| US 7,429,313 B2 | ||
| Method of producing electrostatically charged gelatin | ||
| Charles Lin, Decatur, Ala. (US); Jay Dahlgren, Madison, Ala. (US); Scott Morris, Chatham, N.J. (US); and Richard Thompson, New York, N.Y. (US) | ||
| Assigned to Del Monte Corporation, San Francisco, Calif. (US) | ||
| Filed on Apr. 29, 2004, as Appl. No. 10/834,684. | ||
| Application 10/834684 is a division of application No. 10/294274, filed on Nov. 14, 2002, granted, now 6,863,783. | ||
| Prior Publication US 2004/0204567 A1, Oct. 14, 2004 | ||
| Int. Cl. B01J 19/08 (2006.01) | ||
| U.S. Cl. 204—164 [361/226] | 23 Claims |
| 13. A method of forming electrostatically charged gelatin comprising the steps of:
(a) providing a collagen-containing raw material;
(b) forming an aqueous slurry with said raw material;
(c) forming a gelatin dispersion by extracting gelatin from said slurry;
(d) performing a first pH adjustment to adjust the pH of said gelatin dispersion to the isoelectric point of said gelatin;
(e) performing a second pH adjustment to adjust the pH of said gelatin dispersion from step (d) causing said gelatin to assume
an electrostatic charge; and
(f) applying a DC electric current to said gelatin dispersion from step (e).
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