Flow diagram showing the LLDPE solution process

The fluidised bed reactor used for the production of LLDPE is the same as for the production of HD PE described above in Section 3.2.3.2 and is not described again. A number of fluidised bed reactor plants are designed to produce both HDPE and LLDPE according to market requirements but, in general, plants tend to operate and produce one t)q)e only. 

Catalyst Ziegler or metallocene Ziegler-Natta or metallocene 

Most of the processes applied for the production of polypropylene are very similar to the ones used to produce high density polyethylene. Nevertheless, this section describes the most important and most widely used processes for the production of polypropylene. Generally, two different types of processes are apphed in the production of polypropylene  

The traditional suspension processes using an organic diluent, are known within the PP nomenclature as slurry processes. Modem suspension processes use a liquid monomer instead of a solvent. And they are known in the PP world as bulk processes. 

The further development of the catalysts used for polypropylene synthesis had far-reaching consequences for process development. Due to the development of new processes based on the possibilities offered by the new catalysts and the changing range of properties of polymers, the development of catalysts for polypropylene synthesis will be briefly described  

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Figure 3.12 Flow diagram showing the LLDPE solution process...

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