Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By addition of extraneous agent – e.g. – solvent – etc.
Patent
1994-02-28
1995-05-09
McFarlane, Anthony
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By addition of extraneous agent, e.g., solvent, etc.
585868, 528500, C07C 710, C07C 700, C08F 600
Patent
active
054141931
ABSTRACT:
A process for removing volatile constituents from a polymer dispersion or solution by stripping with a carrier gas is disclosed. The carrier gas being, in the case of a polymer solution, the vapor of the solvent used for the polymer solution as an inert gas saturated with said vapor. In the case of a polymer dispersion, the vapor of the dispersing medium used for the polymer dispersion or an inert gas saturated with said vapor. In both processes certain amount of the carrier gas is passed through the polymer dispersion or solution, the volatile constituents taken up the carrier gas on passage through the polymer dispersion or solution are then removed from the carrier gas in such a manner that the energy content of the carrier gas remains essentially unchanged. The carrier gas thus obtained is then reused for further removal of volatile constituents from the same polymer dispersion or solution by stripping.
REFERENCES:
patent: 3930931 (1976-01-01), Baughman
patent: 4182854 (1980-01-01), Hozumi et al.
Bapat Ajay V.
Taylor Michael A.
BASF Corporation
Chipaloski Michael R.
McFarlane Anthony
Phau Nhat D.
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