Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment
Reexamination Certificate
2005-08-16
2005-08-16
Carrillo, Sharidan (Department: 1746)
Cleaning and liquid contact with solids
Processes
Hollow work, internal surface treatment
C134S020000, C134S021000, C134S022110, C134S022120, C134S022150, C134S022180, C134S026000, C134S030000, C134S031000, C134S034000, C134S036000, C134S039000, C134S042000
Reexamination Certificate
active
06929015
ABSTRACT:
The invention proposes a process and device for the at least partial elimination of carbon deposits in a heat exchanger in which an oxidation treatment is carried out comprising at least one controlled-oxidation stage at a conventional temperature between 400 and about 500° C. for a period of at least 4 hours, by means of an oxidizing fluid comprising for the greater part an inert gas, and a lesser quantity of oxygen, under conditions such that the temperatures of the fluids feeding or leaving the heat exchanger remain below about 520° C. throughout the oxidation treatment, and in that the hot approach of the exchanger remains below about 120° C. throughout the oxidation treatment. The invention also relates to a hydrotreatment system for the implementation of this process and this device.
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Nastoll Willy
Sabin Dominique
Institut Francais du Pe'trole
Millen White Zelano & Branigan P.C.
Packinox, S.A.
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