Patent application number | Description | Published |
20090099315 | Polyethylene Composition Suitable for the Preparation of Films and Process for Preparing the Same - A polyethylene composition, in particular suitable for the preparation of films, and a process for preparing the same are described. The polyethylene composition of the invention comprises from 50 to 89% by weight of a first polyethylene component comprising at least one multimodal polyethylene including a plurality of ethylene polymer fractions having distinct molecular weights and comonomer contents, at least one of said plurality of ethylene polymer fractions being prepared by the use of a single site catalyst, and from 50 to 11% by weight of a second polyethylene component comprising a low or medium density polyethylene. | 04-16-2009 |
20090105414 | METHOD OF METERING PROCESS ADDITIVES, IN PARTICULAR ANTISTICS, INTO POLYMERIZATION REACTORS - Method for metering polar, antistatically acting process auxiliaries into a polymerization reactor in which the process auxiliaries are present in solution in a nonpolar solvent, wherein the electrical conductivity of the solution is measured and the amount of the process auxiliary metered in is determined from the electrical conductivity. | 04-23-2009 |
20110045295 | ADHESIVE POLYMER COMPOSITION - A novel adhesive composition suitable for composing multilayered coatings onto large, industrial equipment such as pipeline tubes is devised. The composition is a blend based on a polyethylene which determines the blend's favorable properties, which polyethylene itself can be used further in coating cables and for producing mouldings, especially rotomoulded articles. | 02-24-2011 |
20120065335 | Polyethylene composition suitable for the preparation of films and process for preparing the same - A polyethylene composition, in particular suitable for the preparation of films, and a process for preparing the same are described. The polyethylene composition of the invention comprises from 50 to 89% by weight of a first polyethylene component comprising at least one multimodal polyethylene including a plurality of ethylene polymer fractions having distinct molecular weights and comonomer contents, at least one of said plurality of ethylene polymer fractions being prepared by the use of a single site catalyst, and from 50 to 11% by weight of a second polyethylene component comprising a low or medium density polyethylene. | 03-15-2012 |
20120148776 | Polyethylene for Rotomoulding - A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles. | 06-14-2012 |
20120148777 | Polyethylene for Rotomoulding - A novel polyethylene is devised which polyethylene is particularyl advantageous for manufacturing rotomoulded articles. | 06-14-2012 |
20120149834 | Polyethylene for Rotomoulding - A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles. | 06-14-2012 |
20130131300 | PROCESS AND APPARATUS FOR MIXING AND SPLITTING FLUID STREAMS - A process for continuously mixing at least two fluid streams and splitting the stream of the mixture into at least two partial streams, comprising a) providing streams of the at least two fluids via separated conduits; b) combining the streams of the fluids and forming a homogeneous mixture; c) measuring the pressure in the conduit conveying the mixture of the fluids; d) splitting the stream of the mixture of the fluids into at least two partial streams and feeding each of the partial streams to a conduit equipped with a flow control device controlled by a controller; and e) adjusting the flow rates of the partial streams of the mixture of the fluids by feeding the pressure information measured in step c) as process variable to the controllers controlling the flow control devices, a process for feeding a mixture of at least two fluids via at least two feeding points, an apparatuses for carrying out such processes and a process for polymerizing olefins. | 05-23-2013 |
20130245209 | METHOD FOR ACTIVATION OF CHROMIUM CONTAINING CATALYST PRECURSOR FOR POLYMERIZATION AND THE RESULTING POLYMERIZATION CATALYST - Method for activation of chromium containing catalyst precursor for polymerization and improved polymerization catalyst resulting The instant invention relates to an activation of a polymerization catalyst precursor by heat treatment comprising a support material and a catalyst precursor deposited thereon in a fluidized bed activator and to the use of the activated polymerization catalyst in the manufacture of polyolefins. The Method is performed in a cylindrical activator ( | 09-19-2013 |
20130252809 | METHOD FOR ACTIVATION OF CHROMIUM CONTAINING CATALYST PRECURSOR FOR POLYMERIZATION AND THE RESULTING POLYMERIZATION CATALYST - The instant invention relates to an activation of a polymerization catalyst precursor by heat treatment comprising a support material and a catalyst precursor deposited thereon in a fluidized bed activator and to the use of the activated polymerization catalyst in the manufacture of polyolefins. The activation involves heat treatment in the presence of oxygen. After that activation the oxygen in the activator is replaced by inert gas via flushing until the fluidization gas ermerging from the activator comprises oxygen in a maximum amount of up to 5 ppm. The catalyst prepared by that method is improved with respect to prevent reactor fouling during gas-phase polymerization or slurry polymerization either in stirred vessel or loop. | 09-26-2013 |
20140114038 | METHOD AND APPARATUS FOR DISCHARGING A POLYMER FROM A GAS-PHASE REACTOR - Process for discharging polyolefin particles from a gas-phase polymerization reactor of a pressure from 1.0 MPa to 10 MPa to a discharge vessel of a pressure from 0.1 MPa to 1.0 MPa wherein the discharging is carried out discontinuously through at least two discharge lines in which the polyolefin particles are transported horizontally or upwards, process for polymerizing olefins at temperatures of from 30° C. to 160° C. and pressures of from 1.0 MPa to 10 MPa in the presence of a polymerization catalyst in a gas-phase polymerization reactor comprising discharging the obtained polyolefin particles from the gas-phase polymerization reactor by the process for discharging polyolefin particles and apparatus for polymerizing olefins in the gas-phase comprising a polymerization reactor, a discharge vessel and at least two pipes connecting the polymerization reactor and the discharge vessel for discharging polyolefin particles, wherein the discharge lines are constructed in a way that the polyolefin particles conveyed from the polymerization reactor to the discharge vessel are transported horizontally or upwards. | 04-24-2014 |