Patent US1480761A successfully refreshed from Google Patents.
Patent US3962137A successfully refreshed from Google Patents.
US3962137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of co-catalyst composition of increased abrasion resistance
Assignee: Celanese Corp
•
Filing: 1974-11-25
•
Granted: 1976-06-08
•
Expires: 1994-11-25
Abstract
Abstract The present invention provides a process for preparing a co-catalyst composition of increased abrasion resistance for use in reactions which involve reaction conditions of high stress, e.g., vapor phase oxidations. The process comprises intimately mixing an aqueous suspension of colloidal silica particles with a water-soluble metal salt which is decomposable by heat to a metal oxide, calcining the mixture, adding a further amount of the aqueous suspension of colloidal silica particles, and drying this co-catalyst composition.
Inventors
- 👤 Paul D. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:12
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
232 words
A process for preparing an abrasion resistant, cocatalyst composition comprising vanadium tetroxide and non-porous colloidal silica particles, which process comprises (a) intimately mixing at a temperature of from about 25° to about 115°C an aqueous suspension which comprises from about 6 to about 30 percent by weight non-porous colloidal silica particles and from about 70 to about 94 percent by weight water with an aqueous solution of vanadyl salt which comprises from about 20 to about 60 percent by weight vanadyl salt and from about 40 to about 80 weight percent water, (b) calcining this mixture at a temperature greater than about 300°C to form a vanadium tetroxide and non-porous colloidal silica containing co-catalyst composition, (c) adding at a temperature of from about 25° to about 115°C an aqueous suspension which comprises from about 6 to about 30 percent by weight non-porous colloidal silica particles and from about 70 to about 94 percent by weight water to the calcined co-catalyst composition of step (b), and (d) drying this composite co-catalyst at a temperature of from about 25° to about 115°C, wherein in said process from about 30 to about 70 percent by weight of the total amount of the non-porous colloidal silica is added in step (a) and correspondingly from about 70 to about 30 percent by weight of the total amount of the non-porous colloidal silica is added in step (c).
Claim 2
Dependent Claim
232 words
A process for preparing an abrasion resistant, cocatalyst composition comprising vanadium tetroxide and non-porous colloidal silica particles, which process comprises (a) intimately mixing at a temperature of from about 25° to about 115°C an aqueous suspension which comprises from about 6 to about 30 percent by weight non-porous colloidal silica particles and from about 70 to about 94 percent by weight water with an aqueous solution of vanadyl salt which comprises from about 20 to about 60 percent by weight vanadyl salt and from about 40 to about 80 weight percent water, (b) calcining this mixture at a temperature greater than about 300°C to form a vanadium tetroxide and non-porous colloidal silica containing co-catalyst composition, (c) adding at a temperature of from about 25° to about 115°C an aqueous suspension which comprises from about 6 to about 30 percent by weight non-porous colloidal silica particles and from about 70 to about 94 percent by weight water to the calcined co-catalyst composition of step (b), and (d) drying this composite co-catalyst at a temperature of from about 25° to about 115°C, wherein in said process from about 30 to about 70 percent by weight of the total amount of the non-porous colloidal silica is added in step (a) and correspondingly from about 70 to about 30 percent by weight of the total amount of the non-porous colloidal silica is added in step (c).
Claim 3
Dependent Claim
228 words
A process for preparing an abrasion resistant, co-catalyst composition comprising vanadium tetroxide and non-porous colloidal silica particles, which process comprises (a) intimately mixing at a temperature of from about 30° to about 110°C an aqueous suspension which contains less than the total amount of non-porous colloidal silica particles ultimately added to form a co-catalyst composition, with an aqueous solution of vanadyl oxalate, (b) calcining this mixture at a temperature greater than about 400°C and up to about 600°C in a nitrogen gas stream to form a vanadium tetroxide and non-porous colloidal silica containing co-catalyst composition, (c) adding at a temperature of from about 30° to about 110°C an aqueous suspension which comprises the balance of the nonporous colloidal silica particles, and (d) drying this composite co-catalyst at a temperature of from about 30 to about 110°C wherein the final co-catalyst composition contains from about 65 to about 90 percent by weight vanadium tetroxide and correspondingly from about 10 to about 35 percent by weight non-porous colloidal silica based on the total weight of the co-catalyst composition, wherein in said process from about 30 to about 70 percent by weight of the total amount of the non-porous colloidal silica is added in step (a) and correspondingly from about 70 to about 30 percent by weight of the total amount of the non-porous colloidal silica is added in step (c).
Claim 4
Dependent Claim
228 words
A process for preparing an abrasion resistant, co-catalyst composition comprising vanadium tetroxide and non-porous colloidal silica particles, which process comprises (a) intimately mixing at a temperature of from about 30° to about 110°C an aqueous suspension which contains less than the total amount of non-porous colloidal silica particles ultimately added to form a co-catalyst composition, with an aqueous solution of vanadyl oxalate, (b) calcining this mixture at a temperature greater than about 400°C and up to about 600°C in a nitrogen gas stream to form a vanadium tetroxide and non-porous colloidal silica containing co-catalyst composition, (c) adding at a temperature of from about 30° to about 110°C an aqueous suspension which comprises the balance of the nonporous colloidal silica particles, and (d) drying this composite co-catalyst at a temperature of from about 30 to about 110°C wherein the final co-catalyst composition contains from about 65 to about 90 percent by weight vanadium tetroxide and correspondingly from about 10 to about 35 percent by weight non-porous colloidal silica based on the total weight of the co-catalyst composition, wherein in said process from about 30 to about 70 percent by weight of the total amount of the non-porous colloidal silica is added in step (a) and correspondingly from about 70 to about 30 percent by weight of the total amount of the non-porous colloidal silica is added in step (c).
Claim 5
Dependent Claim
8 words
The product of the process of claim 1.
Claim 6
Dependent Claim
8 words
The product of the process of claim 2.
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) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |