Liquid purification or separation – Processes – Chromatography
Reexamination Certificate
2004-11-09
2010-06-01
Drodge, Joseph W (Department: 1797)
Liquid purification or separation
Processes
Chromatography
C585S350000, C585S800000, C585S820000, C585S823000, C585S006300, C252S570000
Reexamination Certificate
active
07727401
ABSTRACT:
A process for purifying monoterpenes, including the steps of: providing a monoterpene comprising alpha terpinene of about90% or greater purity and comprising an oxygen-containing impurity compound selected from the group consisting of1,8-cineole,1,4,-cineole, and mixtures thereof; providing an activated silica gel preparative chromatographic column; contacting the monoterpene with the column, wherein the oxygen-containing impurity compounds are retained on the column; recovering monterpenes depleted of oxygen-containing impurity compounds from the column by applying a pressure above atmospheric from a gas source without the use of a solvent; and removing the oxygen-containing impurity compounds by contacting the column with an alcohol.
REFERENCES:
patent: 2316299 (1943-04-01), Thompson
patent: 2585492 (1952-02-01), Olsen
patent: 2723756 (1955-11-01), Miller et al.
patent: 2930821 (1960-03-01), Schwoegler et al.
patent: 3305591 (1967-02-01), Epstein et al.
patent: 3546256 (1970-12-01), Zimmerman
patent: 3558732 (1971-01-01), Neuzil
patent: 3625733 (1971-12-01), Mansur et al.
patent: 3723302 (1973-03-01), Pharis et al.
patent: 3778486 (1973-12-01), Hamby, Jr.
patent: 3846297 (1974-11-01), Thaw
patent: 3869067 (1975-03-01), Ashmead et al.
patent: 4197328 (1980-04-01), Sprecker et al.
patent: 5061502 (1991-10-01), Cully et al.
patent: 5847246 (1998-12-01), Hsu et al.
patent: 6086782 (2000-07-01), Hsu et al.
patent: 6447816 (2002-09-01), Vail et al.
patent: 6572905 (2003-06-01), Zeller et al.
patent: 6689398 (2004-02-01), Haridas et al.
patent: 6974552 (2005-12-01), Hsu et al.
patent: 7150888 (2006-12-01), Vail et al.
patent: 2005/0161060 (2005-07-01), Johnson et al.
patent: 0979806 (2000-02-01), None
patent: 1332201 (2003-08-01), None
patent: 1354980 (2003-10-01), None
patent: 194286 (1924-06-01), None
patent: 02/49450 (2002-06-01), None
Greg Swords and G. L. K. Hunter, Composition of Austrailian Tea Tree Oil (Melaleuca alternifolia), 1978 American Chemical Society, vol. 26, No. 3 1978, pp. 734-737, Corporate Research & Development Department, The Coca Cola Company, Atlanta, Georgia 30301. Downloaded from the Internet on Jun. 18, 2009.
Z. Shen, et al; “Use of Adsorbent and Supercritical Carbon Dioxide to Concentrate Flavor Compounds from Orange Oil”; J. Agric. Food Chem.; vol. 50, No. 1; 2002; pp. 154-160; XP002421547.
Schefflre, et al; “Improved Gas Chromatographic Analysis of Naturally Occurring Oxygen-Containing Monoterpenese Following Prefractionation by Liquid-Solid Chromatography”; Chromatographia; vol. 10, No. 11; 1977; pp. 669-677; XP009079501.
Masaki Sato, et al, “Adsorption Process for the Fractionation of Citrus Oil by . . . ”, Conf. of Fundamentals of Adsorption, Kluwer Aca. Pub., Boston, MA, 1996, p. 797-804.
Teris A. Van Beek, et al, “Sample Preparation of Standardized Extracts of . . . ” Phytochemical Analysis, vol. 7, 1996, p. 185-191.
Vasant D. Deo, et al, “Column Chromatographic Technique For Extra Pure . . . ”, Jour. Indian Perfumer 35 (1), 1991, p. 22-23.
J.J.C. Scheffer, et al, “Improved Gas Chromatographic Analysis of Naturally . . . ”, Chromatographia, vol. 10, No. II, 1977, p. 669-677.
The Chemical Society of Japan (ed.), “The Fourth Series of Experimental Chemistry, vol. 1, Basic Operation I”, Maruzen, pp. 293-299 (1990).
Air Products and Chemicals Inc.
Drodge Joseph W
Morris-Oskanian Rosaleen P.
LandOfFree
Selective purification of mono-terpenes for removal of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Selective purification of mono-terpenes for removal of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Selective purification of mono-terpenes for removal of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4208434