Indian Oil Corporation Limited

Somnath Kukade

Debasis Bhattacharyya

Santanam Rajagopal

Brijesh Kumar

Satheesh Vetterkunnel Kumaran

Gadari Saidulu

Mukthiyar Sadhullah

Satyen Kumar Das

Ram Mohan Thakur

Biswanath Sarkar

Velusamy Chidambaram

Manoj Kumar Bhuyan

Eswar Prasad Dalai

Ganga Shankar Mishra

Sudhir Kumar Pandey

Gopinath Bhanuprasad Sayapaneni

Satheesh Kumaran Vetterkunnel

Debasis Bhattacharya

The present invention relates to a novel catalyst composition for catalytic cracking of hydrocarbon streams to enhance the yield of light olefins. The catalyst composition for the cracking of hydrocarbon feed streams to light olefins, comprises a USY zeolite with silica/alumina ratio of more than 40, pentasil zeolite, a phosphate compound and alumina silica binder. The yield of olefins is further increased when the catalyst composition is impregnated with a cerium oxide. The present invention also provides a process of increasing the yield of light olefins from hydrocarbon feed streams comprising contacting the hydrocarbon streams with catalyst compositions of the present invention.

Hydrocarbon cracking catalyst and process for producing light olefins

An apparatus which is an integral hardware consisting of an annular downer reactor and a concentric upflow riser regenerator for catalytic cracking of hydrocarbon feed to is disclosed. The annular downer reactor terminates in annular stripper which is also concentric with the regenerator. The regenerator, reactor and stripper are in fluid connection with each other. The apparatus is highly compact and provides efficient contact between circulating catalyst and hydrocarbon feed. The proposed hardware includes a novel radial distributor for providing improved control and radial distribution of catalyst inside the downflow reactor. The radial distributor has equal numbers of stationary and movable parts placed one after another to cover the entire annular opening at the bottom of the regenerated catalyst vessel. The radial distributor is concentric with regenerator and located between the catalyst holding vessel and the reactor. A process for catalytic cracking using the invented apparatus is also disclosed.

Process for fluid catalytic cracking

Apparatus for fluid catalytic cracking

A process for increasing the yield of Colefin in fluidized bed catalytic cracking of hydrocarbon feedstocks is disclosed. Cfraction produced from the cracking of hydrocarbon feedstock in the primary reaction zone (riser), optionally with external source of Cstream is fed into the stripper which acts as a secondary reaction zone at an elevated temperature and at an optimum WHSV. The elevated temperature is achieved by injecting a part of the regenerated catalyst from regenerator, which is at a higher temperature, directly into the stripper through a dedicated additional lift line. This raises the activity of catalyst inside the stripper. The direct injection of regenerated catalyst into the stripper, besides producing higher yields of propylene, improves the stripping efficiency leading to enhanced recovery of strippable hydrocarbons.

Process for production of C3 olefin in a fluid catalytic cracking unit

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Faridabad, India

Somnath Kukade