1
William K Stephenson, Bradley D Mercer, David G Comer: Refinery anti-foulant - asphaltene dispersant. Nalco Chemical Company, Robert A Miller, Joseph B Barrett, September 1, 1992: US05143594 (18 worldwide citation)

An asphalt or asphaltene refinery anti-foulant technique comprising the use in crude oil, or crude oil fraction, streams of alkyl-substituted phenol formaldehyde liquid resins in combination with hydrophilic-lipophilic vinylic polymers. The polymeric anti-foulant is added to asphalt or asphaltene co ...


2
William K Stephenson, Bradley D Mercer, David G Comer: Refinery anti-foulant - asphaltene dispersant. Nalco Chemical Company, Robert A Miller, Donald G Epple, Joseph B Barrett, March 31, 1992: US05100531 (13 worldwide citation)

An asphalt or asphaltene refinery anti-foulant technique comprising the use in crude oil, or crude oil fraction, streams of alkyl-substituted phenol formaldehyde liquid resins in combination with hydrophilic-lipophilic vinylic polymers. The polymeric anti-foulant is added to asphalt or asphaltene co ...


3
Sherri L Fisher, Bradley D Mercer: Iron sulfide dispersing agents. Nalco Chemical Company, Robert A Miller, James J Drake, July 26, 1994: US05332491 (1 worldwide citation)

A method is disclosed for dispersing iron sulfide in hydrocarbon streams found in refinery and petrochemical plant operations. The dispersant comprises a free radically polymerized copolymer of an .alpha.-olefin of from about 10 to about 36 carbon atoms and maleic anhydride wherein the anhydride moi ...