Henan Huatai Cereal and Oil Machinery Co

The oil content of rice bran oil is

, in which the unsaturated fatty acid content of rice bran oil is

, oleic acid

linoleic acid

, and is rich in oryzanol. Oryzanol can reduce platelet aggregation, reduce liver cholesterol synthesis and reduce cholesterol absorption. Due to its own characteristics, the rice bran oil refining process is different from other materials. Henan Huatai Grain and Oil Machinery Co., Ltd. has achieved great results in making oil from rice bran, and it is its company's patented product. The acid value of crude rice bran oil is generally relatively high, generally between
and

The acid value of some aged rice bran oil is as high as
and above, and the wax content is

, the color is darker and more difficult to decolorize. For the traditional alkali refining process, alkali refining losses are relatively large, resulting in relatively high refining costs. In order to produce international first-class refined rice bran oil with relatively good quality, Henan Huatai Grain and Oil Machinery Company has developed a new process, the physical refining process.
The process mainly consists of the following contents

The key to physical refining of hydrated degummed rice bran oil is to remove colloidal impurities in the oil as much as possible. The presence of a large amount of colloidal impurities will not only affect product quality, but will also easily coke under high temperatures and form grease that adheres to the surface of the filler, affecting the normal operation of the equipment.

For water washing, first heat the degummed oil to
degrees Celsius, add an alum solution with a temperature of
degrees Celsius and an amount of oil
and a content of
and stir slowly
minutes, let it sit for
hours and then release the oil.

The dry degumming drying oil is heated to about
degrees Celsius, and phosphoric acid with a content of
is added from a quantitative pump to an amount of oil quality
, which passes through the knife mixer. After rapid stirring and mixing reaction, it enters the leaf filter. Use the decolored waste clay to filter to remove residual phospholipids, metal ions and other impurities to obtain dry degumming oil.

Decolorization: Heat the
dry degumming oil to
, and then enter the decolorization tower. The vacuum degree of the decolorization tower is
and the decolorization time is
. The amount of clay added is appropriate to the quality of the oil.

The deacidified and decolorized oil passes through the oil
oil heat exchanger, and finally is heated by the heater and enters the deacidification tower for deacidification. The deacidification tower is a structural packed tower. The oil flows downward from the top under the action of gravity on the packing surface, and fully contacts with the saturated steam injected from the bottom to achieve the purpose of stripping and deacidification.

The deodorization and deodorization tower is a structural packing tower. The oil flows downward from the top under the action of gravity on the packing surface, and fully contacts with the saturated steam injected from the bottom to achieve the purpose of stripping and deodorization. The direct steam consumption is about
of the oil mass, and the absolute vacuum pressure is less than or equal to
.

Dewaxing
Since rice bran oil refining contains a certain amount of wax, which affects the quality of the oil, dewaxing is necessary. The deodorized oil exchanges heat with the frozen liquid through a plate heat exchanger. After the oil temperature drops to
, it is pumped into a stainless steel crystallization tank and is continuously stirred for crystallization.