| 摘要 |
gamma -BUTYROLACTONE, WHICH IS AN IMPORTANT PRELIMINARY PRODUCT FOR THE PREPARATION OF BUTANEDIOL-(1,4) AND OF PYRROLIDONE, IS MANUFACTURED BY CATALYTIC HYDROGENATION OF MALEIC ACID, MALEIC ACID ANHYDRIDE, SUCCINIC ACID, SUCCINIC ACID ANHYDRIDE, OR FUMARIC ACID, OR OF A MIXTURE OF TWO OR MORE OF THESE COMPOUNDS, USING A CATALYST CONTAINING A MIXTURE OF AN ELEMENT OF THE VIIIth subgroup of the periodic system of elements or of one of its compounds with an element of the Ist subgroup of the periodic system of elements or of one of its compounds. The process is highly selective, and the yields of gamma -butyrolactone are, therefore, excellent.
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