Solvay (societe Anonyme)

Solvay Polyolefins Eurpoe--belgium (societe Anonyme)

Bernard Vandenhende

Jean-Marie Yernaux

Eric Fassiau

Etienne Hannecart

Jean-Jacques Robin

Jean-Christophe Lepers

Valerie Bromont

Jean-Raphael Caille

Jacques Scheffer

Jean-Philippe Dumont

Frank Devlieghere

Method for purifying a solution of at least one plastic in a solvent, the said solution comprising insolubles, whereby the solution is purified using a centrifugal settler.

Method for purifying a plastic solution

Method for recovering a polymer from a liquid medium () substantially containing the polymer and a solvent for the latter, wherein:

Method for recovering a polymer from a liquid medium

Process for the solvent treatment of a plastic, by dissolving the plastic with a solvent and with at least one phase separation agent compatible with the solvent to form a solution, precipitating the plastic by contacting the solution with at least one non-solvent so as to obtain a solvent/non solvent mixture containing precipitated plastic particles, and substantially eliminating the solvent from the mixture and recovering solid plastic particles. After dissolution but before substantially eliminating the solvent a stripping takes place during which at least a substantial portion of the PSA is removed from the solution or from the mixture using a stripping composition.

Process for the solvent treatment of a plastic

Process for recycling an article based on at least one vinyl chloride or vinylidene chloride polymer, according to which:

Method for recycling vinyl polymer-based articles

Process for recycling a plastic, according to which the plastic is brought into contact with a solvent capable of dissolving the same and the plastic dissolved in the solvent is precipitated using a non-solvent in the presence of a phase-separating agent, in which the phase-separating agent is compatible with the solvent and incompatible with the non-solvent, and is also present when the plastic is brought into contact with the solvent, and improves the dissolution of the plastic by the solvent.

Method for recycling a plastic material

Process for recycling articles based on vinyl chloride polymers

Process for the treatment of ground polyolefin material originating from scrap dairy product containers with at least one agent chosen from hydrogen peroxide, steam and sodium hydroxide in a quantity which is effective for deodorizing the polyolefin. Ground material obtained by this process and exhibiting an imperceptible level of residual odour of aged milk. Use of the deodorized ground material obtained by this process for the production of shaped objects.

Process for the treatment of ground polyolefin material, ground material

Process for separating the constituents of a multilayer material including at least one layer of a base plastic (A) and a layer of a plastic (B) which are separated by a layer of adhesive plastic (C), in which: (1) the material is heated to a temperature T1 between the crystallization temperature of the plastic B (Tc) and Tc--20.degree. C., (2) the material is next shredded by being subjected to shearing, at approximately the same temperature, so as to produce delamination and thus to convert the material into particles of small dimensions of two types, some (X) consisting essentially of base plastic (A) and others (Y) consisting essentially of plastic B and of adhesive plastic (C), and (3) the particles X and Y are subsequently separated by electrostatic separation.

Growing community of inventors

Leest, Belgium

Bernard Vandenhende