Use of morpholine-based hindered amine compounds for selective removal of hydrogen sulfide

US10525404B2 · kind B2 · utility

Assignees

• BASF SE
• EXXONMOBIL RESEARCH AND ENGINEERING COMPANY · US

Inventors

• Thomas Ingram · Keller, US
• Gerald Vorberg · Ludwigshafen, DE
• Martin Ernst · Ludwigshafen am Rhein, DE
• Carla S. Pereira · Somerville, US
• Michael Siskin · Dover, US

Key dates

• Filing date: Apr 5, 2017
• Grant date: Jan 7, 2020
• Expiry date: Apr 5, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02C20/40
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for removing acid gases from a fluid stream, wherein the fluid stream is contacted with an absorbent comprising a compound of the general formula (I), wherein R1 and R2 are independently C1-C4-alkyl; R3 is selected from hydrogen and C1-C4-alkyl, R4, R5 and R6 are independently selected from hydrogen and C1-C4-alkyl; x and y are integers from 2 to 4 and z is an integer from 1 to 3, to obtain a treated fluid stream and a laden absorbent. The process allows for a high cyclic capacity while the compounds of the absorbent have a reduced tendency to foaming and low volatility.