The present invention relates to novel combinations of redox active compounds for use as redox flow battery electrolytes. The invention further provides kits comprising these combinations, redox flow batteries, and method using the combinations, kits and redox flow batteries of the invention.

The present invention relates to novel combinations of redox active compounds for use as redox flow battery electrolytes. The invention further provides kits comprising these combinations, redox flow batteries, and method using the combinations, kits and redox flow batteries of the invention.

The invention relates to a method for producing 2,3,5-trimethyl benzoquinone or a compound containing 2,3,5-trimethyl benzoquinone, the method comprising the following steps: Oxidation of 2,3,6-trimethylphenol with oxygen or an oxygen-containing gas in a two-or multi-phase reaction medium in the presence of a catalyst or catalyst system containing at least one copper (II)-halide to a mixture containing 2,3,5-trimethyl benzoquinone, characterized in that the reaction medium contains water and at least one secondary aliphatic acyclic alcohol having 6 or more, preferably 7 or more, carbon atoms.

The invention relates to a method for producing 2,3,5-trimethyl benzoquinone or a compound containing 2,3,5-trimethyl benzoquinone, the method comprising the following steps: Oxidation of 2,3,6-trimethylphenol with oxygen or an oxygen-containing gas in a two-or multi-phase reaction medium in the presence of a catalyst or catalyst system containing at least one copper (II)-halide to a mixture containing 2,3,5-trimethyl benzoquinone, characterized in that the reaction medium contains water and at least one secondary aliphatic acyclic alcohol having 6 or more, preferably 7 or more, carbon atoms.

The invention relates to a method for producing 2,3,5-trimethyl benzoquinone or a compound containing 2,3,5-trimethyl benzoquinone, the method comprising the following steps: Oxidation of 2,3,6-trimethylphenol with oxygen or an oxygen-containing gas in a two-or multi-phase reaction medium in the presence of a catalyst or catalyst system containing at least one copper (II)-halide to a mixture containing 2,3,5-trimethyl benzoquinone, characterized in that the reaction medium contains water and at least one secondary aliphatic acyclic alcohol having 6 or more, preferably 7 or more, carbon atoms.

A process for producing reduced coenzyme Q.sub.10 includes removing moisture from an aqueous suspension including a reduced coenzyme Q.sub.10-containing microbial cell or a disrupted cell thereof such that a de-moisturized substance is obtained and in contact with an oxidizing atmosphere, and that an oxidized coenzyme Q.sub.10 is produced in an amount of 50 mass % or more relative to a total amount of the oxidized and reduced coenzymes Q.sub.10, and reducing the oxidized coenzyme Q.sub.10 outside a microbial cell such that a reduced coenzyme Q.sub.10 is recovered.

A process for producing reduced coenzyme Q.sub.10 includes removing moisture from an aqueous suspension including a reduced coenzyme Q.sub.10-containing microbial cell or a disrupted cell thereof such that a de-moisturized substance is obtained and in contact with an oxidizing atmosphere, and that an oxidized coenzyme Q.sub.10 is produced in an amount of 50 mass % or more relative to a total amount of the oxidized and reduced coenzymes Q.sub.10, and reducing the oxidized coenzyme Q.sub.10 outside a microbial cell such that a reduced coenzyme Q.sub.10 is recovered.

A process for producing reduced coenzyme Q.sub.10 includes removing moisture from an aqueous suspension including a reduced coenzyme Q.sub.10-containing microbial cell or a disrupted cell thereof such that a de-moisturized substance is obtained and in contact with an oxidizing atmosphere, and that an oxidized coenzyme Q.sub.10 is produced in an amount of 50 mass % or more relative to a total amount of the oxidized and reduced coenzymes Q.sub.10, and reducing the oxidized coenzyme Q.sub.10 outside a microbial cell such that a reduced coenzyme Q.sub.10 is recovered.

A composition comprising a compound of formula (Va) wherein n is 1 or 2 and wherein m is 1 or 2, with n and m preferably both being 1 or both being 2, more preferably both being 1, and/or, preferably and, a compound of formula, wherein n is 1 or 2 and wherein m is 1 or 2, with n and m preferably both being 1 or both being 2, more preferably both being 1, and wherein at least 90 weight-% of the composition consist of compounds of formula (Va) and formula (Vb). ##STR00001##

A composition comprising a compound of formula (Va) wherein n is 1 or 2 and wherein m is 1 or 2, with n and m preferably both being 1 or both being 2, more preferably both being 1, and/or, preferably and, a compound of formula, wherein n is 1 or 2 and wherein m is 1 or 2, with n and m preferably both being 1 or both being 2, more preferably both being 1, and wherein at least 90 weight-% of the composition consist of compounds of formula (Va) and formula (Vb). ##STR00001##