zone by the flow of the fluid feed through the reaction zone and the solid particles are substantially free to move about within the reaction zone as driven by the flow of the fluid feed through the reaction zone as used herein the term u201c fluid u201d denotes gas liquid vapor and combinations thereof generally the reaction conditions at which the reaction zone is maintained generally include a temperature in the range of from about 260 u00b0 c to about 430 u00b0 c preferably the temperature is in the range of from about 310 u00b0 c to about 370 u00b0 c in accordance with the present invention regardless of whether a fixed or fluidized bed reactor is used the pressure is generally in the range of from about 100 pounds per square inch gauge psig to about 2000 psig generally in a fixed bed reactor the pressure is in the range of from about 100 psig to about 1500 psig in a fixed bed reactor the pressure can also be about 600 psig in a fluidized bed reactor the pressure is generally in the range of from about 400 psig to about 750 psig and can also be about 500 psig the following examples are presented to further illustrate the present invention and are not to be construed as unduly limiting the scope of this invention a mixture of soybean oil and diesel was fed into a heated tube operated at a temperature of about 330 u00b0 c and a pressure of 700 psig there was no co feed gas present the mixture was then passed through a filter and sent to a hydrotreating reactor containing.