Norman Neil Swanson

US Patent:

45684189, Feb 4, 1986

Filed:

Nov 22, 1982

Appl. No.:

6/443256

Inventors:

Lee E. Walko - Lake Jackson TX
Stephen B. Wallace - Lake Jackson TX
Norman Swanson - Lake Jackson TX
Roy M. Cook - Angleton TX

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

B01D 118

US Classification:

159481

Abstract:

Thermoplastic polymer solutions in organic solvents are converted to granules of relatively uniform sizes and a narrow distribution range by passing the polymer solution through a jet nozzle to form a high velocity stream, injecting super heated steam into the high velocity stream to form a suspension of fine polymer particulates in a gas stream, passing the particulates into a heated agglomeration tube having a series of adjoining circular turns of at least 180. degree. wherein the particulates are substantially completely agglomerated into granules and the granules are recovered from the gas stream.