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Heterogeneous construction waste such as masonry rubble has potential as a raw material for the production of lightweight aggregates similar to expanded clays or even pumice. In the present paper, the suitability of feedstocks with considerable gypsum contents was investigated in a pilot plant. Based on the results, initial technological statements could be made. According to these, energetic advantages can be expected in comparison with lightweight aggregates made from expanded clays. [ABSTRACT FROM AUTHOR]

The possibility of using heterogeneous construction waste such as masonry rubble as a raw material for the production of lightweight aggregates similar to expanded clays or even pumice has already been reported earlier. This approach has been consistently pursued. As a current aspect, the extent to which gypsum‐containing masonry rubble is also suitable as a raw material was investigated. This not only avoids (expensive) landfilling of this material, but at the same time makes a contribution to at least partially filling the "gypsum gap" created by the elimination of flue gas desulfurization gypsum. The first part of this publication reports on laboratory‐scale tests. The second part focuses on testing the process in the pilot plant. [ABSTRACT FROM AUTHOR]

Although 2-hydroxybenzaldehyde acylhydrazones, such as salicylaldehyde acylhydrazones, are intriguing bioactive molecules, few of their N-alkylated derivatives are known, and only methyl analogues have been reported previously. We achieved selective N-alkylation of 2-hydroxybenzaldehyde acylhydrazones, as their Fe(III) complexes, by using combinations of alkylating agents (for example, an alkyl bromide and a dialkyl sulfate). Fifteen substrates were examined, and 45 new 2-hydroxybenzaldehyde acyl(alkyl)hydrazones were synthesized in moderate to good yields. In all cases, the target products were obtained exclusively, and no O-alkylation byproducts were produced. The method provides an efficient way of preparing 2-hydroxybenzaldehyde acyl(alkyl)hydrazones. [ABSTRACT FROM AUTHOR]

The article describes the introduction of TENSAGEX Prime, an ether sulfate with optimized 1,4-dioxane content, by KLK Tensachem. This product meets the requirements of a new regulation from the state of New York in 2019, which demands a very low 1,4-dioxane content in SLES (Sodium Laureth Sulfate). KLK Tensachem has reduced the 1,4-dioxane content in its ether sulfates to a technical minimum through innovative technologies. The TENSAGEX Prime portfolio includes various ether sulfates with low 1,4-dioxane values. KLK Tensachem and Stockmeier Chemie offer this solution with dioxane values below 5 ppm. The distribution of the TENSAGEX Prime range is carried out through the Stockmeier Group in Germany, Austria, Switzerland, and Poland. [Extracted from the article]