Meathod is the use of wax molecules at low temperature of hydrophilic, enrichment of wax molecules by dilute alkali liquor, and wax crystallization.Oil, acid less than 0.05% (FFA) in 15 ℃ or so into the crystallizer, refrigerant cold quickly to 1 ~ 7 ℃ and with low shear force and high cycle blender mixing, promote wax crystallization.Again according to the rice bran extract (http://www.ricebranoilplant.com) concentration of 20% ~ 40% to 1% ~ 3% of the low temperature lye, to keep temperature not to exceed 8 ℃, agitating continuously 15 ~ 20 minutes, drive centrifuge separation after demulsification.Its operation is the key, phosphoric acid and adding method at low temperature.
Method of coagulant dewaxing process:
By the method of coagulant dewaxing, frozen waxy oil is to 9 ~ 13 ℃, then stir, add theory alkaline neutralization of free fatty acids.Concentration of 15 ° alkali used Be 'left and right sides, stir in 60 ~ 70 RPM cases 1 ~ 1.2 hour, add 0.1% of the oil heavy aluminium sulfate (aqueous solution with the concentration of 13.6% ~ 13.6%), continue to stir 1 ~ 1.2 hours, terminal temperature shall not exceed 17 ℃, and then after the separation, XianDi and drying, for a quick dewaxing oil products.
The operation of the urea dewaxing process:
Urea dewaxing method is by adding urea solution containing wax molecules cocrystallization a dewaxing method.Will first waxy oil alkali refining by conventional method, and then cold from around 10 ℃, dispersant 3% of urea (with a saturated aqueous solution), stir crystallization 20 ~ 24 hours, the centrifugal separation, washing and drying for a quick dewaxing oil products.
Urea dewaxing method and conventional method namely pure kernel recycle station (http://www.palmmill.com/Products/prod/) equipment general, dewaxing rate is higher, the residual urea removal can be combined with subsequent working procedure, but the urea decomposition product ammonia caused environmental pollution, remains to be further perfect technology and equipment.
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