FI82669C - Förfarande för framställning av väteperoxid - Google Patents
Förfarande för framställning av väteperoxid Download PDFInfo
- Publication number
- FI82669C FI82669C FI890428A FI890428A FI82669C FI 82669 C FI82669 C FI 82669C FI 890428 A FI890428 A FI 890428A FI 890428 A FI890428 A FI 890428A FI 82669 C FI82669 C FI 82669C
- Authority
- FI
- Finland
- Prior art keywords
- hydrogen
- catalyst
- static
- hydrogenation
- working solution
- Prior art date
Links
- 239000012224 working solution Substances 0.000 claims description 33
- 239000003054 catalyst Substances 0.000 claims description 32
- 239000001257 hydrogen Substances 0.000 claims description 26
- 229910052739 hydrogen Inorganic materials 0.000 claims description 26
- 238000005984 hydrogenation reaction Methods 0.000 claims description 24
- 230000003068 static effect Effects 0.000 claims description 24
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 23
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 17
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 239000011541 reaction mixture Substances 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 229910052763 palladium Inorganic materials 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 4
- 239000011949 solid catalyst Substances 0.000 claims description 4
- RZVHIXYEVGDQDX-UHFFFAOYSA-N 9,10-anthraquinone Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1 RZVHIXYEVGDQDX-UHFFFAOYSA-N 0.000 claims description 3
- 239000003960 organic solvent Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 229910052703 rhodium Inorganic materials 0.000 claims description 2
- 239000010948 rhodium Substances 0.000 claims description 2
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 2
- 238000009903 catalytic hydrogenation reaction Methods 0.000 claims 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 9
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 8
- 150000004056 anthraquinones Chemical class 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 239000008188 pellet Substances 0.000 description 5
- 150000002431 hydrogen Chemical class 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000007086 side reaction Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- SJEBAWHUJDUKQK-UHFFFAOYSA-N 2-ethylanthraquinone Chemical compound C1=CC=C2C(=O)C3=CC(CC)=CC=C3C(=O)C2=C1 SJEBAWHUJDUKQK-UHFFFAOYSA-N 0.000 description 1
- PCFMUWBCZZUMRX-UHFFFAOYSA-N 9,10-Dihydroxyanthracene Chemical class C1=CC=C2C(O)=C(C=CC=C3)C3=C(O)C2=C1 PCFMUWBCZZUMRX-UHFFFAOYSA-N 0.000 description 1
- 239000007868 Raney catalyst Substances 0.000 description 1
- 229910000564 Raney nickel Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 150000002903 organophosphorus compounds Chemical class 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003053 toxin Substances 0.000 description 1
- 231100000765 toxin Toxicity 0.000 description 1
- 108700012359 toxins Proteins 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B15/00—Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides
- C01B15/01—Hydrogen peroxide
- C01B15/022—Preparation from organic compounds
- C01B15/023—Preparation from organic compounds by the alkyl-anthraquinone process
-
- 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
- B01J19/24—Stationary reactors without moving elements inside
- B01J19/2415—Tubular reactors
- B01J19/2435—Loop-type reactors
-
- 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
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
- B01J2219/00094—Jackets
-
- 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
-
- 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
-
- 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
- B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
- B01J2219/324—Composition or microstructure of the elements
- B01J2219/32466—Composition or microstructure of the elements comprising catalytically active material
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Claims (9)
1. Förfarande för framställning av väteperoxid medelet antrakinonförfarandet genom recirkulering av en reaktions-blandning vartill mataa väte eller vätehaltig gaa (12) och arbetaloaning (14) dva. antrakinonderivat i organiekt löa-nmgamedel, via en enhetlig eller av flera delar beatäende längeträckt, atatiak blandningazon (2) för hydrering av antra-kinonderivatet i närvaro av en faat katalyaator och avläge-ning frän den cirkulerande reaktionablandningen hydrerad ar-betalöaning (13) och gaa (11), kännetecknat av att reak-tionablandningen (Θ) omrörea och katalyaerae aamtidigt genom att recirkulera denaamma via en atatiak blandmngezon (2, 9> aom belagta med katalyaator.
2. Förfarande enligt patentkravet 1, kännetecknat av att i den katalyaatorbelagda atatiaka omrörningazonen <2, 9) upprätthälle ett tryck aom är 1-15 bar, lämpligen 2-5 bar, och o o en temperatur aom är under 100 C, lämpligen 40-60 C.
3. Förfarande enligt patentkravet. 1 eller 2, kännetecknat av att reaktionablandningen (8) recirkulerae genom den katalyaatorbelagda atatiaka blandningazonen (2, 9) med en haatighet pä 0,1-1,5 m/e.
