| abstract |
Disclosed herein are processes for preparing an α,ω-C n -diol, wherein n is 5 or greater, from a feedstock comprising a C n oxygenate. In one embodiment, the process comprises contacting the feedstock with hydrogen gas in the presence of a catalyst comprising a first metal component comprising Ni, Ir, Pt, Rh, Ru, Pd, Fe, Ag, or Au; a heteropoly acid component comprising H 3 [P(W 3 O 10 ) 4 ], H 4 [Si(W 3 O 10 ) 4 ], H 4 [P(Mo 3 O 10 ) 4 ], H 4 [Si(Mo 3 O 10 ) 4 ], Cs 2 .5H 0.5 [P(W 3 O 10 ) 4 ] Cs 2.5 H 0.5 [Si(W 3 O 10 ) 4 ], or mixtures thereof; optionally a second metal component comprising Cr, a Cr oxide, Ni,a Ni oxide, Fe, a Fe oxide, Co, a Co oxide, Mn, a Mn oxide, Mo, a Mo oxide, W, a W oxide, Re, a Re oxide, Zn, a Zn oxide, SiO 2 , or AI 2 O 3 ; optionally at least one promoter comprising Na, K, Mg, Rb, Cs, Ca, Sr, Ba, Ce, or mixtures thereof; and optionally a support. In one embodiment, the optional support is present in the catalyst and comprises WO 3 , SiO 2 , AI 2 O 3 , carbon, TiO 2 , ZrO 2 , SiO 2 -AI 2 O 3 , montmorillonite, SiO 2 -TiO 2 , tungstated ZrO 2 , zeolites, V 2 O 5 , MoO 3 , or mixtures thereof. The C n oxygenate may be obtained from a biorenewable resource. |