:: Recycling of the catalyst ::

After the hydrogenation is over the catalyst may have still retained substantial activity, For the reasons of economics it is therefore worthwhile to examine possibility of reuSing the catalyst. In case the catalyst
has retained significant part of its original activity, the catalyst should be seperated from the products of reaction in such a manner so that there is no further loss In its activity,
The catalyst so separated can be used for hydrogenation of a fresh lot of the same product. Some quantity of fresh catalyst should also be introduced to make up for the reduced activity of the used catalyst. When the activity of the used catalyst goes down by

Note: Catalyst used for hydrogenation of one product should never be reused for hydrogenation of another product.