US4981830A
Expired / Lapsed
US
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Process for preparing iron-antimony-phosphorus-containing catalyst for fluidized bed process
Assignee: Mitsubishi Chemical Corp
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Filing: 1988-12-27
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Granted: 1991-01-01
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Expires: 2008-12-27
Abstract
Abstract A process for preparing a metal oxide catalyst for a fluidized bed process, which comprises adjusting the pH of an aqueous slurry containing an iron compound, an antimony compound, a phosphorus compound, and a silica carrier material as essential elements, with the atomic ratio of phosphorus to antimony being at least 0.1:1, to a pH of 3 or less, spray drying the slurry, and calcining the resulting particles; which catalyst exhibits excellent activity and physical properties suitable for use in a fluidized bed process and can be obtained with good reproducibility.
Inventors
- 👤 Yutaka Sasaki
- 👤 Hiroshi Utsumi
- 👤 Masato Otani
- 👤 Kazuo Morishita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:03
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/02; C01C3/0208; C01C3/0241; B; B01; B01J; B01J27/00; B01J27/14; B01J27/185; B01J27/1853; B01J27/186; B01J27/188
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
81 words
A process for preparing a metal oxide catalyst of high attrition resistance for a fluidized bed process, which comprises adjusting the pH of an aqueous slurry containing an iron compound, an antimony compound, a phosphorus compound, and a silica carrier material, with the atomic ratio of phosphorus to antimony being at least 0.1:1, to a pH of 3 or less, spray drying the slurry, and calcining the resulting particles to a final temperature of about 500° C. to about 900° C.
Claim 2
Dependent Claim
81 words
A process for preparing a metal oxide catalyst of high attrition resistance for a fluidized bed process, which comprises adjusting the pH of an aqueous slurry containing an iron compound, an antimony compound, a phosphorus compound, and a silica carrier material, with the atomic ratio of phosphorus to antimony being at least 0.1:1, to a pH of 3 or less, spray drying the slurry, and calcining the resulting particles to a final temperature of about 500° C. to about 900° C.
Claim 3
Dependent Claim
216 words
The process as claimed in claim 1, wherein said catalyst has a composition represented by the empirical formula: Fe.sub.a Sb.sub.b P.sub.c X.sub.d Q.sub.e R.sub.f O.sub.g (SiO.sub.2).sub.h wherein X represents at least one element selected from the group consisting of V, Mo, and W; Q represents at least one element selected from the group consisting of Li, Na, K, Cs, Be, Mg, Ca, Sr, Ba, Sc, Y, La, Ce, Pr, Nd, Sm, Th, U, Ti, Zr, Hf, Nb, Ta, Cr, Mn, Re, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt, Cu, Ag, Au, Zn, Cd, Hg, Al, Ga, In, Tl, Ge, Sn, and Pb; R represents at least one element selected from the group consisting of B, As, Bi, Se, and Te; and a, b, c, d, e, f, g, and h each represents the atomic ratio of the respective element for which they are subscripts, wherein a is from 5 to 15; b is from 5 to 100; c is from 1 to 30; d is from 0 to 10; e is from 0 to 15; f is from 0 to 10; g represents a number of oxygen corresponding to oxides formed by the combination of the above-mentioned components; and h is from 10 to 200; provided that the P/Sb atomic ratio is at least 0.1:1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |