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Rapeseed primary oil refining

August 02, 2021

1. Process flow:

Pre-pressing crude oil → filtering and removing impurities → alkali refining and deacidification → dehydration and desolvation → rapeseed first-grade oil


                                                                                                                                                                                                                         leaching crude oil


Rapeseed oil


2. Main process parameters: 

(1) Filtration and impurity removal: remove a small amount of impurities in the pre-squeezed crude oil.

(2) Alkali refining and deacidification: the initial temperature of the alkali refining is about 40℃, add the lye with the concentration of 16°Be′ (where the excess alkali is 0—0.1%), stir for 30 minutes after the alkali is added, and when the soap particles are condensed The temperature is raised to 65°C during analysis, and it is allowed to stand for 6-8 hours to separate the soapstock.

(3) Dehydration and desolventization: Separate the clear oil and raise the temperature to 65°C, wash with 75-80°C hot water for 1-2 times, and the washing water consumption is 10-15% of the oil weight. After standing to separate the wastewater, vacuum dehydration or desolvation is performed to obtain the rapeseed first-grade oil.


Canola flower


3. The standard used in the product:

GB11762 rapeseed, GB1536 rapeseed primary and secondary oil, ZBX14011 advanced rapeseed cooking oil.

4. Grease processing machinery:

Storage tanks, filters, lye tanks, desoapizers, proportioning machines, dryers, heat exchangers, centrifuges, mixers, dehydrators, desolventizers.


The above wonderful content is the sharing of Rapeseed primary oil refining by Henan Zhongxing Grain and Oil Machinery Co., Ltd. If you want to know more rapeseed oil refining technology, you can contact us at any time.