Baker Hughes Corporation

Petrolite Corporation

Michael J Zetlmeisl

Walter R May

Joseph L Stark

Jerry J Weers

Bradley G Harrell

Thomas J Falkler

George G Duggan

Benjamin T Outlaw

Lawrence N Kremer

Robert L Flanders

Marilyn Wood Blaschke

Eddie C French

Bradley George Borgard

William F Fahey

Roy W Greenlee

Robert R Annand

Joel E Lack

Myron E Schroeder

Kenneth J Tacchi

David M Fischer

Scott Bieber

Kenneth W Koch

David F Laurence

Harrell Bradley G

Harrell Bradley G G

Corrosion induced by the presence of naphthenic acids in hydrocarbon fluids, particularly where such fluids are at elevated temperatures, may be inhibited or controlled through use of corrosion inhibiting compositions comprising a combination of a minor portion of a phosphorus-based constituent and a major portion of a sulfur-based constituent, nitrogen-based constituent, or combination thereof. In another embodiment the sulfur-based constituent and/or nitrogen-based constituent may be used without any phosphorus-based constituent. Where the compounds are appropriately selected, the compositions may inhibit corrosion to a degree comparable or nearly comparable to the inhibition provided by an equal amount of some conventional phosphorus-based compounds alone, but are significantly less likely to impair catalyst activity in downstream cracking and refinery operations.

Method and compositions for inhibition of naphthenic acid induced corrosion

Total acid number and/or corrosiveness of a crude or refined hydrocarbon, where the total acid number and/or corrosiveness is due to the presence of acid compounds such as carboxylic acid (naphthenic acid), may be reduced by treating the hydrocarbon with a metallic overbase. The effect of this treatment may be substantially enhanced by the presence of a hydrogen transfer agent.

Method for reducing acids in crude or refined hydrocarbons

Metal additives to hydrocarbon feed streams give improved hydrocarbon liquid yield during thermal cracking thereof. Suitable additives include metal overbases and metal dispersions and the metals suitable include, but are not necessarily limited to, magnesium, calcium, barium, strontium, aluminum, boron, zinc, silicon, cerium, titanium, zirconium, chromium, molybdenum, tungsten, and/or platinum, overbases and dispersions. Particularly useful metals include magnesium alone or magnesium together with calcium, barium, strontium, boron, zinc, silicon, cerium, titanium, zirconium, chromium, molybdenum, tungsten, and/or platinum. In one non-limiting embodiment, no added hydrogen is employed. Coker feedstocks and visbreaker feeds are particular hydrocarbon feed streams to which the method can be advantageously applied, but the technique may be used on any hydrocarbon feed that is thermally cracked.

Method for improving liquid yield during thermal cracking of hydrocarbons

Metal additives to hydrocarbon feed streams give improved hydrocarbon liquid yield during thermal cracking thereof. Suitable additives include metal overbases and metal dispersions and the metals suitable include, but are not necessarily limited to, magnesium, calcium, barium, strontium, aluminum, boron, zinc, silicon, cerium, titanium, zirconium, chromium, molybdenum, tungsten, and/or platinum, overbases and dispersions. Coker feedstocks and visbreaker feeds are particular hydrocarbon feed streams to which the method can be advantageously applied, but the technique may be used on any hydrocarbon feed that is thermally cracked.

Amine and amine blend compositions neutralize acid environments in distillation overheads of hydrocarbon processing facilities. The neutralizers are composed of certain combinations of amines which are relatively stronger bases and more resistant to hydrochloride salt formation. The amines, when blended together, provide greater neutralization of condensed water present without increased potential for corrosive hydrochloride salt formation.

Multi-amine neutralizer blends

The present invention provides a method for chemical addition utilizing adaptive process control optimizations having a combination of expert system(s), neural network(s) and genetic algorithm(s).

