US4716135A
Expired / Lapsed
US
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Organophosphorus-modified zeolites and method of preparation
Assignee: Mobil Oil AS
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Filing: 1986-11-18
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Granted: 1987-12-29
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Expires: 2006-11-18
Abstract
Abstract High VI lube oils are obtained in high yields when lower olefins are polymerized over an aluminosilicate HZSM-5 type catalyst or zeolite beta whose surface Brönsted acid sites have been inactivated with a sterically hindered basic organophosphorus compound.
Inventors
- 👤 Catherine S. H. Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:06
CPC Classifications
C; C10; C10G; C10G50/00; C10G50/02; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/70; B01J29/7007; B01J29/65
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
45 words
A surface-inactivated catalyst composition comprising a medium or large pore shape-selective siliceous zeolite material having active internal Bronsted acid sites and containing a surface-inactivating amount of an organophosphorus base or cation, the base or cation having an effective cross section larger than the zeolite pore.
Claim 2
Dependent Claim
45 words
A surface-inactivated catalyst composition comprising a medium or large pore shape-selective siliceous zeolite material having active internal Bronsted acid sites and containing a surface-inactivating amount of an organophosphorus base or cation, the base or cation having an effective cross section larger than the zeolite pore.
Claim 3
Dependent Claim
36 words
The catalyst composition of claim 1 wherein said zeolite material comprises aluminosilicate having a silica-to-alumina mole ratio of at least 12 and a constraint index of about 0.5 to 12 prior to phosphorus compound surface treatment.
Claim 4
Dependent Claim
37 words
The catalyst composition of claim 2 wherein the aluminosilicate consists essentially of HZSM-5 having an acid cracking value of about 50 to 400 prior to treatment, and wherein surface acidity is neutralized by a quaternary phosphonium compound.
Claim 5
Dependent Claim
18 words
The catalyst composition of claim 1 wherein the organophosphorus base comprises at least one phosphine or phosphonium compound.
Claim 6
Dependent Claim
15 words
The catalyst composition of claim 4 wherein the organophosphorus compound comprises a tetraphenyl phosphonium salt.
Claim 7
Dependent Claim
18 words
The catalyst of claims 1 and 2 wherein the zeolite material comprises ZSM-5 type zeolites or zeolite beta.
Claim 8
Independent Claim
64 words
A method of making a shape-selective catalyst comprising contacting an acid medium pore zeolite having the structure of ZSM-5 with a solution of an organophosphorus deactivating agent to chemisorb said agent onto the zeolite surface for rendering said zeolite surface substantially inactive for acidic reaction, the deactivating agent comprising a tertiary phosphine or quaternary phosphonium compound having an effective cross-section greater than 5 Angstroms.
Claim 9
Independent Claim
64 words
A method of making a shape-selective catalyst comprising contacting an acid medium pore zeolite having the structure of ZSM-5 with a solution of an organophosphorus deactivating agent to chemisorb said agent onto the zeolite surface for rendering said zeolite surface substantially inactive for acidic reaction, the deactivating agent comprising a tertiary phosphine or quaternary phosphonium compound having an effective cross-section greater than 5 Angstroms.
Claim 10
Dependent Claim
65 words
A surface-inactivated catalyst composition comprising a zeolite having the structure of ZSM-5 and having active internal Bronsted acid sites and containing no metals other than periodic group IIIB or IVB elements and having an acid cracking value of greater than 50 and containing a surface-inactivating amount of an organophosphorus base or cation, said base or cation having an effective cross-section larger than a zeolite pore.
Claim 11
Dependent Claim
65 words
A surface-inactivated catalyst composition comprising a zeolite having the structure of ZSM-5 and having active internal Bronsted acid sites and containing no metals other than periodic group IIIB or IVB elements and having an acid cracking value of greater than 50 and containing a surface-inactivating amount of an organophosphorus base or cation, said base or cation having an effective cross-section larger than a zeolite pore.
Claim 12
Dependent Claim
37 words
The method of claim 7 wherein the zeolite catalyst having the structure of ZSM-5 has a constraint index less than 10 prior to treatment with the deactivating agent and a constraint index greater than 12 following treatment.
Claim 13
Dependent Claim
43 words
An improved medium pore siliceous zeolite material having internally active Bronsted acid sites and being surface inactivated by treatment with sufficient organophosphorus to increase substrate material constraint index by at least 20%, the organophosphorus having an effective cross-section larger than the zeolite pore.
Claim 14
Dependent Claim
43 words
An improved medium pore siliceous zeolite material having internally active Bronsted acid sites and being surface inactivated by treatment with sufficient organophosphorus to increase substrate material constraint index by at least 20%, the organophosphorus having an effective cross-section larger than the zeolite pore.
Claim 15
Dependent Claim
40 words
The zeolite material of claim 10 wherein the pore size is about 5 to 8 Angstroms, wherein the untreated substrate has a constraint index less than 12, and the phosphorus-treated material has a constraint index of about 12 to 40.
Claim 16
Dependent Claim
30 words
The zeolite material of claim 11 wherein the substrate consists essentially of zeolite having the structure of ZSM-5 and containing no metals other than periodic group IIIB or IVB elements.
Claim 17
Dependent Claim
23 words
The zeolite material of claim 12 wherein the substrate consists essentially of aluminosilicate HZSM-5 having a constraint Index of about 6 to 10.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |