Method for regenerating hydrogenation catalyst
AssigneeHanwha Solutions Corporation
InventorsSun Woo YOOK, Jeong Kwon KIM, Bong Sik JEON, Wan Jae MYEONG
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Abstract
The present invention relates to a method for regenerating a dicarboxylic acid or carboxylic acid hydrogenation catalyst, and more particularly, to a method for regenerating a hydrogenation catalyst to be used in a reaction of converting a dicarboxylic acid group into a diol group. The present invention provides an effect of regenerating a catalyst deactivated by the deposition of esters to be produced in a reaction of converting a dicarboxylic acid group into a diol group.
Claims16
A method for regenerating a catalyst used in a hydrogenation reaction of carboxylic acid or carboxylic acid ester, the method comprising the steps of:
- (a) adding a used catalyst to an organic solvent and washing the catalyst while stirring the catalyst;
- (b) separating and recovering the catalyst by filtering after the washing;
- and
- (c) drying and reactivating the separated and recovered catalyst.
A method for regenerating a catalyst used in a hydrogenation reaction of carboxylic acid or carboxylic acid ester, the method comprising the steps of:
- (i) adding a used catalyst and a solvent to a reactor;
- (ii) replacing a composition of gas inside the reactor with hydrogen;
- and
- (iii) reactivating the catalyst by performing a hydrothermal hydrogenation reaction while stirring under a condition in which a reactor internal temperature is 100-400° C. and a hydrogen gas pressure is 1-20 Mpa.
Dependencies are inferred from the claim text.