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1. 发明专利

JPH03277690A PREPARATION OF BINDER PITCH FOR USE IN CARBON MATERIALS 失效
公开(公告)号：JPH03277690A
公开(公告)日：1991-12-09
申请号：JP7559590
申请日：1990-03-27
申请人： NIPPON STEEL CHEMICAL CO
发明人： KANBE MASAZUMI , MIURA KUNIO , MIWA SHIGERU , SHIBUYA TADASHI
IPC分类号： C10C3/02 , C10C3/08
摘要： PURPOSE:To simply and inexpensively obtain the title pitch which has a high fixed carbon content and a high beta-resin content and generates no mesophase pitch by extracting coal tar pitch with a specific hydrocarbon solvent in a supercritical state of the solvent and removing lightweight fractions. CONSTITUTION:Coal tar pitch (preferably pitch having a softening point of 70 deg.C or below and 0.5-7.0wt.% quinoline-insolubles, obtained by distillation of coal tar secondary produced in the carbonization of coal) and a paraffin or an aromatic hydrocarbon solvent are charged into an extraction zone which is maintained at a temp. from the critical temp. of the solvent to 370 deg.C and a pressure from the critical pressure of the solvent to 100kg/cm G and at a solvent/coal tar pitch weight ratio of 0.5-6.0. The lightweight fractions in coal tar pitch are removed by extraction so that the softening point of the pitch is adjusted to 80-200 deg.C. Thus, binder pitch for carbon material use which has a high fixed carbon content and a high beta-resin content and generates no mesophase pitch can be obtained by an extremely simple and inexpensive means without use of a complex process and a lot of secondary materials.

2. 发明专利

JPH04224186A FORMATION OF OXIDATION-RESISTANT FILM ON HIGH-DENSITY CARBON MATERIAL FORMED ARTICLE 失效
公开(公告)号：JPH04224186A
公开(公告)日：1992-08-13
申请号：JP41289290
申请日：1990-12-25
申请人： NIPPON STEEL CHEMICAL CO
发明人： ARAI KUNIO , AJIRI MASAFUMI , KAWANO YOICHI , MIURA KUNIO
IPC分类号： C04B41/87
摘要： PURPOSE:To form the oxidation-resistant film of a metal carbide on the surface of a carbon material at a lower temp. by uniformly applying a soln. of an organometallic polymer utilizing a supercritical fluid as a poor solvent forming fluid and carbonizing the polymer. CONSTITUTION:A critical fluid such as carbon dioxide is dissolved in a soln. of an organometallic polymer such as polycarbosilane. Consequently, the soln. is extremely lowered in viscosity, the soln. intrudes easily even into the pore of a high-density carbon material, the solvent is made poorer, and a uniform film is formed in the pore by the polymer. Accordingly, the carbon material is heated to about 1200-1500 deg.C to form a ceramic film of SiC, SiO2, etc., on the surface of the material including the pore, the material is not oxidized or worn from the pore, and a high-density carbon material excellent in oxidation resistance is obtained.

3. 发明专利

JPH03269091A PURIFICATION OF AROMATIC OIL 失效
公开(公告)号：JPH03269091A
公开(公告)日：1991-11-29
申请号：JP6864590
申请日：1990-03-19
申请人： NIPPON STEEL CHEMICAL CO
发明人： ARAI KUNIO , AJIRI MASAFUMI , MIURA KUNIO , FURUMOTO MASASHI , KANBE MASAZUMI
IPC分类号： C10G45/06 , C10C1/18 , C10C1/20 , C10C3/08 , C10G45/08 , C10G45/30
摘要： PURPOSE:To enable continuous desulfurization and denitrogenation of an aromatic oil under a low consumption of hydrogen for a long period while preventing lowering of the catalytic activity by bringing the aromatic oil into contact with a hydrogenation catalyst in the presence of a hydrogen-donative solvent in a specified condition. CONSTITUTION:One or more aromatic oils of coal-tar oil, tar oil, coal-tar pitch, liquefied coal oil, an oil obtained by heat treatment or solvent extraction thereof, etc., are brought into contact with a hydrogenation catalyst preferably composed of an oxide or a sulfide of a VIB group or VIII group element supported on a fire-resistant inorganic oxide carrier in the presence of a hydrogen-donative solvent consisting of a hydrogenated aromatic compound such as tetralin, decalin or cyclohexylbenzene at a temperature and pressure (e.g. 380-400 deg.C and 50-200kg/cm G)>=those at the critical point of the above mentioned solvent, thuspurifying the aromatic oils.

