What kinds of impurities can be removed by palm oil refining machine?
Cooking edible palm oils are an essential ingredient for human diet. No food worth taste could be prepared without use of cooking edible oils. Depending on Geographical locations different varieties of oils are popular in different region. Nature has given distinct individual characteristics to all cooking edible oils.
Cooking edible palm oil is very popular in Africa.During cooking edible palm oil refining process ,some impuritiesshould be removed. They are physical impurities,gums and waxes,free fatty acids,colour pigments unpleasant odour and so on.
Widely ussed palm oil refining machine
Basically cooking edible palm oil has following impurities which needs to be removed by palm oil refining machine.
1) PHYSICAL IMPURITIES:
Left over particles of oil seeds etc. By simple filteration process these impurities are removed.
2) PHOSPHATIDES, GUMS AND WAXES:
During pretreatment process gums and other impurities are either separated out, either through batch degumming or through continuous process with help of centrifugal separators. When impurities are only in small quantities Gum conditioning process is adopted, where in gums are just precipitated and are removed in next neutralising process.
3) FREE FATTY ACIDS:
Popularly known as F.F.A. all vegetable oils are compound formed by Glycerin and Fatty Acids when Fatty Acid separates out from the bond with Glycerin they are termed as Free Fatty Acids. The free Fatty Acids are generally removed by neutralising them with alkalies like caustic soda. The soap stock formed and the oil are then separated out by decantation process in Batch Neutralising or by centrifuge separation in continuous Neutralising.
4) COLOURING PIGMENTS:
Depending on the quantity and type of colour pigments present in the oil, oils have colour ranging from light yellow, reddish} to dark brownish (as in crude cotton seed oil). To give uniform, colour it is essential to bleach the oil with the help of bleaching agents like bleaching earth / activated carbon. Bleaching agents absorbs the colouring pigments. By filteration process the spent bleaching agent is filtered out. Sometimes caustic treatment in neutralising section also reduces the colour of oil specifically in cotton seed oil. In case of palm oil colour is also reduced by heat treatment. Bleaching operation is performed either as batch process in smaller capacities or as continuous operation in large capacity plants.
Every oil has its own district odour sometimes pleasing odour sometimes unpleasant odour. Neutralising and bleaching process also adds odour to the oil which is unpleasant. It is therefore essential to remove the odour from oil. Deodorisation is the process to remove odiferous matter from vegetable oils. The odour is removed by injecting open steam in the oil which is heated to high temperature and kept under high temperature and kept under high vacuum. The odiferous matter distills off at high temperature and high vacuum and is carried away through vacuum system. The oils is cooled.
Above was only general information on vegetable oil refining. More detailed commercial and technical informations can be made available on request.
We work for our clients in the following capacity:
1-20TPD batch type cooking edible palm oil refining machine ;
20-50TPD semi-continuous cooking edible palm oil refining machine ;
50-600TPD fully-continuous cooking edible palm oil refining machine ;