The catalyst can be prepared by reduction of a precursor of a hydrogenation-active metal, which may be present on an oxidic support, by reaction with at least one compound of the formula (I)

HnM(OR)3-n  (I)

where

  • M is Ga or Al,
  • R is CR3 or SiR3 where R is C1-20-alkyl, and
  • n is 1 or 2,

    or dimers or oligomers thereof, wherein the crystallite size of the hydrogenation-active metal in the finished catalyst is from 5 to 30, preferably 5 to 15 nm.

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