Patent ID: 8586798

Claim:
A heat transfer medium, comprising: an ionic liquid composition comprising a phosphonium based cation of the formula: and; one or more anions comprised of any one or more of the following: − O 3 SCF 3 , − O 2 CCF 3 , − O 2 CCF 2 CF 2 CF 3 , CF 3 BF 3 − , C(CN) 3 − , PF 6 − , NO 3 − , − O 3 SCH 3 , BF 4 − , − O 3 SCF 2 CF 2 CF 3 , − O 2 CCF 2 CF 3 , − O 2 CH, − O 2 CC 6 H 5 , − OCN, CO 3 2− , or − N(CN) 2 .