1
Paul R Kraus, Robert D McClain, Michael K Poindexter: Method to monitor and control chemical treatment of petroleum, petrochemical and processes with on-line quartz crystal microbalance sensors. Nalco Exxon Energy Chemicals, Robert A Miller, Kelly L Cummings, March 31, 1998: US05734098 (79 worldwide citation)

Thickness-shear mode resonators which simultaneously measure mass deposition and fluid properties can be utilized to monitor petroleum processing, petrochemical and water treatment systems. Specialty chemical additive materials can be accurately and instantaneously added to control conditions detect ...


2
Elizabeth Babaian Kibala, Veronica K Braden, Michael K Poindexter, Christopher J Murphy: Corrosion inhibition in refineries using the reaction product of hydrocarbyl succinic anhydride and an amine. Nalco Exxon Energy Chemicals, Robert A Miller, James J Drake, September 17, 1996: US05556575 (12 worldwide citation)

Disclosed are a method for inhibiting corrosion in crude oil distillation towers, an improvement in crude oil fractionation, a method for dispersing iron sulfide in a hydrocarbon stream and a hydrocarbon dispersion using the reaction product of hydrocarbyl succinic anhydride and an amine. The reacti ...


3
Youdong Tong, Michael K Poindexter: Phosphorothioate coking inhibitors. Nalco Chemical Company, Robert A Miller, Daniel N Lundeen, October 11, 1994: US05354450 (11 worldwide citation)

Inhibiting coke formation on heat transfer surfaces used to heat or cool a petroleum feedstock at coke-forming conditions. The heat transfer surfaces are treated with an effective amount of S,S,S-trihydrocarbyl phosphorotrithioate to inhibit coke formation on the heat transfer surfaces. The phosphor ...


4
Vincent E Lewis, Robert D McClain, Michael K Poindexter: Non-enolizable oxygenates as antifoulants. Nalco Exxon Energy Chemicals, Elaine M Ramesh, Thomas M Breininger, June 23, 1998: US05770041 (9 worldwide citation)

The invention is a method of inhibiting the formation of fouling deposits occurring on the surface of an alkaline scrubber used to remove acid gases, such as hydrogen sulfide, carbon dioxide and mercaptans, from hydrocarbon streams. These deposits are formed during the scrubbing of pyrolytically pro ...


5
Youdong Tong, Michael K Poindexter: Phosphoric triamide coking inhibitors. Nalco Chemical Company, Robert A Miller, James J Drake, Daniel N Lundeen, November 1, 1994: US05360531 (8 worldwide citation)

Inhibiting coke formation on heat transfer surfaces used to heat or cool a petroleum feedstock at coke-forming conditions. The heat transfer surfaces are treated with an effective amount of tripiperidinophosphine oxide to inhibit coke formation on the heat transfer surfaces. The tripiperidinophosphi ...


6
Michael K Poindexter: Antifoulant composition comprising an acrylate ester containing C.sub.4 -C.sub.22 alcohol esters and amino alcohol esters and phenylene diamine. Nalco Chemical Company, Robert A Miller, John G Premo, Joseph B Barrett, August 31, 1993: US05240469 (7 worldwide citation)

A method for preventing fouling of ethylene dichloride distillation units which comprises treating the feed to such units with a fouling preventing amount of a composition comprising:


7
Youdong Tong, Michael K Poindexter: Method of inhibiting coke deposition in pyrolysis furnaces. Nalco Exxon Energy Chemicals, Kelly L Cummings, Thomas M Breininger, September 21, 1999: US05954943 (5 worldwide citation)

A method is disclosed for reducing coke deposition in a pyrolysis furnace which comprises treating the pyrolysis furnace with a combination of sulfur- and phosphorus-containing compounds having a total sulfur to phosphorus atomic ratio of at least 5.


8
Michael K Poindexter: Fouling prevention in ethylene dichloride distillation units. Nalco Chemical Company, Joseph B Barrett, Robert A Miller, James J Drake, June 28, 1994: US05324393 (5 worldwide citation)

A method for preventing fouling of ethylene dichloride distillation units which comprises treating the feed to such unit with a fouling preventing amount of a composition comprising (a) 2-15 weight % of an oil soluble polyacrylate ester or methacrylate ester with alcohol radical of the ester group c ...


9
Youdong Tong, Michael K Poindexter, C Tom Rowe: Coke inhibitors for pyrolysis furnaces. Nalco Exxon Energy Chemicals, Robert A Miller, Kelly L Cummings, March 31, 1998: US05733438 (4 worldwide citation)

Aromatic compounds in small amounts function as antifoulant additives in pyrolysis furnaces which are subjected to elevated temperatures from about 500.degree. C. to about 1200.degree. C. when thermally convening hydrocarbons to ethylene as well as other useful products. These furnaces produce mater ...


10
Youdong Tong, Michael K Poindexter: Phosphonate/thiophosphonate coking inhibitors. Nalco Exxon Energy Chemicals, Tom M Breininger, Kelly L Cummings, July 14, 1998: US05779881 (2 worldwide citation)

A method to inhibit coke formation on heat transfer surfaces used to heat or cool a petroleum feedstock at coke-forming conditions is disclosed. The heat transfer surfaces are treated with an effective amount of phosphonate to inhibit coke formation on the heat transfer surfaces. The phosphonate is ...