abstract |
A method of removing residual material from a conduit comprises introducing an aqueous formulation of a water-soluble polymer, such as polyvinyl alcohol, which is optionally cross-linked into the conduit to contact the residual material and dislodge it. Also disclosed is an assembly comprising a receptacle containing an aqueous formulation of a water-soluble polymer, such as polyvinyl alcohol, which is optionally cross-linked and a conduit which has residual material wherein the receptacle is in fluid communication with the conduit for passage of fluid from the receptacle into the conduit; and a receptacle containing a residue removed from a conduit, e.g. an alkyl benzene, and a water-soluble polymer, such as polyvinyl alcohol, which is optionally cross-linked. |