A singlet oxygen scavenger includes, as an active component, hexyl diethyl amino hydroxy benzoyl benzoate, 1-(4-methoxy phenyl)-3-(4-tert-butyl phenyl)-1, 3-propanedione, terephthalylidene-3, 3′-dicamphor-10, 10′-disulfonate, 2-ethyl hexyl 4-methoxy cinnamate, or 2-ethyl hexyl 2-cyano-3, 3-diphenyl acrylate; or 2-phenyl benzimidazole-5-sulfonic acid, 4, 4′, 4″-[(1, 3, 5-triazine-2, 4, 6-triyl) tris (imino)] trisbenzoic acid tris (2-ethyl hexyl), octyl salicylate, or 3, 3, 5-trimethyl cyclohexyl salicylate; or 2-hydroxy-4-methoxy-5-(sodiooxysulfonyl) benzophenone, drometrizol trisiloxane, 2-hydroxy-4-methoxy benzophenone, or 4-methyl benzylidene camphor.

A singlet oxygen scavenger includes, as an active component, hexyl diethyl amino hydroxy benzoyl benzoate, 1-(4-methoxy phenyl)-3-(4-tert-butyl phenyl)-1, 3-propanedione, terephthalylidene-3, 3′-dicamphor-10, 10′-disulfonate, 2-ethyl hexyl 4-methoxy cinnamate, or 2-ethyl hexyl 2-cyano-3, 3-diphenyl acrylate; or 2-phenyl benzimidazole-5-sulfonic acid, 4, 4′, 4″-[(1, 3, 5-triazine-2, 4, 6-triyl) tris (imino)] trisbenzoic acid tris (2-ethyl hexyl), octyl salicylate, or 3, 3, 5-trimethyl cyclohexyl salicylate; or 2-hydroxy-4-methoxy-5-(sodiooxysulfonyl) benzophenone, drometrizol trisiloxane, 2-hydroxy-4-methoxy benzophenone, or 4-methyl benzylidene camphor.

Methods for preventing, inhibiting, or reducing metal (e.g. mild steel) corrosion in aqueous media utilizing a water-soluble formulation having a polyurea pre-dissolved in a polar aprotic solvent are described. The polyurea contains reacted units of a diisocyanate and a diaminoalkane. The effectiveness of the methods is demonstrated by corrosion inhibition efficiency and corrosion rate of metallic substrates in aqueous acidic environments using the water-soluble formulation.

Methods for preventing, inhibiting, or reducing metal (e.g. mild steel) corrosion in aqueous media utilizing a water-soluble formulation having a polyurea pre-dissolved in a polar aprotic solvent are described. The polyurea contains reacted units of a diisocyanate and a diaminoalkane. The effectiveness of the methods is demonstrated by corrosion inhibition efficiency and corrosion rate of metallic substrates in aqueous acidic environments using the water-soluble formulation.

Ionic liquid containing compositions may be used in the production, recovery and refining of oil and gas. In addition, they may be used to treat cooling water and/or to inhibit and/or prevent corrosion of metals.

Ionic liquid containing compositions may be used in the production, recovery and refining of oil and gas. In addition, they may be used to treat cooling water and/or to inhibit and/or prevent corrosion of metals.

Ionic liquid containing compositions may be used in the production, recovery and refining of oil and gas. In addition, they may be used to treat wastewater and/or to inhibit and/or prevent fouling of contaminants onto surfaces.

Systems and methods for using gellable gravel packing fluids that may comprise polysaccharide gelling agents and gel stabilizers to extend the working temperature range for the polysaccharide gelling agents. A method for placing a gravel pack in a subterranean formation comprising: providing a gravel packing fluid in the form of a linear gel and comprising an aqueous base fluid, a polysaccharide gelling agent, a thermal stabilizer, and a gravel; placing the gravel packing fluid into the subterranean formation; and allowing the gravel packing fluid to form a gravel pack in the subterranean formation.

Systems and methods for using gellable gravel packing fluids that may comprise polysaccharide gelling agents and gel stabilizers to extend the working temperature range for the polysaccharide gelling agents. A method for placing a gravel pack in a subterranean formation comprising: providing a gravel packing fluid in the form of a linear gel and comprising an aqueous base fluid, a polysaccharide gelling agent, a thermal stabilizer, and a gravel; placing the gravel packing fluid into the subterranean formation; and allowing the gravel packing fluid to form a gravel pack in the subterranean formation.

The present invention concerns a stabilising antioxidative composition comprising tris(2-t-butylphenyl) phosphite in the absence of tris(2,4-di-t-butylphenyl) phosphite.