Catalyst for carbonylating naphthalene mono- and disulfonates and process using said catalyst
AssigneeEnichem S.p.A.
InventorsGiuseppe Cometti, Annick Du Vosel, Franco Francalanci, Roberto Santi
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Abstract
A cobalt based catalyst, and the method for preparing it, are disclosed. The catalyst is obtained from the reaction between NaCo(CO).sub.4 and s-trichloro triazine and is advantageously used in the processes of carbonylation of naphthalene mono- and disulfonates in order to yield naphthalene esters and acids.
Claims14
Catalyst for naphthalene mono- and disulfonates carbonylation having the formula (II):
- Z--Co(CO).sub.4 (II)
- in which Z stands for the 2,5-dichloro-l,3,5-triazinyl radical:
- ##STR4##
Process for preparing naphthalene esters and acids, consisting in carbonylating naphthalene nono- and disulfonates with carbon monoxide, in an alcoholic solvent, at atmospheric pressure, at temperatures comprised within the range of from -20.degree. C. to 60.degree. C., in the presence of an acidity acceptor compound and of a catalyst which, in its active form, is constituted by a cobalt complex of formula (II).
Dependencies are inferred from the claim text.