Abstract: In a process for purifying carboxylic acids comprising halogen compounds, the carboxylic acid is distilled in the presence of a nonvolatile auxiliary base, the halide of which is liquid at the boiling temperature of the carboxylic acid. The auxiliary base binds the hydrogen halide which is present in the carboxylic acid and/or has been eliminated from halogen compounds as a result of thermal action and lowers the vapor pressure thereof in this way, such that the hydrogen halide is held in the distillation bottoms and is not transferred into the distillate. Since the halide of the auxiliary base is liquid, the formation of solid deposits in the distillation apparatus is prevented. The carboxylic acid optionally also comprises at least one low boiler.

Abstract: Method of distilling mixtures comprising salts having a melting point of less than 200° C. at 1 bar (ionic liquids), wherein the mixtures additionally comprise an organic compound (called distillation aid below) which is not ionic has a molecular weight of less than 5000 has a boiling point which is at least 5° C. higher compared with the ionic mixtures included in the mixture.

Abstract: The present invention provides the use of a UV absorber for reducing the E/Z isomerization of pesticides comprising a double bond. It furthermore relates to a composition comprising an E and/or a Z isomer of a pesticide comprising a double bond and a UV absorber.

Abstract: Process for producing cellulose beads or lignocellulose beads, wherein cellulose or lignocellulose is dissolved in a solvent which comprises more than 50% by weight of the symmetrical imidazolium compound of the formula I below where R1 and R3 are each an identical organic radical having from 2 to 20 carbon atoms, R2, R4 and R5 are each an H atom, X is an anion and n is 1, 2 or 3, and cellulose beads or lignocellulose beads are produced from the solution obtained, and also the use of the beads obtained for petroleum or natural gas recovery.