General Electric Company

Atlantic Richfield Company

Baker Hughes Corporation

Hercules Corporation

Atlantic Richfield Corporation

Bl Technologies, Inc.

John Link

Richard F Miller

Sherif Eldin

Marilyn W Blaschke

Lawrence N Kremer

Glenn L Roof

Vinod Kumar Rai

Alagarsamy Subbiah

Zen-Yu Chang

Bradley George Borgard

Mary King

Mike Hong

Tiffany N Morris

Jack B Harrell, Jr

H Kelly Herrington

Flavio Weissheimer

Ronnie L Deason

Alagarsamy A Subbiah

Methods for scavenging carbon disulfide ('CS') from hydrocarbon streams using treatment compositions comprising at least one CSscavenger and at least one phase transfer catalyst therein. The CSscavenger may comprise at least one polyamine with the general formula: HN&#x2014;(R&#x2014;NH)&#x2014;R&#x2014;(NH&#x2014;R)&#x2014;NHwherein R, R, Rmay be the same or different H, aryl or C-Calkyl; and x and y may be integers from 0 to 10. A hydrocarbon product with a reduced concentration of CStherein.

Use of diethylenetriamine as a CS2 scavenger in isoprene production

Methods of inhibiting corrosion in a benzene distillation or dryer unit are provided wherein alkenyl succinic acids or anhydrides (ASA) are brought into contact with metal surfaces thereby protecting the metal from an acidic corrosive medium flowing through the overhead. The benzene distillation column or drying tower may be utilized to purify benzene for subsequent feed of the purified benzene to an alkylation process such as in the alkylation of benzene by ethene to form ethylbenzene utilizing a zeolite alkylation catalyst.

Alkenyl succinic acids or anhydrides as corrosion inhibitors for metal surfaces

Methods and compositions are provided for inhibiting the polymerization of a vinyl aromatic monomer, such as styrene monomer, during elevated temperature processing or distillation thereof. The compositions comprise an inhibitor combination of (A) a hydroxylamine and (B) a stable free radical plus a retarder that is either; (C) dinitrobutylphenol or (D) quinone methide. The ratio of (A) to (B) ranges from about 5% (A) to 95% (B) to about 95% (A) to about 5% (B). The compositions are added to the vinyl aromatic monomer in amounts sufficient to prevent polymerization during the distillation process. Typically the inhibitor combination is added to the vinyl aromatic monomer in an amount ranging from about 10 to 150 ppm of the monomer. Retarders are typically added in an amount ranging from 50 to 1500 ppm of the vinyl aromatic monomer.

Methods and compositions for inhibiting polystyrene formation during styrene production

Methods and compositions are provided for inhibiting the polymerization of a vinyl aromatic monomer, such as styrene monomer, during elevated temperature processing or distillation thereof or during storage or shipment of polymer containing product. The compositions include a combination of a hydroxybenzyl alcohol (1) and a dehydration catalyst (2). The combination is added to a vinyl aromatic monomer. Typically, the hydroxybenzyl alcohol is dehydrated in the styrene solution by the use of a strong acid catalyst acting as the dehydration catalyst, and the resultant reaction product is a quinone methide styrene inhibitor.

Methods and compositions for styrene inhibition via in situ generation of quinone methides

A method for inhibiting the formation of fouling materials during hydrocarbon processing is provided. Hydrocarbon media, which is undergoing treatment with a basic wash and contains carbonyl compounds is contacted with hydroxylamine and naphthalene sulfonate to inhibit the formation of fouling materials and to minimize the deposition of fouling compounds that may occur during hydrocarbon processing.

Processes for inhibiting fouling in hydrocarbon processing

Methods and compositions are provided for inhibiting the polymerization of a vinyl aromatic monomer, such as styrene monomer, during elevated temperature processing thereof or during storage or shipment of polymer containing product. The compositions comprise a combination of a quinone methide derivative A) and a phenol compound B). The methods comprise adding from about 1-10,000 ppm of the combination to the monomer containing medium, per one million parts of the monomer.

Methods and compositions for inhibiting vinyl aromatic monomer polymerization

A method for dispersing polymerization by-products and maintaining said by-products in suspension in a hydrocarbon processing system during acrylic acid and acrylate monomer formation is disclosed, which includes adding to the monomer an effective inhibiting amount of an N-alkyl polyalkenyl succinimide dispersant.

Use of polyalkenyl succinimides in acrylic acid production

Compositions and methods for inhibiting polymerization of ethylenically unsaturated monomers are provided. The compositions include a water-soluble phenylenediamine composition.

Water-soluble phenylenediamine compositions and methods for stabilizing ethylenically unsaturated compounds and monomers

Quinone methide derivatives such as 4-benzylidene-2,6-di-tert-butyl-cyclohexa-2,5 dienone are used to inhibit styrene monomer polymerization in the dehydrogenator portion of a styrene monomer production system. The inhibitor contacts the dehydrogenation effluent and does not partition in substantial amounts to the aqueous phase that is separated in the phase separator.

Polymerization inhibitor for styrene dehydrogenation units

Method, composition and mixture for inhibiting monomer polymerization

The present invention provides compositions and methods which are effective to prevent corrosion of metal surfaces involved in refining solutions having relatively high partial pressures of carbon dioxide. The compositions of the present invention comprise mixtures of a pyridinium quaternary salt and an organic compound, such as thiourea, which contains at least one sulfur atom double bonded to a carbon atom. The compositions are added substantially continuously to the solution to be treated to result in a final concentration of at least about 30 ppm of pyridinium quaternary salt, preferably between about 56-70 ppm, and at least about 5 ppm double bonded sulfur containing compound, preferably between about 10-13 ppm.

Water soluble corrosion inhibitor effective against corrosion by carbon

Sour sulfhydryl-group containing oils are treated with an amount of hexamethylenetetramine effective to sweeten the oil and reduce headspace H.sub.2 S to a desired level.

Sweetening of oils using hexamethylenetetramine

Novel organic water-soluble antimony compounds are prepared by reacting an alkoxyalkylamine with a hydroxycarboxylic acid to form an intermediate product and then reacting the intermediate product with an antimony oxide. These compounds are useful for use as catalyst metal poison passivators.

Novel water-soluble antimony compounds and their preparation

Novel organic water-soluble antimony compounds are prepared by reacting an alkanolamine with a hydroxycarboxylic acid to form an intermediate product and then reacting the intermediate product with an antimony oxide. These compounds are useful for use as catalyst metal poison passivators.

Novel organic water-soluble antimony compounds are prepared by reacting ammonia or an alkylamine with a hydroxycarboxylic acid to form an intermediate product and then reacting the intermediate product with an antimony oxide. These compounds are useful for use as catalyst metal poison passivators.

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Humble, TX, United States of America

John Link