IN171647B - - Google Patents
Info
- Publication number
- IN171647B IN171647B IN1065/DEL/87A IN1065DE1987A IN171647B IN 171647 B IN171647 B IN 171647B IN 1065DE1987 A IN1065DE1987 A IN 1065DE1987A IN 171647 B IN171647 B IN 171647B
- Authority
- IN
- India
- Prior art keywords
- bed
- adsorbable components
- components
- gas
- feed
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/104—Alumina
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/30—Physical properties of adsorbents
- B01D2253/302—Dimensions
- B01D2253/304—Linear dimensions, e.g. particle shape, diameter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/10—Nitrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/16—Hydrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/22—Carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/10—Single element gases other than halogens
- B01D2257/104—Oxygen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/502—Carbon monoxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
- B01D2257/7022—Aliphatic hydrocarbons
- B01D2257/7025—Methane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
- B01D2259/40028—Depressurization
- B01D2259/4003—Depressurization with two sub-steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
- B01D2259/40028—Depressurization
- B01D2259/40032—Depressurization with three sub-steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
- B01D2259/40035—Equalization
- B01D2259/40041—Equalization with more than three sub-steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
- B01D2259/40043—Purging
- B01D2259/4005—Nature of purge gas
- B01D2259/40052—Recycled product or process gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
- B01D2259/40058—Number of sequence steps, including sub-steps, per cycle
- B01D2259/40066—Six
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
- B01D2259/40058—Number of sequence steps, including sub-steps, per cycle
- B01D2259/40067—Seven
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
- B01D2259/40058—Number of sequence steps, including sub-steps, per cycle
- B01D2259/40071—Nine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
- B01D2259/40058—Number of sequence steps, including sub-steps, per cycle
- B01D2259/40073—Ten
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/404—Further details for adsorption processes and devices using four beds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/406—Further details for adsorption processes and devices using more than four beds
- B01D2259/4062—Further details for adsorption processes and devices using more than four beds using six beds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/406—Further details for adsorption processes and devices using more than four beds
- B01D2259/4066—Further details for adsorption processes and devices using more than four beds using nine beds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/414—Further details for adsorption processes and devices using different types of adsorbents
- B01D2259/4141—Further details for adsorption processes and devices using different types of adsorbents within a single bed
- B01D2259/4145—Further details for adsorption processes and devices using different types of adsorbents within a single bed arranged in series
- B01D2259/4146—Contiguous multilayered adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
- B01D53/0476—Vacuum pressure swing adsorption
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/20—Capture or disposal of greenhouse gases of methane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Gases By Adsorption (AREA)
- Treating Waste Gases (AREA)
