Method for regenerating a toxified catalyst containing ruthenium or ruthenium compounds
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United States of America Patent
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Jul 19, 2022
Grant Date -
May 27, 2021
app pub date -
May 14, 2018
filing date -
May 19, 2017
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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.
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