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公开(公告)号：US11806685B2
公开(公告)日：2023-11-07
申请号：US16998204
申请日：2020-08-20
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Douglas J. Picou , Keith W. Trapp , Kelly M. Forcht , Asha C. Quant , Ariana L. Poindexter , Maxwell T. Mcgee
CPC classification number: B01J19/06 , B01J19/0033 , B01J19/2455 , C08F10/02 , B01J2219/00202 , B01J2219/00234 , B01J2219/00238
Abstract: A process and system for maintaining optimum polymerization production in a loop polymerization reactor by continuously and periodically obtaining polymerization results, such as melt index (MI), production rate and ash content of the polymer produced, determining whether each of the results is within desired ranges, storing and averaging recently obtained results in a database within a reaction rate controller program, and when one of the results is out of the desired range modifying at least one reaction parameter set-point such as monomer concentration, catalyst feed rate and reactor temperature to drive any out-of-range polymerization result(s) toward the desired range for that result.
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公开(公告)号：US12116430B2
公开(公告)日：2024-10-15
申请号：US17425910
申请日：2020-01-23
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Keith W. Trapp , John L. Begue , Kelly M. Forcht , Douglas J. Picou
CPC classification number: C08F2/01 , B01J4/008 , B01J19/0006 , B01J19/0053 , B01J2219/00164 , B01J2219/00182
Abstract: A method for regulating use of stored diluent in a polymerization process so as to maximize use of diluent recycled diluent recovered from the process, and so minimize use of stored diluent, is disclosed. Also disclosed is apparatus, particularly as an arrangement of controllers and valves for handling the flow of diluent through the process that can be used to implement the disclosed process.
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公开(公告)号：US11596918B2
公开(公告)日：2023-03-07
申请号：US16998237
申请日：2020-08-20
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： John L. Begue , Kelly M. Forcht , Keith W. Trapp
Abstract: A method for minimizing the amount of catalyst inactivating agent that is present in a liquid fraction recovered from a slurry-based polymer production process, the liquid fraction comprising diluent used in the polymer production process, is disclosed. The method includes steps for controlling the pressure over the liquid fraction collected during diluent recovery so as to minimize the concentration of catalyst inactivating agent that is retained in the recovered liquid fraction. Embodiments of apparatus suitable for conducting the disclosed method are also provided.
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公开(公告)号：US20210077974A1
公开(公告)日：2021-03-18
申请号：US16998204
申请日：2020-08-20
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Douglas J. Picou , Keith W. Trapp , Kelly M. Forcht , Asha C. Quant , Ariana L. Poindexter , Maxwell T. Mcgee
Abstract: A process and system for maintaining optimum polymerization production in a loop polymerization reactor by continuously and periodically obtaining polymerization results, such as melt index (MI), production rate and ash content of the polymer produced, determining whether each of the results is within desired ranges, storing and averaging recently obtained results in a database within a reaction rate controller program, and when one of the results is out of the desired range modifying at least one reaction parameter set-point such as monomer concentration, catalyst feed rate and reactor temperature to drive any out-of-range polymerization result(s) toward the desired range for that result.
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