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1. (WO2015081119) PROCESS AND APPARATUS TO DETERMINE THE DEGREE OF SEPARATION OF TWO SOLUTION STREAMS

Pub. No.:    WO/2015/081119    International Application No.:    PCT/US2014/067461
Publication Date: Fri Jun 05 01:59:59 CEST 2015 International Filing Date: Wed Nov 26 00:59:59 CET 2014
IPC: C08F 2/01
C08F 6/06
C08F 6/10
B01J 8/00
Applicants: DOW GLOBAL TECHNOLOGIES LLC
Inventors: WANG, Alec Y.
HYPOLITE, Curvel
RUBALCABA, Jorge
ZOGG, Michael J., Jr.
GUZMAN, Job D.
Title: PROCESS AND APPARATUS TO DETERMINE THE DEGREE OF SEPARATION OF TWO SOLUTION STREAMS
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).