| 摘要 |
This invention relates to the dehydrogenation of a 3- beta -hydroxy steroid or a mixture of soy sterols to form the corresponding mixture of DELTA 4-3-keto derivatives of phytosterols, the improvement which comprises dehydrogenation of the steroid or mixture of sterols using a supported nickel catalyst and carrying out the dehydrogenation in the presence of at least two chemically different hydrogen acceptors. One such process uses a supported nickel catalyst and a dialkyl ketone, such as methyl ethyl ketone, and an olefin, such as 1-hexene, as the two different hydrogen acceptors.
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