Abstract: A method for inhibiting oilfield scale formation including calcite in a high brine environment comprises introducing an effective amount of a scale inhibiting composition to a high brine environment susceptible to calcite scale formation. The environment has a total dissolved solids content of at least about 150 g/l, and the scale inhibiting composition comprises an aminomethylene posphonate of the formula ##STR1## wherein x is 2 or 3, each Z is independently selected from among H and CH.sub.3, and R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are independently selected from among hydrogen and --CH.sub.2 PO.sub.3 M.sub.2 wherein the M's are independently selected from among the hydrogen and cations associated with Lewis bases, such that at least about 80% of the R.sup.1, R.sup.2, R.sup.3, and R.sup.4 in the composition is --CH.sub.2 PO.sub.3 M.sub.2.

Abstract: A method for reducing friction loss in flowing hydrocarbon fluids is disclosed. The method comprises adding to the fluid an effective amount of an oil-soluble polyamine and a terpolymer of styrene, alkyl acrylate and a carboxylic acid selected from the group consisting of acrylic acid and methacrylic acid. Related compositions are also disclosed.

Abstract: A blend of a first block oxyalkylated copolymer of a bishydroxyalkyl ether and a second block oxyalkylated copolymer of 2-amino-2-hydroxymethyl 1,3-propanediol partially cross-linked with a vinyl polymer in the pH reducing presence of an alkylsulfonic acid is provided and can be used as an effective demulsifier.

Abstract: Oil-in-water emulsions are resolved by contacting the emulsion with a polymer of vinyl phenol or a salt thereof. The polymers may be made by hydrolyzing polyacetoxystyrene.

Abstract: An alkyl 2-thiosubstituted-3-substituted-2-butenoate ##STR1## is prepared by reacting an alkyl 2-chloro-3-substituted-3-butenoate with a thio compound under phase transfer conditions.

Abstract: Certain dithiocarbamates are used as reverse demulsifiers, corrosion and scale inhibitors, flocculants, biocides, flotation aids, water clarifiers, interface control agents and antifoaming agents.

Abstract: Certain dithiocarbamates are used as reverse demulsifiers, corrosion and scale inhibitors, flocculants, biocides, flotation aids, water clarifiers, interface control agents and antifoaming agents.

Abstract: This invention relates to a corrosion inhibited system comprising(1) an oxygenated fuel, and(2) an alkenyl or alkyl succinic acid or a polymer thereof.

Abstract: Hydrogen sulfide gas evolution from water or hydrocarbons, especially during storage or transport of petroleum residua is suppressed by the incorporation of an effective amount of a diamine of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently an alky radical containing 1 to 14 carbon atoms, (CH.sub.2).sub.n --OR.sub.6 or cycloalkyl containing 5 or 6 carbon atoms and R.sub.5 is hydrogen or methyl. R.sub.1 and R.sub.2 and R.sub.3 and R.sub.4 can be alkylene groups joined together with their respective adjacent N to form a heterocyclic ring. R.sub.6 is hydrogen or an alkyl radical having 1 to 5 carbon atoms and n is an integer of 1 to 5.

Abstract: An antioxidant for liquid hydrocarbons such as fuels has the structure ##STR1## wherein X is N or S; R is H or a C.sub.1 to C.sub.5 alkyl moiety; R.sup.1 and R.sup.2 are each independently C.sub.5 to C.sub.18 alkyl or cycloalkyl moieties (which may optionally contain a hetero atom such as oxygen), only one of R.sup.1 and R.sup.2 being present if X is S, or may be combined to form a 5 or preferably 6 membered ring; each R.sup.6 is independently the residue of a C.sub.1 to C.sub.5 aldehyde; and R.sup.7 is the residue of a polyamine of the formula ##STR2## wherein R.sup.3 is a C.sub.8 to C.sub.50 alkyl moiety (which may optionally contain one or more ether linkages); R.sup.4 and R.sup.5 are each independently C.sub.2 to C.sub.6 alkylene moieties; a is 0 or 1; and m is at least 3.

Abstract: A composition adapted for use as a corrosion inhibitor in petroleum-based fuel. The composition comprises an oil-soluble adduct of a triazole and a basic nitrogen compound selected from the group consisting of polyamines, alkoxyamines, aryloxyamines and monoalkyleneamines. Methods for preparation and use of such compositions are also disclosed. In addition, a petroleum-based fuel composition of reduced tendency to corrode copper and aluminum surfaces contacted by the fuel composition is disclosed. The composition comprises a petroleum-based fuel and an oil-soluble adduct of a triazole and a basic nitrogen compound.

Abstract: A method for preparation of aryl-substituted aliphatic hydrocarbons is disclosed. The method comprises reacting in the presence of a solid superacid resin catalyst an unsaturated aliphatic hydrocarbon in liquid form with an aromatic hydrocarbon that is susceptible to Friedel-Crafts reaction. The reaction between the liquid unsaturated aliphatic hydrocarbon and the aromatic hydrocarbon produces a reaction product comprising an aryl-substituted aliphatic hydrocarbon.

Abstract: A method of inhibiting corrosion in an oil well comprises introducing into the well a pourable emulsion comprisinga. 50-95% of a discontinuous aqueous phase (such as ordinary water); andb. 5-50% of a continuous oil phase (such as kerosene or similar hydrocarbon) containing a corrosion inhibiting compound (such as an imidazoline).This method results in more consistent corrosion protection, even if longer treatment intervals are used.

Abstract: Certain dithiocarbamates are used as reverse demulsifiers, corrosion and scale inhibitors, flocculants, biocides, flotation aids, water clarifiers, interface control agents and antifoaming agents.

Abstract: 2,3,5-trisubstituted-2-cyclopentenones or 2,3-disubstituted-2-cyclopentenones (such as cis-jasmone) are prepared by contacting a 3-chloro-3,4-disubstituted-4-pentene-2-one with a strong base. Methods of preparing the reactants are also disclosed.

Abstract: 2,3-disubstituted-2-cyclopenenones (such as cisjasmone) are prepared by (a) reacting an alkl 2-chloro-2,3-disubstituted-3-butenoate with a lithiomercaptan compound, (b) subjecting that product to reductive dehydrosulfurization. Methods of preparing the reactants are also disclosed.

Abstract: N,3,4-trisubstituted-3-azoline-2-ones (such as N-benzyl-3,4-dimethyl-3-azoline-2-one) are prepared by the reaction of an alkyl 2-chloro-2,3-disubstituted-3-butenoate (such as ethyl 2-chloro-2,3-dimethyl-3-butenoate) with a primary amine (such as benzyl amine). Methods for preparing the precursor esters are also disclosed.

Abstract: Certain dithiocarbamates are used as reverse demulsifiers, corrosion and scale inhibitors, flocculants, biocides, flotation aids, water clarifiers, interface control agents and antifoaming agents.

Abstract: Certain dithiocarbamates are used as reverse demulsifiers, corrosion and scale inhibitors, flocculants, biocides, flotation aids, water clarifiers, interface control agents and antifoaming agents.

Abstract: A method for resolving emulsions produced in preparation of pharmaceuticals by fermentation and in other such bioprocesses is disclosed. The method comprises adding an effective amount of a demulsifier to an emulsion containing fermentation product that includes a pharmaceutical which is desired to be extracted from the emulsion.