Process for preparing fraction oil hydrogenation treatmnt catalyst

Abstract

The preparation process of fraction oil hydrogenation treatment catalyst includes assistant adding modification of gamma-alumina precursor and subsequent conventional preparation process. The fraction oil hydrogenation treatment catalyst includes gamma-alumina precursoe prepared through carbonation process, aluminum nitrate process, aluminum sulfate process or aluminum chloride process; F an / or Bas assistant and W and Ni as active component. Compared with available technology, the present invention has the advantages of simple preparation process, low cost, low power consumption, and excellent catalyst performance. The catalyst of the present invention is suitable for hydrogenation treatment of 130-390 deg.c fraction oil.

Description

1. Technical field [0001] The invention belongs to the technical field of catalyst preparation for petroleum refining, and in particular relates to a preparation method of a distillate oil hydrotreating catalyst, and is particularly suitable for the preparation method of a hydrotreating catalyst for petroleum fractions with a distillation range of 130-390°C. 2. Background technology [0002] The commonly used support or substrate for hydrogenation catalysts is γ-alumina. The properties of γ-alumina play a very important role in the whole catalyst. At present, the preparation methods of γ-alumina usually include nitric acid method, aluminum trichloride method and aluminum sulfate method. In order to achieve a better application effect, distillate oil hydrogenation catalysts usually contain a certain amount of additives in addition to the alumina carrier and active metal components, and the type, content and addition method of the additives will affect the performance of the ...

AI Technical Summary

Problems solved by technology

From this it can be seen that the catalyst prepared by this method has at least the following disadvantages: 1) the use of bulk tungsten and aluminum compounds to impregnate the system catalyst will greatly increase the metal consumption, thereby causing the catalyst cost to increase

2) During the preparation process of the catalyst, all the solvents of the tungsten and aluminum compounds need to be evaporated to dryness, and at the same time, a long drying and roasting process is required, which leads to the disadvantages of increased catalyst preparation cost and long cycle

The main problem is that the additives are added to the catalyst through the co-precipitation method. On the one hand, it is unfavorable for the catalyst to form a suitable pore structure. In addition, the additives are mainly in the bulk phase and cannot fully play the role of adjusting the surface properties of the catalyst.