V-P-Si composite oxide catalyst precursor used for producing maleic anhydride from butance
AssigneeNew Tianjin T. & D. Co., Ltd.
InventorRenshui Lan
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Abstract
The present invention provides a catalyst precursor for producing maleic anhydride by oxidizing butane. Said catalyst precursor is prepared by a process comprising partially reducing V+5 to V+4 in a mixture of alcohols consisting of isobutanol and benzyl alcohol in a volume ratio of 2.5-5.0, then adding a phosphoric oxy-acid and an alkylsilicon in turn. The catalyst precursor prepared according to said process has a small pore volume, a relatively high bulk density in an appropriate pore size distribution.
Claims17
A VPSi composite oxide catalyst precursor for preparing a catalyst for the production of maleic anhydride, characterized in that said catalyst precursor has a pore size distribution of:
- more than 90% pores having a pore size of greater than 100 Å, less than 10% pores having a pore size of smaller than 100 Å, and having a pore volume of 0.01-0.10 ml/g.
Dependencies are inferred from the claim text.