CN110923058A - Method for controlling harmful substances in edible vegetable oil - Google Patents
Method for controlling harmful substances in edible vegetable oil Download PDFInfo
- Publication number
- CN110923058A CN110923058A CN201911341952.9A CN201911341952A CN110923058A CN 110923058 A CN110923058 A CN 110923058A CN 201911341952 A CN201911341952 A CN 201911341952A CN 110923058 A CN110923058 A CN 110923058A
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- Prior art keywords
- extraction
- separation
- mpa
- kettle
- pressure
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B1/00—Production of fats or fatty oils from raw materials
- C11B1/10—Production of fats or fatty oils from raw materials by extracting
- C11B1/104—Production of fats or fatty oils from raw materials by extracting using super critical gases or vapours
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B1/00—Production of fats or fatty oils from raw materials
- C11B1/10—Production of fats or fatty oils from raw materials by extracting
- C11B1/102—Production of fats or fatty oils from raw materials by extracting in counter-current; utilisation of an equipment wherein the material is conveyed by a screw
Abstract
The invention discloses a method for controlling harmful substances in edible vegetable oil, which comprises the following steps: smashing the woody oil to 20-40 meshes, and filling the smashed woody oil into an extraction kettle, wherein the process conditions are as follows: the extraction pressure is 15-50 MPa, the extraction time is 120-240 min, the extraction flow is 50-120 kg/h, the extraction temperature is 25-50 ℃, the separation pressure is 7-15 MPa, and the separation temperature is 25-50 ℃; collecting extracts in the separation kettle I and the separation kettle II respectively every 30 min; adding edible plant crude oil into a material tank, and setting technological parameters of countercurrent extraction: the extraction temperature is 20-60 ℃, the extraction pressure is 15-60 MPa, and the flow is as follows: 40-100 kg/h and material speed; the separation kettle I is 6-15 MPa, and the separation temperature is 20-45 ℃; pressure relief; in the pressure relief process, the pressure relief speed in the extraction kettle is 0.001-0.10 MPa/s. The invention has good effect for controlling harmful substances in edible vegetable oil.
Description
Technical Field
The invention relates to a method for controlling harmful substances in edible vegetable oil, belonging to the technical field of material extraction.
Background
The crude vegetable oil is generally refined to meet the edible requirements. Refining is a technological process for removing non-glyceride components in the crude oil by five-removal procedures of degumming, deacidification, decoloration, deodorization and the like. The deacidification is one of the important processes of oil and fat refining, and the main purpose of the deacidification is to remove free fatty acid in crude oil and remove part of impurities such as pigments, phospholipids, hydrocarbons, mucilaginous substances and the like and beneficial components such as tocopherol, sterol ester and the like. The deacidification method mainly comprises three methods, namely chemical deacidification, physical deacidification (or steam refining) and mixed oil deacidification. However, the traditional refining processes have the defects of complex process, easily damaged active ingredients, environmental pollution and the like: in order to overcome the defects of the traditional deacidification method, many grease chemists search and invent a plurality of new deacidification methods, including biological deacidification (or biological refining), chemical re-esterification deacidification, solvent extraction deacidification, liquid crystal deacidification and the like.
The prior common extraction methods of natural products comprise a solvent extraction method, an ultrasonic extraction method, a microwave extraction method, an enzyme extraction method and the like. Although the extraction method such as solvent extraction method has high extraction rate, it has inevitable defects of solvent residue, and in the case of heat-sensitive food, heating can cause qualitative change of some unsaturated fatty acids, such as DHA, ARA and other chemical substances. The natural extract is mainly used in the fields of food, cosmetics and the like. With the improvement of living standard, people have higher and higher requirements on the nutritional quality, sensory quality and freshness of products such as food, cosmetics and the like, and natural products obtained by solvent leaching hardly meet the requirements, so that low-temperature organic solvent-free extraction technology is gradually valued by people. At present, the low-temperature and solvent residue-free high-new extraction separation technology mainly comprises a supercritical extraction fluid technology, an aqueous enzymatic technology, a superfine grinding technology, a molecular distillation method and the like.
However, the prior art is still not ideal for controlling harmful substances in edible vegetable oil.
Disclosure of Invention
The invention aims to provide a method for controlling harmful substances in edible vegetable oil, so as to overcome the defects of the prior art.
The invention is realized by the following steps: a method for controlling harmful substances in edible vegetable oil comprises the following steps:
step 1: smashing the woody oil to 20-40 meshes, putting the smashed woody oil into an extraction kettle, and setting the supercritical CO2 extraction process conditions: the extraction pressure is 15-50 MPa, the extraction time is 120-240 min, the extraction flow is 50-120 kg/h, the extraction temperature is 25-50 ℃, the separation pressure is 7-15 MPa, and the separation temperature is 25-50 ℃;
step 2: collecting extracts in the separation kettle I and the separation kettle II respectively every 30 min;
and step 3: adding edible plant crude oil into a material tank, and setting technological parameters of countercurrent extraction: the extraction temperature is 20-60 ℃, the extraction pressure is 15-60 MPa, and the flow is as follows: 40-100 kg/h and material speed; the separation kettle I is 6-15 MPa, and the separation temperature is 20-45 ℃;
and 4, step 4: in the pressure relief process, the pressure relief process is carried out slowly, otherwise, the woody oil is subjected to supercritical CO2Penetrate the plugging net and run into the separation kettle, so that the pipeline is polluted. In the pressure relief process, the pressure relief speed in the extraction kettle is 0.001-0.10 MPa/s.
The invention adopts supercritical CO2Countercurrent extraction separation, which utilizes supercritical CO2Has special dissolving effect on some special natural products, and utilizes supercritical CO2In relation to its density, i.e. pressure and temperature versus supercritical CO2The influence of the dissolving power. In supercritical CO2Contacting with the substance to be separated to selectively extract the components with different polarity, boiling point and molecular weight. Supercritical CO2The extraction technology has the advantages of low treatment temperature, no solvent residue, no pollution, less nutrient loss and the like, so that the extraction technology can control harmful substances in the edible vegetable oil and can obtain unpredictable effects.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention:
example 1:
a method for controlling harmful substances in edible vegetable oil comprises the following steps:
step 1: crushing walnuts to 20-40 meshesPlacing into an extraction kettle, and setting supercritical CO2The extraction process conditions are as follows: the extraction pressure is 15-50 MPa, the extraction time is 120-240 min, the extraction flow is 50-120 kg/h, the extraction temperature is 25-50 ℃, the separation pressure is 7-15 MPa, and the separation temperature is 25-50 ℃;
step 2: collecting extracts in the separation kettle I and the separation kettle II respectively every 30 min;
and step 3: adding walnut crude oil into a material tank, and setting technological parameters of countercurrent extraction: the extraction temperature is 20-60 ℃, the extraction pressure is 15-60 MPa, and the flow is as follows: 40-100 kg/h and material speed; the separation kettle I is 6-15 MPa, and the separation temperature is 20-45 ℃;
and 4, step 4: in the pressure relief process, the pressure relief is carried out slowly, otherwise, the walnut powder can be accompanied by supercritical CO2Penetrate the plugging net and run into the separation kettle, so that the pipeline is polluted. In the pressure relief process, the pressure relief speed in the extraction kettle is 0.001-0.10 MPa/s.
Note that: in the step 1, the crushing granularity of the walnuts is 20 meshes; in the step 4, the pressure relief process is carried out slowly, otherwise, the walnut powder is subjected to supercritical CO2Penetrate the plugging net and run into the separation kettle, so that the pipeline is polluted. In the pressure relief process, the pressure relief speed in the extraction kettle is 0.001-0.10 MPa/s.
Example 2:
step 1: the method comprises the following steps of (1) putting rapeseeds into an extraction kettle to be 20-40 meshes, and setting the supercritical CO2 extraction process conditions: the extraction pressure is 15-50 MPa, the extraction time is 120-240 min, the extraction flow is 50-120 kg/h, the extraction temperature is 25-50 ℃, the separation pressure is 7-15 MPa, and the separation temperature is 25-50 ℃;
step 2: and collecting extracts in the separation kettle I and the separation kettle II respectively every 30 min.
And step 3: adding the crude rapeseed oil into a material tank, and setting technological parameters of countercurrent extraction: the extraction temperature is 20-60 ℃, the extraction pressure is 15-60 MPa, and the flow is as follows: 40-100 kg/h and material speed; the separation kettle I is 6-15 MPa, and the separation temperature is 20-45 ℃.
