US 6,982,235 B2
Method for regenerating solid catalyst
Junpei Tsuji, Ichihara (Japan); and Toshikazu Ohmae, Kisarazu (Japan)
Assigned to Sumitomo Chemical Company, Limited, Osaka (Japan)
Appl. No. 10/471,421
PCT Filed Mar. 07, 2002, PCT No. PCT/JP02/02102
§ 371(c)(1), (2), (4) Date Sep. 11, 2003,
PCT Pub. No. WO02/072255, PCT Pub. Date Sep. 19, 2002.
Claims priority of application No. 2001-71781 (JP), filed on Mar. 14, 2001.
Prior Publication US 2004/0082800 A1, Apr. 29, 2004
Int. Cl. B01J 20/34 (2006.01); B01J 38/56 (2006.01)
U.S. Cl. 502—31 4 Claims
 
1. A process for regenerating a solid catalyst which has been used for producing propylene oxide through an epoxidation reaction of propylene with an organic peroxide in a reactor packed with the solid catalyst, which comprises allowing a liquid propylene to flow through the catalyst packed in the reactor at a temperature higher by 5° C. or more than the maximum reaction temperature of the epoxidation reaction.