US PATENT SUBCLASS 585 / 417-- .~.~.~ Using transition metal-containing catalyst

US PATENT SUBCLASS 585 / 417
.~.~.~ Using transition metal-containing catalyst

Current as of: June, 1999
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585 /	HD	CHEMISTRY OF HYDROCARBON COMPOUNDS

400	DF	AROMATIC COMPOUND SYNTHESIS {15}
407	DF	.~ By ring formation from nonring moiety, e.g., aromatization, etc. {7}
415	DF	.~.~ Product compound has more C atoms than feed compound, e.g., cyclic polymerization, etc. {2}
417		.~.~.~ Using transition metal-containing catalyst

DEFINITION

Classification: 585/417

Using transition metal-containing catalyst:

(under subclass 415) Subject matter wherein the reaction takes place in the presence of a catalyst containing a transition metal in free or combined form.

(1) Note. The transition metals are elements in which an inner electron shell, rather than an outer shell, is partially filled. In the periodic table they include elements 21 through 30 (scandium through zinc), 39 through 48 (yttrium through cadmium), 57 through 80 (lanthanum through mercury), and 89 through 103 (actinium through lawrencium).