Selected cyclohexane-1,3- and 1,4-dicarboxylic acid esters

C - Chemistry – Metallurgy – 07 – C

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Details

C07C 69/75 (2006.01) C07C 67/303 (2006.01) C08K 5/12 (2006.01) B01J 23/40 (2006.01) B01J 23/46 (2006.01) B01J 35/10 (2006.01)

Patent

CA 2374924

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 contains 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.

La présente invention concerne des esters d'acide 1,3- et 1,4-dicarboxylique cyclohexane sélectionnés, leur utilisation comme plastifiants dans des matières plastiques ainsi que leur préparation par hydratation des esters d'acide isophthalique et téréphthalique correspondants grâce à la mise en contact d'un ou de plusieurs de ces esters d'acide isophthalique ou téréphthalique avec un gaz contenant de l'hydrogène en présence d'un catalyseur comprenant, en tant que métal actif, au moins un métal du sous-groupe VIII du tableau périodique des éléments seul ou avec au moins un métal du sous-groupe I ou VII du tableau périodique des éléments, répandus sur un support se caractérisant par la présence de macropores.

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