Exxon Chemical Patents, Inc.

Exxon Research and Engineering Company

Nalco/exxon Energy Chemicals,l.p.

Daniel S Sullivan, Iii

John A Haslegrave

Juan M Garcia, Iii

Niall Carruthers

Paul J Clewlow

Allan R Thomas

Brent I Bourland

Paul Yon-Hin

Stanley J Brois

Grahame Nigel Taylor

Dennis A Williams

Robert C Portnoy

James R Looney

Kevin Kennelley

James D Watson

Terence M O'Brien

Wilbur L Bridges

Philip R Petersen

Eugene R Thomas

Robert J Voorhees

Larry G Coker

Mark A Edwards

Reaction of 1,3,5-tri-substituted-hexahydro-1,3,5-triazine is accelerated in H.sub.2 S scavenging by the addition of quaternary ammonium compound. The preferred hexahydro triazines are 1,3,5-tri-methyl-hexahydro-1,3,5-triazines and 1,3,5-tri-methoxypropyl-hexahydro-1,3,5-triazines. The blend of the hexahydro triazine and quaternary ammonium compounds can be used to treat sour gases and liquids (e.g. sour kerosene, crude oil, fuel oils, heating oils, distillate fuels, bunker fuel oil, and the like.

Method of treating sour gas and liquid hydrocarbon

Gaseous or liquid hydrocarbon is treated with a scavenging compound comprising an oil soluble 1,3,5-trihexahydro-1,3,5-tert.-butyltriazine. The compound is an effective nonregenerated scavenger for oil field produced fluids, particularly sour hydrocarbon liquids.

Amines which are compounds of the formula I: ##STR1## where R is a C.sub.6-20 hydrocarbon;

Amine adducts as corrosion inhibitors

A method of acidizing a subterranean formation with an acqueous acid solution wherein the acid solution contains corrosion inhibiting amounts of an amine derivative prepared by reacting an unsaturated carboxylic acid with (a) fatty amine or polyamine, or (b) a fatty amido amine or polyamine, or (c) a fatty imidazoline amine or polyamine. The derivative is characterized by the absence of primary amino groups, and preferably contains only tertiary amino groups.

Amine derivatives as corrosion inhibitors

A method for treating a hydrocarbon stream containing free sulfur wherein a formulation comprising a diaryldisulfide and a film forming corrosion inhibitor are introduced into the hydrocarbon stream.

Method of inhibiting corrosion in oil field produced fluids

A method of inhibiting corrosion of metal equipment in wells comprises contacting the metal surfaces with an inhibiting amount of a corrosion inhibitor which is the reaction product of a compound containing a carbonyl group (e.g. aldehydes), an amine, and a thiocyanate.

Method of inhibiting corrosion using N-S containing compounds

A method for inhibiting acid corrosion of metal well equipment which comprises introducing into an aqueous acid solution an inhibiting amount of a quaternary compound prepared by reacting a tertiary aromatic heterocyclic amine with a (halo-substituted-aryl) alkyl halide, and contacting the well equipment with the inhibited aqueous acid solution.

Method of inhibiting acid corrosion of ferrous metals

Corrosion inhibition is obtained by treating a system containing corrosion susceptible metal with a corrosion inhibiting amount, preferably 1 to 10,000 ppm of a thio substituted quaternary ammonium salt, preferably of the general structure: ##STR1## wherein R.sub.1 is preferably H or an alkyl group of 8 to 18 carbon atoms, n is 2 or 3, R.sub.2, R.sub.3 and R.sub.4 are preferably alkyl groups of 1 to 18 carbon atoms and two of R.sub.2, R.sub.3 and R.sub.4 are methyl.

N, S containing corrosion inhibitors

Corrosion inhibition of metals is obtained treating a system with a corrosion-inhibiting amount, preferably 1 to 10000 ppm, of an optionally-substituted .beta.-pyridyl-ethylamine or a salt thereof, which may be prepared by reacting an amine with a vinylpyridine, preferably in the presence of an acidic catalyst such as acetic acid. The .beta.-pyridyl-ethylamine is a compound of the general formula: ##STR1## wherein R is an alkyl, aryl, aralkyl, alkaryl, halo or amino group of a group --COX where X is hydrogen, alkyl, aryl, hydroxy, alkoxy, aryloxy, amino or halo group, n is zero or an integer from 1 to 4, and R.sup.1 and R.sup.2, which may be the same or different, each represent a hydrogen atom, an optionally substituted hydrocarbyl radical, an alkylamino radical, a heterocyclic radical or a group ##STR2## or R.sup.1 and R.sup.2 with the intervening nitrogen atom together represent a saturated or unsaturated heterocyclic ring optionally containing one or more additional heteroatoms.

Corrosion inhibitors

The process of preparing thioethers by reacting aliphatic thioalcohols, e.g., mercaptans, including hydrogen sulfide with activated, alpha, beta unsaturated compounds ##STR1## capable of participating in the Michael Addition Rection* in which X is a suitable electron withdrawing group. The Addition, which is carried out in the presence of a catalytic base is greatly improved with respect to minimizing formation of side products by utilizing a specially selected catalyst comprising one or more cyclic tertiary nitrogen compounds having an excellent balance between reactivity and selectivity. The preparation of thioethers from acrylic acid derivatives especially esters (CH.sub.2 .dbd.CH--COOR', R'=C.sub.1 --C.sub.8) is preferred. The preparation of the dimethyl ester of 3,3'-thiodipropionic acid to result in dimethylthiodipropionate of relatively high purity is especially preferred.

Growing community of inventors

Houston, TX, United States of America

Daniel S Sullivan, Iii