METHOD OF DEASHING FROM POLYMER SOLUTIONS

WIPO Patent Application WO/2007/117098

A1

Disclosed is a method of removing a residual catalyst metal compound from a polymer solution. The method comprises the steps of: a) mixing a solution in which at least one organic nitrogen compound is dissolved in a polar solvent and the polymer solution to precipitate a chelate compound of the organic nitrogen compounds and the residual catalyst metal compound, b) adding the polar solvent to the solution mixture to dissolve a chelate compound and to precipitate a polymer, and c) filtering the precipitated polymer. After the polymer polymerization is completed, an organic nitrogen compound solution is added to perform a chelate reaction with the residual catalyst metal compound in a solution phase, and the polar solvent is added to precipitate the polymer so that only polymer precipitates are filtered while an additional filtration process in respect to the chelate compound is not performed to easily remove the residual catalyst metal compound. Thereby, it is possible to produce products that are of good quality.

JUNG HYE-YOUNG (KR)
CHUN SUNG-HO (KR)
HONG SUNG-DON (KR)
LEE JUNG-MIN (KR)
KIM HEON (KR)
KRAVCHUK DMITRY (KR)

PCT/KR2007/001693

October 18, 2007

April 06, 2007

Click for automatic bibliography generation  

LG CHEMICAL LTD (KR)
JUNG HYE-YOUNG (KR)
CHUN SUNG-HO (KR)
HONG SUNG-DON (KR)
LEE JUNG-MIN (KR)
KIM HEON (KR)
KRAVCHUK DMITRY (KR)

C08F6/08; C08F6/06; C08J3/00

KR20020057426A	2002-07-11
KR20040080467A	2004-09-20
US6894145B2	2005-05-17
EP0914482A1	1999-05-12
EP0860451A1	1998-08-26

HAN YANG PATENT FIRM (Yeoksam-dong, Gangnam-gu, Seoul 135-914, KR)

View/Download PDF      PDF Help

Previous Patent: SYSTEM FOR ALTERNATIVE FUEL WITH HIGH EFFICIENCY OF LOOP REACTOR AND METHOD THEREOF

Next Patent: HYDRAULIC PRESSURE TRANSFORMERS