Abstract: The invention relates to a process for recovering monomeric units of a nylon from carpet material. The carpet material includes fibres containing nylon bound to a backing containing one or more non-nylon components. The carpet material contains between 15 and 35 wt. % of the nylon. The process includes: a) mechanically separating the carpet material into an enriched carpet mixture containing between 35 and 55 wt. % of said nylon and into a depleted carpet mixture having a lower content of nylon than the carpet material; and b) exposing the enriched carpet mixture to conditions at which depolymerization of the nylon is effected.

Abstract: The invention relates to a process for recovering monomeric units of a nylon from carpet material, said carpet material comprising fibres containing said nylon bound to a backing containing one or more non-nylon components, the carpet material containing between 15 and 35 wt.

Abstract: Method for preparing a concrete mortar which contains a fraction of inorganic grains having a diameter <500 &mgr;m, wherein the fraction containing the inorganic grains is added in the form of a granular material which contains the inorganic grains which, with the aid of a water-soluble polymer, are bound so as to form the granular material. As a result, a homogeneous mortar is obtained.