<%@LANGUAGE="JAVASCRIPT" CODEPAGE="1252"%> Sustainable development
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Sustainable PVC Commitment to sustainability PVC recycling Eco-manufacture

 

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Feedstock recycling

 

The raw materials that go onto the production of PVC are called 'feedstocks'.

Some products contain different materials bonded together. These composite materials cannot be easily separated. To recycle them, they are first chemically broken down into their basic compounds. These can then be used as the raw materials for the production of new polymers or in other processes.

Feedstock recycling helps to turn PVC manufacture into a 'closed loop process'.

PVC polymer

PVC is a polymer that contains many useful molecules and atoms.

PVC pyrolysis

Useful feedstocks can be recovered from PVC waste.

Several different processes are being developed. They break the PVC down by using high temperatures and pressures.

 

Roll over the temperature scale to see the
molecules produced at different temperatures.

 

Pyrolysis temperature scale

250 - 600oC

 

Adding Sodium hydroxide (NaOH) and heating to 250oC splits off chlorine atoms from the PVC waste. This is called hydrolysis.

It forms sodium chloride, or salt (NaCl) which can be used in many other processes such as generating chlorine for the production of new PVC.

Sodium Chloride
(NaCl)

At 600oC, the PVC chains break down. This releases useful hydrocarbons that can be used instead of oil or gas to make new plastics.

Hydrocarbons