Invention Grant
- Patent Title: Sulfur resistant cladded titania—alumina supports
- Patent Title (中): 耐硫覆盖的二氧化钛 - 氧化铝载体
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Application No.: US13498609Application Date: 2010-10-01
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Publication No.: US09409149B2Publication Date: 2016-08-09
- Inventor: Manoj Mukund Koranne , David Chapamn
- Applicant: Manoj Mukund Koranne , David Chapamn
- Applicant Address: US MD Columbia
- Assignee: W. R. GRACE & CO.-CONN.
- Current Assignee: W. R. GRACE & CO.-CONN.
- Current Assignee Address: US MD Columbia
- Agent Charles A. Cross
- International Application: PCT/US2010/051072 WO 20101001
- International Announcement: WO2011/043995 WO 20110414
- Main IPC: B01J21/04
- IPC: B01J21/04 ; B01J21/06 ; B01J23/10 ; B01J23/40 ; B01J35/00 ; B01J35/02 ; B01J35/10 ; B01J37/00 ; B01J37/02 ; B01J37/03 ; C01F7/02 ; B01D53/94

Abstract:
The present invention is directed to a method of forming titania clad high surface area alumina suitable as a support for forming noble metal catalysts. The resultant catalysts exhibit resistance to poisoning by sulfurous materials and, therefore, are useful in applications directed to internal combustion engine emission conversion and the like. The present invention provides a commercially feasible and cost effective method of forming a highly desired support for noble metal catalyst application. The process comprises forming a slurry of porous alumina particulate suitable as a catalyst support for the intended application, mixing said slurry with a solution of titanyl sulfate having a pH of about 1, increasing the pH of the mixed slurry/solution at a slow rate of from 0.05 to 0.5 pH unit per minute to a pH of ≦4 by the addition of a basic solution, allowing the resultant slurry to age for a period of from 10 to 120 minutes, separating the treated porous alumina particulates and washing same free of sulfate with a weak base, drying and calcining said particulates to produce titania clad alumina particulate product. The resultant material exhibits a normalized sulfur uptake of less than about 45 μg/m2-sample. Such material can subsequently be coated with a noble metal to form the catalyst material.
Public/Granted literature
- US20120190541A1 SULFUR RESITANT CLADDED TITANIA-ALUMINA SUPPORTS Public/Granted day:2012-07-26
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