- Hydrogen, Water And Hydrids (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/940,612 US4723966A (en) | 1986-12-11 | 1986-12-11 | Gas separation by pressure swing adsorption |
Publications (1)
Publication Number | Publication Date |
---|---|
IN171647B true IN171647B (es) | 1992-11-28 |
Family
ID=25475148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IN1065/DEL/87A IN171647B (es) | 1986-12-11 | 1987-12-11 |
Country Status (11)
Country | Link |
---|---|
US (1) | US4723966A (es) |
EP (1) | EP0271356B1 (es) |
JP (1) | JPS63240915A (es) |
KR (1) | KR920002081B1 (es) |
CN (1) | CN1008065B (es) |
AT (1) | ATE78419T1 (es) |
BR (1) | BR8706710A (es) |
CA (1) | CA1314494C (es) |
DE (1) | DE3780590T2 (es) |
ES (1) | ES2033885T3 (es) |
IN (1) | IN171647B (es) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4783203A (en) * | 1987-10-22 | 1988-11-08 | Union Carbide Corporation | Integrated pressure swing adsorption/membrane separation process |
JPH02129014A (ja) * | 1988-11-04 | 1990-05-17 | Mitsui Eng & Shipbuild Co Ltd | 一酸化炭素ガス製造法 |
US5013337A (en) * | 1988-12-06 | 1991-05-07 | Uop | Process for separating a mixture of molecular species using crystalline microporous metal sulfide compositions |
US5126120A (en) * | 1990-10-02 | 1992-06-30 | Uop | Crystalline microporous zinc phosphate compositions |
US5203888A (en) * | 1990-11-23 | 1993-04-20 | Uop | Pressure swing adsorption process with multiple desorption steps |
US5128025A (en) * | 1991-03-18 | 1992-07-07 | Uop | Hydrocarbon conversion processes using a novel crystalline microporous metal oxysulfide composition |
US5122357A (en) * | 1991-03-18 | 1992-06-16 | Uop | Crystalline microporous metal oxysulfide compositions |
US5302362A (en) * | 1992-04-10 | 1994-04-12 | Uop | Crystalline microporous metallo-zinc phosphate compositions |
US5449450A (en) * | 1992-04-10 | 1995-09-12 | Uop | Hydrocarbon conversion process using a crystalline microporous metallo-zinc phosphate composition |
US5294247A (en) * | 1993-02-26 | 1994-03-15 | Air Products And Chemicals, Inc. | Adsorption process to recover hydrogen from low pressure feeds |
US5411578A (en) * | 1994-05-10 | 1995-05-02 | Air Products And Chemicals, Inc. | Vacuum swing adsorption process with mixed repressurization and provide product depressurization |
US6048384A (en) * | 1997-12-09 | 2000-04-11 | Smolarek; James | PSA process and system using simultaneous top and bottom evacuation of absorbent bed |
US5997612A (en) * | 1998-07-24 | 1999-12-07 | The Boc Group, Inc. | Pressure swing adsorption process and apparatus |
US6245127B1 (en) | 1999-05-27 | 2001-06-12 | Praxair Technology, Inc. | Pressure swing adsorption process and apparatus |
US6660064B2 (en) * | 2002-03-08 | 2003-12-09 | Air Products And Chemicals, Inc. | Activated carbon as sole absorbent in rapid cycle hydrogen PSA |
CA2535842C (en) * | 2003-08-29 | 2012-07-10 | Velocys Inc. | Process for separating nitrogen from methane using microchannel process technology |
US8241400B2 (en) * | 2009-07-15 | 2012-08-14 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process for the production of carbon dioxide utilizing a co-purge pressure swing adsorption unit |
US8752390B2 (en) * | 2010-07-13 | 2014-06-17 | Air Products And Chemicals, Inc. | Method and apparatus for producing power and hydrogen |
US8715617B2 (en) | 2012-03-15 | 2014-05-06 | Air Products And Chemicals, Inc. | Hydrogen production process with low CO2 emissions |
US8778051B2 (en) | 2012-03-15 | 2014-07-15 | Air Products And Chemicals, Inc. | Pressure swing adsorption process |
FR3011480B1 (fr) | 2013-10-04 | 2017-01-27 | Air Liquide | Procede d'adsorption a modulation de pression avec elution supplementaire |
US9808755B2 (en) | 2015-07-24 | 2017-11-07 | Air Products And Chemicals, Inc. | Sour pressure swing adsorption process |
