Energy efficient scrubbing of sulfur compounds from moist gaseous mixtures

Patent · Tue Jun 01 04:00:00 EDT 1982

OSTI ID:6306465

Ranke, G; Siegert, F

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* 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.

• Assignee: Linde Ag (Germany, Federal Republic Of)
• Patent Number(s): US 4332596
• OSTI ID: 6306465
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
ABSORPTION
ALCOHOLS
AROMATICS
CARBON COMPOUNDS
CARBON OXYSULFIDE
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
COOLING
DESULFURIZATION
EFFICIENCY
ENERGY
ENERGY EFFICIENCY
FLUIDS
GASES
HEAT
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROXY COMPOUNDS
LOW PRESSURE
METHANOL
MOISTURE
ORGANIC COMPOUNDS
POLLUTION CONTROL
QUANTITY RATIO
RECYCLING
REGENERATION
REMOVAL
SCRUBBING
STEAM
SULFIDES
SULFUR COMPOUNDS
TOLUENE
XYLENES