US4087383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for acid treating solid supports
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1976-02-18
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Granted: 1978-05-02
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Expires: 1996-02-18
Abstract
Abstract Process for preparing shaped base materials for use in solid catalysts for commercial processes. The solid contact material is prepared by pre-soaking a porous solid particulate carrier material in an organic liquid, immersing the carrier without drying in a dilute acid solution for a given time interval, washing, drying and calcining the impregnated carrier. After calcination, the carrier is impregnated with an active material.
Inventors
- 👤 Martin O. Gernand
- 👤 Dale D. Maness
- 👤 Neville L. Cull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:06
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/508; B01D53/02; B01D53/74; B01D53/86; B01D53/8621; B01D53/8625; B01D53/8628; B01J; B01J37/00; B01J37/02; B01J37/0201; B01J37/0207
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
170 words
A method of preparing a porous solid contact material which comprises the steps of: (a) immersing particles of a porous solid inorganic refractory carrier material in a polar organic presoak liquid so as to substantially completely fill the pores of the carrier, said presoak liquid being capable of wetting the carrier material and capable of displacement by the acid etching solution used in step (c) at a rate slow enough to permit control of the extent of acid attack; (b) separating said carrier material from said presoak liquid; (c) immersing said carrier material in an acid solution, said acid solution being substantially immiscible with said presoak liquid; (d) removing said acid solution from said carrier material; (e) impregnating the acid solution treated carrier material with an impregnating solution containing a metal compound which is decomposable into a desired catalyst or sorbent; (f) drying said carrier material and converting said decomposable metal compound to said desired catalytic or sorbing metal or metal oxide or a mixture of metals or metal oxides.
Claim 2
Independent Claim
170 words
A method of preparing a porous solid contact material which comprises the steps of: (a) immersing particles of a porous solid inorganic refractory carrier material in a polar organic presoak liquid so as to substantially completely fill the pores of the carrier, said presoak liquid being capable of wetting the carrier material and capable of displacement by the acid etching solution used in step (c) at a rate slow enough to permit control of the extent of acid attack; (b) separating said carrier material from said presoak liquid; (c) immersing said carrier material in an acid solution, said acid solution being substantially immiscible with said presoak liquid; (d) removing said acid solution from said carrier material; (e) impregnating the acid solution treated carrier material with an impregnating solution containing a metal compound which is decomposable into a desired catalyst or sorbent; (f) drying said carrier material and converting said decomposable metal compound to said desired catalytic or sorbing metal or metal oxide or a mixture of metals or metal oxides.
Claim 3
Dependent Claim
12 words
The method of claim 1, in which the carrier material is alumina.
Claim 4
Dependent Claim
12 words
The method of claim 1, in which the carrier material is hydrophilic.
Claim 5
Dependent Claim
22 words
The method of claim 1, in which in step (d) said acid solution is removed by washing said carrier material with water.
Claim 6
Dependent Claim
13 words
The method of claim 1, in which the active material is copper oxide.
Claim 7
Dependent Claim
22 words
The method of claim 1, wherein said presoak liquid comprises one or more aliphatic monohydric alcohols containing 4 to 12 carbon atoms.
Claim 8
Dependent Claim
11 words
The method of claim 1, wherein said presoak liquid is 1-pentanol.
Claim 9
Dependent Claim
11 words
The method of claim 1, wherein said presoak liquid is 1-decanol.
Claim 10
Dependent Claim
13 words
The method of claim 1, wherein said impregnating solution is an aqueous solution.
Claim 11
Dependent Claim
11 words
The method of claim 1, wherein said acid is water soluble.
Claim 12
Dependent Claim
21 words
The method of claim 1 wherein said acid has an ionization constant of at least about 1.0 × 10 -3 .
Claim 13
Dependent Claim
11 words
The method of claim 1 wherein said acid is hydrochloric acid.
References Cited (Backward Citations)
US3816597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |