Patent ID: 7655820

Claim:
A method for producing a clathrate having improved stability which comprises mixing and/or kneading a solid host compound with a solid or liquid guest compound, the solid host compound being selected from tetrakisphenols, and the solid or liquid guest compound being selected from imidazoles, and comprising at least one of the following steps: (a) holding the clathrate at a temperature of between about 50° C. and 170° C. for 1 to 6 weeks; (c) pulverizing the solid host compound by a jet stream prior to mixing and/or kneading; or (d) adding a poor solvent in an amount of between 200 ml and 1000 ml to a mole of the solid host compound prior to mixing and/or kneading, the poor solvent being a solvent that dissolves 1 g/100 ml or less of the solid host compound and the solid or liquid guest compound at room temperature.