Method for chemical addition utilizing adaptive optimization

Corrosion of iron-containing metal surfaces in a hydrocarbon fluid having a temperature of from about 175.degree. C. to about 400.degree. C. and containing a corrosive amount of naphthenic acid is inhibited by adding to the fluid or to a feed therefor, in a total additive amount sufficient to effect corrosion inhibition in said fluid, one or more thiophosphorus compound, a salt thereof, an alkyl or aryl ester thereof, an isomer thereof, or some combination of the foregoing, thereby to effect inhibition of naphthenic acid induced corrosion in the fluid.

Control of naphthenic acid corrosion with thiophosporus compounds

The present invention, therefore, is directed to a novel method for improving conversion in a fluidized catalytic cracking unit feed stream containing vanadium. According to the method, an effective amount of a composition comprising at least one overbase complex of a magnesium or aluminum salt or a mixture thereof and an organic acid complexing agent is incorporated into the feed stream.

Methods for improving conversion in fluidized catalytic cracking units

A method for inhibiting corrosion of ferrous surfaces in an acidic, aqueous medium having a temperature of at least about 200.degree. F. is disclosed. The method comprises incorporating into the mediumn a corrosion inhibiting amount of a corrosion inhibitor comprising the reaction product of an aldehyde and a composition corresponding to the formula: ##STR1## wherein R.sup.1 is a hydrocarbon group, R.sup.2 and R.sup.3 are independently selected from H and alkyl, R.sup.4 is H, alkyl, alkanol or (alkylene-N).sub.n H wherein n is at least one, and x is 2 or 3. The present invention is also directed to a such method in which the corrosion inhibitor comprises a compound corresponding to the formula: ##STR2## wherein R.sup.1, R.sup.2, and R.sup.3 and x are defined as above.

Corrosion inhibition in highly acidic environments

Corrosion of metal surfaces in contact with a hot hydrocarbon stock containing an appreciable amount of naphthenic acid is inhibited by the presence in the hydrocarbon stock of an effective corrosion inhibiting amount of a dialkyl or trialkyl phosphite, alone or together with a thiazoline.

Corrosion inhibitors for use in hot hydrocarbons

Water soluble corrosion inhibitors which exhibit low hydrocarbon carryunder are prepared by reaction of alkylenepolyamines and formaldehyde.

Corrosion inhibitors

This invention relates to the inhibition of corrosion resulting from the presence of vanadium and sodium in fuels, for example, in residual fuels, such as in those fuels used in steam boilers, process heaters and gas turbines, etc., by adding Mg/Al/Si combinations thereto. Mg/Al/Si combinations are more effective than other inhibitors at a high Na/V ratio.

Inhibition of corrosion in fuels with Mg/Al/Si combinations

A cold end corrosion rate measuring probe consisting of a corrosion rate meter probe modified by the addition of a cooling jacket and a temperature measuring device such as a thermocouple. The probe is adapted to be flush mounted in an exhaust line or flue. A coolant, e.g. water, is circulated through the jacket to bring monitored gas to its dew point, at which point, a corrosion rate measurement can be made. The dew point may also be indicated by increased conductivity across two adjacent electrodes of the probe, e.g., the reference and test electrodes. Measurement of corrosion rate and accompanying dew point can be correlated with sulfur trioxide concentration in flue or exhaust gases and hence enables predictability of occurrence and location of 'cold end' corrosion, which also indicates inhibitor effectiveness.

Cold end corrosion rate probe

This invention relates to the inhibition of corrosion in fuels, for example, in residual fuels, such as in those fuels used in steam boilers, process heaters and gas turbines, etc., by adding Mg/Si/Mn combinations thereto. Mg/Si/Mn combinations are not only very effective in inhibiting both corrosion and slag at high Na/V ratios but also produce other benefits including the reduction in smoke emissions when the fuel is combusted at improper fuel/air ratios.

Inhibition of corrosion in fuels with Mg/Si/Mn combinations

This invention relates to the inhibition of lead corrosion in fuel, for example, in residual fuels, such as in those fuels used in steam boilers and gas turbines, by adding certain metals thereto such as magnesium, calcium, aluminum, silicon, and combinations thereof.

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Katy, TX, United States of America

Michael J Zetlmeisl