4. 发明专利

JPH03143989A PREPARING NEEDLE COKE 失效
公开(公告)号：JPH03143989A
公开(公告)日：1991-06-19
申请号：JP28177789
申请日：1989-10-31
申请人： NIPPON STEEL CHEMICAL CO
发明人： MOCHIDA ISAO , USUHA HIDEHIKO , MIURA KUNIO
IPC分类号： C10B55/00
摘要： PURPOSE:To obtain readily and economically needle coke which has a lower CTE value and hardly undergoes puffing by bringing a coal tar-based raw material from which quinoline-insoluble components have been removed into contact with a solid acid to remove a basic nitrogen compound therefrom, followed by coking. CONSTITUTION:A coal tar-based raw material from which quinoline-insoluble components have been removed is brought into contact with a solid acid to remove a basic nitrogen compound therefrom, followed by coking. Any solid acid can be employed as long as it is acidic in a solid state. Examples of suitable solid acids include silica, alumina and acid clay. It is preferred that the solid acid be a fired metal salt which is acidic in a dry state but neutral when it contains moisture. Examples of such metal salts include nickel sulfate, copper sulfate, aluminum sulfate, zinc sulfate and manganese sulfate.

5. 发明专利

JPH06146119A PITCH-BASED CARBON FIBER ROVING 失效
公开(公告)号：JPH06146119A
公开(公告)日：1994-05-27
申请号：JP31269692
申请日：1992-10-29
申请人： NIPPON STEEL CORP , NIPPON STEEL CHEMICAL CO
发明人： ARAI YUTAKA , KOBAYASHI TAKESHI , MIURA KUNIO , TADOKORO HIROYUKI
IPC分类号： D01D4/02 , D01F9/14
摘要： PURPOSE:To obtain a pitch-based carbon fiber roving composed of fine denier fibers, having excellent handling property and exhibiting excellent productivity in the production of a composite product. CONSTITUTION:This pitch-based carbon fiber roving is composed of 1,000-100,000 continuous fibers having an average fiber diameter of 4-8mum and formed in non-doubled state. The roving composed of fine-denier fibers has a tensile strength of >=3.5GPa, an elastic modulus of >=600GPa and a flexural strength B satisfying the following formula; B>=1/(2.875X10 TM-0.17), wherein B is flexural strength (MPa) and TM is tensile elastic modulus (GPa). The handling property of pitch-based high-modulus carbon fiber can be improved by the use of the carbon fiber roving to enable the use of the fiber for various composite materials.

6. 发明专利

JPH0665814A PRECURSOR OF ACTIVATED CARBON FIBER AND ITS PRODUCTION 失效
公开(公告)号：JPH0665814A
公开(公告)日：1994-03-08
申请号：JP23757292
申请日：1992-08-14
申请人： NIPPON STEEL CORP , NIPPON STEEL CHEMICAL CO
发明人： KOBAYASHI TAKESHI , MIURA KUNIO , ARAI YUTAKA
IPC分类号： C01B31/02 , D01F9/14
摘要： PURPOSE:To provide the subject precursor, large in fine pore size and excellent in productivity and activity yield, for producing activated carbon fibers useful as polarizable electrode material, e. g. for a capacitor having an electric double layer or battery. CONSTITUTION:The objective precursor of, infusibilized carbon fibers 0.05-0.10 and >=4.5 in atom number ratios O/C and O/N, respectively, can be obtained by infusibilizing pitch fibers obtained by spinning isotropic pitch, in an oxidative gas atmosphere containing NO2 and O2 while raising temperature to 100-350 deg.C and gradually reducing NO2 concentration.

7. 发明专利

JPH06136621A PRODUCTION OF PITCH-BASED FINE CARBON FIBER AND SPINNING NOZZLE THEREFOR 失效
公开(公告)号：JPH06136621A
公开(公告)日：1994-05-17
申请号：JP31084892
申请日：1992-10-27
申请人： NIPPON STEEL CORP , NIPPON STEEL CHEMICAL CO
发明人： ARAI YUTAKA , KOBAYASHI TAKESHI , MIURA KUNIO , TADOKORO HIROYUKI
IPC分类号： D01D4/00 , D01F9/14
摘要： PURPOSE:To provide a spinning nozzle for the subject multifilament pitch-based fine carbon fibers excellent in handling, and to provide a production method for such fibers. CONSTITUTION:This spinning nozzle has the following characteristics: (1) there are 1000 or more capillary holes on the nozzle plate, (2) the capillaries are concentrically arranged in 3 to 20 rows and divided into two or more blocks, (3) there is a columnar projection of >=20mm height at the center, and (4) the diameter of each capillary is 50-110mum. The other objective carbon fibers can be obtained using this spinning nozzle.

8. 发明专利

JPH04222662A METHOD FOR FORMING POLYMER FILM TO SURFACE OF SOLID 失效
公开(公告)号：JPH04222662A
公开(公告)日：1992-08-12
申请号：JP41289390
申请日：1990-12-25
申请人： NIPPON STEEL CHEMICAL CO
发明人： ARAI KUNIO , AJIRI MASAFUMI , KAWANO YOICHI , MIURA KUNIO
IPC分类号： B05D1/18 , C08J7/04 , C23C18/00
摘要： PURPOSE:To form a uniform polymer film to the surface of a solid by a method wherein a fluid in a supercritical state is dissolved in a solvent solution of a polymer to convert the solution to a poor solvent with respect to the polymer and the polymer is precipitated on the surface of the solid allowed to be present in the system. CONSTITUTION:A fluid (e.g. carbon dioxide) in a supercritical state is dissolved in a solvent solution of a polymer to convert the solution to a poor solvent with respect to the polymer and the polymer is precipitated on the surface of the solid (e.g. metal) allowed to be present in the system. As a result, a uniform polymer film can be formed to the surface of the solid. The film forming condition of the surface of the solid allowed to be present in the system is controlled by the concn. of the solvent solution of the polymer, the temp. in the system, the surface temp. of the solid and/or pressure.

9. 发明专利

JPH04145193A PRODUCTION OF NEEDLE COKE 失效
公开(公告)号：JPH04145193A
公开(公告)日：1992-05-19
申请号：JP26639790
申请日：1990-10-05
申请人： NIPPON STEEL CHEMICAL CO
发明人： OISHI TAIJI , MIWA SHIGERU , WATANABE HISANOBU , MIYATA KIICHIRO , MIURA KUNIO
IPC分类号： C10B31/00 , C10B57/04
摘要： PURPOSE:To obtain the title coke low in both CTE and puffing and high in the bulk density of the calcinated coke therefrom by mixing quinoline insolubles- free coal tar-based heavy oil and virtually quinoline insolubles-free decanted oil of specific composition followed by conversion to coke. CONSTITUTION:The objective needle coke can be obtained by mixing (A) coal tar-based heavy oil freed from quinoline insolubles in advance and (B) a decanted oil =0.65 and >=10%, respectively, followed by conversion to coke.

10. 发明专利

JPH0386789A METHOD FOR FRACTIONATING BETA RESIN 失效
公开(公告)号：JPH0386789A
公开(公告)日：1991-04-11
申请号：JP22319089
申请日：1989-08-31
申请人： NIPPON STEEL CHEMICAL CO
发明人： MIURA KUNIO , KANBE MASAZUMI , SUMIMOTO ISAO
IPC分类号： C10C3/00 , C10C3/08
摘要： PURPOSE:To efficiently produce beta-resin useful as a raw material for a highly value-added carbon product using simple equipment by treating coal tar pitch with solvents under specific conditions. CONSTITUTION:Coal tar pitch 4 pref. having a softening point of 100 deg.C or lower and a mixed solvent 5 comprising the first arom. solvent (e.g. coker gas oil) and an aliph. solvent (e.g. kerosene) are introduced into the first fractionating zone 1, where they are mixed and kept standing to separate into two phases, a low-density liq. 7 and a high density liq. 8 mainly comprising quinoline-insols. (e.g. carbon, ash, and other inorg. matters), and both liqs. are separately taken out. After the solvent 9 of the low density liq. 7 is removed, the solvent-free low density liq. 10 and the second arom. solvent (e.g. toluene) are introduced in a wt. ratio of the second solvent to the coal tar pitch component of 0.5-5 into the second fractionating zone 2, where they are kept at a temp. in the range of from the critical temp. of the second arom. solvent to 370 deg.C under a pressure in the range of from the critical pressure of the second arom. solvent to 100kg/cm G to separate into two phases, a low density liq. 13 mainly comprising toluene-sols. and a high density liq. 14 mainly comprising beta-resin, and both liqs. 13 and 14 are separately taken out.

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