The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 07, 1987
Filed:
Jul. 03, 1985
Jean-Pierre Belluteau, Noisy le Rio, FR;
Christian Bocard, Orgeval, FR;
Christian Such, Orsay, FR;
Daniel Vaillant, Antony, FR;
Institut Francais du Petrole, Rueil-Malmaison, FR;
Laboratoire Central des Ponts et Chausses, Paris, FR;
Abstract
A method and a device usable in particular for washing solid products contaminated by hydrocarbons. According to this method, a desorbent liquid phase is used to wash solid products which are brought into contact with this desorbent liquid phase forming a mixture consisting of solution, desorbed hydrocarbons and washed products. Said mixture, freed from gravel, undergoes at least one separation stage, this separation giving a underflow comprising at least the major part of the washed sand and an overflow from which the hydrocarbons and the aqueous phase are recovered. This method is applicable to de-oiling oil-contaminated sands and gravels.