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US 2006/0131235 A1Published application
Spiral-wound liquid membrane module for separation of fluids and gases
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorsRichard Offeman, George Robertson
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Abstract
The present invention is a filtering and chemical separation device that performs the operations of solvent extraction and pervaporation in a single piece of equipment, configured as a spiral-wound membrane module, and provides for the replenishment of the solvent in the supported liquid membrane while the module continues in operation. It provides a solution to the problem of separating miscible compounds efficiently and with low energy requirements.
Claims18
A device for separating chemicals comprising:
- a. a permeate collection tube, consisting of a hollow cylinder provided with at least one row of perforations oriented along the longitudinal axis of the cylinder;
- b. at least one membrane sandwich spirally-wound around the permeate collection tube;
- c. feed spacers interleaved with said membrane sandwich;
- and
- d. means to prevent direct mixing of feed retentate, permeate, and solvent.
2 more elements
Dependencies are inferred from the claim text.