Abstract: A process for the recovery and recycling of unreacted monomer in a one-step process for the production of a carbon-fiber precursor. An integrated and improved single-step process for the production of a carbon-fiber precursor is also described, which starts from the co-monomers and reaches the spinning step obtaining the final precursor fiber, which provides for the recovery of the unreacted monomers at the end of the polymerization step and their recycling to the polymerization process itself.

Abstract: A mobile roof safety device and method of use for arresting the fall of a roof worker off an elevated flat roof is described. The mobile device comprises a displaceable frame having a weighted base adapted to be positioned on a flat roof surface for restraining a load. At least one actuable surface gripping assembly having a pivoting arm to which a safety line is attached for the engagement of a gripping formation is secured to the weighted base. When a pulling force is applied on the pivot arm by a worker attached to the safety line secured to the pivot arm, the gripping formation is biased in the flat roof surface to arrest the fall of the worker.

Abstract: A mobile roof safety device and method of use for arresting the fall of a roof worker off an elevated flat roof is described. The mobile device comprises a displaceable frame having a weighted base adapted to be positioned on a flat roof surface for restraining a load. At least one actuable surface gripping assembly having a pivoting arm to which a safety line is attached for the engagement of a gripping formation is secured to the weighted base. When a pulling force is applied on the pivot arm by a worker attached to the safety line secured to the pivot arm, the gripping formation is biased in the flat roof surface to arrest the fall of the worker.