Patent ID: 7544285

Claim:
A catalyst comprising a composition of the general formula, on an oxide basis, (X) b (M) c (Z) d (O) e (I) wherein X represents at least one non-noble Group VIII metal; M represents at least one Group VIb metal; Z represents one or more elements selected from aluminium, silicon, magnesium, titanium, zirconium, boron and zinc; O represents oxygen; one of b and c is the integer 1; and d, e, and the other of b and c each are a number greater than 0 such that the molar ratio of b:c is in the range of from 0.5:1 to 5:1, the molar ratio of d:c is in the range of from 0.1:1 to 50:1, and the molar ratio of e:c is in the range of from 3.6:1 to 108:1; which is prepared by a precipitation process, wherein a refractory oxide material in an amount in the range of from 15 to 40 wt %, on an oxide basis, is precipitated with at least one non-noble Group VIII compound and at least one Group VIb metal compound; and which has an XRD diffraction pattern in which above 2θ=15°, there is a local maximum having a characteristic full width at a half maximum above 2.5° at each of a 2θ value in the range of from 25.5° to 28.0°; a 2θ value in the range of from 33.6° to 34.6°; and a 2θ value in the range of from 59.8° to 62.2°, and there is no reflection or local maximum having a characteristic full width at half maximum of 2.5° or below.