Integrated hydrocracking and dewaxing of hydrocarbons

US8992764B2 · kind B2 · utility

Assignee

• EXXONMOBIL RESEARCH AND ENGINEERING COMPANY · US

Inventors

• Krista Marie Prentice · Fryeburg, US
• Michel Daage · Baton Rouge, US
• Ajit B. Dandekar · South Plainfield, US
• Christopher G. Oliveri · Stewartsville, US
• Rohit Vijay · Bound Brook, US
• Stephen J. McCarthy · Center Valley, US
• Wenyih F. Lai · Bound Brook, US
• Bradley R. Fingland · Jackson, US

Key dates

• Filing date: Jun 27, 2011
• Grant date: Mar 31, 2015
• Expiry date: Jan 17, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10L2290/543
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An integrated process for producing naphtha fuel, diesel fuel and/or lubricant base oils from feedstocks under sour conditions is provided. The ability to process feedstocks under higher sulfur and/or nitrogen conditions allows for reduced cost processing and increases the flexibility in selecting a suitable feedstock. The sour feed can be delivered to a catalytic dewaxing step without any separation of sulfur and nitrogen contaminants. The integrated process includes an initial dewaxing of a feed under sour conditions, optional hydrocracking of the dewaxed feed, and a separation to form a first diesel product and a bottoms fraction. The bottoms fraction is then exposed to additional hydrocracking and dewaxing to form a second diesel product and optionally a lubricant base oil product. Alternatively, a feedstock can be hydrotreated, fractionated, dewaxed, and then hydrocracked to form a diesel fuel and a dewaxed, hydrocracked bottoms fraction that is optionally suitable for use as a lubricant base oil.