05/2007 |
| 7223890 | Isocyanate reactive mixture and process for preparing same The present invention relates to an improved isocyanate reactive mixture containing at least one DMC-catalyzed polyol and about 0.25 to about 15 wt. %, based on the total weight of the isocyanate-reactive mixture, of at least one ethylene oxide (EO) containing water... | 05/29/2007 |
| 7223800 | Method for producing regenerated fluororesin and regenerated fluororesin article A method for producing a regenerated fluororesin, characterized in that it comprises subjecting a used melt-molded fluororesin article to a heat treatment at a temperature of from room temperature to the melting point of the resin; a method for producing a regenerat... | 05/29/2007 |
| 7217783 | Oxytetramethylene glycol copolymer and process for producing the same An oxytetramethylene glycol copolymer obtained by copolymerizing tetrahydrofuran and neopentyl glycol which has a specific number average molecular weight Mn, a specific molecular weight distribution Mw/Mn, a specific neopentyl glycol copolymerization whole ratio N | 05/15/2007 |
| 7183372 | Preparation of ketone-formaldehyde resins A process for preparing ketone-formaldehyde resins, especially acetophenone- and cyclohexanone-formaldehyde resins, having a low water content and high thermal stability and yellowing resistance, and a process for their production and their use. ... | 02/27/2007 |
| 7169857 | Homogenous compositions of fluoropolymers and crystalline solids or cross-linking agents and methods of making the same Fluoroelastomers are combined with chemical agents in the presence of supercritical carbon dioxide by swelling the fluoroelastomer with the carbon dioxide, and impregnating the swollen fluorelastomer with the chemical agent. The process can be conducted at relativel... | 01/30/2007 |
| 7157518 | Method for preparing an organo-silicon sol and materials obtained from such a sol The method consists in hydrolysing an initial volume Vse of a precursor material comprising at least one polyalkoxysilane with a quantity of water such that x ... | 01/02/2007 |
| 7153929 | Copolymers, devoid of rubber, with low residual monomer content and a method and device for producing the same Rubber-free copolymers of unsaturated monomers selected from the group comprising styrenes and vinyl cyanides are disclosed. The copolymers that contain 65 to 80 wt. %, of styrene and 20 to 35 wt. % of acrylonitrile are characterized in their low content of residual... | 12/26/2006 |
