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公开(公告)号：US20220193653A1
公开(公告)日：2022-06-23
申请号：US17547330
申请日：2021-12-10
Applicant: Evonik Operations GmbH
Inventor： Johan Anton , Michael Grass , Johannes Kraft , Thomas Schneider , Grzegorz Ziomek
Abstract: The invention provides a process for regenerating a catalyst used for the hydrogenation of an aromatic species, consisting of several steps. First the system is purged with nitrogen, then air is metered in stepwise, and the addition of nitrogen is subsequently ended until only air is present.
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公开(公告)号：US20240092749A1
公开(公告)日：2024-03-21
申请号：US18263796
申请日：2022-01-26
Applicant: Evonik Operations GmbH , thyssenkrupp Uhde GmbH
Inventor： Maik BERNHARD , Sören Götz , Marc Brendel , Johan Anton , Matthias Pascaly , Thomas Noll , Jürgen Schemel
IPC: C07D301/32 , C07D301/12
CPC classification number: C07D301/32 , C07D301/12
Abstract: A process for the epoxidation of propene involves reacting propene with hydrogen peroxide, in the presence of a methanol solvent and a shaped titanium zeolite epoxidation catalyst in a fixed bed reactor. The process then involves recovering methanol from the reaction mixture, treatment of the recovered methanol by passing it through a bed of an acidic ion exchange resin, and recycling the treated methanol to the epoxidation reaction; as well as regeneration of the acidic ion exchange resin. Catalyst breakage can be reduced or avoided by washing the regenerated bed of an acidic ion exchange resin with methanol until the methanol exiting the resin bed has an apparent pH higher than 1.8, before methanol treated with the acidic ion exchange resin is recycled to the epoxidation reaction.
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3.发明授权公开(公告)号：US11192794B2
公开(公告)日：2021-12-07
申请号：US16770593
申请日：2018-11-23
Applicant: EVONIK OPERATIONS GMBH
Inventor： Franz Schmidt , Johan Anton , Matthias Pascaly , Andrea Heinroth , Stefan Wieland , Heiko Morell , Peter Kress , Michael Hagemann
Abstract: The present invention relates to a process for preparing a pulverulent, porous crystalline metal silicate, comprising the following steps: a) hydrothermal synthesis in an aqueous mixture comprising (A) at least one silicon source, (B) at least one metal source and (C) at least one mineralizer to obtain an aqueous suspension comprising a porous crystalline metal silicate as reaction product; and b) calcination of the reaction product, characterized in that the calcination is conducted by means of flame spray pyrolysis at an adiabatic combustion temperature within a range of 450-2200° C., wherein the suspension having a solids content of 70% by weight which is obtained in step a) is sprayed into a flame generated by combustion of a fuel in the presence of oxygen to form a pulverulent, porous crystalline metal silicate.
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Patent Agency Ranking
公开(公告)号：US11918989B2
公开(公告)日：2024-03-05
申请号：US17547330
申请日：2021-12-10
Applicant: Evonik Operations GmbH
Inventor： Johan Anton , Michael Grass , Johannes Kraft , Thomas Schneider , Grzegorz Ziomek
Abstract: The invention provides a process for regenerating a catalyst used for the hydrogenation of an aromatic species, consisting of several steps. First the system is purged with nitrogen, then air is metered in stepwise, and the addition of nitrogen is subsequently ended until only air is present.
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公开(公告)号：US20220193652A1
公开(公告)日：2022-06-23
申请号：US17543261
申请日：2021-12-06
Applicant: Evonik Operations GmbH
Inventor： Johannes Kraft , Lena Altmann , Johan Anton , Michael Grass
Abstract: The invention provides a process for regenerating a catalyst used for the ring hydrogenation of an aromatic species, especially an aromatic ester, wherein a gas stream containing a particular amount of oxygen is used for the regeneration.
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公开(公告)号：US11845849B2
公开(公告)日：2023-12-19
申请号：US17385323
申请日：2021-07-26
Applicant: Evonik Operations GmbH
Inventor： Johannes Kraft , Lena Altmann , Johan Anton , Michael Grass , Thomas Schneider
CPC classification number: C08K5/12 , B01J21/063 , B01J23/462 , C07C51/36 , C09D7/63 , C09J11/06
Abstract: A process prepares dialkyl 1,4-cyclohexanedicarboxylates by ring hydrogenation of the corresponding dialkyl terephthalate having a CO value of less than 0.3 mg KOH/g. The dialkyl 1,4-cyclohexanedicarboxylates thus produced can be used as plasticizers or as a component of a plasticizer composition for plastics, in particular PVC.
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公开(公告)号：US11701649B2
公开(公告)日：2023-07-18
申请号：US17543261
申请日：2021-12-06
Applicant: Evonik Operations GmbH
Inventor： Johannes Kraft , Lena Altmann , Johan Anton , Michael Grass
CPC classification number: B01J38/04 , B01J21/063 , B01J23/462 , B01J35/008 , B01J38/02
Abstract: The invention provides a process for regenerating a catalyst used for the ring hydrogenation of an aromatic species, especially an aromatic ester, wherein a gas stream containing a particular amount of oxygen is used for the regeneration.
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公开(公告)号：US20220033618A1
公开(公告)日：2022-02-03
申请号：US17385323
申请日：2021-07-26
Applicant: Evonik Operations GmbH
Inventor： Johannes Kraft , Lena Altmann , Johan Anton , Michael Grass , Thomas Schneider
Abstract: A process prepares dialkyl 1,4-cyclohexanedicarboxylates by ring hydrogenation of the corresponding dialkyl terephthalate having a CO value of less than 0.3 mg KOH/g. The dialkyl 1,4-cyclohexanedicarboxylates thus produced can be used as plasticizers or as a component of a plasticizer composition for plastics, in particular PVC.
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