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Polymerization catalyst delivery

A catalyst and co-catalyst technology, applied in chemical instruments and methods, chemical/physical processes, feeding devices, etc., can solve problems such as production rate changes and instability

Active Publication Date: 2020-01-03
CHEVRON PHILLIPS CHEMICAL CO LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

That is, different feeds of catalyst components to the polymerization reactor can cause variations in the operation and control of the polymerization process that takes place within the polymerization reactor, resulting in variations in production rates and production of products with unstable, undesired or less than ideal properties of polyolefins

Method used

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  • Polymerization catalyst delivery
  • Polymerization catalyst delivery
  • Polymerization catalyst delivery

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Embodiment Construction

[0023] Embodiments of the present disclosure include systems and methods for delivering a polymerization catalyst or polymerization catalyst system to a polymerization zone. The disclosed embodiments allow for the delivery of various polymerization catalysts, such as chromium-based catalysts, Ziegler-Natta catalysts, or metallocene catalysts, as the disclosed systems and related methods enable the delivery of catalysts individually, in series , in combination or as part of a catalyst system to a polymerization zone within a polymerization reactor system. In an embodiment, the catalyst system feed stream is adjusted by measuring the concentration of one or more catalyst components in the catalyst system feed stream and independent of any desired concentration of the source of the one or more catalyst components. The flow rate is controlled by the flow rate of one or more catalyst components.

[0024] As noted above, conventional polymerization equipment typically uses a large ...

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Abstract

A process is described for introducing a catalyst into a polymerization zone by detecting one or a combination of (i) a change in a concentration of the catalyst in a catalyst feed stream upstream ofthe polymerization zone, (ii) a change in a concentration of monomer in the polymerization zone, and (iii) a change in a polymer production rate of the polymerization zone, adjusting a first catalystflow rate of the catalyst in the catalyst feed stream to a second catalyst flow rate based on the one or a combination of (i), (ii), and (iii), and introducing the catalyst into the polymerization zone downstream of a location in the catalyst feed stream where the step of adjusting is performed. A catalyst injection system for carrying out such a process is also provided.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. nonprovisional application Serial No. 15 / 587,629, filed May 5, 2017, the disclosure of which is incorporated herein by reference in its entirety. [0003] Statement Regarding Federally Sponsored Research or Development [0004] Not applicable. [0005] Refer to Microfiche Addendum [0006] Not applicable. technical field [0007] The present disclosure relates to the delivery of catalysts and catalyst systems to reactors; more particularly, the present disclosure relates to a catalyst feed system and a continuous process for delivering catalyst; more specifically, the present disclosure relates to a polymerization catalyst feed A system and a continuous process for delivering polymerization catalyst to a polymerization reactor. Background technique [0008] In the production of polymers (e.g., polyolefins), typically one or more monomers (e.g., one or more olefin mon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J4/00B01J8/00C08F2/00C08F2/01C08F10/02
CPCB01J4/02B01J8/0015C08F2/00C08F2/01B01J2208/00628B01J2208/00752B01J4/008C08F110/02C08F10/02B01J4/00B01J8/00
Inventor A·古塔A·M·巴林斯基R·R·麦克尔文J·D·斯图尔特
Owner CHEVRON PHILLIPS CHEMICAL CO LP
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