Description

Bleaching Clay CAS NO 68515-07-1 is a highly effective, naturally occurring or activated aluminosilicate adsorbent widely used for purification and decolorization. Its primary value lies in its ability to selectively remove pigments, oxidation products, and other impurities from various oils and fats, significantly improving their color, odor, and stability. This product is essential for manufacturers in the edible oil refining, biodiesel production, petroleum, and chemical processing industries who require reliable and efficient purification solutions.

Application

• Edible Oil Refining: Primary application for the decolorization and purification of vegetable oils (e.g., soybean, palm, canola, sunflower) and animal fats to meet food-grade standards.
• Biodiesel Purification: Removal of color bodies, soaps, catalysts, and glycerin from crude biodiesel to produce a clear, high-quality final fuel.
• Mineral Oil & Lubricant Processing: Clarification and improvement of color and stability in base oils, white oils, paraffin waxes, and industrial lubricants.
• Chemical & Pharmaceutical Intermediates: Purification of organic intermediates and solvents by adsorbing colored impurities and unwanted by-products.
• Waste Oil & Fat Re-refining: Key component in processes to regenerate used cooking oils, transformer oils, and other waste streams for reuse.
• Fatty Acid & Wax Bleaching: Treatment of stearic acid, oleic acid, and various natural and synthetic waxes to achieve desired color specifications.

Basic Information

Product Name	Bleaching Clay
CAS No.	68515-07-1
Molecular Formula	Complex aluminosilicate (primarily Montmorillonite)
Molecular Weight	N/A (Variable mineral composition)
Synonyms	Activated Bleaching Earth; Bleaching Earth; Fuller's Earth (Activated); Activated Clay; Decolorizing Earth; Adsorbent Clay; Activated Montmorillonite; Oil Bleaching Clay; Decolorizing Clay; Purifying Clay; TONSIL; FLORISIL (related silica-based adsorbent)
EINECS	271-128-4

Quality Control

Our Bleaching Clay is manufactured under strict quality protocols to ensure batch-to-batch consistency and high performance. Quality is verified through a series of tests including decolorizing power, filtration rate, moisture content, particle size distribution, and free moisture analysis. While typically produced to industrial-grade specifications, production can be adjusted to meet specific customer requirements. A Certificate of Analysis (COA) is provided with each shipment to guarantee compliance with agreed specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and must be kept in its original, unopened packaging until use to prevent adsorption of atmospheric moisture, which can reduce its activity. Keep away from strong acids and oxidizing agents.

Specification

Item	Specification
Appearance	Fine, free-flowing powder
Color	Off-white to light cream
Decolorizing Power (Standard Oil Test)	> 90% (or to customer requirement)
Moisture Content	< 12%
Particle Size (-200 mesh)	> 90%
pH (10% slurry)	3.0 - 7.0 (Acid-activated type typically 3.0-5.0)
Free Moisture (as packed)	< 10%
Bulk Density	0.5 - 0.8 g/ml

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.