US4058483A
Expired / Lapsed
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Adsorbent material
Assignee: Imperial Chemical Industries Ltd
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Filing: 1976-06-14
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Granted: 1977-11-15
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Expires: 1996-06-14
Abstract
Abstract An adsorptive material, useful for removing substances from gases and liquids is in discrete pieces, each comprising an adsorptive carbon and an inorganic adsorptive oxide in a mutual weight proportion between 1:5 and 5:1, and the discrete pieces having been formed by a wet method.
Inventors
- 👤 Richard George Cleveland Henbest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:46
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
74 words
A method of making an adsorptive material which is in shaped discrete pieces comprising mixing active carbon powder with an aqueous solution of sodium silicate to form a moist mixture, forming the moist mixture into shaped discrete pieces, drying the pieces, immersing the pieces in a silicate-insolubilizing reagent until the silicate-content of the pieces has become insolubilized, washing the pieces with water, and drying the pieces at a temperature of at least 100° C.
Claim 2
Independent Claim
74 words
A method of making an adsorptive material which is in shaped discrete pieces comprising mixing active carbon powder with an aqueous solution of sodium silicate to form a moist mixture, forming the moist mixture into shaped discrete pieces, drying the pieces, immersing the pieces in a silicate-insolubilizing reagent until the silicate-content of the pieces has become insolubilized, washing the pieces with water, and drying the pieces at a temperature of at least 100° C.
Claim 3
Dependent Claim
14 words
A method as in claim 1, wherein the moist mixture is formed into granules.
Claim 4
Dependent Claim
17 words
A method as in claim 1, wherein the moist mixture is formed into the shape of rods.
Claim 5
Dependent Claim
13 words
A method as in claim 1, wherein the silicate-insolubilizing reagent is sulphuric acid.
Claim 6
Dependent Claim
13 words
A method as in claim 1, wherein the silicate-insolubilizing reagent is acetic acid.
Claim 7
Dependent Claim
13 words
A method as in claim 1, wherein the silicate-insolubilizing reagent is ammonium sulphate.
Claim 8
Dependent Claim
13 words
A method as in claim 1 wherein the silicate-insolubilizing reagent is phosphoric acid.
Claim 9
Dependent Claim
13 words
A method as in claim 1 wherein the silicate-insolubilizing reagent is ammonium chloride.
Claim 10
Dependent Claim
27 words
A method as in claim 1 wherein the ratio of carbon powder to sodium silicate in terms of dry weight is from about 3:1 to about 1:1.
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) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-14 | 1989-05-16 | 1989-11-15 | $7700.00 | Window Closed / Lapsed |