Abstract: The invention relates to the stabilization of the activity and/or the reactivation of molybdoheteropoly acid catalysts in vapor-phase oxidations, such as the oxidehydrogenation of isobutyric acid or its lower esters to methacrylic acid or its lower esters, by means of an oxidizing treatment of the catalyst in which compounds of catalyst constituents are added, at temperatures ranging from 200.degree. to 400.degree. C., with an oxygen-containing gas.The inventive activation measures can be carried out either during the catalytic vapor-phase reaction, such as oxihydrogenation in particular, or intermittently to alternate therewith, and optionally also physically separated in part from each other.

Abstract: A method for the solvent dewaxing of wax-containing petroleum products with at least one solvent suitable for dewaxing and a polymeric dewaxing aid comprising polyacrylates, by mixing the products to be dewaxed with the solvent and the polymeric dewaxing aid, chilling the mixture so obtained, and separating the precipitated wax, the dewaxing aid used being a mixture of(I) a polymer of esters of acrylic acid with C.sub.10 -C.sub.40 alkanols and(II) a polymer of esters of methacrylic acid with alkanols comprising more than 10 weight percent of branched alkanols,the weight ratio between components (I) and (II) ranging from 1:20 to 20:1.

Abstract: Cardioactive 3-methyl-3-(3,4-dialkoxybenzyl)-piperazine compounds of the formula ##STR1## and their salts with physiologically tolerable acids; methods for making the same; pharmaceutical compositions containing the compounds as an active ingredient; and methods of treating cardiac diseases such as arrhythmia with said compounds.

Abstract: A method for the monoalkylation of tin tetrachloride by reaction of tin tetrachloride at 20.degree. -70.degree. C. with a stoichiometric amount of an ether donor complex or of a tertiary amine donor complex of an aluminum trialkyl or alkyl aluminum halide.

Abstract: A two-step method for washing textiles which comprises washing said textiles in a first step with an aqueous bath containing both a cationic surface-active agent and a non-ionogenic surface-active agent, and then washing said textiles in a second step with an aqueous bath containing conventional builders and an anionic surface-active agent, a non-ionogenic surface-active agent, or both.