High Viscosity

High Viscosity Processing

About Us

LIST is the worldwide leader in dry processing technology. For more than 40 years, we have focused on developing solutions that enable our customers to process more efficiently and effectively without the use of solvents. Today, LIST’s innovative kneader reactor solutions for processing sticky, viscous, and crust-forming products play a key role in the polymer, chemical, food and fiber industries.

Headquartered in Switzerland and with offices in the United States, Singapore, Japan, and Germany, LIST addresses the specific challenges of dry processing materials in the concentrated phase:

  • Achieving reactions or mixing operations with no, or very little, solvent
  • Drying a variety of materials - include those considered difficult to handle - that exhibit a wide range of consistency and flow characteristics
  • Achieving multi-phase processing within a single unit that combines mechanical, chemical, and thermal processing.
  • Meeting the high volume production demands of today’s batch and continuous operation systems.
  • Accommodating a range of residence times while achieving narrow residence time distribution, in order to maximize product quality

Industry Contributions

Our efforts in addressing these issues have yielded some of the most important innovations in the dry processing industry:

  • LIST is credited with developing the first continuous reaction processor for super absorbent polymers.
  • We engineered the first production-scale processor for continuous vacuum drying and crystallization of sugar substitutes.
  • LIST created the first continuous vacuum evaporator for TDI recovery from distillation residue.
  • Our continuous devolatilizers for elastomer/solvent solution is considered a breakthrough.

Engineering and Testing

At the LIST pilot plant facility in Arisdorf, Switzerland, an experienced and multi-disciplinary staff is engaged in designing and testing the next generation of process technologies. The focus is not only on developing new solutions, engineers are continually designing alternative applications, evaluating new technologies, and testing new, more advanced materials to improve our customers’ current processes as well.