EP1283281A2 - Procédé de production électrochimique de chlore à partir de solutions aqueuses d'acide chlorhydrique - Google Patents

Procédé de production électrochimique de chlore à partir de solutions aqueuses d'acide chlorhydrique Download PDF

Info

Publication number: EP1283281A2
Authority: EP; European Patent Office
Prior art keywords: cathode; chamber; anode; pressure; oxygen
Prior art date: 2001-08-03
Legal status (The legal status 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 status listed.): Granted

Application number

EP02016239A

Other languages

German (de)

English (en)

Other versions

EP1283281A3 (fr

EP1283281B1 (fr

Inventor

Andreas Bulan

Fritz Dr. Gestermann

Hans-Dieter Pinter

Gerd Speer

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Bayer Intellectual Property GmbH

Original Assignee

Bayer AG

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.)

2001-08-03

Filing date

2002-07-22

Publication date

2003-02-12

2002-07-22 Application filed by Bayer AG filed Critical Bayer AG

2003-02-12 Publication of EP1283281A2 publication Critical patent/EP1283281A2/fr

2003-05-28 Publication of EP1283281A3 publication Critical patent/EP1283281A3/fr

2012-11-14 Application granted granted Critical

2012-11-14 Publication of EP1283281B1 publication Critical patent/EP1283281B1/fr

2022-07-22 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Images

Classifications

- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/24—Halogens or compounds thereof
- C25B1/26—Chlorine; Compounds thereof

