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US4363637A Expired / Lapsed US ⏱️ 0.0 years remaining

Stabilized oil slurries of carbonaceous materials

Assignee: Diamond Shamrock Chemicals Co
•
Filing: 1981-04-08
•
Granted: 1982-12-14
•
Expires: 2001-04-08
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Abstract

Abstract Mixtures of an alkoxylated quaternary salt and a nitrogen base having from zero to nine carbon atoms are added to carbonaceous materials in oil slurries such as a coal oil mixture (COM) or a coke oil mixture in an amount sufficient to stabilize the slurries during storage and dispersing at various temperatures. Useful stabilizer mixtures include a mixture of from about 99% to about 75% by weight of an alkoxylated quaternary salt which is a reaction product of a cocoamine ethoxylate and diethyl sulfate and from about 1% to about 25% by weight of a nitrogen base such as urea. The stabilizer mixtures may be added to either the oil or slurry (or during grinding of the carbonaceous material) and are effective with or without addition of water. Coal/coke oil slurries may contain from about 40 to about 90 parts by weight of oil, about 10 to about 60 parts by weight of powdered coal or coke, about 0.01 to about 6.0 parts by weight of the stabilizer mixture and about 0 to about 10 parts by weight of water.

Inventors

  • 👤 Kathy A. Knitter
  • 👤 Jose L. Villa

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 15:25
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/32; C10L1/322

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 105 words
An oil slurry of solid particulate carbonaceous material having a mixture of (a) from about 99% to about 75% by weight of an alkoxylated quaternary salt of (1) an alkoxylated primary aliphatic amine having from about 7 to about 29 carbon atoms and from about 2 to about 50 moles of an alkylene oxide having 2 to 3 carbon atoms per mole of amine, and (2) a quaternarizing agent, and (b) from about 1% to about 25% by weight of a nitrogen base having from 0 to 9 carbon atoms, the mixture being present in an amount sufficient to stabilize the slurry at elevated temperatures.
Claim 2
Dependent Claim 105 words
An oil slurry of solid particulate carbonaceous material having a mixture of (a) from about 99% to about 75% by weight of an alkoxylated quaternary salt of (1) an alkoxylated primary aliphatic amine having from about 7 to about 29 carbon atoms and from about 2 to about 50 moles of an alkylene oxide having 2 to 3 carbon atoms per mole of amine, and (2) a quaternarizing agent, and (b) from about 1% to about 25% by weight of a nitrogen base having from 0 to 9 carbon atoms, the mixture being present in an amount sufficient to stabilize the slurry at elevated temperatures.
Claim 3
Dependent Claim 21 words
The slurry of claim 1 wherein the amine is a primary aliphatic amine of about 10 to about 18 carbon atoms.
Claim 4
Dependent Claim 37 words
The slurry of claim 1 wherein the nitrogen base is selected from the group consisting of ammonia, an amine having 1 to 9 carbon atoms, an alkanolamine having 1 to 9 carbon atoms and an amino base.
Claim 5
Dependent Claim 24 words
The slurry of claim 2 wherein the amino base is selected from the group consisting of urea, thiourea, dicyandiamide, ammeline, guanamines, guanidine and melamine.
Claim 6
Dependent Claim 11 words
The slurry of claim 1 wherein the powdered coal is present.
Claim 7
Dependent Claim 11 words
The slurry of claim 1 wherein the powdered coke is present.
Claim 8
Dependent Claim 61 words
The slurry of claim 1 wherein there is present from about 40 to about 90 parts by weight of oil, about 10 to about 60 parts by weight of particulate carbonaceous material, about 0 to about 10 parts by weight of water and about 0.01 to about 6 parts by weight of the mixture of alkoxylated quaternary salt and nitrogen base.
Claim 9
Dependent Claim 27 words
The slurry of claim 1 wherein the alkoxylated quaternary salt is a salt of a cocoamine ethoxylate and diethyl sulfate and the nitrogen containing base is urea.
Claim 10
Dependent Claim 26 words
The slurry of claim 1 wherein the alkoxylated quaternary salt is a salt of cocoamine ethoxylate and diethyl sulfate and the nitrogen containing base is triethanolamine.
Claim 11
Dependent Claim 27 words
The slurry of claim 1 wherein the alkoxylated quaternary salt is a salt of a cocoamine ethoxylate and diethyl sulfate and the nitrogen containing base is diethanolamine.

References Cited (Backward Citations)

US2002645A Cited
US1940445A Cited
US1989528A Cited
US2695222A Cited
US2759975A Cited
US3088796A Cited
US3205169A Cited
US4069022A Cited
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US4201552A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1985-12-13 1986-06-14 1986-12-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-12-13 1990-06-14 1990-12-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-12-13 1994-06-14 1994-12-14 $7700.00 Window Closed / Lapsed

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