US 8,802,879 B2Granted

Process for removal of metals from oils/fats

AssigneeIndian Oil Corporation Limited

InventorsSarvesh Kumar, Ravi B. Kumar, Alok Sharma, Brijesh Kumar, Surbhi Semwal, Ajay Kumar Arora, Suresh Kumar Puri, Saeed Ahmed, Vivekanand Kagdiyal, Santanam Rajagopal, Ravinder Kumar Malhotra, Anand Kumar

Life of this patent

Estimating the term…

patentgrep

Loading patent…

Abstract

The invention describes process for demetallation of vegetable oils and animal fats to reduce metal content below 1 ppm to make them suitable for hydroprocessing feedstocks. The process comprises acid treatment with very low concentration of acids, utilizing synergistic effect of phosphoric acid and citric acid, followed by counter-current treatment with clay without intermediate step of water washing and treatment with ion exchange resin.

Claims25

Dependent claims

An environment friendly process for removal of total metals below 1 ppm in vegetable oils/animal oils/fats, said process comprising:

treating a feed comprising vegetable oils/animal oils/fats with phosphoric acid and citric acid to obtain a reaction mixture;
and
treating the reaction mixture with clay in one or more stages,
wherein:
an amount of phosphoric acid used is in the range of 0.01 to 0.10 wt % and an amount of citric acid used is in the range of 0.01 to 0.10 wt %, the wt % being with respect to the vegetable oils/animal oils/fats, so that their synergistic effect enhances the performance and reduces the requirement of the said acids and clay;
and
the process is conducted without a water washing step, making the process effluent free.

4 more elements

Dependencies are inferred from the claim text.