During styrene production, controlling polymerization minimizes fouling and monomer loss and protects the unit during an emergency shutdown. Historically, slow-reacting, highly toxic dinitrophenols have been widely used by the industry to control polymerization. Nalco Champion provides greatly improved polymerization control technology for the styrene industry through its innovative PRISM™ programme.
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Nalco Champion addresses styrene polymerization with customized programs specifically targeting areas of the plant where polymerization control is required.
True Inhibitors We offer the most cost-effective, optimized polymerization control for back end distillation, vent gas compressor and after reactor cooling areas. Our inhibitors are by far the fastest inhibitors on the market, insuring the lowest polymer generation. In the back end of the unit, we pair our inhibitor with a slower reacting polymer retarder to deliver optimal polymer control during normal production (through inhibitor) and adequate unit protection during an emergency shutdown (through retarder). Our programs are time tested and proven. We treat all technology licensees around the world.
Green Retarders The best practice for back end (distillation area) polymer control is the use of a combination true inhibitor plus a retarder. Extremely toxic dinitrophenols, including the DNBP (2,4-dnitro-6-sec butyl phenol), and the DNOC (di-nitro-ortho-cresol), are common retarders. Their oral LD50 values are:
Product Oral LD50 - Rat (mg/kg)
As the industry sets higher safety and environmental standards, the market needs safer, less toxic alternatives. Nalco Champion responded with Green Retarder technology to replace highly toxic retarders. With an Oral LD50 number greater than 2000 mg/kg, this safer, environmentally friendly alternative has been successfully implemented globally at styrene plants of all major licensed technologies. To ensure adequate plant protection during an emergency shutdown, Nalco Champion provides a proprietary test procedure to estimate the available protection time at a given dosage.
3D TRASAR™ for Monomers Nalco Champion pioneered the technology for monitoring inhibitor residuals in the monomers production process, including styrene. This technology improves plant operational reliability by offering in situ monitoring of chemical consumption 24/7.