Betz Laboratories, Inc.

Betzdearborn, Inc.

Cities Service Company

Cities Service Oil and Gas Corporation

Paul V Roling

Joseph H Niu

Dwight K Reid

David R Forester

Quincy K Sintim

Cato Russell McDaniel

Richard L Veazey

B Timothy Pennington

John T Hsieh

Bruce E Wright

David E Aylward

Alan E Goliaszewski

Graciela B Arhancet

Wiley Lyle Parker

Rosalie B Hart

J Frederick Martin

David R Foresteer

Quincy K A Sintim

Bernard C Groce

Timothy S Williams

John E Martin

Methods for inhibiting pyrophoric iron sulfide activity are disclosed. Methods are disclosed for inhibiting the sulfidation of iron oxides to iron sulfides and/or the oxidation of iron sulfide to inhibit pyrophoric activity. The methods comprise contacting iron oxides and/or iron sulfide with a liquid, solution, aerosol, or gaseous inhibitor comprising alkylamines, arylamines, imines; oxygen-containing compounds such as alcohols, aldehydes, esters, acids and ketones; mixed nitrogen-containing and oxygen-containing compounds such as alkanolamines, non-polymeric amides, hydroxylamines, Mannich products, polyisobutylenesuccinimides, oximes; sulfur-containing compounds and phosphorus-containing compounds.

Inhibition of pyrophoric iron sulfide activity

Methods for inhibiting pyrophoric iron sulfide activity are disclosed. Methods are disclosed for inhibiting the oxidation of iron sulfide to inhibit pyrophoric activity. The methods comprise contacting iron oxides and/or iron sulfide with a liquid, solution, aerosol, or gaseous inhibitor comprising aromatic hydrocarbons such as alkyl substituted benzenes.

In the thermal processing of crude alkanolamines, a method of inhibiting color formation in the alkanolamines comprising adding an amount, effective for the purpose, of an alkali metal hydroxide or sulfite, or mixtures thereof.

Inhibitors of color formation in alkanolamines

A Mannich reaction product of reactants selected from alkylated phenols, a polyamine and an aldehyde is employed to dissolve tar deposits in coke oven piping and transmission lines.

Tar dissolution process

An oxygen scavenger for aqueous mediums is disclosed. The oxygen scavengers comprise cyclohexanediones which, when added to basic aqueous solutions, effectively scavenge oxygen from the aqueous solutions. The oxygen scavenger has particular utility as an oxygen scavenger from water in heating systems such as boilers and heat exchangers.

Cyclohexanedione oxygen scavengers

Methods and compositions are provided for inhibiting the polymerization of butadiene-containing streams during elevated temperature processing thereof or during storage or shipment of monomer containing product. The composition comprises a combination of (a) a phenylenediamine compound having at least one N--H bond and (b) a hydroxytoluene compound. The methods comprise adding from about 1-250 ppm of the combination to the monomer medium, per one million parts of medium.

Methods for inhibiting ethylenically unsaturated monomers

Disclosed are methods for dispersing sulfur in aqueous systems comprising adding an alkylcarboxylic acid compound to the system. This prevents fouling of the aqueous system by the precipitated sulfur.

Methods for dispersing sulfur in aqueous systems

A method of extracting iron species from a liquid hydrocarbon medium comprising adding to the medium a composition comprised of an aminocarboxylic acid, methoxypropylamine and a solvent selected from the group consisting of 2-ethylhexanol, cresylic acid, ethylene glycol and hexylene glycol.

Method for the extraction of iron from liquid hydrocarbons

Compositions and methods of extracting soluble iron species, such as iron naphthenate, from a liquid hydrocarbon, such as crude oil are disclosed. A Mannich reaction product is added to the liquid hydrocarbon and mixed therewith. Then, wash water is added to form a water-in-oil emulsion. The emulsion is resolved, with the iron laden aqueous phase being separated.

Compositions for extracting iron species from liquid hydrocarbon systems

Sulfur containing Mannich reaction product compounds are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude and gas oil distillates during processing of such liquids at elevated temperatures.

Methods for controlling fouling deposit formation in a liquid

Methods and compositions are provided for inhibiting the polymerization of acrylic acid monomers during elevated temperature processing thereof or during storage or shipment of acrylic acid product. The compositions comprise a combination of a cerium source compound and an aromatic amine compound. The methods comprise adding from about 1 to about 10,000 parts per million to the particular acrylic acid containing medium for which such polymerization inhibition is desired, per million parts of the acrylic acid medium.

Methods and compositions for inhibiting acrylic acid polymerization

The present invention is directed to the use of a solution of a percarbonate compound to prevent fouling during the basic washing of hydrocarbons containing oxygenated compounds. More specifically, oxygenated compounds such as carbonyl containing organics have a tendency to polymerize, producing fouling elements when such are contained in hydrocarbons being washed with basic materials. Solutions of percarbonate compounds are quite effective in reducing the fouling tendencies due to these specific mechanisms.

Method for the prevention of fouling in a caustic solution

Phosphorus derivatives of polyalkenylsuccinimides and methods of use of such derivatives as antifoulants in liquid hydrocarbonaceous mediums, such as crude oil, during processing at elevated temperatures are disclosed. The derivatives are formed via reaction of a polyalkenylsuccinimide intermediate with formaldehyde and a phosphorus compound having at least one acidic hydrogen P-H bond. The intermediate is first formed via reaction of polyalkenylsuccinic anhydride and polyamine.

Compositions of phosphorus derivatives of polyalkenylsuccinimides

A method for inhibiting the formation of polymeric based fouling deposits normally formed during the caustic washing to hydrocarbons is disclosed. The method comprises adding an effective amount for the purpose of an acetoacetate ester compound to the caustic wash system.

Method for inhibiting fouling in caustic scrubber systems

Glyoxylic acid/alkylphenol derivatives of polyalkenylsuccinimides are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude and gas oil distillates during processing of such liquids at elevated temperatures.

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Spring, TX, United States of America

Paul V Roling