Posted By Robert K Lewis Peter Long time since I had this problem, it was with Raney-nickel catalst back in the 70s. I presume that from your description you are dealing with one which is water tolerant. But do check ths out. They are easier to deal with in many ways as the art is in keeping the material wet/damp during the whole process. This includes the cleaning of the tools scrupulously with damp cloths on a regular basis and especially at every break. Be careful with the water though as it could sluice the material into the ground if you are not careful. The initial preparations are going to involve detailed discussion with the waste transporter and the receiving site. Drums will need sealing at the least but other special requirements may be made by the receiver. I personally preferred the disposable overalls as these could be placed in the disposal drums also. You are going to need to dispose of all clothing, gloves etc with the traces of material adhering. In many ways it is not disimilar to the problems of radionucleid disposal except you need to keep it wet. By the wqy phosphor bronze tools are best for this operation as they do not create sparks. Finally of course always keep adequate extinguishant available for the unforeseen. It may ultimately be easier if the whole pipe section could be disposed of. Without knowing the composition controlled ignition may not be an option. Open the discussions with the gov agencies and the disposal company asap. Bob