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:
Nov. 16, 1999
Filed:
Feb. 17, 1998
Applicant:
Inventors:
Maria B Manek, Stafford, TX (US);
Chin Hai Chen, Sugar Land, TX (US);
Roberto G Presenti, W. University, TX (US);
Hernando Diaz-Arauzo, Sugar Land, TX (US);
Assignee:
Nalco/Exxon Energy Chemicals, L.P., Naperville, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C10G / ; C10G / ; F17D / ;
U.S. Cl.
CPC ...
516 31 ; 137 13 ; 208 / ; 208 / ; 507 90 ;
Abstract
A method is disclosed for mitigating fouling and reducing viscosity in primary fractionators and quench sections of ethylene plants by adding to a hydrocarbon stream a mono and/or a polyalkyl-substituted phenol-formaldehyde resin having a weight average molecular weight of from about 1,000 to about 30,000 and at least one alkyl substituent containing from about 4 to about 24 carbon atoms, which alkyl substituent may be linear or branched.