Abstract:
Die vorliegende Erfindung betrifft die Verwendung von 2,5-Bisaminomethylfuran als Härter für Harzkomponenten aus Epoxidharz und Reaktivverdünner, sowie eine entsprechende härtbare Zusammensetzung, deren Härtung und das daraus erhältliche gehärtete Epoxidharz. Die vorliegende Erfindung betrifft weiter die Verwendung von 2,5-Bisaminomethylfuran als Härter für die Herstellung von Epoxidharz-basierten Beschichtungen, insbesondere von frühwasserbeständigen Bodenbeschichtungen.
Abstract:
The present invention relates to a process for preparing furan-2,5-dicarboxylic acid, the process comprising the following steps: (A-1) preparing or providing a starting mixture comprising one, two or more carbohydrate compounds selected from the group consisting of hexoses, oligosaccharides comprising hexose units, and polysaccharides comprising hexose units, and as the solvent or as a co-solvent for said carbohydrate compounds an amount of one or more carboxylic acid esters of formula (II) (A-2) subjecting said starting mixture to reaction conditions so that at least one of said one, two or more carbohydrate compounds reacts, and a fraction of said amount of one or more carboxylic acid esters of formula (II) is hydrolyzed, so that a mixture results comprising 5-(hydroxymethyl)furfural and/or said one or more HMF esters of formula (I), one or more carboxylic acids of formula (III) and a remaining fraction of said amount of one or more carboxylic acid esters of formula (II).
Abstract:
Beschrieben wird ein Verfahren umfassend das Herstellen einer Mischung umfassend 5-Hydroxymethylfurfural (HMF, Verbindung der Formel (I)) und das Abtrennen von 5-Hydroxymethylfurfural aus der hergestellten Mischung. Das erfindungsgemäße Verfahren umfasst die Schritte (A) Herstellen der Mischung umfassend eine oder mehrere ionische Flüssigkeiten und 5-Hydroxymethylfurfural in einer Menge von 5 bis 50 Gew.-% und (B) Abtrennen von 5-Hydroxymethylfurfural aus der in Schritt (A) hergestellten Mischung mittels Kurzwegverdampfung.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur kontinuierlichen Herstellung von 5-Hydroxymethylfurfural (nachfolgend als HMF bezeichnet, Verbindung der Formel (I)) in einer Reaktoranordnung, mit folgendem Schritt: - Einstellen von Reaktionsbedingungen in einem Gemisch G umfassend - ein, zwei oder mehr Eduktverbindungen ausgewählt aus der Gruppe bestehend aus Hexosen, Oligosacchariden umfassend Hexose-Einheiten, und Polysacchariden umfassend Hexose-Einheiten, - ein, zwei oder mehr organische Salze mit einem Schmelzpunkt 200 °C bei 1013,25 hPa, ausgewählt aus der Gruppe der organischen Salze mit einem Imidazolium- oder Phosphonium-Kation, - Wasser, - 5-Hydroxymethylfurfural (HMF) in einer Konzentration im Bereich von 15 Gew.-% bis 35 Gew.-%, bezogen auf die Gesamtmasse des Gemisches G, - optional weitere Substanzen, so dass sich bei den eingestellten Reaktionsbedingungen eine Menge der einen Eduktverbindung oder zumindest einer der zwei oder mehr Eduktverbindungen zu 5-Hydroxymethylfurfural (HMF) umsetzt.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellungvon 5-Hydroxymethylfurfural (nachfolgend auch als „HMF" bezeichnet, Verbindung der Formel (I)) und Huminenumfassend Schritte (a), (b), (c), (d), (e) und (f) (vgl. Figur 1 und den beigefügten Anspruch 1). Die vorliegende Erfindung betrifft zudem eine Anlage zur Durchführung des beschriebenen Verfahrens, sowie die Verwendung der beschriebenen Anlage zur Durchführung des beschriebenen Verfahrens.
Abstract:
The present invention relates to a process for preparing a mixture comprising 5-(hydroxy- methyl)furfural (HMF) and one or more HMF esters of formula (I, the process comprising the following steps: (A-1) preparing or providing a starting mixture comprising one, two or more carbohydrate compounds selected from the group consisting of hexoses, oligosaccharides comprising hexose units, and polysaccharides comprising hexose units, and as the solvent or as a co-solvent for said carbohydrate compounds an amount of one or more carboxylic acid esters of formula (II) (A-2) subjecting said starting mixture to reaction conditions so that at least one of said one, two or more carbohydrate compounds reacts, and a fraction of said amount of one or more carboxylic acid esters of formula (II) is hydrolyzed, so that a mixture results comprising 5-(hydroxymethyl)furfural and/or said one or more HMF esters of formula (I), one or more carboxylic acids of formula (III) and a remaining fraction of said amount of one or more carboxylic acid esters of formula (II) wherein the starting mixture prepared or provided in step (A-1) comprises a total amount of carboxylic acid esters of formula (II) of at least 50 wt.-%, based on the total weight of the starting mixture.
Abstract:
The present invention relates to a process forpreparingfuran-2,5-dicarboxylic acid, comprising the following steps: preparing or providing a starting mixture comprising5-(hydroxymethyl)furfural (HMF),5,5'-[oxy-bis(methylene)]bis-2-furfural (di-HMF), and water,subjecting said starting mixture to oxidation conditions in the presence of an oxygen-containing gas and a catalytically effective amount of a heterogeneous catalyst comprising one or more noble metals on a support so that both HMF and di-HMF react to give furane-2,5-dicarboxylic acid in a product mixture also comprising water and oxidation by-products. Moreover the present invention relates to the use of a catalyst comprising one or more noble metals on a support as an heterogeneous oxidation catalyst for catalyzing in an aqueous starting mixture the reaction of both HMF and di-HMF to furane-2,5-dicarboxylic acid.
Abstract:
The present invention relates to a process of making furan-2,5-dicarboxylic acid, comprising the following steps: (a) subjecting a starting mixture comprising 5-(hydroxymethyl)furfural and water to oxidation conditions in the presence of a heterogeneous oxidation catalyst and an oxygen-containing gas so that a first product mixture results comprising furan-2,5-dicarboxylic acid, water and by-products, (b) subjecting a mixture comprising water, said furan-2,5-dicarboxylic acid and said by-products to hydrogenation conditions in the presence of a heterogeneous hydrogenation catalyst so that a second product mixture results comprising furan-2,5-dicarboxylic acid, water and hydrogenated by-products, and subsequently (c) separating said furan-2,5-dicarboxylic acid from said hydrogenated by-products so that isolated furan-2,5-dicarboxylic acid results, wherein said first product mixture resulting from step (a) is heated and/or diluted with water to give said mixture subjected to hydrogenation conditions in step (b).
Abstract:
Provided herein is a process for preparing furan-2,5-dicarboxylic acid. The process includes the following steps: (A-1) preparing a starting mixture comprising one, two or more carbohydrate compounds selected from the group consisting of: hexoses, oligosaccharides comprising hexose units, and polysaccharides including hexose units, and as a solvent or as a co-solvent for the carbohydrate compounds an amount of one or more carboxylic acid esters of a formula (II) and (A-2) subjecting the starting mixture to reaction conditions so that at least one of the one, two or more carbohydrate compounds reacts, and a fraction of the amount of one or more carboxylic acid esters of formula (II) is hydrolyzed, resulting in a mixture including 5-(hydroxymethyl)furfural and/or the one or more HMF esters of a formula (I), one or more carboxylic acids of a formula (III) and a remaining fraction of the amount of one or more carboxylic acid esters of formula (II).