Patent ID: 9108997
Filing Date: 2015-08-18
Classification: B01J,C07C,C07F

Abstract:
1. A method for recycling an organic ruthenium compound for chemical vapor deposition by extracting an unreacted organic ruthenium compound from a used raw material which has undergone a thin film formation process, wherein the used raw material comprises any of the organic ruthenium compounds having the following chemical formulae, Chemical Formula 1, Chemical Formula 2, Chemical Formula 3, and the method comprising the following steps (a) to (c), wherein order of the steps (a) to (c) is arbitrary and the step (a) and the step (b) may be carried out simultaneously: (a) a modification step in which the used raw material and a hydrogenation catalyst are brought into contact with each other in a hydrogen atmosphere, thereby hydrogenating an oxidized organic ruthenium compound in the used raw material; (b) an adsorption step in which the used raw material and an adsorbent are brought into contact with each other, thereby removing impurities in the used raw material; and (c) a restoration step in which the used raw material is heated at a temperature that is not lower than −100° C. and not higher than −10° C. with respect to the decomposition temperature of the organic ruthenium compound for eight hours or more, thereby adjusting a ratio of isomers of the organic ruthenium compound in the used raw material; wherein Chemical Formula 1 is wherein the substituent R is a linear chain or branched chain alkyl group; Chemical Formula 2 is wherein the substituent R is a linear chain or branched chain alkyl group; and Chemical Formula 3 is wherein the substituent R is a linear chain or branched chain alkyl group.