公开(公告)号：US20240228704A1

公开(公告)日：2024-07-11

申请号：US18542990

申请日：2023-12-18

申请人： Evonik Fibres GmbH

发明人： Doris CRISTUREAN ,  Stephan BEER ,  Ian TEASDALE ,  Oliver BRÜGGEMANN

IPC分类号： C08G73/10

CPC分类号： C08G73/1007 ,  C08G73/1042 ,  C08G73/1046 ,  C08G73/1064 ,  C08G73/1067

摘要： The present invention relates to novel, melt-processable polyimides that shows a high glass transition temperature, a process for preparing these polyimides and also the use of the new polyimides

公开(公告)号：US11724978B2

公开(公告)日：2023-08-15

申请号：US17123004

申请日：2020-12-15

申请人： Evonik Fibres GmbH

发明人： Harald Rögl

IPC分类号： C07C51/275 ,  C07C51/43 ,  C07C65/34 ,  B01J3/02 ,  B01J19/00 ,  C01B21/40

CPC分类号： C07C51/275 ,  B01J3/02 ,  B01J19/0013 ,  C01B21/40 ,  C07C51/43 ,  B01J2219/00029 ,  B01J2219/00051 ,  C07C65/34

摘要： In a method for oxidizing 1,1-bis-(3,4-dimethylphenyl)-alkane with nitric acid in a pressure vessel to produce 3,3′,4,4′-benzophenone tetracarboxylic acid with concurrent formation of nitric oxide, passing nitric oxide from the pressure vessel into an absorption vessel and reacting nitric oxide in the absorption vessel with molecular oxygen and water to produce an aqueous nitric acid solution prevents discharge of nitric oxide, avoids the risk of oxygen inhibiting the nitric acid oxidation and reduces nitric acid consumption when the nitric acid from the absorption vessel is used for oxidizing the 1,1-bis-(3,4-dimethylphenyl)-alkane.

公开(公告)号：US20180221824A1

公开(公告)日：2018-08-09

申请号：US15748183

申请日：2016-07-18

申请人： EVONIK FIBRES GMBH

发明人： Tymen VISSER ,  Steven K. PEDERSEN

IPC分类号： B01D65/00 ,  B01D63/04 ,  B01D63/12 ,  B01D53/22

摘要： The present invention relates to novel cartridges and modules for separation of fluid mixtures, especially for gas separation, to a process for production thereof and to a method of use thereof.

公开(公告)号：US09873093B2

公开(公告)日：2018-01-23

申请号：US14900012

申请日：2014-05-22

申请人： Evonik Fibres GmbH

发明人： Tymen Visser ,  Markus Ungerank ,  Jörg Balster ,  Christoph Führer

IPC分类号： B01D53/22 ,  B01D67/00 ,  B01D71/64 ,  B01D69/08 ,  B29C71/02 ,  B29K79/00 ,  B29L31/00

CPC分类号： B01D71/64 ,  B01D53/228 ,  B01D67/0009 ,  B01D67/0083 ,  B01D69/08 ,  B01D2053/221 ,  B01D2053/224 ,  B01D2323/08 ,  B29C71/02 ,  B29C2071/022 ,  B29K2079/08 ,  B29L2031/755

摘要： The invention concerns polyimide membranes, preferably composed of P84 type 70 or P84 HT, having improved chemical and physical properties, a method of producing same and also their use.

公开(公告)号：US20210394125A1

公开(公告)日：2021-12-23

申请号：US17348747

申请日：2021-06-15

申请人： EVONIK FIBRES GMBH

发明人： Lars Peters ,  Kah Peng LEE ,  Dominik LEHNER

IPC分类号： B01D69/08 ,  B01D71/64 ,  B01D67/00 ,  B01D63/02

摘要： The present invention relates to high performance, crosslinked hollow-fibre membranes and a new process for manufacturing the same.

公开(公告)号：US20180169584A1

公开(公告)日：2018-06-21

申请号：US15576316

申请日：2016-06-08

申请人： Evonik Fibres GmbH

发明人： Tymen Visser ,  Steven Pedersen

IPC分类号： B01D63/02 ,  B01D63/06 ,  B01D53/22

CPC分类号： B01D63/021 ,  B01D53/22 ,  B01D63/02 ,  B01D63/06 ,  B01D2313/12 ,  B01D2313/44 ,  B01D2317/022

摘要： The present invention relates to novel cartridges and modules for separation of fluid mixtures, especially for gas separation, to a process for production thereof and to a method of use thereof.

公开(公告)号：US20220403170A1

公开(公告)日：2022-12-22

申请号：US17838234

申请日：2022-06-12

申请人： Evonik Fibres GmbH

发明人： Leonard W. Harvey ,  Stephan Beer

IPC分类号： C08L79/08 ,  C08G73/10 ,  C09D179/08 ,  C23C2/04 ,  C23C4/04 ,  B05D1/02 ,  B05D1/18 ,  B05D1/28

摘要： The invention relates to new polyimide solutions having ecological and toxicological benefits compared to existing polyimide solutions as well as well as b their use, in particular for coating applications.

公开(公告)号：US20210339189A1

公开(公告)日：2021-11-04

申请号：US17281962

申请日：2020-09-18

申请人： EVONIK FIBRES GMBH

发明人： Florian Winkler

IPC分类号： B01D53/22 ,  B01D53/86 ,  B01D5/00

摘要： In a device for separating methane from a gas mixture containing methane, carbon dioxide and hydrogen sulfide, comprising a gas compressor, two or three membrane separation stages downstream of the compressor and a hydrogen sulfide adsorber, comprising a bed of activated carbon having catalytic activity for oxidizing hydrogen sulfide with oxygen, arranged upstream of the membrane separation stages, oxygen content and relative humidity can be adjusted for optimum adsorption capacity of the hydrogen sulfide adsorber by recycling permeate from the second membrane separation stage, which receives the retentate of the first membrane separation stage, to a point upstream of the hydrogen sulfide adsorber.

公开(公告)号：US10933378B2

公开(公告)日：2021-03-02

申请号：US15576316

申请日：2016-06-08

申请人： Evonik Fibres GmbH

发明人： Tymen Visser ,  Steven Pedersen

IPC分类号： B01D63/02 ,  B01D63/06 ,  B01D53/22

摘要： The present invention relates to novel cartridges and modules for separation of fluid mixtures, especially for gas separation, to a process for production thereof and to a method of use thereof.

公开(公告)号：US20170368497A1

公开(公告)日：2017-12-28

申请号：US15540709

申请日：2015-12-22

申请人： Markus PRISKE ,  EVONIK FIBRES GMBH

发明人： Markus PRISKE

IPC分类号： B01D53/22 ,  B01D71/64 ,  B01D69/08

CPC分类号： B01D53/226 ,  B01D53/225 ,  B01D53/227 ,  B01D53/228 ,  B01D69/08 ,  B01D71/64 ,  B01D2053/224 ,  B01D2317/022 ,  B01D2317/025

摘要： The invention relates to a specific process and apparatus for separation of gas mixtures with reduced maintenance costs.