Systems and methods for producing a crude product

US7938954B2 · kind B2 · utility

Assignee

• CHEVRON U.S.A. INC. · US

Inventors

• Julie Chabot · Houston, US
• Bo Kou · Albany, US
• Vivion Andrew Brennan · San Francisco, US
• Erin Maris · Alameda, US
• Shuwu Yang · Richmond, US
• Bruce Reynolds · Martinez, US

Key dates

• Filing date: Sep 18, 2008
• Grant date: May 10, 2011
• Expiry date: Nov 12, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G65/10
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Systems and methods for hydroprocessing a heavy oil feedstock with reduced heavy oil deposits, the system employs a plurality of contacting zones and separation zones zone under hydrocracking conditions to convert at least a portion of the heavy oil feedstock to lower boiling hydrocarbons, forming upgraded products. The contacting zones operate under hydrocracking conditions, employing a slurry catalyst for upgrading the heavy oil feedstock, forming upgraded products of lower boiling hydrocarbons. In the separation zones, upgraded products are removed overhead and optionally, further treated in an in-line hydrotreater. At least a portion of the non-volatile fractions recovered from at least one of the separation zones is recycled back to the first contacting zone in the system, in an amount ranging between 3 to 50 wt. % of the heavy oil feedstock.