US20040149627A1 - Kerosene composition - Google Patents
Kerosene composition Download PDFInfo
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- US20040149627A1 US20040149627A1 US10/726,376 US72637603A US2004149627A1 US 20040149627 A1 US20040149627 A1 US 20040149627A1 US 72637603 A US72637603 A US 72637603A US 2004149627 A1 US2004149627 A1 US 2004149627A1
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- paraffins
- iso
- kerosene
- kerosene composition
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- 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
- C10L1/04—Liquid carbonaceous fuels essentially based on blends of hydrocarbons
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- 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
- C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
- C10L2230/08—Inhibitors
- C10L2230/088—Inhibitors for inhibiting or avoiding odor
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- 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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/42—Fischer-Tropsch steps
Abstract
A kerosene composition useful as heating fuels is provided containing at least 99 wt % of n-paraffins which have from 7 to 18 carbon atoms and/or iso-paraffins which have from 7 to 18 carbon atoms along with cyclo-paraffins which have from 9 to 18 carbon atoms and/or alkyl derivatives thereof.
Description
- The present invention relates to kerosene compositions, particularly for use as heating fuels.
- Kerosene is widely used for heating and for cooking purposes. Conventional kerosene, when used for heating purposes, has an oily smell when the kerosene is being handled on refueling and this is unpleasant for the user. Furthermore, when used in open-type stoves, such as portable stoves and fan heaters, for example, or when used in a small kitchen range for cooking purposes, for example, the combustion is incomplete upon lighting and extinguishing and there is a disadvantage in that an unpleasant smell is produced by the unburned hydrocarbons that are produced at this time.
- On the other hand, the levels of safety and comfort (low production levels of NOX, hydrocarbon compounds, CO, SO2, etc. and no accompanying smell), for example, demanded of oil stoves by the user, have also risen year by year. Furthermore, in recent years, problems have arisen with the emergence of kerosene that has been stored over the summer where with the use of such kerosene the oil stoves breakdown, and a demand for improvement in the storage stability of kerosene has also arisen. In view of these circumstances, the kerosene that is to be used in oil stoves must satisfactorily fulfill such demands of the user.
- A method in which a kerosene vaporising catalyst is used, described in JP-B-59-16814, a method in which a deodorising agent is added to the kerosene, described in JP-B-54-32003, and kerosenes comprising n-paraffins and iso-paraffins, described in JP-A-63-150380, for example, have been proposed for resolving the problems of the unpleasantness when handling and the unpleasant smell on ignition and on extinguishing, which are observed generally with kerosenes.
- However, with the method in which a kerosene vaporising catalyst is used, the catalyst deteriorates with the passage of time and so it has been difficult to maintain clean combustion over a prolonged period of time. Furthermore, the method in which a deodorising agent is added to kerosene is not very effective because of the problem that the smell is not agreeable to some people. Furthermore, although kerosenes comprising n-paraffins and iso-paraffins do not have an unpleasant smell when being handled and when being lit and extinguished and with which the exhaust gas is also clean, the production costs are greatly increased and there is therefore the problem that these kerosenes are expensive. Furthermore, kerosenes comprising iso-paraffins and n-paraffins which have 9 or 10 carbon atoms as the main components have a lower density than existing kerosenes and the fuel consumption by volume is increased, and so, for example, it is likely that the JIS specification (of the Japanese Standards Association) for fuel consumption in an oil stove will not be satisfied. Moreover, the flash point is reduced and there are also problems with safety.
- A kerosene composition is provided comprising at least 99 wt % of a) at least one n-paraffins and/or iso-paraffins, said n-paraffins and/or iso-paraffins having from 7 to 18 carbon atoms and b) at least one cyclo-paraffins and/or alkyl derivatives thereof having from 9 to 18 carbon atoms.
- Advantages of the present invention will become apparent to those skilled in the art with the benefit of the following detailed description of embodiments and upon reference to the accompanying drawings.
- FIG. 1 is a graph of the change in the Saybolt value in an oxidation stability test for Examples 1 to 3 and comparative examples 1 and 2.
- FIG. 2 is a graph of the change in the amount of peroxide in an oxidation stability test for Examples 1 to 3 and comparative examples 1 and 2.
- The present invention provides kerosene compositions, particularly for use as heating fuels, which have excellent performance. For example, they do not have an unpleasant odour when they are being handled, when they are being ignited or when they are being extinguished, the combustion exhaust gas is clean and the storage stability is high.
- The present invention is intended to provide kerosene compositions for which the cost, fuel consumption and flash point are similar to those of kerosenes in general, and with which, unlike those obtained using conventional methods, the smell of the kerosene itself is very slight, there is no unpleasant oily smell when it is being handled, with which there is no smell on ignition and extinguishing, which has good combustibility, with which the exhaust gas on combustion is clean, and which also has excellent storage stability.
- It has been found that the aforementioned aims can be realised with kerosenes which contain specified amounts of n-paraffins and/or iso-paraffins, along with cyclo-paraffins and/or alkyl derivatives thereof, which all have specified numbers of carbon atoms, in place of the conventional kerosenes obtained by the distillation of crude oil, and the present invention.
- According to the present invention there is provided a kerosene composition containing at least 99 wt % of n-paraffins which have from 7 to 18 carbon atoms and/or iso-paraffins which have from 7 to 18 carbon atoms along with cyclo-paraffins, and alkyl derivatives thereof, which have from 9 to 18 carbon atoms. Preferably, at least 99 wt % of said n-paraffins and/or iso-paraffins have from 7 to 12 carbon atoms. Preferably, at least 99 wt % of said cyclo-paraffins have from 9 to 12 carbon atoms.
- In said kerosene composition according to the present invention the ratio by weight of the n-paraffins and/or iso-paraffins to the cyclo-paraffins and/or alkyl derivatives thereof is preferably from 92:8 to 25:75, more preferably from 85:15 to 55:45.
- Said kerosene composition according to the present invention preferably has a smoke point of at least 30 mm.
- The n-paraffins and iso-paraffins which have from 7 to 18 carbon atoms which are used in the present invention can be obtained by taking synthetic gas obtained by partial oxidation, steam reforming from coal, natural gas, for example, and producing long-chain alkyl hydrocarbon polymer oil by means of a Fischer-Tropsch reaction and then carrying out hydrocracking and distillation. Furthermore, they can also be obtained in view of production costs by cracking or synthesis, for example, from the various fractions which are obtained in petroleum refining.
- If the n-paraffins or iso-paraffins have less than 7 carbon atoms then the boiling point and flash point are too low and this is undesirable, and if the number of carbon atoms exceeds 18 then there are problems with low temperature fluidity, the boiling point is also raised too far and there is an adverse effect on the combustibility, which is undesirable.
- Examples of the n-paraffins and iso-paraffins which can be used in the present invention include n-heptane, iso-heptane, n-octane, iso-octane, n-nonane, iso-nonane, n-decane, iso-decane, n-undecane, iso-undecane, n-dodecane, iso-dodecane, 2-methylheptane, 2,2-dimethylhexane, 2-methyloctane, 2,2-dimethylheptane, 2-methylnonane, 2,2-dimethyloctane, 2-methyldecane, 2,2-dimethylnonane, and mixtures thereof.
- The cyclo-paraffins, and the alkyl derivatives thereof, which have from 9 to 18 carbon atoms and which can be used in the present invention can be obtained by the hydrogenation of the light oil and intermediate oil fractions obtained by the distillation of coal tar, or by separation by distillation from crude oil and hydrogenation of the various distillate fractions.
- If the number of carbon atoms of the cyclo-paraffins or alkyl derivatives thereof is less than 9 then the flash point is too low and this is undesirable, and if the number of carbon atoms exceeds 18 then the boiling point is too high and there is an adverse effect on the combustibility, and this is undesirable.
- Examples of the cyclo-paraffins and alkyl derivatives thereof which can be used in the present invention include n-butyl-cyclopentane, n-pentyl-cyclopentane, n-hexyl-cyclopentane, isopropyl-cyclohexane, n-butyl-cyclohexane, n-pentyl-cyclohexane, n-hexyl-cyclohexane, cis-decahydronaphthalene, trans-decahydronaphthalene, 1-methyl-trans-decahydronaphthalene), 9-ethyl-(cis-decahydronaphthalene) and mixtures thereof.
- The kerosenes of the present invention must contain at least 99 wt % of the aforementioned n-paraffins and/or iso-paraffins along with the cyclo-paraffins and alkyl derivatives thereof. If the content is less than 99 wt %, then aromatic components, olefinic components, oxygen-containing components, nitrogen-containing components and sulfur-containing components are admixed and a smell is observed when handling, igniting and extinguishing the kerosene, and the storage stability is of the same order as that of a general kerosene.
- Furthermore, as indicated above, the mixing ratio by weight of the n-paraffins and/or iso-paraffins to the cyclo-paraffins and alkyl derivatives thereof is preferably from 92:8 to 25:75, and most preferably from 85:15 to 55:45. If the cyclo-paraffins and alkyl derivatives content thereof is high then the smoke point which indicates the combustibility is less than 30 mm and so this is undesirable, and if it is low then the flash point falls below the JIS specification and actual fuel consumptions (L/h) become greater than the indicated fuel consumptions by volume for the stoves and exceed the +10% of the JIS specification and so this is undesirable.
- Preferably, said n-paraffins and/or iso-paraffins have been obtained by means of Fischer-Tropsch synthesis.
- The kerosene compositions of the present invention comprising the compositions indicated above have the properties (1) to (4) indicated below, and in particular they have a high smoke point and excellent combustibility. As the smoke point is raised and the combustibility is improved, the time from ignition to complete combustion is shortened and complete combustion is promoted in the steady combustion state. Consequently there is no unpleasant smell or soot on ignition and the exhaust gas on ignition and during steady state combustion is also clean.
- (1) Distillation IBP (Initial Boiling Point) is above 150° C., and preferably above 155° C., and the 95% distillation temperature is less than 270° C.
- (2) Flash point is at least 40° C.
- (3) Sulfur content is not more than 10 ppbm.
- (4) Smoke point is at least 30 mm (compositions with smoke points of at least 35 mm, and even of 40 mm can also be obtained.)
- The present invention will be illustrated by the following illustrative examples, which is provided for illustration only and is not to be construed as limiting the claimed invention in any way.
- An n-paraffin/iso-paraffin mixed oil of the composition shown in Table 1 was obtained by production with the SMDS (Shell Middle Distillate Synthesis) process, in which natural gas is partially oxidised, heavy paraffins are synthesised by means of Fischer-Tropsch synthesis, and naphtha, kerosene and light oil fractions are obtained by hydrocracking of the heavy paraffin oil obtained, and distillation.
TABLE 1 Chemical Concentration Concentration Name Wt % Chemical Name wt % n-Heptane 0.01 n-Dodecane 0.73 iso-Heptane 0.07 iso-Dodecane 0.73 n-Octane 0.50 n-Tridecane 0.05 iso-Octane 5.66 iso-Tridecane 0.05 n-Nonane 26.95 n-Tetradecane 0.04 iso-Nonane 16.13 iso-Tetradecane 0.01 n-Decane 20.96 n-Pentadecane 0.02 iso-Decane 15.48 iso-Pentadecane 0.01 n-Undecane 3.83 n-Hexadecane 0.02 iso-Undecane 8.74 n-Heptadecane 0.01 - Next, 92 parts by weight of the mixed oil and 8 parts by weight of decalin (decahydronaphthalene) were mixed together and an n-paraffin/iso-paraffin/decalin mixed kerosene was obtained.
- Moreover, the concentrations of the iso-paraffins in
- Table 1 indicate the concentrations of all of the branched hydrocarbons which have the same carbon number since it is difficult to determine the isomers with different structures. For example, iso-octane includes all isomers such as 2-methylheptane, 2,2-dimethylhexane and the like.
- Seventy parts by weight of the n-paraffin/iso-paraffin mixed oil obtained in Example 1 and 30 parts by weight of decalin were mixed and an n-paraffin/iso-paraffin/decalin mixed kerosene was obtained.
- Twenty five parts by weight of the n-paraffin/iso-paraffin mixed oil obtained in Example 1 and 75 parts by weight of decalin were mixed and an n-paraffin/iso-paraffin/decalin mixed kerosene was obtained.
- The properties of the kerosene mixtures of Examples 1 to 3 obtained in the way outlined above, kerosene of the composition shown in Table 1 produced by the SMDS process (Comparative Example 1) and JIS No. 1 kerosene which is generally sold (Comparative Example 2) are shown in Table 2.
TABLE 2 Property Test Method Example 1 Example 2 Example 3 Comp. Ex. 1 Comp. Ex. 2 Specific Gravity JIS K 2249 0.761 0.794 0.882 0.735 0.800 15/4° C. Ignition Point ° C. JIS K 2265 42 45 51 41 49 Sulphur Content (ppm) JIS K 2545 >1 >1 >1 >1 42 Smoke Point (mm) JIS K 2537 48 44 30 >50 24 Pour Point (° C.) JIS K 2269 >−30 >−30 >−30 >−30 >−30 Distillation ° C. Start JIS K 2254 156.5 161.0 171.0 154.5 153.5 Point 95% JIS K 2254 199.0 197.0 192.5 199.5 265.0 - As is clear from Table 2, the properties of the kerosene compositions of the present invention showed a smoke point much higher than that of Comparative Example 2, superior burning properties and a smaller sulphur fraction. Furthermore, they had a higher ignition point (flash point) than that of Comparative Example 1, and the JIS specification was satisfied.
- The tests indicated below were carried out using the kerosenes of Examples 1 to 3 and Comparative Examples 1 and 2.
- Stove Burning Test
- Combustion performance tests were carried out using a wick top to bottom type stove and a petroleum fan heater. The fuel consumption for maximum burning and the CO/CO2 ratio of the exhaust gas were measured in accordance with the test methods laid down in JIS S 2019 and JIS S 2031 in the case of the wick top to bottom type stove and in accordance with JIS S 2036 and JIS S 3031 in the case of the petroleum fan heater.
- The results obtained are shown in Table 3.
TABLE 3 Burning Performance Test Item Example 1 Example 2 Example 3 Comp. Ex. 1 Comp. Ex. 2 Wick Fuel Measured L/h 0.294 0.278 0.246 0.299 0.251 Top to Consumption Bottom Difference Between +10.0 +4.2 −7.8 +12.0 −6.0 Type Indicated and Measured (%) Stove CO/CO2 in Exhaust Gas 0.00004 0.00004 0.00006 0.00005 0.00037 SO2 Content in Exhaust Gas ppm <0.01 <0.01 <0.01 <0.01 0.60 Fan Fuel Measured L/h 0.367 0.352 0.315 0.374 0.348 Heater Consumption Difference Between +9.8 +3.6 −7.4 +12.0 +4.2 Indicated and Measured (%) CO/CO2 in Exhaust Gas 0.00030 0.00028 0.000028 0.00029 0.00032 SO2 Content in Exhaust Gas ppm <0.01 <0.01 <0.01 <0.01 0.50 - As is clear from Table 3, the kerosene compositions of the present invention had a lower CO/CO2 and a much lower SO2 content in the exhaust gas when compared with the kerosene of Comparative Example 2, and they provided a cleaner exhaust gas. Furthermore, the kerosene of Comparative Example 1 was such that the difference between the indicated and measured fuel consumption (L/h) per stove capacity did not satisfy the JIS specification of within ±10%, while the kerosene compositions of the present invention did satisfy this JIS specification.
- Odour Function Test
- Twenty function tests were carried out using a wick top to bottom type stove and a petroleum fan heater, when ignited and when extinguished. The results are shown in Table 4.
TABLE 4 Example 1 Example 2 Example 3 Comp. Ex. 1 Comp. Ex. 2 Odour of the Kerosene Less than Comp. Ex. 2 20 20 20 20 — Itself No Change 0 0 0 0 — Worse 0 0 0 0 — Wick Top When Lit Less than Comp. Ex. 2 20 20 20 20 — to Bottom No Change 0 0 0 0 — Stove Worse 0 0 0 0 — When Less than Comp. Ex. 2 18 18 16 18 — Extinguished No Change 2 2 4 2 — Worse 0 0 0 0 — Fan Heater When Lit Less than Comp. Ex. 2 20 20 20 20 — No Change 0 0 0 0 — Worse 0 0 0 0 — When Less than Comp. Ex. 2 19 19 17 19 — Extinguished No Change 1 1 3 1 — Worse 0 0 0 0 — - -As is clear from Table 4, the kerosene compositions of the present invention were such that the kerosenes themselves had less odour than the kerosene of Comparative Example 2, and they also had less odour when they were lit and when they were extinguished.
- Oxidation Stability Test
- The Saybolt color and the amount of peroxide were determined as measures of the deterioration which had occurred after a fixed period of time with carbon-arc irradiation at 40° C. in a weathermeter (manufactured by the Suga Testing Machine Co.) as the test apparatus. The results are shown in FIGS. 1 and 2.
- It is clear from FIGS. 1 and 2 that the kerosene composition of the present invention was much less liable to deteriorate than the kerosene of Comparative Example 2 and had excellent storage stability.
- By means of the present invention it is possible to provide a kerosene composition for which the cost, fuel consumption and ignition point are the same as those of a general kerosene, with which the odour of the kerosene itself is very slight so that there is no unpleasant oily smell when it is being handled, which has good burning properties and provides a cleanexhaust gas when it is burned, and which has excellent storage properties, which has not been obtained with conventional methods.
Claims (16)
1. A kerosene composition comprising at least 99 wt % of a) at least one n-paraffins and/or iso-paraffins, said n-paraffins and/or iso-paraffins having from 7 to 18 carbon atoms and b) at least one cyclo-paraffins and/or alkyl derivatives thereof having from 9 to 18 carbon atoms.
2. The kerosene composition of claim 1 wherein at least 99 wt % of said n-paraffins and/or iso-paraffins have from 7 to 12 carbon atoms.
3. The kerosene composition of claim 1 wherein at least 99 wt % of said cyclo-paraffins have from 9 to 12 carbon atoms.
4. The kerosene composition of claim 1 wherein the ratio by weight of the n-paraffins and/or iso-paraffins to the cyclo-paraffins and/or alkyl derivatives thereof is from 92:8 to 25:75.
5. The kerosene composition of claim 4 wherein said ratio is from 85:15 to 55:45.
6. The kerosene composition of claim 1 having a smoke point of at least 30 mm.
7. The kerosene composition of claim 1 wherein the component a) is selected from the group consisting of n-heptane, iso-heptane, n-octane, iso-octane, n-nonane, iso-nonane, n-decane, iso-decane, n-undecane, iso-undecane, n-dodecane, iso-dodecane, 2-methylheptane, 2,2-dimethylhexane, 2-methyloctane, 2,2-dimethylheptane, 2-methylnonane, 2,2-dimethyloctane, 2-methyldecane, 2,2-dimethylnonane, and mixtures thereof.
8. The kerosene composition of claim 1 wherein component b) is selected from the group consisting of n-butyl-cyclopentane, n-pentyl-cyclopentane, n-hexyl-cyclopentane, isopropyl-cyclohexane, n-butyl-cyclohexane, n-pentyl-cyclohexane, n-hexyl-cyclohexane, cis-decahydronaphthalene, trans-decahydronaphthalene, 1-methyl-(trans-decahydronaphthalene), 9-ethyl-(cis-decahydronaphthalene), and mixtures thereof.
9. The kerosene composition of claim 8 wherein the component b) is selected from cis- and trans-decahydronaphthalene and mixtures thereof.
10. The kerosene composition of claim 1 wherein the n-paraffins and iso-paraffins have been obtained by means of Fischer-Tropsch synthesis.
11. The kerosene composition of claim 4 wherein the n-paraffins and iso-paraffins have been obtained by means of Fischer-Tropsch synthesis.
12. The kerosene composition of claim 6 wherein the n-paraffins and iso-paraffins have been obtained by means of Fischer-Tropsch synthesis.
13. The kerosene composition of claim 4 having a smoke point of at least 30 mm.
14. The kerosene composition of claim 5 having a smoke point of at least 30 mm.
13. The kerosene composition of claim 7 having a smoke point of at least 30 mm.
14. The kerosene composition of claim 8 having a smoke point of at least 30 mm.
Applications Claiming Priority (2)
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JP2002351205A JP4150579B2 (en) | 2002-12-03 | 2002-12-03 | Kerosene composition |
JP351205/02 | 2002-12-03 |
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US10/726,376 Abandoned US20040149627A1 (en) | 2002-12-03 | 2003-12-03 | Kerosene composition |
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US (1) | US20040149627A1 (en) |
EP (1) | EP1567620A1 (en) |
JP (1) | JP4150579B2 (en) |
KR (1) | KR20050085185A (en) |
CN (1) | CN100526439C (en) |
AU (1) | AU2003298342A1 (en) |
CA (1) | CA2508289A1 (en) |
NO (1) | NO20053248D0 (en) |
WO (1) | WO2004050804A1 (en) |
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- 2003-12-03 EP EP03796080A patent/EP1567620A1/en not_active Withdrawn
- 2003-12-03 AU AU2003298342A patent/AU2003298342A1/en not_active Abandoned
- 2003-12-03 US US10/726,376 patent/US20040149627A1/en not_active Abandoned
- 2003-12-03 CA CA002508289A patent/CA2508289A1/en not_active Abandoned
- 2003-12-03 KR KR1020057009608A patent/KR20050085185A/en not_active Application Discontinuation
- 2003-12-03 WO PCT/EP2003/050935 patent/WO2004050804A1/en active Application Filing
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Also Published As
Publication number | Publication date |
---|---|
CN1723267A (en) | 2006-01-18 |
EP1567620A1 (en) | 2005-08-31 |
KR20050085185A (en) | 2005-08-29 |
NO20053248L (en) | 2005-07-01 |
WO2004050804A1 (en) | 2004-06-17 |
AU2003298342A1 (en) | 2004-06-23 |
NO20053248D0 (en) | 2005-07-01 |
CN100526439C (en) | 2009-08-12 |
JP2004182854A (en) | 2004-07-02 |
JP4150579B2 (en) | 2008-09-17 |
CA2508289A1 (en) | 2004-06-17 |
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