NO754245L - - Google Patents

Info

Publication number: NO754245L
Authority: NO; Norway

Application number

NO754245A

Other languages

Norwegian (no)

Other versions

NO144570B (en

NO144570C (en

Inventor

J W Shepard

J L Jezl

E F Peters

R D Hall

M J Spangler

G O Michaels

Original Assignee

Standard Oil Co

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1974-12-16

Filing date

1975-12-12

Publication date

1976-06-17

1974-12-16 Priority claimed from US05/533,019 external-priority patent/US3957448A/en

1974-12-16 Priority claimed from US05/533,021 external-priority patent/US3971768A/en

1975-12-12 Application filed by Standard Oil Co filed Critical Standard Oil Co

1976-06-17 Publication of NO754245L publication Critical patent/NO754245L/no

1981-06-15 Publication of NO144570B publication Critical patent/NO144570B/en

1981-09-23 Publication of NO144570C publication Critical patent/NO144570C/en

Links

Classifications

- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
- B01J19/1868—Stationary reactors having moving elements inside resulting in a loop-type movement
- B01J19/1881—Stationary reactors having moving elements inside resulting in a loop-type movement externally, i.e. the mixture leaving the vessel and subsequently re-entering it
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/08—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles
- B01J8/10—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles moved by stirrers or by rotary drums or rotary receptacles or endless belts
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/1836—Heating and cooling the reactor
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
- B01J8/36—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed through which there is an essentially horizontal flow of particles
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
- B01J8/38—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed containing a rotatable device or being subject to rotation or to a circulatory movement, i.e. leaving a vessel and subsequently re-entering it
- B01J8/382—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed containing a rotatable device or being subject to rotation or to a circulatory movement, i.e. leaving a vessel and subsequently re-entering it with a rotatable device only
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/34—Polymerisation in gaseous state
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/00026—Controlling or regulating the heat exchange system
- B01J2208/00035—Controlling or regulating the heat exchange system involving measured parameters
- B01J2208/0007—Pressure measurement
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/00026—Controlling or regulating the heat exchange system
- B01J2208/00035—Controlling or regulating the heat exchange system involving measured parameters
- B01J2208/00088—Flow rate measurement
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/00106—Controlling the temperature by indirect heat exchange
- B01J2208/00168—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles
- B01J2208/00212—Plates; Jackets; Cylinders
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/00106—Controlling the temperature by indirect heat exchange
- B01J2208/00168—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles
- B01J2208/00256—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles in a heat exchanger for the heat exchange medium separate from the reactor
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/00327—Controlling the temperature by direct heat exchange
- B01J2208/00336—Controlling the temperature by direct heat exchange adding a temperature modifying medium to the reactants
- B01J2208/00353—Non-cryogenic fluids
- B01J2208/00362—Liquid
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/00389—Controlling the temperature using electric heating or cooling elements
- B01J2208/00407—Controlling the temperature using electric heating or cooling elements outside the reactor bed
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/0053—Controlling multiple zones along the direction of flow, e.g. pre-heating and after-cooling
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00796—Details of the reactor or of the particulate material
- B01J2208/00823—Mixing elements
- B01J2208/00831—Stationary elements
- B01J2208/0084—Stationary elements inside the bed, e.g. baffles
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00761—Details of the reactor
- B01J2219/00763—Baffles
- B01J2219/00765—Baffles attached to the reactor wall
- B01J2219/00768—Baffles attached to the reactor wall vertical
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/18—Details relating to the spatial orientation of the reactor
- B01J2219/182—Details relating to the spatial orientation of the reactor horizontal
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/19—Details relating to the geometry of the reactor
- B01J2219/194—Details relating to the geometry of the reactor round
- B01J2219/1941—Details relating to the geometry of the reactor round circular or disk-shaped
- B01J2219/1943—Details relating to the geometry of the reactor round circular or disk-shaped cylindrical
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/02—Ethene
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F210/16—Copolymers of ethene with alpha-alkenes, e.g. EP rubbers

Landscapes

Chemical & Material Sciences (AREA)
Chemical Kinetics & Catalysis (AREA)
Organic Chemistry (AREA)
Engineering & Computer Science (AREA)
Combustion & Propulsion (AREA)
Health & Medical Sciences (AREA)
Medicinal Chemistry (AREA)
Polymers & Plastics (AREA)
Polymerisation Methods In General (AREA)
Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

