US4124529A
Expired / Lapsed
US
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Carbonaceous adsorbents and process for making same
Assignee: Bergwerksverband GmbH
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Filing: 1977-05-27
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Granted: 1978-11-07
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Expires: 1997-05-27
Abstract
Abstract A carbonaceous adsorbent in the form of a shaped body which has been heated to about 400 to 1400° C in an inert atmosphere is composed essentially of a mixture of finely divided carbonaceous material of a grain size below 50 and up to below 100 microns with a binder composed of about 1 to 20% by weight of a natural or synthetic elastomer and about 1 to 15% by weight of a thermoplastic material. The adsorbent is made by subjecting the mixture to a shaping step followed by heating to a temperature of about 400° to 1400° C in an inert atmosphere which step may be followed by an activation of the carbonaceous material.
Inventors
- 👤 Harald Juntgen
- 👤 Horst Schumacher
- 👤 Jurgen Klein
- 👤 Karl Knoblauch
- 👤 Hans-Jurgen Schroter
- 👤 Georg Kolling
- 👤 Ingo Romey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:42
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; C; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/384
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
122 words
A carbonaceous adsorbent comprising a shaped coal body which has been heated in steps to about 400 to 1000° C. in an inert atmosphere, the said body being essentially composed of a mixture of a finely divided coal material of a grain size below 50 and up to below 100 microns with a binder composed of about 1 to 20% by weight of a natural or synthetic elastomer and about 1 to 15% by weight of a thermoplastic material other than said elastomer wherein the rate of temperature increase is about 0.5° to 10° C./min. in the temperature range between about 400° and 600° C. and is about 5° to 50° C./min. in the temperature range of about 500° to 1000° C.
Claim 2
Dependent Claim
122 words
A carbonaceous adsorbent comprising a shaped coal body which has been heated in steps to about 400 to 1000° C. in an inert atmosphere, the said body being essentially composed of a mixture of a finely divided coal material of a grain size below 50 and up to below 100 microns with a binder composed of about 1 to 20% by weight of a natural or synthetic elastomer and about 1 to 15% by weight of a thermoplastic material other than said elastomer wherein the rate of temperature increase is about 0.5° to 10° C./min. in the temperature range between about 400° and 600° C. and is about 5° to 50° C./min. in the temperature range of about 500° to 1000° C.
Claim 3
Dependent Claim
25 words
The carbonaceous adsorbent of claim 1 in which the coal material is mineral coal, oxidized mineral coal, charcoal, peat coke or lignite low temperature coke.
Claim 4
Dependent Claim
34 words
The carbonaceous adsorbent of claim 1 in which the binding agent is a butadiene-acrylonitrile mixed polymerizate, butadiene-styrene mixed polymerizate and the thermoplastic material is polyvinyl alcohol, polypropylene, polyethylene or a mixture of these materials.
Claim 5
Dependent Claim
43 words
The carbonaceous adsorbent of claim 1 wherein the shaped bodies have a diameter of 0.3 to 3 mm for purposes of water purification, of 2 to 8 mm for purposes of gas separation and of 6 to 10 mm for flue gas desulfurization.
Claim 6
Dependent Claim
41 words
The carbonaceous adsorbent of claim 1 wherein the said mixture comprises 80 to 85 parts by weight of said coal material, 5 to 10 parts by weight of the elastomer and 5 to 10 parts by weight of the thermoplastic material.
Claim 7
Dependent Claim
19 words
The carbonaceous adsorbent of claim 1 wherein the shaped bodies are cylindrical bodies of a diameter below 1 mm.
Claim 8
Dependent Claim
124 words
A process for making the adsorbents of claim 1 comprising mixing said finely divided coal material of a grain size below 50 and up to below 100 microns with a binder composed of about 1 to 20% by weight of a natural or synthetic elastomer and about 1 to 15% by weight of a thermoplastic material, then subjecting the mixture to a shaping step followed by heating of the thus-obtained shaped bodies to a temperature of about 400° to 1000° C. in an inert atmosphere wherein the rate of temperature increase is about 0.5° to 10° C./min. in the temperature range between about 400° and 600° C. and is about 5° to 50° C./min. in the temperature range of about 500° to 1000° C.
Claim 9
Dependent Claim
26 words
The process of claim 7 wherein the binder is added to the said coal material in solid or liquid form or in form of a solution.
Claim 10
Dependent Claim
24 words
The process of claim 7 wherein the shaped bodies are left at the final temperature for a time between about 5 to 45 minutes.
Claim 11
Dependent Claim
23 words
The process of claim 1 which includes the additional step of activation of the material obtained by heating at 600° to 1000° C.
Claim 12
Dependent Claim
22 words
The process of claim 10 wherein the activation is effected by means of steam or carbon dioxide or a mixture of both.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |