Abstract: A process for the production of furan derivatives from D-glucose, wherein A) D-glucose is converted into D-fructose in an enzymatic process, wherein redox cofactors are used and regenerated, whereby, as a result of at least two further enzymatically catalyzed redox reactions proceeding in the same reaction batch, one of the two redox cofactors accumulates in its reduced form and, respectively, the other one in its oxidized form, whereby D-glucose is converted into D-fructose, involving two or more oxidoreductases, and B) D-fructose is converted into furan derivatives, and the use of furan derivatives produced in this manner.

Abstract: Process for the selective production of oxidized furan derivatives starting from 5-hydroxymethyl-2-furfural in the presence of a solvent, an oxidation agent, a catalyst, and optionally a base, which process is characterized in that the oxidation process is carried out continuously in flow, and there are provided means for varying reaction parameters.

Abstract: A process for the production of furan derivatives from carbohydrates in the presence of an acidic catalyst, characterized in that N-methylpyrrolidone is used as a solvent and that the acidic catalyst is homogeneous.

Abstract: A process for the production of furan derivatives from carbohydrates in the presence of an acidic catalyst, characterized in that N-methylpyrrolidone is used as a solvent and that the acidic catalyst is homogeneous.

Abstract: A process for the production of furan derivatives from D-glucose, wherein A) D-glucose is converted into D-fructose in an enzymatic process, wherein redox cofactors are used and regenerated, whereby, as a result of at least two further enzymatically catalyzed redox reactions proceeding in the same reaction batch, one of the two redox cofactors accumulates in its reduced form and, respectively, the other one in its oxidized form, whereby D-glucose is converted into D-fructose, involving two or more oxidoreductases, and B) D-fructose is converted into furan derivatives, and the use of furan derivatives produced in this manner.

Abstract: A device is provided for cooling or heating vessels and containers for carrying out chemical or physical reactions. The device includes the following components in a vertical direction from top to bottom: a heat-conductive cooling or heating plate; at least one Peltier element equipped with electrical connections; optionally at least one heat-conductive separator plate between two Peltier elements respectively; a heat-conductive thermoblock, through which one or more fluid channels pass, for dissipation and supply of heat from and to the at least one Peltier element; and an external control unit for the at least one Peltier element. The components rest on top of one another and are therefore in direct planar contact with one another.