Here are three common methods of palm kernel oil extraction, one is full press extraction where mechanical screw oil press machines are used to extract oil out by squeezing under high pressure, this oil extracting method is mainly used by small and big capacity oil mill plants. The other method is solvent extraction with hexane , where a solvent is mixed with the material to separate the oil, this extracting method, however, is generally used by larger capacity oil processing mills.the last one is Traditional method of palm kernel extraction.
1 .Mechanical extraction
Mechanical extraction processes are suitable for both small- and large- capacity operations.
2 .Solvent extraction
Solvent extraction processes can be divided into three main unit operations: kernel pre-treatment, oil extraction, and solvent recovery from the oil and meal. For the purposes of small-scale operations it is sufficient to mention the solvent extraction process is an alternative for high capacity mills. However the process is not recommended for small enterprises.
3 .Traditional method of palm kernel extraction
The traditional palm oil processing starts with the shelling of the palm nuts. The shelling used to be performed using two stones to crack each nut and separating the kernel and shell simultaneously. This manual operation has been largely superseded by the use of nut-cracking stations.
The mechanical nut-crackers deliver a mixture of kernels and shells that must be separated. The kernel/shell separation is usually performed in a clay-bath, which is a concentrated viscous mixture of clay and water. The density of the clay-bath is such that the shells sink while the lighter kernels float to the top of the mixture. The floating kernels are scooped in baskets, washed with clean water and dried. Periodically, the shells are scooped out of the bath and discarded.
The traditional oil extraction method is to fry palm kernels in old oil or simply heat the dried nuts. The fried kernels are then pounded or ground to a paste in a motorised grinder. The paste is mixed with a small quantity of water and heated to release the palm kernel oil. The released oil is periodically skimmed from the top.
Today, there are stations in villages that will accept well-dried kernels for direct extraction of the oil in mechanised, motorised expellers.
You should aware that the oil press you choose should depend on the capacity you desire, or you contact us for professional advice .Huatai Machinery manufactured according to customer demand high quality palm oil processing machine, allows the company has a high reputation overseas. As long as customers order our equipment we will provide the best customer service and oil equipment.