Process for the removal of vinyl chloride from polyvinyl chloride latexes and slurries
AssigneeTenneco Chemicals, Inc.
InventorsDonald Goodman, Marvin Koral, Robert S. Miller, Robert J. Stanaback
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Abstract
Vinyl chloride is removed from polyvinyl chloride dispersions, latexes, and slurries by sparging them with an inorganic gas, such as air or ammonia, while they are maintained at subatmospheric pressure.
Claims1
The process for the removal of vinyl chloride from an aqueous dispersion, latex, or slurry that contains from about 1000 parts to 20,000 parts by weight of vinyl chloride per million parts by weight of said dispersion, latex, or slurry and from 5% to 50% by weight of a vinyl chloride polymer selected from the group consisting of polyvinyl chloride and copolymers of vinyl chloride and at least one monomer copolymerizable therewith that comprises maintaining the dispersion, latex, or slurry at subatmospheric pressure while sparging it with ammonia until the dispersion, latex, or slurry contains less than about 10 parts by weight of vinyl chloride per million part by weight of said vinyl chloride polymer.
Dependencies are inferred from the claim text.