An indigenous sweetening catalyst Thoxcat ES has been developed by our Constituent laboratories of Ministry of Science & Technology and is available for commercialization. This catalyst can be used for extractive sweetening of LPG and also liquid-liquid sweetening of lighter petroleum fractions like light straight run naphtha / light cracked gasoline.
The presence of mercaptans in petroleum products like LPG, naphtha, gasoline, ATF and kerosene is undesirable due to their foul odour and highly corrosive nature. In commercial practice, the low molecular weight mercaptans present in LPG and light straight run naphtha (LSRN) are first extracted with alkali and subsequently catalytically oxidized to disulfides with air
Process Highlights:
i) The price is comparatively less
ii) Catalyst consumption is less for similar conversion
iii) No investment is needed for any plant modification
iv) Can be used in conventional as well as fibre film sweetening processes
Department of Scientific and Industrial Research
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