流動床法オキシクロリネ-ションによるEDC製造 (新製品・新プロセス開発の背景特集号)

概要

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Oxychlorination is the key reaction for the manufacture of vinyl chloride monomer (VCM) starting from ethylene. Research and development of the Mitsui Toatsu Chemicals' oxychlorination process is described. Characteristic features are "Fluidized-bed reactor" and "Oxygen based total recycle gas system". The fluidized-bed technology using the catalyst, prepared by mixed-gel process, with high performance and selectivity for EDC, enables efficient heat-removal and use of oxygen, not air, which in turn realizes the excess ethylene recycling process, compact facilities and low investment cost. The operation is run within non-flammable region throughout the reaction and after-treatment, so the process is highly safe though pure oxygen is used as the oxidant. The process is almost care-free for pollution problem because of the negligibly small amount of off-gas compared with the air-based process. Processes for producing VCM other than Mitsui Toatsu Chemicals' are also outlined.
社団法人有機合成化学協会の論文