A process for removing sulfur compounds from a liquid composition immiscible with water, comprising at least partially oxidizing the sulfur compounds by contacting a liquid composition comprising at least one sulfur compound with an aqueous oxidizing solution comprising at least one oxidant in the presence of at least one polyoxometalate and amphiphilic solid particles.

Various embodiments disclosed relate to a method of oxidizing sulfur-containing compounds. The method involves contacting a sulfur-containing compound with a helmet phthalocyaninato-type catalyst in the presence of an oxidant. The present invention also provides a method of removing undesired sulfur-containing compounds from a fluid, such as natural gas, crude oil or an aqueous waste stream.

Oxidized disulfide oil (ODSO) solvent compositions are derived from by-product disulfide oil (DSO) compounds produced as by-products from the generalized mercaptan oxidation (MEROX) processing of a refinery feedstock. The oxidized disulfide oil (ODSO) solvent compositions comprise at least a primary oxidized disulfide oil (ODSO) compound selected from either water soluble or water insoluble oxidized disulfide oil (ODSO) compounds and in some embodiments at least 0.1 ppmw of a secondary oxidized disulfide oil (ODSO) compound that is a water soluble oxidized disulfide oil (ODSO) compound.

A nanocomposite composition for oxidative desulfurization of liquid hydrocarbon fuels, is disclosed. The nanocomposite composition comprises an amorphous mesoporous titania-silica (TiO.sub.2—SiO.sub.2) nanocomposite oxidative desulfurization (ODS) catalyst-adsorbent, including, a chelating agent, an alcohol, an alkoxides precursor of silica and titania, water, an organic polymer and a textural agent. The nanocomposite ODS catalyst-adsorbent is prepared with the aid of polyethylene glycol (PEG) as directing agent and citric acid (CA) as chelating agent. The PEG increases the specific surface area and average pore diameter of ODS catalyst-adsorbent, which facilitates the diffusion of bulky sulfur compounds into porosities of catalyst and adsorption of oxidized sulfur compounds on the catalyst surface. The citric acid controls the hydrolysis and condensation of titanium precursor, which improves ODS performance of catalyst-adsorbent. Further, the prepared ODS catalyst-adsorbent is a dual function material capable of catalyzing the oxidation sulfur compounds and their removal to an ultra-low level in hydrocarbon fuel.

Oxidized disulfide oil (ODSO) solvent compositions are derived from by-product disulfide oil (DSO) compounds produced as by-products from the generalized mercaptan oxidation (MEROX) processing of a refinery feedstock. The oxidized disulfide oil (ODSO) solvent compositions comprise at least a primary oxidized disulfide oil (ODSO) compound selected from either water soluble or water insoluble oxidized disulfide oil (ODSO) compounds and in some embodiments at least 0.1 ppmw of a secondary oxidized disulfide oil (ODSO) compound that is a water soluble oxidized disulfide oil (ODSO) compound.

Oxidized disulfide oil (ODSO) solvent compositions are derived from by-product disulfide oil (DSO) compounds produced as by-products from the generalized mercaptan oxidation (MEROX) processing of a refinery feedstock. The oxidized disulfide oil (ODSO) solvent compositions comprise at least a primary oxidized disulfide oil (ODSO) compound selected from either water soluble or water insoluble oxidized disulfide oil (ODSO) compounds and in some embodiments at least 0.1 ppmw of a secondary oxidized disulfide oil (ODSO) compound that is a water soluble oxidized disulfide oil (ODSO) compound.

The present invention describes an extractive oxidation process for removing contaminants from hydrocarbon streams using an ionic liquid combined with an organometallic ionic complex of iron(II), which comprises a complex of iron(II) cation with an ionophilic binder, catalyst of iron(II) with ionophilic binder in its molecular structure, oxidation of which is performed with an oxidizing agent and is catalysed by the organometallic iron(II) complex present in the phase of the ionic liquid.

Besides maintaining its characteristics of selective solvent of oxidizing compounds, the ionic liquid combined with the organometallic complex of iron(II) with catalytic ionophilic binder of the oxidizing agent, stimulating the reactive phenomenon taking place in the ionic liquid phase, with the effect that the iron remains stable in the ionic liquid phase, without being leached into the oily phase. This measure results in a considerable improvement in removal of the heteroatoms from the hydrocarbon medium.

The present invention describes an extractive oxidation process for removing contaminants from hydrocarbon streams using an ionic liquid combined with an organometallic ionic complex of iron(II), which comprises a complex of iron(II) cation with an ionophilic binder, catalyst of iron(II) with ionophilic binder in its molecular structure, oxidation of which is performed with an oxidizing agent and is catalysed by the organometallic iron(II) complex present in the phase of the ionic liquid.

Besides maintaining its characteristics of selective solvent of oxidizing compounds, the ionic liquid combined with the organometallic complex of iron(II) with catalytic ionophilic binder of the oxidizing agent, stimulating the reactive phenomenon taking place in the ionic liquid phase, with the effect that the iron remains stable in the ionic liquid phase, without being leached into the oily phase. This measure results in a considerable improvement in removal of the heteroatoms from the hydrocarbon medium.

Oxidized disulfide oil (ODSO) solvent compositions are derived from by-product disulfide oil (DSO) compounds produced as by-products from the generalized mercaptan oxidation (MEROX) processing of a refinery feedstock. The oxidized disulfide oil (ODSO) solvent compositions comprise at least a primary oxidized disulfide oil (ODSO) compound selected from either water soluble or water insoluble oxidized disulfide oil (ODSO) compounds and in some embodiments at least 0.1 ppmw of a secondary oxidized disulfide oil (ODSO) compound that is a water soluble oxidized disulfide oil (ODSO) compound.

A nanocomposite composition for oxidative desulfurization of liquid hydrocarbon fuels, is disclosed. The nanocomposite composition comprises an amorphous mesoporous titania-silica (TiO.sub.2SiO.sub.2) nanocomposite oxidative desulfurization (ODS) catalyst-adsorbent, including, a chelating agent, an alcohol, an alkoxides precursor of silica and titania, water, an organic polymer and a textural agent. The nanocomposite ODS catalyst-adsorbent is prepared with the aid of polyethylene glycol (PEG) as directing agent and citric acid (CA) as chelating agent. The PEG increases the specific surface area and average pore diameter of ODS catalyst-adsorbent, which facilitates the diffusion of bulky sulfur compounds into porosities of catalyst and adsorption of oxidized sulfur compounds on the catalyst surface. The citric acid controls the hydrolysis and condensation of titanium precursor, which improves ODS performance of catalyst-adsorbent. Further, the prepared ODS catalyst-adsorbent is a dual function material capable of catalyzing the oxidation sulfur compounds and their removal to an ultra-low level in hydrocarbon fuel.