CN1007733B - Coal water slurry composition based on low rank carbonaceous solids - Google Patents
Coal water slurry composition based on low rank carbonaceous solidsInfo
- Publication number
- CN1007733B CN1007733B CN86106456A CN86106456A CN1007733B CN 1007733 B CN1007733 B CN 1007733B CN 86106456 A CN86106456 A CN 86106456A CN 86106456 A CN86106456 A CN 86106456A CN 1007733 B CN1007733 B CN 1007733B
- Authority
- CN
- China
- Prior art keywords
- coal
- composition
- area
- slurry
- carbon solid
- 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.)
- Expired
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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
Abstract
The invention relates to a coal water slurry composition based on low rank carbonaceous solid, characterized in that it contains a minor portion of high rank carbonaceous solid, the high rank carbonaceous solid being milled to a finer average size than the lower rank carbonaceous solid.
Description
The coal water mixed base fuel technology that occurs in 20 years is a possible solution for the insecure fuel supply of power industry in the past.As the many patents of this area confirm like that, the coal-water mixture technology provides makes fines and the water method for basic fuel, wherein improves the pumpability and the incendivity of the solids concn and this coal slurry fuel of fuel with the different chemical material.
Though fully can be talkative from technology with proved that economically coal-water mixture can be used to alternative fuel oil, it is same that to require significantly to improve the prior art state also be correct so that make full use of the thought of the potential benefit of coal water fuel.
For example, United States Patent (USP) 4,282, disclose in No. 006 make require to contain the particle of unique size-grade distribution of disperseing chemical substance and water in conjunction with forming particularly advantageous coal slurry fuel, United States Patent (USP) 4 in addition, disclose in 358, No. 293 to use and be combined with a certain hydrophobic parts and comprise that at least the non-ionic surface active material of the hydrophilic parts of 100 oxyethane repeated monomers makes the method for coal slurry in water.Especially disclose a kind of method that purifies duff in this patent, it comprises that using various chemical substances and oil that coal particle is carried out pre-treatment makes their surface be oleophylic and hydrophilic nmature.Like this, thus water and nonionogenic tenside make the coal slurryization of purifying make directly burnt fuel.This fuel also may contain various salt and polymer stabilizer, and this stablizer makes pretreated coal particle keep suspended state.
United States Patent (USP) 4,470,828 disclose the coal water slurry fuel composition that has improved stability and pumpability.The composition of some chemical substance is the reason that produces these advantageous effects.Thus, this patent has proposed the esterification products with special anion surfactant and polyether glycol or this compound, and with the phosphatization of this compound, sulphating or carboxylation product are used in combination.
This saying shows that this effective duff water slurry can distribute by noting control size, and the selection of the condition of surface of coal and dispersion chemical substance prepares.At United States Patent (USP) 4,501, also proposed different coals is sneaked into this coal slurry in No. 205.This patent has proposed (the 7th row, the 17th～25 row) and has used at least a thick carbonaceous components, and bituminous coal and at least a thin carbonaceous components as hard coal or low volatility as brown coal, serve as the solid of this coal slurry.In other words, this patent has proposed to use at least two kinds of coals to constitute the solid of coal slurry, the more rudimentary coal of this in view of the above fine-grained components, the higher coal of this coarsness component.
At present a main drawback of coal one water mixture fuel technology is seemingly along with the reduction of used coal grade, and the requirement of disperseing chemical substance is increased and it disperses the efficient of chemical substance reducing greatly.This situation is very regrettable, because the lower grade coal promptly has the cost of winning of the coal of comparison elevated oxygen level to be lower than high-grade coal usually significantly, the cost of winning of the coal of comparison low oxygen content is arranged promptly.Based on than the coal slurry fuel potential of grizzle alternative fuel, can potential provide the economic benefit of highly significant as the fuel oil of producing by limited resources that lacks day by day.Also sulphur concentration is very low gives tangible environmental advantages to the raw material that the inferior grade coal is made coal slurry fuel owing to containing; In fact, the sulphur content of the coal of lower grade is lower than the sulphur content of high-grade coal of the coal-water mixture fuel feedstocks of present use.
Nearest publication, " kind of coal; the purifying of tensio-active agent and coal is to the influence of the rheological property of coal-water mixture " (Kaji et al. for example, 5th International Symposi um on Coal Slurry Combustion and Technology, U.S.DOE, Tampa, Florida, April 25～27,1983) pointed out higher oxygen content in, be that common ultimate analysis oxygen level surpasses about 6～8%(weight) (ASTM method D3176-74(1979), anhydrous mineral matter base) coal is before they flow, even under low-down solids concn, also need to add a large amount of tensio-active agents.In fact, when using according to United States Patent (USP) 4,358,293 non-ionic surface active dispersion agents that propose or for example at United States Patent (USP) 4, during the anionic dispersing agents pointed out in 504,277, find the lower grade coal, be oxygen level greater than 6～8%(ASTM D3176-74, anhydrous mineral matter base) coal usually need a large amount of dispersion agents.High like this add-on makes the production cost of coal slurry fuel high to the degree that influences its economic and practical.
We find unexpectedly, can prepare coal-water syrup with grizzle, wherein solids concn and chemical additive all be in than containing quite in a large number of being fit to be reported than in the more suitable scope of the coal slurry of grizzle.According to the present invention, this can obtain by using the coal of being made up of than high-rank coal than grizzle and small portion major part, and high-rank coal wherein has the mean particle size littler than grizzle.
The surface-area of this thin component be at least about total coal slurry solid surface long-pending 40%, wherein preferably the oxygen level of advanced at least coal is big by 2% than the oxygen level of grizzle.This preferably have about 6% oxygen level than grizzle, and preferably have oxygen level less than 6% than high-rank coal.
Requirement to the chemically active surface dispersion agent that is used for this coal slurry is very strict, but have been found that to comprise hydrophobic and chemically active surface dosage particularly suitable hydrophilic radical and that have at least 40 epoxy hexane repeated monomers, they can use separately or be used with other tensio-active agent.We find that it all is very effective glidant for the coal of numerous species that this surfactivity is disperseed chemical agent, and be disclosed in the U.S. 4,549, No. 881 patents and the U.S. Patent application of submitting to June nineteen eighty-three 492, No. 196, and be 4 on January 21st, 1986 approval, 565, in No. 549 the United States Patent (USP), and accordingly openly in Swedish patent application 8202879-6 number (open) and corresponding November 24 nineteen eighty-three disclosed European Patent Convention publication W083/04044 number November 7 nineteen eighty-three, other dispersion agent that is suitable for 4,504,277,4,470,828 and 4,282, what known various ion dispersion agents were used in combination in No. 006 United States Patent (USP) is identical.
But with 4,501, it is opposite that No. 205 United States Patent (USP)s are narrated, and the thin component of bonded solid must thicker component grade height in the coal slurry fuel composition, promptly contains the coal oxygen still less of thicker component.This thin component can be made up of as petroleum slag or solid bituminite a kind of advanced coal or other hydrophobic carbon solid arbitrarily.We also find, if solid thinner, more hydrophobic in forming and the surface-area that contains the less part of oxygen greater than solid total surface area in the coal slurry fuel composition, and its weight is less than a half of coal slurry solid weight, improvement effect is remarkable especially.
But use special benefits that the present invention realized be this pump fortune and directly the incendiary coal slurry fuel can produce under the much higher concentration during than grizzle than independent use, and this coal slurry fuel can with than independent use during than grizzle the dispersion agent of lower amount produce.Thereby, can use not too expensive coal to produce this fuel, also can produce this fuel, because low its efficiency of combustion of water content will obviously improve with more a spot of chemical substance.As the following example show, produced the similar result of coal slurry to the small number of combinations preparation of only using this coal slurry fuel by the coal slurry fuel of the present invention preparation.It should be noted if select many group coal or carbon solids for use rather than select for use a kind of coal or carbon solid to constitute coal slurry fuel solid two components, as long as the minority solid fuel has on average than the lower oxygen level of the most components of this coal slurry fuel solid, and present higher hydrophobicity, also will realize same advantageous effects.When constituting this coal slurry fuel solid, can reach the most significant improvement than the solid surface-area of hydrophobic part a half greater than coal slurry fuel solid total surface area.The surface-area that general higher coal has is at least the twice of effect than the grizzle surface-area, and best three times, be noted that especially the surface-area here is meant exterior surface area, that is, do not comprise pore surface area.
For example can be by using Coulter Cornter, Microtrac or Malvern Instrument measuring size-grade distribution decide this surface-area, and it is long-pending to calculate spherical surface of equal value according to its result.Suppose the shape of spheroidal particle from the measurement of particle volume, this method is coarse, and still, it reaches tolerance range has been enough to implement the present invention, as long as two groups of coal slurry fuel solid outer surface areas are measured with method of the same race.
In the embodiment of this invention, the used coal or the oxygen level of other carbon solid are to measure by the standard method of ASTM, and this method is to carry out ultimate analysis with anhydrous mineral matter base to determine the oxygen level of coal (ASTM D3176-74).Shown in following embodiment, its oxygen level is up to 8%(weight), preferably about 6%(weight) coal or other carbon solid are convenient to the minority components by weight percent as coal in this coal slurry fuel, be higher than 6%(weight and contain), more preferably greater than about 8%(weight) the coal of oxygen level be suitable for and make most components by weight percent.The solid-fuelled example of preceding group has hard coal, low volatility bituminous coal and petroleum slag, and brown coal, sub-bituminous coal and more rudimentary (that is, high-volatile) bituminous coal are the applicable raw materials in back a group.
Provide the following example only in order to explanation, but do not constitute qualification of the present invention.
Embodiment 1-7
Select two kinds of coals.To be 5.1%(ASTM D-3176-74ultimate analysis from the oxygen level of Tenncssee Consolidated coal company, chinley coal dmmf) grinds to form that to contain diameter be 96%(weight less than 16 microns particle) fine powder.This coal component is to call coal " A-1 " in the following text.Prepare another component, wherein coarse particles diameter is about 44 microns.This component is to call coal " A-2 " in the following text.For the coal that higher oxygen content is arranged, select for use and originate from Hokkaido, Japan, sub-bituminous coal.This coal is called the Taiheiyo coal, contain 13% oxygen (ASTM D3176-74 ultimate analysis, dmmf).This coal is levigate, make it reach 99%(weight) particle have diameter less than 210 microns.This component is to call coal " B " reference example in the following text
Grinding to form maximum particle diameter is 210 microns, and the total outside surface of particle is that the Taiheiyo coals of 34 square metres/100 gram coals can only be slurried into solids concn and are not more than about 66%(weight) coal slurry, while gained coal slurry has enough pumpabilities.Used dispersion agent is the nonionic ethoxylation binonylphenol with about 70 oxyethane repeated monomers.For the purpose of direct contrast, the dispersion agent of a kind is used for embodiment 1 to 11.It should be noted that handling under the coal slurry mixture situation, we find that the special mixture of ion dispersion agent and important non-ionic dispersing agent all is very effective in many cases.Preferably non-ionic or be that non-ionic form is for comprising more than about 40 oxyethane repeated monomers substantially.
Based on the coal slurry of Taiheiyo coal at 100 seconds
-1Velocity of shear, coal amount be 65.8% and every kilogram of coal to need the viscosity under the 15.2 gram dispersion agent conditions be 840 centipoises.
The bituminous coal that to take from Tennessee Consolidated coal company grinds to form and fineness and size-grade distribution like the Taiheiyo coal facies.Can prepare with this coal and to contain the coal amount and substantially exceed 70%(weight) coal slurry.Containing coal 70%(weight) under the situation, this coal slurry was at 100 seconds
-1Viscosity when velocity of shear and every kilogram of coal need with 7.8 gram dispersion agents is 200 pools li.Under 68% coal amount situation, corresponding viscosity is about 100 centipoises, and the requirement of dispersion agent is every kilogram of coal 7.3 grams.
Embodiment 1(is continuous)
With 25%(weight) " A-2 " coal and 75%(weight) " B " coal to be mixed and made into a kind of solids concn be 65% coal water slurry.When mixing under this ratio, " A-2 " coal provides the about 60% of coal particle total surface area, because the surface-area of " A-2 " coal is 89.5 square metres in per 100 gram coals, the surface-area of " B " coal is 20.2 square metres in per 100 gram coals.
When dispersing agent requirement is every kilogram of coal 13.3 gram, will draw the expection viscosity of coal slurry of 655 centipoises according to linear prediction with each pulp result of this coal.
In the dispersion agent add-on is that the practical viscosity result is 410 centipoises under the situation of every kilogram of coal 9.6 grams.Therefore, be incorporated in the coal slurry by the coal with low levels and high-content oxygen, containing the lower coal of oxygen simultaneously is minor component by weight, and the quite most of of total outer surface area is provided in addition, makes the unexpected reduction of viscosity and dispersing agent requirement.
Embodiment 2-7(is continuous)
See Table 1 show with prepared coal per-cent carry out other 6 times the test the result.
As shown in the Examples, under by the less important weight percentage situation of coal, when the surface-area that is provided is big as far as possible, can obtain optimum at arbitrary given this coal than low oxygen content.As about 5% time greater than total surface of the surface-area of minor component by weight, can obtain optimum, in lower scope although these improvement are observed.When use relatively in a small amount than the coal of low oxygen content the time, these improvement of back are significant.Embodiment 7 has shown an interesting result, can be 68.2% time slurrying at solids concn with the Taiheiyo coal, this coal slurry have than pure " Taiheiyo " coal slurry 66% time lower viscosity of the accessible coal concentration of maximum and need than its institute dispersion agent that requires still less.Also express in other experiment, improve in order to reach any coal slurry, when using high and low oxygen content coal, different components even improvement is arranged, also is inapparent about equally the time, unless will contain the lower coal of oxygen as main components by weight percent.But, in this point, when the result who obtains when the coal slurry for preparing respectively from two kinds of components carries out linear interpolation, the gained result just not can with predetermined departing from.In addition in some other test, when containing the higher coal of oxygen, do not find favourable result as a small amount of components by weight percent of mixed pulp.
Embodiment 8 and 9
Select two kinds of different coals, a kind ofly can easily be higher than 70%(weight at solids concn) slurrying down, it could be 67%(weight at solids concn that another kind only overcomes some difficulties) under make coal slurry.Before a kind of coal by Cape Breton Denelopment Corporation, Nova Acottia, Canada provides from the Harbour Seam Lingan ore deposit.This coal has 4.3% oxygen level (ASTM D3176-74, ultimate analysis, dmmf), and the dispersion agent that needs about 5.5 gram/kilogram coals to generate solids concn be 67% coal slurry, at this moment particle overall dimension is about 210 microns, and the per 100 gram coals of particulate surface-area are about 36 square metres.At solids concn is under 70% situation, and this coal is slurrying under every kilogram of coal 7.1 grams in dispersing agent requirement.A kind of coal in back is from the Kayenta Mine, Arizona's, oxygen level is a 13.9%(weight) (ASTM D3176-74, ultimate analysis, sub-bituminous coal dmmf).This coal can not be higher than 67% time slurrying at solids concn, and particulate overall dimension is 210 microns, and total outer surface area is about 36 square metres/100 grams, even be slurrying in 67% o'clock at solids concn, the requirement of dispersion agent is every kilogram of coal 29.2 grams.See Table 2.
For carrying out embodiment 8 and 9, it is 210 microns particle that the Kayenta coal grinding is become overall dimension, the particulate outside surface is per 100 25.2 square metres in coals of gram, and it is 27 microns particle that the Lingan coal grinding is become overall dimension, and the particulate outer surface area is 137 square metres in per 100 gram coals.The results are shown in Table 3 for the gained coal slurry.
This obtained when having expressed according to various mixed coal component of the present invention in the improvement aspect dispersing agent requirement and the viscosity of coal slurry.Obtained the better result that estimates than linear interpolation.
Embodiment 10 and 11
To take from Filipine oxygen level is 19%(ASTM D3176-74, and ultimate analysis, brown coal dmmf), Semirara coal are as the thick component in the coal slurry, and wherein this coal mixes with different content with " A-1 " component among the embodiment 1～7.At maximum solids concn 55%, dispersing agent requirement is to make coal slurry under every kilogram of about 69 grams of coal with the Semirara brown coal, and wherein the coal slurry solid has 210 microns maximum particle size and the about 35 square metres surface-area of per 100 gram coals.At 100 seconds
-1Under the velocity of shear, the viscosity of this coal slurry is about 1830 centipoises.Table 4 shows the result of embodiment 10 and 11.In these trials the Semirra coal grinding being become overall dimension is 210 microns particle, and surface-area is 25.2 square metres in per 100 gram coals.See Table 4.
How these embodiment can produce main coal slurry based on brown coal if having illustrated with coal composition of the present invention, the solids concn of this coal slurry only is higher than the solids concn with brown coal slurrying simultaneously, has all being lower than aspect dispersant concentration and the viscosity only to make the value that coal slurry reached that raw material is made with brown coal under maximum solids concn again.When this brown coal had than volume particle size, these advantages were than also bigger among the top embodiment.
All the foregoing descriptions have illustrated the present invention.By at least two kinds of solid carbon pledges are provided to the coal slurry composition, wherein minor component by weight comprise contain oxygen and be lower than about 8%(weight), be preferably lower than about 6%(weight) (ASTM D3176-74dmmf), and this component is ground to than the thinner mean particle size of main components by weight percent carbonaceous particle, this main components by weight percent is greater than 6%(weight by oxygen level), more preferably greater than about 8%(weight) the carbon solid material production of (ASTM D3176-74 ultimateanalysis dmmf), thereby obtained to put outstanding advantage.Coal slurry can matter uses that required still less surfactivity helps the fluidisation material to produce when only using the carbonaceous material that is made of thick component in this novel composition to prepare coal slurry.Accessible solids concn is higher and viscosity is lower.
Although shown some advantage in not containing the coal slurry composition that helps the stream chemicals, optimum obtains when helping stream and stable chemical additive to disperse carbon solid with surfactant or other.Good especially result obtains at least when this composition comprises the tensio-active agent that contains 40 oxyethane repeated monomers, tensio-active agent wherein or use separately or be used in combination with cationic, non-ionic or amphoteric ion dispersion agent.This combination, was narrated in 828 at United States Patent (USP) 4,470 by Yamamura.
In the material that the coal slurry solid of selecting to contain two kinds of variable grain components is fit to, can contain 8%(weight on average than fine particle) oxygen (ASTM D3176-74 ultimateanalysis dmmf), preferably contain 6%(weight) in all cases, in order to obtain advantage of the present invention, must contain on average than the more oxygen of minor component by weight than coarse particles.
According to the present invention, the general water content of this coal slurry can be preferably in 45～25% scopes about 50～20%.When grinding the carbon raw material of every kind of selection, granularity should contain the higher particulate overall dimension of oxygen in the thinnest size range that forms usually.If designing this coal slurry fuel is used for directly burning, above-mentioned largest particle can be about 50～300 microns an of diameter, if coal slurry is intended for use for example gasified raw material, its largest particle can be about 1500 microns, if or for example this coal slurry composition plans when concentrating block transportation or pipeline and transmit, it can be several inches of diameters.For coal slurry of the present invention, if the maximum particle diameter of composition up to about 250 microns, the maximum particle diameter of best less important weight solid ingredient is at least about 10 microns.For coal slurry particulate maximum particle diameter during up to 2 millimeters, the largest particle of less important weight solid ingredient should be at least about and mix 5% of largest particle diameter in the coal slurry.
The usability methods of production coal slurry of the present invention and coal slurry fuel can be implemented in every way.In a best approach, the coarse particles of carbon species is that special selected being used for is produced in the very thin material grinding process of production minimum individually.The equipment flowsheet example that is suitable for is the wet rod milling of closed circuit or open circuit operation.Fine particle is preferably in the custom-designed wet-milling operation of small grain size that is used for producing very and produces, as wet ball mill, mill, shake ball milling or similar devices.More fine grain grinding can advantageously be carried out in suitable helping in the presence of the stream chemical agent, this surfactivity disperses to contain at least 40 oxyethane repeated monomers, and it or use separately or use with the ion dispersant that is applicable to carbonaceous particle in the disperse water.To mix from the product flow of each grinding particle size operation then and produce product coal slurry and coal slurry fuel.The flow process that is suitable for also may comprise other operation, as one or both abrasive product delimings, various dehydration procedure and other are determined favourable known operation by those of skill in the art.
Do not leave the spirit and scope of the present invention, to compound of the present invention, composition, method, the various improvement of step and coordinator are significantly for the professional and technical personnel, and can make, and should understand that thus scope of the present invention is limited by the back claim.
Claims (8)
1, based on the coal water slurry composition of low rank carbonaceous solids, used low rank carbonaceous solids has the oxygen level higher than senior carbon solid, it is characterized in that it contains the senior carbon solid of sub-fraction, this senior carbon solid has the mean particle size thinner than low rank carbonaceous solids, and the outer surface area of wherein this thin component is at least about 40% of total coal slurry solid outer surface area.
2, composition as claimed in claim 1 helps the stream chemical agent comprising having more than the non-ionic dispersing agent of about 40 oxyethane repeated monomers.
3, composition as claimed in claim 1, wherein carbon solid comprises coal, and wherein has the oxygen level of advanced at least coal high 2% than grizzle.
4, composition as claimed in claim 1, wherein carbon solid comprises coal, and wherein has oxygen level more than 6% than grizzle.
5, composition as claimed in claim 1, wherein carbon solid comprises coal, and wherein has oxygen level less than 6% than high-rank coal.
6, composition as claimed in claim 1, wherein carbon solid comprises coal, and wherein than half greater than total solids surface-area in the composition of the surface-area of high-rank coal.
7, composition as claimed in claim 1, wherein carbon solid comprises coal, and wherein is at least than grizzle per unit weight surface-area two times than the surface-area of the per unit weight of high-rank coal.
8, composition as claimed in claim 1, wherein carbon solid comprises coal, and wherein is three times in the surface-area of per unit weight than grizzle at least than the surface-area of the per unit weight of high-rank coal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US79695985A | 1985-11-12 | 1985-11-12 | |
| US796,959 | 1985-11-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86106456A CN86106456A (en) | 1987-07-15 |
| CN1007733B true CN1007733B (en) | 1990-04-25 |
Family
ID=25169501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86106456A Expired CN1007733B (en) | 1985-11-12 | 1986-09-23 | Coal water slurry composition based on low rank carbonaceous solids |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0223755B1 (en) |
| JP (1) | JPH0794670B2 (en) |
| CN (1) | CN1007733B (en) |
| AT (1) | ATE60349T1 (en) |
| BR (1) | BR8605268A (en) |
| CA (1) | CA1310187C (en) |
| DE (1) | DE3677148D1 (en) |
| IL (1) | IL80599A0 (en) |
| ZA (1) | ZA868594B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092231C (en) * | 1999-05-28 | 2002-10-09 | 中国石油化工集团公司 | Low-grade coal modified refinery coke water slurry composition and use thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732341A (en) * | 2011-04-07 | 2012-10-17 | 通用电气公司 | Coal water slurry and preparation method thereof |
| CN103965981B (en) | 2013-01-31 | 2016-05-25 | 通用电气公司 | The apparatus and method of preparation water-coal-slurry |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4441887A (en) * | 1981-07-31 | 1984-04-10 | Alfred University Research Foundation Inc. | Stabilized slurry and process for preparing same |
| AU568660B2 (en) * | 1983-07-05 | 1988-01-07 | Babcock-Hitachi Kabushiki Kaisha | Coal-water slurry |
| JPS60156794A (en) * | 1984-01-25 | 1985-08-16 | Hitachi Ltd | Conversion of low-grade coal into slurry |
| JPS61225288A (en) * | 1985-03-29 | 1986-10-07 | Kubota Ltd | Production of coal-water slurry |
-
1986
- 1986-09-12 EP EP86850304A patent/EP0223755B1/en not_active Expired - Lifetime
- 1986-09-12 DE DE8686850304T patent/DE3677148D1/en not_active Expired - Fee Related
- 1986-09-12 AT AT86850304T patent/ATE60349T1/en not_active IP Right Cessation
- 1986-09-23 CN CN86106456A patent/CN1007733B/en not_active Expired
- 1986-10-28 BR BR8605268A patent/BR8605268A/en unknown
- 1986-11-10 CA CA000522628A patent/CA1310187C/en not_active Expired - Fee Related
- 1986-11-12 IL IL80599A patent/IL80599A0/en not_active IP Right Cessation
- 1986-11-12 JP JP61267875A patent/JPH0794670B2/en not_active Expired - Fee Related
- 1986-11-12 ZA ZA868594A patent/ZA868594B/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092231C (en) * | 1999-05-28 | 2002-10-09 | 中国石油化工集团公司 | Low-grade coal modified refinery coke water slurry composition and use thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| IL80599A0 (en) | 1987-02-27 |
| AU586512B2 (en) | 1989-07-13 |
| BR8605268A (en) | 1987-07-28 |
| EP0223755A3 (en) | 1988-09-21 |
| CN86106456A (en) | 1987-07-15 |
| CA1310187C (en) | 1992-11-17 |
| EP0223755A2 (en) | 1987-05-27 |
| ZA868594B (en) | 1987-10-28 |
| JPS62119297A (en) | 1987-05-30 |
| EP0223755B1 (en) | 1991-01-23 |
| DE3677148D1 (en) | 1991-02-28 |
| ATE60349T1 (en) | 1991-02-15 |
| AU6496186A (en) | 1987-05-14 |
| JPH0794670B2 (en) | 1995-10-11 |
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