The Next Regeneration

Recovery By Distillation

The chemical industry is constantly seeking alternatives to the escalating cost of disposal for its by-products, especially when they contain expensive residual products or raw materials.

Recovery of these valuable chemicals can be achieved by separating them from the rest of the waste, either for direct process re-use or conversion into useful intermediates, adding value and preserving energy and resources.

The two main facilities Midland Oil can provide are:

-The Luwa wipe film evaporator which operates over a wide range of temperature and vacuum conditions, with short contact times for thermally sensitive materials

-The Short path distillation unit (SPDU) which can accomodate volumes down to five litres and is ideally suited to the recovery of silicone oils, oxometalic complexes and essential oils.

The Luwa wipe film evaporator and pilot plant

  • The Luwa produces  up to 20 tonnes per day of product
  • It operates at a high vacuum and high temperature
  • It is very versatile
  • Limitations are flash point > 32 Celsius and solids
  • A minimum load size of 20 tonnes is needed for the Luwa
  • The pilot plant produces 5kg – 10 kg per hour
  • It is used to handle smaller quantities. (From25 kg to 10 tonnes)
  • The lab unit can produce gram and kilo quantities
  • Toll distillation is the most common route
  • Some buy/sell does take place
  •  Typical chemicals which can be recovered include:
    • Glycols
    • Glycol ethers
    • Poly glycols
    • Phosphate esters
    • Hydrocarbon oils
    • Chlorinated paraffins
    • Process chemicals e.g. Sulfinol
    •  Silicone oils
    • Essential oils
    • Naphthenic acid
    • Succinic anhydride derivatives
    • Solvents (Including Estisol 242)
    • Printing industry – Blanket wash
    •  White spirit
    • Heat transfer fluids
    •  Iso dodecane
    • Precious metal recovery (Rhodium)

Any chemical (However described – by product, waste stream, distillation bottom side stream or residue) with a flash point above 32 Celsius is a potential for the Luwa.

Samples are again the key in assessing the viability of the project.