Processes for recovering LPG from a reforming-zone effluent

US11441838B2 · kind B2 · utility

Assignee

• UOP LLC · US

Inventors

• Thuy Vu · San Jose, US
• Robert E. Tsai · Arlington Heights, US
• Xin X. Zhu · Long Grove, US
• Amit Goyal · Knoxville, US
• William Yanez · Crystal Lake, US
• Sudipta Ghosh · Sherghati, IN

Key dates

• Filing date: Feb 15, 2019
• Grant date: Sep 13, 2022
• Expiry date: Jul 11, 2041

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F25J2230/08
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Embodiments of apparatuses and methods for reforming of hydrocarbons including recovery of products are provided. In one example, a method comprises separating a reforming-zone effluent into a net gas phase stream and a liquid phase hydrocarbon stream. The net gas phase stream is separated for forming an H2-rich stream and a first liquid phase hydrocarbon stream. The H2-rich stream may be contacted with an adsorbent to form an H2-ultra rich stream and a gas stream. C3/C4 hydrocarbons are absorbed from the gas stream with the liquid phase hydrocarbon stream. The gas stream may be contacted with an H2/hydrocarbon separation membrane to separate the PSA tail gas stream and form an H2-rich permeate stream and an H2 depleted non-permeate residue stream.