Patent ID: 7967895

Claim:
A process for regenerating loaded washing agent from a physical gas wash, said loaded washing agent comprising methanol, hydrogen cyanide and sour gases, said process comprising in a scrubbing column, separating hydrogen cyanide (HCN) from a raw synthesis gas in a first washing step with a washing agent comprising methanol and dissolved sour gases, separating remaining sour gases and/or carbon dioxide from said raw synthesis gas in at least one subsequent washing step by liquid cryogenic methanol, said liquid cryogenic methanol being used in a major amount compared to a minor amount being used in said first washing step, and withdrawing said major amount containing said remaining sour gases and/or carbon dioxide from the scrubbing column, withdrawing a methanol washing agent loaded with HCN from the methanol wash and expanding into a stripping column independently of the remaining quantity of loaded washing agent, generating a gas stream containing HCN by stripping in the stripping column, and feeding said gas stream to a Claus plant and combusting therein.