Method for selectively separating used fragmented organic materials by means of dense aqueous suspensions

Method for selective separation by density of each constituent of a mix of organic synthetic materials to be reused by recycling, stable within a precision level of ±0.0005 about a density level (ds) chosen as the density separation threshold equal to at least 1, and comprising separating them by density difference, in an aqueous suspension of an appropriate quantity of powder particles dispersed in a sufficient quantity to create the density level (ds) chosen as the separation threshold of at least one of the constituents of the mix of synthetic organic materials to be selectively separated, wherein the separative suspension is formed from:

• a) solid powder particles with a size grading cutoff not more than 5 μm, these solid powder particles thus sized being dispersed in the aqueous phase in a sufficient quantity to reach the chosen density threshold (ds),
• b) a water soluble stabiliser to stabilise the rheological and invariance characteristics of the density (ds) with a precision of said density (ds) of the suspension of solid powder particles equal to ±0.0005.