Patent ID: 8138382

Claim:
A method for producing mixed gas hydrate comprising the steps of: (1) forming a gas hydrate in slurry form by the reaction between a mixed gas containing a principal component and at least one other component, and water; (2) removing water from the gas hydrate in slurry form; (3) pelletizing the gas hydrate after removing water therefrom to form pellets; (4) freezing the gas hydrate in pellet shape by chilling to at or below the freezing point thereof; and (5) depressurizing the frozen gas hydrate to a storage pressure, wherein a diluent gas in the form of the principal component of the mixed gas is added to the mixed gas to be supplied to said step of forming the gas hydrate, and then the components of the mixed gas other than the principal component are diluted, and thus the mixed gas hydrate is produced by the diluted mixed gas.