公开(公告)号：US11002653B2

公开(公告)日：2021-05-11

申请号：US16447605

申请日：2019-06-20

Applicant: Dow Global Technologies LLC

Inventor： Alec Y. Wang ,  Curvel Hypolite ,  Jorge Rubalcaba ,  Michael J. Zogg, Jr. ,  Job D. Guzman

IPC: G01N9/32 ,  C08F6/00 ,  C08F6/12

Abstract: The invention provides a method, and apparatus, for determining the degree of separation (DOS) of a polymer solution into a polymer-rich stream and a solvent-rich stream, said method comprising the following: adding to a liquid-liquid separation vessel the polymer solution, which comprises a polymer, a solvent and an anti-solvent; separating the polymer solution into a polymer-rich stream and a solvent-rich stream; removing at least some the polymer-rich stream from at least one outlet P on the vessel, and measuring the actual solution density of this polymer-rich stream using at least one flow meter; removing at least some of the solvent-rich stream from at least one other outlet S on the vessel, and measuring the actual density of the solvent-rich stream using at least one flow meter; and wherein the degree of separation (DOS) is determined by the following equation (Eqn. 1): DOS=[actual solution density (polymer-rich steam)−actual solution density (solvent-rich stream)]/[theoretical solution density (polymer-rich stream)−theoretical solution density (solvent-rich stream)]  (Eqn. 1).

公开(公告)号：US10167383B2

公开(公告)日：2019-01-01

申请号：US15525553

申请日：2015-12-18

Applicant: Dow Global Technologies LLC

Inventor： Thomas W. Karjala ,  Jorge Rubalcaba ,  Edward O. Madenjian ,  Curvel Hypolite ,  Pradeep Jain

IPC: C08L23/08 ,  B01J19/18 ,  B01J19/24

Abstract: The invention provides a process to form a “first composition comprising a first ethylene/α-olefin interpolymer and a second ethylene/α-olefin interpolymer,” said process comprising polymerizing a first mixture comprising ethylene, an α-olefin, and optionally a polyene, in a stirred tank reactor to form a first ethylene/α-olefin interpolymer, and transferring at least some of the first ethylene/α-olefin interpolymer to a loop reactor, and polymerizing, therein, a second mixture comprising ethylene, an alpha-olefin, and optionally a polyene, in the presence of the first ethylene/α-olefin interpolymer, to form the “first composition comprising the first ethylene/α-olefin interpolymer and the second ethylene/α-olefin interpolymer.” The invention also provides a polymerization reactor configuration comprising at least the following: a stirred tank reactor followed by a loop reactor.

公开(公告)号：US20170313800A1

公开(公告)日：2017-11-02

申请号：US15521843

申请日：2015-12-18

Applicant: Dow Global Technologies LLC

Inventor： Thomas W. Karjala ,  Jorge Rubalcaba ,  Edward O. Madenjian ,  Curvel Hypolite ,  Pradeep Jain

IPC: C08F210/18 ,  B01J19/24 ,  B01J19/18

CPC classification number: C08F210/18 ,  B01J19/18 ,  B01J19/2455 ,  C08F2/01 ,  C08F2/04 ,  C08F6/00 ,  C08F6/003 ,  C08F10/02 ,  C08J11/02 ,  C08L23/16 ,  C08L23/04 ,  C08L91/00

Abstract: The invention provides a process to form a composition comprising at least one ethylene-based polymer and at least one oil, said process comprising the following: polymerizing a mixture comprising ethylene, and optionally one or more comonomers, in a reactor system, comprising at least one reactor and at least one mixer, located downstream from the reactor, to form the ethylene-based polymer; and wherein the oil is added to the ethylene-based polymer upstream of the mixer. The invention also provides a reactor system for a process to form a composition comprising at least one ethylene-based polymer and at least one oil, said reactor system comprising at least one reactor, at least one mixer, and an oil feed into the ethylene-based polymer, and wherein the oil feed is located after the reactor and before the mixer.