EP0092142A1 - Water slurries of carbonaceous materials - Google Patents
Water slurries of carbonaceous materials Download PDFInfo
- Publication number
- EP0092142A1 EP0092142A1 EP83103529A EP83103529A EP0092142A1 EP 0092142 A1 EP0092142 A1 EP 0092142A1 EP 83103529 A EP83103529 A EP 83103529A EP 83103529 A EP83103529 A EP 83103529A EP 0092142 A1 EP0092142 A1 EP 0092142A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- coal
- carbonaceous materials
- weight
- slurry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
- C10L1/326—Coal-water suspensions
Definitions
- This invention relates to water slurries of carbonaceous materials and more particularly to water slurries of coal stabilized with metal salts such as sodium salts of naphthalenesulfonic acid formaldehyde condensates.
- Transport is one of the major problems involved in use of particulate carbonaceous materials such as coal.
- Aqueous slurries of finely ground coal containing over 55 weight percent solids are difficult to pump with slurry pumps because as the solids level is increased above 50 weight percent the water and solids tend to separate causing coal particles to build up in various areas in the pumping system. This dewatering of the slurry causes blockage and jamming in the pumping system.
- U.S. Patent No. 4,282,006 - Funk issued August 4, 1981, describes a pipeline pumpable coal water, slurry having a high content of coal particles with a minimum of void spaces and a maximum of particle surface area to enhance dispersing effects generated by electrolytes and/or dispersing agents added to the slurry.
- One of the preferred dispersing agents is the sodium salt of a condensed naphthalenesulfonic acid.
- a metal salt such as a sodium salt of a naphthalenesulfonic acid formaldehyde condensate is added to a water slurry of carbonaceous materials such as a water slurry of coal in an amount sufficient to reduce the viscosity of the slurry to improve pumpability. From about 0.05 to about 0.1 parts by weight of the sodium salt of the condensate may be added to 250 parts by weight of a coal water slurry containing from about 40 to about 60% by weight of coal.
- Metal salts such as sodium salts of naphthalenesulfonic acid formaldehyde condensates are prepared by neutralizing naphthalenesulfonic acid formaldehyde condensates obtained by condensing formaldehyde and naphthalenesulfonic acid using a molar ratio of about 1 to about 3 moles of formaldehyde per mole of sulfonic acid. This condensation is carried out at temperatures from about 60°C to about 100°C, preferably from about 95°C to about 100°C. The condensation can be carried out until the condensate has specific properties such as the viscosities of aqueous salt solutions mentioned in U.S. Patent No.
- carbonaceous materials encompasses solid particulate carbonaceous fossil fuel materials which may have been powdered or pulverized to a size where 80% or more will pass through a 200 mesh screen.
- Useful carbonaceous materials include bituminous and anthracite coals, coke, petroleum coke, lignite, charcoal, peat, admixtures thereof and the like. These materials are crushed and milled to obtain finely divided particles suitable for use in formulation of pumpable water slurries of carbonaceous materials.
- Water used in the slurry may be any available water, such as mine, well, river, or lake water or desalinated ocean water having a sufficiently low mineral salt content such that the electrochemistry of the bound water layer and carrier water interface can be controlled and corrosion of milling facilities, pipelines and furnaces will be minimized and controllable.
- An effective amount of a sodium salt of a naphthalenesulfonic acid formaldehyde condensate sufficient to reduce viscosity of the slurry to improve pumpability is added as a dispersing agent to the carbonaceous materials water slurry.
- Concentration of the sodium salt of the condensate added can be added up to 10% by weight, preferably from about 0.01% by weight to about 5.0% by weight. These concentrations of dispersing agent reduce viscosities of slurries to improve their pumpability.
- Black Mesa coal was a western United States sub-bituminous type coal from Arizona deposits having a dry specific gravity of 1.45 and a equilibrium moisture of about 11% by weight. Its ash content was about 10 percent. Solids concentration of the Black Mesa slurry ranged from about 44 to about 50% by weight of the above coal with balance of the slurry being water.
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Liquid Carbonaceous Fuels (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
A metal salt such as the sodium salt of a naphthalenesulfonic acid formaldehyde condensate is added to water slurry of carbonaceous materials such as a coal water slurry in an amount sufficient to reduce viscosity of the slurry to improve pumpability. From about 0.05 to about 0.1 parts by weight of the sodium salt of the condensate may be added to 250 parts by weight of a coal water slurry containing from about 40 to about 60% by weight of coal.
Description
- This invention relates to water slurries of carbonaceous materials and more particularly to water slurries of coal stabilized with metal salts such as sodium salts of naphthalenesulfonic acid formaldehyde condensates.
- Transport is one of the major problems involved in use of particulate carbonaceous materials such as coal. Aqueous slurries of finely ground coal containing over 55 weight percent solids are difficult to pump with slurry pumps because as the solids level is increased above 50 weight percent the water and solids tend to separate causing coal particles to build up in various areas in the pumping system. This dewatering of the slurry causes blockage and jamming in the pumping system.
- Decreasing the weight percent of water in aqueous coal slurries is desirable because water is a major contributor to the cost of transport and processing operations. Further, water may be in short supply when coal is introduced into a pipeline so conservation of water may be desirable. The less water transported the greater is the volume of coal that can be moved, resulting in transport efficiencies. Also, during burning of coal, a significant amount of heat is required to vaporize the water vehicle. As the weight percent of the water vehicle decreases, the efficiency of the coal burning process increases. A method which allows the use of higher weight percent solids aqueous coal slurries than were heretofore feasible would be of great importance.
- U.S. Patent No. 4,282,006 - Funk, issued August 4, 1981, describes a pipeline pumpable coal water, slurry having a high content of coal particles with a minimum of void spaces and a maximum of particle surface area to enhance dispersing effects generated by electrolytes and/or dispersing agents added to the slurry. One of the preferred dispersing agents is the sodium salt of a condensed naphthalenesulfonic acid.
- A metal salt such as a sodium salt of a naphthalenesulfonic acid formaldehyde condensate is added to a water slurry of carbonaceous materials such as a water slurry of coal in an amount sufficient to reduce the viscosity of the slurry to improve pumpability. From about 0.05 to about 0.1 parts by weight of the sodium salt of the condensate may be added to 250 parts by weight of a coal water slurry containing from about 40 to about 60% by weight of coal.
- Metal salts such as sodium salts of naphthalenesulfonic acid formaldehyde condensates are prepared by neutralizing naphthalenesulfonic acid formaldehyde condensates obtained by condensing formaldehyde and naphthalenesulfonic acid using a molar ratio of about 1 to about 3 moles of formaldehyde per mole of sulfonic acid. This condensation is carried out at temperatures from about 60°C to about 100°C, preferably from about 95°C to about 100°C. The condensation can be carried out until the condensate has specific properties such as the viscosities of aqueous salt solutions mentioned in U.S. Patent No. 3,277,162 - Johnson, issued October 4, 1966 or the elution volumes in U.S. Patent No. 4,164,426 - Sinka et al, issued August 14, 1979. Other useful metal salts include potassium, lithium, calcium, magnesium and the like salts. Naphthalenesulfonic acid and formaldehyde, as well as naphthalenesulfonic acid -condensates and their sodium salts, are well known articles of commerce.
- The term "carbonaceous materials", as used herein, encompasses solid particulate carbonaceous fossil fuel materials which may have been powdered or pulverized to a size where 80% or more will pass through a 200 mesh screen. Useful carbonaceous materials include bituminous and anthracite coals, coke, petroleum coke, lignite, charcoal, peat, admixtures thereof and the like. These materials are crushed and milled to obtain finely divided particles suitable for use in formulation of pumpable water slurries of carbonaceous materials.
- Water used in the slurry may be any available water, such as mine, well, river, or lake water or desalinated ocean water having a sufficiently low mineral salt content such that the electrochemistry of the bound water layer and carrier water interface can be controlled and corrosion of milling facilities, pipelines and furnaces will be minimized and controllable.
- An effective amount of a sodium salt of a naphthalenesulfonic acid formaldehyde condensate sufficient to reduce viscosity of the slurry to improve pumpability is added as a dispersing agent to the carbonaceous materials water slurry. Concentration of the sodium salt of the condensate added, based on the total weight of the carbonaceous materials water slurry, can be added up to 10% by weight, preferably from about 0.01% by weight to about 5.0% by weight. These concentrations of dispersing agent reduce viscosities of slurries to improve their pumpability.
- For a fuller understanding of the nature and advantages of this invention, reference may be made to the following examples. These examples are given merely to illustrate the invention and are not to be construed in a limiting sense. All quantities, proportions and percentages are by weight and all references to temperature are °C unless otherwise indicated.
- Samples of Black Mesa pipeline coal water slurries were treated with the quantities of sodium salts of naphthalenesulfonic acid formaldehyde condensate solutions shown in the table below. Black Mesa coal was a western United States sub-bituminous type coal from Arizona deposits having a dry specific gravity of 1.45 and a equilibrium moisture of about 11% by weight. Its ash content was about 10 percent. Solids concentration of the Black Mesa slurry ranged from about 44 to about 50% by weight of the above coal with balance of the slurry being water.
-
- While the invention has been described with reference to certain specific embodiments thereof, it is understood that it is not to be so limited since alterations and changes may be made therein which are within the full intended scope of the appended claims.
Claims (6)
1. In a water slurry of carbonaceous materials composition comprising water and carbonaceous materials, the improvement of having present therein an effective amount of a metal salt of a naphthalenesulfonic acid formaldehyde condensate sufficient to improve pumpability.
2. The composition of claim 1 where the metal salt is the sodium salt.
3. The composition of claim 1 or 2 wherein there is present up to about 10% by weight of the condensate.
4. The composition of claim 3 wherein there is present from about 0.01 to about 5% by weight of the condensate.
5. The composition of one of the preceding claims wherein the carbonaceous materials are coal.
6. In a process of pumping a water slurry of carbonaceous materials composition in a pipeline, the improvement comprising having present the composition of one of the preceding claims.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US37009882A | 1982-04-20 | 1982-04-20 | |
US370098 | 1982-04-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0092142A1 true EP0092142A1 (en) | 1983-10-26 |
Family
ID=23458215
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83103529A Withdrawn EP0092142A1 (en) | 1982-04-20 | 1983-04-12 | Water slurries of carbonaceous materials |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0092142A1 (en) |
JP (1) | JPS58189027A (en) |
AU (1) | AU554666B2 (en) |
CA (1) | CA1179133A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994001684A1 (en) * | 1992-07-06 | 1994-01-20 | Eniricerche S.P.A. | Process for recovering and causing highly viscous petroleum products to flow |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61225287A (en) * | 1985-03-29 | 1986-10-07 | Tsuneo Masuda | Carbide-water slurry, process and apparatus for production thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4330301A (en) * | 1979-07-26 | 1982-05-18 | Kao Soap Co., Ltd. | Dispersant for aqueous slurry of coal powder |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5350202A (en) * | 1976-10-19 | 1978-05-08 | Dai Ichi Kogyo Seiyaku Co Ltd | Additives for mixtures of pulverized coals and oils |
-
1982
- 1982-07-05 CA CA000406587A patent/CA1179133A/en not_active Expired
-
1983
- 1983-04-12 EP EP83103529A patent/EP0092142A1/en not_active Withdrawn
- 1983-04-15 AU AU13562/83A patent/AU554666B2/en not_active Ceased
- 1983-04-18 JP JP58068257A patent/JPS58189027A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4330301A (en) * | 1979-07-26 | 1982-05-18 | Kao Soap Co., Ltd. | Dispersant for aqueous slurry of coal powder |
Non-Patent Citations (1)
Title |
---|
PATENTS ABSTRACTS OF JAPAN, Section C, vol. 5, no. 71, 13th May 1981, page 116C54 & JP - A - 56 21636 (KAO SEKKEN K.K.) 28-02-1981 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994001684A1 (en) * | 1992-07-06 | 1994-01-20 | Eniricerche S.P.A. | Process for recovering and causing highly viscous petroleum products to flow |
US5445179A (en) * | 1992-07-06 | 1995-08-29 | Eniricerche S.P.A. | Process for recovering and causing highly viscous petroleum products to flow |
Also Published As
Publication number | Publication date |
---|---|
AU1356283A (en) | 1983-10-27 |
CA1179133A (en) | 1984-12-11 |
JPS58189027A (en) | 1983-11-04 |
AU554666B2 (en) | 1986-08-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19840228 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: DIAMOND SHAMROCK CHEMICALS COMPANY |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Withdrawal date: 19860418 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: ADRIAN, NORMAN F. Inventor name: FLEMING, JOSEPH P. |