Physical refining, chemical refining, which has higher input and output, which is more recommended?
The main difference between chemical refining and physical refining is the deacidification of the entire refining process.
Chemical refining is the use of NaOH to neutralize the acidic substances in the process of a neutralization and produce byproduct soap feet;
Physical refining is the way of using high temperature distillation according to the boiling point of the rancidity oil evaporation processing methods, distillation by-product fatty acids .
In the same feedstock condition, the chemical deacidification loss is 0.5-1 times higher than that of the physical refining, the chemical deacidification loss is proportional to the acid value (1.5-2: 1), the physical deacidification loss and the acid value are proportional (1 : 1)
Physical refining process options:
1, suitable for high acid value fats (acid value above 10%) (cottonseed oil, rice bran oil, palm oil, etc.), physical refining process to reduce the acid value of the oil distillation, while distilled into high-grade fatty acids, fatty acids used in large quantities in the chemical industry, there is a great market demand, oil refining plant is a good by-product!
2, high-grade nutritional oil (tea seeds, walnuts, safflower seeds, flaxseed, peony seeds, wheat germ and other sketches of high-end oil), many high-end oil companies to promote slogans on the one hand, on the other hand, to meet the government Rigid Standard, will choose not to add any chemical raw materials in oil refining deep processing technology.
Chemical refining process options:
1, low oil acid value (acid value less than 10%) and contains refractory substances recommended chemical refining (for example, peanut oil containing aflatoxin on the use of chemical refining, acid-base neutralization process can be synchronized decomposition part .
2, Low production (1-30 tons per day) Chemical refining is recommended because, under the same raw oil standard condition, although the physical refining he finished product yield is higher than the chemical refining , the production cost of consumption is greater than Chemical refining, the terminal production costs of both the same, but the physical refining chemical refining investment is much higher than the requirements of operating technicians higher standards! (Conventional bulk crush vegetable oil such as: peanut oil, soybean oil, rapeseed oil, corn oil, sunflower oil can recommend the use of chemical refining)