Resol beads, methods of making them, and methods of using them
OwnerChester Wayne Sink, Charles Edwan Sumner +5inventors
InventorsChester Wayne Sink, Charles Edwan Sumner, Ramesh Chand Munjal, Ruairi Seosamh O'Meadhra, Jerry Steven Fauver, Robert Melvin Schisla, Shriram Bagrodia
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Abstract
Resol beads are disclosed prepared by reaction of a phenol with an aldehyde, with a base as catalyst, in the presence of 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.
Claims88
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.
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 within a desired particle size range in or to the aqueous dispersion of resol beads.
Resol beads made by a 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.
Resol beads made by a 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 within a desired particle size range in or to the aqueous dispersion of resol beads.
Dependencies are inferred from the claim text.