Hydrocarbon cracking catalyst and process for producing light olefins

Patent metadata

Field	Value
Publication number	US-10280372-B2
Application number	US-201415038603-A
Country	US
Kind code	B2
Filing date	Jan 7, 2014
Priority date	Nov 21, 2013
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

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.

First claim

We claim:

1. A process for catalytic cracking of hydrocarbon feed streams to light olefins, the process comprising contacting a hydrocarbon feed stream with a catalyst composition at reaction conditions to produce a mixture containing ethylene, propylene, and C4 unsaturates;
wherein said catalyst composition comprises:
a USY zeolite with a silica/alumina ratio of more than 40; a pentasil zeolite; a phosphate containing compound; and an alumina silica binder;
wherein said catalyst is impregnated with cerium oxide.

2. The process as claimed in claim 1 , wherein a yield of the mixture of ethylene, propylene, and C4 unsaturates is in the range of 39 wt. % to 55 wt. % of the hydrocarbon feed stream.

3. The process as claimed in claim 1 , wherein the hydrocarbon feed stream is a natural gas condensate hydrocarbon feed.

4. The process as claimed in claim 1 , wherein the hydrocarbon feed stream comprises 65-95 wt % C5-C20 hydrocarbons, 5-35 wt % aromatics, and optionally olefins.

5. The process as claimed in claim 1 , wherein the reaction is carried out at a temperature range of 500 to 650° C.

6. The process as claimed in claim 1 , wherein the catalyst is continuously circulated between a fluidized bed reactor, stripper and riser via a stand pipe and a side valve.

7. The process as claimed in claim 1 , wherein the catalyst to hydrocarbon feed stream ratio ranges from 8 to 20.

8. The process as claimed in claim 1 , wherein the catalyst is contacted with the hydrocarbon feed stream in a fluidization regime of a riser reactor of a circulating fluidized bed reactor—regenerator system.

Assignees

• Indian Oil Corp Ltd

Inventors

• Sarkar Biswanath
• Das Satyen Kumar
• Kukade Somnath
• Mishra Ganga Shankar
• Dalai Eswar Prasad
• Chidambaram Velusamy
• Pandey Sudhir Kumar
• Thakur Ram Mohan
• Bhattacharyya Debasis
• Rajagopal Santanam

Classifications

• C10G2400/20

  C2-C4 olefins · CPC title

• C10G11/18

  according to the "fluidised-bed" technique · CPC title

• C10G11/05 Primary

  Crystalline alumino-silicates, e.g. molecular sieves · CPC title

• B01J2229/42

  Addition of matrix or binder particles · CPC title

• B01J2229/20

  to introduce other elements in the catalyst composition comprising the molecular sieve, but not specially in or on the molecular sieve itself · CPC title