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US4597770A
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Coal-water slurry compositions
Assignee: Procter and Gamble Co
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Filing: 1984-12-24
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Granted: 1986-07-01
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Expires: 2004-12-24
Abstract
Abstract Aqueous coal slurries comprising comminuted coal, water and sulfated O-glycoside surfactant. The sulfated O-glycoside serves as a highly efficient dispersant for the coal particles, permitting the achievement of low viscosity slurries at low surfactant usage levels.
Inventors
- 👤 Joseph T. Forand
- 👤 James A. Hellyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:33
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/32; C10L1/326; C09; C09K; C09K23/00; C09K23/56; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
177 words
Coal-water slurry compositions comprising: (a) from about 50% to about 85% of finely divided coal particles having a particle size such that substantially none of said particles has a size greater than 4 Tyler mesh; (b) from about 0.01% to about 5.0% of sulfated O-glycosides having the formula RO(R'O).sub.t --(Z).sub.x --(SO.sub.4 M).sub.n wherein R is selected from the group consisting of substituted and unsubstituted aliphatic and aromatic hydrocarbons having from 6 to about 32 carbon atoms, wherein the substituents are nonionic groups consisting of carbon, hydrogen, oxygen and combinations thereof, R' is selected from substituted and unsubstituted alkyl groups having from 2 to 4 carbon atoms, wherein the substituent is hydroxy, t is a single number or distribution of numbers from 0 to about 30, Z is the residue of a reducing monosaccharide, x is a single number or distribution of numbers from 1 to about 10, n is a single number or distribution of numbers from 1 to 3x+1, and M is an inorganic or organic cation; and (c) from about 10% to about 50% water.
Claim 2
Dependent Claim
177 words
Coal-water slurry compositions comprising: (a) from about 50% to about 85% of finely divided coal particles having a particle size such that substantially none of said particles has a size greater than 4 Tyler mesh; (b) from about 0.01% to about 5.0% of sulfated O-glycosides having the formula RO(R'O).sub.t --(Z).sub.x --(SO.sub.4 M).sub.n wherein R is selected from the group consisting of substituted and unsubstituted aliphatic and aromatic hydrocarbons having from 6 to about 32 carbon atoms, wherein the substituents are nonionic groups consisting of carbon, hydrogen, oxygen and combinations thereof, R' is selected from substituted and unsubstituted alkyl groups having from 2 to 4 carbon atoms, wherein the substituent is hydroxy, t is a single number or distribution of numbers from 0 to about 30, Z is the residue of a reducing monosaccharide, x is a single number or distribution of numbers from 1 to about 10, n is a single number or distribution of numbers from 1 to 3x+1, and M is an inorganic or organic cation; and (c) from about 10% to about 50% water.
Claim 3
Dependent Claim
18 words
The composition of claim 1 wherein at least 40% of the coal particles are smaller than 200 mesh.
Claim 4
Dependent Claim
53 words
The composition of claim 2 wherein Component (b) is incorporated into said composition as a 0.1% to 100% active sulfated O-glycoside product, the remainder of said product comprising unsulfated O-glycosides, sulfated and unsulfated aliphatic or aromatic alcohol(s), sulfated and unsulfated saccharide(s) and polysaccharides, or other crude reaction products; carrier fluids; coal; or co-additives.
Claim 5
Dependent Claim
26 words
The composition of claim 3 wherein the ionic character of the slurry is increased by the addition of from about 0.01% to about 3% ammonium hydroxide.
Claim 6
Dependent Claim
17 words
The composition of claim 3 wherein the composition contains up to about 1.0% of a suspending agent.
Claim 7
Dependent Claim
17 words
The composition of claim 3 wherein the composition contains up to about 0.5% of an antimicrobial agent.
Claim 8
Dependent Claim
17 words
The composition of claim 3 wherein the composition contains up to about 0.5% of a defoaming agent.
Claim 9
Dependent Claim
46 words
The composition of claim 3, 4, 5, 6 or 7 wherein R in the sulfated O-glycoside is C 8 -C 22 alkyl or alkenyl, t equals 0, Z is a glucosyl moiety, x is from 1 to about 3, and n is from 1 to 10.
Claim 10
Dependent Claim
21 words
The composition of claim 8 wherein the amount of Component (b) is from about 0.05% to about 4% of said composition.
Claim 11
Dependent Claim
21 words
The composition of claim 8 wherein the amount of Component (b) is from about 0.1% to about 2.5% of said composition.
Claim 12
Dependent Claim
21 words
The composition of claim 9 wherein the anount of Component (a) in said composition is from about 60% to about 75%.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |