The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 2009
Filed:
Nov. 08, 2002
Isao Teshigahara, Mie, JP;
Nariyasu Kanuka, Mie, JP;
Tomoatsu Iwakura, Mie, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
A composite oxide catalyst for the oxidation of an olefin containing Mo and Bi as essential components, characterized in that it has a specific surface area of 5 to 25 m/g and a pore volume of 0.2 to 0.7 cc/g, and has a pore diameter distribution wherein the volume of the pores having a pore diameter of 0.03 to 0.1 μm accounts for 30% or more of the total pore volume, the volume of the pores having a pore diameter of 0.1 to 1 μm accounts for 20% or more of the total pore volume, and the volume of the pores having a pore diameter of less than 0.03 μm is 10% or less of the total pore volume; a composite oxide catalyst for use in the vapor phase catalytic oxidation of acrolein or methacrolein or the like which comprises Mo, Bi and a halogen; either of the above two composite oxide catalysts which comprises Mo, Bi, Fe, Si and an element selected from alkali metals and thallium, and optionally Co, Ni, Mg, Ca, Zn, Ce, Sm, a halogen, B, P, As and W; a method for preparing any of the above composite catalysts; and a method for using any of the above composite oxide catalysts.