PH26350A - Improvements in fluidized bed polymerization reactors - Google Patents
Improvements in fluidized bed polymerization reactors Download PDFInfo
- Publication number
- PH26350A PH26350A PH32689A PH32689A PH26350A PH 26350 A PH26350 A PH 26350A PH 32689 A PH32689 A PH 32689A PH 32689 A PH32689 A PH 32689A PH 26350 A PH26350 A PH 26350A
- Authority
- PH
- Philippines
- Prior art keywords
- mixing chamber
- fluid
- reactor
- fluidized bed
- distributor plate
- Prior art date
Links
- 238000006116 polymerization reaction Methods 0.000 title claims description 27
- 239000012530 fluid Substances 0.000 claims description 80
- 239000007789 gas Substances 0.000 claims description 80
- 238000002156 mixing Methods 0.000 claims description 80
- 239000007787 solid Substances 0.000 claims description 75
- 239000002245 particle Substances 0.000 claims description 54
- 239000007788 liquid Substances 0.000 claims description 46
- 229920000642 polymer Polymers 0.000 claims description 32
- 239000003054 catalyst Substances 0.000 claims description 24
- 238000009826 distribution Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000035508 accumulation Effects 0.000 claims description 7
- 238000009825 accumulation Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 229940020445 flector Drugs 0.000 claims description 2
- 239000002685 polymerization catalyst Substances 0.000 claims 1
- 239000000047 product Substances 0.000 description 34
- 238000006243 chemical reaction Methods 0.000 description 23
- 208000028659 discharge Diseases 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 16
- 229920005989 resin Polymers 0.000 description 14
- 239000011347 resin Substances 0.000 description 14
- 238000012546 transfer Methods 0.000 description 12
- 239000000203 mixture Substances 0.000 description 11
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 7
- 239000005977 Ethylene Substances 0.000 description 7
- 239000000178 monomer Substances 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- -1 e. g. Polymers 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 5
- 238000005243 fluidization Methods 0.000 description 5
- 229940090044 injection Drugs 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 238000013022 venting Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 2
- 230000002844 continuous effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 235000000396 iron Nutrition 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical class CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 1
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 1
- 102100024482 Cell division cycle-associated protein 4 Human genes 0.000 description 1
- 101000980898 Homo sapiens Cell division cycle-associated protein 4 Proteins 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 235000013844 butane Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- 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
- B01J8/1818—Feeding of the fluidising gas
- B01J8/1827—Feeding of the fluidising gas the fluidising gas being a reactant
-
- 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
-
- 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
- B01J8/44—Fluidisation grids
-
- 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
- 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
- B01J2208/00106—Controlling the temperature by indirect heat exchange
- B01J2208/00265—Part of all of the reactants being heated or cooled outside the reactor while recycling
- B01J2208/00274—Part of all of the reactants being heated or cooled outside the reactor while recycling involving reactant vapours
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Polymerisation Methods In General (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US64388284A | 1984-08-24 | 1984-08-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PH26350A true PH26350A (en) | 1992-04-29 |
