Palm oil = oil extracted from plam fruit.

Palm oil (kernel) = oil extracted from palm seed

“Crude” is the word used in Oil & Gas industry.

Unrefined = is the word used in domestic or kitchen or food oils (palm oil, vegetable oil, peanut oil, corn oil, sunflower oil).
Palm kernel oil refinery process devides into degumming, deacidification, decolorization, deodorization, which removes impurities(fatty acid, pigments, ordor, etc) from crude palm kernel oil. With these processes, palm kernel oil reaches food standard and has a longer shelf life.
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Major difference 1: palm oil extraction way
Unrefined palm oil refers to extract palm oil out from palm fruit. The most widely used palm oil machine is palm oil press machine.
The refined palm oil processing process is complex compared with unrefined palm oil. Firstly, we need to use palm oil press machine or palm oil processing machine extracts palm oil out. After get crude palm oil, we need to use palm oil refining machine to refine crude palm oil. After palm oil refining process, we can get refined palm oil.
Major difference 2: the oil quality
Compared with unrefined palm oil, the refined palm oil flavor is more better, color and smell of palm oil is improved, the stability is improved which is good for long time storage.
But i need to tell you is that refining is not remove all the impurities in crude palm oil, but selectively remove impurities. For example, moisture not only affects the transparency of the oil but also promotes the rancidity of the oil; FFA affects flavor and promotes oil bad; and so on. Thus, cooking oil refining processing line is necessary for most kinds of cooking oil production process.

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