Definitions

the invention relates to a method for the electrochemical production of chlorine from aqueous solutions of hydrogen chloride in an electrolytic cell.
Aqueous solutions of hydrogen chloride fall for example as By-products in the production of organic chlorine compounds by Chlorination with elemental chlorine. Many of these organic chlorine compounds are intermediates for the large-scale production of plastics.
the Any aqueous solutions of hydrogen chloride must be recycled be supplied. Preferably, the recovery takes place in such a way that from the aqueous solutions of hydrogen chloride again chlorine is produced, which then can be used for example for further chlorinations.
the conversion to chlorine can e.g. by electrolysis of the aqueous solutions of Hydrogen chloride take place on a gas diffusion cathode.
a corresponding Method is known from US-A-5 770 035.
the electrolysis is carried out according to US-A-5 770 035 in an electrolytic cell with an anode compartment, with a suitable Anode, e.g. a noble metal coated or doped titanium electrode, with the aqueous solution of hydrogen chloride is filled.
the one formed at the anode Chlorine escapes from the anode compartment and becomes suitable treatment fed.
the anode compartment is from a cathode compartment by a commercially available Cation exchange membrane separated.
On the cathode side is a gas diffusion electrode on the cation exchange membrane. Behind the gas diffusion electrode there is a power distributor.
In the cathode compartment is usually an oxygen-containing gas or pure oxygen introduced.
the anode compartment is maintained at a higher pressure than the cathode compartment.
the setting of the pressure can e.g. done by a liquid immersion, through which in the anode chamber formed chlorine gas is passed.
the US-A-5,770,035 known method has the drawback, that at high current densities, including in particular current densities greater than 4000 A / m 2 are understood to be formed on the gas diffusion cathode, a relatively high amount of hydrogen.
high current densities are necessary in the technical implementation of the method for economic reasons.
the object of the invention is to provide a method for electrochemical Production of chlorine from aqueous solutions of hydrogen chloride, using itself When working with high current densities, as little hydrogen as possible is formed and sets the lowest possible voltage.
the invention relates to a process for the electrochemical production of Chlorine from aqueous solutions of hydrogen chloride in an electrolytic cell, comprising at least one anode chamber and a cathode chamber, wherein the Anodenhunt through a cation exchange membrane of the cathode chamber is separated, the anode chamber an anode and the cathode chamber an oxygen-consuming cathode contains, and in the anode chamber, the aqueous solution of Hydrogen chloride and introduced into the cathode chamber, an oxygen-containing gas is, wherein the absolute pressure in the cathode chamber is at least 1.05 bar.
oxygen-containing gas for example, pure oxygen, a mixture of Oxygen and inert gases, in particular nitrogen, or air are used.
Preferred oxygen-containing gas is pure oxygen, in particular a purity used by at least 99 vol .-%.
the indication of the pressure in the cathode chamber are absolute values.
the pressure in the cathode chamber is preferably 1.05 to 1.5 bar, especially preferably 1.05 to 1.3 bar.
the adjustment of the pressure in the cathode chamber on the inventive Value of at least 1.05 bar can be done, for example, that the Cathode chamber supplied oxygen-containing gas through a pressure holding device is accumulated.
a suitable pressure holding device is for example a Fluid compression, through which the cathode space is shut off.
a throttling About valves also provides a suitable method for adjusting the Pressure in the cathode compartment.
the pressure in the anode chamber is 50 to 500 mbar, completely more preferably 200 to 500 mbar higher than the pressure in the cathode chamber.
the process according to the invention is preferably operated at a current density of at least 3500 A / m 2 , more preferably at a current density of at least 4000 A / m 2 , particularly preferably at a current density of at least 5000 A / m 2 .
the temperature of the supplied aqueous solution of hydrogen chloride is preferably 30 to 80 ° C, particularly preferably 50 to 70 ° C.
the concentration of hydrochloric acid in the electrolyzer in the Carrying out the process according to the invention 5 to 20 wt .-%, especially preferably 10 to 15 wt .-%.
the spent hydrochloric acid in the electrolyser can through a hydrochloric acid supplied to the electrolyzer in the concentration range of 8 to Be supplemented 36 wt .-%.
the oxygen-containing gas is preferably supplied in such an amount that Oxygen in excess of the theoretically required amount is present. Particularly preferred is a 1.2 to 1.5-fold excess of oxygen.
