What is the term used for partially deactivated palladised charcoal?

Partially deactivated palladised charcoal is known as Lindlar’s catalyst.

Lindlar’s Catalyst

  • The catalyst is used for the hydrogenation of alkynes to alkenes (i.e. without further reduction into alkanes).
  • Lindlar catalysts are heterogeneous catalysts.
  • It is composed of palladium that is deposited on calcium carbonate (CaCO3) and then poisoned by suitable catalytic poisons, the most common of which being lead and sulfur.

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