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Basell Polyolefine Gmbh patents


Recent patent applications related to Basell Polyolefine Gmbh. Basell Polyolefine Gmbh is listed as an Agent/Assignee. Note: Basell Polyolefine Gmbh may have other listings under different names/spellings. We're not affiliated with Basell Polyolefine Gmbh, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "B" | Basell Polyolefine Gmbh-related inventors


Method for cleaning a metal surface of a metal component of an industrial plant

. . A method for cleaning a metal surface of a metal component of an industrial plant is disclosed comprising measuring the electrical resistance ra1 of a metal component over a cleaned area of the metal surface with a resistance meter, comparing the electrical resistance ra1 measured with a pre-determined electrical resistance value rdet, assessing whether ra1 is greater, smaller or equal to rdet, and repeating cleaning if the electrical resistance ra1 measured is greater than rdet, or terminating cleaning of the surface area of the metal component if ra1 is smaller than or identical to rdet.. . ... Basell Polyolefine Gmbh

Methods for testing non- or weakly ferromagnetic test objects

Methods of detecting carburization, nitriding or chromium depletion in a non- or weakly ferromagnetic test object using a permanent magnet having a magnet pull force equal to or greater than about 75n and measuring either the adhesive force to detach the magnet from the test object or the attractive force in which the magnet is being pulled towards the surface of the test object.. . ... Basell Polyolefine Gmbh

Process for start-up of a multizone circulating reactor

. . A process for starting a multizone circulating reactor containing no polyolefin particles, comprising the steps of conveying gas through the reactor and the gas recycle line, feeding a particulate material comprising a polymerization catalyst and optionally polyolefin into the reactor, controlling the gas flow in a vertical reactor zone equipped with a throttling valve at the bottom so that the upwards gas velocity in the bottom part of this reaction zone is lower than the terminal free-fall velocity of the particulate material fed into the reactor, and, after the weight of the particulate polyolefin in this reactor zone is higher than the drag force of the upward moving gas, controlling the circulation rate of the polymer particles within the multizone circulating reactor by adjusting the opening of the throttling valve and adjusting the flow rate of a dosing gas.. . ... Basell Polyolefine Gmbh

Continuous gas-phase polymerization processes

. . The present disclosure relates to a continuous process for the preparation of ethylene homopolymers or ethylene copolymers comprising polymerizing ethylene or copolymerizing ethylene and one or more other olefins in the presence of a chromium catalyst in a gas-phase polymerization reactor which is equipped with a cycle gas line for withdrawing reactor gas from the reactor, leading the reactor gas through a heat-exchanger for cooling and feeding the reactor gas back to the reactor, wherein the polymerization is carried out at a temperature from 30° c. To 130° c. ... Basell Polyolefine Gmbh

Polymerization process in the presence of antistatic agent

A process for preparing a polyolefin, including polymerizing olefins in the presence of an antistatic agent made from or containing an alkylene oxide derived polymer made from or containing in average from about 10 to about 200 repeating units —(ch2—chr—o)— with r being hydrogen or an alkyl group having from 1 to 6 carbon atoms, wherein the alkylene oxide derived polymer is a random copolymer of ethylene oxide and other alkylene oxides and a ratio of n:m is in the range of from 6:1 to 1:1, wherein (n) is the average number of repeating units —(ch2—ch2—o)— derived from ethylene oxide and (m) is the average number of repeating units —(ch2—chr′—o)— derived from the other alkylene oxides with r′ being an alkyl group having from 1 to 6 carbon atoms, and the end groups of the alkylene oxide derived polymer are —oh groups.. . ... Basell Polyolefine Gmbh

High-pressure polymerization process of ethylenically unsaturated monomers

A process for polymerizing or copolymerizing ethylenically unsaturated monomers in the presence of free-radical polymerization initiators, wherein the polymerization is carried out at temperatures from 100° c. To 350° c. ... Basell Polyolefine Gmbh

