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

Claim 19:
20. A pre-treatment catalyst of acidic raw materials, wherein the pre-treatment catalyst comprises a solid acidic catalyst of sulfated zirconia/cerium or sulfated zirconia/cerium/titanium, with mass ratio Ce/Zr from 0.2 to 0.10 or Ti/Zr of 0.05 to 0.50, specific area of between 70 and 120 m2/g, pore diameter between 40 and 80 Å, acidic strength between 0.9 and 1.5 ((μmol NH3/gcat)/(μmol C3H6/gcat)), acidic site density between 0.7 to 2.0 (μmol NH3/m2), sulfur content between 1.0 to 5.0% m/m, and is obtained in the method as defined in claim 1, wherein the solid acidic catalyst is used in esterification reactions with fatty acids, mixtures of fatty acids and triglycerides, a mixture of alcohol and fatty acids, a mixture of alcohol and bio-oil, or bio-oil, in batch, in fed batch, or in continuous mode, in a fixed bed reactor, wherein the bio-oil comes from processes of pyrolysis of plant biomass in the absence of oxygen, with temperatures between 400 and 550° C.