Transformer Oil Regeneration: Fuller’s Earth Clay Treatment, Acid-Clay Process, and ION Exchange for Restoring Aged Insulating Oil to New Oil Specifications

Transformer oil ages through oxidation, producing acids, sludge, and polar compounds that increase dissipation factor and reduce dielectric strength. Oil regeneration chemically restores aged oil to near-new specifications at 10-20% of replacement cost. Regeneration removes oxidation products while preserving the base hydrocarbon structure.

Fuller’s Earth Adsorption

Fuller’s earth (activated bentonite clay) adsorption is the most common regeneration method. Clay columns with surface area exceeding 200 m²/g adsorb acids, aldehydes, ketones, peroxides, and metal soaps. Clay consumption is 1-3% of oil weight per pass; multi-pass treatment achieves IFT recovery above 40 dynes/cm and acidity below 0.03 mg KOH/g.

Acid-Clay and ION Exchange

The acid-clay process uses sulfuric acid precipitation followed by clay percolation for severely degraded oil with acidity above 0.5. Modern Ion exchange resin systems provide continuous regeneration without solid waste disposal.

Equipment

The Oil Regeneration System provides clay-based regeneration. The Double Stage Purifier pre-treats oil. Oil Testing verifies regeneration results. The Oil Filter Press provides post-regeneration filtration. The Hydraulic Oil Filter Press services associated equipment.

Related Products:
– GIS Partial Discharge Online Monitoring: UHF, Acoustic, and HFCT Sensing Technologies for Gas-Insulated Substation Reliability
– Quick Couplers for Excavators: Maximizing Attachment Versatility and Job Site Efficiency
– Oil Purification and Lubricant Filtration: Filter Press Technology for Transformer Oil, Hydraulic Oil, and Industrial Lubricants
– Excavator Shears for Structural Demolition: Hydraulic Cutting Force, Jaw Geometry, and Steel Processing Capacity for Bridge and Building Teardown