the process according to the invention is carried out in an electrochemical cell (electrolysis cell) performed, the anode compartment through a cation exchange membrane is separated from the cathode chamber, wherein the cathode chamber a Contains oxygen-consuming cathode.
the electrolysis cell used may, for example, the following components comprising: an anode in an anode chamber, a cation exchange membrane, which is hydrostatically pressed onto an oxygen-consuming cathode (SVK), which itself in turn supported on a cathode-side power distributor and so electrically is contacted, and a cathode-side gas space (cathode chamber).
SVK oxygen-consuming cathode
the aqueous solution of hydrogen chloride is introduced into the anode chamber, the oxygen-containing gas in the cathode chamber.
oxygen-consuming cathode is not critical. It can be the well-known and partially commercially available oxygen-consuming cathodes are used. Preferably, however, oxygen-consuming cathodes are used which have a Catalyst of the platinum group, preferably platinum or rhodium.
Suitable cation exchange membranes are those made of perfluoroethylene, which contain sulfonic acid groups as active centers. They are both Single-layer membranes containing sulfonic acid groups with equal equivalent weights on both sides have, as well as membranes, sulfonic acid groups on both sides with different equivalent weights are suitable. Also Membranes with carboxyl groups on the cathode side are conceivable.
Suitable anodes are, for example, titanium anodes, in particular with a acid-resistant, chlorine-evolving coating.
the cathode-side power distributor can be made of titanium expanded metal or made of precious metal coated titanium.
FIG. 1 A suitable electrolytic cell for carrying out the method according to the invention is shown schematically in Fig. 1.
the electrolysis cell 1 is divided by a cation exchange membrane 6 into a cathode chamber 2 with an oxygen-consuming cathode 5 and an anode chamber 3 with an anode 4 .
the oxygen-consuming cathode 5 is located on the cathode side on the cation exchange membrane 6 .
Behind the Sauerstoffverzehrkathode 5 is a power distributor. 7 Due to the higher pressure in the anode chamber 3 , the cation exchange membrane 6 is pressed onto the oxygen-consuming cathode 5 and this in turn onto the current distributor 7 . In this way, the Sauerstoffverzehrkathode 5 is sufficiently electrically contacted and supplied with power.
the adjustment of the pressure in the cathode chamber 2 and anode chamber 3 is in each case via a pressure maintenance 8 via an HCl inlet 12 , an aqueous solution of hydrogen chloride is introduced into the anode chamber 3 , which forms at the anode 4 chlorine, which flows through the pressure maintenance 8 and is discharged from the anode chamber 3 via the Cl 2 outlet 13 .
oxygen-containing gas is introduced into the cathode chamber 2 , where it reacts with the oxygen-consuming cathode 5 to form water with protons which diffuse out of the anode chamber 3 into the oxygen-consuming cathode 5 .
the water formed is removed together with the excess oxygen-containing gas via the pressure maintenance 8 from the cathode chamber 2 , wherein the water formed via a H 2 O outlet 11 and the oxygen-containing gas via an O 2 outlet 10 is removed. It is also possible that the oxygen supply is from below and / or that the removal of water formed and oxygen-containing gas is carried out separately via a separate pressure maintenance.
the electrolysis was carried out in an electrolysis cell 1 divided into a cathode chamber 2 and an anode chamber 3 , as shown schematically in FIG. 1 and explained in greater detail above.
An activated titanium anode with a size of 10 cm ⁇ 10 cm was used as anode 4 .
the anode chamber 3 was supplied with an aqueous solution of hydrogen chloride.
the temperature of the aqueous solution of hydrogen chloride was 60 ° C, the concentration 12-15 wt .-%.
a gas diffusion electrode of the company E-TEK, type ELAT which was directly on a power distributor 7 in the form of an activated expanded titanium metal.
Cathode chamber 2 and anode chamber 3 were separated from a cation exchange membrane 6 from DuPont, type Nafion® 324.
pure oxygen having a content of greater than 99 vol .-% was introduced at a temperature of 20 ° C.
the electrolysis was at a pressure in the anode chamber 3 of 1 , 4 bar, abs. and a pressure in the cathode chamber 2 of 1 bar, abs., A voltage of 1.67 V and a current density of 6000 A / m 2 operated.
the excess oxygen-containing gas was removed from the cathode chamber 2 together with the water formed.
the concentration of hydrogen in this gas was determined by gas chromatography. The hydrogen concentration was 700 ppm after an electrolysis time of 10 minutes, increased steadily during the electrolysis and was 1600 ppm after an electrolysis time of 3 hours.
Example 1 An electrolysis of an aqueous solution of hydrogen chloride was carried out as described in Example 1.
the pressure in the anode chamber 3 was 1.4 bar, abs.,
the pressure in the cathode chamber 2 1 bar, abs.,
the voltage 1.82 V and the current density 7000 A / m 2 were measured.

