COMPOSITION ET PROCEDE PERMETTANT DE RECUPERER ET DE VALORISER DES PRODUITS PETROLIERS

摘要

PCT No. PCT/FR81/00168 Sec. 371 Date Aug. 16, 1982 Sec. 102(e) Date Aug. 16, 1982 PCT Filed Dec. 23, 1981 PCT Pub. No. WO82/02177 PCT Pub. Date Jul. 8, 1982.A composition for recovering and upgrading sludge that accumulates in vessels for storing and transporting petroleum products comprises a solvent made up of at least one aliphatic hydrocarbon and at least one aromatic monohalogenated hydrocarbon of the benzene or naphthalene type, together with a demulsifying and dispersing agent that is an aliphatic straight-chain oxyethylated amineated derivative or a quaternary ammonium compound having at least one alkyl and at least one aryl residue in the form of thiocyano derivative. The composition is dissolved in a hydrocarbon in a proportion of from 2 to 10% by weight, the resulting solution is projected on to the residues at a pressure of from 2 to 15 bars, and the resulting suspension is recycled, recovered, and treated like crude oil. The invention is applied to the recovery and upgrading of sludges which accumulate in storage vessels and petroleum product transport vessels, whether they are on the ground or on land or sea transport vessels.