| 摘要 |
Propylene is converted to acrylic acid and acrolein using a catalyst having active ingredients in ratios Mo10 Te1- 10 Mn2- 20 P2- 20 O39- 120 on a silica-containing support which may be "Celite" (Registered Trade Mark), silica gel having surface area not more than 260 m.2/gm., colloidal silica, silica-alumina containing about 87% silica. The preparation of the catalyst is described in Division B1.ALSO:A catalyst having as active ingredients Mo10 Te1-10 Mn2-20 P2-20 O39-120 on a silica-containing support which constitutes from 35% to 85% by weight of finished catalyst is prepared by a process comprising (a), preparing an aqueous slurry of support material and a water soluble molybdenum compound; (b), preparing an aqueous slurry of support material and a water soluble tellurium salt; (c), preparing an aqueous slurry of support material and an aqueous solution of a manganese salt and sufficient phosphoric acid to form a phosphate with the manganese; (d), combining the slurries formed in steps (b) and (c) and combining the resulting mixture with the slurry formed in step (a); (e), drying the catalyst; and (f), calcining at a temperature of 350 DEG C to 550 DEG C. The support may be colloidal silica, silica gel having surface area not greater than 260 sq. m./gm, silica-alumina containing 10%-30% alumina, diatomaceous earth, kieselguhr or clay. Supports exemplified are Celite (Registered Trade Mark), silica gel, silica-alumina having about 13% alumina, colloidal silica. |
