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1. 发明专利

JPH08269458A PREPARATION OF COAL SLURRY 失效
公开(公告)号：JPH08269458A
公开(公告)日：1996-10-15
申请号：JP7517095
申请日：1995-03-31
申请人： AGENCY IND SCIENCE TECHN , MITSUI SEKITAN EKIKA KK , NIPPON STEEL CORP
发明人： SAKAKI TAKESHI , SHIBATA MASAO , HIROSUE HIDEHARU , SAKAWAKI KOJI , NOGAMI YOSHINOBU , IGUCHI KENJI , KAWABATA MUTSUMARO , ENDO KOHEI
IPC分类号： C10G1/00 , C10G1/06
摘要： PURPOSE: To obtain a coal slurry for coal liquefaction which enables stable and efficient transport and efficient coal liquefaction without decreasing the coal concn. by decreasing the viscosity. CONSTITUTION: A coal slurry is prepd. by pulverizing coal to give a powder contg. 90wt.% or higher 100 mesh undersize, reducing the water content of the powder to 85% or lower of the equilibrium moisture of coal, and mixing the powder with a coal liquefaction solvent and a coal liquefaction catalyst.

2. 发明专利

JPH11323349A COAL LIQUEFACTION 失效
公开(公告)号：JPH11323349A
公开(公告)日：1999-11-26
申请号：JP14828898
申请日：1998-05-14
申请人： MITSUI SEKITAN EKIKA KK , NIPPON STEEL CORP
发明人： OKADA YASUO , IGUCHI KENJI , NOGAMI YOSHINOBU , IMADA KUNIHIRO , MOCHIZUKI MICHIHARU
IPC分类号： C10G1/00 , C10G1/06 , C10G1/08
摘要： PROBLEM TO BE SOLVED: To provide, for a coal liquefaction process having continuous multi- stage liquefaction reactors, an effective coal liquefaction method whose operation condition is controlled, according to the progress of the reaction in liquefaction reactors, by the property of a solid org. material in samples of the contents taken out of the reactors. SOLUTION: In a coal liquefaction method where a coal is mixed with a solvent for liquefaction and a catalyst to form a slurry, and a liquefied oil is manufactured by hydrocracking the slurry under a high pressure and high temp. condition while supplying a gas mainly composed of hydrogen, its operation condition is controlled, according to the progress of the reaction in liquefaction reactors, by sampling the contents of each reactor of the liquefaction process comprising continuous multi-stage liquefaction reactors and evaluating the property of a solid org. material.

3. 发明专利

JPH10298557A LIQUEFACTION OF COAL 失效
公开(公告)号：JPH10298557A
公开(公告)日：1998-11-10
申请号：JP10924197
申请日：1997-04-25
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： AIHARA YOICHI , IMADA KUNIHIRO , MOCHIZUKI MICHIHARU , IGUCHI KENJI , NOGAMI YOSHINOBU
IPC分类号： C10G1/06
摘要： PROBLEM TO BE SOLVED: To produce a liquefied coal wherein a solvent for liquefaction of coal to be recycled is surely judged in terms of stabilization of the solvent by determining the time when each of the concentrations of specific substances contained in the solvent result in a certain convergence and hence a recovery of stabilized liquefied oil is increased and a running time required for the stabilization is lessened. SOLUTION: This method comprises the following steps: preparing a coal slurry 4 by blending coal 1 and a solvent and catalyst for liquefying coal; producing a liquefied oil by heating and pressurizing the coal slurry 4 in the presence of hydrogen 5 so as to be subjected to pyrolysis and hydrocracking reaction; fractionating the liquefied oil into a product oil, circulating solvent 14 and liquefied residuals 13 by distillation under normal and reduced pressures; hydrogenating the circulating solvent 14 by heating and pressurizing the solvent 14 in the presence of hydrogen 15 and a catalyst for solvent hydrogenation; and recyclably employing the resultant solvent in the first slurry-preparing process. In the above liquefied process, when the variation of the respective concentrations of paraffin, pyrene, biphenyl, dibenzofuran and/or anthracene falls within the range of 2% per day, the solvent in question is judged as a stabilized solvent.

4. 发明专利

JPH10298559A MEASUREMENT OF RESIDENCE TIME OF COAL SLURRY IN LIQUEFACTION TOWER AND LIQUEFACTION OF COAL THEREBY 失效
公开(公告)号：JPH10298559A
公开(公告)日：1998-11-10
申请号：JP10924097
申请日：1997-04-25
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： IKEDA KOICHI , IMADA KUNIHIRO , IGUCHI KENJI , NOGAMI YOSHINOBU , TAKEDA TETSUYA
IPC分类号： C10G1/06 , C10G1/08
摘要： PROBLEM TO BE SOLVED: To provide a method for easily measuring the residence time of coal slurry in a liquefying reaction tower under such a severe condition as high temperatures and pressures without the need of using any hard-to-estimate value, by determining the residence time grounded on a pressure difference within the tower and flow rate of the slurry at the outlet of the tower. SOLUTION: This method for measuring the residence time of coal slurry in a reaction tower for coal liquefaction, which is closely involved in the liquefying characteristics, is directed to such a coal liquefaction process that a coal, liquefying solvent and catalyst are blended for the coal slurry and a liquefying gas is fed into the resultant slurry for hydrocracking in the tower for the coal liquefaction under high temperatures and pressures, and the measurement is conducted by determining a pressure difference within the tower and flow rate of the slurry at the outlet of the tower. The pressure difference measurement is carried out e.g. by using a unit 3 composed of a couple of pressure sensing nozzles 4, 4 inserted into two vertically different positions in the tower 1 and a pressure difference sensing device 5 connected with the couple of nozzles 4, 4 to measure the pressure difference between the couple of nozzles 4, 4 a vertical length H apart from each other. The flow rate of the coal slurry is pref. estimated by sampling the slurry from inside the tower 1 to determine the amount and composition of the sample.

5. 发明专利

JPH08302357A METHOD OF LIQUEFYING COAL 失效
公开(公告)号：JPH08302357A
公开(公告)日：1996-11-19
申请号：JP11603895
申请日：1995-05-15
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： KAWABATA MUTSUMARO , NAMIKI YASUKI , ENDO KOHEI , HANADA YOSHIAKI , SAKAWAKI KOJI , NOGAMI YOSHINOBU , IGUCHI KENJI
IPC分类号： C10G1/06
摘要： PURPOSE: To provide a method of liquefying coal to produce products improved in qualities by subjecting a slurry containing coal, a solvent and a catalyst to a liquefaction reaction to obtain specified mixtures A, B and C, hydroforming mixture C, distilling the hydroformate, recovering a light oil and a middle oil, and recirculating a heavy oil. CONSTITUTION: A solvent 1, a catalyst 2, and coal 3 are mixed with each other in a slurrying tank 4 and the formed slurry is sent together with a reducing gas 5 such as hydrogen to a liquefier 6 to effect a liquefaction reaction under high-temperature and high-pressure conditions. The product is separated into a light oil 12, a middle oil 13, and a heavy oil 14 in gas/liquid separators 7-11, and the obtained liquid is separated into a heavy oil 16 and residues 17 in a vacuum distillation tower. A mixture of the light oil 12, the middle oil 13, and the heavy oil 16 are fed together with a reducing gas into a solvent hydrogenation towers 18 and 19 and reformed to obtain a mixture of a reformed light oil 12' with a reformed middle oil 13' and a reformed heavy oil 16'. The mixed modified oil is separated in atmospheric distillation towers 20, 21 and 22 to recover product light oils 23 and 24 and a product middle oil 25, and the reformed heavy oil 26 is hydrogenated to obtain a hydrogenation product recirculated as a solvent for coal slurrying.

6. 发明专利

JPH10259383A COAL LIQUEFACTION PROCESS 失效
公开(公告)号：JPH10259383A
公开(公告)日：1998-09-29
申请号：JP6837997
申请日：1997-03-21
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： MOCHIZUKI MICHIHARU , IMADA KUNIHIRO , KAWABATA MUTSUMARO , IGUCHI KENJI , NOGAMI YOSHINOBU , SAKAWAKI KOJI , OKADA YASUO
IPC分类号： C10G1/06 , C10G1/08
摘要： PROBLEM TO BE SOLVED: To achieve a high liquefaction yield in the coal liquefaction reaction in a coal liquefaction process by optimally adjusting the average liq.-phase dwell times in liquefaction reaction towers and to achieve a high liquefaction yield while reducing the running cost by optimally adjusting the liquefaction reaction temp. and the amt. of a catalyst added under an average liq.-phase dwell time maintained optimally for each kind of coal. SOLUTION: In a coal liquefaction process wherein an oil obtd. by heating a slurry comprising coal. a coal liquefaction solvent, and a coal liquefaction catalyst under pressure in the presence of hydrogen, distilling the resultant oil, and hydrogenating a part of the product oil to recirculate, a high liquefaction yield is achieved at a low cost by measuring average liq.-phase dwell times in liquefaction reaction towers by a neutron decay method, by adjusting the gas/slurry ratio and the liquefaction temp. so that optimal average liq.-phase dwell times in each liquefaction tower and in all the liquefaction towers are obtd., and by adjusting the liquefaction reaction pressure, the amt. of catalyst added, and the coal slurry concn. each to an optimal value.

7. 发明专利

JPH09296181A LIQUEFACTION OF COAL 失效
公开(公告)号：JPH09296181A
公开(公告)日：1997-11-18
申请号：JP11252696
申请日：1996-05-07
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： KAWABATA MUTSUMARO , OKADA SEIICHI , AIHARA YOICHI , IMADA KUNIHIRO , IGUCHI KENJI , NOGAMI YOSHINOBU
IPC分类号： C10G1/06
摘要： PROBLEM TO BE SOLVED: To liquefy coal from a high-concentration slurry into a fuel oil at a low cost by carrying out the liquefying reaction of a specific coal slurry together with a reducing gas at a high temperature under a high pressure, distilling and separating the resultant liquefied oil into a product oil consisting essentially of a light, a medium and a heavy oils. SOLUTION: Coal A1 is mixed with a solvent B2 and a catalyst C3 with a stirring device 5, etc., in a slurry preparation tank 4, etc., so as to contain 1-3wt.% catalyst C based on the dried coal A and provide >=50wt.% coal A based on the total amount of the coal A and solvent B and

8. 发明专利

JPH09296179A LIQUEFACTION OF COAL 失效
公开(公告)号：JPH09296179A
公开(公告)日：1997-11-18
申请号：JP10831996
申请日：1996-04-30
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： AIHARA YOICHI , IMADA KUNIHIRO , ITONAGA MASUMI , IGUCHI KENJI , NOGAMI YOSHINOBU
IPC分类号： B01J23/847 , B01J23/88 , C10G1/06
摘要： PROBLEM TO BE SOLVED: To stably liquefy coal at a high efficiency by mixing the coal with a solvent and a catalyst, carrying out the hydrogenolysis of the resultant slurry, providing a liquefied oil, distilling the prepared liquefied oil, controlling the feed rates of a medium oil and a heavy oil obtained by the distillation, hydrogenating the oils, affording a solvent with a constant aromatic hydrocarbon fraction and circulating the solvent for use. SOLUTION: Coal 1 is mixed with a catalyst 2 for liquefying the coal 1 and a solvent 3 for liquefying the coal 1 to provide a slurry 4, which is then heated and pressurized in the presence of hydrogen 5 to carry out the pyrolysis and hydrogenolysis reactions. Thereby, a liquefied oil is obtained, distilled under atmospheric and reduced pressures and separated into a product oil and a liquefaction residue. The feed rates of a part or all of the resultant medium oil 11 and a heavy oil 12 are controlled with a feed pump 14, etc., so as to keep the aromatic hydrocarbon fraction (fa ) of the produced solvent 3 for liquefying the coal 1 constant and hydrogenolysis is conducted by using a catalyst for hydrogenating the solvent 3 to produce the solvent 3 for liquefying the coal 1 at a constant fa . The resultant solvent 3 for liquefying the coal 1 is circulated for use in slurrying of the coal 1.

9. 发明专利

JPH06287571A PREPARATION OF COAL SLURRY IN COAL LIQUEFACTION PROCESS 失效
公开(公告)号：JPH06287571A
公开(公告)日：1994-10-11
申请号：JP7979093
申请日：1993-04-06
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： MOCHIZUKI MICHIHARU , KAWABATA MUTSUMARO , IGUCHI KENJI , NOGAMI YOSHINOBU
IPC分类号： C10G1/06 , C10G1/08 , C10L1/32 , C10L10/18
摘要： PURPOSE:To provide a coal slurry preparation process whereby the feed trouble arising from an increase in the slurry viscosity in a coal slurry preparation step can be prevented. CONSTITUTION:This process for preparing a coal slurry by mixing feed coal with a solvent for coal liquefaction, a catalyst for coal liquefaction and a surfactant comprises setting the temperature in the slurry preparation at 50-150 deg.C, adjusting the time of the slurry preparation, adjusting the sheer rate of the slurry so that the relationship between the sheer rate of the slurry and the shear stress of the slurry may lie within the second region of Neutonian flow, and thereby adjusting the viscosity of the slurry to a necessary value. According to the process, a slurry feed trouble in the slurry preparation can be prevented even when coal highly swellable in the solvent and apt to form a highly viscous slurry is used, and the operation cost can be reduced.

10. 发明专利

JPH0665581A METHOD FOR ADJUSTING COAL SLURRY IN COAL LIQUEFACTION PROCESS 失效
公开(公告)号：JPH0665581A
公开(公告)日：1994-03-08
申请号：JP24144592
申请日：1992-08-19
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： MOCHIZUKI MICHIHARU , KATO KENJI , KAWABATA MUTSUMARO , YAMAMOTO HISANORI , IGUCHI KENJI , NOGAMI YOSHINOBU
IPC分类号： C10G1/00 , C10G1/06
摘要： PURPOSE:To prevent the occurrence of feed troubles due to increase in slurry viscosity in preparing a coal slurry in the coal liquefaction process by controlling the temp. of the slurry in preparation, time of recirculation for stirring and mixing, and shear rate corresponding to the type of coal. CONSTITUTION:A coal slurry is prepd. by mixing and stirring coal, a coal liquefaction solvent, and a coal liquefaction catalyst by recirculating them through a slurry recirculation line 23. The final viscosity of the slurry is adjusted by specifying the temp. of the slurry in preparation to be in the range of 50-150 deg.C, recirculating the slurry at the specified temp., and simultaneously adjusting the time of recirculation. Furthermore, the relation between the shear rate and shear stress of slurry, which is determined by the flow rate of slurry and the radius of piping, is kept in the range of Newtonian flow by controlling the flow rate of slurry in the recirculation line 23 with slurry recirculation pumps 21 and 22 and by controlling the speed of stirring in a slurry preparation vessel 19.

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