Process to obtain diesel from vegetable and animal oils through a hydrotreatment with short residence time and byproducts obtained from it

摘要

A method for obtaining diesel fuel from vegetable or animal oils through the addition of hydrogen in the presence of catalysts under suitable temperature and pressure conditions is described. The method is different from other similar methods in that it involves the use of space velocities of between 5.1 h-1 and 9 h-1, thereby enabling a reduction in the size of the reactor and in hydrogen consumption, as well as lowering construction and operating costs. The invention also relates to the products obtained using said method, which have demonstrated that in additions, even below 10%, they improve the performance of diesel engines, thereby lowering fuel consumption.

主权项

1. A process to produce diesel from vegetable or animal oils by a hydrotreatment process comprising the following steps:
a. combining hydrogen with pure vegetable or animal oil or with a combination of hydrocarbons and vegetable oil or animal oil to produce a mixture; b. heating up the mixture of step a in a furnace at a reaction temperature between 280° C. and 450° C. (536° F. to 842° F.); c. passing the mixture from step b through a reactor filled with a catalyst composed of a porous solid material containing active metallic sulphurs deposited on its surface to effect a hydrotreatment reaction at a temperature between 280° C. and 450° C. (536° F. to 842° F.), pressure between 5.0 MPa and 15 MPa, space velocity between 5.1 h−1 and 9.0 h−1, and a ratio of hydrogen per oil load between 178 NL of H2 per liter of oil and 534.3 NL of H2 per liter of oil; and d. recovering the product from the previous step in closed containers and separating it by decantation into 3 phases: water, oil, and gasses.