And 4, step 4: in the pressure relief process, the pressure relief process is carried out slowly, otherwise, the rape seed powder is subjected to supercritical CO2Through the net, runningTo the separation vessel, so that the piping is contaminated. In the pressure relief process, the pressure relief speed in the extraction kettle is 0.001-0.10 MPa/s.
The detection method comprises the following steps: sensory and nutritional ingredient index performance test experiments of the oil products obtained by extraction in example 1 and example 2 are respectively carried out.
1. Experimental materials: the oils obtained in examples 1 and 2.
2. The experimental method comprises the following steps: and detecting according to the corresponding national standard of the people's republic of China.
3. The experimental results are as follows:
the results of the experiment are shown in table 1.
TABLE 1 analysis of oil products from each part of countercurrent extraction
Experiments prove that the invention has good effect on controlling harmful substances in the edible vegetable oil.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (1)
1. A method for controlling harmful substances in edible vegetable oil, which is characterized by comprising the following steps:
step 1: crushing the woody oil to 20-40 meshes, putting the crushed woody oil into an extraction kettle, and setting supercritical CO2The extraction process conditions are as follows: the extraction pressure is 15-50 MPa, the extraction time is 120-240 min, the extraction flow is 50-120 kg/h, the extraction temperature is 25-50 ℃, the separation pressure is 7-15 MPa, and the separation temperature is 25-50 ℃;
step 2: collecting extracts in the separation kettle I and the separation kettle II respectively every 30 min;
and step 3: adding edible plant crude oil into a material tank, and setting technological parameters of countercurrent extraction: the extraction temperature is 20-60 ℃, the extraction pressure is 15-60 MPa, and the flow is as follows: 40-100 kg/h and material speed; the separation kettle I is 6-15 MPa, and the separation temperature is 20-45 ℃;
and 4, step 4: the pressure relief process is carried out slowly; in the pressure relief process, the pressure relief speed in the extraction kettle is 0.001-0.10 MPa/s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911341952.9A CN110923058A (en) | 2019-12-24 | 2019-12-24 | Method for controlling harmful substances in edible vegetable oil |
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| CN201911341952.9A CN110923058A (en) | 2019-12-24 | 2019-12-24 | Method for controlling harmful substances in edible vegetable oil |
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| CN110923058A true CN110923058A (en) | 2020-03-27 |
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| CN201911341952.9A Pending CN110923058A (en) | 2019-12-24 | 2019-12-24 | Method for controlling harmful substances in edible vegetable oil |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1376770A (en) * | 2002-04-08 | 2002-10-30 | 中国科学院山西煤炭化学研究所 | Continuous feeding process for extracting garlic oil by supercritical CO2 |
| CN103305338A (en) * | 2012-06-01 | 2013-09-18 | 雷华平 | Deacidification and deodorization method for tea oil |
| CN103756783A (en) * | 2014-01-09 | 2014-04-30 | 江南大学 | Method for ultrasonic countercurrent extraction of tea seed and/or camellia seed soil |
| CN103834468A (en) * | 2013-12-23 | 2014-06-04 | 吉水县金诚粮油有限公司 | Reversed multiple leaching method for extracting rice bran crude oil |
| CN104479861A (en) * | 2014-12-15 | 2015-04-01 | 端木凡林 | Method for extracting liposoluble substances |
-
2019
- 2019-12-24 CN CN201911341952.9A patent/CN110923058A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1376770A (en) * | 2002-04-08 | 2002-10-30 | 中国科学院山西煤炭化学研究所 | Continuous feeding process for extracting garlic oil by supercritical CO2 |
| CN103305338A (en) * | 2012-06-01 | 2013-09-18 | 雷华平 | Deacidification and deodorization method for tea oil |
| CN103834468A (en) * | 2013-12-23 | 2014-06-04 | 吉水县金诚粮油有限公司 | Reversed multiple leaching method for extracting rice bran crude oil |
| CN103756783A (en) * | 2014-01-09 | 2014-04-30 | 江南大学 | Method for ultrasonic countercurrent extraction of tea seed and/or camellia seed soil |
| CN104479861A (en) * | 2014-12-15 | 2015-04-01 | 端木凡林 | Method for extracting liposoluble substances |
Non-Patent Citations (1)
| Title |
|---|
| 李加兴等: "猕猴桃籽油保健功能研究", 《食品科学》 * |
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