Nalco Company

Ecolab USA Inc.

Ron Sharpe

Dennis R Compton

Samuel Jefferies

Christopher Russell

Simon Crozier

The invention provides a method of removing sulfides from viscous petroleum streams such as asphalt, crude oil, and oil slurry using zinc octoate in which the molar ratio of zinc complexed with octanoic acid is not 1:2. Because zinc has a +2 charge and carboxylic acid has a &#x2212;1 charge, it was previously assumed that all zinc octoates must have a 1:2 ratio of zinc moieties to carboxylic acid. Zinc octoate formulations however, that contain a non 1:2 ratio, and those with 2.1:3 to 1.97:3 in particular, have in fact been shown to work better. In addition, these non 1:2 formulations have lower viscosity and therefore are easier to use than the previous formulations including a 1:2 ratio.

Method of removing hydrogen sulfide

The invention provides a method and apparatus for controlling the formation of foulant deposits on petroleum processing equipment. The invention involves a first mixture comprising an acid phosphate ester. The first mixture is applied to the surface of the petroleum processing equipment at a high temperature. Then a second mixture comprising a metal salt is applied also at a high temperature. The result is sufficient to provide an effective coating that prevents the formation of foulant deposits on the petroleum processing equipment. The second mixture reacts with any polyphosphate in the coating to prevent any contamination of petroleum materials within the petroleum processing equipment.

Surface passivation technique for reduction of fouling

A method of predicting the stability of a hydrocarbon process stream is disclosed and claimed. The method includes obtaining samples from one or more process streams and measuring the actual stability and the near infrared spectral absorbance of those samples. A classification model is initially developed to identify sample subsets and correlation model is created using the stability and absorbance data by inserting that data into a mathematical function. Online or offline measurements are then taken from the hydrocarbon process stream, the classification model is used initially to identify the subset and corresponding correlation model is used to predict the stability of the stream.

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Lymington, United Kingdom

Ron Sharpe