- Allen Filters Incorporated
 - Offers a full line of industrial oil filtration, recycling, and reclamation equipment. - COMO Industrial Equipment
- Manufacturers of filters, filtration systems, coalescers, skimmers, reclamation, and recycling equipment for industrial oil and water based fluids. (hydraulic, coolants, quench, etc.)
- Eadie Oil, Inc.
- We have developed a process technology for partially upgrading heavy oil. The process may also be used for recycling used lubricating oil to #2 diesel.
- Emulsions Control
- Produces demulsifiers for the separation of oil, water and solids.
- H.O.D., Inc.
- Specialises in products for the above ground storage, management and recycling of waste/used oil.
- Midwest Custom Chemical
- Develops a line of chemicals to solve oil demulsification and water treatment problems.
- Separation Dynamics, Inc.
- Manufacturer of oil and water separation system for recycling water and water-soluble cleaning agents.
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