4. Rörformig, atatiak omrörare (9) beatäende av en eller flera delar för katalytiak hydrering av en reaktioneblandning inneh&llande väte eller vätehaltig gaa (12) och arbetalöanxng dva. antrakinonderivat i organiek löeningemedel, känneteck-nad av att den atatiaka omrörare (9> är belagd med en faat katalyaator.
5. Statiak omrörare enligt patentkravet 4, kännetecknad av att den belagda med ett poröat bärarmaterial, i vilken me-tallen aom katalyaerar hydreringen impregnerat.a . 12 82669
6. Statisk omrorare enligt patentkravet 5, kännetecknad av att beläggningens tjocklek ar hogat cirka 300 /um, och lampiigen minet 5 ^urn.
7. Statiak omrorare enligt patentkravet 5 eller 6, kännetecknad av att det porösa bärarmaterialet är aktivt alurtii-niumoxid, kiaeldioxid, ailikat och/eller aktiv koi.
8. Statiak omrorare enligt nägot av patentkraven 4-7, kännetecknad av att omröraren <9) impregnerats med palladium, platina, rodium och/eller nickel aom katalyaerar hydre-r ingen.
9. Användning av en rörformig, av en eller flera delar beetäende statiak omrörare <9> för katalytiek hydrering av ett antrakinonderivat ι organiekt lösningsmedel medelet vate el]er vätehaltig gae, vara yta belagte med ett poröet bärarmateria1 eom har en tjocklek pA lämpligen höget cirka 300 ^um och eom impregnerate med en metall eom katalyeerar hydreringen.
Priority Applications (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI890428A FI82669C (sv) | 1989-01-27 | 1989-01-27 | Förfarande för framställning av väteperoxid |
| SE9000227A SE504578C2 (sv) | 1989-01-27 | 1990-01-23 | Rörformig statisk blandare samt användning av denna vid ett förfarande för framställning av väteperoxid genom antrakinonprocessen |
| AU48660/90A AU620963B2 (en) | 1989-01-27 | 1990-01-23 | A process for the preparation of hydrogen peroxide (i) |
| NZ232216A NZ232216A (en) | 1989-01-27 | 1990-01-24 | Process for the preparation of hydrogen peroxide by anthraquinone process |
| JP2015146A JPH02275703A (ja) | 1989-01-27 | 1990-01-26 | 反応と混合を同時に行なう過酸化水素の製造方法 |
| BR909000347A BR9000347A (pt) | 1989-01-27 | 1990-01-26 | Processo para a producao de peroxido de hidrogenio e misturador estatico tubular |
| DE4002335A DE4002335A1 (de) | 1989-01-27 | 1990-01-26 | Verfahren zur herstellung von wasserstoffperoxid |
| ES909000488A ES2019046A6 (es) | 1989-01-27 | 1990-01-26 | Proceso para la preparacion de peroxido de hidrogeno. |
| GB9001802A GB2229173B (en) | 1989-01-27 | 1990-01-26 | A process for the preparation of hydrogen peroxide |
| CA002008651A CA2008651A1 (en) | 1989-01-27 | 1990-01-26 | Process for the preparation of hydrogen peroxide (i) |
| IT83314A IT1240869B (it) | 1989-01-27 | 1990-01-26 | Processo per la produzione di perossido di idrogeno (i) |
| FR909000986A FR2642412B1 (fr) | 1989-01-27 | 1990-01-29 | Procede pour la preparation de peroxyde d'hydrogene 1 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI890428A FI82669C (sv) | 1989-01-27 | 1989-01-27 | Förfarande för framställning av väteperoxid |
| FI890428 | 1989-01-27 |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| FI890428A0 FI890428A0 (fi) | 1989-01-27 |
| FI890428A FI890428A (fi) | 1990-07-28 |
| FI82669B FI82669B (fi) | 1990-12-31 |
| FI82669C true FI82669C (sv) | 1991-04-10 |
Family
ID=8527797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI890428A FI82669C (sv) | 1989-01-27 | 1989-01-27 | Förfarande för framställning av väteperoxid |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPH02275703A (sv) |
| AU (1) | AU620963B2 (sv) |
| BR (1) | BR9000347A (sv) |
| CA (1) | CA2008651A1 (sv) |
| DE (1) | DE4002335A1 (sv) |
| ES (1) | ES2019046A6 (sv) |
| FI (1) | FI82669C (sv) |
| FR (1) | FR2642412B1 (sv) |
| GB (1) | GB2229173B (sv) |
| IT (1) | IT1240869B (sv) |