Multi-reactor slurry polymerization processes with high ethylene purity

A slurry polymerization process for the preparation of polyethylene in a reactor cascade of two or more polymerization reactors including the steps of feeding to a polymerization reactor amounts of ethylene, of a ziegler catalyst, of fresh aluminum alkyl and of a diluent; feeding the slurry product withdrawn from the polymerization reactor to a second polymerization reactor; and feeding additional amounts of ethylene and of diluent wherein the ethylene is first passed through an ethylene purification unit, which reduces at least the concentration of carbon monoxide, carbon dioxide, oxygen, acetylene and water contained in the ethylene, before it is fed to the two or more polymerization reactors of the reactor cascade.. . ... Basell Polyolefine Gmbh

Polymerization process in the presence of an antistatic composition

A process for the preparation of polyolefins by polymerizing olefins at temperatures of from 20 to 200° c. And pressures of from 0.1 to 20 mpa in the presence of a polymerization catalyst and an antistatically acting composition in a polymerization reactor, wherein the antistatically acting composition is a mixture comprising an oil-soluble surfactant and water and the use of an antistatically acting composition comprising an oil-soluble surfactant and water as antistatic agent for the polymerization of olefins at temperatures of from 20 to 200° c. ... Basell Polyolefine Gmbh

Process for separating components of a polymer-monomer mixture obtained by high-pressure polymerization of ethylenically unsaturated monomers

. . A process for separating polymeric and gaseous components of a polymer-monomer mixture at a pressure of from 0.12 mpa to 0.6 mpa and a temperature of from 120° c. To 300° c. ... Basell Polyolefine Gmbh

Process for preparing a polyolefin composition

A process for continuously preparing a polyolefin composition made from or containing a polyolefin and carbon black in an extruder device. The process includes the steps of supplying polyolefin in form of a polyolefin powder and carbon black to a mixing device; alternatively, (a) measuring the flow rate of the polyolefin powder supplied to the mixing device or (b) measuring the flow rate of the polyolefin pellets prepared in the extruder device; adjusting the flow rate of the carbon black to the mixing device in response to the measured flow rate of the polyolefin powder or adjusting the flow rate of the polyolefin powder to the mixing device in response to the measured flow rate of the polyolefin pellets; melting and homogenizing the mixture within the extruder device; and pelletizing the polyolefin composition into the polyolefin pellets.. ... Basell Polyolefine Gmbh

High-pressure polymerization process of ethylenically unsaturated monomers in a tubular reactor

. . The present technology relates to a process for polymerizing or copolymerizing ethylenically unsaturated monomers in the presence of free-radical polymerization initiators, wherein the polymerization is carried out in a continuously operated tubular reactor at temperatures from 100° c. To 350° c. ... Basell Polyolefine Gmbh

Process for preparing a polyolefin composition

. . A process for continuously preparing a polyolefin composition made from or containing a bimodal or multimodal polyolefin and one or more additives in an extruder device equipped with at least one hopper. The process includes the steps of supplying a bimodal or multimodal polyolefin in form of a polyolefin powder to the hopper; (a) measuring the flow rate of the polyolefin powder or (b) measuring the flow rate of the prepared polyolefin pellets; supplying one or more additives to the hopper; adjusting the flow rates of the additives supplied to the hopper in response to the measured flow rate of the polyolefin powder or adjusting the flow rate of the polyolefin powder in response to the measured flow rate of the polyolefin pellets; melting and homogenizing the polyolefin powder and additives within the extruder device; and pelletizing the molten polyolefin composition into the polyolefin pellets.. ... Basell Polyolefine Gmbh

Process for ethylene polymerization with improved ethylene feed system

The present disclosure relates to a process for the preparation of polyethylene by polymerizing in a slurry ethylene and optionally one or more c3 to c10 alpha-olefins. In some embodiments, the polymerization is carried out in a cylindrical polymerization reactor equipped with an agitator for mixing the contents of the reactor and inducing a flow of the slurry, the ethylene is fed into the reactor by an ethylene injection system comprising one or more injection nozzles which project through the bottom reactor head or through the reactor wall and extend from 0.02-0.5 times the inner diameter d into the reactor, and the ethylene exits the injection nozzle with an exit velocity from 10-200 m/s.. ... Basell Polyolefine Gmbh

Low density polyethylene with high elongation hardening

The present disclosure provides a low density polyethylene (ldpe) having (a) a density from 0.910 to 0.924 g/cm3, determined according to iso 1183 at 23° c.; (b) an elongational hardening of at least 4.2, at 150° c. At an elongational rate of 1 s−1; (c) a ratio mw/mn of at least 18, where (i) mw is the weight average molar mass, measured by a malls detector coupled to a gpc, and (ii) mn is the number average molar mass, measured by gpc (gel permeation chromatography); and (d) a mw of at least 230,000 g/mol. ... Basell Polyolefine Gmbh

07/27/17 / #20170210833

Process for controlling an ethylene polymerization process

A method for controlling a slurry polymerization for the preparation of polyethylene, where the polyethylene is formed in a polymerization reactor comprising a vapor section by contacting a ziegler-type catalyst, ethylene, and either hydrogen or, as comonomer(s), one or more c3 to c10 alpha-olefins or hydrogen and one or more c3 to c10 alpha-olefins, wherein the ethylene partial pressure is maintained by adjusting the flow rate of the catalyst to the polymerization reactor and the hydrogen/ethylene and comonomer/ethylene partial pressure ratios are maintained by adjusting the flow rates of hydrogen and/or of the one or more comonomers to the polymerization reactor.. . ... Basell Polyolefine Gmbh

07/20/17 / #20170204206

Ethylene polymerization process having improved heat exchanger performance

A process for the preparation of polyethylene by polymerizing in a slurry ethylene and optionally one or more c3 to c10 alpha-olefins in a reactor system comprising a polymerization reactor and one or more first heat exchangers located outside the polymerization reactor where the slurry in the polymerization reactor is cooled by withdrawing slurry from the polymerization reactor, cooling the slurry in the one or more first heat exchangers and returning the cooled slurry to the polymerization reactor, wherein the one or more first heat exchangers are cooled by a first coolant having a temperature of 29° c. Or higher.. ... Basell Polyolefine Gmbh

06/29/17 / #20170183429

High-pressure polymerization process of ethylenically unsaturated monomers in a tubular reactor

. . . . The present technology relates to a process for polymerizing or copolymerizing ethylenically unsaturated monomers in the presence of free-radical polymerization initiators, wherein the polymerization is carried out in a continuously operated tubular reactor at temperatures from 100° c. To 350° c. ... Basell Polyolefine Gmbh

06/29/17 / #20170183427

Methods for controlling aluminum alkyl feed to a slurry polymerization process

The present disclosure generally relates to a slurry polymerization process for the preparation of polyethylene in the presence of a ziegler catalyst and aluminum alkyl co-catalyst in at least one polymerization reactor, in which process suspension medium comprising a concentration of aluminum alkyl co-catalyst is recycled to the polymerization, the concentration of aluminum alkyl co-catalyst in the recycled suspension medium is determined; and the amount of fresh aluminum alkyl co-catalyst fed to the polymerization is adjusted to maintain a targeted aluminum alkyl co-catalyst concentration in the recycled suspension medium.. . ... Basell Polyolefine Gmbh

03/16/17 / #20170073440

Process for ethylene polymerization with improved slurry pump performance

. . A slurry polymerization process comprising polymerizing monomers in a reactor comprising baffles, a first slurry feed line for returning cooled slurry from a cooler and optionally a second slurry feed line for transferring reactor slurry from a previous reactor of a cascade of polymerization reactors, wherein the baffle top, the first slurry feed line discharge end and the second slurry feed line end are located below the reactor liquid level.. . ... Basell Polyolefine Gmbh

01/26/17 / #20170022303

High-pressure polymerization process of ethylenically unsaturated monomers in a tubular reactor

The present technology relates to a process for polymerizing or copolymerizing ethylenically unsaturated monomers in the presence of free-radical polymerization initiators, wherein the polymerization is carried out in a continuously operated tubular reactor at temperatures from 100° c. To 350° c. ... Basell Polyolefine Gmbh








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