VinyLoop

VinyLoop is a proprietary physical plastic recycling process for polyvinyl chloride (PVC). It is based on dissolution in order to separate PVC from other materials or impurities.^[1]

A major factor of the recycling of polyvinyl chloride waste is the purity of the recycled material. In most composite materials, PVC is among several other materials, such as wood, metal, or textile. To make new products from the recycled PVC, it is necessary to separate it from other materials. Traditional recycling methods are not sufficient and expensive because this separation has to be done manually and product by product.^[2]

VinyLoop is a recycling process which separates PVC from other materials through a process of dissolution, filtration and separation of contamination. A solvent is used in a closed loop to elute PVC from the waste. This makes it possible to recycle composite structure PVC waste, which would normally be incinerated or put in a landfill site.^[3]

The process consists of the following steps:

1. Pre-treatment: waste plastics are cleaned, ground and mixed
2. Dissolution: a specific solvent is used to selectively dissolve the PVC compound in a closed loop
3. Filtration: impurities which have not been dissolved are removed through filtration—they are separated by type of material by filtration, centrifugation and decantation. After separation, the secondary materials are washed with pure solvent to dissolve all remaining PVC compounds
4. Precipitation of the regenerated PVC compound: the solution of PVC is recovered in a precipitation tank, where steam is injected to evaporate the solvent and precipitate the PVC. The PVC compound is separated in the form of aqueous effluent.^[4][5] and dried.
5. Drying: after recovering the excess water from the slurry, the wet PVC goes to a dryer.

Possible products made from recycled PVC are coatings for waterproofing membranes, pond foils, shoe soles, hoses, diaphragms tunnel, coated fabrics, and PVC sheets. It is an attempt to solve the recycling waste problem of PVC products.^[6][7][8]

VinyLoop-based recycled PVC's primary energy demand is 46 percent lower than conventional produced PVC. The global warming potential is 39 percent lower.^[9]

El proceso VinyLoop ha sido seleccionado para reciclar las membranas de diferentes sedes temporales de los Juegos Olímpicos de Londres 2012. Las cubiertas del Estadio Olímpico , el Estadio de Waterpolo , el Centro Acuático de Londres y el Cuartel de la Artillería Real serán desmontadas y una parte se reciclará mediante el proceso VinyLoop. ^{[ 10 ]}

Dado que el proceso no podía eliminar los plastificantes de ftalato de bajo peso molecular durante el reciclaje, el endurecimiento de las regulaciones de la UE provocó el cierre de la planta de reciclaje ubicada en Ferrara, Italia, el 28 de junio de 2018. ^{[ 11 ]}

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