Family
ID=24582556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PH32689A PH26350A (en) | 1984-08-24 | 1985-08-23 | Improvements in fluidized bed polymerization reactors |
Country Status (27)
| Country | Link |
|---|---|
| EP (1) | EP0173261B1 (fr) |
| JP (1) | JPH0826086B2 (fr) |
| KR (1) | KR910005665B1 (fr) |
| AR (1) | AR240660A1 (fr) |
| AT (1) | ATE67689T1 (fr) |
| AU (1) | AU585246B2 (fr) |
| BR (1) | BR8504052A (fr) |
| CA (1) | CA1241525A (fr) |
| CS (1) | CS264120B2 (fr) |
| DE (1) | DE3584207D1 (fr) |
| DK (1) | DK168632B1 (fr) |
| EG (1) | EG16976A (fr) |
| ES (3) | ES8706472A1 (fr) |
| FI (1) | FI85497C (fr) |
| GR (1) | GR852049B (fr) |
| HU (1) | HU203683B (fr) |
| IE (1) | IE852074L (fr) |
| IL (1) | IL76160A (fr) |
| IN (1) | IN165875B (fr) |
| MX (1) | MX173123B (fr) |
| MY (1) | MY102501A (fr) |
| NO (1) | NO166285C (fr) |
| NZ (1) | NZ213208A (fr) |
| PH (1) | PH26350A (fr) |
| PL (1) | PL255137A1 (fr) |
| TR (1) | TR22892A (fr) |
| ZA (1) | ZA856440B (fr) |
Families Citing this family (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1241525A (fr) * | 1984-08-24 | 1988-09-06 | Larry L. Simpson | Reacteurs de polymerisation a lit fluidise |
| GB8430514D0 (en) * | 1984-12-04 | 1985-01-09 | Smidth & Co As F L | Tube mill |
| FR2599991B1 (fr) * | 1986-06-16 | 1993-04-02 | Bp Chimie Sa | Evacuation de produits presents dans un reacteur de polymerisation d'alpha-olefines en lit fluidise |
| US5171541A (en) * | 1986-06-16 | 1992-12-15 | Bp Chemicals Limited | Fluidized bed discharge process |
| JP2703813B2 (ja) * | 1989-11-13 | 1998-01-26 | 昭和電工株式会社 | 流動層型気相重合装置のガス分散板 |
| US6001938A (en) * | 1993-05-20 | 1999-12-14 | Bp Chemicals Limited | Polymerization process |
| ZA943399B (en) * | 1993-05-20 | 1995-11-17 | Bp Chem Int Ltd | Polymerisation process |
| GB9524038D0 (en) * | 1995-11-23 | 1996-01-24 | Bp Chem Int Ltd | Nozzle |
| EP0803519A1 (fr) | 1996-04-26 | 1997-10-29 | Bp Chemicals S.N.C. | Procédé de polymérisation |
| EP0824116A1 (fr) | 1996-08-13 | 1998-02-18 | Bp Chemicals S.N.C. | Procédé de polymérisation |
| EP0824115A1 (fr) * | 1996-08-13 | 1998-02-18 | Bp Chemicals S.N.C. | Procédé de polymérisation |
| GB9622715D0 (en) | 1996-10-31 | 1997-01-08 | Bp Chem Int Ltd | Nozzle |
| US6113862A (en) * | 1997-04-23 | 2000-09-05 | Union Carbide Chemicals & Plastics Technology Corporation | Fluidized bed polymerization reactor with multiple fluidization grids |
| US6117399A (en) * | 1997-04-23 | 2000-09-12 | Union Carbide Chemicals & Plastics Technology Corporation | Fluidized bed polymerization reactor with multiple fluidization grids |
| EP1082350B1 (fr) * | 1998-05-28 | 2003-05-07 | BP Chemicals Limited | Procede de detection avancee de l'encrassage d'un reacteur dans un processus de polymerisation en phase gazeuse |
| DE19825589A1 (de) | 1998-06-09 | 1999-12-16 | Elenac Gmbh | Gasphasenwirbelschichtreaktor |
| US6306981B1 (en) | 1999-04-02 | 2001-10-23 | Union Carbide Chemicals & Plastics Technology Corporation | Gas phase polymerization process |
| NL1015200C2 (nl) * | 2000-05-15 | 2001-11-19 | Dsm Nv | Werkwijze voor het in de gasfase polymeriseren van olefine monomeren. |
| EP1257352B1 (fr) | 2000-02-18 | 2009-04-22 | Niro A/S | Procédé et appareil de séchage d'un materiau pulverulent ou particulaire |
| US6958376B2 (en) * | 2002-10-24 | 2005-10-25 | Exxonmobil Chemical Patents Inc. | Inlet distribution device for upflow polymerization reactors |
| US7270791B2 (en) * | 2004-05-17 | 2007-09-18 | Univation Technologies, Llc | Angular flow distribution bottom head |
| WO2008074632A1 (fr) * | 2006-12-20 | 2008-06-26 | Basell Poliolefine Italia S.R.L. | Grille de distribution de gaz pour un appareil de polymérisation |
| EP2402376A1 (fr) | 2010-06-29 | 2012-01-04 | Borealis AG | Procédé de production d'un catalyseur prépolymérisé, ledit catalyseur prépolymérisé et son utilisation pour produire un polymère |
