Hydrotreating catalyst

Claim 2

The composition of claim 1 having an equivalent MoO3 concentration of about 17 to about 30 wt. percent and an equivalent nickel or cobalt oxide concentration of about 1 to about 8 wt. percent.

Claim 3

The composition of claim 1 wherein said acid of phosphorus is orthophosphoric acid, and said molybdenum compound is selected from molybdic acid, molybdenum trioxide, ammonium heptamolybdate, ammonium phosphomolybdate and molybdenum blue.

Claim 4

The composition of claim 4 wherein said compound of nickel or cobalt is selected from the nitrates, sulfates, hydroxides, carbonates, fluorides, chlorides and bromides of nickel and cobalt.

Claim 5

The composition of claim 5 wherein said P/MoO3 ratio is from about 0.12 to 0.23 and the pH of said solution is within the range of about 1.2 to about 1.8.

Claim 6

The stable aqueous solution which forms on admixing at least one molybdenum source selected from ammonium heptamolybdate, ammonium phosphomolybdate, molybdic acid, molybdenum trioxide and molybdenum blue, a water soluble Group VIII metal compound of nickel or cobalt, and orthophosphoric acid with water in amounts corresponding to 17 to about 30 wt.% MoO3, 2 to about 10 wt. percent of the corresponding Group VIII metal oxide, and a P/MoO3 weight ratio of about 0.1 to about 0.25, said solution having a pH of about 1 to about 2.

Claim 8

The method of claim 8 wherein said Group VIII metal is selected from nickel and cobalt and said acid of phosphorus is selected from orthophosphoric, metaphosphoric, pyrophosphoric and phosphorous acids.

Claim 9

The method of claim 8 wherein said Group VIII metal compound is selected from the nitrates, sulfates, hydroxides, carbonates, fluorides, chlorides and bromides of nickel and cobalt and said molybdenum compound is selected from ammonium heptamolybdate, ammonium phosphomolybdate, molybdic acid, molybdenum trioxide and molybdenum blue.

Claim 10

The method of claim 8 wherein said molybdenum compound is ammonium heptamolybdate, said Group VIII compound is selected from the nitrates hydroxides, carbonates, sulfates, fluorides, chlorides and bromides of nickel and cobalt, said acid of phosphorus is orthophosphoric acid and said carrier comprises one of silica and alumina.

Claim 12

The catalytic composition prepared by the method including the steps of impregnating a foraminous support with the aqueous inpregnating medium which formS an admixture of at least one molybdenum compound selected from ammonium heptamolybdate, molybdic acid, molybdenum trioxide and molybdenum blue, at least one water soluble Group VIII metal compound selected from the sulfates, nitrates, fluorides, chlorides, bromides, carbonates and hydroxides of cobalt and nickel and an acid of phosphorus with water in proportions equivalent to about 10 to about 30 weight-percent MoO3, about 1 to about 10 wt. percent of the corresponding Group VIII metal oxide, and a P/MoO3 weight ratio of about 0.1 to about 0.25, and calcining the resulting composite in an oxidizing atmosphere, wherein the pH of said solution is below about 2.

Claim 13

The composition of claim 13 wherein said Group VIII metal compound is present in said impregnating medium in an amount corresponding to about 2 to about 8 weight percent of the corresponding metal oxide, said molybdenum compound is ammonium heptamolybdate, said acid of phosphorus is orthophosphoric acid and the concentration of said molybdenum compound corresponds to about 17 to about 24 wt.% MoO3.

Claim 14

The catalytic composition of claim 13 having an equivalent MoO3 content of about 5 to about 40 wt. percent, an equivalent Group VIII metal oxide content of about 1 to about 10 wt. percent and a P/MoO3 ratio of about 0.12 to about 0.25 and wherein said support contains silica or alumina.

Claim 15

The composition of claim 13 wherein said impregnated carrier is aged in contact with said medium prior to drying for at least about 30 minutes.

Claim 16

The composition of claim 13 having the equivalent oxide concentration of 10 to 20 wt.% MoO3 and a P/MoO3 ratio of 0.12 to 0.25.

Claim 17

The composition prepared by the method including the steps of impregnating a foraminous carrier with the solution which forms upon the admixture of water and ammonium heptamolybdate in amounts equivalent to about 17 to about 30 wt.% MoO3, at least one Group VIII compound selected from the nitrates, hydroxides, carbonates, chlorides and sulfates of nickel and cobalt in total amounts corresponding to about 2 to about 8 wt. percent of the corresponding oxides, and orthophosphoric acid in an amount sufficient to provide a P/MoO3 ratio of about 0.1 to about 0.25 in said solution and calcining the resultant impregnated carrier, the pH of said solution initially contacted with said carrier being below about 2.

Claim 18

The composition of claim 18 wherein said salt of said Group VIII compound is selected from nickel nitrate and cobalt nitrate and said foraminous support is aged in contact with said solution for at least 30 minutes.

Claim 19

A catalyst prepared by the method including the steps of impregnating an alumina containing support with a solution formed on the admixture of water and at least one molybdenum compound selected from ammonium heptamolybdate, molybdic acid, molybdenum trioxide and molybdenum blue in amounts sufficient to provide an equivalent MoO3 concentration of about 17 to about 30 wt. percent, at least one Group VIII compound selected from the nitrates, hydroxides, carbonates, sulfates, fluorides, chlorides and bromides of nickel and cobalt in amounts corresponding to about 2 to about 8 wt. percent of the equivalent oxide, and orthophosphoric acid in amounts sufficient to provide a P/MoO3 weight ratio of from about 0.1 to about 0.25 in said solution at a temperature and for a period of time sufficient to produce a catalyst having an equivalent MoO3 content of about 5 to about 40 wt. percent, an equivalent nickel and/or cobalt oxide content of from about 1 to about 10 wt. percent, and a P/MoO3 weight ratio of from about 0.12 to about 0.25 and calcining the thus impregnated support, wherein the pH of said solution initially contacted with said support is below about 2.