Exxon Chemical Patents, Inc.

Exxon Research and Engineering Company

E.i. Dupont De Nemours and Company

Texas Petrochemicals LP

Ghazi B Dickakian

Ricardo A Bloch

C Edward Baxter, Jr

George A Atherton

Edward D Grant, Jr

Jeffrey Quoc Truong

A crude oil composition wherein fouling has been mitigating and a method for mitigating crude oil fouling. The composition includes crude oil and an improved dispersant material for mitigating fouling which comprises a reaction product of a polyamine and a polyisobutylene succinyl anhydride made with a polyisobutylene having a vinylidene double bond content of at least 50%. The reaction product has an active nitrogen atom content of at least about 2% by weight. The reaction product is prepared by thermally reacting the polyisobutylene with maleic anhydride to produce said polyisobutylene succinyl anhydride and thereafter reacting the polyisobutylene succinyl anhydride with a polyamine having 5 to 7 active nitrogen atoms. The method includes providing the dispersant material and dispersing the same in crude oil.

Crude oil composition including dispersant material for mitigating fouling of process equipment and method for mitigating crude oil fouling

A salt of polyacrylic acid having a molecular weight of between 1,000 and 50,000, preferably 1,000 to 5,000, is used to inhibit inorganic fouling in crude oil.

Antifoulant for inorganic fouling

Dialkylphenylenediamines are used to inhibit oxidation and polymerization of furfural or furfural derivatives. The preferred use of the inhibitor is in the solvent refining of lubricating oils using furfural to extract constituents from the lubricating oils. Prior to and/or during the treatment the acidity of the furfural is adjusted to a level below 0.20 mg KOH/gram furfural.

Process for inhibiting oxidation and polymerization of furfural and its

Dialkylphenylenediamines are used to inhibit oxidation and polymerization of furfural or furfural derivatives. The preferred use of the inhibitor is in the solvent refining of lubricating oils using furfural to extract constituents from the lubricating oils.

Samples of a petroleum oil stream (e.g. crude oil feed stream to a refinery) are continually monitored to determine incompatible asphaltenes therein and the rate of antifoulant is adjusted in response to changes in the level of incompatible asphaltenes. The method of the present invention employs thin layer chromatographic films for separating incompatible asphaltenes and for measuring an optical property indicative of the incompatible asphaltenes, and for varying antifoulant addition in response to changes of the optical property measured.

Method for continual monitoring and treating a hydrocarbon oil stream

A method of inhibiting fouling in a crude ethylene dichloride stream comprises introducing into the stream an inhibiting amount of an antifoulant selected from (A) an acylated amine (e.g., reaction product of polyisobutylene and maleic anhydride) and a polyamine (B) magnesium alkyl aryl sulfonate, and (C) a mixture of A and B.

Process for preventing fouling in the production of ethylene dichloride

A process for preparing a baseoil blend of predetermined coking tendency, and for measuring the effectiveness of additives for reducing coking tendency in baseoils, utilizing the relationship of the content of volatile fractions and low boiling fractions in baseoil to the onset and/or progression of asphaltene formation.

Method of characterizing the effectiveness of baseoil additives

Low temperature asphaltene fouling is inhibited in highly paraffinic crude oil, liquified hydrocarbon gases (e.g. LPG, condensates) and blends thereof by the incorporation of an inhibiting amount of an oil soluble overbased magnesium sulfonate.

Antifoulant additive for light end hydrocarbons

A process for preparing a baseoil blend of predetermined coking tendency, and for measuring the effectiveness of additives for reducing coking tendency in baseoils, utilizing the relationship of the content of volatile fractions and how boiling fractions in baseoil to the onset and/or progression of asphaltene formation.

Method of preparing baseoil blend of predetermined coking tendency

Method of producing a baseoil having a reduced coking tendency by removing precursors from the baseoil. Baseoil having reduced coking tendencies which comprises a substantially no coking precursors therein.

Pretreatment for reducing oxidative reactivity of baseoils

Crude oil (one of which is a high fouling crude oil) are blended to maintain the incompatible asphaltene thereof below a predetermined level thereby reducing the fouling tendency of the high fouling crude oil. Paraffinic liquids, LPG's, and condensates may also be blended with crude oil, while monitoring and controlling incompatible asphaltenes thereof.

Blending of hydrocarbon liquids

Method of characterizing the coking tendency of a baseoil, by:

Method for characterizing the coking tendencies of baseoils and

Apparatus and method for determining the tendency of hydrocarbon liquid to foul equipment includes a horizontal TLC plate, a light source for scanning hydrocarbon liquid sample on the TLC plate, and means for measuring the difference in light reflected by the asphaltene ring and the TLC matrix. Energy sources other than light may be employed.

Apparatus and method for determining fouling tendency of liquid

Apparatus and method for determining the tendency of hydrocarbon liquid to foul equipment includes a horizontal polymeric membrane made from polymers containing polar atoms, a light source for scanning hydrocarbon liquid sample on the membrane, and means for measuring the difference in light reflected by the asphaltene ring and the membrane matrix. Energy sources other than light may be employed.

Apparatus for determining fouling tendency of liquid hydrocarbons using

A method for easily and quickly determining the tendency of a petroleum fraction (oil or resid) to foul in refinery equipment comprises determining the ratio of the saturates or aromatics (polar, neutral or total): asphaltenes for the petroleum in question and comparing this ratio with a plot of ratios and fouling tendencies for a set of prior oils or resids. It has been found that the ratio and the relationship to fouling are completely consistent and reproducible phenomenon which thereby provide a rapid means for a substantially quantitative measure of fouling tendency.

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Kingwood, TX, United States of America

Ghazi B Dickakian