Reprocessing of Spent Catalyst

Reprocessing of Spent Catalyst

Vineeth Precious Catalysts (P) Ltd undertakes job work of recovery of precious metal from spent catalyst and Its conversion into fresh catalyst on commercial basis, The details of terms & conditions can be obtained from the office of the company, Representative of the customer is allowed to remain present and witness the ashing and Palladium content estimation process.


When the activity of the used precious metal catalyst is not sufficient enough for the next cycle of hydrogenation, the spent precious metal catalyst should be sent to the supplier for recovery of precious metal, its refining and thereafter its usage for making fresh catalysts. Vineeth Precious Catalysts Pvt. Ltd., is fully equipped for this job and undertakes the same on commercial terms. Vineeth Precious Catalysts Pvt. Ltd., is able to recover more than 99% of precious metal present in the spent catalyst. For further details contact General Manager, Vineeth Precious Catalysts Pvt. Ltd., Vasai.


Once the job work charges are mutually settled, the customer is advised to send the consignment of spent palladium catalyst to the works of Vineeth Precious Catalyst Pvt. Ltd. After the consignment reaches Vineeth Precious Catalysts Pvt. Ltd., its gross weight, tare weight and net weight details are physically verified and findings are sent to the customer.

The consignment is then transferred to s.s trays and trays inserted into an LDO fired Refractory Muffle Furnace for incineration. The incineration process takes nearly three days for completion. The ash obtained after incineration is allowed to cool and thereafter homogenized by mixing it thoroughly and ash weighed on a calibrated electronic balance. Three samples of ash, 10 gms each, are drawn at this stage. One sample is handed over to the customer. The second sample is handed over to the laboratory of Vineeth Precious Catalysts Pvt. Ltd., for the estimation of precious metal content. and the third sample is kept in the safe custody of the chief executive of M/s. Vineeth Precious Catalysts Pvt. Ltd., for use as a reference sample in case of a dispute in respect of precious metal content.

A representative of the customer is allowed to remain present and witness the ashing and precious metal content estimation process. The precious metal content of the consignment is thereafter calculated and communicated to the customer.

Fresh precious metal catalyst equivalent to 97% of the assessed precious metal content of the consignment of spent precious metal catalyst is handed over to the customer within a period of 15 days from the date of receipt of consignment of spent Palladium catalyst, Arrangements for superfast service (accelerated recovery) i.e. 85% of the expected quantity of fresh catalyst delivered within two days and balance in two weeks time can also be worked out for regular customers.

Catalyst made from recovered and refined metal is as good as fresh catalyst. As a matter of fact it is a fresh catalyst only.

A well documented and transparent system is followed at Vineeth Precious Catalysts Pvt. Ltd., Copies of all test methods and specifications are made available to the customer.


Raney Nickel Catalyst is one of the costly ingredients in the manufacture of various chemicals involving hydrogenation, often queries come from users of this catalyst as to whether it can be reactivated after it has lost its hydrogenation capabilities to a significant level. There is no simple and straight answer to this question. The possibility of reactivation of spent Raney Nickel Catalyst depends upon a multitude of factors; notable among them being nature of contaminants and present level of hydrogenation capability of the catalyst under reference. Once the level of hydrogenation capability falls below a critical level, it is not at all possible to reactivate the same. Other questions of importance obviously pertains to the economics of reactivation.

Whenever therefore a user of Vineeth Precious Catalysts Pvt. Ltd., Vasai, made Raney Nickel Catalyst approaches us for reactivation of the Catalyst, the first job done is calling for the sample of the spent catalyst.

The present level of hydrogenation capability is judged in an empirical manner by examining its current hydrogenation capability as determined on our Activity Apparatus after making its sample free from the contaminants. Based on this test, a decision is taken as to whether the material can be reactivated or not. If it is felt by the technical team that the material can be reactivated, it is subjected to a special process of reactivation. The process of reactivation generally involves a loss of 5 to 40% of the material due to the removal of Oxidized Nickel and contaminants/residues of reactants. In certain cases, the material can not be subjected to the reactivation process if the catalyst has become totally oxidized.

The user is then informed about the expected losses (reported in terms of percentage of weight of Nickel received) and the cost of reactivation which is reported in terms of per kg of reactivated Catalyst obtained. After receiving the material and user's approval, the material is weighed and subjected to the reactivation process. The reactivated material is then tested, packed and sent back to the party of origin.

It should, however, be noted that hydrogenation capability of reactivated catalyst is marginally lower than that of fresh Raney Nickel Catalyst and therefore while using reactivated catalyst it should be supplemented with appropriate quantities of fresh Raney Nickel Catalyst to compensate for the deficiency inactivity of the reactivated catalyst.