Abstract: A process for the recovery of a light boiler and a heavy boiler from a vapor stream, where the process includes: A1) introducing a vapor stream containing a light boiler and a heavy boiler into a column at a point at the bottom of the column, A2) withdrawing a vapor stream, enriched in the light boiler, from the top of the column, A3) withdrawing a liquid stream, enriched in the heavy boiler, from the bottom of the column, and splitting the stream into a partial stream and a partial stream, A4) recycling the stream back into the column at a point above the column, wherein the stream is kept essentially adiabatically during the recycling, A5) withdrawing a stream, enriched in a middle boiler, from the middle section of the column and splitting the stream into a partial stream and a partial stream, A6) cooling the partial stream in the heat exchanger to provide the cooled stream and recycling the stream as stream back into the column at an introduction point below the top of the column, and A7) withdrawing the
Abstract: A method for separating butenes from C4 hydrocarbon streams containing butanes and butenes involves extractive distillation with a suitable solvent. The method also involves heat integration, which makes it possible to use the heat of the solvent in order to heat various streams.
Type:
Application
Filed:
January 21, 2022
Publication date:
February 1, 2024
Applicant:
Evonik Operations GmbH
Inventors:
Philip LUTZE, Stephan Peitz, Armin Matthias Rix, Tanita Valèrie Six, Moritz Schröder, Niklas Paul
Abstract: Mixture compositions contain A) crosslinked organopolysiloxanes having organopolysiloxane units linked by a building block containing polyether groups, and B) crosslinked organopolysiloxanes having organopolysiloxane units bridged by a bridging siloxane. The mixture compositions are useful, for example, as an emulsifier, for stabilizing formulations, and for dispersion of solid pigments.
Type:
Application
Filed:
December 8, 2021
Publication date:
February 1, 2024
Applicant:
Evonik Operations GmbH
Inventors:
Sadik AMAJJAHE, Stefan Bergfried, Achim Friedrich
Abstract: A process for purifying ethylene cyanohydrin involves incubating an industrial grade ethylene cyanohydrin product with at least one titanium(IV)alkoxide. Ethylene cyanohydrin products with purities of >99% contain less than 0.05% of ethylene glycol (EG), and/or contain a water content of less than 1000 ppm.
Type:
Application
Filed:
November 8, 2021
Publication date:
February 1, 2024
Applicant:
Evonik Operations GmbH
Inventors:
Sebastian Bestgen, Günther Gräff, Maik Caspari, Thorben Schütz, Harald Trauthwein
Abstract: Nanoparticle compositions contain a graphene-based material. A preparation process involves providing several components and milling a mixture. The nanoparticle compositions can be used as a lubricant additive to improve tribological performance, in particular to improve anti-friction and anti-wear performance on metal parts. A corresponding lubricant composition contains these nanoparticle compositions.
Type:
Application
Filed:
August 11, 2021
Publication date:
February 1, 2024
Applicant:
Evonik Operations GmbH
Inventors:
Verena BREUERS, Daniel Neß, Stephan Wieber, Valeri Leich, Jonas Hönig, Michael Gerhard Hagemann, Willibald Wombacher, Christian Däschlein
Abstract: A process can be used for producing a distillate product with a methanol concentration greater than the concentration of methanol in the minimum boiling azeotrope of methanol and methyl(meth)acrylate, from a mixture with a methanol concentration less than the concentration of methanol in the minimum boiling azeotrope of methanol and methyl (meth)acrylate, in a distillation column. A transesterification process for preparing C6- to C2- alkyl, aryl or alkenyl (meth)acrylates from methyl(meth)actylate is also provided.
Type:
Application
Filed:
February 7, 2022
Publication date:
February 1, 2024
Applicant:
EVONIK OPERATIONS GMBH
Inventors:
Marcel TRESKOW, Jerald Andrew Jones, Marc Becker, Zoe Zegers, Kevin Lackey, Ghanem Sabeeh, Alexander May
Abstract: The invention relates to a method for preparation of (meth)acrylic acid esters from (meth)acrylic acid anhydrides. The method involves: reacting a (meth)acrylic acid anhydride of Formula (I): wherein R1 is a hydrogen atom or a methyl group; with a substrate in the presence of a first catalyst to form a product mixture comprising the (meth)acrylic acid ester; and wherein: the substrate is selected from the group consisting of: primary alcohols; secondary alcohols; tertiary alcohols; and phenols; and the first catalyst comprises a salt of magnesium or of a rare earth element.
Abstract: A composition contains at least one aldehyde (A), at least one phenolic compound (B), and at least one amine (C) bearing at least two amino groups selected from primary and secondary amino groups. At least one of these compounds bears at least one (meth)acrylate group. A fibre-reinforced composition contains the composition. The compositions can be cured in a process, and fibre composite materials/thermosets are obtainable by the process.
Abstract: A process for the production of functionalized particle foam mouldings based on a thermoplastic base material with a glass transition temperature of at least 100° C. involves functionalization of base particles.
Type:
Application
Filed:
November 16, 2021
Publication date:
January 25, 2024
Applicant:
Evonik Operations GmbH
Inventors:
Christian TRAßL, Florian Hopf, Mona Ganglauf
Abstract: The present invention refers to a method for producing hydroxylated fatty acids by oxidizing at least one unsaturated fatty acid by at least one lipoxygenase and thereafter reducing the obtained compound by at least one peroxidase and/or heating. Furthermore, the present invention refers to the compound obtained by said method.
Type:
Application
Filed:
November 19, 2021
Publication date:
January 25, 2024
Applicant:
Evonik Operations GmbH
Inventors:
Rima JABER, Katharina BERSE, Eva Maria WITTMANN
Abstract: An improved process can be used for the acid hydrolysis of polylaurolactam with sulfuric acid. An especially suitable starting material is polylaurolactam which is intended for recycling and which is characterized by a low laurolactam content.
Type:
Application
Filed:
September 14, 2021
Publication date:
January 18, 2024
Applicant:
Evonik Operations GmbH
Inventors:
Alexander Richter, Christian Nörmberg, Norbert Kern, Florian Hermes, Franz-Erich Baumann, Martin Roos, Daniel Demicoli
Abstract: A process for making propene oxide involves reacting propene with hydrogen peroxide in the presence of methanol, a titanium zeolite epoxidation catalyst, and nitrogen containing compounds present in an amount of from 100 to 3000 mg/kg of hydrogen peroxide. Non-reacted propene is separated from the reaction mixture; the propene depleted reaction mixture is continuously distilled in a distillation column providing an overhead product stream containing propene oxide and methanol and a bottoms product stream; and propene oxide is separated from the overhead product stream. An acid is added to the propane depleted reaction mixture and/or to the distillation column at the same level or above the feed point for the propene depleted reaction mixture and/or contacted to the feed to the distillation column to provide an apparent pH in the bottoms product stream of from 3 to 4.5, which reduces the nitrogen content of the separated propene oxide.
Abstract: A method for preparing guanidino acetic acid involves reacting cyanamide and glycine in an aqueous reaction mixture in the presence of a base. The ammonia content in the reaction mixture is controlled to be below 20 g/L, and the dicyandiatrade content in the reaction mixture is kept below 5 wt.-%.
Type:
Application
Filed:
August 19, 2021
Publication date:
January 11, 2024
Applicant:
Evonik Operations GmbH
Inventors:
Timo Stahl, Axel Ronneburg, Barbara Jäger, Philipp Roth
Abstract: A method for preparing 3-hydroxy-3-methylbutyric acid (HMB) or salts thereof from tertbutanol and carbon monoxide, may include reacting tert-butanol in an aqueous mixture with carbon monoxide under electrolytic conditions. The electrolytic conditions may include applying an electric potential to the aqueous reaction mixture in a range of from 1.5 and 25 V and/or operating electrodes at a current density in a range of from 1 to 10.000 A/m2. The electric potential may be applied to the aqueous mixture using a diamond anode and/or a steel cathode. The reaction may be conducted in the presence of at least one conducting electrolyte.
Type:
Application
Filed:
July 13, 2021
Publication date:
January 11, 2024
Applicant:
Evonik Operations GmbH
Inventors:
Timo STAHL, Patrik STENNER, Axel RONNEBURG, Julian TEICHMANN
Abstract: The invention relates to functionalized polymers, a process for producing functionalized polymers and the use of functionalized polymers, especially in the field of personal care.