SELECTED CYCLOHEXANE-1,3- AND 1,4-DICARBOXYLIC ACID ESTERS

摘要

The invention relates to selected cyclohexane-1,3- and 1,4-dicarboxylic acid esters, to their use as plasticizers in synthetic materials and to their production. The inventive method of production comprises hydrating the corresponding isophthalic acid and terephthalic acid esters by contacting one or more of such isophthalic acid or terephthalic acid esters with a hydrogen--containing gas in the presence of a catalyst. Said catalyst contai ns as the active metal at least one metal of subgroup VIII of the periodic system alone or together with at least one metal of subgroup I or VII of the periodic system, applied on a substrate. The inventive method is further characterized in that the substrate is macroporous.