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:
Jul. 19, 2005
Filed:
Feb. 05, 2003
Toru Saito, Toda, JP;
Chikanori Nakaoka, Toda, JP;
Toru Saito, Toda, JP;
Chikanori Nakaoka, Toda, JP;
Japan Energy Corporation, Tokyo, JP;
Abstract
A method for producing a hydrorefining catalyst is used to produce the hydrorefining catalyst which contains an inorganic oxide carrier and a hydrogenation-active metal and which has such a bimodal pore characteristic that pores having pore diameters of not more than 50 nm have a pore volume of not less than 0.4 cm/g, pores having pore diameters of not less than 50 nm have a pore volume of not less than 0.2 cm/g, and pores having pore diameters of not less than 1000 nm have a pore volume of not more than 0.1 cm/g. The method comprises the steps of mixing and forming a pseudo-boehmite powder having a dispersibility index of 0.13 to 0.28, and calcinating the formed pseudo-boehmite under a condition in which the pseudo-boehmite is converted into γ-alumina. The hydrorefining catalyst, which has the bimodal pore characteristic, can be produced easily at low cost.