US PATENT SUBCLASS 585 / 412
.~.~ Plural stage, with moving catalyst or with specified flow rate or procedure


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



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}
412.~.~ Plural stage, with moving catalyst or with specified flow rate or procedure


DEFINITION

Classification: 585/412

Plural stage, with moving catalyst or with specified flow rate or procedure:

(under subclass 407) Subject matter wherein the synthesis is accomplished in two or more steps, wherein the catalyst employed is claimed as moving, e.g., from reactor to regenerator, fluidized, etc., wherein a flow procedure in the reactor, e.g., countercurrent, etc., is claimed, or wherein a flow rate, e.g., space velocity of reactant, etc., is claimed.

(1) Note. A mere time span during which the desired reaction takes place is not sufficient for classification in this subclass.