Chelant and polar additive containing composition useful in the hydroprocessing of hydrocarbon feedstocks and method of making and use thereof
View Patent ↗A hydroprocessing catalyst composition that comprises a chelant treated metal containing support material having incorporated therein a polar additive. The catalyst composition is prepared by incorporating at least one metal component into a support material followed by treating the metal incorporated support with a chelating agent and thereafter incorporating a polar additive into the chelant treated composition.
1. A method of making a composition, wherein said method comprises:
providing a shaped support;
incorporating a metal-containing solution into said shaped support to provide a metal-incorporated support;
drying said metal-incorporated support to provide a dried metal-incorporated support having a volatiles content in the range of from 1 to 20 wt % LOI;
incorporating a chelating agent into said dried metal-incorporated support to provide a chelant-treated metal-incorporated support, wherein said chelating agent is selected from the group consisting of ethylenediaminetetraacetic acid (EDTA), hydroxyethylenediaminetriacetic acid (HEDTA), and diethylenetriaminepentaacetic acid (DTPA);
drying said chelant treated metal-incorporated support to provide a dried chelant-treated metal-incorporated support having a volatiles content in the range of from 1-20 wt % LOI; and
incorporating a polar additive that is selected from the group of amide compounds having polarity and a dipole moment of at least 0.45 into said dried chelant-treated metal-incorporated support in an amount such that at least 75% of the available pore volume of said dried chelant treated metal-incorporated support is filled with said polar additive, to thereby provide an additive impregnated composition.
2. A method as recited in claim 1 , wherein said additive impregnated composition comprises a Group 9 or Group 10 metal component selected from the group consisting of cobalt and nickel present in an amount in the range of from 0.5 wt. % to 20 wt. %, and a Group 6 metal component selected from the group consisting of molybdenum and tungsten present in an amount in the range of from 5 wt. % to 50 wt. %, wherein the weight percents are based on the weight of the dry support material with the metal component as the element regardless of its actual form.
3. A method as recited in claim 2 , wherein said shaped support comprises a porous refractory oxide selected from the group of refractory oxides consisting of silica, alumina, titania, zirconia, silica-alumina, silica-titania, silica-zirconia, titania-alumina, zirconia-alumina, silica-titania and combinations of two or more thereof; and wherein said shaped support has a surface area (as determined by the BET method) in the range of from 50 m 2 /g to 450 m 2 /g, a mean pore diameter in the range of from 50 to 200 angstroms (Å), and a total pore volume exceeding 0.55 cc/g.
4. A method as recited in claim 3 , wherein at least 80% of the available pore volume of said dried metal-incorporated support is filled with said polar additive.
5. A method as recited in claim 1 , further comprising:
exposing said additive impregnated composition to a gaseous atmosphere containing hydrogen at a partial pressure in the range of from 1 bar to 70 bar and at a temperature ranging upwardly to 250° C. and for a time period in the range of from 0.1 hours to 100 hours to provide a hydrogen treated composition.
6. A method as recited in claim 5 , further comprising:
contacting said hydrogen treated composition with a sulfur-containing composition at a sulfiding temperature in the range of from 150° C. to 450° C. and a sulfiding pressure in the range of from 1 bar to 70 bar.
7. A method as recited in claim 6 , wherein said polar additive is dimethylformamide.