	US 11,891,356 B2
	Production of high yields of light olefins from heavy hydrocarbons
Sadhullah Mukthiyar, Faridabad (IN); Shikha Saluja, Faridabad (IN); Gadari Saidulu, Faridabad (IN); Arumugam Velayutham Karthikeyani, Faridabad (IN); Madhusudan Sau, Faridabad (IN); Debasis Bhattacharyya, Faridabad (IN); Gurpreet Singh Kapur, Faridabad (IN); and Sankara Sri Venkata Ramakumar, Faridabad (IN)
Assigned to INDIAN OIL CORPORATION LIMITED, Mumbai (IN)
Filed by INDIAN OIL CORPORATION LIMITED, Maharashtra (IN)
Filed on Feb. 21, 2023, as Appl. No. 18/112,365.
Claims priority of application No. 202221009125 (IN), filed on Feb. 21, 2022.
Prior Publication US 2023/0265026 A1, Aug. 24, 2023
Int. Cl. C07C 4/06 (2006.01); B01J 29/08 (2006.01); B01J 29/40 (2006.01); B01J 29/80 (2006.01)

CPC C07C 4/06 (2013.01) [B01J 29/08 (2013.01); B01J 29/40 (2013.01); B01J 29/80 (2013.01); C07C 2529/08 (2013.01); C07C 2529/40 (2013.01); C07C 2529/80 (2013.01)]

7 Claims

1. A process for conversion of hydrocarbon feedstock into light olefins of C₂-C₄carbons in the presence of a catalyst system, the process comprising:

cracking of the hydrocarbon feedstock in a temperature of range of 550° C. to 650° C., weight hourly space velocity (WHSV) in a range of 100-300 hr⁻¹and a pressure in a range of 1-4 kg/cm²g in a concentric downflow reactor,

wherein the catalyst system comprises 7-10 wt % of an ultra-stable Y zeolite; 4-8 wt % of a shape selective pentasil zeolite; 2.5-5 wt % of a bottom selective material, wherein the bottom selective material is mesoporous acidic alumina; 0.5-2 wt % of rare earth metals; and 75-88 wt % of a support material,

wherein the hydrocarbon feedstock comprises feedstock selected from the group consisting of C₄, reduced crude oil, Vacuum Residue, Hydrotreated Vacuum Gas Oil (HDT-VGO) and hydrocracker bottom,

wherein the catalyst is present in the range 25-40 wt. % of the hydrocarbon feedstock, and

recycling 0 to 50% of products from the concentric downflow reactor

to yield 40-65 wt % of fresh hydrocarbon feedstock as light olefins of C₂-C₄carbons.