Highly stable hydrocarbon-soluble molybdenum catalyst precursors and methods for making same

摘要

Hydrocarbon-soluble molybdenum catalyst precursors include a plurality of molybdenum cations and a plurality of carboxylate anions having at least 8 carbon atoms. The carboxylate anions are alicyclic, aromatic, or branched, unsaturated and aliphatic, and can derived from carboxylic acids selected from 3-cyclopentylpropionic acid, cyclohexanebutyric acid, biphenyl-2-carboxylic acid, 4-heptylbenzoic acid, 5-phenylvaleric acid, geranic acid, 10-undecenoic acid, dodecanoic acid, and combinations thereof. The molybdenum salts have decomposition temperatures higher than 210° C. The catalyst precursors can form a hydroprocessing molybdenum sulfide catalyst in heavy oil feedstocks. Also disclosed are methods for making catalyst precursors and hydrocracking heavy oil using active catalysts.

主权项

1. A molybdenum catalyst precursor composition comprising:
a molybdenum catalyst precursor composed of:
a plurality of molybdenum atoms; anda plurality of carboxylate anions coordinated with each molybdenum atom and selected from the group consisting of: (a) aromatic carboxylate anions with one or two unfused aromatic rings and a total of 11 to 15 carbon atoms, (b) alicyclic carboxylate anions with a single aliphatic ring, an aliphatic side chain, and a total of 8 to 17 carbon atoms, (c) saturated aliphatic carboxylate anions with 11 to 15 carbon atoms, (d) unsaturated aliphatic carboxylate anions with 8 to 17 carbon atoms, and mixtures thereof;with the proviso that the plurality of molybdenum atoms in the molybdenum catalyst precursor have an average oxidation state in a range of 4+ to 6+ and the molybdenum catalyst precursor is soluble in heavy oil, has a first decomposition temperature of at least 210° C. and has a peak decomposition temperature of at least 250° C.