Landscapes

Chemical & Material Sciences (AREA)
Inorganic Chemistry (AREA)
Engineering & Computer Science (AREA)
Chemical Kinetics & Catalysis (AREA)
Electrochemistry (AREA)
Materials Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

EP02016239A 2001-08-03 2002-07-22 Procédé de production électrochimique de chlore à partir de solutions aqueuses d'acide chlorhydrique Expired - Lifetime EP1283281B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE10138215		2001-08-03
DE10138215A DE10138215A1 (de)	2001-08-03	2001-08-03	Verfahren zur elektrochemischen Herstellung von Chlor aus wässrigen Lösungen von Chlorwasserstoff

Publications (3)

Publication Number	Publication Date
EP1283281A2 true EP1283281A2 (fr)	2003-02-12
EP1283281A3 EP1283281A3 (fr)	2003-05-28
EP1283281B1 EP1283281B1 (fr)	2012-11-14

Family

ID=7694329

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP02016239A Expired - Lifetime EP1283281B1 (fr)	2001-08-03	2002-07-22	Procédé de production électrochimique de chlore à partir de solutions aqueuses d'acide chlorhydrique

Country Status (7)

Country	Link
US (1)	US6790339B2 (fr)
EP (1)	EP1283281B1 (fr)
CN (1)	CN1247818C (fr)
DE (1)	DE10138215A1 (fr)
ES (1)	ES2397508T3 (fr)
HK (1)	HK1054575A1 (fr)
PT (1)	PT1283281E (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CA2445578C (fr)	2001-04-27	2012-08-28	Johns Hopkins University	Stimulateur cardiaque biologique comprenant une dominante negative de kir2.1aaa
DE10152275A1 (de) *	2001-10-23	2003-04-30	Bayer Ag	Verfahren zur Elektrolyse von wässrigen Lösungen aus Chlorwasserstoff
CN101220482B (zh) *	2002-11-27	2011-02-09	旭化成化学株式会社	复极式零间距电解池
DE10342148A1 (de)	2003-09-12	2005-04-07	Bayer Materialscience Ag	Verfahren zur Elektrolyse einer wässrigen Lösung von Chlorwasserstoff oder Alkalichlorid
DE102006023261A1 (de)	2006-05-18	2007-11-22	Bayer Materialscience Ag	Verfahren zur Herstellung von Chlor aus Chlorwasserstoff und Sauerstoff
JP5041769B2 (ja) *	2006-09-06	2012-10-03	住友化学株式会社	スタートアップ方法
DE102008015901A1 (de) *	2008-03-27	2009-10-01	Bayer Technology Services Gmbh	Elektrolysezelle zur Chlorwasserstoffelektrolyse
WO2010119918A1 (fr)	2009-04-16	2010-10-21	クロリンエンジニアズ株式会社	Procédé d'électrolyse utilisant une cellule électrolytique à chlorure de sodium à membrane d'échange d'ions à deux chambres équipée d'une électrode de diffusion à gaz
DE102009023539B4 (de) *	2009-05-30	2012-07-19	Bayer Materialscience Aktiengesellschaft	Verfahren und Vorrichtung zur Elektrolyse einer wässerigen Lösung von Chlorwasserstoff oder Alkalichlorid in einer Elektrolysezelle
EP2371806B1 (fr)	2010-03-30	2017-07-12	Covestro Deutschland AG	Procédé de fabrication de diarylcarbonates et de polycarbonates
US9175135B2 (en)	2010-03-30	2015-11-03	Bayer Materialscience Ag	Process for preparing diaryl carbonates and polycarbonates
US8562810B2 (en)	2011-07-26	2013-10-22	Ecolab Usa Inc.	On site generation of alkalinity boost for ware washing applications
CN103194765A (zh) *	2012-01-10	2013-07-10	石福金属兴业株式会社	杀菌水生成装置
EA027954B1 (ru) *	2012-06-29	2017-09-29	Острелиан Байорифайнинг Пти Лтд.	Способ и устройство для генерации или восстановления соляной кислоты из растворов солей металлов

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS534796A (en) *	1976-07-05	1978-01-17	Asahi Chem Ind Co Ltd	Electrolysis of pressurized alkali halide
US4311568A (en) *	1980-04-02	1982-01-19	General Electric Co.	Anode for reducing oxygen generation in the electrolysis of hydrogen chloride
IT1282367B1 (it) *	1996-01-19	1998-03-20	De Nora Spa	Migliorato metodo per l'elettrolisi di soluzioni acquose di acido cloridrico
US6149782A (en) *	1999-05-27	2000-11-21	De Nora S.P.A	Rhodium electrocatalyst and method of preparation
US6135331A (en) *	1999-08-13	2000-10-24	Davis; Richard Maurice	Snow ski boot remover

2001
- 2001-08-03 DE DE10138215A patent/DE10138215A1/de not_active Withdrawn
2002
- 2002-07-22 EP EP02016239A patent/EP1283281B1/fr not_active Expired - Lifetime
- 2002-07-22 ES ES02016239T patent/ES2397508T3/es not_active Expired - Lifetime
- 2002-07-22 PT PT2016239T patent/PT1283281E/pt unknown
- 2002-07-30 US US10/207,937 patent/US6790339B2/en not_active Expired - Lifetime
- 2002-08-02 CN CNB021274622A patent/CN1247818C/zh not_active Expired - Lifetime
2003
- 2003-09-18 HK HK03106703.2A patent/HK1054575A1/zh unknown

Also Published As

Publication number	Publication date
US20030024824A1 (en)	2003-02-06
HK1054575A1 (zh)	2003-12-05
EP1283281A3 (fr)	2003-05-28
JP4251432B2 (ja)	2009-04-08
JP2003049290A (ja)	2003-02-21
CN1247818C (zh)	2006-03-29
DE10138215A1 (de)	2003-02-20
CN1405357A (zh)	2003-03-26
PT1283281E (pt)	2013-01-24
EP1283281B1 (fr)	2012-11-14
ES2397508T3 (es)	2013-03-07
US6790339B2 (en)	2004-09-14

Publication	Publication Date	Title
EP0866890B1 (fr)	2000-02-09	Procede de synthese electrochimique directe de phosgene en phase gazeuse
DE69016459T2 (de)	1995-05-24	Elektrochemischer chlordioxidgenerator.
DE69215093T2 (de)	1997-06-12	Vorrichtung und Verfahren zur elektrochemischen Zersetzung von Salzlösungen um die entsprechenden Basen und Säuren zu bilden
EP0989206B1 (fr)	2002-11-13	Cellule d'électrolyse et son utilisation
EP1417356B1 (fr)	2005-01-12	Cellule electrolytique, destinee en particulier a la production electrochimique de chlore
EP1283281B1 (fr)	2012-11-14	Procédé de production électrochimique de chlore à partir de solutions aqueuses d'acide chlorhydrique
DE69229711T2 (de)	1999-12-02	Kathode für Elektrolysezelle
WO2009118162A1 (fr)	2009-10-01	Cellule d'électrolyse pour l'électrolyse de chlorure d'hydrogène
EP1463847B1 (fr)	2005-12-28	Electrode pour electrolyse dans des milieux acides
DD140262A5 (de)	1980-02-20	Verfahren zur kontinuierlichen herstellung von chlor
DE69508689T2 (de)	1999-09-30	Elektrode für elektrochemisches Verfahren und deren Verwendung
DE102017219974A1 (de)	2019-05-09	Herstellung und Abtrennung von Phosgen durch kombinierte CO2 und Chlorid-Elektrolyse
EP0008470B1 (fr)	1982-05-05	Procédé pour l'électrolyse de solutions aqueuses d'halogénure alcalin
DE3602683A1 (de)	1987-08-06	Verfahren zur durchfuehrung der hcl-membranelektrolyse
DE10152275A1 (de)	2003-04-30	Verfahren zur Elektrolyse von wässrigen Lösungen aus Chlorwasserstoff
WO2017174563A1 (fr)	2017-10-12	Électrode bifonctionnelle et dispositif d'électrolyse pour l'électrolyse de chlore-alcali
EP3597791B1 (fr)	2021-11-17	Procédé d'amélioration de la performance des électrodes à base de nickel
DD271722A5 (de)	1989-09-13	Elektrochemisches verfahren zur herstellung von fluorkohlenwasserstoffen
EP0141905B1 (fr)	1986-10-08	Procédé pour compenser par voie électrochimique l'oxydation par l'air dans la régénération électrochimique de solution de décapage de cuivre contenant du chlorure
DE102005027735A1 (de)	2006-12-21	Elektrochemische Zelle
EP0029083A1 (fr)	1981-05-27	Procédé de fabrication simultanée d'oxyde azotique et d'hydroxyde d'alcali par électrolyse à partir de solutions aqueuses de nitrite d'alcali
DE19625600B4 (de)	2013-10-17	Elektrolyseverfahren
EP1106714B1 (fr)	2005-03-16	Procédé de production d'halogènes par électrolyse en phase gazeuse
DE10138966A1 (de)	2003-02-20	Verfahren zum geschlossenen Recycling von Ammoniumsalzen zu Ammoniak und Säuren
DE1567718A1 (de)	1970-07-02	Elektrode fuer die elektrolytische Zerlegung von Salzsaeure und Verfahren zu ihrer Herstellung

