Low pressure hydroprocessing catalyst
AssigneeExxonMobil Technology and Engineering Company
InventorsYi Du, Bradley D. Wooler, Christine E. Kliewer, Stuart Soled
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Abstract
Methods are provided for forming supported catalyst compositions and/or corresponding intermediate catalyst products. The catalyst compositions have improved activity for hydroprocessing of distillate boiling range feeds under hydroprocessing conditions where the hydrogen partial pressure in the hydroprocessing environment is reduced or minimized. The catalyst compositions can correspond to supported CoMo catalysts. The improved activity for hydroprocessing under lower pressure conditions is unexpectedly achieved by using a plurality of treatments with organic compounds during the catalyst formation process.
Claims15
A method for making a catalyst, comprising:
- depositing a precursor comprising a Group 6 metal, a precursor comprising a Group 9 or Group 10 metal, an acid or a base, and a first organic compound on a support material to form a catalyst precursor;
- heating the catalyst precursor to a temperature of 250° C. to 1000° C. in an atmosphere having an oxygen content of 20 vppm O2 or less during the heating to form an intermediate catalyst product comprising metal carbides of at least one of the Group 6 metal and the Group 9 or Group 10 metal, the intermediate catalyst product having a pore volume of 0.10 cm3/g or higher;
- and
- depositing a secondary organic compound, different from the acid or the base and the first organic compound, and having a boiling point of 250° C. or higher on the intermediate catalyst product to form a catalyst, the secondary organic compound comprising an alcohol, an amine or a combination thereof.
Dependencies are inferred from the claim text.