Chemistry of hydrocarbon compounds – Aromatic compound synthesis – From nonhydrocarbon feed
Reexamination Certificate
2006-08-29
2006-08-29
Dang, Thuan D (Department: 1764)
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
From nonhydrocarbon feed
Reexamination Certificate
active
07098371
ABSTRACT:
Method of hydrodechlorinating nuclear-chlorinated o-xylenes and recovering o-xylene, forming hydrogen chloride, the nuclear-chlorinated o-xylenes being hydrogenated in the gas phase at a noble-metal-containing catalyst at a temperature in the range from 220 to 360° C. The catalyst preferably comprises palladium or platinum, in particular supported palladium or platinum. The nuclear-chlorinated o-xylenes can be used individually or as mixtures.
REFERENCES:
patent: 3493626 (1970-02-01), Zorn et al.
patent: 4190609 (1980-02-01), Lin
patent: 4289916 (1981-09-01), Nakayama et al.
patent: 4444983 (1984-04-01), Hattori et al.
patent: 4647709 (1987-03-01), Wolfram
patent: 5177268 (1993-01-01), Balko et al.
patent: 5552549 (1996-09-01), Rasp et al.
patent: 5625110 (1997-04-01), Schoedel et al.
patent: 2002/0049357 (2002-04-01), Mais
patent: 0 126 669 (1984-11-01), None
patent: 0 173 222 (1986-03-01), None
patent: WO 02/14245 (2002-02-01), None
Miroslav Uhlir, et al. “Catalytic Hydrogenolysis of bexachlorobenzene to lower-chlorinated benzenes”, Chemical Abstracts, 114:121703n, 1991.
English abstract for EP 0126669, Nov. 28, 1984.
Helmut Zahn et al., “DL-hydroxylysim und DL-allohydroxylysin und ihre lactone”, Chemische Berichte Jahrg. 91, 1958, pp. 1359-1379.
Ullman's Encylopadia of Industrial Chemistry, 5th edition, vol. A8, pp. 211-215.
“Selective para chlorination of o-Xylene over zeolite catalysts”, Journal of Catalysis, 150, 1994, pp. 430-433.
Sudip Mukhopadhyay et al., “Palladium-catalyzed Aryl-Aryl coupling in water using molecular hydrogen: kinetics and process optimization of a solid-liquid-gas system”, Tetrahedron, 55, 1999, pp. 14763-14768.
Chemical abstract, CA 1998, Nr. 472737.
Chemical abstract, CA 1991, Nr. 514135.
Decker Daniel
Mack Karl-Ernst
Clarient GmbH
Dang Thuan D
Silverman Richard P.
LandOfFree
Method of hydrodechlorinating nuclear-chlorinated ortho-xylenes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of hydrodechlorinating nuclear-chlorinated ortho-xylenes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of hydrodechlorinating nuclear-chlorinated ortho-xylenes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3664746