Asphaltene stabilization in petroleum feedstocks by blending with biological source oil and/or chemical additive

摘要

Biological source oils, including, but not limited to, algae oil, stabilize the presence of asphaltenes in petroleum feedstocks, such as crude oil, to help avoid or prevent problematic issues caused by the asphaltenes, such as sludges, plugging, deposits, fouling and/or corrosion in the production, transferring and processing of the petroleum feedstocks. Chemical additives such as phenol-based resins, and reaction products or combinations of long chain alpha-olefins and/or small chain aldehydes and/or long chain alkyl phenate sulfides and/or metal oxide-based colloidal hydrocarbon-based nanodispersions, may also stabilize the presence of asphaltenes in petroleum feedstocks. By “stabilizing” is meant keeping the asphaltenes in solution in the petroleum feedstocks.

主权项

1. A method for stabilizing asphaltenes in a petroleum feedstock comprising:
adding to the petroleum feedstock containing asphaltenes an effective amount to improve the stability of asphaltenes in the petroleum feedstock of:
at least one biological source oil, where the biological source oil is selected from the group consisting of algae oils, fish oils, krill oils, flaxseed oils, biocrude, and mixtures thereof; andat least one chemical additive to improve the stability of asphaltenes in the petroleum feedstock, where the chemical additive is selected from the group consisting of:
alkylphenol-based resins, where the alkyl group is selected from the group consisting of octyl, nonyl, and dodecyl, where an alkylphenol is reacted with an aldehyde in the presence of a sulphonic acid, where the alkyl-phenol based resins are used alone or in conjunction with amines,long chain alpha-olefins having more than 20 carbon atoms reacted with an aldehyde,long chain alkyl phenate sulfides having from 8 to 40 carbon atoms reacted with polyolefins,metal oxide-based colloidal hydrocarbon-based nanodispersions, andcombinations of these chemical additives;where the asphaltenes are synergistically stabilized in the petroleum feedstock which is defined as to an extent that is greater than the additive of:
the stabilizing achieved with only the same amount of the biological source oil used separately, added to the stabilizing achieved with only the same amount of the chemical additive used separately.