	US 11,833,479 B2
	Catalyst slurry mixing process and system
James E. Hein, Houston, TX (US); and Scott E. Kufeld, Houston, TX (US)
Assigned to Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed by Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed on Mar. 26, 2020, as Appl. No. 16/831,571.
Prior Publication US 2021/0299618 A1, Sep. 30, 2021
Int. Cl. B01F 23/50 (2022.01); B01F 23/53 (2022.01); B01F 27/112 (2022.01); B01J 8/00 (2006.01); C08F 4/78 (2006.01); C08F 2/00 (2006.01); C08F 2/12 (2006.01); B01F 23/00 (2022.01)

CPC B01F 23/51 (2022.01) [B01F 23/53 (2022.01); B01F 27/112 (2022.01); B01J 8/0015 (2013.01); C08F 2/00 (2013.01); C08F 4/78 (2013.01); B01F 23/024 (2022.01); B01F 23/565 (2022.01)]

20 Claims

1. A process comprising:

preparing a first catalyst slurry comprising a solid particulate catalyst and a carrier liquid in a catalyst slurry preparation system,

wherein the catalyst slurry preparation system comprises:

a mixing vessel,

a rotatable impeller system connected to the mixing vessel, and

a motor connected to the rotatable impeller system,

wherein the rotatable impeller system comprises an agitator shaft and a first hub connected to the agitator shaft, wherein the first hub and at least a portion of the agitator shaft are positioned within the mixing vessel along a longitudinal axis of the mixing vessel, and wherein the first hub comprises three blades, and

wherein the mixing vessel is a first mixing vessel, the process further comprising:

preparing a second catalyst slurry comprising the solid particulate catalyst and the carrier liquid in the catalyst slurry preparation system,

wherein the catalyst slurry preparation system further comprises:

a second mixing vessel,

a second rotatable impeller system connected to the second mixing vessel, and

a second motor connected to the second rotatable impeller system,

wherein the second rotatable impeller system comprises a second agitator shaft and a second hub connected to the second agitator shaft,

wherein the second hub and at least a portion of the second agitator shaft are positioned within the second mixing vessel along a longitudinal axis of the second mixing vessel,

wherein the second hub comprises three blades,

wherein an outlet of the second mixing vessel is connected to an inlet of the first mixing vessel,

wherein the first mixing vessel is configured to hold a first volume of the first catalyst slurry suitable to feed the first catalyst slurry to a polymerization reactor for 12 to 72 hours, and

wherein the second mixing vessel is configured to hold a second volume of the second catalyst slurry that is four to eight times the first volume of the first catalyst slurry.