Waste residue not dutiable and Modvat credit allowed where input is used through a non-excisable intermediate process.

Spent nickel catalyst generated during manufacture was treated as waste or residue, not a dutiable manufactured product, because it was not shown to be a marketable excisable item and no specific tariff entry covered it. Modvat credit was also held admissible on denatorium saccharide used to denature ethyl alcohol, as the input was consumed in the manufacturing chain through an intermediate process even though the intermediate product was non-excisable. The Revenue's challenge therefore failed, and the assessee's claim to both reliefs was upheld.

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Issues: (i) Whether spent nickel catalyst arising during manufacture was liable to central excise duty; (ii) Whether Modvat credit was admissible on denatorium saccharide used for denaturing ethyl alcohol through an intermediate process.

Issue (i): Whether spent nickel catalyst arising during manufacture was liable to central excise duty.

Analysis: The duty liability depended on whether the spent nickel catalyst was a marketable excisable product or merely waste arising in the course of manufacture. In the absence of a specific tariff entry covering such waste, and in view of the finding that the catalyst was spent residue generated during the manufacturing process, it could not be treated as a dutiable manufactured product.

Conclusion: The issue was decided in favour of the assessee and against the Revenue.

Issue (ii): Whether Modvat credit was admissible on denatorium saccharide used for denaturing ethyl alcohol through an intermediate process.

Analysis: Denatorium saccharide was used to denature ethyl alcohol, making it unfit for human consumption, and was therefore used in the course of manufacture even though it did not directly enter the final product. Credit was allowable where inputs were used through an intermediate product, even if that intermediate product was not excisable.

Conclusion: The issue was decided in favour of the assessee and against the Revenue.

Final Conclusion: The Revenue's challenge failed, and the assessee's entitlement to the disputed reliefs was upheld.

Ratio Decidendi: A waste or residue generated in the course of manufacture is not dutiable unless it answers the test of a marketable excisable product or is specifically covered by the tariff, and Modvat credit is available where an input is used in manufacture through an intermediate product even if that intermediate product is non-excisable.

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