ABSTRACT

The liquid mixture enters a second separator where the pressure is reduced and dissolved gases released. These gases are fed into a distillation column where vinyl acetate is separated from light ends, mainly acetaldehyde. Ethylene has become the preferred feedstock for the manufacture of vinyl acetate, largely replacing the earlier acetylene-based processes. In the US and Europe vinyl acetate’s main outlet, accounting for 60% of consumption, is for the manufacture of polyvinyl acetate thermoplastic polymers and copolymers. Vinyl acetate-vinyl chloride copolymers find outlets in the manufacture of transparent film, flooring, tubing and gramophone records. Vinyl acetate is also used as a chewing gum base, and ethylene-vinyl acetate copolymers have replaced natural starches and glues for bookbinding and packaging. Vinyl acetate vapour is irritating to the eyes and high concentrations cause dizziness and drowsiness. Vinyl acetate is a dangerous fire and explosion hazard because it will polymerize violently when exposed to heat.