| KR101336302B1 (ko) * | 2010-10-04 | 2013-12-02 | 주식회사 엘지화학 | 트리클로로실란 제조용 유동층 반응장치 |
| CN102553495B (zh) * | 2010-12-16 | 2013-12-25 | 攀钢集团钢铁钒钛股份有限公司 | 一种流化床反应器及用于流化床反应器的气体分布板 |
| CN102553496B (zh) * | 2012-01-17 | 2014-06-18 | 洛阳康润石油化工科技开发有限公司 | 一种试验用固定流化床反应器 |
| CA3116516C (fr) | 2012-06-15 | 2023-08-29 | General Electric Company | Aube de turbine avec circuit de refroidissement de plate-forme moulee |
| CA2891185C (fr) * | 2012-11-09 | 2021-11-09 | University Of Ontario Institute Of Technology | Systemes, procedes et dispositifs pour la capture et l'hydrogenation de dioxyde de carbone avec des cycles thermochimiques cu-cl et mg-cl-na/k-co2 |
| EP2743278A1 (fr) * | 2012-12-11 | 2014-06-18 | Basell Polyolefine GmbH | Procédé de dégazage et de tamponnage de particules de polyoléfine obtenues par polymérisation d'oléfines |
| CN105170038B (zh) * | 2015-06-12 | 2017-06-30 | 四川省明信投资有限公司 | 一种用于连续流化床反应器的熔融物收集槽 |
| KR20180034062A (ko) * | 2016-09-27 | 2018-04-04 | 롯데케미칼 주식회사 | 비말동반 현상 방지를 위한 분리 장치 |
| US11053589B2 (en) * | 2017-06-28 | 2021-07-06 | X-Energy, Llc | Multi-inlet gas distributor for chemical vapor deposition coating of TRISO particles |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2690962A (en) * | 1952-10-06 | 1954-10-05 | Standard Oil Dev Co | Vessel for contacting gaseous fluids and solids |
| US2876079A (en) * | 1956-03-07 | 1959-03-03 | Exxon Research Engineering Co | Gas distributing arrangement for fluidized solids vessels |
| GB1402543A (en) * | 1971-06-21 | 1975-08-13 | Boland K M V | Methods for passing gases through discrete solids and through liquids |
| DZ520A1 (fr) * | 1982-03-24 | 2004-09-13 | Union Carbide Corp | Procédé perfectionné pour accroitre le rendement espace temps d'une réaction de polymérisation exothermique en lit fluidisé. |
| CA1241525A (fr) * | 1984-08-24 | 1988-09-06 | Larry L. Simpson | Reacteurs de polymerisation a lit fluidise |
-
1985
- 1985-08-16 CA CA000488902A patent/CA1241525A/fr not_active Expired
- 1985-08-22 AU AU46542/85A patent/AU585246B2/en not_active Expired
- 1985-08-22 EG EG534/85A patent/EG16976A/xx active
- 1985-08-22 IL IL76160A patent/IL76160A/xx unknown
- 1985-08-22 FI FI853225A patent/FI85497C/fi not_active IP Right Cessation
- 1985-08-23 AT AT85110605T patent/ATE67689T1/de not_active IP Right Cessation
- 1985-08-23 CS CS856082A patent/CS264120B2/cs not_active IP Right Cessation
- 1985-08-23 ES ES546371A patent/ES8706472A1/es not_active Expired
- 1985-08-23 NZ NZ213208A patent/NZ213208A/xx unknown
- 1985-08-23 MX MX206413A patent/MX173123B/es unknown
- 1985-08-23 IE IE852074A patent/IE852074L/xx unknown
- 1985-08-23 NO NO853333A patent/NO166285C/no not_active IP Right Cessation
- 1985-08-23 PH PH32689A patent/PH26350A/en unknown
- 1985-08-23 GR GR852049A patent/GR852049B/el unknown
- 1985-08-23 HU HU853220A patent/HU203683B/hu not_active IP Right Cessation
- 1985-08-23 DK DK385385A patent/DK168632B1/da not_active IP Right Cessation
- 1985-08-23 EP EP85110605A patent/EP0173261B1/fr not_active Expired - Lifetime
- 1985-08-23 IN IN659/MAS/85A patent/IN165875B/en unknown
- 1985-08-23 DE DE8585110605T patent/DE3584207D1/de not_active Expired - Lifetime
- 1985-08-23 ZA ZA856440A patent/ZA856440B/xx unknown
- 1985-08-23 KR KR1019850006099A patent/KR910005665B1/ko not_active IP Right Cessation
- 1985-08-23 BR BR8504052A patent/BR8504052A/pt not_active IP Right Cessation
- 1985-08-23 AR AR30137885A patent/AR240660A1/es active
- 1985-08-23 JP JP60184358A patent/JPH0826086B2/ja not_active Expired - Lifetime
- 1985-08-24 PL PL25513785A patent/PL255137A1/xx unknown
- 1985-09-02 TR TR36825A patent/TR22892A/xx unknown
-
1986
- 1986-04-09 ES ES553812A patent/ES8706475A1/es not_active Expired
-
1987
- 1987-03-16 ES ES557446A patent/ES8801678A1/es not_active Expired
- 1987-10-08 MY MYPI87002867A patent/MY102501A/en unknown
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