At present, soybean/sunflower/rice bran/corn germ/peanu/rapeseed/canola/cottonseed cooking oil production process have two kind of processing method: pressing and leaching(extraction). Pressing method is by physical pressure and get oil directly from the oil seeds. The whole process does not involve any chemical additives, to ensure product safety, health, pollution-free. The expeller method is divided into cold pressing and hot pressing. The difference of cold pressing and hot pressing is whether use high-temperature process or not. Hot pressing using a high temperature, can improve the oil yield, but destroy nutrients; cold-pressed not to use high temperature, the oil is low, but the complete nutritional ingredients.
1.1.3 The process and method of pressing for peanut/soybean/sunflower/sesame/rapeseed/rice bran/corn/walnut.
Peanut/sunflower/sesame/soybean/----Cleaning---First milling---filter----Press two times---Press third times---Crude oil after pressing and Cake after pressing.
1.1.4 Character of seeds press/mill/expeller machine
ZY-24 style | 202-3style | 200A-3style | |
Output capacity (t/d) | 50-55(seed) | 45-50 | 9-12 |
Residual oil % | 11-13(cakes) | 11-13 | 6-7 |
Motor(kw) | 30,7.5,22 | 30 | 18.5 |
Weight (kg) | 7500 | 6500 | 5000 |
Dimension(mm) | 3060*1970*4500 | 2950*1950*3270 | 2850*1850*3270 |
1.2 The leaching(extraction) method is to use solvent naphtha (6#) after fully immerse oil meal raw material to high temperature (260 degrees) and extract the oil from seeds meal, after a "technology of six" (degreasing, degumming, dewatering, decoloring, deodorization, deacidification). The biggest characteristic is high oil yield and low production cost, the price is lower than squeezing method.
The extraction(LEACHING) method is widespread used in the market. Because of high oil yield and low production cost, the extraction(leaching) machine is hot sale in the worldwide.
2. The difference of pressing and extraction(leaching):
Squeezing method due to the yield is low, so the raw material for squeezing must be seeds of high oil content, and itself is probably oil crops; Due only to squeeze at the same time, the residual oil in the cake is high, so the modern enterprise in order to save resources, the pursuit of efficiency of cases will be to squeeze the oil cake with leaching rule of oil again
The extraction method applies to vast oil seeds. Especially those high nutritional value but low oil yield seeds. Due to the advantage of leaching, this method is widely used in the cooking oil industrial. Approximately 90% of the oil in the world is using extraction method.
