Processes

Physical Recycling

Recycling process in the context of polymer recycling

Solvent-based processes, with plastics dissolved in solvents, enable the recycling of currently non-recyclable plastic compounds. With the LIST process, polymers can be recovered after selective dissolution. The solvent is gently separated from a polymer solution, the polymer is recovered, and the solvent is condensed. A residual solvent content of less than 300 ppm can be achieved.

Your material

  • LDPE

  • HDPE

  • Composite Materials

  • PS

  • Polyester

  • PET

Our Solution

  • Proven technology for separating solvents from solutions and viscous polymer melts

  • High product purity, high yields, continuous operation

  • Advanced process control:

    • Uniform defined shear input for efficient and gentle separation of the solvent to protect the product
    • Temperature control through evaporation cooling driven by mechanical dissipation and contact heat
    • Homogeneous product temperature and concentrations due to excellent interfacial renewal and mixing

  • Fouling-free reactor design and trouble-free continuous discharge of the polymer

  • Safe evacuation of the vapors without product entrainment resulting in simple and stable process control

  • Extensive testing facilities in our test centers in Switzerland and Korea, for targeted process development

  • Industrialization experience for scales up to 10 t/h polymer solution

Devolatilizer

1
  • interconnected gas headspace, large vapour cross sections
2
  • large heated surface
  • fouling-free, self-cleaned
  • low shear input, high-residence time
  • plug flow design, defined residence time
3
  • viscous discharge

Evaporator

1
  • viscous or solid discharge
2
  • large heated surface
  • fouling-free, self cleaned
  • robust all-phase design

Optional Repolymerizer

1
  • high viscous discharge
2
  • large heated surfaces
  • low vacuum design
  • high torque, high IV design
  • forced mixing, forced surface renewal

Would you like to learn more about plastic recycling?

More about us

LIST KneaderReactor

Where viscosity cannot be a limitation. LIST kneader reactors operate in the concentrated phase—self-cleaning, vacuum-compatible, and capable of handling the highest energy inputs. From lab-scale kneaders to large-scale industrial plants, for the chemical, fiber, polymer, and recycling industries.

Service

LIST services ensure maximum plant availability through maintenance, modernization, and technical support throughout the entire lifecycle.

About Us

The BUSSLIST Group combines three process technologies that cover the most demanding stages of material processing—from high-viscosity reactions and temperature-sensitive compounding to precise solidification.