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1. 发明专利

JPH10298558A LIQUEFACTION OF COAL 失效
公开(公告)号：JPH10298558A
公开(公告)日：1998-11-10
申请号：JP10924297
申请日：1997-04-25
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： KAWABATA MUTSUMARO , IMADA KUNIHIRO , IGUCHI KENJI , NOGAMI YOSHINOBU
IPC分类号： C10G1/00 , C10G1/06
摘要： PROBLEM TO BE SOLVED: To produce a liquefied coal without reducing the efficiency of the liquefying reaction by sufficiently supplying an hydrogen gas to the coal slurry, even if highly concentrated, by using a slurry preparation solvent having a higher capacity as a hydrogen donor or by increasing the ratio of the hydrogen gas to coal slurry for the purpose of hydrogen compensation. SOLUTION: This method comprises the following process: reacting such a coal slurry, a mixture of coal, solvent, and catalyst as to contain >=40 wt.% of the coal and 1 to 3 wt.% of the catalyst based on the dried coal with a hydrogen gas at high temperatures and high pressures; recovering the resultant liquefied oil as three product oils consisting essentially of light oil, medium oil and heavy oil by fractional distillation under normal or reduced pressures: thus liquefying the coal. In the above process, at least one of the next 4 operative factors is selected: setting a hydrogen concentration in the supply gas at 85 to 100 vol.%; setting the ratio of the hydrogen gas to slurry at 170 to 1,500 Nl/kg; setting a reaction pressure at 170 to 250 kg/cm G; and using a solvent with an aromatic carbon index fa of 0.4 to 0.6 and/or with a hydrogen donor index PDQI of 10 to 20 mg/l.

2. 发明专利

JPH10130655A METHOD FOR KNOWING VISCOSITY OF LIQUEFACTION RESIDUE IN COAL LIQUEFACTION PROCESS AND METHOD FOR DISCHARGING THE RESIDUE 失效
公开(公告)号：JPH10130655A
公开(公告)日：1998-05-19
申请号：JP28716396
申请日：1996-10-29
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： ITONAGA MASUMI , KAWABATA MUTSUMARO , IMADA KUNIHIRO , OKADA YASUO , IGUCHI KENJI , NOGAMI YOSHINOBU
IPC分类号： C10G1/06
摘要： PROBLEM TO BE SOLVED: To control the state of discharging a liquefaction residue by estimating the viscosity of the residue from the coal compsn., the ratio of catalyst added, and the liquefaction conditions. SOLUTION: This coal liquefaction process comprises the step of preparing a slurry wherein a recirculating solvent, coal, and a coal liquefaction catalyst are mixed; the step of hydrocracking the slurry under heating and pressure to form a coal liquefaction oil; the step of distilling the oil to divide it into a product oil and a liquefaction residue; and the step of mixing the middle fraction oil of the product oil with its heavy oil and hydrogenating the resultant mixture in the presence of solvent hydrogenation catalyst to from the recirculating solvent. In discharging the liquefaction residue separated in a vacuum distillation tower at the distillation step of the above process, the viscosity of the residue is estimated from the volatile content, fixed carbon, and ash content of raw coal, the ratio of a catalyst added, and the liquefaction conditions in a liquefaction tower, such as reaction temp. and pressure, gas-liq. ratio, and concn. of water-base system, and thereby the distillation tower is controlled to keep the viscosity constant. Thus, the residue can be discharged stably even when the ash concn. and the properties of the org. components change.

3. 发明专利

JPH0718277A COMPOSITION CONTAINING COAL LIQUEFACTION RESIDUE 失效
公开(公告)号：JPH0718277A
公开(公告)日：1995-01-20
申请号：JP16572593
申请日：1993-07-05
申请人： NIPPON STEEL CORP
发明人： IKEDA KOICHI , KAWABATA MUTSUMARO , SHIKASUMI NOBORU
IPC分类号： C10G1/06 , C10L1/32 , C10L10/18
摘要： PURPOSE:To provide the compsn. which enables effective utilization of a residue which is produced as a by-product in the process of coal liquefaction wherein a slurry, i.e., a mixture of coking coal with a coal liquefaction solvetnt, is hydrocracked at a high temp. and pressure in the presence of a catalyst to produce a fuel oil. CONSTITUTION:The compsn. in the form of a slurry is prepd. by mixing water with a fine powdered residue which is solid at normal temp. and produced as a by-product in the step of separating and recovering a coal liq. in the process of coal liquefaction. Thus, the residue becomes handleable as a fluid, greatly facilitating its transport and handling, enhancing the utility value as a fuel, and improving the economics of the whole coal liquefaction process.

4. 发明专利

JPH05311178A 失效
公开(公告)号：JPH05311178A
公开(公告)日：1993-11-22
申请号：JP14685592
申请日：1992-05-13
申请人： NIPPON STEEL CORP
发明人： KAWABATA MUTSUMARO , KATO KENJI , TERASHITA YASUSHI
IPC分类号： C10G1/06 , C10K3/02 , C10L3/00
摘要： PURPOSE:To reutilize the gas as a fuel gas and a reducing gas by subjecting a coal slurry to a liquefying reaction with the reducing gas under a high temperature, high pressure condition, reacting the generated CO2-containing gas in a reaction tower charged with a heavy metal catalyst under a specific condition and subsequently taking out the generated low CO2 gas 1 CONSTITUTION:In the coal liquefaction method comprising subjecting a coal slurry 2 to a liquefying reaction 3 with a reducing gas (hydrogen gas) under a high temperature, high pressure condition to produce a liquid oil 4, taking out the CO2-containing gas 5 generated under the high temperature and high pressure and subsequently reutilizing the gas 5, the CO2-containing gas 5 is supplied to a reaction tower 6 charged with a heavy metal catalyst such as chromium oxide and reacted under conditions comprising a temperature of 300-400 deg.C and a pressure of 100-200kg/cm . The generated low CO2 concentration gas 7 is taken out and reutilized as a fuel gas and as the reducing gas in the coal-liquidization process, thereby permitting to reduce the content of CO2 in the generated gas, contribute to a countermeasure for preventing the earth- warming phenomenon and efficiently liquefy the coal.

5. 发明专利

JPH08302356A METHOD OF LIQUEFYING COAL 失效
公开(公告)号：JPH08302356A
公开(公告)日：1996-11-19
申请号：JP11198195
申请日：1995-05-10
申请人： NIPPON STEEL CORP
发明人： AIHARA YOICHI , KAWABATA MUTSUMARO , IKEDA KOICHI
IPC分类号： C10G1/06 , C10G1/08
摘要： PURPOSE: To provide a method of liquefying coal whereby the amount of heteroatom compounds produced can be reduced by determining the relationship between the N and S contents of a middle oil and those of a solvent and using an aromatic compound having a specified ring structure as the solvent which reduces the N and S contents of the middle oil to at least the target values. CONSTITUTION: A liquefied coal heavy oil having a boiling point of 350-538 deg.C is hydrogenated to prepare a bi- to tetra-cyclic aromatic compound having specified N and S contents determined from the relationship between the N and S contents of a middle oil and a solvent under the same operating conditions, and this compound is used as the solvent. A coal powder prepared so as to have a grain size of about 100 mesh or below and a water content of about 1.5wt.% is mixed with a synthetic iron sulfide catalyst and the prepared solvent to prepare a slurry. A reducing gas such as H2 is blown into the slurry, and the mixture is subjected to a liquefaction reaction under applied pressure and heat. The formed liquefied coal oil is distilled to obtain a light oil having a boiling range from ordinary temperature to 220 deg.C, a heavy oil of a boiling range from 350 to 538 deg.C, distillation residues, and a middle oil having N and S contents of at least the target values (N: 1.0% or below, and S: about 0.05% or below).

6. 发明专利

JPH08283742A PRODUCTION OF COAL SLURRY IN COAL LIQUEFACTION PROCESS 失效
公开(公告)号：JPH08283742A
公开(公告)日：1996-10-29
申请号：JP8732095
申请日：1995-04-13
申请人： NIPPON STEEL CORP
发明人： KAWABATA MUTSUMARO , NAKAGAWA ASAYUKI , SAKAWA MITSUHIRO
IPC分类号： C10G1/00 , C10G1/06
摘要： PURPOSE: To obtain a high-concentration slurry by continuously adding coal and a catalyst to a solvent until the resulted slurry comes to have a target viscosity, while applying ultrasonic waves thereto and measuring the viscosity thereof, subsequently stopping the addition, restarting the addition when the viscosity reaches an inflection point, and repeating the above procedure. CONSTITUTION: A solvent 2 is introduced into a slurry preparation tank 4 and sent to a gas/liquid contacting apparatus 7, where the solvent is mixed with an inactive gas, e.g. N2 . The solvent is then fed to an ultrasonic wave applicator 8 with a circulating pump 12. After ultrasonic waves are applied to the solvent, it is circulated to the tank 4. Finely powdered coal 1 and a catalyst 3, e.g. iron sulfide, are then fed to the tank 4. The resulted mixture is circulated through the circulation line with stirring and application of ultrasonic waves. Thus, a slurry is prepared. During the circulation, the slurry viscosity is measured with viscometers 13 and 13' before and after the ultrasonic application. The addition of the coal 1 and the catalyst 3 is continued until the slurry viscosity reaches a target value. The addition is then stopped. The addition is restarted at the time when the slurry viscosity has decreased to an inflection point, and is then continued until the slurry viscosity reaches a target value. Repeating the above procedure gives a high-concentration slurry having evenness of viscosity.

7. 发明专利

JPH06287567A COAL LIQUEFACTION 失效
公开(公告)号：JPH06287567A
公开(公告)日：1994-10-11
申请号：JP7978893
申请日：1993-04-06
申请人： NIPPON STEEL CORP
发明人： KAWABATA MUTSUMARO , SAKAWA MITSUHIRO
IPC分类号： C10G1/00 , C10G1/04 , C10G1/06
摘要： PURPOSE:To liquefy coal at high conversion in high yields by irradiating a coal slurry prepared by mixing feed coal with a solvent and a catalyst with a radiation and subjecting the irradiated slurry to a coal liquefaction reaction in a reducing gas atmosphere. CONSTITUTION:A coal slurry is obtained by feeding a coal slurry obtained by mixing dried feed coal with a solvent in a solvent/coal weight ratio of 1.0-4.0 and 0.5-5wt.%, based on dry coal, fine catalyst particles having a content of 16mum or smaller particles of 90% or above to a preparation tank 9, and mixing the mixture at 40-100 deg.C under a pressure of 1-10 atm in an inert gas atmosphere. The obtained slurry is sent to an irradiator 42 through a circulation pump 41 and a pipe 11 and is irradiated at a dose of 10 -10 R at 40-100 deg.C under a pressure of 1-10 atm. This slurry is pressurized with a high-pressure pump 12 to 100-200 atm, heated with a heater 16 to 350-450 deg.C, fed to a coal liquefaction tower 10 and subjected to a coal liquefaction reaction at 400-500 deg.C for 40-80min in a reducing gas atmosphere.

8. 发明专利

JPH06234979A METHOD OF LIQUEFYING COAL 失效
公开(公告)号：JPH06234979A
公开(公告)日：1994-08-23
申请号：JP2108393
申请日：1993-02-09
申请人： NIPPON STEEL CORP
发明人： KAWABATA MUTSUMARO , NAKAGAWA ASAYUKI , SAKAWA MITSUHIRO
IPC分类号： C10G1/06
摘要： PURPOSE:To reduce fluctuations of the quality of a coal slurry to be subjected to a liquefaction reaction and to attain an improved liquefied-oil yield by applying ultrasonic to the coal slurry during circulation to a slurry preparation tank. CONSTITUTION:A coal 1 is mixed with a solvent 2 and a catalyst 3 in a slurry preparation tank 5 to obtain a slurry. The slurry is circulated, during which ultrasonic is applied (6) to the slurry for an appropriate time in an inert or reducing gas atmosphere. The resulting slurry is subjected to a liquefaction reaction (7). The coal 1, solvent 2, and catalyst 3 are continuously fed to the tank 5 at respective constant rates, while the slurry which has undergone ultrasonic application is continuously sent from the tank 5 to the subsequent liquefaction reactor 7 at a constant rate.

9. 发明专利

JPH06220457A LIQUEFACTION OF COAL 失效
公开(公告)号：JPH06220457A
公开(公告)日：1994-08-09
申请号：JP969493
申请日：1993-01-25
申请人： NIPPON STEEL CORP
发明人： KAWABATA MUTSUMARO , NAKAGAWA ASAYUKI , SAKAWA MITSUHIRO
IPC分类号： C10G1/00 , C10G1/08
摘要： PURPOSE:To provide a method for obtaining liquefied oil in a stable yield through liquefaction of coal, by keeping the quality of a coal slurry constant after irradiation thereof with ultrasonic waves. CONSTITUTION:A method of liquefying coal in the form of a slurry mixed with a solvent in a high-pressure atmosphere of hydrogen in the presence of a catalyst, wherein the viscosity of the slurry is estimated from the properties of the solvent to find an appropriate value of the time of irradiation with ultrasonic waves on the basis of the viscosity of and amt. of the slurry, whereby the slurry is automatically irradiated with ultrasonic waves for an appropriate period of time. This method enables the quality of the slurry irradiated with ultrasonic waves to be kept constant even if there is dispersion of the properties of starting materials such as the solvent. Thus, the liquefied oil can be obtained in a stable yield.

10. 发明专利

JPH11315285A PREPARATION OF COAL SLURRY 失效
公开(公告)号：JPH11315285A
公开(公告)日：1999-11-16
申请号：JP12454898
申请日：1998-05-07
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： KAWABATA MUTSUMARO , IMADA KUNIHIRO , SAKAWAKI KOJI , IGUCHI KENJI
IPC分类号： C10G1/00
摘要： PROBLEM TO BE SOLVED: To provide a method for preparing a coal slurry having a reduced viscosity in a coal liquefaction process by adding a dispersant capable of reducing the viscosity of the slurry to it. SOLUTION: The viscosity of a coal slurry can be reduced in preparing the slurry by mixing a dispersant 27 or a dispersant soln. with coal, crushing the resultant mixture, and dehydrating it, or by mixing under stirring a dispersant with crushed dried coal, or by spraying a dispersant over crushed dried coal and mixing the sprayed coal with a solvent and a catalyst.

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