CN113388450A - Grease decoloring method - Google Patents
Grease decoloring method Download PDFInfo
- Publication number
- CN113388450A CN113388450A CN202110670007.4A CN202110670007A CN113388450A CN 113388450 A CN113388450 A CN 113388450A CN 202110670007 A CN202110670007 A CN 202110670007A CN 113388450 A CN113388450 A CN 113388450A
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- China
- Prior art keywords
- decoloring
- grease
- activated carbon
- pot
- oil
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Classifications
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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
- C11B3/00—Refining fats or fatty oils
- C11B3/10—Refining fats or fatty oils by adsorption
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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
- C11B3/00—Refining fats or fatty oils
- C11B3/001—Refining fats or fatty oils by a combination of two or more of the means hereafter
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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
- C11B3/00—Refining fats or fatty oils
- C11B3/008—Refining fats or fatty oils by filtration, e.g. including ultra filtration, dialysis
Abstract
The invention discloses a grease decoloring method, which comprises the following steps: the method comprises the following steps: pretreatment before decolorization, and step two: weighing, and step three: vacuumizing, and step four: primary decoloring, and a fifth step: filtering, and a sixth step: and then decolorizing. The method provided by the invention is simpler to implement and has better grease decoloring effect, the crude oil after drying and heating is put into a decoloring pot, and then 3% of argil and 0.3% of activated carbon are added into the pot, the argil can effectively adsorb and remove pigments in the grease, meanwhile, colloid separated from the grease in the acid treatment process is also adsorbed by the argil, the argil has double functions of decoloring and degumming, the activated carbon can have the functions of decoloring and deodorizing, the primarily decolored grease can be obtained after repeated decoloring steps, the waste of the grease caused by the single use of the argil is avoided, the oil yield of the grease is increased, and the decoloring effect is stronger.
Description
Technical Field
The invention relates to the technical field of oil preparation, in particular to an oil decoloring method.
Background
The traditional oil refining process mainly comprises the following steps: degumming, alkali refining, decoloring and deodorizing. Among them, degumming and decoloring are two very important processes, and have the greatest influence on the quality of refined oil. There are generally two main classes of pigmentary substances in crude oil: one is called natural pigment. The other is called non-natural pigment, usually pigment formed by organic decomposition products, and has reddish brown color and reddish brown color. The crude oil is darker and turbid due to the existence of pigments, so that the crude oil must be clarified and transparent by adopting a decoloring process, which is one of the essential keys for obtaining high-quality finished oil.
The decoloring agent adopted by the crude oil decoloring technology is generally activated clay, the activated clay is added into the crude oil according to different proportions according to the types of oil materials, refining requirements, deep and light color of oil and the like at a specified temperature in the using process, the activated clay starts to adsorb pigment substances in the crude oil, and after a period of time, the crude oil and the activated clay adsorbing the pigment are separated by pressure filtration, so that the pigment substances, colloid substances, residual soap and the like in the crude oil are separated from the crude oil along with the activated clay. It should be noted that the dosage of activated clay needs to be strictly controlled in the production process, and if the dosage is too small, the decolorization effect is not obvious and can not reach the index; if the consumption of the clay is too much, although the pigment substances in the crude oil can be removed more thoroughly, a large amount of the activated clay also has a certain adsorption effect on the crude oil. Experiments show that the oil content of the decolored activated clay can reach 20-40%. In other related documents, it has been reported that if the amount of activated clay added is too high, the acid value and peroxide value of the decolorized crude oil are increased, and metal ions are generally immersed, so that the oxidation reaction of the crude oil is improved, the color reversion of the crude oil is accelerated, and even worse, the crude oil is dyed with too strong clay odor by using too much activated clay, which brings unnecessary troubles to the subsequent deodorization process of the crude oil.
Disclosure of Invention
In the process of reproducing the grease, the grease is usually decolorized to remove impurity colors in the grease, so that the grease is purer, and because the grease prepared by the conventional grease decolorizing method is not pure enough in color and cannot meet the use requirement, and most of the grease is decolorized by using carclazyte singly, the carclazyte flavor in the decolorized grease is increased, the grease decolorizing method is developed, the decolorizing effect of the grease is better, and the negative effects brought by the carclazyte can be neutralized by adding the active carbon.
The technical scheme of the invention is that the grease decoloring method comprises the following steps:
step one, pretreatment before decolorization: placing the degassed and dried oil into a heat exchanger, heating to a certain temperature, and placing into a decoloring pot;
step two, weighing: weighing a certain amount of argil and activated carbon by a metering device, and putting the argil and the activated carbon into a decoloring pot;
step three, vacuumizing: vacuumizing the working environment of the decoloring pot by using a vacuum pump;
step four, primary decoloring: stirring the grease in the decoloring pot by a stirrer at a certain rotating speed, and decoloring;
step five, filtering: conveying the mixed liquid of the grease and the clay activated carbon after the primary decolorization to a filter, and filtering by the filter to obtain clay activated carbon waste residues and primary decolorized grease;
step six, re-decoloring: and (3) putting the primarily decolorized grease into a heat exchanger for heating, repeating the steps from the first step to the fourth step, repeating the steps repeatedly in such a way, and filtering the grease subjected to re-decolorization for multiple times to obtain a decolorized grease finished product.
