Process for breaking emulsions in a tar-containing aqueous condensate
AssigneeMetallgesellschaft Aktiengesellschaft
InventorPaul Rudolph
Life of this patent
Estimating the term…
Abstract
Gravity separation process for removing tar from water in a condensate formed by the cooling of a raw gas produced by the gasification or dry distillation of solid fuel such as coal. The tar and water condensate formed by cooling the raw gas to about 100.degree. C is enriched in a tar-water separator with ammonium carbonate to a concentration of least 5 grams NH.sub.3 per kg H.sub.2 O. The cooling can be carried out in a plurality of stages with the hotter condensate from at least one of the first cooling stages being mixed at a weight ratio of 10:1 to 1:2 with colder condensate from at least one of the succeeding cooling stages.
Claims5
Separation process for removing tar from water in a condensate formed by the cooling of a raw gas produced by the gasification of coal with oxygen and water vapor under a pressure of 20-80 bars, which comprises treating said raw gas in a scrubbing and cooling zone and withdrawing said condensate, enriching said condensate with at least one member of the group consisting of ammonium carbonate and ammonium bicarbonate to a concentration of at least 5 grams NH.sub.3 per kg H.sub.2 O, and separating tar from said condensate in a separation zone.
Separation process for removing tar from water in a condensate formed by the cooling of a raw gas produced by the gasification or dry distillation of solid fuels particularly coal which comprises cooling the raw gas in a plurality of stages, mixing the hotter condensate from at least one of the first cooling stages which is cooled to a temperature above 100.degree. C at a weight ratio of 10:1 to 1:2 with colder condensate from at least one of the succeeding cooling stages, which cools to a temperature below 120.degree. C, and feeding the resulting mixture containing at least one member of the group consisting of ammonium carbonate and ammonium bicarbonate with a concentration of at least 5 grams NH.sub.3 per kg H.sub.2 O to a tar-water separation zone.
Dependencies are inferred from the claim text.