09879106 cites 18 patents.

Catalyst systems and methods for making and using the same are described. A method includes selecting a catalyst blend using a blend polydispersity index (bPDI) map. The polydispersity map is generated by generating a number of polymers for at least two catalysts. Each polymer is generated at a different hydrogen to ethylene ratio. At least one catalyst generates a higher molecular weight polymer and another catalyst generates a lower molecular weight polymer. A molecular weight for each polymer is measured. The relationship between the molecular weight of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene is determined. A family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene. A ratio for the catalyst blend of the catalysts that generates a polymer having a bPDI that matches a polymer fabrication process is selected, and the product specific polyolefin is made using the catalyst blend.

Title
Producing polyolefin products
Application Number
15/117816
Publication Number
9879106 (B2)
Application Date
February 10, 2015
Publication Date
January 30, 2018
Inventor
C Jeff Harlan
Houston
TX, US
Garth R Giesbrecht
The Woodlands
TX, US
Timothy M Boller
Houston
TX, US
Ching Tai Lue
Sugar Land
TX, US
Francis C Rix
Houston
TX, US
Agent
Brooks Cameron & Huebsch PLLC
Assignee
Univation Technologies
TX, US
IPC
C08F 4/6592
C08F 210/08
C08F 210/14
C08L 23/08
C08F 2/34
C08J 5/18
C08F 4/659
C08F 4/76
C08F 210/02
C07F 17/00
C08F 4/64
C08F 210/16
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