Method and apparatus for removing mercaptans from syngas

The invention relates to a method and an apparatus for removing mercaptans from syngas. Thiol and optionally thiophene and carbon disulfide are absorbed in a specialized absorption stage using methanol as a physical absorption medium. At least the methanol loaded with mercaptans is removed from mercaptans in a stripping phase using methanol vapor as stripping gas, and the mercaptans containing methanol vapor are removed from methanol in a scrubbing phase. The process according to the invention minimizes methanol loss and the amount of coolant required for the process. 本发明涉及用于从合成气中去除硫醇的方法和设备。硫醇以及任选地噻吩和二硫化碳在专门的吸收阶段使用甲醇作为物理吸收介质被吸收。至少负载有硫醇的甲醇在汽提阶段使用甲醇蒸气作为汽提气体被除去硫醇，并且含有甲醇蒸气的硫醇在洗涤阶段被除去甲醇。根据本发明的方法使甲醇损失和该方法所需的冷却剂的量最小化。