NO754245A 1974-12-16 1975-12-12 CONTINUOUS PROCEDURE FOR VAPOR PHASE POLYMERIZATION OF A EVAPORABLE POLYMER, AND APPARATUS FOR CARRYING OUT THE PROCEDURE NO144570C (en)

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
US53302074A	1974-12-16	1974-12-16
US05/533,019 US3957448A (en)	1974-12-16	1974-12-16	Divided horizontal reactor for the vapor phase polymerization of monomers at different hydrogen levels
US05/533,021 US3971768A (en)	1974-12-16	1974-12-16	Vapor phase reactor off-gas recycle system for use in the vapor state polymerization of monomers

Publications (3)

Publication Number	Publication Date
NO754245L true NO754245L (en)	1976-06-17
NO144570B NO144570B (en)	1981-06-15
NO144570C NO144570C (en)	1981-09-23

Family

ID=27415110

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NO754245A NO144570C (en)	1974-12-16	1975-12-12	CONTINUOUS PROCEDURE FOR VAPOR PHASE POLYMERIZATION OF A EVAPORABLE POLYMER, AND APPARATUS FOR CARRYING OUT THE PROCEDURE

Country Status (13)

Country	Link
JP (1)	JPS5921321B2 (en)
AR (1)	AR219479A1 (en)
AT (1)	AT351254B (en)
BR (1)	BR7508335A (en)
DD (1)	DD124882A5 (en)
DE (1)	DE2556418C2 (en)
ES (1)	ES443515A1 (en)
FR (1)	FR2335526A1 (en)
GB (1)	GB1525978A (en)
IN (1)	IN145649B (en)
IT (1)	IT1052588B (en)
NL (1)	NL183891C (en)
NO (1)	NO144570C (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS532585A (en) *	1976-06-29	1978-01-11	Sumitomo Chem Co Ltd	Preparation of polyethylene
US4130699A (en) *	1977-11-25	1978-12-19	Standard Oil Company (Indiana)	Vapor phase polymerization with temporarily inactive titanium catalyst
JPS56159205A (en) *	1980-05-14	1981-12-08	Nippon Oil Co Ltd	Equipment for olefin gas-phase polymerization
JPS56129204A (en) *	1980-03-14	1981-10-09	Nippon Oil Co Ltd	Apparatus for vapor-phase polymerization of olefin
JPS59124911A (en) *	1982-12-29	1984-07-19	Chisso Corp	Production of polypropylene
US4535134A (en) *	1983-03-31	1985-08-13	Standard Oil Company (Indiana)	Method and apparatus for controlling the discharge of product from vapor phase polymerization of monomers in a horizontal stirred-bed reactor
EP0156060B1 (en) *	1984-03-15	1988-11-17	Hoxan Corporation	Apparatus for producing polyacetylene film
DE3514367A1 (en) *	1985-04-20	1986-10-23	Basf Ag, 6700 Ludwigshafen	DEVICE FOR SOLID BED POLYMERIZATION OF MONOMERS
DE3736316A1 (en) *	1987-10-27	1989-05-11	Loedige Maschbau Gmbh Geb	REACTOR FOR TREATING Bulk goods or the like
JP2857916B2 (en) *	1990-07-20	1999-02-17	日本石油化学株式会社	Catalyst supply method for gas-phase polymerization fluidized bed
DE10014046A1 (en)	2000-03-23	2001-09-27	Basell Polypropylen Gmbh	Chemical compound, process for its preparation and its use in catalyst systems for the production of polyolefins
DE10016625A1 (en) *	2000-04-04	2001-10-11	Basell Polyolefine Gmbh	Gas phase polymerization process with direct cooling system
ATE464329T1 (en)	2001-11-19	2010-04-15	Ineos Europe Ltd	POLYMERIZATION CONTROL METHOD
JP5308797B2 (en)	2007-12-11	2013-10-09	住友化学株式会社	Olefin polymerization reaction apparatus, polyolefin production system, and polyolefin production method
JP5249730B2 (en)	2007-12-11	2013-07-31	住友化学株式会社	Olefin polymerization reaction apparatus and polyolefin production method
JP5308795B2 (en)	2007-12-11	2013-10-09	住友化学株式会社	Polyolefin production method and polyolefin production system provided with spouted bed apparatus
JP5427396B2 (en)	2007-12-11	2014-02-26	住友化学株式会社	Powder transfer apparatus and polyolefin production method
JP5308794B2 (en)	2007-12-11	2013-10-09	住友化学株式会社	Polyolefin production method using spouted bed apparatus
US7799866B2 (en)	2007-12-28	2010-09-21	Sumitomo Chemical Company, Limited	Method for producing propylene-ethylene block copolymer
CN102203140B (en) *	2008-08-21	2014-07-02	陶氏环球技术有限责任公司	High melt flow propylene impact copolymer and method
EP2344551B1 (en)	2008-09-25	2014-05-28	Basell Polyolefine GmbH	Impact resistant lldpe composition and films made thereof
KR20110061584A (en)	2008-09-25	2011-06-09	바젤 폴리올레핀 게엠베하	Impact resistant lldpe composition and films made thereof
CN102325798A (en) *	2009-02-20	2012-01-18	伊内奥斯美国公司	Broadening the molecular weight distribution of polyolefins materials made in a horizontal stirred gas phase reactor
JP5545800B2 (en)	2009-06-08	2014-07-09	住友化学株式会社	Jet-fluidized bed type olefin polymerization reactor, polyolefin production system, and polyolefin production method
WO2014048892A1 (en)	2012-09-28	2014-04-03	Ineos Europe Ag	Method for production of polymer
EP2909241B2 (en)	2012-10-16	2019-08-21	Ineos Europe AG	Process for the production of a polymer in a gas phase fluidised bed reactor
JP6902337B2 (en)	2016-08-03	2021-07-14	住友化学株式会社	Method for producing heterophasic propylene polymerized material

