US4544650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing hydrophobic adsorbents
Assignee: INSTITUT FOR ENERGETIK ZENTRALSTELLE fur RATIONELLE ENERGIEANWENDUNG TORGAUER STR 114
•
Filing: 1984-05-29
•
Granted: 1985-10-01
•
Expires: 2004-05-29
Abstract
Abstract A composite mass with a major proportion of inorganic material and a minor proportion of organic material, preferably from industrial waste products, is activated by dehydration of its organic constituents whereupon the mass is subjected to a two-phase pyrolytic process. In a first stage, lasting for 2 to 3 hours it is heated to about 600° C. with carbonization of the organic constituents; in a second stage, lasting for 1 to 2 hours, the mass is sintered or consolidated at a temperature between about 900° and 1150° C.
Inventors
- 👤 Reiner Kinder
- 👤 Johannes Teubel
- 👤 Herbert Schuster
- 👤 Christine Fanslau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:26
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; B; B01; B01J; B01J20/00; B01J20/02; B01J20/20; B01J20/30; B01J20/3078; C04B38/00; C04B38/0022; C04B41/45; C04B41/50; C04B41/5001
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
137 words
A process for manufacturing a hydrophobic adsorbent, comprising the steps of: (a) mixing fly ash and an organic constituent selected from the group which consists of bituminous material, rubber, fatty acids and residues thereof, molasses and waste sulfite liquor residue to form a mixture of solid inorganic and organic constituents; (b) dehydrating said organic constituents in said mixture by combining zinc chloride with said mass and heating said mass to a temperature of about 600° C. in a nonoxidizing atmosphere and maintaining said temperature for a period of time sufficient to carbonize said organic constituents and transform said mixture into an activated mass; and (c) thereafter heating said mass to a higher temperature between substantially 900° C. and 1150° C. and maintaining said mass at said higher temperature for a postcarbonization period sufficient to consolidate said mass.
Claim 2
Dependent Claim
137 words
A process for manufacturing a hydrophobic adsorbent, comprising the steps of: (a) mixing fly ash and an organic constituent selected from the group which consists of bituminous material, rubber, fatty acids and residues thereof, molasses and waste sulfite liquor residue to form a mixture of solid inorganic and organic constituents; (b) dehydrating said organic constituents in said mixture by combining zinc chloride with said mass and heating said mass to a temperature of about 600° C. in a nonoxidizing atmosphere and maintaining said temperature for a period of time sufficient to carbonize said organic constituents and transform said mixture into an activated mass; and (c) thereafter heating said mass to a higher temperature between substantially 900° C. and 1150° C. and maintaining said mass at said higher temperature for a postcarbonization period sufficient to consolidate said mass.
Claim 3
Dependent Claim
23 words
The process defined in claim 1 wherein the proportion of fly ash in said mixture is greater than that of said organic constituent.
Claim 4
Dependent Claim
42 words
The process defined in claim 1 wherein the heating in step (b) is carried out for a period of about 2 to 3 hours and the heating in step (c) is carried out for a period of about 1 to 2 hours.
Claim 5
Dependent Claim
61 words
The process defined in claim 1 wherein the amount of said organic constituent in said mixture in terms of the carbonization residue thereof is equal to at most about 50% by weight of the amount of said fly ash, and the amount of the zinc chloride added in said mixture equals at most about 100% by weight of said carbonization residue.
Claim 6
Dependent Claim
28 words
The process defined in claim 1 wherein said organic constituent is combined with the zinc chloride prior to the addition of the fly ash to form the mixture.
Claim 7
Dependent Claim
24 words
The process defined in claim 1 wherein said fly ash forms a porous matrix which is impregnated with said organic constituent in step (a).
References Cited (Backward Citations)
US1549867A
Cited
US2892240A
Cited
US3152985A
Cited
US3886093A
Cited
US4206078A
Cited
JPS553804A
Cited
GB2082960A
Cited
JPS5795816A
Cited
US4440867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-30 | 1989-04-01 | 1989-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-30 | 1993-04-01 | 1993-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-30 | 1997-04-01 | 1997-10-01 | $7700.00 | Window Closed / Lapsed |