Polyvinyl chloride (PVC) is everywhere in modern society. From gutters on your house to heavy duty industrial pipes, it plays a vital role in your everyday life.

PVC is most often produced with the help of an organic peroxide initiator and since Nouryon is the world's largest producer of organic peroxides, the company is an integral player in the PVC industry.

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Building on its extensive know-how the PVC technical team of Nouryon has turned an old dream of the industry into reality: continuously and controlled charging of the initiator (Continuous Initiator Dosing or CiD) to fully control and optimize the vinylchloride polymerization reaction. Thus economic, operational, quality, safety and environmental advantages are brought to the industry.

PVC is the third most widely produced plastic in the world, with annual production of approximately 34 million tons.

Several inventions had to be brought together to make CiD a success:

  • Development of Trigonox 187, an ‘extremely fast’ initiator that is fast enough for use in Continuous Imitator Dosing.
  • Turning the reactor control system upside down to enable the use of all latent production capacity.
  • Formulation of Trigonox 187 into an easy and safe to handle water based emulsion enabling bulk handling.
  • Development of an economically feasible peroxide production.
  • Development of an integrated transport, storage, control and dosing system for the initiator that can be bolted onto any existing PVC plant.

Also, Nouryon has built several CiD demonstration units to facilitate the introduction at customers’ sites. These demo units can show the viability of CiD introduction by running multiple batches on one or multiple reactors under supervision of Nouryon experts in close cooperation with customers’ operational teams.

CiD has already been introduced at six customers worldwide with a number of trials ongoing. This experience has shown that the use of our CiD technology can bring the following benefits:

  • Approximately 20-40% more PVC production capacity with significant savings in capital investments in addition with large timing advantage compared with installation of new reactors.
  • Energy saving and CO2 reduction by switching from chilled water to cooling tower water without productivity loss.
  • Increased PVC product quality (e.g. PVC whiteness, reduction in fish eyes).
  • Increased safety of plant operation due to less run away reactions (e.g. in case of power outage.
  • Increased safety to employees due to reduced manual handling.
  • Improved plant operations as PVC reactors and downstream units can be operated more efficiently with CiD.

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