| NZ (1) | NZ232216A (sv) |
| SE (1) | SE504578C2 (sv) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4313393C2 (de) * | 1993-04-07 | 2003-06-26 | Siemens Ag | Statischer Mischer |
| FI95457C (sv) * | 1994-03-15 | 1996-02-12 | Kemira Chemicals Oy | Förfarande för framställning av väteperoxid och reaktor användbar därför |
| AU2001265326A1 (en) * | 2000-06-07 | 2001-12-17 | Abb Lummus Global Inc. | Heat exchanger/reactor apparatus |
| JP2022538553A (ja) * | 2019-06-21 | 2022-09-05 | コモンウェルス サイエンティフィック アンド インダストリアル リサーチ オーガナイゼーション | 足場を触媒的にコーティングするためのプロセス |
| CN111410176A (zh) * | 2020-05-14 | 2020-07-14 | 福建永荣科技有限公司 | 一种生产过氧化氢的氢化塔管式反应器 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL139013B (nl) * | 1965-12-04 | 1973-06-15 | Degussa | Werkwijze voor het bereiden van waterstofperoxyde volgens het antrachinonkringloopprocede. |
| US3565581A (en) * | 1968-05-16 | 1971-02-23 | Fmc Corp | Production of hydrogen peroxide in the anthraquinone process using a novel catalytic fixed bed |
| US3615207A (en) * | 1969-06-16 | 1971-10-26 | Fmc Corp | Production of hydrogen peroxide by anthraquinone process |
| TR16751A (tr) * | 1969-07-12 | 1973-05-01 | Degussa | Hidrojenleme safhasinda kiymetil madenden tasiyici katalizatoerler kullanilarak hidrojenper oksit imali usulleri |
| JPS4941040B1 (sv) * | 1970-08-18 | 1974-11-06 | ||
| DE2042523C3 (de) * | 1970-08-27 | 1979-09-13 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt | Verfahren zum Regenerieren von Edelmetall-Katalysatoren für die Wasserstoffperoxidsynthese nach dem Anthrachinonverfahren |
| US3755552A (en) * | 1970-10-21 | 1973-08-28 | Fmc Corp | Process for producing hydrogen peroxide |
| US4428922A (en) * | 1982-05-14 | 1984-01-31 | Fmc Corporation | Process for manufacturing hydrogen peroxide |
| SE431532B (sv) * | 1982-09-08 | 1984-02-13 | Eka Ab | Forfarande vid framstellning av veteperoxid |
| FI77633B (fi) * | 1986-12-05 | 1988-12-30 | Kemira Oy | Foerfarande foer framstaellning av vaeteperoxid. |
-
1989
- 1989-01-27 FI FI890428A patent/FI82669C/sv not_active IP Right Cessation
-
1990
- 1990-01-23 AU AU48660/90A patent/AU620963B2/en not_active Ceased
- 1990-01-23 SE SE9000227A patent/SE504578C2/sv unknown
- 1990-01-24 NZ NZ232216A patent/NZ232216A/xx unknown
- 1990-01-26 DE DE4002335A patent/DE4002335A1/de not_active Withdrawn
- 1990-01-26 IT IT83314A patent/IT1240869B/it active IP Right Grant
- 1990-01-26 BR BR909000347A patent/BR9000347A/pt not_active Application Discontinuation
- 1990-01-26 JP JP2015146A patent/JPH02275703A/ja active Pending
- 1990-01-26 GB GB9001802A patent/GB2229173B/en not_active Expired - Fee Related
- 1990-01-26 ES ES909000488A patent/ES2019046A6/es not_active Expired - Fee Related
- 1990-01-26 CA CA002008651A patent/CA2008651A1/en not_active Abandoned
- 1990-01-29 FR FR909000986A patent/FR2642412B1/fr not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FR2642412B1 (fr) | 1992-11-13 |
| GB2229173A (en) | 1990-09-19 |
| FI890428A0 (fi) | 1989-01-27 |
| FR2642412A1 (fr) | 1990-08-03 |
| SE9000227L (sv) | 1990-07-28 |
| FI890428A (fi) | 1990-07-28 |
| CA2008651A1 (en) | 1990-07-27 |
| IT1240869B (it) | 1993-12-17 |
| DE4002335A1 (de) | 1990-09-06 |
| NZ232216A (en) | 1991-10-25 |
| FI82669B (fi) | 1990-12-31 |
| AU4866090A (en) | 1990-08-02 |
| JPH02275703A (ja) | 1990-11-09 |
| IT9083314A0 (it) | 1990-01-26 |
| AU620963B2 (en) | 1992-02-27 |
| SE9000227D0 (sv) | 1990-01-23 |
| IT9083314A1 (it) | 1990-07-28 |
| SE504578C2 (sv) | 1997-03-10 |
| BR9000347A (pt) | 1990-12-04 |
| GB9001802D0 (en) | 1990-03-28 |
| GB2229173B (en) | 1993-03-03 |
| ES2019046A6 (es) | 1991-05-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM | Patent lapsed |
Owner name: KEMIRA OY |