C - Chemistry – Metallurgy – 10 – K
Patent
C - Chemistry, Metallurgy
10
K
48/46
C10K 1/08 (2006.01)
Patent
CA 1053903
ABSTRACT OF THE DISCLOSURE: A process of purifying raw gases produced by gasifica- tion of solid or liquid fossile fuels by treatment with water vapor and oxygen under superatmospheric pressure, in order to re- move catalyst-deteriorating impurities, such as mono- or polyun- saturated hydrocarbons, mercaptans, HCN, HC1, H2S, CS2, COS, and NH3, and to desulfurize the gases, while producing an exhaust gas which is rich in H2S, which process comprises indirectly cool- ing at ambient temperature the raw gas, which is available at a temperature of 150-170°C, separating and removing the condensible hydrocarbons, subsequently scrubbing that gas with water to re- move ammonia in a first scrubbing stage, in which the water rate is controlled to be just sufficient to remove the ammonia, then scrubbing the gas with a high-boiling organic solvent, which is miscible with water and to which sulfur is added, in a second scrubbing stage, in which the solvent rate is controlled in de- pendence on the solubility of the methylmercaptan, which is to be removed, in the solvent, and subsequently scrubbing the gas with the same solvent in a third scrubbing stage, in which the water content of the solvent, is kept at 5-30 mole percent H2O and in which H2S and COS are entirely and selectively removed from the gas, the scrubbing agents from the second and third scrubbing stages being separately regenerated and recycled to the second and third scrubbing stages for re-use, characterized in that it further comprises flashing approximatively to atmospheric pres- sure the scrubbing agent which has been used in the second scrub- bing stage, adding water, if desired, heating the scrubbing agent heated to the boiling temperature but not in excess of 170°C, then treating that scrubbing agent in a stripping column with wa- ter vapor or stripping gas to remove the volatile impurities, where- after the mixed vapors are condensed, isolating the condensates by phase separation, and feeding a part of the aqueous phase as a reflux to the upper portion of the stripping column while cooling the stripped scrubbing agent and feeding it back to the top of the second scrubbing stage.
231110
Bratzler Karl
Doerges Alexander
Kriebel Manfred
LandOfFree
Process for purifying gases produced by gasification of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for purifying gases produced by gasification of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for purifying gases produced by gasification of... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1113647