Method and device for physically deacidifying and deodorizing grease with high acid value and thermal instability

A thermally unstable, physical deacidification technology, applied in the direction of oil/fat refining, fat production, etc., can solve the problems of difficult to use continuous refining process, small scale and batch size, etc., to control the cost, energy consumption and production. Low cost and good effect

Pending Publication Date: 2017-06-16
XISHUANGBANNA HUAKUN BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And since oils with high acid value and thermal instability basically belong to small varieties of o

Method used

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  • Method and device for physically deacidifying and deodorizing grease with high acid value and thermal instability

Examples

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Effect test

Embodiment 1

[0039] The oil to be deacidified and deodorized is a batch of 2 tons of rubber tree seed oil with high acid value (acid value 25mgKOH / 100g) and heat instability (linolenic acid content 20%) that has been pretreated (degummed and decolorized). The following methods are used for deacidification and deodorization:

[0040] (1) The above-mentioned small batch, high acid value, thermally unstable oil to be deacidified and deodorized is deacidified by steam for 6 minutes at a temperature of 260°C and an absolute pressure of 100-250Pa;

[0041] (2) The grease obtained in step (1) is cooled to 200°C by heat exchange, and under an absolute pressure of 100-250Pa, deodorization treatment is carried out by passing water vapor for 30 minutes;

[0042] (3) Heat the oil obtained in step (2) to 260°C by heat exchange, carry out deacidification treatment according to step (1), and then carry out deodorization treatment according to step (2), repeat steps (1) and (2) Operate until the acid val...

Embodiment 2

[0049] The oil to be deacidified and deodorized is a batch of 2 tons of rubber tree seed oil with high acid value (acid value 45mgKOH / 100g) and heat instability (linolenic acid content 20%) that has been pretreated (degummed and decolorized).

[0050] The operation is the same as in Example 1, only the temperature of the deacidification tower is controlled at 240°C, and the temperature of the deodorization tank is controlled at 180°C.

[0051] In this operation, the oil circulates twice in the device on average, is heated for 12 minutes in the deacidification tower at 240°C, and has an average residence time of 60 minutes in the deodorization tank at 180°C (including the initial heating process). The oil after deacidification and deodorization is measured: the acid value is 0.7mgKOH / 100g, which meets the acid value requirements of first-grade oil in the enterprise standard (≤1mgKOH / 100g); the content of isomerized fatty acid is 0.22g / 100g, which meets the "GB 28050 Below the "...

Embodiment 3

[0053] The oil to be deacidified and deodorized is a batch of 2 tons of high acid value (acid value 18mgKOH / 100g) and thermally unstable (linolenic acid content 42%) sachaeji fruit oil that has been pretreated (degummed and decolorized).

[0054] The operation is the same as in Example 1, only the temperature of the deacidification tower is controlled at 240°C, and the temperature of the deodorization tank is controlled at 180°C.

[0055] In this operation, the oil circulates twice in the device on average, is heated for 12 minutes in the deacidification tower at 240°C, and has an average residence time of 60 minutes in the deodorization tank at 180°C (including the initial heating process). The oil after deacidification and deodorization is measured: the acid value is 0.8mgKOH / 100g, which meets the acid value requirements in the enterprise standard (≤3mgKOH / 100g); the content of isomerized fatty acid is 0.25g / 100g, which meets the requirements of "GB 28050 Food Safety National...

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Abstract

The invention discloses a method and device for physically deacidifying and deodorizing grease with high acid value and thermal instability. A deacidifying process of the grease is separated from a deodorizing process of the grease; deacidifying is realized by adopting higher temperature and shorter time; deodorizing is realized by adopting lower temperature and longer time; the deacidifying process and the deodorizing process are alternately carried out by adopting an nternal circulation mode until an acid value of the grease meets standards. A heater connected with a cold oil outlet of a heat exchanger is arranged on a feeding pipeline of a deacidifying tower of the device; a discharging pipeline of the deacidifying tower is connected with a hot oil inlet of the heat exchanger through a circulating valve; a heat dissipator connected with a hot oil outlet of the heat exchanger is arranged on a feeding pipeline of a deodorizing tank; a discharging pipeline of the deodorizing tank is connected with a cold oil inlet of the heat exchanger. According to the method and the device, disclosed by the invention, the content of isomerized fatty acid of the thermally-instable grease can be controlled to be less than or equal to 0.3g/100g or below. The method and the device have the advantages of good refining effect, low energy consumption and production cost and capability of realizing small-batch production; the method and the device are particularly suitable for physically refining small-variety grease with the high acid value and the thermal instability.

Description

technical field [0001] The invention relates to the technical field of edible oil processing, in particular to a method and device for physical refining of oil with high acid value and thermal instability. Background technique [0002] The content of unsaturated fatty acids in edible oils, especially the essential fatty acids linoleic acid (9,12-octadecadienoic acid) and linolenic acid (9,12,15-octadecatrienoic acid), It is an important indicator to measure the nutritional value of edible oil. Linoleic acid is an omega-6 series polyunsaturated fatty acid, which has the function of promoting cell growth and development in the human body; linolenic acid is an omega-3 series polyunsaturated fatty acid, which has the functions of lowering blood fat, preventing allergies, anti-tumor, promoting brain development and Protect cardiovascular and cerebrovascular effects. [0003] During the refining process of edible oil, it usually undergoes high-temperature processing to remove fr...

Claims

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Application Information

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IPC IPC(8): C11B3/00
CPCC11B3/001
Inventor 朱义鑫张娜娜王云祥苗永军尹升权陈婉王云
Owner XISHUANGBANNA HUAKUN BIOTECH CO LTD
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