US4051098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing shaped active carbon
Assignee: Daiichi Tanso Kogyo KK
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Filing: 1976-07-30
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Granted: 1977-09-27
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Expires: 1996-07-30
Abstract
Abstract This invention relates to a process for manufacturing a shaped active carbon by using a one step phenol-formaldehyde resin, a modified phenol-formaldehyde resin or a mixture thereof as a binder. By this method, a shaped active carbon can be obtained having increased mechanical strength without deterioration of the adsorption capacity.
Inventors
- 👤 Takeshi Takemura
- 👤 Yoshihisa Katoh
- 👤 Shigeyuki Kurita
- 👤 Susumu Sasaki
- 👤 Kyohei Funabiki
- 👤 Keizo Hatano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:32
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/10; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/384; C08G16/00; C08G16/02; C08G65/00; C08G65/34
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
82 words
A composition comprising active carbon particles and as a binder therefor a cured resin selected from the group consisting of a one-step phenolic resin and a furfural-modified phenolic resin wherein said resin is characterized by being soluble in water at 25° C prior to curing and is combined with said active carbon in a weight ratio from 1 part of said binder to 10 parts of said active carbon to 1 part of said binder to 2 parts of said active carbon.
Claim 2
Dependent Claim
82 words
A composition comprising active carbon particles and as a binder therefor a cured resin selected from the group consisting of a one-step phenolic resin and a furfural-modified phenolic resin wherein said resin is characterized by being soluble in water at 25° C prior to curing and is combined with said active carbon in a weight ratio from 1 part of said binder to 10 parts of said active carbon to 1 part of said binder to 2 parts of said active carbon.
Claim 3
Dependent Claim
26 words
The composition of claim 1 in which said granular active carbon is selected from the group consisting of charcoal, cocoanut shell carbon, anthracite and grass peat.
Claim 4
Dependent Claim
21 words
The composition of claim 1 consisting essentially of active carbon particles and as a binder therefor a cured furfural-modified phenolic resin.
Claim 5
Dependent Claim
21 words
The composition of claim 1 consisting essentially of active carbon particles and as a binder therefor a cured one-step phenolic resin.
Claim 6
Dependent Claim
25 words
The composition of claim 3 in which said active carbon is selected from the group consisting of charcoal, cocoanut shell carbon, anthracite and grass peat.
Claim 7
Dependent Claim
25 words
The composition of claim 4 in which said active carbon is selected from the group consisting of charcoal, cocoanut shell carbon, anthracite and grass peat.
Claim 8
Dependent Claim
79 words
A process for preparing a shaped object from a granular active carbon composition comprising: 1. mixing with said granular active carbon a binding amount of a curable thermosetting resin beinder selected from the group consisting of a one-step phenolic resin and a furfural-modified phenolic resin, said resin having the property of solubility in water at 25° C, 2. forming said shaped object from the mixture of said binder and granular carbon, and 3. drying and curing said shaped object.
Claim 9
Dependent Claim
79 words
A process for preparing a shaped object from a granular active carbon composition comprising: 1. mixing with said granular active carbon a binding amount of a curable thermosetting resin beinder selected from the group consisting of a one-step phenolic resin and a furfural-modified phenolic resin, said resin having the property of solubility in water at 25° C, 2. forming said shaped object from the mixture of said binder and granular carbon, and 3. drying and curing said shaped object.
Claim 10
Dependent Claim
34 words
The process of claim 7 wherein said drying is accomplished at a temperature between room temperature and 150° C and wherein said curing is accomplished at a temperature between 120° C and 150° C.
Claim 11
Dependent Claim
40 words
The process of claim 8 wherein said resin binder is combined with said granular active carbon in a weight ratio from 1 part of binder to 10 parts of carbon to 1 part of binder to 2 parts of carbon.
Claim 12
Dependent Claim
33 words
The process of claim 9 wherein said resin binder and granular active carbon are of a particle size which permits said carbon and said resin binder to pass through an 80 mesh sieve.
References Cited (Backward Citations)
US4009143A
Cited
US3960761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |