ULTRADISPERSED CATALYST COMPOSITIONS AND METHODS OF PREPARATION

摘要

The present invention relates generally to ultradispersed bimetallic and trimetallic catalyst compositions and methods for preparing such catalysts. The bimetallic catalyst composition has a general formula: B<SUB>x</SUB>M<SUB>y</SUB>S<SUB>[(1.1 to 46)y + (0.5 to 4)]</SUB>, where B is a Group VIII non-noble metal, M is a Group VIB metal, and 0.05=y/x= 15. The trimetallic catalyst composition has a general formula: B<SUB>x</SUB>Ml<SUB>y</SUB>M2<SUB>z</SUB>O<SUB>(2 to 3)z</SUB>S<SUB>[(0.3 to 2)y + (0.5 to 4)x]</SUB>, where B is a Group VIII non-noble metal, Ml & M2 are Group VIB metals, 0.05=y/x=15 and l=z/x=14. Separate microemulsions are initially prepared by mixing precursor solutions containing Group VIII metal salt with a hydrocarbon feedstock and Group VI metal salts with a sulphurizing agent and the hydrocarbon feedstock. The separate microemulsions are then mixed to form a microemulsion mixture containing the ultradispersed bimetallic or trimetallic sulphide catalyst.