1975
- 1975-12-12 IN IN2332/CAL/75A patent/IN145649B/en unknown
- 1975-12-12 NO NO754245A patent/NO144570C/en unknown
- 1975-12-15 DE DE2556418A patent/DE2556418C2/en not_active Expired
- 1975-12-16 JP JP50150080A patent/JPS5921321B2/en not_active Expired
- 1975-12-16 FR FR7538557A patent/FR2335526A1/en active Granted
- 1975-12-16 GB GB51470/75A patent/GB1525978A/en not_active Expired
- 1975-12-16 BR BR7508335*A patent/BR7508335A/en unknown
- 1975-12-16 NL NLAANVRAGE7514637,A patent/NL183891C/en not_active IP Right Cessation
- 1975-12-16 IT IT52725/75A patent/IT1052588B/en active
- 1975-12-16 DD DD190200A patent/DD124882A5/xx unknown
- 1975-12-16 ES ES443515A patent/ES443515A1/en not_active Expired
- 1975-12-16 AR AR261638A patent/AR219479A1/en active
- 1975-12-16 AT AT956475A patent/AT351254B/en not_active IP Right Cessation

Also Published As

Publication number	Publication date
IT1052588B (en)	1981-07-20
NL183891B (en)	1988-09-16
AR219479A1 (en)	1980-08-29
FR2335526A1 (en)	1977-07-15
NO144570B (en)	1981-06-15
NL183891C (en)	1989-02-16
DD124882A5 (en)	1977-03-16
FR2335526B1 (en)	1979-07-27
DE2556418C2 (en)	1985-01-03
BR7508335A (en)	1976-08-24
GB1525978A (en)	1978-09-27
DE2556418A1 (en)	1976-06-24
AT351254B (en)	1979-07-10
NO144570C (en)	1981-09-23
ATA956475A (en)	1978-12-15
NL7514637A (en)	1976-06-18
JPS5921321B2 (en)	1984-05-19
IN145649B (en)	1985-01-05
JPS5186584A (en)	1976-07-29
ES443515A1 (en)	1977-08-01

Publication	Publication Date	Title
FR2335526B1 (en)	1979-07-27
DK135808C (en)	1977-11-28
FR2262648A1 (en)	1975-09-26
JPS50124910A (en)	1975-10-01
FR2286273B1 (en)	1982-08-27
AU7459374A (en)	1976-04-29
JPS50141062U (en)	1975-11-20
AU495028B2 (en)	1977-04-21
HU169943B (en)	1977-02-28
JPS50115221U (en)	1975-09-19
JPS50125899A (en)	1975-10-03
CH570727A5 (en)	1975-12-15
BG22275A1 (en)	1977-02-20
CH572750A5 (en)	1976-02-27
DD115980A1 (en)	1975-10-20
CH570729A5 (en)	1975-12-15
CH571443A5 (en)	1976-01-15
BG27078A3 (en)	1979-08-15
DD109462A1 (en)	1974-11-05
BG26512A3 (en)	1979-04-12
CH573533A5 (en)	1976-03-15
CH570920A5 (en)	1975-12-31
BG27063A3 (en)	1979-08-15
CH572167A5 (en)	1976-01-30
BG26511A3 (en)	1979-04-12