CN107456845B (zh) * | 2017-08-25 | 2023-04-04 | 西南化工研究设计院有限公司 | 一种变压吸附装置及其控制方法 |
KR101987804B1 (ko) * | 2017-11-17 | 2019-06-12 | 한국에너지기술연구원 | 압력순환흡착방법 및 압력순환흡착장치 |
US11613866B1 (en) | 2019-06-14 | 2023-03-28 | Nusfc, Llc | Retainer for closure device |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2944627A (en) * | 1958-02-12 | 1960-07-12 | Exxon Research Engineering Co | Method and apparatus for fractionating gaseous mixtures by adsorption |
US2978407A (en) * | 1958-05-28 | 1961-04-04 | Exxon Research Engineering Co | Molecular sieve separation process |
FR1306111A (fr) * | 1960-09-16 | 1962-10-13 | Union Carbide Corp | Procédé de séparation par adsorption |
NL297067A (es) * | 1962-09-04 | 1900-01-01 | ||
US3430418A (en) * | 1967-08-09 | 1969-03-04 | Union Carbide Corp | Selective adsorption process |
FR2044058A5 (es) * | 1969-05-07 | 1971-02-19 | Air Liquide | |
US3738087A (en) * | 1971-07-01 | 1973-06-12 | Union Carbide Corp | Selective adsorption gas separation process |
US4011065A (en) * | 1974-01-09 | 1977-03-08 | Bergwerksverband Gmbh | Process for the enrichment of gases |
US3986849A (en) * | 1975-11-07 | 1976-10-19 | Union Carbide Corporation | Selective adsorption process |
US4093429A (en) * | 1975-12-19 | 1978-06-06 | General Electric Company | Gas separation system |
DE2604305A1 (de) * | 1976-02-04 | 1977-08-11 | Linde Ag | Verfahren zum zerlegen von gasgemischen |
US4264338A (en) * | 1977-11-02 | 1981-04-28 | Monsanto Company | Method for separating gases |
US4354859A (en) * | 1981-08-06 | 1982-10-19 | Union Carbide Corporation | Enhanced gas separation by selective adsorption |
US4398926A (en) * | 1982-04-23 | 1983-08-16 | Union Carbide Corporation | Enhanced hydrogen recovery from low purity gas streams |
US4512780A (en) * | 1983-11-08 | 1985-04-23 | Union Carbide Corporation | Pressure swing adsorption with intermediate product recovery |
AU571615B2 (en) * | 1983-12-15 | 1988-04-21 | Bergwerksverband Gmbh | Pressure swing adsorbtion of highly adsorbable components |
US4589888A (en) * | 1984-10-05 | 1986-05-20 | Union Carbide Corporation | Pressure swing adsorption process |
DE3528909A1 (de) * | 1985-08-12 | 1987-02-19 | Linde Ag | Druckwechseladsorptionsverfahren |
-
1986
- 1986-12-11 US US06/940,612 patent/US4723966A/en not_active Expired - Fee Related
-
1987
- 1987-12-10 BR BR8706710A patent/BR8706710A/pt not_active IP Right Cessation
- 1987-12-11 CA CA000554115A patent/CA1314494C/en not_active Expired - Fee Related
- 1987-12-11 IN IN1065/DEL/87A patent/IN171647B/en unknown
- 1987-12-11 KR KR1019870014130A patent/KR920002081B1/ko not_active IP Right Cessation
- 1987-12-11 CN CN87107532A patent/CN1008065B/zh not_active Expired
- 1987-12-11 DE DE8787310920T patent/DE3780590T2/de not_active Expired - Lifetime
- 1987-12-11 EP EP87310920A patent/EP0271356B1/en not_active Expired - Lifetime
- 1987-12-11 JP JP62312388A patent/JPS63240915A/ja active Granted
- 1987-12-11 AT AT87310920T patent/ATE78419T1/de not_active IP Right Cessation
- 1987-12-11 ES ES198787310920T patent/ES2033885T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CN1008065B (zh) | 1990-05-23 |
EP0271356A2 (en) | 1988-06-15 |
EP0271356A3 (en) | 1989-05-31 |
ES2033885T3 (es) | 1993-04-01 |
ATE78419T1 (de) | 1992-08-15 |
JPH0321207B2 (es) | 1991-03-22 |
KR880007110A (ko) | 1988-08-26 |
CA1314494C (en) | 1993-03-16 |
CN87107532A (zh) | 1988-08-03 |
EP0271356B1 (en) | 1992-07-22 |
KR920002081B1 (ko) | 1992-03-10 |
DE3780590T2 (de) | 1992-12-17 |
DE3780590D1 (de) | 1992-08-27 |
BR8706710A (pt) | 1988-07-19 |
US4723966A (en) | 1988-02-09 |
JPS63240915A (ja) | 1988-10-06 |
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