Selection of bright stock processing conditions based on sample characterization

A method for forming a bright stock, comprising:

• performing FTICR on a sample of a feedstock to determine amounts of one or more Z-classes within the feedstock, to determine amounts of one or more homologous series of compounds within the feedstock, or a combination thereof;
• characterizing waxy components within the feedstock based on the one or more determined Z-classes, the determined one or more homologous series of compounds, or the combination thereof;
• selecting at least one processing condition based on the characterization of the waxy components;
• and
• performing catalytic dewaxing on at least a portion of the feedstock under catalytic dewaxing conditions to form a dewaxed oil, the catalytic dewaxing conditions comprising the at least one processing condition, the dewaxed oil comprising a bright stock portion having a kinematic viscosity at 100° C. of 20 cSt or more.

A method for de-oiling a wax formed during solvent dewaxing, comprising:

• performing FTICR on a sample of a feedstock to determine amounts of one or more Z-classes within the feedstock, to determine amounts of one or more homologous series of compounds within the feedstock, or a combination thereof;
• characterizing waxy components within the sample of the feedstock based on the one or more determined Z-classes, the determined one or more homologous series of compounds, or the combination thereof;
• performing solvent dewaxing on at least a portion of the feedstock under solvent dewaxing conditions to form a dewaxed oil and a wax product, the dewaxed oil comprising a bright stock portion having a kinematic viscosity at 100° C. of 20 cSt or more;
• selecting at least one of a feed rate, a de-oiling temperature, a solvent to oil ratio, and a dewaxing solvent based on the characterization of the waxy components;
• and
• performing solvent de-oiling on the wax product under solvent de-oiling conditions to form de-oiled wax and an oil phase product, the solvent de-oiling conditions comprising the at least one of the feed rate, the de-oiling temperature, the solvent to oil ratio, and the dewaxing solvent.