Polyphenylene ether (PPE) is a special thermoplastic material. It is used in blends- by compounding with other plastics (HIPS, PA6, PA66, etc.) a thermoplastic material with excellent properties is received. These materials are processed preferably by injection moulding and the parts are used mainly in electrotechnics, computer, car and other industries.


Based on the CHEMINVEX’s (now CHEMOPROJEKT CHEMICALS s.r.o.) licence, Chemoprojekt, a.s put into operation new 10 000 MTPY PPE Plant in Ruicheng, China in the year 2004. Chemoprojekt, a.s. provided extended Basic Design, procurement, consultancy, supply of proprietary equipment and supervision at the site and during commissioning period.
The licence for PPE production is held by CHEMINVEX (now CHEMOPROJEKT CHEMICALS s.r.o.), Czech Republic. The PPE process consists of the following main steps: Polymerization, Filtration & Washing, Drying & Storing and Solvents recovery. Polymerization of the monomer, 2,6-xylenol, takes place in the stirred batch reactor where the of catalytic polycondensation by Oxygen takes place. The reaction mixture then proceeds via the maturation vessel to the rotary pressure filter, where all soluble reaction by products and the rest of the catalyst are washed off the filter cake in several steps. Drying of the wet PPE cake takes place in the drier by heating in closed loop of nitrogen. Dry PPE powder is then stored in the silos. All solvents are recovered in the recovery unit in a complex manner so that only little waste is produced. The other common utilites are consumed – electric power, cooling water, steam and nitrogen for nitrogen blanketing system.