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

700	LIQUID PHASE FISCHER-TROPSCH REACTION:

	This subclass is indented under the class definition. Processes wherein the Fischer-Tropsch reaction is carried out in the liquid state.

701	. Rhodium containing catalyst utilized:

	This subclass is indented under subclass 700. Processes wherein a catalyst containing rhodium is utilized for the Fischer-Tropsch reaction.

702	WITH PRELIMINARY REACTION TO FORM HYDROGEN OR A CARBON OXIDE:

	This subclass is indented under the class definition. Processes which include a reaction to form hydrogen or a carbon oxide prior to the Fischer-Tropsch reaction.

703	. Gaseous oxygen utilized in the preliminary reaction:

	This subclass is indented under subclass 702. Processes wherein gaseous oxygen is utilized in the preliminary reaction.

704	. Water utilized in the preliminary reaction

	This subclass is indented under subclass 702. Water utilized in the preliminary reaction: Processes wherein water is utilized in the preliminary reaction.

705	TREATMENT OF FEED OR RECYCLE STREAM:

	This subclass is indented under the class definition. Processes wherein at least one reactant is treated prior to the Fischer-Tropsch reaction, such as removing sulfur therefrom, or processes wherein the recycle stream is treated prior to returning to the reaction zone.

706	PLURAL ZONES EACH HAVING A FISCHER-TROPSCH REACTION:

	This subclass is indented under the class definition. Processes wherein Fischer-Tropsch reactions take place in two or more reaction zones.

707	. Diverse catalysts utilized in at least two zones:

	This subclass is indented under subclass 706. Processes wherein different catalysts are utilized in at least two of the zones.

708	. Water utilized:

	This subclass is indented under subclass 706. Processes wherein water is utilized in at least one of the zones.

709	INCLUDING REGENERATION OF CATALYST:

This subclass is indented under the class definition. Processes wherein a catalyst, after utilization, is recycled for reuse.

SEE OR SEARCH CLASS:

502,	Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making, especially subclasses 20+ for a process, per se, of regenerating a catalyst.

710	. Solvent utilized:

	This subclass is indented under subclass 709. Processes wherein a solvent is utilized in the regeneration of a catalyst.

711	WATER UTILIZED DURING THE FISCHER-TROPSCH STEP OF THE PROCESS:

This subclass is indented under the class definition. Processes wherein water is utilized in the Fischer-Tropsch step of the process.

(1) Note. The water may or may not react.

712	TEMPERATURE CONTROL OR REGULATION OF THE FISCHER-TROPSCH REACTION:

	This subclass is indented under the class definition. Processes wherein some means or method is employed to control or regulate the reaction temperature.

713	GROUP IB METAL CONTAINING CATALYST UTILIZED FOR THE FISCHER-TROPSCH REACTION (i.e., Cu, Ag, or Au):

	This subclass is indented under the class definition. Processes wherein a catalyst containing copper, silver, or gold is utilized for the Fischer-Tropsch reaction.

714	GROUP VIB METAL CONTAINING CATALYST UTILIZED FOR THE FISCHER-TROPSCH REACTION (i.e., Cr, Mo, or W):

	This subclass is indented under the class definition. Processes wherein a catalyst containing chromium, molybdenum, or tungsten is utilized for the Fischer-Tropsch reaction.

715	GROUP VIII METAL CONTAINING CATALYST UTILIZED FOR THE FISCHER-TROPSCH REACTION (i.e., Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, or Pt):

	This subclass is indented under the class definition. Processes wherein a catalyst containing iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium, or platinum is utilized for the Fischer-Tropsch reaction.

716	. Rhodium containing catalyst:

	This subclass is indented under subclass 715. Processes wherein the catalyst contains rhodium.

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):

	This subclass is indented under subclass 715. Processes wherein a material containing lithium, sodium, potassium, rubidium, cesium, beryllium, magnesium, calcium, strontium, or barium is utilized in any way during the Fischer-Tropsch reaction.

718	.. In the form of a salt:

	This subclass is indented under subclass 717. Processes wherein a salt of a Group IA or IIA light metal is utilized.

719	. Iron containing catalyst:

	This subclass is indented under subclass 715. Processes wherein a catalyst containing iron is utilized.

720	.. Pretreatment of the catalyst:

	This subclass is indented under subclass 719. Processes wherein the iron-containing catalyst is treated in some manner prior to use.

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.):

	This subclass is indented under subclass 719. Processes wherein a metal, in addition to the iron, is utilized in any form, e.g., as part of the catalyst, in a promoter or retarder, etc.

722	ADSORPTION WITH A SOLID MATERIAL:

	This subclass is indented under the class definition. Processes which include adsorption utilizing a solid material.

723	SALT CONTAINING EXTRACTANT UTILIZED:

	This subclass is indented under the class definition. Processes which include utilizing a salt-containing material as an extractant.

724	SOLVENT EXTRACTION UTILIZED:

	This subclass is indented under the class definition. Processes which include utilizing a solvent as an extractant.

725	. Alcohol containing extractant utilized:

	This subclass is indented under subclass 724. Processes wherein the solvent utilized contains hydroxy groups.

726	Hydrogenation with gaseous hydrogen to purify or recover:

	This subclass is indented under the class definition. Processes which include hydrogenation utilizing gaseous hydrogen to purify or recover the product(s) of the Fischer-Tropsch reaction.

727	FORMING SALTS OR OXIMES OF OXYGEN CONTAINING COMPOUNDS TO PURIFY OR RECOVER:

	This subclass is indented under the class definition. Processes which include forming salts or oximes of the oxygen-containing compounds produced to purify or recover the products of the Fischer-Tropsch reaction.

728	MISCELLANEOUS:

	This subclass is indented under the class definition. Processes not provided for in any other subclass to purify or recover.