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:
Apr. 20, 2004
Filed:
Aug. 17, 2000
Spencer Wayne Bruce, Algonquin, IL (US);
James Kent Carpenter, Lambertville, NJ (US);
Jeanine Lee Hurry, North Wales, PA (US);
Joseph Richard Povernick, Philadelphia, PA (US);
Frank Randolph Robertson, III, Pearland, TX (US);
Robert Hugh Schwartz, Parkland, PA (US);
Richard Shu-Hua Wu, Fort Washington, PA (US);
Rohm and Haas Company, Philadelphia, PA (US);
Abstract
This invention relates to a process for cleaning reactors. The process utilizes a solvent fed from multiple pressure sources to clean reactors of residual polymers. The reactors are equipped with agitators and stationary nozzles aimed at the agitator blades. The agitator is rotated during cleaning. The process may also utilize heated aqueous base to clean heat exchangers in external loops. In one aspect, a mixture of at least one organic solvent and aqueous base are utilized to clean certain reactors.