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公开(公告)号：JPH10204206A
公开(公告)日：1998-08-04
申请号：JP19837197
申请日：1997-07-24
Applicant: AGENCY IND SCIENCE TECHN , TOSHIBA CORP
Inventor： SAKO TAKESHI , SATO SHINJI , AKAI YOSHIE , SHIGENIWA SHINOBU , YAMADA KAZUYA
Abstract: PROBLEM TO BE SOLVED: To provide a method for surely decomposing an ion exchange resin into carbon dioxide in a short time without the need for any catalyst, and to provide a method for preventing the relevant structure from corrosion during the above decomposition in supercritical water. SOLUTION: An ion exchange resin is mixed with water followed by addition of an oxidizing agent such as hydrogen peroxide or ozone, and the system is held for a given time in the presence of an inert gas at such high temperatures and pressures as to exceed the critical point of water and, if needed, under irradiation of ultraviolet radiation or the like, thus decomposing the ion exchange resin. For harmful component elimination process, a process designed to add salt and/or alkali to the process so as to absorb harmful components and a second process for separating the resultant harmful solid are added to the above decomposition process.
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公开(公告)号：JPH02291942A
公开(公告)日：1990-12-03
申请号：JP11270589
申请日：1989-05-01
Applicant: AGENCY IND SCIENCE TECHN
Inventor： NAKAZAWA NOBUAKI , SUGATA TAKESHI , SAKO TAKESHI , SUZUKI MORIO , OKUBO TEIJI , SATO SHINJI , WAKABAYASHI KATSUHIKO
IPC: G01N11/16
Abstract: PURPOSE:To make it possible to measure the coefficient of viscosity simply and accurately by constituting an apparatus with a vibrator, a circuit for grounding a housing, a variable capacitor, dielectric-loss measuring device, and a balance detector. CONSTITUTION:A torsional vibrator 1 is held in a sample fluid cell 3 with housings 2. The inside of the cell 3 is filled with a fluid to be measured. Electrodes which are provided on the surfaces of the vibrator 1 are connected to the measuring bridge terminals of a dielectric-loss measuring device 4 through conductor wires 5. A synthesizer 6 which imparts a frequency input and a bal ance detector 7 which detects the balance of the bridge are connected to the corresponding terminals of the measuring device 4. The housing 2 is grounded to the grounding terminal of the bridge through a conductor wire 8. Thus the effect of the housing 2 in measurement is removed. A zero-position moving variable capacitor 9 which is connected to the vibrator 1 in parallel is prepared. The capacitance of the capacitor 9 is selected in measuring the width of a half value. Therefore, the zero position of the capacitance of the dielectric-loss measuring device corresponding to the capacitance of the capacitor 9 can be arbitrarily selected.
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公开(公告)号：JPS63282462A
公开(公告)日：1988-11-18
申请号：JP11715687
申请日：1987-05-15
Applicant: AGENCY IND SCIENCE TECHN , KAWASAKI HEAVY IND LTD
Inventor： FUJIWARA ICHIRO , EBE MASANORI , SATO SHINJI
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公开(公告)号：JPS63200059A
公开(公告)日：1988-08-18
申请号：JP3370987
申请日：1987-02-17
Applicant: AGENCY IND SCIENCE TECHN
Inventor： SUGATA TAKESHI , SATO SHINJI , SAKO TAKESHI , SAKAKI KEIICHI , NAKAZAWA NOBUAKI , SHIRATA TOSHIKATSU
Abstract: PURPOSE:To portionwise sample a fractionated component at high purity efficiently and continuously without using an adsorbing column and without receiving the restriction of the number of times of fractionation, by providing a change-over valve between a separation column and a low pressure side and portionwise sampling the fractionated component by the operation of the change-over valve. CONSTITUTION:The first flow channel consisting of lines 9, 10 connects a change-over valve 2 and a separation column 1 and the second flow channel composed of a line 12 connects the change-over valve 2 and the separation column 1 through a minute flow rate control valve 7. The third flow channel consisting of lines 14, 15, 24 connects the change-over valve 2 and a low pressure region through a back pressure control valve 8, and the fourth flow channel consisting of lines 16-18, 20-22, 23 connects the change-over valve 2 and the low pressure region through a portionwise sampling change-over valve 3 and portionwise sampling containers a-c. When a supercritical fluid having a mixture to be separated dissolved therein is introduced into the separation column 1, the supercritical fluid wherein the mixture is fractionated into respective components is allowed to flow out from the separation column 1 in a time series manner. Hereupon, the change-over valves 2, 3 are operated in relation to a fractionated component detector 6 and the connection state of each flow channel is altered and each of the fractionated components is portionwise sampled in each of the portionwise sampling containers a-c.
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公开(公告)号：JPH1087872A
公开(公告)日：1998-04-07
申请号：JP26124096
申请日：1996-09-09
Applicant: AGENCY IND SCIENCE TECHN , KUMAMOTO PREFECTURE
Inventor： SUGATA TAKESHI , NAKANE TAKASHI , SAKO TAKESHI , OTAKE KATSUTO , UENO KATSUHIKO , SATO SHINJI , NAGAOKA SHOJI , NAGATA MASANORI , NAGAYAMA SANPEI , KAMIMURA MAKOTO
IPC: C08J11/10
Abstract: PROBLEM TO BE SOLVED: To enable reinforcing fibers to be separated, recovered, and reused efficiently without damaging the fibers by bringing a fiber-reinforced plastic into contact and reaction with (sub)supercritical water. SOLUTION: After a fiber-reinforced plastic is charged into a reactor 1 and water supplied from a water cylinder 2 to a water tank 3 is charged into the reator 1 through a high-pressure pump 4 so that water occupies 1-50vol.% of the reactor 1, valves 5, 6 are closed and the reactor 1 is hermetically sealed. Then, a heat exchanger 8 and the reactor 1 are heated to 320-500 deg.C with a constant temp. bath 7 to bring water in the reactor 1 into a (sub)supercritical state. The reinforced plastic is brought into contact with the water in a (sub) supercritical state and thus is reacted. The reactor 1 is then returned to normal temp. and the valve 6 is opened to separate and recover a gaseous part contg. hydrocarbons, carbon dioxide, nitrogen, etc., through a trap 9.
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Patent Agency Ranking
公开(公告)号：JPH02142739A
公开(公告)日：1990-05-31
申请号：JP29580188
申请日：1988-11-22
Applicant: AGENCY IND SCIENCE TECHN
Inventor： SAKO TAKESHI , SATO SHINJI , SUGATA TAKESHI , NAKAZAWA NOBUAKI , OKUBO TEIJI , SUZUKI MORIO , WAKABAYASHI KATSUHIKO
Abstract: PURPOSE:To industrially and advantageously isomerize a 4-10C n-paraffin into a paraffin having side chains without adding H2 gas into a reaction system by using a solid catalyst in a mixed fluid of the reactant and product in a supercritical state. CONSTITUTION:A 4-10C n-paraffin is introduced into a reactor filled with a solid catalyst supporting Pt on Y type zeolite, etc., and isomerized under conditions of higher reaction temperature and reaction pressure than the critical temperature and pressure of a mixed fluid consisting of the reactant and product in the reaction vessel without adding H2 gas into the reaction system. The mixed fluid of the unreacted reactant and the product emerging from the reactor is then decompressed to take out the paraffin as an isomerized paraffin product having side chains.
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公开(公告)号：JPS63216845A
公开(公告)日：1988-09-09
申请号：JP5098487
申请日：1987-03-05
Applicant: AGENCY IND SCIENCE TECHN
Inventor： SAKAKI KEIJI , SAKO TAKESHI , SATO SHINJI , SUGATA TAKESHI , SUZUKI OSAMU , NAKAZAWA NOBUAKI , SHIRATA TOSHIKATSU , YOKOCHI TOSHIHIRO
Abstract: PURPOSE:To obtain the titled compound inexpensively, in high yield and harmlessly to human body without requiring removal of organic solvent by vacuum distillation, by fractionating gamma-linolenic acid containing natural fats and oils by chromatography using a supercritical fluid as a mobile phase. CONSTITUTION:gamma-Linolenic acid-containing natural fats and oils are fractionated by chromatography using a supercritical fluid as a mobile phase and a gamma- linolenic acid-containing glyceride fraction is collected to give the aimed com pound. A hydrocarbon such as methane or ethane besides carbon dioxide and freon is used as the supercritical fluid. The supercritical condition is >=72.4kg/cm pressure and >=31.0 deg.C temperature in the case of carbon dioxide. A small amount of ethanol, butane, etc., having 40-120 deg.C boiling point is added to the supercritical fluid so that separating performance is improved. The partial collection condition by the supercritical chromatography is preferably 35-60 deg.C temperature and 90-250kg/cm pressure.
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公开(公告)号：JPH02108682A
公开(公告)日：1990-04-20
申请号：JP25990388
申请日：1988-10-14
Applicant: AGENCY IND SCIENCE TECHN
Inventor： SUGATA TAKESHI , NAKAZAWA NOBUAKI , OGAWA HIROTSUGU , SATO SHINJI , SAKO TAKESHI , OKUBO TEIJI , WAKABAYASHI KATSUHIKO
IPC: C07D307/50 , C07B61/00
Abstract: PURPOSE:To efficiently obtain highly concentrated furfural by extracting aqueous solution, etc., containing pentose such as xylose by using acid as catalyst and using supercritical fluid. CONSTITUTION:In a process producing furfural from aqueous solution containing pentose such as xylose or hemicellulose in plant body using acid as catalyst, a fluid having temperature and pressure exceeding critical temperature and critical pressure is made into contact with reacting liquid in reacting vessel and circulated, then furfural is extracted and recovered to outside of the reaction system. Preferably, the supercritical fluid containing furfural is circulated through a filling column having structure refluxing a part of concentrated liquid and the other concentrating column, thus concentration of furfural is enriched.
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公开(公告)号：JPS6244170A
公开(公告)日：1987-02-26
申请号：JP18148185
申请日：1985-08-19
Applicant: AGENCY IND SCIENCE TECHN
Inventor： SAKO TAKESHI , YOKOCHI TOSHIHIRO , SATO SHINJI , SUZUKI OSAMU , SHIRATA TOSHIKATSU , SUGATA TAKESHI , NAKAZAWA NOBUAKI
Abstract: PURPOSE:To advantageously extract a valuable component contained in a mold of the genus Mortierella, by pretreating the mold by heating followed by grinding and treating it by supercritical fluid or by supercritical fluid using an alcohol and/or a hydrocarbon. CONSTITUTION:A mold of the genus Mortierella is heated and ground by mechanical force, or ground in an alcohol solvent by mechanical force and the mold is pretreated. In the case, the mold is heated at 150-200 deg.C and the mold is pulverized into . Consequently, approximately 100% neutral lipid in the mold can be extracted ad further separation of the lipid from the solvent can be advantageously carried out at a fixed temperature by operation under reduced pressure, etc.
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公开(公告)号：JPH10225632A
公开(公告)日：1998-08-25
申请号：JP11596697
申请日：1997-05-07
Applicant: AGENCY IND SCIENCE TECHN
Inventor： SAKO TAKESHI , SATO SHINJI , SUGATA TAKESHI , OTAKE KATSUTO , OKANO MAKOTO
Abstract: PROBLEM TO BE SOLVED: To detoxicate polychlorinated biphenyl by decomposing it with supercritical water alone, supercritical water admixed with alkali or supercritical water admixed with alkali and an oxidizing agent. SOLUTION: About 50-150 weight units of water, based on one weight unit of PCB, 50-150 weight units of water and 1-5 weight units of such an alkali as sodium hydroxide or 50-150 weight units of water, 2-20 weight units of an oxidizing agent such as hydrogen peroxide and 1-5 weight units of an alkali such as sodium hydroxide are filled in a reactor and heated above the critical temp. of water in a heating furnace. The reaction pressure is adjusted in accordance with the weight of water filled in the reactor, and the reaction time is controlled to 5-60min. Oxygen, air, etc., are used as the oxidizing agent as well as hydrogen peroxide. Sodium carbonate is used as the alkali besides sodium hydroxide. Consequently, the high reaction temp. and long reaction time are not needed to make polychlorinated biphenyl harmless without causing the resynthesis of PCB.
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