Bleacher

Bleaching Process is the third step in vegetable oil refining which commences after complete of effective neutralization process. Bleacher Pressure Vessel is used to carry out the Bleaching Process. A Bleacher is careful designed equipment based on design parameters to ensure perfect bleach-ability of the crude oil. The process has its own importance.

The purpose of Bleaching is to remove the color pigments contained inside Vegetable Oils. The neutralized oil is heated at additional temperature through thermic boilers to ultimately raise the temperature of oil upto 120 C to 130 C. The oil is then treated with Bleaching Clays that adsorb the color pigments. The addition amount for bleaching clay varies from oil to oil. It also depends on the color content of the crude oil and the desired quality oil color index.

Following parameters are crucial while performing the Bleaching Process:

• SELECTION OF CLAY TYPE
• PH AND FREE MOISTURE CONTENT IN THE CLAY
• ACTIVATED OR NON-ACTIVATED
• SURFACE AREA AND POROSITY
• SURFACE ACIDITY
• PARTICLE SIZE DISTRIBUTION
• THE DOSAGE QUANTITY
• BLEACH-ABILITY INDEX

The process variables such as moisture levels, temperature, contact time, vacuum are reliant parameters in oil purification process to determine achieve high quality refined oil product.