Legal Events

Date	Code	Title	Description
2002-12-28	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
2003-02-12	AK	Designated contracting states	Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
2003-02-12	AX	Request for extension of the european patent	Extension state: AL LT LV MK RO SI
2003-04-15	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
2003-05-28	AK	Designated contracting states	Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
2003-05-28	AX	Request for extension of the european patent	Extension state: AL LT LV MK RO SI
2004-01-28	17P	Request for examination filed	Effective date: 20031128
2004-02-18	AKX	Designation fees paid	Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
2004-03-10	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: BAYER MATERIALSCIENCE AG
2010-08-18	17Q	First examination report despatched	Effective date: 20100714
2012-04-25	RTI1	Title (correction)	Free format text: PROCESS FOR THE ELECTROCHEMICAL PRODUCTION OF CHLORINE FROM AQUEOUS HYDROCHLORIC ACID SOLUTIONS
2012-05-08	GRAP	Despatch of communication of intention to grant a patent	Free format text: ORIGINAL CODE: EPIDOSNIGR1
2012-08-14	GRAS	Grant fee paid	Free format text: ORIGINAL CODE: EPIDOSNIGR3
2012-10-12	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
2012-11-14	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
2012-11-14	REG	Reference to a national code	Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH
2012-11-15	REG	Reference to a national code	Ref country code: AT Ref legal event code: REF Ref document number: 584067 Country of ref document: AT Kind code of ref document: T Effective date: 20121115 Ref country code: CH Ref legal event code: EP
2012-12-19	REG	Reference to a national code	Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN
2013-01-10	REG	Reference to a national code	Ref country code: DE Ref legal event code: R096 Ref document number: 50215645 Country of ref document: DE Effective date: 20130110
2013-01-24	REG	Reference to a national code	Ref country code: PT Ref legal event code: SC4A Free format text: AVAILABILITY OF NATIONAL TRANSLATION Effective date: 20130111
2013-02-27	REG	Reference to a national code	Ref country code: NL Ref legal event code: T3
2013-03-07	REG	Reference to a national code	Ref country code: ES Ref legal event code: FG2A Ref document number: 2397508 Country of ref document: ES Kind code of ref document: T3 Effective date: 20130307
2013-04-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20121114 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20121114
2013-05-29	RAP2	Party data changed (patent owner data changed or rights of a patent transferred)	Owner name: BAYER INTELLECTUAL PROPERTY GMBH
2013-05-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130215 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20121114
2013-07-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130214 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20121114 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20121114 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20121114 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20121114
2013-09-20	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
2013-09-20	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
2013-10-23	26N	No opposition filed	Effective date: 20130815
2013-12-12	REG	Reference to a national code	Ref country code: DE Ref legal event code: R097 Ref document number: 50215645 Country of ref document: DE Effective date: 20130815
2014-01-31	BERE	Be: lapsed	Owner name: BAYER MATERIALSCIENCE A.G. Effective date: 20130731
2014-02-28	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20121114
2014-02-28	REG	Reference to a national code	Ref country code: CH Ref legal event code: PL
2014-03-26	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 20130722
2014-04-23	REG	Reference to a national code	Ref country code: IE Ref legal event code: MM4A
2014-04-25	REG	Reference to a national code	Ref country code: FR Ref legal event code: ST Effective date: 20140331
2014-04-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130731 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130722 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130731 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130731
2014-05-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130731
2014-07-03	REG	Reference to a national code	Ref country code: DE Ref legal event code: R081 Ref document number: 50215645 Country of ref document: DE Owner name: COVESTRO DEUTSCHLAND AG, DE Free format text: FORMER OWNER: BAYER AG, 51373 LEVERKUSEN, DE Effective date: 20121031 Ref country code: DE Ref legal event code: R081 Ref document number: 50215645 Country of ref document: DE Owner name: COVESTRO DEUTSCHLAND AG, DE Free format text: FORMER OWNER: BAYER MATERIALSCIENCE AG, 51373 LEVERKUSEN, DE Effective date: 20140526 Ref country code: DE Ref legal event code: R081 Ref document number: 50215645 Country of ref document: DE Owner name: BAYER INTELLECTUAL PROPERTY GMBH, DE Free format text: FORMER OWNER: BAYER AG, 51373 LEVERKUSEN, DE Effective date: 20121031 Ref country code: DE Ref legal event code: R081 Ref document number: 50215645 Country of ref document: DE Owner name: BAYER INTELLECTUAL PROPERTY GMBH, DE Free format text: FORMER OWNER: BAYER MATERIALSCIENCE AG, 51373 LEVERKUSEN, DE Effective date: 20140526
2014-07-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130722
2014-09-15	REG	Reference to a national code	Ref country code: AT Ref legal event code: MM01 Ref document number: 584067 Country of ref document: AT Kind code of ref document: T Effective date: 20130722
2014-11-28	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130722
2015-06-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20121114
2015-07-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130722
2015-07-31	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: ES Payment date: 20150629 Year of fee payment: 14
2015-09-30	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: NL Payment date: 20150709 Year of fee payment: 14
2015-10-30	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: PT Payment date: 20150717 Year of fee payment: 14
2016-02-17	REG	Reference to a national code	Ref country code: DE Ref legal event code: R081 Ref document number: 50215645 Country of ref document: DE Owner name: COVESTRO DEUTSCHLAND AG, DE Free format text: FORMER OWNER: BAYER INTELLECTUAL PROPERTY GMBH, 40789 MONHEIM, DE
2017-03-01	REG	Reference to a national code	Ref country code: NL Ref legal event code: MM Effective date: 20160801
2017-04-28	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20160801
2017-05-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: PT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170123
2018-05-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20160723
2018-11-28	REG	Reference to a national code	Ref country code: ES Ref legal event code: FD2A Effective date: 20181128
2021-07-30	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: IT Payment date: 20210628 Year of fee payment: 20
2021-11-30	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 20210622 Year of fee payment: 20
2022-07-22	REG	Reference to a national code	Ref country code: DE Ref legal event code: R071 Ref document number: 50215645 Country of ref document: DE