Patent · US Active

Method for regenerating a toxified catalyst containing ruthenium or ruthenium compounds

US11389791B2 · kind B2 · utility

0Cited by

6References

19Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Andre RITTERMEIER · Leverkusen, DE
Michael Alan Venz · Rochester, US
Thomas BURBACH · Dietzenbach, DE
Timm Schmidt · Kaarst, DE
Tim Loddenkemper · Dormagen, DE
Frank Gerhartz · Leverkusen, DE
Walther Müller · Pulheim, DE

Key dates

Filing date	May 14, 2018
Grant date	Jul 19, 2022
Priority date	—
Expiry date	Jan 7, 2039

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/584
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for regenerating a catalyst containing ruthenium or ruthenium compounds, which includes, optionally at elevated temperature, subjecting the catalyst to a hydrogen halide treatment, particularly a gas stream comprising hydrogen chloride, under non-oxidative conditions and, optionally at reduced temperature, to at least a two-stage oxidative post-treatment. The catalyst may have been poisoned by sulfur compounds. After the removal of sulfur, the catalyst is subjected to an oxidative post-treatment.

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