Solvay (societe Anonyme)

Solvay Sa

Solvay & Cie

Solvay Polyolefins Eurpoe--belgium (societe Anonyme)

Jean-Marie Yernaux

Bernard Vandenhende

James Franklin

Etienne Hannecart

Rene Walraevens

Jean-Jacques Robin

Valerie Bromont

Frank Devlieghere

Rene Wairaevens

Jacques Scheffer

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 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.

Process for separating the constituents of a mutlilayer material

1-Chloro-1,1-difluoroethane is prepared by reacting hydrogen fluoride with vinylidene chloride, in a liquid medium containing preferably at least 40 mol % 1,1-dichloro-1-fluoroethane.

Process for the manufacture of 1-chloro-1,1-difluoroethane

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Rixensart, Belgium

Jean-Marie Yernaux