Manual of U.S. Patent Classification
as of June 30, 2000

Class
518
CHEMISTRY: FISCHER-TROPSCH PROCESSES; OR PURIFICATION OR RECOVERY OF PRODUCTS THEREOF

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Subclass definitions may be accessed by clicking on the subclass number, below.

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Subclass		Title
ClassTitle		===> CHEMISTRY: FISCHER-TROPSCH PROCESSES; OR PURIFICATION OR RECOVERY OF PRODUCTS THEREOF
700		LIQUID PHASE FISCHER-TROPSCH REACTION
701		. Rhodium containing catalyst utilized
702		WITH PRELIMINARY REACTION TO FORM HYDROGEN OR A CARBON OXIDE
703		. Gaseous oxygen utilized in the preliminary reaction
704		. Water utilized in the preliminary reaction
705		TREATMENT OF FEED OR RECYCLE STREAM
706		PLURAL ZONES EACH HAVING A FISCHER-TROPSCH REACTION
707		. Diverse catalysts utilized in at least two zones
708		. Water utilized
709		INCLUDING REGENERATION OF CATALYST
710		. Solvent utilized
711		WATER UTILIZED DURING THE FISCHER-TROPSCH STEP OF THE PROCESS
712		TEMPERATURE CONTROL OR REGULATION OF THE FISCHER-TROPSCH REACTION
713		GROUP IB METAL CONTAINING CATALYST UTILIZED FOR THE FISCHER-TROPSCH REACTION (i.e., Cu, Ag, or Au)
714		GROUP VIB METAL CONTAINING CATALYST UTILIZED FOR THE FISCHER-TROPSCH REACTION (i.e., Cr, Mo, or W)
715		GROUP VIII METAL CONTAINING CATALYST UTILIZED FOR THE FISCHER-TROPSCH REACTION (i.e., Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, or Pt)
716		. Rhodium containing catalyst
717		. Group IA or IIA light metal containing material utilized during the Fischer Tropsch step of the process (i.e., Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, or Ba)
718		. . In the form of a salt
719		. Iron containing catalyst
720		. . Pretreatment of the catalyst
721		. . The catalyst contains a metal in addition to the iron, or another material utilized contains a metal other than iron (e.g., as a promoter, retarder, etc.)
722		ADSORPTION WITH A SOLID MATERIAL
723		SALT CONTAINING EXTRACTANT UTILIZED
724		SOLVENT EXTRACTION UTILIZED
725		. Alcohol containing extractant utilized
726		HYDROGENATION WITH GASEOUS HYDROGEN TO PURIFY OR RECOVER
727		FORMING SALTS OR OXIMES OF OXYGEN CONTAINING COMPOUNDS TO PURIFY OR RECOVER
728		MISCELLANEOUS

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Last Modified: 6 October 2000