Process intensification in hydroprocessing

US10017703B2 · kind B2 · utility

Assignee

• Indian Oil Corporation Limited · IN

Inventors

• Ganesh Vitthalrao Butley · Faridabad, IN
• Yamini Gupta · Faridabad, IN
• Mainak Sarkar · Faridabad, IN
• Arun ARANGARASU · Faridabad, IN
• Madhusudan Sau · Barwala, IN
• Brijesh Kumar · Barwala, IN
• Santanam Rajagopal · Faridabad, IN
• Ravinder Kumar Malhotra · Faridabad, IN

Key dates

• Filing date: Jun 24, 2014
• Grant date: Jul 10, 2018
• Expiry date: Jan 27, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G2300/202
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A multi-stage hydrotreating process obtains ultra-low sulfur diesel boiling range hydrocarbon having less than 10 ppm sulfur with elimination of external hot high pressure separator and avoids the formation of recombinant mercaptans by removing excess hydrogen sulfide formed during hydroprocessing reaction. The process includes mixing a diesel boiling range hydrocarbon feedstock with hydrogen and sending to the first predominantly liquid phase hydroprocessing reaction stage. Effluent from the first hydroprocessing reaction stage is sent to first separator zone of open and empty space in the upper part of the second hydroprocessing reaction stage to flash off the dissolved reaction products hydrogen sulfide and ammonia. Liquid part of the effluent of first hydroprocessing reaction stage is passed to the second predominantly liquid phase hydroprocessing reaction stage. The process is repeated until the liquid product sulfur level of less than 10 ppm is attained and the liquid product is sent to further processing.