Inventor · disambiguated record
Dirk Fridag
Also filed as: FRIDAG DIRK
91 granted patents·54 pending applications·351 citations·filing 2003–2025
99Inventor score
Files withEVONIK DEGUSSA GMBH44EVONIK OXENO GMBH & CO KG30EVONIK OPERATIONS GMBH20DYBALLA KATRIN MARIE19CHRISTIANSEN ANDREA4
Top patents by PatentIndex Score
145 records- 0198US9725398B2Benzene-based diphosphine ligands for alkoxycarbonylationEVONIK DEGUSSA GMBH·Filed 2016·Granted Aug 8, 2017·12 cites·14 claims
- 0298US9676805B2Purifying organophosphorus compounds contaminated with chlorineEVONIK DEGUSSA GMBH·Filed 2015·Granted Jun 13, 2017·22 cites·15 claims
- 0396US10294191B2Monophosphine compounds and palladium catalysts based thereon for the alkoxycarbonylation of ethylenically unsaturated compoundsEVONIK DEGUSSA GMBH·Filed 2016·Granted May 21, 2019·6 cites·10 claims
- 0496US10202329B2Ferrocene-based compounds and palladium catalysts based thereon for the alkoxycarbonylation of ethylenically unsaturated compoundsEVONIK DEGUSSA GMBH·Filed 2016·Granted Feb 12, 2019·6 cites·14 claims
- 0596US10077228B2Ferrocene-based compounds and palladium catalysts based thereon for the alkoxycarbonylation of ethylenically unsaturated compoundsEVONIK DEGUSSA GMBH·Filed 2016·Granted Sep 18, 2018·7 cites·16 claims
- 0695US11008275B2Process for preparing carboxylic acids or salts thereof from hydrocarbonsEVONIK OPERATIONS GMBH·Filed 2020·Granted May 18, 2021·5 cites·19 claims
- 0795US10501392B2Method for obtaining alcohols from aldehydes IIEVONIK DEGUSSA GMBH·Filed 2018·Granted Dec 10, 2019·17 cites·20 claims
- 0895US10000440B2Influencing the viscosity of N-butene-based ester mixtures by controlled use of ethene in the preparation of the ester precursorsEVONIK DEGUSSA GMBH·Filed 2016·Granted Jun 19, 2018·7 cites·11 claims
- 0994US10577297B2Method for obtaining alcohols from aldehydesEVONIK DEGUSSA GMBH·Filed 2018·Granted Mar 3, 2020·11 cites·20 claims
- 1094US10562833B2Method for obtaining alcohols from aldehydes IIIEVONIK DEGUSSA GMBH·Filed 2018·Granted Feb 18, 2020·12 cites·20 claims
- 1194US8581008B2Process for preparing α,β-unsaturated C10-aldehydesKAIZIK ALFRED·Filed 2010·Granted Nov 12, 2013·12 cites·18 claims
- 1293US9688604B2Phosphine ligand and palladium catalysts based thereon for the alkoxycarbonylation of ethylenically unsaturated compoundsEVONIK DEGUSSA GMBH·Filed 2016·Granted Jun 27, 2017·7 cites·7 claims
- 1393US9272973B2Stable long-term method for producing C5-aldehydesFRIDAG DIRK·Filed 2013·Granted Mar 1, 2016·9 cites·13 claims
- 1493US9221850B2Monophosphite ligands having a tert-butyloxycarbonyl groupDYBALLA KATRIN MARIE·Filed 2015·Granted Dec 29, 2015·6 cites·18 claims
- 1592US9914681B2Preparation of high-quality oxo process alcohols from inconstant raw material sourcesGEILEN FRANK·Filed 2015·Granted Mar 13, 2018·13 cites·19 claims
- 1692US9556096B2Unsymmetric bisphosphiteEVONIK DEGUSSA GMBH·Filed 2013·Granted Jan 31, 2017·6 cites·18 claims
- 1791US8884070B2Energy efficient synthesis of aliphatic aldehydes from alkenes and carbon dioxideFRANKE ROBERT·Filed 2011·Granted Nov 11, 2014·10 cites·18 claims
- 1890US9790244B2Bisphosphites having an unsymmetric outer biphenol unitDYBALLA KATRIN MARIE·Filed 2015·Granted Oct 17, 2017·3 cites·5 claims
- 1989US10562838B2Process for the alkoxycarbonylation of olefins in a medium having a low Brønsted acid concentrationEVONIK DEGUSSA GMBH·Filed 2017·Granted Feb 18, 2020·3 cites·12 claims
- 2089US8563782B2Producing α,β-unsaturated aldehydes by means of a reaction mixing pumpKAIZIK ALFRED·Filed 2010·Granted Oct 22, 2013·8 cites·19 claims
- 2189US8461394B2Process for preparing C5 aldehyde mixtures with a high n-pentanal contentLUEKEN HANS-GERD·Filed 2009·Granted Jun 11, 2013·19 cites·18 claims
- 2288US10017443B2Optimized separation technique for work-up of homogeneously catalysed hydroformylation mixturesLUEKEN HANS GERD·Filed 2014·Granted Jul 10, 2018·5 cites·14 claims
- 2388US9737884B2Process for catalytic preparation of aldehydes from olefins using monophosphite mixturesDYBALLA KATRIN MARIE·Filed 2015·Granted Aug 22, 2017·3 cites·7 claims
- 2488US9206105B2Mixture of bisphosphites and use thereof as a catalyst mixture in hydroformylationCHRISTIANSEN ANDREA·Filed 2013·Granted Dec 8, 2015·5 cites·19 claims
- 2588US9127030B2Method for the preparation of biphephosKREIDLER BURKARD·Filed 2011·Granted Sep 8, 2015·13 cites·19 claims
- 2688US7495134B2Carbonylation method by adding secondary sterically hindered aminesEVONIK OXENO GMBH·Filed 2006·Granted Feb 24, 2009·12 cites·21 claims
- 2788US2023348356A1Butyl-bridged diphosphine ligands for alkoxycarbonylationEVONIK OPERATIONS GMBH·Filed 2023·Application pending·0 cites
- 2887US11396488B2Process for preparing aldehydes and separation of the catalyst system by membrane separationEVONIK OPERATIONS GMBH·Filed 2021·Granted Jul 26, 2022·1 cites·21 claims
- 2987US9409844B2Mixture of different asymmetrical bisophosphites and use thereof as a catalyst mixture in hydroformylationEVONIK DEGUSSA GMBH·Filed 2013·Granted Aug 9, 2016·3 cites·16 claims
- 3085US10526356B2Bisphosphites having 2,4-tert-butylphenyl units and use thereof as ligands in hydroformylationEVONIK DEGUSSA GMBH·Filed 2017·Granted Jan 7, 2020·2 cites·13 claims
- 3185US7345185B2Method for producing organoacylphosphitesOXENO OLEFINCHEMIE GMBH·Filed 2004·Granted Mar 18, 2008·18 cites·18 claims
- 3285US7317130B2Method for the hydroformylation of olefinically unsaturated compounds, especially olefins, in the presence of cyclic carbonic acid estersOXENO OLEFINCHEMIE GMBH·Filed 2003·Granted Jan 8, 2008·16 cites·16 claims
- 3383US9499463B2Mixtures of constitutionally isomeric bisphosphitesEVONIK DEGUSSA GMBH·Filed 2013·Granted Nov 22, 2016·2 cites·18 claims
- 3483US9149780B2Jet loop reactor having nanofiltrationHAMERS BART·Filed 2012·Granted Oct 6, 2015·4 cites·12 claims
- 3583US7767861B2Method for producing trivalent organophosphorus compoundsEVONIK OXENO GMBH·Filed 2004·Granted Aug 3, 2010·16 cites·17 claims
- 3682US9221851B2Mixture containing a monophosphite ligand and the use thereof for catalysis of a hydroformylation reactionDYBALLA KATRIN MARIE·Filed 2015·Granted Dec 29, 2015·2 cites·20 claims
- 3782US7193116B2Method for producing aldehydes by means of hydroformylation of olefinically unsaturated compounds, said hydroformylation being catalyzed by unmodified metal complexes in the presence of cyclic carbonic acid estersOXENO OLEFINCHEMIE GMBH·Filed 2003·Granted Mar 20, 2007·21 cites·21 claims
- 3881US9879353B2Electrochemical coupling of two phenols which differ in their oxidation potentialDYBALLA KATRIN MARIE·Filed 2013·Granted Jan 30, 2018·2 cites·8 claims
- 3981US8729287B2Method for producing 6-chlorodibenzo[d,f] [1,3,2]-dioxaphosphepinFRIDAG DIRK·Filed 2009·Granted May 20, 2014·4 cites·19 claims
- 4080US10167245B2Method for hydroformylating cyclooctadiene using 4-([1,1′:3′,1″-terphenyl]-2′-yloxy)-S-dinaphtho[2,1-D:1′,2′-F][1,3,2]dioxaphosphepineEVONIK DEGUSSA GMBH·Filed 2018·Granted Jan 1, 2019·1 cites·5 claims
- 4180US9938310B21, 1′-bis(phosphino)ferrocene ligands for alkoxycarbonylationEVONIK DEGUSSA GMBH·Filed 2017·Granted Apr 10, 2018·1 cites·20 claims
- 4280US9428433B2Control of the viscosity of reaction solutions in hydroformylation processesFRIDAG DIRK·Filed 2013·Granted Aug 30, 2016·4 cites·9 claims
- 4379US10214550B2Bisphosphites having an unsymmetric outer biphenol unitEVONIK DEGUSSA GMBH·Filed 2017·Granted Feb 26, 2019·1 cites·14 claims
- 4479US9290527B2Method for producing 6-chlorodibenzo[D,F] [1,3,2] dioxaphosphepinEVONIK DEGUSSA GMBH·Filed 2014·Granted Mar 22, 2016·2 cites·19 claims
- 4577US10544174B2Process for the alkoxycarbonylation of ethylenically unsaturated compounds with monophosphine ligandsEVONIK DEGUSSA GMBH·Filed 2017·Granted Jan 28, 2020·1 cites·5 claims
- 4676US9670585B2Electrochemical coupling of a phenol to a naphtholDYBALLA KATRIN MARIE·Filed 2013·Granted Jun 6, 2017·1 cites·7 claims
- 4776US2021276939A1Butyl-bridged diphosphine ligands for alkoxycarbonylationEVONIK OPERATIONS GMBH·Filed 2021·Application pending·0 cites
- 4874US11840506B2Process for preparing C5 aldehydesEVONIK OPERATIONS GMBH·Filed 2023·Granted Dec 12, 2023·0 cites·17 claims
- 4974US11565991B2Mixture of bisphosphites having an open and a closed outer unit and the use thereof as a catalyst mixture in hydroformylationEVONIK OPERATIONS GMBH·Filed 2022·Granted Jan 31, 2023·0 cites·6 claims
- 5073US11618760B2Diphosphites with an open, 3-methylated outer unitEVONIK OPERATIONS GMBH·Filed 2022·Granted Apr 4, 2023·0 cites·10 claims
Showing the top 50 of 145 patent records by PatentIndex Score.
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