The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 17, 2021
Filed:
Oct. 17, 2018
Exxonmobil Chemical Patents Inc., Baytown, TX (US);
Brian R. Greenhalgh, Houston, TX (US);
Ronnie D. Bryant, Gonzales, LA (US);
Allison C. Buenemann, Baton Rouge, LA (US);
Benjamin C. Duff, Baton Rouge, LA (US);
Philip M. Duvall, Baton Rouge, LA (US);
Joseph A. Moebus, Houston, TX (US);
ExxonMobil Chemical Patents Inc., Baytown, TX (US);
Abstract
Methods of online cleaning of heat exchangers at elevated temperatures are provided. Cleaning of the heat exchanger is achieved through an increasing heat exchanger effluent temperature of a polymer solution together with operating under optimized process conditions provided by a phase diagram constructed for the polymer solution. The separation of polymer from unreacted monomers and solvent in the polymer solution is carried out by raising the temperature of the polymer solution as reactor effluent flowing through the heat exchanger. Then, subsequently and by reducing pressure of the heat exchanger effluent, the polymer solution separates into two liquid phases.