Method for decolorizing small mechanical-reaped tuber mustard seedcake leaching oil by using phosphoric acid
A mustard seed and oil extraction technology, which is applied in the direction of oil/fat refining and fat production, can solve the problems of low oil refining rate and high decolorization cost, and achieve the effect of simple equipment, reducing production cost and improving refining rate
Active Publication Date: 2013-03-27
YUNNAN ZHENWEI GREASE
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Problems solved by technology
The cost of decolorization is high, and the refining rate of oil is low
Method used
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[0012] Examples are given below:
[0013] Use a 1000kg small-machine mustard seed cake to extract oil decolorization test to compare the effects of two decolorization methods:
[0014] 1. White clay decolorization (hair oil color: yellow 35, red 8, decolorized oil color: yellow 35, red 5);
[0015] 1. The value of clay consumption: 1000kg×3%=30kg (clay clay), 30kg×2.00 yuan / kg=60.00 yuan;
[0016] 2. Filter residual oil (loss) in clay: 30kg×35% (residual oil rate)=10.5kg (oil), 10.5kg×11.00 yuan / kg=116.00 yuan;
[0017] 3. Decolorization cost: 60 yuan + 116 yuan = 176 yuan;
[0018] 4. Decolorization and refining rate: ((1000-30) / 1000) × 100%=97%;
[0019] 2. Phosphoric acid decolorization (hair oil color: yellow 35, red 8; decolorized oil color: yellow 35, red 5) adopt the 6 steps given in the technical plan to decolorize to get the following results.
[0020] 1. Consumption of phosphoric acid value: 1000kg×0.3%=3kg (phosphoric acid), 3kg×5.60kg=16.8 yuan;
[0021] 2. De...
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The invention discloses a method for decolorizing small mechanical-reaped tuber mustard seedcake leaching oil by using phosphoric acid, comprising the following steps of: filtering to remove blank powder in leached crude oil; spraying a sodium hydroxide solution with the concentration at 60 DEG C in the filtered crude oil, stirring at the speed of 60r / min, heating to 65 DEG C, stirring at the speed of 30r / min, adding soft water with the temperature of 70 DEG C, stirring for 20minutes, standing and settling for 5-6hours to obtain unglued and deacidified oil, wherein the soft water is 8% of the weight of the oil; heating to 65 DEG C, adding 0.5% light salt brine with the temperature of 70 DEG C and stirring for 15minutes, wherein the weight of light salt brine is 5% of the weight of the oil; adding 85% phosphoric acid, stirring at the speed of 60r / min; and when the temperature is raised to 65 DEG C, splashing phosphoric acid on the surface of the oil, stirring at the speed of 60r / min for 30minutes so that phosphoric acid sufficiently contacts with the oil to be oxidized and decolorized, wherein the weight of phosphoric acid is 0.3% of the weight of the oil; heating the decolorized oil to 80 DEG C, adding hot water with the temperature of 85 DEG C, stirring at the speed of 30r / min for 15minutes, standing for 2hours, and discharging waste water, wherein the weight of hot water is 5% of the weight of the oil; and introducing vapor with the pressure of 0.2Mpa in a deodorization pot, and deodorizing when the vapor introduction time is longer than or equal to 6hours. The method has the effects that the refining ratio is increased and the cost is reduced.
Description
technical field [0001] The invention relates to a method for decolorizing oil extracted from mustard seed cake with phosphoric acid. Background technique [0002] The crude rapeseed oil leached by small machine mustard rapeseed cake has deep color, and the red value is generally between 8-9; the leached rapeseed crude oil produced by pre-pressing and leaching process is light in color, and the red value generally ranges between 4.5-5.5. The rapeseed oil with deep color value needs to be decolorized. The conventional decolorization method is the adsorption decolorization method, which uses the selective adsorption of activated clay to absorb the pigment in the oil, so as to achieve the purpose of decolorization. The decolorization effect is good, but the clay takes away There is also a lot of oil, and the loss is large. The cost of decolorization of oil extracted from mustard seed cake per ton is 176 yuan, and the decolorization and refining rate is 97%. The cost of decolori...
Claims
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IPC IPC(8): C11B3/00C11B3/04
Inventor 王建全黄金成王培良
Owner YUNNAN ZHENWEI GREASE