Robert Dixon Mcclain

6372121, Apr 16, 2002

Oct 31, 2000

09/703108

Robert D. McClain - Sugar Land TX
Natu R. Patel - Houston TX
Raymond M. Glath - Richmond TX

Nalco/Exxon Energy Chemicals, L.P. - Sugar Land TX

C10G 916

208 48AA, 208 48 R, 585950

This invention is a method to inhibit the polymerization of carbonyl compounds in a basic wash unit operation in a hydrocarbon cracking process, wherein a compound selected from the group consisting of alpha-amino acids and esters thereof and amides thereof and salts thereof and mixtures thereof or Mercaptoacetic acid and alkyl esters thereof, is added either to a stream comprising a carbonyl compound or to the basic wash unit operation; wherein the compound is selected such that it remains water-soluble and base-soluble and does not flocculate in the stream or in the basic wash unit operation; and wherein the stream is contacted with the compound either before or at the same time as the stream enters the basic wash unit operation; or wherein the compound is added to the basic wash unit operation before or while the stream enters the basic wash unit operation.

7566744, Jul 28, 2009

Dec 20, 2004

11/017390

Steven P. Newman - Southampton, GB
Carl Hahn - Sugar Land TX, US
Robert D. McClain - Keller TX, US

Nalco Company - Naperville IL

B01D 17/04
B01D 17/05
C08G 63/66
C08G 69/44

516179, 516161, 516189, 516191, 528417, 528 76, 528300, 528301

The present invention provides environmentally friendly demulsifiers for the break down of petroleum oil applications. The demulsification formulations of the present invention are biodegradable and are low in toxicity. The demulsifiers include a poly(tetramethylene glycol) and an alkylene glycol copolymer linked to the poly(tetramethylene glycol) by a difunctional coupling agent.

20090259004, Oct 15, 2009

Jun 22, 2009

12/489079

Steven P. Newman - Southampton, GB
Carl Hahn - Sugar Land TX, US
Robert D. McClain - Keller TX, US

C08L 53/00
C08G 65/34

525 92 R, 528392

The present invention provides environmentally friendly demulsifiers for the breakdown of petroleum oil applications. The demulsification formulations of the present invention are biodegradable and are low in toxicity. The demulsifiers include a poly(tetramethylene glycol) and an alkylene glycol copolymer linked to the poly(tetramethylene glycol) by a difunctional coupling agent.

53026810, Apr 12, 1994

Dec 10, 1992

7/989933

Robert D. McClain - Houston TX

Nalco Chemical Company - Naperville IL

C08F 3608
C08F 1208
C07C 720

5263402

The premature free-radical polymerization of a non-linear, readily polymerizable organic monomer under conditions where the monomer would otherwise polymerize is inhibited by incorporating within the non-linear, readily polymerizable monomer a polymerization inhibiting amount of a fullerene or a derivative thereof.

51706610, Dec 15, 1992

Dec 20, 1991

7/811181

Vincent E. Lewis - Missouri City TX
David J. Ciarella - Richmond TX
David G. Comer - Sugar Land TX
Robert D. McClain - Sugar Land TX

Nalco Chemical Company - Naperville IL

G01N 500
G01D 2100

73 6162

Generally, the invention provides a fouling probe apparatus. The fouling probe including a heat transfer conduit having a first portion formed as a loop which is removably attached to a second portion which extends linearly. A hollow housing encases the apparatus. The housing has an open forward portion and an open rear portion. The open forward portion is attachable to an oil quench tower about an opening in the quench tower and the open rear portion is adapted to be securely attached to the linearly extending second portion of the heat transfer conduit. A fouling grid is attached to the first portion of the heat transfer conduit. The fouling grid is super-heated to accelerate fouling.

57340986, Mar 31, 1998

Mar 25, 1996

8/621402

Paul R. Kraus - Boilingbrook IL
Robert D. McClain - Sugar Land TX
Michael K. Poindexter - Sugar Land TX

Nalco/Exxon Energy Chemicals, L.P. - Sugar Land TX

G01N 3300

73 6162

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 detected by the thickness-shear mode resonators. The thickness-shear mode resonators are piezoelectric crystals used in conjunction with oscillator circuitry that can determine mass as well as viscosity and/or density of a fluid in contact with the piezoelectric surface.

53626524, Nov 8, 1994

Nov 22, 1993

8/156374

Robert D. McClain - Sugar Land TX

Nalco Chemical Company - Naperville IL

G01N 2100
G01N 3300

436135

A method for the determination of organic hydroperoxides in a hydrocarbon which has been subjected to oxidative polymerization conditions is disclosed. The steps employed in the invention include mixing an organic cupric salt such as cupric acetate and a phenanthroline such as 2,9-dimethyl-1,10-phenanthroline with a sample of the hydrocarbon in an organic solvent such as acetonitrile, measuring the color change after a fixed period of time for cuprous complex formation, and comparing the measurement to the color change of a standard reference to determine the relative quantity of organic hydroperoxide in the sample.

57700419, Jun 23, 1998

Feb 21, 1997

8/804050

Vincent E. Lewis - Missouri City TX
Robert D. McClain - Sugar Land TX
Michael K. Poindexter - Sugar Land TX

Nalco/Exxon Energy Chemicals, L.P. - Sugar Land TX

C10G 916

208 48AA

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 produced hydrocarbons contaminated with oxygen-containing compounds with a caustic solution having a pH>7 which comprises adding an effective deposit-inhibiting amount of a non-enolizable carbonyl compound to the caustic solution. The invention is also a method of inhibiting the formation of fouling deposits occurring in spent caustic wash/stripper systems used for hydrocarbon manufacturing processes. Fouling occurs in these systems when they are in contact with hydrocarbon processing streams contaminated with oxygen-containing compounds, such as aldehydes. These deposits are formed in hydrocarbon processing streams contaminated with oxygen-containing compounds while in contact with a caustic solution having a pH>7.