Patent ID: 7875120
Filing Date: 2011-01-25
Classification: B08B,C10J,E21B

Abstract:
1. A method of cleaning an industrial tank comprising the steps of: (a) transmitting a first RF signal into the tank to heat contents of the tank to a first predetermined temperature; (b) providing a carbon dioxide critical fluid into the tank; (c) transmitting a second RF signal into the tank to heat the contents and critical fluid to a second predetermined temperature in the range of 200 to 250 degrees Celsius; and (d) heating the critical fluid and the contents of the tank to the second predetermined temperature in order to initiate a reaction of an oxidant in the critical fluid with a portion of the contents of the tank thereby causing hydrocarbons and contaminants to be released from the contents of the tank for extraction as a vapor, liquid or dissolved in the critical fluid; wherein the carbon dioxide critical fluid comprises a mixture of carbon dioxide (CO