Comprehensive PET Recycling Solutions

Chemical Recycling:

1.0- Waste Addition to Slurry System Technology
PET waste, such as 3A waste bottle flakes or chips, waste fibers (powdered), etc., is added to the paste
preparation tank of a virgin polyester plant. The mixture is then sent to the esterification 1 reactor, where
EG is used to chemically depolymerize the PET waste. The resulting recycled BHET (r-BHET) and virgin
BHET are thoroughly mixed before entering esterification 2 reactor for further esterification. The esterified
product is then sent to the polycondensation system for polycondensation, ultimately producing the
recycled r-PET polymer. After being delivered and filtered by the melt pump, it is sent to the pelletizer or
downstream for spinning.

OBHE has achieved industrial stable production on a 300 TPD continuous polymerization plant.

2.0- Waste Melting Addition Technology
Using a twin-screw extruder, 3A waste bottle flakes or chips, waste films, and waste fibers (friction materials)
are melted. The melt is then added to esterification 1 reactor or the polycondensation reactor, where
it is fully mixed and reacted with virgin polyester to generate the recycled r-PET polymer. Finally, the melt
is delivered and filtered by the melt pump before being sent to the pelletizer or downstream for spinning.

3.0- Waste Alcoholysis Addition Technology
Waste PET materials such as bottle flakes or chips, waste fibers, and waste fabric popcorn material are
added to the alcoholysis reactor for chemical alcoholysis. The resulting r-BHET is then transferred to
esterification 2 reactor, where it is thoroughly mixed and reacted with virgin polyester to generate the
recycled r-PET polymer. Finally, the polymer is delivered and filtered by the melt pump before being sent
to the pelletizer or downstream for spinning.

Process route:

Process Route: The process involves ethylene glycol alcoholysis of PET wast esuch as waste fabric, waste fibers, and off-spec flakes, producing refined r-BHET. The r-BHET is then polymerized to generate polyester melt, which is sent downstream for direct spinning or pelletized into r-PET chips via a pelletizer.

Process Flow: