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WO/1992/003522A1 |
In a process for producing and compacting a fuel, a coal fraction, a waste fraction consisting of organic residues from industrial and domestic waste and a chalk fraction of unslaked lime are used. To reduce the quantity of lime required...
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WO/1991/011502A1 |
An improved solid fuel and improved liquid fuel are obtained from a feed coal and feed oil by a method which comprises the steps of: (a) forming microagglomerates of finely divided coal; (b) combining said microagglomerates generated fro...
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WO/1991/007478A1 |
Organic sulfur is removed from coal by extraction with a water/methanol/carbon dioxide mixture under supercritical conditions of temperature and pressure. The preferred solvent used for extraction has the following composition (expressed...
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WO/1991/006617A1 |
An apparatus and process of steam treating carbonaceous materials under a controlled temperature and pressure. The feed material is introduced into an autoclave or similar vessel and injected with steam at a high pressure and temperature...
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WO/1991/006618A1 |
A method of beneficiating a particulate carbonaceous material such as coal, including formation of a slurry of the material in an aqueous salt solution. The slurry is separated in a cyclone into a low-density fraction and a high-density ...
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WO/1991/005735A2 |
The active carbon is produced by microwave-induced pyrolysis of a carbonaceous material in an atmosphere containing no more than 5 % oxygen so as to inhibit flame generation. The resulting product is treated with an acid (so as to wash o...
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WO/1991/004310A1 |
This invention relates to the reduction of oxidized sulfur compound SOX emissions produced during combustion of sulfur (S)-containing combustible compounds. More particularly, this invention provides a method for reducing such emissions ...
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WO/1991/003530A1 |
The present invention provides systems and methods for the beneficiation of carbonaceous materials so as to upgrade heating value, reduce moisture content, and improve handling characteristics. A reactor arrangement is provided for hydro...
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WO/1990/001530A1 |
A process is provided for removing pyritic sulfur and lowering ash content of bituminous coals by grinding the feed coal (11, 21), subjecting it to micro-agglomeration (14, 24) with a bridging liquid containing heavy oil, separating the ...
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WO/1989/009253A1 |
The emission of acid-forming gases and/or of dioxins from a refuse incineration plant is reduced and at least part of or substantially all the fly ash formed by the incineration of refuse is converted into slag, when the refuse incinerat...
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WO/1989/005340A1 |
A method and composition are provided for decreasing emissions of sulfur oxides and nitrogen oxides upon combustion of carbonaceous fuel material. In particular, the composition comprises a refined coal, having low ash-forming material a...
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WO/1989/005341A1 |
A purified culture of Ferroxifunis bagdadii capable of extracting metals from mining heaps, liquefying and desulfurizing coal, and decolorizing textile mill wastewaters.
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WO/1989/004861A1 |
A process for combusting a sulphur-bearing fuel is disclosed. A mixture of the fuel, a sulphur binding material and a sulphur retaining material is introduced into a first combustion zone. The mixture is combusted in the first zone under...
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WO/1989/002416A1 |
The invention comprises producing clean coal having a mineral matter content of less than about 5 percent by leaching feed coal (2) crushed or sized to less than about 1 inch with a mixture of hydrochloric and hydrofluoric acids (104) co...
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WO/1989/001963A1 |
A process for the selective removal or chemical modification of minerals contained in carbonaceous materials, comprising treating with an aqueous solution of a compound selected from ammonium salts, polyhydroxy alcohols, organic acids, o...
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WO/1988/010291A1 |
A method of burning solid fuel having low melting point alkaline compositions, such as alkali metal salts, particularly lignite and salty brown coal. The fuel is introduced into the reaction chamber of a fast fluidized bed reactor, and i...
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WO/1988/007072A1 |
A coal log of various shapes is comprised of cannel coal lumps having an average size range of about 1 1/4 inches to about 3.5 inches with an average size of about 2 1/3 inches, and preferably from about 1 1/2 inches to about 3 inches bo...
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WO/1988/005694A1 |
Solid carbonaceous fuel, such as bituminous coal, is copulverized (11) with a basic metal reactant to provide a microground prepared fuel predominantly in minus 325 mesh particles of high specific surface area. The prepared fuel is fed d...
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WO/1988/002007A2 |
Phenothiazine derivatives which are N-substituted and which contain an additional sulfur molecule in the N substituent.
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WO/1987/006605A1 |
A novel process which has a positive pressure dependence for the capture of noxious emissions during thermal combustion or oxidation wherein coal is impregnated with CaO at a molar ratio not exceeding 3:1, then thermally oxidized at pref...
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WO/1987/005891A1 |
Low rank coals including lignite, brown and sub-bituminous coals, and peat containing unacceptably high quantities of water are dried and enriched in BTU content. The mined low rank coal is crushed to between about one-half inch and thre...
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WO/1987/005621A1 |
A process for demineralizing coal comprising the steps of: forming a slurry of coal particles, preferably at least 50% by weight of which particles have a maximum dimension of at least 0.5mm, with aqueous solutions of an alkali which sol...
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WO/1987/005226A1 |
A process and composition for protective treatment of coal comprises applying a chemical treating agent to a major proportion of coal particles in a quantity of coal by sprays (3), (4) directed upon a falling stream of coal. The treating...
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WO/1987/003296A1 |
Carbonaceous material, including wood based material, coal, lignite, peat and like carbonaceous material, is ground to a fine state, either with or without previous drying procedures, added to water and aqueous alkali to form a paste, ex...
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WO/1987/000855A1 |
A non-pyrolyzed coal briquette comprising inorganic clay as a binder. A process for manufacturing non-pyrolyzed coal briquettes is also described which comprises contacting appropriately sized coal fines with the proper amount of inorgan...
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WO/1986/007602A1 |
A powder additive containing dicalcium phosphate and ammonium chloride in combination with 0, 1 or several of the following further ingredients: perborate, a manganese compound, salpetre, iron vitriol, magnesium sulphate and calcium nitr...
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WO/1986/004917A1 |
A process for treating carbon to reduce the ash content therein. The process involves treating the carbon with a fluorine acid solution which consists of an aqueous solution of hydrofluorosilicic acid and hydrogen fluoride, such that the...
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WO/1986/002663A1 |
Method for treating raw coal with ozone (O3) in aqueous suspension (agitated vessel 10) to modify the surface of the coal particles and release the ash constituents (separator 14) thereby permitting a more thorough separation of coal by ...
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WO/1986/001820A1 |
A system in which contaminants are removed from coal by organic action of the strains Thiobacillus ferrooxidans, Thiobacillus thiooxidants, Thiobacillus thioparus, Thiobacillus neopolitanus, Thiobacillus acidophilus, Euglenoids, Cyanochl...
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WO/1986/001528A1 |
A solid carbonaceous fuel containing up to 10% wt of calcium compounds and 0.1 to 5% wt of added iron added as oxide, carbonate or elemental iron or as as substantially halogen and sulphate-free iron-containing substances forming iron ox...
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WO/1985/003245A1 |
A process for coating coal particles including mixing at least two molar equivalents of a fatty acid or fatty ester and at least one molar equivalent of alkali reactive with the fatty acid allowing the alkali to saponify a portion of the...
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WO/1985/002556A1 |
A method of removing sulphur from coal prior to burning of the coal. The coal is first comminuted to a size of no more than one inch and preferably one-half inch in diameter. The coal particles are placed in a reaction chamber in an aque...
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WO/1985/001513A1 |
Manganese and copper-containing compositions comprising: (A) a manganese containing compound and (B) a copper containing compound, wherein said composition contains from about 0.05 up to about 23g-atoms of manganese for each g-atom of co...
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WO/1984/003516A1 |
A method for desulfurization, denitrification, and oxidation of carbonaceous fuels including a two stage oxidation technique. The carbonaceous fuel, containing ash, along with an oxygen-containing gas is introduced into a first stage par...
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WO/1984/002718A1 |
A process for the reduction of fluorides and chlorides from carbonaceous matter, such as coal, which has been leached by hydrochloric and hydrofluoric acid. The process comprises heating the leached solids (2), to initially dry the solid...
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WO/1984/002346A1 |
The risk of self-igniting or dust-explosion when handling a pulvurent peat fuel having a lower water content than 30% is eliminated by causing the individual peat particles to bind together into relatively weak non-dusting agglomerates b...
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WO/1984/000976A1 |
A fuel on the basis of waste, such as refuse, from which non-combustible and/or reusable components, have been sorted, if desired, is produced by intimately mixing the waste with lime, preferably burnt lime (CaO) or hydrated lime (Ca(OH)...
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WO/1983/004189A1 |
Methods of converting raw coals into low ash fuels which are competitive with the heavier grades of petroleum-based fuels and into other products. The raw coal is comminuted in aqueous slurry until resolved into separate, particulate pha...
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WO/1983/003619A1 |
A process for deashing coal, which comprises carrying finely pulverized coal using a non-oxidative gas stream (A), adjusting the temperature and humidity of the pulverized coal-carrying non-oxidative gas during carrying, introducing the ...
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WO/1983/001909A1 |
Apparatus for treatment of pulverant desulfurized coal to economically passivate sites from which sulfur has been extracted by treatment with a fluid passivating agent in a continuous-line operation. A longitudinally-extended travel path...
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WO/1983/001957A1 |
Continuous-line operations for desulfurizing coal utilizing fluid treatments including gaseous reactant treatment of raw coal. Raw coal is pulverized at (20) to a selected particle size classification. Moisture level is controlled to pro...
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WO/1983/001910A1 |
Apparatus for continuous-line coal desulfurization operations enabling fluid treatment, including gaseous treatment, of pulverant work product. Movement of the work product along a horizontally-oriented, longitudinally-extended treatment...
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WO/1983/000501A1 |
Thixotropic, yield-pseudoplastic coal-water slurry containing at least 65 weight percent of solid material and having a Brookfield viscosity which does not exceed 4000 centipoise under certain specified test conditions. Also described ar...
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WO/1982/003631A1 |
A method of desulfurizing coal in which chlorine gas is bubbled through an aqueous slurry of coal at low temperature below 130 degrees C, and at ambient pressure. Chlorinolysis converts both inorganic and organic sulfur components of coa...
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WO/1982/003404A1 |
A crushed hydrocarbon-bearing material containing hydrocarbon and foreign mineral constituents is dispersed in fused alkali metal caustic to remove the sulfur content and release the foreign mineral matter from the hydrocarbon material f...
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WO/1982/003224A1 |
The material is charged, optionally continuously, to a closed vessel together with oil heated to a temperature in excess of 65 C, preferably in excess of 75 C. A total gas pressure of 5-50 kPa is maintained in the vessel. The material an...
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WO/1982/002404A1 |
Processes for decreasing the sulfur content of coal and facilitating economic removal of sulfur contaminant from the treated coal. Desulfurization is undertaken by oxidizing sulfur values of coal under ambient conditions of temperature a...
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WO/1982/002057A1 |
In this processing method by heating a mixture of raw coal and hydrocarbon oils, a mixture of finely divided raw coal, a hydrocarbon heavy oil and light hydrocarbons are heated at a temperature comprised between 50 and 300 C during 0.1 t...
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WO/1981/003337A1 |
Deashing of coal is achieved by oil agglomeration and subsequent separation of a carbon oil phase. The oil is removed by steam stripping either simultaneously and/or after the coal oil agglomerates have been disintegrated. The fine coal ...
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WO/1981/002583A1 |
Process for the fractionation of a porous or fluid-permeable hydrocarbonaceous solid, such as coal, containing an admixture of mineral matter and hydrocarbonaceous matter, into a separate mineral enriched fraction and a separate hydrocar...
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