公开(公告)号：US20240216903A1

公开(公告)日：2024-07-04

申请号：US18524086

申请日：2023-11-30

Applicant: Indian Oil Corporation Limited

Inventor： Prosenjit MAJI ,  Saravanan SUBRAMANI ,  Satyen Kumar DAS ,  Madhusudan SAU

IPC: B01J38/60 ,  B01J38/02 ,  B01J49/50

CPC classification number: B01J38/60 ,  B01J38/02 ,  B01J49/50

Abstract: The present invention relates to a process for in-situ regeneration of spent ion exchange resin catalyst used in the dimerization of olefins, etherification and alkylation processes by various impurities coming from feed streams and heavier oligomers forms as byproducts. The process involves backwashing with water which is followed by the step of naphtha washing. Naphtha washing involves filling the reactor with paraffinic naphtha and soaking the catalyst bed in naphtha. The step of naphtha washing is followed by naphtha circulation in the reactor. The last step involves treatment with diluted HCl solution wherein deposited impurities at the ion exchange sites are removed using diluted HCl. The process achieves up to 80% regeneration of spent catalysts.

公开(公告)号：US20190248720A1

公开(公告)日：2019-08-15

申请号：US16237319

申请日：2018-12-31

Applicant: INDIAN OIL CORPORATION LIMITED

Inventor： Saravanan SUBRAMANI ,  Prosenjit MAJI ,  Reshmi MANNA ,  Pushkar VARSHNEY ,  Latoor Lal SAROYA ,  Kamlesh GUPTA ,  Dheer SINGH ,  Debasis BHATTACHARYYA ,  Sanjiv Kumar MAZUMDAR ,  Sankara Sri Venkata RAMAKUMAR

IPC: C07C27/10 ,  C07C43/04

Abstract: The present invention relates to a process for etherification of mixed olefinic light naphtha boiling in the range of C5-90° C. cut with simultaneous minimization of unreacted methanol concentration in the product. The etherification of mixed olefinic light naphtha produces the high octane blending component which can be blended directly in the gasoline pool without any recovery of the feed oxygenates like methanol, ethanol etc. which conventionally uses energy intensive separation processes.

公开(公告)号：US20200080006A1

公开(公告)日：2020-03-12

申请号：US16560531

申请日：2019-09-04

Applicant: Indian Oil Corporation Limited

Inventor： Subramani SARAVANAN ,  Bandaru Venkata HARI PRASADGUPTA ,  Prosenjit MAJI ,  Shoeb Hussain KHAN ,  Jagdev Kumar DIXIT ,  Shakti SINGH ,  Reshmi MANNA ,  Madhusudan SAU ,  Debasis BHATTACHARYYA ,  Sanjiv Kumar MAZUMDAR ,  Sankara Sri Venkata RAMAKUMAR

IPC: C10G11/05 ,  C07C4/06 ,  B01J8/18 ,  B01J8/26 ,  B01J8/02

Abstract: The present invention provides a process for a production of light olefins and aromatics from cracked light naphtha by selective cracking. The present invention thus provides a process for up grading cracked olefinic naphtha to high value petrochemical feed stocks. This process is based on catalytic cracking in which the catalyst activity is optimized by depositing coke for production of light olefins and aromatics. The proposed process has high flexibility and can be operated either in maximizing olefins as reflected from the PIE ratio or in maximizing aromatics (BTX) at different modes of operation depending upon the product requirement.