US4388288A
Expired / Lapsed
US
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Preparation of shaped titanium dioxide catalyst/carrier and catalysis of gaseous sulfur compounds therewith
Assignee: Rhone Poulenc Industries SA
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Filing: 1981-04-23
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Granted: 1983-06-14
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Expires: 2001-04-23
Abstract
Abstract Shaped titanium oxide catalysts/carriers useful, e.g., for sulfur recovery via Claus catalysis, are prepared by (i) intimately admixing powdered, poorly crystalline and/or amorphous titanium oxide, said titanium oxide powder being characterized by a weight loss on ignition ranging from 1 to 50%, water and from 0 to about 15% by weight of a shaping additive, (ii) next shaping the intimate admixture which results, and (iii) thence, optionally after drying, calcining the product shaped article.
Inventors
- 👤 Thierry Dupin
- 👤 Gilbert Bouge
- 👤 Regis Poisson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:51
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/06; B01J21/063; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8603; C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/0404; C01B17/0426; C01B17/0434; C01B17/0456; C01B17/16; C01B17/165
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
69 words
A process for the preparation of a porous shaped titanium oxide catalyst/carrier, consisting essentially of (i) intimately admixing powdered, poorly crystalline and/or amorphous titanium oxide, said titanium oxide powder characterized by a weight loss on ignition ranging from 1 to 50%, water and from 0 to about 15% by weight of a shaping additive, (ii) next shaping the intimate admixture which results, and (iii) thence calcining the shaped article.
Claim 2
Dependent Claim
69 words
A process for the preparation of a porous shaped titanium oxide catalyst/carrier, consisting essentially of (i) intimately admixing powdered, poorly crystalline and/or amorphous titanium oxide, said titanium oxide powder characterized by a weight loss on ignition ranging from 1 to 50%, water and from 0 to about 15% by weight of a shaping additive, (ii) next shaping the intimate admixture which results, and (iii) thence calcining the shaped article.
Claim 3
Dependent Claim
19 words
The process as defined by claim 1, wherein the shaped article is dried prior to the calcination (iii) thereof.
Claim 4
Dependent Claim
34 words
The process as defined by claims 1 or 2, wherein from about 45 to 99% by weight of the titanium oxide powder and about 1 to 40% by weight of water are intimately admixed.
Claim 5
Dependent Claim
42 words
The process as defined by claim 3, wherein from about 55 to 94.9% by weight of the titanium oxide power, about 5 to 35% by weight of water, and about 0.1 to 10% by weight of the shaping additive are intimately admixed.
Claim 6
Dependent Claim
21 words
The process as defined by claim 3, wherein the weight loss on ignition of the powder ranges from 5 to 40%.
Claim 7
Dependent Claim
26 words
The process as defined by claim 3, wherein the titanium oxide powder is obtained by drying an aqueous suspension of amorphous and/or poorly crystalline titanium oxide.
Claim 8
Dependent Claim
23 words
The process as defined by claim 6, wherein said aqueous suspension is obtained by attack on ilmenite with sulfuric acid, hydrolysis and filtration.
Claim 9
Dependent Claim
35 words
The process as defined by claim 3, wherein up to 30% by weight of an additional ingredient selected from the group consisting of silica, alumina, clay, silicate, titanium sulfate and ceramic fiber is intimately admixed.
Claim 10
Dependent Claim
23 words
The process as defined by claim 3, wherein the shaped article is calcined at a temperature ranging from about 200° to 900° C.
Claim 11
Dependent Claim
46 words
The process as defined by claim 3, including intimately admixing a shaping additive selected from the group consisting of cellulose, carboxymethylcellulose, carboxyethylcellulose, tall oil, xanthane gum, surface-active agent, flocculant, polyacrylamide, carbon black, starch, stearic acid, polyacrylic acid, polyvinyl alcohol, biopolymer, glucose, polyethylene glycol, and mixtures thereof.
Claim 12
Dependent Claim
18 words
The process as defined by claim 3, said titanium oxide powder intimately admixed being poorly crystalline titanium oxide.
Claim 13
Dependent Claim
17 words
The process as defined by claim 3, said titanium oxide powder intimately admixed being amorphous titanium oxide.
Claim 14
Dependent Claim
25 words
The process as defined by claim 3, said titanium oxide powder intimately admixed being a mixture of poorly crystalline titanium oxide and amorphous titanium oxide.
Claim 15
Dependent Claim
19 words
The process as defined by claim 3, said shaping (ii) being into spheres, cylinders, pellets, balls, granules or honeycomb.
Claim 16
Dependent Claim
15 words
The process as defined by claim 3, wherein a pore-forming agent is additionally intimately admixed.
Claim 17
Dependent Claim
14 words
A shaped titanium oxide catalyst/carrier prepared by the process as defined by claim 3.
Claim 18
Dependent Claim
35 words
The titanium oxide catalyst/carrier as defined by claim 16, having a specific surface area of from 5 to 300 m 2 /g and a total pore volume of from 0.05 to 0.5 cm 3 /g.
Claim 19
Dependent Claim
28 words
In a process for sulfur removal via Claus catalysis, the improvement which comprises utilizing, as the catalyst/carrier therefor, the shaped titanium oxide catalyst/carrier as defined by claim 16.
Claim 20
Dependent Claim
50 words
In at least one of the catalyzed reaction sequences: 2H.sub.2 S+SO.sub.2 (3/n)S.sub.n +2H.sub.2 O CS.sub.2 +2H.sub.2 O CO.sub.2 +2H.sub.2 S CS.sub.2 +H.sub.2 O COS+H.sub.2 S or, COS+H.sub.2 O CO.sub.2 +H.sub.2 S the improvement which comprises utilizing, as the catalyst/carrier therefor, the shaped titanium oxide catalyst/carrier as defined by claim 16.
Claim 21
Dependent Claim
40 words
The process as defined by claim 6, wherein said aqueous suspension is obtained by hydrolysis of a titanium compound of the formula TiCl 4-n (OR) n , in which O<n<4 and R is methyl, ethyl, isopropyl, butyl, hexyl or stearyl.
Claim 22
Dependent Claim
22 words
The process as defined by claim 6, wherein said aqueous suspension is obtained by precipitation of a titanium salt with a base.
Claim 23
Dependent Claim
72 words
A process for the preparation of a shaped titanium oxide catalyst/carrier, consisting essentially of admixing a powdered compound convertible upon calcination to a poorly crystalline and/or amorphous titanium oxide powder which is characterized by a weight loss on ignition ranging from 1 to 50%, water and from 0 to about 15% by weight of a shaping additive, (ii) next shaping the intimate admixture which results, and (iii) thence calcining the shaped article.
Claim 24
Dependent Claim
72 words
A process for the preparation of a shaped titanium oxide catalyst/carrier, consisting essentially of admixing a powdered compound convertible upon calcination to a poorly crystalline and/or amorphous titanium oxide powder which is characterized by a weight loss on ignition ranging from 1 to 50%, water and from 0 to about 15% by weight of a shaping additive, (ii) next shaping the intimate admixture which results, and (iii) thence calcining the shaped article.
Claim 25
Dependent Claim
19 words
The process as defined by claim 22, wherein the convertible compound is orthotitanic acid, metatitanic acid, or titanium oxide-hydroxide.
Claim 26
Dependent Claim
33 words
The process as defined by claim 22 or 23, wherein from about 45 to 99% by weight of the convertible compound and about 1 to 40% by weight of water are intimately admixed.
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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) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |