[12] Patent
[11] Patent No.:GC0007639  
[45] Date of Publishing the Grant of the Patent: 30/Apr /2018                48/2018  
Number of the Decision to Grant the Patent:2018/126405
Date of the Decision to Grant the Patent:24/Apr/2018

[21] Application No.:GC 2013-33265

[22] Filing Date:8/9/2013

[30] Priority:

[33] State [32] Priority date [31] Priority No.

[72] Inventors:1- Abarajith S. Hari ،2- Bruce J. Savatsky،3- David M. Glowczwski ،4- Xianyi Cao

[73] Owner: Univation Technologies, LLC, 5555 San Felipe, Suite 1950, Houston, 77056, Texas, USA

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




Int. Cl.: G01N 11/14, 3/22, 33/44 (2006.01)

[56] Cited Documents:

-EP 1040129 A1 (BP CHEM INT LTD [GB]; BP CHEMICALS SNC [FR]) 04 October 2000
-WO 2011/147539 A1 (SAUDI BASIC IND CORP SABIC [SA]; BANAT YAHYA [SA]; ET AL) 01 December 2011
-US 2007/265400 A1 (FISCHBUCH D B [US] ET AL) 15 November 2007
Examiner: Eng. Yusuf AlRaqabi

[57] Abstract: Methods and systems for controlling a polymerization reactor in a non-sticking regime are disclosed. An exemplary method includes measuring parameters for the polymerization reaction including a reactor temperature and a concentration of an induced condensing agent (ICA) in a polymerization reactor. An equivalent partial pressure ((PICA )equiv) of the ICA is calculated. The polymerization reactor operation is located in a two dimension space defined by a reactor temperature dimension and a ((PICA )equiv) dimension. The location in the two dimensional space is compared to an non-sticking regime, defined as the space between an upper temperature limit (UTL) curve and a lower temperature limit (LTL) curve. Parameters of the polymerization reactor are adjusted to keep the reactor within the non-sticking regime.
No. of claims: 13     No. of figures: 19


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