US3676368A
Expired / Lapsed
US
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Rare earth-hydrogen exchanged zeolites
Assignee: WR Grace and Co Conn
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Filing: 1970-08-26
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Granted: 1972-07-11
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Expires: 1990-08-26
Abstract
Abstract Alkali metal faujasite having a silica to alumina ratio in excess of about 3 is rate earth exchanged in an acid media at a pH of about 3.0 to 3.5, calcined, and washed to reduce the alkali metal oxide content thereof to a low level. The exchanged faujasite contains 6 to 14 percent by weight rare earth oxide and a concentration of hydrogen ions which imparts the desired catalytic activity. The present rare earth-hydrogen faujasite finds utility as a hydrocarbon conversion catalyst, and particularly as an ingredient in catalytic cracking catalyst compositions.
Inventors
- 👤 Julius Scherzer
- 👤 Edwin W Albers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:22
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; B01J29/00; B01J29/04; B01J29/06; B01J29/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
22 words
The faujasite prepared by way of claim 1 wherein said rare earth ion solution is an aqueous solution of rare earth chlorides.
Claim 2
Dependent Claim
37 words
The faujasite prepared by way of claim 2 wherein said rare earth chloride solution contains from about 10 to 30 percent excess rare earth ion required to theoretically fully exchange the alkali metal ions of said faujasite.
Claim 3
Dependent Claim
23 words
The faujasite prepared by way of claim 1 wherein said rare earth exchange is conducted at a temperature of 60* to 105* C.
Claim 4
Independent Claim
110 words
A method for preparing a rare earth-hydrogen faujasite which comprises: a. exchanging an alkali metal faujasite having a silica to alumina ratio of 3 to 6 with an aqueous solution of rare earth ions at a pH of 3.0 to 3.5 to reduce the alkali metal oxide of said faujasite to less than about 3 to 4 percent by weight, b. calcining said exchanged faujasite at a temperature of about 800* to 1,400* F. for a period of 1 to 3 hours, and c. exchanging said calcined faujasite with a solution of ammonium ion to reduce the alkali metal oxide content thereof to less than about 0.5 percent by weight.
Claim 5
Dependent Claim
20 words
The method of claim 5 wherein said exchange step (a) is conducted in an aqueous solution of rare earth chlorides.
Claim 6
Dependent Claim
36 words
The method of claim 6 wherein said rare earth chloride solution contains from about 10 to 30 percent by weight excess rare earth ion required to theoretically fully exchange the alkali metal ions of said faujasite.
Claim 7
Dependent Claim
26 words
The method of claim 7 wherein said exchange is conducted for a period of 0.5 to 3 hours at a temperature of 60* to 105* C.
Claim 8
Dependent Claim
10 words
A hydrocarbon conversion catalyst comprising the faujasite of claim 1.
Claim 9
Dependent Claim
22 words
The hydrocarbon conversion catalyst of claim 9 which contains from about 75 to 95 percent by weight of an inorganic oxide matrix.
Claim 10
Dependent Claim
25 words
The composition of claim 10 wherein said inorganic oxide matrix is selected from the group consisting of silica, alumina, silica-alumina, hydrogel, clay and mixtures thereof.
Claim 11
Dependent Claim
13 words
The composition of claim 11 wherein said matrix comprises silica-alumina hydrogel and clay.
References Cited (Backward Citations)
US3393147A
Cited
US3459680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |