Abstract: The present disclosure generally relates to antifoulant compositions and methods of preventing or inhibiting fouling. The disclosure relates to antifoulant compositions comprising one or more solvents, one or more antipolymerants, and one or more dispersants. The compositions may include other optional components, such as an antioxidant, an alcohol, and/or water. Methods of using the compositions in natural gas dehydrogenation processes to prevent or minimize fouling are also disclosed.

Abstract: Corrosion inhibitor compositions that include a compound of formula (I) are provided. In general, the compound of formula (I) is an environmentally benign quaternarized imidazoline having a lipophilic group. A method of reducing corrosion of a metal surface in contact with an aqueous system that includes adding the disclosed corrosion inhibitor composition to the aqueous system is also provided. Also provided are processes for preparing corrosion inhibitor compounds of formula (I).

Abstract: Corrosion inhibitor compositions that include a compound of formula (I) are provided. In general, the compound of formula (I) is an environmentally benign sugar-derivatized imidazoline having a lipophilic group. A method of reducing corrosion of a metal surface in contact with an aqueous system that includes adding the disclosed corrosion inhibitor composition to the aqueous system is also provided. Also provided are processes for preparing corrosion inhibitor compounds of formula (I).

Abstract: Disclosed are compositions including fatty acid derivatives and methods using the compositions as dispersants, antifoulants, or both. The compositions can be used to prevent or reduce polymer formation and polymer deposition in equipment used in petrochemical processes. The fatty acid derivative compositions are prepared from fatty acid preparations have low amounts of, or no, resin acids and glycerol, and also have low amounts of C16:0- and C18:0-fatty acids, and high total amounts of C18 partially unsaturated fatty acids, and/or the fatty acid derivative compositions are prepared from soy fatty acids and/or canola fatty acids. The fatty acid derivative can be used in compositions and methods to control unwanted polymerization, unwanted corrosion, and/or unwanted settling of particulate materials during industrial processes. Also, compositions of the disclosure have the additional benefit of prolonged storage stability.

Abstract: Inhibitor compositions for abating undesirable emulsion polymerization during processing of hydrocarbon stream laden with reactive vinylic monomers are provided. The polymerization inhibitor compositions include at least a first inhibitor compound having a stable nitroxide radical and a second inhibitor including phenylenediamine. Methods of inhibiting the polymerization of monomers using the compositions of the disclosure are also provided. The methods of inhibiting polymerization of monomers include a step of adding a composition of the disclosure to a process stream. The process stream includes an ethylenically unsaturated monomer that is suspended in the bulk-phase and highly polar solvents as distractive distillation solvents.

Abstract: Inhibitor compositions for abating undesirable polymerization during processing of hydrocarbon stream laden with reactive vinylic monomers are provided. The polymerization inhibitor compositions include at least a first inhibitor compound having a stable nitroxide radical and a second inhibitor including phenylenediamine. Methods of inhibiting the polymerization of monomers using the compositions of the disclosure are also provided. The methods of inhibiting polymerization of monomers include a step of adding a composition of the disclosure to the monomer. In some instances, the monomer is an ethylenically unsaturated monomer. Such ethylenically unsaturated monomers include, but are not limited to, vinyl acetate, acrylonitrile, acrylates, methacrylates, 1,3-butadiene, styrene, isoprene, (meth)acrylic acid, and combinations thereof. Methods of preparing the polymerization inhibitors and compositions of the disclosure are also provided.

Abstract: Polymerization inhibitor compositions are provided. The polymerization inhibitor compositions include at least a first inhibitor compound including a hydroxylamine, a second inhibitor including phenylenediamine, and a third inhibitor including a benzoquinone or naphthoquinone. Methods of inhibiting the polymerization of monomers using the compositions of the disclosure are also provided. The methods of inhibiting polymerization of monomers include a step of adding a composition of the disclosure to the monomer. In some instances, the monomer is an ethylenically unsaturated monomer. Such ethylenically unsaturated monomers include, but are not limited to, vinyl acetate, acrylonitrile, acrylates, methacrylates, 1,3-butadiene, styrene, isoprene, (meth)acrylic acid, and combinations thereof. Methods of preparing the polymerization inhibitors and compositions of the disclosure are also provided.

Abstract: Inhibitor compositions for abating undesirable polymerization during processing of hydrocarbon stream laden with reactive vinylic monomers are provided. The polymerization inhibitor compositions include at least a first inhibitor compound having a stable nitroxide radical and a second inhibitor including phenylenediamine. Methods of inhibiting the polymerization of monomers using the compositions of the disclosure are also provided. The methods of inhibiting polymerization of monomers include a step of adding a composition of the disclosure to the monomer. In some instances, the monomer is an ethylenically unsaturated monomer. Such ethylenically unsaturated monomers include, but are not limited to, vinyl acetate, acrylonitrile, acrylates, methacrylates, 1,3-butadiene, styrene, isoprene, (meth)acrylic acid, and combinations thereof. Methods of preparing the polymerization inhibitors and compositions of the disclosure are also provided.

Abstract: The disclosure provides compositions and methods for reducing fouling of a surface in contact with a medium during a natural gas processing procedure. Methods may include adding a composition to the medium, wherein the medium includes an inorganic particle, an organic particle, and/or an inorganic-organic particle, and the composition includes a surfactant. The surfactant may encapsulate the particle. The surfactant may include, for example, a phthalate ester, a naphthalate ester, a tall oil fatty acid, a soya oil fatty acid, sunflower oil fatty acid, canola oil fatty acid, coconut oil fatty acid, cyrene, a trigylceride, or any combination thereof.

Abstract: The present disclosure generally relates to nonylphenol-free alkoxylated 4-(alkyloxy)phenol/aldehyde resins and processes for making alkoxylated 4-(alkyloxy)phenol/aldehyde resins. The disclosure also relates to methods of breaking emulsions of oil and water comprising the dosing of an effective amount of an emulsion breaker composition into a stable emulsion to destabilize the emulsion, wherein the emulsion breaker composition comprises an alkoxylated 4-(alkyloxy)phenol/aldehyde resin.

Abstract: Described are compositions and methods for inhibiting and retarding polymerization of a monomer composition, which use a naphthoquinone and an oxygenated aminophenol. When present in a monomer-containing composition, the combination of the naphthoquinone and oxygenated aminophenol provides an unexpected beneficial antipolymerant effect inhibiting unwanted formation of fouling polymer. The antipolymerant combination can be added to a hydrocarbon composition, such as a petroleum, that can include a polymerizable components, such as styrene, where the hydrocarbon composition is purified or processed, such as in the case of distillation.

Abstract: The present disclosure provides compositions and method for controlling fouling in a process for cleaning a hydrocarbon gas. The methods may include adding an effective amount of a composition to a conduit including the hydrocarbon gas. The composition includes, for example, various components, additives, and/or solvents. The compositions and methods may also be used for controlling fouling of equipment used during a process for cleaning and compressing a hydrocarbon gas. The equipment may be selected from, for example, a slug catcher, a scrubber, a suction drum, a compressor, and any combination thereof.

Abstract: The present disclosure provides compositions and method for controlling fouling in a process for cleaning a hydrocarbon gas. The methods may include adding an effective amount of a composition to a conduit including the hydrocarbon gas. The composition includes an anti-foam compound and other components are optional, such as a solvent or additive. The compositions and methods may also be used for controlling fouling of equipment used during a process for cleaning and compressing a hydrocarbon gas. The equipment may be selected from, for example, a slug catcher, a scrubber, a suction drum, a compressor, and any combination thereof.

Abstract: Described are compositions and methods for inhibiting and retarding polymerization of a monomer composition, which use a naphthoquinone and a hydroxylamine. When present in a monomer-containing composition, the combination of the naphthoquinone and hydroxylamine provides an unexpected beneficial antipolymerant effect inhibiting unwanted formation of fouling polymer. The antipolymerant combination can be added to a hydrocarbon composition, such as a petroleum, that can include a polymerizable components, such as styrene, where the hydrocarbon composition is purified or processed, such as in the case of distillation.

Abstract: The present disclosure provides methods and compositions for inhibiting corrosion of metallic surfaces and dissolving iron sulfide deposits in aqueous systems. A method may include adding a composition to the aqueous medium. The composition may include malic acid or a salt thereof. The composition may optionally include an organic solvent and/or a corrosion inhibitor.

Abstract: Described are compounds, compositions, and methods that include a nitrogen- and oxygen-containing aromatic compound, such as an aminophenol-based compound, which can be used for inhibiting polymerization of a monomer (e.g., styrene) composition. The compound includes a tertiary amine group wherein the nitrogen is attached to carbon-containing groups, and at least one of oxygen atom separated from the nitrogen by one or more carbon atoms. The antipolymerant can provide excellent antipolymerant activity in a monomer-containing composition.

Abstract: Polymerization inhibitor compositions are provided. The polymerization inhibitor compositions include at least a first inhibitor compound including a hydroxylamine, a second inhibitor including phenylenediamine, and a third inhibitor including a benzoquinone or naphthoquinone. Methods of inhibiting the polymerization of monomers using the compositions of the disclosure are also provided. The methods of inhibiting polymerization of monomers include a step of adding a composition of the disclosure to the monomer. In some instances, the monomer is an ethylenically unsaturated monomer. Such ethylenically unsaturated monomers include, but are not limited to, vinyl acetate, acrylonitrile, acrylates, methacrylates, 1,3-butadiene, styrene, isoprene, (meth)acrylic acid, and combinations thereof. Methods of preparing the polymerization inhibitors and compositions of the disclosure are also provided.

Abstract: Polymerization inhibitor compositions are provided. The polymerization inhibitor compositions include at least a first inhibitor compound having a stable nitroxide radical and a second inhibitor compound having a hydroxylamine. Methods of inhibiting the polymerization of monomers using the compositions of the disclosure are also provided. The methods of inhibiting polymerization of monomers include a step of adding a composition of the disclosure to the monomer. In some instances, the monomer is an ethylenically unsaturated monomer. Such ethylenically unsaturated monomers include, but are not limited to, vinyl acetate, acrylonitrile, acrylates, methacrylates, 1,3-butadiene, styrene, isoprene, (meth)acrylic acid, and combinations thereof. Methods of preparing the polymerization inhibitors and compositions of the disclosure are also provided.

Abstract: Inhibitor compositions for abating undesirable emulsion polymerization during processing of hydrocarbon stream laden with reactive vinylic monomers are provided. The polymerization inhibitor compositions include at least a first inhibitor compound having a stable nitroxide radical and a second inhibitor including phenylenediamine. Methods of inhibiting the polymerization of monomers using the compositions of the disclosure are also provided. The methods of inhibiting polymerization of monomers include a step of adding a composition of the disclosure to a process stream. The process stream includes an ethylenically unsaturated monomer that is suspended in the bulk-phase and highly polar solvents as distractive distillation solvents.

Abstract: Inhibitor compositions for abating undesirable polymerization during processing of hydrocarbon stream laden with reactive vinylic monomers are provided. The polymerization inhibitor compositions include at least a first inhibitor compound having a stable nitroxide radical and a second inhibitor including phenylenediamine. Methods of inhibiting the polymerization of monomers using the compositions of the disclosure are also provided. The methods of inhibiting polymerization of monomers include a step of adding a composition of the disclosure to the monomer. In some instances, the monomer is an ethylenically unsaturated monomer. Such ethylenically unsaturated monomers include, but are not limited to, vinyl acetate, acrylonitrile, acrylates, methacrylates, 1,3-butadiene, styrene, isoprene, (meth)acrylic acid, and combinations thereof. Methods of preparing the polymerization inhibitors and compositions of the disclosure are also provided.