US4110247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing colloidal sol of antimony oxide
Assignee: Harshaw Chemical Co
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Filing: 1977-04-07
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Granted: 1978-08-29
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Expires: 1997-04-07
Abstract
Abstract A method of preparing a colloidal aqueous dispersion of antimony pentoxide from substantially water-insoluble metal antimonate is described. The method comprises contacting an aqueous slurry of the metal antimonate with a cation exchange resin whereby the metal antimonate is converted to the colloidal antimony pentoxide. A preferred method involves passing the slurry of metal antimonate through a fluidized bed containing a cation exchange resin. The colloidal sols obtained in the prescribed manner are useful as flame retardants when combined with halogen compounds.
Inventors
- 👤 II Reginald P. Gower
- 👤 John G. Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:50
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/2279; B; B82; B82Y; B82Y30/00; C01; C01G; C01G30/00; C01G30/004; C01P; C01P2004/00; C01P2004/60; C01P2004/64; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
51 words
A method of preparing a colloidal aqueous sol of antimony pentoxide from a water-insoluble metal antimonate comprising: (a) preparing an aqueous slurry of a water-insoluble metal antimonate, and (b) passing the aqueous slurry through a fluidized bed containing a cation exchange resin whereby metal antimonate is converted to colloidal antimony pentoxide.
Claim 2
Independent Claim
51 words
A method of preparing a colloidal aqueous sol of antimony pentoxide from a water-insoluble metal antimonate comprising: (a) preparing an aqueous slurry of a water-insoluble metal antimonate, and (b) passing the aqueous slurry through a fluidized bed containing a cation exchange resin whereby metal antimonate is converted to colloidal antimony pentoxide.
Claim 3
Dependent Claim
41 words
The method of claim 1 wherein the aqueous slurry of metal antimonate is recirculated through the fluidized bed containing the cation exchange resin for a length of time sufficient to convert substantially all of the metal antimonate to colloidal antimony pentoxide.
Claim 4
Independent Claim
46 words
A method of preparing a colloidal aqueous sol of antimony pentoxide from sodium antimonate comprising: (a) preparing an aqueous slurry of sodium antimonate, and (b) passing said slurry through a fluidized bed containing a cation exchange resin whereby sodium antimonate is converted to colloidal antimony pentoxide.
Claim 5
Independent Claim
46 words
A method of preparing a colloidal aqueous sol of antimony pentoxide from sodium antimonate comprising: (a) preparing an aqueous slurry of sodium antimonate, and (b) passing said slurry through a fluidized bed containing a cation exchange resin whereby sodium antimonate is converted to colloidal antimony pentoxide.
Claim 6
Dependent Claim
41 words
The method of claim 3 wherein the aqueous slurry of sodium antimonate is recirculated through the fluidized bed containing the cation exchange resin for a length of time sufficient to convert substantially all of the sodium antimonate to colloidal antimony pentoxide.
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) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |