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公开(公告)号：JPH03287550A
公开(公告)日：1991-12-18
申请号：JP8873890
申请日：1990-04-03
Applicant: AGENCY IND SCIENCE TECHN
Inventor： SAKO TAKESHI , SATO SHINJI , SUGATA TAKESHI , NAKAZAWA NOBUAKI , YAMANE SUMIYO
Abstract: PURPOSE:To safely, inexpensively and simply separate a polycyclic aromatic compound in a energy-saving state from a mixture such as petroleum refined oil or coal tar with supercritical carbon dioxide as a extraction and crystallization solvent. CONSTITUTION:A raw material mixture is charged into an extraction tank 7 and super critical carbon dioxide is fed into the extraction tank 7 through a high pressure pump 2 and a pre-heating coil 5 to extract the mixture with the super critical carbon dioxide. The temperature and pressure of the extraction tank 7 are controlled with an air constant temperature bath and a back pressure valve 3. After the extraction the super critical fluid containing the mixture is fed from the constant temperature tank 10 into a crystallization tank 12 maintained at a prescribed temperature and only the objective component in the mixture is deposited. The super critical fluid containing the solutes in the crystallization tank is substituted with the pure super critical fluid and subsequently the pressure in the tank is reduced to the atmospheric pressure to recover the component. Since the process can be operated at a relatively low temperature, the pyrolysis and polymerization of the target substance can be prevented.
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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：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：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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Patent Agency Ranking
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：JPH02274269A
公开(公告)日：1990-11-08
申请号：JP9612089
申请日：1989-04-14
Applicant: AGENCY IND SCIENCE TECHN
Inventor： SUGATA TAKESHI , OKUBO TEIJI , SATO SHINJI , SAKO TAKESHI , NAKAZAWA NOBUAKI
Abstract: PURPOSE:To easily constitute a process of rendering fluorocarbon or fluorocarbon-containing materials harmless and prevent emission of harmful materials out of a system by decomposing the fluorocarbon or fluorocarbon- containing materials inside a high temperature - high pressurized water in a temperature and a pressure (supercritical) condition exceeding the critical temperature and critical pressure. CONSTITUTION:A high temperature - high pressurized water is fed to a reactor together with a fluorocarbon or fluorocarbon-containing material. As the conditions of that time, a temperature exceeding the critical temperature of water, for example, 380 deg.C or more, and a pressure over the critical pressure of water, for example, 300atm or more, are preferred. The feed quantity of fluorocarbon is preferably less than 1/100 by mole ratio to water. When the fluorocarbon is chlorofluoromethane containing no hydrogen, the greater part is hydrolyzed in this reactor, forming carbon dioxide water, and hydrogen halide. The hydrogen halide in the product is neutralized by alkali and made harmless.
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公开(公告)号：JPS63112536A
公开(公告)日：1988-05-17
申请号：JP25949586
申请日：1986-10-30
Applicant: AGENCY IND SCIENCE TECHN
Inventor： SAKO TAKESHI , YOKOCHI TOSHIHIRO , SATO SHINJI , SUZUKI OSAMU , SHIRATA TOSHIKATSU , SUGATA TAKESHI , NAKAZAWA NOBUAKI
IPC: C07C57/12 , B01D15/08 , C07C51/00 , C07C51/47 , C07C67/00 , C07C67/56 , C07C69/58 , C11C1/08 , G01N30/02
Abstract: PURPOSE:To concentrate and purify gamma-linolenic acid, by subjecting a fatty acid mixture from a natural fat or oil or fatty acid lower alkyl ester mixture to supercritical fluid chromatography. CONSTITUTION:A fatty acid mixture obtained by hydrolyzing a natural fat or oil containing gamma-linolenic acid or fatty acid lower alkyl ester prepared by ester interchange with a lower alcohol is directly fractionated or subjected to urea addition treatment and fractionated by chromatography using a supercritical fluid, e.g. carbon dioxide, flon, etc., in a supercritical state, as a mobile phase to collect a gamma-linolenic acid fraction and carry out concentrating and purifying of the gamma-linolenic acid. The mobile phase is inexpensive and nontoxic without requiring vacuum distillation in the final step and deterioration of yield by thermal denaturation of separation products. A short time is sufficient for the treatment.
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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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