The present invention is an apparatus for introducing a dry material into a fluid stream in a way that ensures a predictable, highly accurate and consistent application of the material. In particular, the methods use thermolytic degradation concurrently with a distillation process to obtaining distilled waxes from recycled polyethylene. The cannula includes a hollow elongated structure having a proximal end opening and a distal end opening leading to a hollow interior passage dimensioned to receive a surgical instrument.