US4201552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal-oil slurry compositions
Assignee: New England Power Service Co
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Filing: 1978-07-20
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Granted: 1980-05-06
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Expires: 1998-07-20
Abstract
Abstract Coal-oil slurries are provided which contain a cationic stabilizer containing the group, >N-CH2-CH2-O-. The stabilizer can comprise a quaternary ammonium salt or a tertiary amine.
Inventors
- 👤 Robert L. Rowell
- 👤 Stephen R. Vasconcellos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:20
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/32; C10L1/322
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
50 words
A coal-oil slurry which contains a cationic stabilizer having the group, >N--CH 2 --CH 2 --O-- in an amount effective to form a stable slurry containing up to about 50 weight percent coal; said stabilizer being selected from the group consisting of a tertiary amine and a quaternary ammonium salt.
Claim 2
Dependent Claim
50 words
A coal-oil slurry which contains a cationic stabilizer having the group, >N--CH 2 --CH 2 --O-- in an amount effective to form a stable slurry containing up to about 50 weight percent coal; said stabilizer being selected from the group consisting of a tertiary amine and a quaternary ammonium salt.
Claim 3
Dependent Claim
40 words
The slurry of claim 1 wherein the stabilizer is a tertiary amine of the formula: ##STR6## wherein R 1 is alkyl containing from 12 to 22 carbon atoms and the sum of m and n is from 5 to 20.
Claim 4
Dependent Claim
16 words
The slurry of claim 2 wherein R 1 has 16 carbon atoms and m+n is 10.
Claim 5
Dependent Claim
16 words
The slurry of claim 2 wherein R 1 has 12 carbon atoms and m+n is 5.
Claim 6
Dependent Claim
12 words
The slurry of claim 1 wherein the stabilizer is N-soya-N-ethyl morpholinium ethosulfate.
Claim 7
Dependent Claim
27 words
The slurry of any one of claims 1 through 5 wherein the stabilizer comprises between about 0.1 and 1.0 weight percent based upon the weight of coal.
Claim 8
Dependent Claim
20 words
The slurry of any one of claims 1 through 5 wherein the slurry contains up to 5 weight percent water.
Claim 9
Dependent Claim
15 words
The slurry of claim 6 wherein the slurry contains up to 5 weight percent water.
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) | 1983-05-06 | 1983-11-05 | 1984-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-06 | 1987-11-05 | 1988-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-06 | 1991-11-05 | 1992-05-06 | $7700.00 | Window Closed / Lapsed |