US4744829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing agglomerates which are resistant to leaching out
Assignee: Individual
•
Filing: 1986-07-11
•
Granted: 1988-05-17
•
Expires: 2006-07-11
Abstract
Abstract A process for the production of agglomerates which are resistant to leaching out, from finely divided waste materials, is characterized in that a hydraulic binding agent is dissolved in water under a condition of forced mixing until it substantially no longer sediments, the resulting aqueous colloidal solution is combined with the finely divided waste materials and in so doing the water content of the mixture is adjusted to an agglomeratable consistency, the mixture is agglomerated through mixing, and then hardened.
Inventors
- 👤 Hubert Eirich
- 👤 Paul Eirich
- 👤 Walter Eirich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:52
CPC Classifications
C; C04; C04B; C04B18/00; C04B18/02; C04B18/021; B; B09; B09B; B09B1/00; B09B3/00; B09B3/30; B09B3/38; C04B40/00; C04B40/0025; C04B2111/00; C04B2111/00474; C04B2111/00767; C04B2111/00784; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S106/00; Y10S106/01
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
77 words
A process for producing agglomerates from finely divided waste materials, which are resistant to leaching out, characterised in that a hydraulic binding agent is dissolved in water under a condition of forced mixing until it substantially no longer sediments; the resulting aqueous colloidal solution is combined with the finely divided waste materials and in so doing the water content of the mixture is adjusted to an agglomeratable consistency; the mixture is agglomerated through mixing, and then hardened.
Claim 2
Dependent Claim
77 words
A process for producing agglomerates from finely divided waste materials, which are resistant to leaching out, characterised in that a hydraulic binding agent is dissolved in water under a condition of forced mixing until it substantially no longer sediments; the resulting aqueous colloidal solution is combined with the finely divided waste materials and in so doing the water content of the mixture is adjusted to an agglomeratable consistency; the mixture is agglomerated through mixing, and then hardened.
Claim 3
Dependent Claim
23 words
A process according to claim 1 characterised in that the hydraulic binding agent used is either cement or lime or a combination thereof.
Claim 4
Dependent Claim
28 words
A process according to claim 1 characterised by using from 3 to 15% by weight with respect to the waste materials to be agglomerated, of hydraulic binding agent.
Claim 5
Dependent Claim
28 words
A process according to claim 3 characterised by using from 5 to 10% by weight of hydraulic binding agent with respect to the waste materials to be agglomerated.
Claim 6
Dependent Claim
31 words
A process according to claim 1 characterised by adjusting the water content of the mixture to from 5 to 30% by weight with respect to the waste materials to be agglomerated.
Claim 7
Dependent Claim
32 words
A process according to claim 5 characterised by adjusting the water content of the mixture to equal from 10 to 20% by weight with respect to the waste materials to be agglomerated.
Claim 8
Dependent Claim
31 words
A process according to claim 1 characterised in that the hydraulic binding agent is dissolved with from 10 to 50% by weight of water, with respect to the hydraulic binding agent.
Claim 9
Dependent Claim
31 words
A process according to claim 7 characterised in that the hydraulic binding agent is dissolved with from 25 to 35% by weight of water with respect to the hydraulic binding agent.
Claim 10
Dependent Claim
32 words
A process according to claim 1 characterised in that the waste materials are used in a finely divided form such that 50% of the grains are at most 30 μm in diameter.
Claim 11
Dependent Claim
18 words
A process according to claim 1 characterised in that the agglomerates are hardened with the application of heat.
Claim 12
Dependent Claim
27 words
A process according to claim 10 characterised in that the agglomerates are hardened with the application of heat for a period of from 2 to 10 hours.
Claim 13
Dependent Claim
22 words
A process according to claim 1 characterised in that hardening is effected with the application of a feed of CO 2 .
Claim 14
Dependent Claim
16 words
A process according to claim 1 characterised in that heat is supplied during the mixing operation.
Claim 15
Dependent Claim
17 words
A process according to claim 13 characterised in that said heat is in the form of steam.
Claim 16
Dependent Claim
39 words
A process according to claim 1 characterised in that, when using hot finely divided waste materials, said waste materials are cooled prior to the mixing operation with the dissolved hydraulic binding agent, to a temperature of below 100° C.
Claim 17
Dependent Claim
33 words
A process according to claim 15 characterised in that said waste materials are cooled prior to the mixing operations with the dissolved hydraulic binding agent to a temperature between 50° to 80° C.
Claim 18
Dependent Claim
27 words
A process according to claim 1 characterised in that the finely divided waste materials used are ashes from refuse or sewage sludge incineration plants or filter dusts.
Claim 19
Dependent Claim
19 words
A process according to claim 17 characterised in that said waste material consists of those with heavy metal contents.
Claim 20
Dependent Claim
23 words
A process according to claim 1 characterised in that the said 50% of said waste materials are, at most, 50 μm in diameter.
Claim 21
Dependent Claim
23 words
A process according to claim 1 characterised in that the said 50% of said waste materials are, at most, 100 μm in diameter.
Claim 22
Dependent Claim
24 words
A process according to claim 1 characterised in that hardening is effected with a combination of heat and a feed of CO 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) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |