Abstract: The present invention relates to a process for the treatment of a hydrocarbon charge by high temperature ultrafiltration, said process comprising the steps of circulating said charge in a module comprising at least one mineral ultrafiltration barrier coated with a sensitive mineral layer of at least one metal oxide and of operating at a temperature higher than 100.degree. C. The barrier, which preferably has a ceramic or metallic support, is coated with a sensitive layer selected from the group comprising titanium dioxide, magnesium oxide, aluminium oxide, spinel MgAl.sub.2 O.sub.4, silica. The invention is applicable to the regeneration of a waste oil and to the reduction of the rate of asphaltenes in a hydrocarbon charge.

Abstract: The gases are passed through a cell containing a first solution for dissolving the hydrochloric acid, subjected to coulometric measurement of the chloride ion content Q, passed through a vessel for absorbing the hydrochloric acid and chlorine, the organochlorine compounds contained in the remaining gases being then burnt in a combustion chamber. The combustion gases are passed through a second solution for dissolving the hydrochloric acid liberated by the organochlorine compounds, subjected to a second coulometric measurement of the chloride ion content q, the ratio q/Q being determined by a computer.