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Technology Profile: Polyoxymethylene Production

By Intratec Solutions |

This column is based on “Polyoxymethylene from Methanol and Acetic Anhydride – Cost Analysis,” a report published by Intratec. It can be found at: www.intratec.us/analysis/polyoxymethylene-production-cost. Polyoxymethylene (also known as POM and polyacetal resin) is a thermoplastic polymer fiber. Owing to its crystalline structure, consisting of organized stacking chains, POM has high strength, stability, stiffness and hardness, as well as low friction. These characteristics, combined with chemical resistance and excellent dimensional stability, make the polymer a common substitute for metal. It is widely used in the manufacturing of high-performance engineering materials and electronics. The process The process examined here (Figure 1) is a conventional silver-catalyzed process with a methanol recycle, combined with a polymerization process. It consists of three major sections: (1) partial oxidation; (2) formaldehyde purification; and (3) polymerization. Figure 1. The diagram shows the production of polyoxymethylene, a thermoplastic fiber[/caption] Partial oxidation. Fresh methanol and air are fed to an evaporator, and the resulting vapor is mixed with steam and sent to a reactor, where the methanol is partially oxidized…
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