Disclosed are compositions including up to 20 wt % of a paraffin inhibiting polymer and one or more non-polymeric glycol ether compounds, wherein the compositions are stable and flow at a temperature between about 0 C. and 40 C., in many cases between about 20 C. and 40 C. The glycol ether compounds are non-polymeric, are liquids at 20 C. (1 atm) and have boiling points over 100 C., in many cases over 200 C. The compositions are useful paraffin inhibitor concentrates for use in the petroleum industry wherein the concentrates are stable, pumpable, and pourable at temperatures as low as 40 C. and as high as 60 C.

Disclosed are compositions including up to 20 wt % of a paraffin inhibiting polymer and one or more non-polymeric glycol ether compounds, wherein the compositions are stable and flow at a temperature between about 0 C. and 40 C., in many cases between about 20 C. and 40 C. The glycol ether compounds are non-polymeric, are liquids at 20 C. (1 atm) and have boiling points over 100 C., in many cases over 200 C. The compositions are useful paraffin inhibitor concentrates for use in the petroleum industry wherein the concentrates are stable, pumpable, and pourable at temperatures as low as 40 C. and as high as 60 C.

Fouling in a hydrocarbon refining process is reduced by adding to a crude hydrocarbon for a refining process, an additive combination including: (A) a polyalkenyl-substituted carboxylic acid or anhydride, and (B) an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent,
where the mass:mass ratio of (A) to (B) is in the range of 10:1 to 1:10, and the treat rate of the additive combination is in the range of 5 to 1000 ppm by mass.

Fouling in a hydrocarbon refining process is reduced by adding to a crude hydrocarbon for a refining process, an additive combination including: (A) a polyalkenyl-substituted carboxylic acid or anhydride, and (B) an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent,
where the mass:mass ratio of (A) to (B) is in the range of 10:1 to 1:10, and the treat rate of the additive combination is in the range of 5 to 1000 ppm by mass.

Low sulfur marine fuel compositions and methods for making the same are provided. The compositions exhibit a sulfur content of at most 0.50 wt. %, a solvent power of at least 0.30, and a P-value of at least 1.15.

The disclosure describes refinery processes and process units for suppressing the precipitation and deposition of heavy polynuclear aromatic (HPNA) compounds in a process unit of a refinery, by combining the effluent from a hydrocracking unit with an aromatic solvent stream. Certain costly HPNA treatment processes can be eliminated, downtime can be reduced, and overall distillate yield can be increased by suppressing HPNA precipitation. The aromatic bottomswhich are suitable solvents for this purposeof an aromatic recovery complex can be used in certain embodiments to dissolve HPNAs and suppress HPNA precipitation.

The disclosure describes refinery processes and process units for suppressing the precipitation and deposition of heavy polynuclear aromatic (HPNA) compounds in a process unit of a refinery, by combining the effluent from a hydrocracking unit with an aromatic solvent stream. Certain costly HPNA treatment processes can be eliminated, downtime can be reduced, and overall distillate yield can be increased by suppressing HPNA precipitation. The aromatic bottomswhich are suitable solvents for this purposeof an aromatic recovery complex can be used in certain embodiments to dissolve HPNAs and suppress HPNA precipitation.

The disclosure relates to an anti fouling composition including a metallic component comprising of at least one alkali metal salt and a non-metallic component and method for preparation of anti fouling composition. The disclosure also relates to a process of reducing fouling in reactors or furnaces using said composition.

The disclosure relates to an anti fouling composition including a metallic component comprising of at least one alkali metal salt and a non-metallic component and method for preparation of anti fouling composition. The disclosure also relates to a process of reducing fouling in reactors or furnaces using said composition.

A microfluidic device for evaluation of an organic/inorganic scale inhibitor is provided. The device comprises a substrate mountable to a disc for rotation about an axis. The device further comprises a proximal end and a distal end. The substrate defines a sample reservoir, a solvent reservoir, an inhibitor reservoir, and a precipitant reservoir at the proximal end and an analysis chamber at the distal end in fluid communication with the sample, solvent, inhibitor, and precipitant reservoirs. The substrate is constructed to direct one or more of fluids in the sample reservoir, solvent reservoir, inhibitor reservoir, and precipitant reservoir radially outwardly towards the analysis chamber under the influence of centrifugal force when the microfluidic device rotates.