Refined vegetable oil and production method thereof

[0021] Example: A refining vegetable oil and a method thereof, including filtration, degumming (hydration), deacidification (alkalization), hydrogenation, decolorization, and deodorization of crude oil;

[0022] The specific production steps are as follows:

[0023] (1) Filter

[0024] Put the crude vegetable oil into the plate and frame filter to filter out some of the magazines, and then put it in the WL centrifuge for centrifugation and filtration for use.

[0025] (2) Degumming

[0026] After the process (1), the crude vegetable oil is heated to 70-75°C, and 50% citric acid is added according to the content of the non-hydratable phospholipid of the raw oil. The reaction is carried out in the acidification tank for 25-40 minutes, and 3-4 Baume is added. The lye is flocculated, while adding hot soft water of 3.0-3.5% oil weight, reacting in the hydration tank for 46-60 minutes, heating to 85°C, centrifugally separating the oil feet and primary degumming oil, and drying the primary degumming oil to remove moisture and residual solvent; The primary degummed vegetable oil is heated to 75°C through a heat exchanger, and 75% phosphoric acid with a concentration of 0.02-0.04% by weight is added, and the degumming reaction is carried out for 15-30 minutes to obtain the secondary degummed oil.

[0027] (3) Deacidification

[0028] Put the degummed oil in (2) into a cylindrical iron pot, then add 0.02%~0.5% phosphoric acid in the cylindrical iron pot, and treat it at 60~90℃ for 15-30 minutes, then add 1%~3 of oil Sodium hydroxide (caustic soda) with a concentration of 8% to 12% is saponified for 10 to 30 minutes. Because the saponified material sinks to the bottom of the pot due to its high proportion, it is called soapstock after being released; then it is washed with water or dilute acid at 65℃ 2 times, put the water solution, and then heated at 114 ℃ to remove the water, after drying to obtain a neutralized oil.

[0029] (4) Hydrogenation

[0030] Put the neutralized oil in (3) into the serpentine hydrogenation pot, keep the temperature in the pot at 200°C and the pressure at 41.37 kPa, add 0.01% to 0.2% nickel formate or nickel carbonate to the fat to fully react 4-6 Hydrogenated fat is obtained in about hours.

[0031] (5) Decolorization

[0032] Put the hydrogenated grease in (4) into the reactor, ensure that the temperature in the reactor is 225°C, 0.065-0.13KPa, and add active alumina or sulfurous acid with an amount of grease of 4%-6% After reacting for 30 minutes after the decolorizing agent, take out the decolorized fat and oil to cool, and filter to separate the decolorizing agent after cooling to 70°C.

[0033] (6) Deodorization

[0034] Put the decolorized grease in (5) into a vacuum tank with a temperature of 270°C and an air pressure of 5.07KPa, and put an appropriate amount of activated carbon for distillation. After the grease in the vacuum tank is cooled, add 0.005% to 0.01% of the lemon. Refined vegetable oil can be obtained after acid.

[0035] To sum up: the refined vegetable oil of the present invention removes impurities and pigments in the oil while ensuring the quality of the oil. The original fragrance and nutrient elements of the oil are not destroyed. It complies with the national first-level vegetable oil refining standard, and the oil quality is good.