Patent ID: 8575062
Filing Date: 2013-11-05
Classification: B01J,C10G

Abstract:
1. A process for forming a bulk hydroprocessing catalyst, the method comprises: co-precipitating at reaction conditions at least a Group VIB metal precursor feed and at least a Promoter metal precursor feed selected from Group VIII, Group IIB, Group IIA, Group IVA and combinations thereof, to form a product mixture comprising a first catalyst precursor and a first supernatant containing at least a Promoter metal residual and at least a Group VIB metal residual in an amount of at least 10 mole % of the metal precursor feeds, wherein the reaction conditions comprise a temperature between 25-350° C. and a pressure between 0 to 3000 psig and a pH of 0-12; adding at least a precipitant to the product mixture at a molar ratio of precipitant to metal residuals ranging from 1.5:1 to 20:1 to precipitate at least 50 mole % of metal ions in the residuals forming additional catalyst precursor; isolating the catalyst precursors from the product mixture, forming a second supernatant containing less than 5000 ppm of metal ions in the metal residuals; and sulfiding the catalyst precursors forming the bulk catalyst.