| 摘要 |
<p>An apparatus for use in a process of removing a material from a substrate comprises a separator 2 having a first inlet 6 through which solvent may be added and a second inlet 26 through which the substrate may be introduced, the apparatus being arranged for intimate contact of the solvent with a substrate. The apparatus also comprises units 12, 34 for collecting the charged solvent with the material and for collecting the substrate after material has been extracted therefrom. The apparatus suitably comprises a recirculation system to return solvent to the first inlet after extraction of material from the substrate. The apparatus suitably also comprises a C1-C3 fluorinated hydrocarbon, for example 1,1,1,2-tetrafluroethane, in the separator 2. <IMAGE></p> |
