Polypropylene PP production process

China's medium and small-scale PP production facilities rely on domestically-manufactured dry-process liquid phase small-bulk processes, and large-scale polypropylene (PP) production facilities rely mainly on imported technologies, mainly including tank-type reactor liquid phase bulk-gas phase bulk Hypol process. (Mitsui Chemical Technology) and loop-tube reactor liquid phase bulk-gas phase bulk combination Speripol process (formerly Himont Corporation, now Basel Corporation). The average size of domestic installations is less than 60,000 tons/year, the largest is 200,000 tons/year, and the smallest is only 10,000 tons/year; while the PP units in developed countries in Europe and America are mostly 20-45 million tons/year.

Polypropylene is produced by three methods: slurry method, liquid phase bulk method, and gas phase method.

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