Back to results
US 8,557,381 B2Granted
Resol beads, methods of making them, and methods of using them
AssigneeEastman Chemical Company
InventorsCharles Edwan Sumner, Ramesh Chand Munjal, Ruairi Seosamh O'Meadhra, Chester Wayne Sink, Jerry Steven Fauver, Robert Melvin Schisla, Shriram Bagrodia, Spencer Erich Hochstetler, Tera Jill Hardin
Life of this patent
Estimating the term…
Abstract
Resol beads are disclosed that are prepared in high yield by reaction of a phenol with an aldehyde, with a base as catalyst, a colloidal stabilizer, and optionally a surfactant. The resol beads have a variety of uses, and may be thermally treated and carbonized to obtain activated carbon beads.
Claims15
A process for producing resol beads, the process comprising:
- a) reacting a phenol with an aldehyde in the presence of a base as catalyst, in an agitated aqueous medium that comprises a colloidal stabilizer, and optionally a surfactant, for a period of time and at a temperature sufficient to produce an aqueous dispersion of resol beads;
- b) recovering water-insoluble resol beads above a minimum particle size from the aqueous dispersion;
- and
- c) retaining or recycling beads below the minimum particle size in or to the aqueous dispersion of resol beads.
1 more element
Dependencies are inferred from the claim text.