[12] Patent
[11] Patent No.:GC0004542  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2016                32/2016  
Number of the Decision to Grant the Patent:2016/89726
Date of the Decision to Grant the Patent:19/Dec/2016

[21] Application No.:GC 2010-17370

[22] Filing Date:18/12/2010

[30] Priority:

[33] State [32] Priority date [31] Priority No.
EP
18/12/2009
9179864.5

[72] Inventors:1- Daan DewachterŲŒ2- Martine Slawinski

[73] Owner: Total Petrochemicals Research Feluy, Zone Industrielle C, Seneffe, Feluy, Belgium

[74] Agent: Saud M. A. Shawwaf Law Office

  

 

  

[51]IPC:
Int. Cl.: C08F10/02 (2006.01)

[56] Cited Documents:

-US 2005272891 A1 (FOUARGE LOUIS [BE] ETAL) 8 December 2005
-US 2009143546 A1 (FOUARGE LOUIS [BE] ETAL) 4 June 2009
-NO 9732905 A1 (BOREALIS AS [DK]; ALMQUISTVIDAR [No]; AASTAD TONE [No]; MELAAENINGRI) 12 September 1997
-NO 2004060921 A2 (UNIVATION TECH LLC[US]) 22 Ju1y 2004
-WO 0177190 A1 (BP CHEM INT LTD [GB]; SAMSON JOHN NORMAN REID [GB]) 18 October 2001
 
Examiner: Nouf AlNassban

[54] METHOD FOR REPLACING COMPATIBLE ETHYLENE POLYMERIZATION CATALYSTS
[57] Abstract: The present invention relates to a method for optimizing the sequential feeding of at least two ethylene polymerization catalysts to an ethylene polymerization reactor, comprising:- transferring to a mixing vessel a first ethylene polymerization catalyst and a first diluent,- decreasing the concentration of said first ethylene polymerization catalyst in said mixing vessel,- transferring to said mixing vessel a second ethylene polymerization catalyst and a second diluent,- progressively replacing said first ethylene polymerization catalyst by said second ethylene polymerization catalyst and said first diluent by said second diluent,- increasing the concentration of said second ethylene polymerization catalyst in said mixing vessel,- sequentially transferring said first ethylene polymerization catalyst and said second ethylene polymerization catalyst from said mixing vessel to an ethylene polymerization reactor.
No. of claims: 15     No. of figures: 1


 

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