Patent · US Active

Treatment of hydrogen sulfide

US9845539B2 · kind B2 · utility

1Cited by

15References

38Claims

0Family size

Inventors

C. Deane Little · Niwot, US
Joseph V. Kosmoski · Longmont, US
Yongan Yang · Irvine, US
Ryan O'Hayre · Stanford, US
Tim Olson · Albuquerque, US

Key dates

Filing date	Dec 20, 2013
Grant date	Dec 19, 2017
Priority date	—
Expiry date	Dec 20, 2033

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2257/304
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A chemical process captures and convert hydrogen sulfide (H2S) gas into elemental sulfur, polysulfide, sulfur dioxide and/or sulfuric acid while regenerating sodium hydroxide capture agent for further use in an initial H2S capture step. Processing may include initial sodium hydroxide scrubbing of gas streams containing H2S, electrochemical regeneration of the sodium hydroxide from sodium hydrosulfide or sodium sulfide, recovery of sulfur and/or sulfur dioxide from the electrochemical processing, and production of sulfuric acid from such sulfur and/or sulfur dioxide.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.