explain each process im small paragraph

Fluidized bed polymerization (gas phase polymerization) is the most flexible method Figure 11.12 Union Carbide Unipol process for the production of HDPE and L.I.DPY. Solution polymerization of ethylene, using Ziegler-Natta catalysts Process Flow Diagram of Formaldehyde Fig. 1. Flow scheme of a typical silver catalyst process, S= steam; CW= cooling water