Abstract: The invention relates to a method for grinding an inorganic solid from the series cement clinker, pozzolan and/or raw material for cement production, where a grinding additive is added before or during grinding, and the grinding additive, based on the dry mass, comprises 6% to 80% by weight of caprolactam and 1.5% to 30% by weight of aminocaproic acid, where, based in each case on the dry mass, 0.002% to 2% by weight of the grinding additive is used, based on the total solid. Further claimed are a grinding additive and the use thereof for increasing the compressive strength of the cured product produced therewith.

Abstract: The invention relates to a method for grinding an inorganic solid from the series cement clinker, pozzolan and/or raw material for cement production, where a grinding additive is added before or during grinding, and the grinding additive, based on the dry mass, comprises 6% to 80% by weight of caprolactam and 1.5% to 30% by weight of aminocaproic acid, where, based in each case on the dry mass, 0.002% to 2% by weight of the grinding additive is used, based on the total solid. Further claimed are a grinding additive and the use thereof for increasing the compressive strength of the cured product produced therewith.

Abstract: The present invention relates to a process for preparing alkyl thiols by adding hydrogen sulfide to double bonds of C6-C20 olefins at a temperature of from 20 to 150° C. and a pressure of from 1 to 40 bar, wherein the reaction is carried out in the presence of at least one organic, liquid acid, and to the use of organic, liquid acids as a catalyst for increasing the selectivity and/or reaction rate in the addition of hydrogen sulfide to double bonds of C6-C20 olefins to prepare alkyl thiols.