Mineral oil refining lines with a chemical system

Alexandria Engineering Industries offers advanced mineral oil refining lines based on chemical refining technology, designed to effectively purify used or virgin mineral oils—such as lubricating oils, industrial oils, and transformer oils—through controlled chemical treatment processes.

Unlike physical or adsorption-based methods, the chemical refining system utilizes reagents (such as sulfuric acid, caustic soda, or specialized chemical additives) to remove impurities including oxidation products, sludge, resins, asphaltenes, and acidic compounds.

Key Features:

• Chemical Treatment Process:

  • Acid refining: Sulfuric acid or other acidic agents neutralize and precipitate contaminants.
  • Alkali washing: Caustic soda (NaOH) solution removes residual acids and soaps.
  • Demulsification & settling: Facilitates separation of chemical sludge and water phases.

• High Impurity Removal Efficiency:
  Effectively eliminates polar compounds, aging by-products, and dissolved contaminants that physical filtration cannot address.

• Integrated Neutralization & Washing Stages:
  Ensures complete removal of chemical residues to meet quality and safety standards.

• Sludge Management System:
  Includes separation tanks and handling units for safe disposal or further processing of chemical sludge.

• Corrosion-Resistant Construction:
  Reactors, mixers, and piping are built from acid-resistant materials (e.g., special alloys or lined carbon steel) to withstand aggressive chemicals.

• Automated Dosing & Control:
  PLC-controlled chemical injection, mixing time, temperature, and pH monitoring for consistent, repeatable results.

• Compliance & Safety:
  Designed with safety interlocks, fume extraction, and emergency neutralization protocols to meet OSHA and environmental regulations.

Applications:

• Re-refining of heavily degraded used lubricating oils
• Purification of industrial oils with high oxidation or contamination levels
• Pre-treatment for oils prior to final clay filtration or vacuum distillation
• Facilities requiring deep chemical regeneration of mineral oils

Advantages of Chemical Refining:

• Superior removal of soluble contaminants and aging products
• Effective for oils with high Total Acid Number (TAN) or sludge content
• Proven technology for challenging feedstocks