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公开(公告)号：US11472822B2
公开(公告)日：2022-10-18
申请号：US16850198
申请日：2020-04-16
Applicant: Evonik Operations GmbH
Inventor： Wilfried Knott , Dagmar Windbiel , Horst Dudzik , Frauke Henning , Jan Caßens
Abstract: Processes are described for purifying acidic, preferably superacidic, in particular trifluoromethanesulfonic acid-acidified, end-equilibrated acetoxysiloxanes, wherein the acidic, preferably superacidic, in particular trifluoromethanesulfonic acid-acidified, acetic anhydride-containing and optionally acetic acid-containing equilibrated, preferably end-equilibrated acetoxysiloxane, which is optionally dissolved in an inert solvent, is contacted with a base, the precipitate is filtered off thereafter and then the filtrate obtained is optionally purified by distillation.
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公开(公告)号：US20200377669A1
公开(公告)日：2020-12-03
申请号：US15929844
申请日：2020-05-26
Applicant: Evonik Operations GmbH
Inventor： Wilfried Knott , Horst Dudzik , Dagmar Windbiel , Philippe Favresse , Michael Fiedel , André Brötzmann , Frauke Henning , Jan Caßens , Michael Ferenz
IPC: C08G77/00
Abstract: Branched SiOC-linked polyethersiloxanes have the following formula (I) where R1 is an alkyl radical having 1 to 4 carbon atoms or a phenyl radical, but preferably 90% of the radicals R1 are methyl radicals; b has a value of from 1 to 10; a has a value of from 1 to 200, preferably 10 to 100, a value of from 3 to 70 when b is ≥1 and ≤4, or a value of from 3 to 30 when b is >4; and R2 denotes identical or different polyether radicals, but at least one radical R2 is a structural element radical of formula (II): where p=at least 2, preferably p=2-6, particularly preferably p=3.
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公开(公告)号：US11279804B2
公开(公告)日：2022-03-22
申请号：US15929844
申请日：2020-05-26
Applicant: Evonik Operations GmbH
Inventor： Wilfried Knott , Horst Dudzik , Dagmar Windbiel , Philippe Favresse , Michael Fiedel , André Brötzmann , Frauke Henning , Jan Caßens , Michael Ferenz
Abstract: Branched SiOC-linked polyethersiloxanes have the following formula (I) where R1 is an alkyl radical having 1 to 4 carbon atoms or a phenyl radical, but preferably 90% of the radicals R1 are methyl radicals; b has a value of from 1 to 10; a has a value of from 1 to 200, preferably 10 to 100, a value of from 3 to 70 when b is ≥1 and ≤4, or a value of from 3 to 30 when b is >4; and R2 denotes identical or different polyether radicals, but at least one radical R2 is a structural element radical of formula (II): where p=at least 2, preferably p=2-6, particularly preferably p=3.
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公开(公告)号：US20200377665A1
公开(公告)日：2020-12-03
申请号：US16849013
申请日：2020-04-15
Applicant: Evonik Operations GmbH
Inventor： Wilfried Knott , Horst Dudzik , Frauke Henning , Jan Caßens
Abstract: Described is a process for producing preferably trifluoromethanesulfonic acid-acidified, end-equilibrated, acetoxy-bearing siloxanes which comprises reacting cyclic siloxanes, in particular comprising D4 and/or D5, and/or cyclic branched siloxanes of the D/T type with acetic anhydride using preferably trifluoromethanesulfonic acid as catalyst and with addition of acetic acid, wherein the cyclic branched siloxanes of the D/T type are mixtures of cyclic branched siloxanes of the D/T type which contain not only siloxanes comprising D and T units but also siloxanes comprising Q units.
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公开(公告)号：US20200377524A1
公开(公告)日：2020-12-03
申请号：US16850198
申请日：2020-04-16
Applicant: Evonik Operations GmbH
Inventor： Wilfried Knott , Dagmar Windbiel , Horst Dudzik , Frauke Henning , Jan Caßens
Abstract: Processes are described for purifying acidic, preferably superacidic, in particular trifluoromethanesulfonic acid-acidified, end-equilibrated acetoxysiloxanes, wherein the acidic, preferably superacidic, in particular trifluoromethanesulfonic acid-acidified, acetic anhydride-containing and optionally acetic acid-containing equilibrated, preferably end-equilibrated acetoxysiloxane, which is optionally dissolved in an inert solvent, is contacted with a base, the precipitate is filtered off thereafter and then the filtrate obtained is optionally purified by distillation.
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Patent Agency Ranking
公开(公告)号：US11370752B2
公开(公告)日：2022-06-28
申请号：US16482981
申请日：2018-01-31
Applicant: Evonik Operations GmbH
Inventor： Luca Cameretti , Jan Caßens , Ralf Meier
IPC: C07D201/04 , C07C45/48 , C07C49/413 , C07C49/307 , C07D201/10
Abstract: The invention relates to a method for producing cyclododecanone (CDON). During the production, contaminated cyclododecane (CDAN) is produced. This can be separated from CDON by distillation (CDAN-containing fraction). The separation of CDAN and impurities such as 13-oxabicyclo [7.3.1]tridecane occurs by crystallizing out CDAN from the CDAN-containing fraction.
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公开(公告)号：US11286351B2
公开(公告)日：2022-03-29
申请号：US16849013
申请日：2020-04-15
Applicant: Evonik Operations GmbH
Inventor： Wilfried Knott , Horst Dudzik , Frauke Henning , Jan Caßens
Abstract: Described is a process for producing preferably trifluoromethanesulfonic acid-acidified, end-equilibrated, acetoxy-bearing siloxanes which comprises reacting cyclic siloxanes, in particular comprising D4 and/or D5, and/or cyclic branched siloxanes of the D/T type with acetic anhydride using preferably trifluoromethanesulfonic acid as catalyst and with addition of acetic acid, wherein the cyclic branched siloxanes of the D/T type are mixtures of cyclic branched siloxanes of the D/T type which contain not only siloxanes comprising D and T units but also siloxanes comprising Q units.
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公开(公告)号：US11021575B2
公开(公告)日：2021-06-01
申请号：US16458226
申请日：2019-07-01
Applicant: Evonik Operations GmbH
Inventor： Wilfried Knott , Horst Dudzik , Frauke Henning , Jan Caßens
IPC: C08G77/00 , C08G77/392 , C07F7/08
Abstract: Described is a process for producing trifluoromethanesulfonic acid-acidified, end-equilibrated, acetoxy-bearing siloxanes which comprises reacting cyclic siloxanes, in particular comprising D4 and/or D5, and/or cyclic branched siloxanes of the D/T type with acetic anhydride using trifluoromethanesulfonic acid as catalyst and with addition of acetic acid.
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公开(公告)号：US11066429B2
公开(公告)日：2021-07-20
申请号：US16851252
申请日：2020-04-17
Applicant: Evonik Operations GmbH
Inventor： Wilfried Knott , Horst Dudzik , Frauke Henning , Jan Caßens
IPC: C07F7/08
Abstract: Described is a process for producing preferably trifluoromethanesulfonic acid-acidified, end-equilibrated, acetoxy-bearing siloxanes which comprises reacting cyclic siloxanes, in particular comprising D4 and/or D5, and/or cyclic branched siloxanes of the D/T type with acetic anhydride using preferably trifluoromethanesulfonic acid as catalyst and with addition of acetic acid, wherein the cyclic branched siloxanes of the D/T type are mixtures of cyclic branched siloxanes of the D/T type which may contain not only siloxanes comprising D and T units but also siloxanes comprising Q units.
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公开(公告)号：US20200377526A1
公开(公告)日：2020-12-03
申请号：US16851252
申请日：2020-04-17
Applicant: Evonik Operations GmbH
Inventor： Wilfried Knott , Horst Dudzik , Frauke Henning , Jan Caßens
IPC: C07F7/08
Abstract: Described is a process for producing preferably trifluoromethanesulfonic acid-acidified, end-equilibrated, acetoxy-bearing siloxanes which comprises reacting cyclic siloxanes, in particular comprising D4 and/ or D5, and/or cyclic branched siloxanes of the D/T type with acetic anhydride using preferably trifluoromethanesulfonic acid as catalyst and with addition of acetic acid, wherein the cyclic branched siloxanes of the D/T type are mixtures of cyclic branched siloxanes of the D/T type which may contain not only siloxanes comprising D and T units but also siloxanes comprising Q units.
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