Total Raffinage Distribution S.a.

Compagnie De Raffinage Et De Distribution Total France

Patrice Herrenschmidt

Thierry Patureaux

Claude Marty

Marc Durrieu

Francedillaois-Xavier Cormerais

A process for the simultaneous replacement of a first catalyst by a second catalyst which first catalyst is circulating as a moving bed of solid particles in a hydrocarbon treating unit, which unit comprises at least one processing reactor. The first catalyst is withdrawn downstream of the reactor, or of each reactor, in the direction of catalyst circulation. The second catalyst is simultaneously injected upstream of the reactor or of each reactor. The bulk density of the material withdrawn downstream of the reactor, or of each reactor, is measured continuously. The withdrawal of the first catalyst and the injection of the second catalyst into the reactor concerned are interrupted when the bulk density so measured is equal to that of the second catalyst.

Process and apparatus for the continuous replacement of the catalyst in

The invention relates to a water-soluble demulsifying and antifouling agent capable of separating possibly emulsified water/hydrocarbon mixtures, and particularly water/crude petroleum mixtures containing suspended matter. Said agent comprises from 10 to 60 percent by weight of a combination of the following compounds:

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Le Pecq, France

Patrice Herrenschmidt