Abstract: The invention relates to a process for the production of polymer fibers from polymers dissolved in ionic liquids by means of an air gap spinning process, characterized in that a) a spinning solution that contains an ionic liquid and a dissolved polymer is produced; b) said spinning solution is guided through an extruder before it is divided into fibers via a die; and c) the obtained fibers are guided via an air gap through a coagulation bath.

Abstract: Method for the production of cellulose yarns from recycling cellulose material, wherein the method includes the following steps: (a) dissolution of the recycling cellulose material in a molten ionic liquid; (b) adapting the conditions such that active substances dissolved or dispersed in the molten ionic liquid or generated in situ in the molten ionic liquid act to degrade non-cellulose material initially contained in the recycling cellulose material and contained in the molten ionic liquid due to the dissolution of the recycling cellulose material, wherein the active substances can already be present during (a) or can be added after (a) and before or during (b).

Abstract: The invention relates to a method of producing a carbon-ceramic shaped body comprising a carbon fibre-reinforced carbon matrix and a content of silicon carbide and silicon, characterised in that a carbonisable shaped body having an organic matrix based on cellulose and reinforced with carbonisable textile structures has been carbonised to form a porous shaped body and the porous carbonised shaped body is then subjected to a liquid silicisation to give the carbon-ceramic shaped body. This method is performable in an economically advantageously manner without losing the beneficial properties achievable according to the prior art.

Abstract: A description is given of continuous fibers based on cellulose and/or cellulose derivatives, more particularly for producing flame-retardant textiles or carbon fibers. The cellulose and/or the cellulose derivatives are in a dehydrated form in the continuous fibers. The oxygen content is 29 to 39 wt %, the limiting oxygen index LOI is 25 to 40 (according to DIN EN ISO 6941; 2004-05) and the density is 1.3 to 1.45 g/cm3 (according to DIN 65569-1; 1992-10). The continuous fibers may be produced advantageously by impregnating the starting fibers with a solution, more particularly an aqueous solution, of a specific salt which under thermal conditions releases a dehydrating acid which brings about the dehydration of cellulose and/or of cellulose derivatives in a subsequent thermal stage. The continuous fibers of the invention can be used in particular to produce advantageous carbon fibers.