Solvent Refining, Dewaxing and Extraction

Solvent refining pilot plant services (Murphy Miller Batch Dewaxing Unit, Unit 912, Unit P71, Units 904 and 905)

Process Description:
Solvent refining, which includes solvent dewaxing and solvent extraction, is a process in which a solvent is selected to preferentially remove/isolate target components according to solubility (or lack thereof) in the chosen solvent.

Unit Descriptions:
Batch Dewaxing: The core design specifications for the Murphy Miller Batch Dewaxing Unit (MMBDW) and Unit 912 are as follows:

Maximum Total Charge Volume

Unit Name

Material of Construction

Minimum Temperature

5 L (1.3 gal)

MMBDW

316 Stainless Steel

-31°C (-25°F)

50 L (13 gal)

912

316 Stainless Steel

-31°C (-25°F)

Additional attributes to note:

  • Typically employs a 50/50 MEK-toluene mixture
  • Other solvents or alternative solvent ratios can be used upon request
  • Can generate a dewaxed oil product and a wax product
  • Client may provide their preferred filter media or use Intertek’s stock filter cloth
  • Client may choose the starting temperature of the slurry (oil/solvent mixture), the final slurry temperature, and cool down rate

Continuous Dewaxing:

The core design specifications for Unit P71 are as follows:

Maximum Feed Rate

Unit Name

Material of Construction

Maximum Solvent Rate

Minimum Temperature

3.8 L/hr (1 gal/hr)

P71

316 Stainless Steel

11.4 L/hr (3 gal/hr)

-9°C (-15°F)

Additional attributes to note:

  • One square foot of filter area
  • Typically employs a 50/50 MEK-toluene mixture
    • Other mixtures can be used at the client’s direction
  • Solvent can be supplied at about 3.8 L/hr (1 gal/hr) to the following areas:
    • To the feed upstream of a slurry (oil/solvent mixture) chiller
    • To the feed downstream of a slurry chiller and upstream of the filter drum
    • To the filter drum as wash

Continuous Extraction:

The core design specifications for Units 904 and 905 are as follows:

Feed Rate

Unit Name

Material of Construction

Maximum Temperature

1 L/hr

904

316 Stainless Steel

Solvent boiling point

2 L/hr

905

316 Stainless Steel

Solvent boiling point

Additional attributes to note: 

  • The units operate at atmospheric pressure
  • NMP and furfural commonly used as solvents
  • Batch extraction capabilities (separatory funnels) are available for screening candidate conditions for continuous extraction

Analytical Support:

Analytical types and frequency are performed on an as needed basis to ensure that the customer is getting only what they need and when they need it. In-house analytical support for unit control and external analytical support via the Intertek network of laboratories is as follows:

In-house:

  • D4052 Density
  • D5950 Pour point
  • D445 Kinematic viscosity
  • D1218 Refractive index
  • D721 Oil content
  • D5771 Cloud point
  • D156 Saybolt color

Intertek network:

  • UV aromatics
  • D2007 Hydrocarbon types
  • D2008 UV absorbance
  • D5800 NOACK volatility
  • D6079 Lubricity

Common Project Types:
This unit has been used for both the generation of process data, and also the production of samples (ranging from several liters to multiple drums) which can include:

  • Solvent extraction
  • Solvent dewaxing
  • Wax de-oiling
  • Base oil finishing
 
Need help or have a question? +1 800 967 5352
 

Need help or have a question?

+1 800 967 5352
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+44 1372 370900
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+971 4 317 8777