The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 01, 1982
Filed:
Jun. 13, 1980
Gerhard Ranke, Pocking, DE;
Friedrich Siegert, Wolfratshausen, DE;
Linde Aktiengesellschaft, Wiesbaden, DE;
Abstract
In the selective removal of sulfur compounds, e.g., H.sub.2 S, COS, from moist gaseous mixtures, comprising scrubbing the gaseous mixture in a column at a temperature below 0.degree. C., with toluene or xylene as the scrubbing liquid, and prior to the scrubbing stage, contacting the moist gaseous mixture with liquid methanol before the gaseous mixture is cooled to the scrubbing temperature, passing the scrubbing liquid containing absorbed sulfur compounds to a thermal regenerating column, and recycling resultant thermally regenerated scrubbing agent to the scrubbing stage, the improvement of maintaining a methanol concentration of above 2%, e.g. 3-8% to about 30% by weight in the scrubbing liquid to be recycled from the sump of the thermal regenerating column to the scrubbing column. This permits a lower reboiling temperature in the regenerating column so that low pressure steam can be used, among other advantages.