With recycle, rehabilitation, or preservation of solvent, diluent, or mass-action agent:
Collection of documents (under unnumbered subclass CATALYST AND RECYCLE CONSIDERATIONS) (a) to prevent loss of, (b) to restore effectiveness, or (c) to return to a stage of a process, either directly to indirectly, from which it has been withdrawn from use in that stage, a material which is a solvent or diluent or an agent, usually a normally undesired by-product of the process, which regulates the equilibrium of the process to favor production of desired product.
(1) Note. Recycled effluent from a process which is added to a feedstock in an amount designed to control reaction time is considered to be a solvent or diluent.
SEE OR SEARCH THIS CLASS, SUBCLASS:
702, for a saturated compound synthesis process in which a material used as a solvent in one stage of a process is used as a catalyst in another part of the process before return to the original stage.
954, for other processes which exploit mass-action phenomena.
