Raw rapeseed oil→ impurity removal→ stone removal→ magnetic separation→ fried seeds→ press→ filter→ crude oil.
Rapeseed oil cake→ animal feed/solvent extractionThe refining rapeseed oil process:
Machine-squeezed rapeseed oil contains 300-350 mg/kg of phosphorus, and reaches the fourth-grade rapeseed oil standard through dephospholipid and water impurities. Generally adopt low-temperature anhydrous degumming process and low-temperature hydration degumming process for refining.
1. Low temperature anhydrous degumming process
Crude oil→ clarification tank→ cooling tank→ plate and frame filter→ product
2. Low temperature hydration degumming process
Crude oil→ filtration→ cooling→ hydration tank→ settling tank→ products