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1
EP2265367B1
Publication/Patent Number: EP2265367B1
Publication date: 2019-02-20
Application number: 09733227.4
Filing date: 2009-04-15
2
EP3447076A2
Publication/Patent Number: EP3447076A2
Publication date: 2019-02-27
Application number: 17872684.0
Filing date: 2017-10-19
Assignee: LG Chem, Ltd.
Abstract: The present invention relates to an olefinic monomer recovery device capable of suppressing fouling and pressure drop in the recovery device in a process of separating and recovering unreacted monomers after production of a polyolefin resin. The olefinic monomer recovery device is used for separating and recovering unreacted olefinic monomers after production of a polyolefin resin, the apparatus comprising a vertical-type heat exchange unit, and a knock-out drum unit, wherein the vertical-type heat exchange unit includes: a heat exchange unit body in which a cooling medium for heat exchange is accommodated; and a plurality of heat transfer tubes which extend in a vertical direction and are installed in the heat exchange unit body so as to be submerged in the cooling medium and through which a gas containing an olefinic monomer and a polyolefin wax passes, and wherein the knock-out drum unit includes: a gas inlet directly connected to the heat transfer tubes of the vertical-type heat exchange unit; a knock-out separating means for separating an olefinic monomer-containing gas and a polyolefin wax-containing liquid from the gas; a first discharge tube, installed at an upper portion of the knock-out drum unit, for discharging the olefinic monomer-containing gas; and a second discharge tube, installed at a lower portion of the knock-out drum unit, for discharging the polyolefin wax-containing liquid. The present invention relates to an olefinic monomer recovery device capable of suppressing fouling and pressure drop in the recovery device in a process of separating and recovering unreacted monomers after production of a polyolefin resin. The olefinic monomer recovery device ...more ...less
3
US10184014B2
Publication/Patent Number: US10184014B2
Publication date: 2019-01-22
Application number: 15/313,572
Filing date: 2015-04-29
Abstract: A process for increasing purity of a low density polyethylene (LDPE) composition, comprising the steps of: a) providing a melted composition comprising LDPE having Mn of at least 5.0 kg/mol according to size exclusion chromatography, Mw of at least 50 kg/mol according to size exclusion chromatography, a density of 915 to 935 kg/m3 according to ISO1183 and a melt flow rate of 0.10 g/10 min to 80 g/10 min according to ISO1133:2011 measured at 190° C. and 2.16 kg, and b) providing particles from the melted composition by: b1) mixing a supercritical fluid in the melted composition to obtain a solution saturated with the supercritical fluid and b2) expanding the solution through an opening to obtain the particles. A process for increasing purity of a low density polyethylene (LDPE) composition, comprising the steps of: a) providing a melted composition comprising LDPE having Mn of at least 5.0 kg/mol according to size exclusion chromatography, Mw of at least 50 kg/mol according to size ...more ...less
4
EP2995323B1
Publication/Patent Number: EP2995323B1
Publication date: 2019-02-27
Application number: 14184703.8
Filing date: 2014-09-15
Abstract: Die Herstellung wasserabsorbierender Polymerpartikel durch Polymerisation einer Monomerlösung oder -suspension, die a) mindestens ein ethylenisch ungesättigtes, säuregruppentragendes Monomer, das wahlweise zumindest teilweise als Salz vorliegt, b) mindestens einen Vernetzer und c) mindestens einen Initiator enthält, wobei das Verfahren weiterhin Trocknung des erhaltenen Polymerisats sowie wahlweise Mahlung des getrockneten Polymerisats und Siebung des gemahlenen Polymerisats sowie wahlweise Oberflächennachvernetzung des getrockneten und gegebenenfalls gemahlenen und gesiebten Polymerisats umfasst, und wobei die Polymerisation in Gegenwart von Aminopolycarboxylsäuren und/oder deren Salzen, insbesondere von Ethylendiamindibernsteinsäure und/oder einem Salz davon erfolgt, wird beschrieben. Die Herstellung wasserabsorbierender Polymerpartikel durch Polymerisation einer Monomerlösung oder -suspension, die a) mindestens ein ethylenisch ungesättigtes, säuregruppentragendes Monomer, das wahlweise zumindest teilweise als Salz vorliegt, b) mindestens einen Vernetzer un ...more ...less
5
EP2546285B1
Publication/Patent Number: EP2546285B1
Publication date: 2019-06-12
Application number: 11753511.2
Filing date: 2011-03-14
6
US10286372B2
Publication/Patent Number: US10286372B2
Publication date: 2019-05-14
Application number: 15/309,721
Filing date: 2015-03-10
Abstract: Disclosed are insert assemblies with stacked gas flow gaps to add and/or remove gases from a solid/gas mixture travelling through a barrier. An example system may comprise a barrier and an insert assembly in the barrier defining an annulus between the insert assembly and the barrier, wherein the insert assembly comprises stacked flow gaps configured for addition and/or removal of gas from a solid/gas mixture flowing in the annulus. Disclosed are insert assemblies with stacked gas flow gaps to add and/or remove gases from a solid/gas mixture travelling through a barrier. An example system may comprise a barrier and an insert assembly in the barrier defining an annulus between the insert assembly and the ...more ...less
7
EP2276561B1
Publication/Patent Number: EP2276561B1
Publication date: 2019-06-19
Application number: 09732325.7
Filing date: 2009-04-15
9
EP3023369B1
Publication/Patent Number: EP3023369B1
Publication date: 2019-06-26
Application number: 15003577.2
Filing date: 2009-03-26
10
EP2185606B2
Publication/Patent Number: EP2185606B2
Publication date: 2019-06-12
Application number: 08803367.5
Filing date: 2008-08-29
11
US20190085101A1
Publication/Patent Number: US20190085101A1
Publication date: 2019-03-21
Application number: 15/743,491
Filing date: 2017-08-23
Assignee: LG Chem, Ltd.
