Method and apparatus for separating carbon dioxide and other acid gases from methane by the use of distillation and a controlled freezing zone

摘要

The invention relates to method and apparatus for separating carbon dioxide and other acid gases from methane by treating the feedstream in at least one distillation zone and a controlled freezing zone. The freezing zone produces a carbon dioxide slush which is melted and fed into a distillation section. The apparatus used to practice the process is preferably in a single vessel.