Abstract: A stent has a center length section, two end sections, and an elastically deformable woven wire mesh, which enables the stent to expand from a small diameter to a larger diameter, with the diameter of the end sections being larger than in the center length section in the expanded state. The wire extends in a zig-zag manner from an outer end of one end section toward the outer end of the other end section, and back in a zig-zag manner to the one end section. The peripheral direction of the woven wire changes at the transition from an end section to the center length section, such that the wire intersects on the return path to the one end section in the center length section and overall forms an 8-shaped loop having two closed eyes, wherein a plurality of interconnected loops are arranged offset to each other over the circumference.

Abstract: A process for the continuous manufacture of carboxylic chlorides (I) of the general formula R-COCl, in which R stands for a C-organic radical containing from 1 to 30 C atoms, by the reaction of a carboxylic acid (II) with a reaction product (III) of phosgene (IV) and an N,N-substituted formamide (V), in which compounds II and III are passed in parallel flow upwardly into a zone, filled with compound III, in a reactor (1), the reaction mixture is allowed to rise in predominantly laminar flow, such that phase separation occurs to give a top I-phase and a bottom phase III' mainly comprising compound III and formamide formed and compound I is removed from the top phase and also portions of the bottom phase III' are removed at the rate at which they are formed.

Abstract: A continuous process for purifying an off-gas which contains CO.sub.2 and HCl and COCl.sub.2. The process comprises passing the off-gas through a separator filled with N,N-dialkylformamide and HCl. This causes a reaction between the COCl.sub.2 and the N,N-dialkylformamide to give the Vilsmeier complex (adduct of COCl.sub.2 and dialkylformamide) and CO.sub.2. The CO.sub.2 leaving the separator contains small amounts of HCl.

Abstract: A process for preparing carbonyl chlorides of the formula I ##STR1## where R is C.sub.1 -C.sub.30 -alkyl, C.sub.2 -C.sub.30 -alkenyl or C.sub.2 -C.sub.30 -alkynyl, from essentially equimolar amounts of a carboxylic acid of the formula II ##STR2## where R has the abovementioned meanings, and phosgene COCl.sub.2 (III), in the presence of a catalytic adduct of phosgene and N,N-disubstituted formamide or the hydrochlorides thereof, of the formula IV where R.sup.1 and R.sup.2 are each, independently of one another, C.sub.1 -C.sub.3 -alkyl or together are a C.sub.4 -C.sub.5 -alkylene chain which may be interrupted by oxygen or by nitrogen which carries C.sub.1 -C.sub.3 -alkyl or CHO, and n is 0, 1 or 2, wherein the reaction is carried out with a stationary phase of the catalytic adduct, is described.

Abstract: Stabilized aqueous C.sub.14 -C.sub.22 -alkyldiketene emulsions containing, as essential components:(a) from 10 to 60% w/w of at least one C.sub.14 -C.sub.22 -alkyldiketene,(b) from 1 to 10% w/w of at least one protective colloid and(c) from 0.1 to 20% w/w of at least one ester of formula I ##STR1## in which R.sup.1 and R.sup.2 each denote C.sub.14 -C.sub.22 -alkyl, R.sup.1 differing in this case from R.sup.2 by at least 4 carbon atoms in the alkyl chain, and/or the same or different C.sub.14 -C.sub.22 -alkenyl groups, or at least one ester of the formula R.sup.3 --O--CO--O--R.sup.4 (II), in which R.sup.3 and R.sup.4 are alkyl or alkenyl radicals of from 2 to 22 carbon atoms or at least one urethane of formula III ##STR2## in which R.sup.5, R.sup.6 and R.sup.7 are the same or different alkyl or alkenyl radicals of from 2 to 22 carbon atoms and one of the substituents R.sup.5, R.sup.6 and R.sup.