Patent ID: 11944955
Assignee: PETRÓLEO BRASILEIRO S.A.—PETROBRAS
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 9:
10. A method of obtaining a pre-treatment catalyst of acidic raw materials, the method comprising:
precipitating zirconium hydroxide using a source of zirconium and a base to form a solution;
adding a porogen to the solution;
stirring, aging, filtering, and drying the solution to produce a dry material;
adding a source of cerium and a source of sulfur over the dry material to produce a material mixture, wherein adding the source of cerium and the source of sulfur is carried out by a method selected from wet spot impregnation, mud impregnation or chemical vapor phase deposition, and
calcinating the material mixture;
optionally, wherein adding the porogen occurs while adding the source of cerium and the source of sulfur prior to calcinating the material mixture; and
optionally, wherein the method further comprises adding a source of titanium in the form of titanium oxysulfate when adding the source of sulfur and the source of cerium prior to calcinating the material mixture.