Oil refining method

A refining method and oil technology, applied in the direction of oil/fat refining, fat production, etc., can solve the problems that the freezing experiment index cannot be known, and achieve good results

Active Publication Date: 2014-04-23
陈汉卿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the national standard (GB19112-2003), only the first-grade rice bran oil stipulates that "it should remain clear and transparent after storage at 0°C for 5.5 ho...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this embodiment, taking the processing of crude corn oil as an example, the oil refining method includes the following steps:

[0024] The first step, degumming:

[0025] The present invention adopts the method of enzymatic degumming to degumming the grease. Commercial enzymes are available, and the enzymes used can be purchased conveniently. Common ones include Lecitase Ultra, phospholipase A1, phospholipase A2, and phospholipase C.

[0026] Specifically, the crude corn oil after the separation of solid-phase mechanical impurities is heated to 35-65°C, the pH value of the crude corn oil is adjusted to 4.5-6.5, and then an enzyme for degumming is added to react for 0.5-6 hours, and then the temperature is rapidly raised to 90-100°C. ℃, the oil after deactivating the enzyme is rapidly cooled to 80-87 ℃, then add water at a temperature of 90-97 ℃ with 1% to 8% of the oil weight, mix well for 5-20 minutes, and then centrifuge to remove the water phase, and the degummed ...

Embodiment 2

[0052] In this embodiment, taking the treatment of crude rice bran oil as an example, the oil refining method includes the following steps:

[0053] The first step, filter:

[0054] In this embodiment, the solid-phase mechanical impurities are first separated by a decanter centrifuge, and the solid-phase impurities can be removed to 0.005%. The oil is filtered and then dewaxed. The benefit of dewaxing after filtration is that in addition to removing the wax in the oil, it also has the following auxiliary functions:

[0055] (1) Auxiliary degumming effect, so that the glue in the degumming oil is further reduced;

[0056] (2) demetallization, detection shows that after dewaxing, the iron ion, ferrous ion and other metal ions contained in the rice bran oil are significantly reduced;

[0057] (3) Auxiliary decolorization, for example, the color of rice bran oil will become lighter after dewaxing. All of these are beneficial to subsequent refining processes such as decolorizati...

Embodiment 3

[0076] In this embodiment, taking the processing of crude soybean oil as an example, the oil refining method includes the following steps:

[0077] The first step, filter:

[0078] Heat the crude soybean oil to 50°C, pump it into a decanter centrifuge with a centrifugal pump, and separate solid-phase mechanical impurities.

[0079] The second step, degumming:

[0080] Heat the filtered soybean oil to 65°C, adjust the pH value of the crude oil to 6.5, then add phospholipase C, react for 6 hours, then rapidly raise the temperature to 100°C, quickly cool down the oil after deactivating the enzyme to 87°C, and then add oil weight 8% of water at a temperature of 97°C was mixed thoroughly for 20 minutes and then centrifuged to remove the water phase. The degummed oil was dehydrated and dried under a vacuum condition of 300 Pa to obtain degummed oil.

[0081] The third step, the first refining process:

[0082] The degummed oil is heated up to 170°C, then enters the short-path dis...

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Abstract

The invention discloses an oil refining method. The oil refining method comprises a degumming process, a first refining process, a secondary refining process and a deacidification and deodorization process. The degumming effect of an enzymic degumming method is better, and the phosphorus content after the enzymic degumming can be reduced to an ideal index less than 5ppm; the oil refining can be completed under the conditions of high vacuum degree (0.1 to 10Pa) and short-time heat treatment (less than or equal to 3 seconds), and the oxidization and partial hydrolysis of the oil and generation of harmful substances (such as trans-acid, polymerized glyceride and the like) can be avoided; the core sections (refining and deacidification and deodorization) of the method belong to physical methods, no chemical additive is added in the operation process of the two sections, no waste water pollution is produced, and reference can be provided for improving an existing vegetable oil refining process.

Description

technical field [0001] The invention relates to a method for refining oil and belongs to the technical field of oil refining. Background technique [0002] The presence of impurities in crude oil not only affects the edible value and safe storage of oil, but also brings difficulties to deep processing. Oil refining usually refers to the refining of crude oil to remove harmful and unhelpful impurities such as protein, phospholipids, mucus, and water, which are harmful to food, storage, and industrial production. Therefore, according to different requirements and uses, the purpose of oil refining is to remove unnecessary and harmful impurities from oil to obtain finished oil that meets certain quality standards. [0003] At present, the oil refining process generally adopts traditional chemical refining or physical refining methods (the difference between the two methods is the removal method of free fatty acids, the method of removing free fatty acids by alkali refining and ...

Claims

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Application Information

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IPC IPC(8): C11B3/00
Inventor 陈汉卿
Owner 陈汉卿
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