US 7,547,655 B2
	V-P-Si composite oxide catalyst precursor used for producing maleic anhydride from butance
Renshui Lan, Tianjin (China)
Assigned to New Tianjin T. & D. Co., Ltd., Tianjin (China)
Appl. No. 10/543,807 PCT Filed Jan. 30, 2004, PCT No. PCT/CN2004/000085 § 371(c)(1), (2), (4) Date Apr. 25, 2006, PCT Pub. No. WO2004/067170, PCT Pub. Date Aug. 12, 2004.
Claims priority of application No. 03 1 01937 (CN), filed on Jan. 30, 2003.
Prior Publication US 2006/0241310 A1, Oct. 26, 2006
Int. Cl. B01J 21/02 (2006.01); B01J 27/182 (2006.01); B01J 23/00 (2006.01); B01J 27/198 (2006.01)

U.S. Cl. 502—209  [502/206; 502/214; 502/353]

17 Claims

1. 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.