NOVELTY - Method (M1) for hydrotreating polyol feedstock involves: (A) contacting a hydrotreating catalyst with a fuel oil feedstock at the beginning of the reactor catalyst; (B) contacting the hydrotreating catalyst with a polyol feedstock at or near the beginning of the reactor catalyst; and (C) contacting the hydrotreating catalyst with at least one additional polyol feedstock at intervals along the reactor catalyst, where the polyol feedstock is reacted on the catalyst to generate alkanes.    USE - For hydrotreating polyol feedstock to produce alkanes; and for hydrotreating liquefied biomass feedstock to produce alkanes (claimed). The lighter alkanes and hexanes are useful for gasoline fuels.    ADVANTAGE - The method provides improved method for hydrotreating polyol feedstock or liquefied biomass feedstock, with diesel feedstock to produce alkanes, where the method prevents damage to the reactor catalyst, reduces coke production, and converts nearly all of the polyols to alkanes. In order to mitigate potential coking issue and to moderate temperature of catalyst bed while maintaining high conversion for sugar alcohol to hydrocarbon via a hydrotreating process, a diesel feedstock is fed over reactor catalyst with multiple injections of polyol feedstock along reactor. Thus the method and apparatus involve sugar alcohol split injection method. The hydrotreating of mixture of sorbitol and diesel over commercial hydrotreating catalyst produces lighter alkanes and hexanes desirable for gasoline fuels. Additionally, the method can be modified to increase production of high octane methyl-cyclopentane (MCP) instead of n-hexane. Production of MCP dramatically increases the octane value of product, thus commercial quantities of sorbitol are converted to hydrocarbons that can be blended directly into a valuable gasoline stream.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) method (M1a) for hydrotreating liquefied biomass feedstock involving: liquefying biomass to generate a polyol feedstock, and the steps (A), (B) and (C); and    (2) a hydrotreating reactor with catalyst comprising: a hydrotreating reactor with hydrotreating catalyst; a fuel oil feedstock injector at the beginning of the reactor catalyst; a polyol feedstock injector at or near the beginning of the reactor catalyst; and at least one additional polyol feedstock injector at intervals along the reactor catalyst, where the polyol feedstock is reacted on the catalyst to generate alkanes.    DESCRIPTION OF DRAWING(S) - The figure shows hydrotreating process for sugar alcohols to hydrocarbons.