Sulfide and ammonia content in regenerated methanol
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What are the reasons for analyzing the sulfur compound and methanol contents in recycled methanol? What factors are related to the level of content? And how should very low levels be controlled?
Ammonia inhibits the regeneration and release of hydrogen sulfide. Experiments have shown that by adding a little hydrochloric acid to methanol before carrying out regeneration, the concentration of hydrogen sulfide can be reduced to very low levels. The common practice is to slightly open the desulfurization recovery valve on the pipeline of the regenerated gas phase at normal temperature (without low-temperature cooling)