US4177039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersant for coal into oils
Assignee: Lion Corp
•
Filing: 1978-11-27
•
Granted: 1979-12-04
•
Expires: 1998-11-27
Abstract
Abstract A dispersant for coal into oils which comprises a metal salt of a dialkyl sulfosuccinate and a lower aliphatic alcohol and a coal-oil mixed fuel containing the dispersant. The coal-oil mixed fuel containing the dispersant is provided with excellent stability and fluidity for a long period of time by virtue of a high dispersing effect of the dispersant.
Inventors
- 👤 Kouhei Sakuma
- 👤 Toshiyuki Ukigai
- 👤 Tatsuji Yamashita
- 👤 Osamu Yamaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:45
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/32; C10L1/322; Y; Y10; Y10S; Y10S516/00; Y10S516/905; Y10S516/909; Y10S516/913
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
A dispersant for coal into oils which comprises: (a) a metal salt of a dialkyl sulfosuccinate of the general formula: ##STR2## wherein R 1 and R 2 each represent an alkyl group having at least 4 carbon atoms, n represents an integer of 1˜3 and M represents a metal having a valency of n, and (b) at least one lower aliphatic alcohol selected from the group consisting of a monohydric alcohol having 1˜5 carbon atoms, a polyhydric alcohol having 2˜5 carbon atoms and an alcohol with 2˜5 carbon atoms having an alkoxy group with 1˜5 carbon atoms.
Claim 2
Dependent Claim
97 words
A dispersant for coal into oils which comprises: (a) a metal salt of a dialkyl sulfosuccinate of the general formula: ##STR2## wherein R 1 and R 2 each represent an alkyl group having at least 4 carbon atoms, n represents an integer of 1˜3 and M represents a metal having a valency of n, and (b) at least one lower aliphatic alcohol selected from the group consisting of a monohydric alcohol having 1˜5 carbon atoms, a polyhydric alcohol having 2˜5 carbon atoms and an alcohol with 2˜5 carbon atoms having an alkoxy group with 1˜5 carbon atoms.
Claim 3
Dependent Claim
36 words
A dispersant according to claim 1 wherein the weight ratio of the metal salt of the dialkyl sulfosuccinate (a) to the lower aliphatic alcohol (b), represented by (a)/(b) is within the range from 3/2 to 5/1.
Claim 4
Dependent Claim
101 words
A coal-oil mixed fuel containing 0.01˜10% by weight of a dispersant comprising: (a) a metal salt of a dialkyl sulfosuccinate of the general formula: ##STR3## wherein R 1 and R 2 each represent an alkyl group having at least 4 carbon atoms, n represents an integer of 1˜3 and M represents a metal having a valency of n, and (b) at least one lower aliphatic alcohol selected from the group consisting of a monohydric alcohol having 1˜5 carbon atoms, a polyhydric alcohol having 2˜5 carbon atoms, and an alcohol with 2˜5 carbon atoms having an alkoxy group with 1˜5 carbon atoms.
Claim 5
Dependent Claim
101 words
A coal-oil mixed fuel containing 0.01˜10% by weight of a dispersant comprising: (a) a metal salt of a dialkyl sulfosuccinate of the general formula: ##STR3## wherein R 1 and R 2 each represent an alkyl group having at least 4 carbon atoms, n represents an integer of 1˜3 and M represents a metal having a valency of n, and (b) at least one lower aliphatic alcohol selected from the group consisting of a monohydric alcohol having 1˜5 carbon atoms, a polyhydric alcohol having 2˜5 carbon atoms, and an alcohol with 2˜5 carbon atoms having an alkoxy group with 1˜5 carbon atoms.
Claim 6
Dependent Claim
36 words
A mixed fuel according to claim 3 wherein the weight ratio of the metal salt of dialkyl sulfosuccinate (a) to the lower aliphatic alcohol (b), represented by (a)/(b), is within the range from 3/2 to 5/1.
Claim 7
Dependent Claim
19 words
A mixed fuel according to claim 3 wherein the coal/oil ratio is within the range of 1.5˜0.9 by weight.
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) | 1982-12-03 | 1983-06-04 | 1983-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-03 | 1987-06-04 | 1987-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-03 | 1991-06-04 | 1991-12-04 | $7700.00 | Window Closed / Lapsed |