Bleaching\dyeing
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1. OBJECTIVE
The objective of bleaching is to remove pigments, metals, e.g. nickel or iron from other oil refinery process; residual soaps and phospholipids from the oil or fat (BAT in the Food, Drink and Milk Industries, June 2005).
The objective of dyeing is an uniform coloration of fibres or paper surfaces by adding dyes, pigments, and optical brighteners.
2. FIELD OF APPLICATION
Bleaching is a process which is carried out in different industries, such as foodstuffs and textiles.
Dyeing is a process which is applied in the paper and textiles industry.
3. DESCRIPTION OF TECHNIQUES, METHODS AND EQUIPMENT
Table 1: Bleaching
4. RELEVANT PARAMETERS TO ENERGY
- Temperature
- Pressure
- Medium
- Material characteristics (e.g. temperature sensitivity)
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