Abstract: The present invention relates to a method for recovering ethylene and a vinyl-comonomer that is capable of improving the rate of recovery of unreacted monomers remaining after polymerization of ethylene and a vinyl-based comonomer and increasing process efficiency through the reduction of costs. Specifically, the method for recovering ethylene and a vinyl-comonomer includes: a step of polymerizing ethylene and a vinyl-based comonomer at a pressure of 1500 bar or more; a step of depressurizing the product obtained in the polymerization step including an ethylene-vinyl-based comonomer polymer, ethylene, and a vinyl-based comonomer to 0.1 bar to 5 bar; a step of adding ethylene to the product obtained in the polymerization step under the pressure of 0.1 bar to 5 bar; and a step of separating ethylene and a vinyl-based comonomer from the product obtained in the polymerization step to which the ethylene is added. The present invention relates to a method for recovering ethylene and a vinyl-comonomer that is capable of improving the rate of recovery of unreacted monomers remaining after polymerization of ethylene and a vinyl-based comonomer and increasing process efficiency through the ...more ...less
12
EP3150642B1
Publication/Patent Number: EP3150642B1
Publication date: 2019-04-24
Application number: 15798799.1
Filing date: 2015-05-28
Assignee: LG Chem, Ltd.
14
EP3067370B1
Publication/Patent Number: EP3067370B1
Publication date: 2019-03-27
Application number: 14870573.4
Filing date: 2014-12-05
Assignee: LG Chem, Ltd.
15
US10301404B2
Publication/Patent Number: US10301404B2
Publication date: 2019-05-28
Application number: 15/909,621
Filing date: 2018-03-01
Abstract: The present embodiments provide a system and method for separation within a polymer production process. Specifically, a flashline heater configured according to present embodiments may provide more time than is required for complete vaporization of liquid hydrocarbons that are not entrained within a polymer fluff produced within a polymerization reactor. Such extra time may allow for liquid hydrocarbons that are entrained within the polymer fluff to be vaporized. The present embodiments provide a system and method for separation within a polymer production process. Specifically, a flashline heater configured according to present embodiments may provide more time than is required for complete vaporization of liquid hydrocarbons that are ...more ...less
17
EP3416989B1
Publication/Patent Number: EP3416989B1
Publication date: 2019-06-12
Application number: 17704028.4
Filing date: 2017-02-14
18
US10307506B2
Publication/Patent Number: US10307506B2
Publication date: 2019-06-04
Application number: 13/634,128
Filing date: 2011-03-14
Abstract: The disclosed process for continuously producing a water-absorbing resin comprising a plurality of joined continuous steps; a polymerization step of polymerizing an aqueous unsaturated monomer solution, a drying step of drying a particulated water-containing gel-like crosslinked polymer obtained in a finely crushing step during the polymerization or after the polymerization, a pulverizing step after the drying, a classification step after the drying, and a surface treatment step for the water-absorbing resin powder after the classification step. In the process, with some of the above steps kept running, the other steps are interrupted, and subsequently all the steps are restarted. The disclosed process for continuously producing a water-absorbing resin comprising a plurality of joined continuous steps; a polymerization step of polymerizing an aqueous unsaturated monomer solution, a drying step of drying a particulated water-containing gel-like crosslinked ...more ...less
19
EP2546284B1
Publication/Patent Number: EP2546284B1
Publication date: 2019-07-10
Application number: 11753510.4
Filing date: 2011-03-14
20
EP3147299B1
Publication/Patent Number: EP3147299B1
Publication date: 2019-07-10
Application number: 15796218.4
Filing date: 2015-05-12