How do you quickly dispose of the black sediment in freshly beaten rapeseed oil in a matter of days?

There is a black precipitate in the freshly beaten rapeseed oil, and we can use the following methods to remove it:

1) Rapeseed oil degumming: remove phospholipids, mucus, resins, proteins, sugars, trace metals, etc. in **, generally using hydration and acid refining methods.

2) Rapeseed oil deacidification: the free fatty acids, acidic pigments, sulfides, insoluble impurities and trace metals in the oil are removed by food-grade lye neutralization method.

3) Rapeseed oil washing: wash away the soaphorn and water-soluble impurities remaining in the oil during the deacidification process.

4) Rapeseed oil dehydration: Heating and vacuum drying are used to remove the water in the refined oil.

5) Rapeseed oil decolorization: the use of clay, aluminum silicate, activated carbon and other adsorbents to remove various pigments, colloids, oxides, etc. in the oil.

6) Rapeseed oil deodorization: using the principle of vacuum air extraction, it removes low-molecular odor substances, free fatty acids, monoglycerides, glycolipids, sulfides, and thermal decomposition products of pigments in oil.

7) Rapeseed oil dewaxing or degreasing: mainly freezing, crystallization or winterization crystallization, fractionation to remove wax lipids in the oil.

Rapeseed oil is commonly known as rapeseed oil, also known as rapeseed oil, coriander oil, brassica oil, sesame oil, canola oil, is a kind of edible oil squeezed from rapeseed. It is one of the main edible oils in China, mainly produced in the Yangtze River basin and the southwest and northwest, and its output ranks first in the world.

The absorption rate of rapeseed oil by the human body is very high, up to 99%. Therefore, the linoleic acid contained in it contains nutrients such as unsaturated fatty acids and vitamin E, which can be well absorbed by the body. Hope mine is helpful to you!

Filtration or static precipitation.

Let it settle still and naturally precipitate, don't move it, so that it can settle faster.

It can also be treated by hydration precipitation method and filtration method. It can be treated by hydration precipitation method and filtration method.

The purpose of oil refining Oil refining usually refers to the refining of crude oil.

The existence of impurities in crude oil not only affects the edible value and safe storage of oil, but also brings difficulties to deep processing, but the purpose of refining is not to remove all the impurities in the oil, but to remove the impurities that are harmful to food, storage, industrial production, etc., such as gossypol, protein, phospholipids, mucus, water, etc., and are beneficial"Impurities", such as tocopherols, etc., should be retained. Therefore, according to different requirements and uses, the unwanted and harmful impurities are removed from the oil and oil to obtain a refined oil that meets a certain quality standard, which is the purpose of oil refining.

Sometimes one method is adopted and another refining effect is produced at the same time. For example, alkali refining (neutralization of free fatty acids) is a typical chemical method, however, the soap produced by the neutralization reaction can adsorb some pigments, mucus and proteins, etc., and separate them from the oil together. It can be seen that alkali refining is accompanied by physicochemical processes.

Usually, when we press rapeseed oil, we only need to let him excite his limbs and put them still, so that the oil will be brighter. Hope mine is helpful to you!

Hello, to remove the melanin of rapeseed oil, it is necessary to do refining of the hood, the color of rapeseed oil is dark, it means that the degree of refining of rapeseed oil is not high, you need to refine your own rapeseed oil, if it is not filtered by strict specifications, it will contain impurities, these magazines are stuffy and contain water, so, when stir-frying, due to the increase in oil temperature, impurities will be carbonized, resulting in a very black color, producing a lot of bubbles, but also because of the phenomenon of evaporation of gas in impurities. The best way to deal with these problems is to choose the method of phosphorus bitter soil filtration, which will be particularly clear and clean after vertical filtration. 

1. Before the rapeseed oil is sent into the crude oil pump and enters the refining tank, it is necessary to check whether the pipeline valve is normal, and the oil inlet valve should be closed immediately after the oil supply of each tank is completed. For crude rapeseed oil to be refined in the oil tank, the foam on the oil surface must be removed first, the oil surface should be smoothed, and the oil should be allowed to stand for an appropriate time so that there is no foam in the oil. Adjust the temperature to 25 to 35.

2. Preparation of lye: weigh out the specified amount of lye (the purity must be identified first), mix it with an appropriate amount of water, stir it, start the alkali pump, and circulate the lye to completely dissolve it. Reduce the lye temperature to 25-30, measure the lye wave temperature with a Baumé meter, and adjust it to 10 to 12.

3. Mixing alkali: When the oil surface is smooth and the temperature is stable at 25 to 35, start the stirrer to start stirring, first slow stirring for 1min, then change to fast turning, stirring at the same time, open the valve of the alkali tank, and put in the lye. The time of adding lye is generally about 15min, and after putting the lye, continue to stir quickly until the oil and soap particles are clearly separated, and the stirring time is about 3.

When the oil is clearly separated from the soap foot, change to slow stirring, open the heating steam door, stop stirring immediately when the temperature of the oil is raised to 60, and close the steam valve to make it cool and precipitate by itself. After checking that the pipeline of the oil conveying valve is normal, the oil is pumped into the water washing tank, and when the pump is pumped to the interface between the oil and the precipitated soap foot, great care must be taken not to pump the soap foot out, and at the same time the oil must be pumped out.