The method is further supplemented, and the heating temperature of the grease in the step one is 105-110 ℃.
The invention is further supplemented, the proportion of the clay added in the second step is 3 percent, and the proportion of the activated carbon is 0.3 percent.
In addition to the present invention, the vacuum degree required by the working environment of the decolorization pot in the third step is 740 mmHg.
The invention is further supplemented, the stirring speed of the stirrer in the fourth step is 60-70 r/min, and the decoloring time is 30-40 min.
And the oil content of the clay activated carbon waste residue in the fifth step is 15-17%.
The heating temperature of the primary decolorization grease in the sixth step is 100-110 ℃.
The method has the advantages that the implementation is simpler, the grease decoloring effect is better, the dried and heated crude oil is placed into a decoloring pot, then 3% of argil and 0.3% of activated carbon are added into the pot, the argil can effectively adsorb and remove pigments in the grease, meanwhile, colloid separated from the grease in the acid treatment process is also adsorbed by the argil, the argil has the double functions of decoloring and degumming, the activated carbon can have the functions of decoloring and deodorizing, the activated carbon is added to neutralize the influence caused by too little argil, the argil smell in the grease can be removed, the grease decoloring effect is not influenced, the primarily decolored grease can be obtained after the grease is subjected to repeated decoloring steps, the waste of the grease due to the single use of the argil is avoided, the grease yield is increased, and the decoloring effect is stronger.
Detailed Description
The existing grease cannot meet the requirements of people due to insufficient decolorization purity, and although the clay can play a role in decolorization, the clay has obvious negative effects, and if the dosage is too small, the decolorization effect is not obvious and cannot reach indexes; if the consumption of the white clay is too much, although pigment substances in the crude oil can be removed more thoroughly, a large amount of active white clay has a certain adsorption effect on the crude oil and causes the oil to contain white clay smell.
In order to make the technical solution more clear to those skilled in the art, the following is illustrated by specific examples:
example 1
A method for decoloring oil comprises the following steps:
step one, pretreatment before decolorization: placing the degassed and dried oil into a heat exchanger, heating to 105 ℃, and placing into a decoloring pot;
step two, weighing: weighing 3% of argil and 0.3% of activated carbon by a metering device, and putting the argil and the activated carbon into a decoloring pot;
step three, vacuumizing: vacuumizing the working environment of the decoloring pot by using a vacuum pump, wherein the vacuum degree is 740 mmHg;
step four, primary decoloring: stirring the grease in the decoloring pot by a stirrer at the rotating speed of 60r/min for 30 min;
step five, filtering: conveying the mixed liquid of the grease and the clay activated carbon after the primary decolorization to a filter, and filtering by the filter to obtain clay activated carbon waste residues and primary decolorized grease;
step six, re-decoloring: and (3) putting the primarily decolorized grease into a heat exchanger, heating to 100 ℃, then putting the primarily decolorized grease into a decolorization pot, repeating the steps from the first step to the fourth step, and repeating the steps in a circulating manner, so that the grease after re-decolorization is filtered for multiple times to obtain a decolorized grease finished product.
Example 2
A method for decoloring oil comprises the following steps:
step one, pretreatment before decolorization: placing the degassed and dried oil into a heat exchanger, heating to 110 ℃, and then placing into a decoloring pot;
step two, weighing: weighing 3% of argil and 0.3% of activated carbon by a metering device, and putting the argil and the activated carbon into a decoloring pot;
step three, vacuumizing: vacuumizing the working environment of the decoloring pot by using a vacuum pump, wherein the vacuum degree is 740 mmHg;
step four, primary decoloring: stirring the grease in the decoloring pot by a stirrer at a rotating speed of 65r/min, wherein the decoloring time is 35 min;
step five, filtering: conveying the mixed liquid of the grease and the clay activated carbon after the primary decolorization to a filter, and filtering by the filter to obtain clay activated carbon waste residues and primary decolorized grease;
step six, re-decoloring: and (3) putting the primarily decolorized grease into a heat exchanger, heating to 105 ℃, then putting the primarily decolorized grease into a decolorization pot, repeating the second step to the fourth step, repeating the steps in a circulating manner, and filtering the grease subjected to re-decolorization for multiple times to obtain a decolorized grease finished product.
Example 3
A method for decoloring oil comprises the following steps:
step one, pretreatment before decolorization: placing the degassed and dried oil into a heat exchanger, heating to 110 ℃, and then placing into a decoloring pot;
step two, weighing: weighing 3% of argil and 0.3% of activated carbon by a metering device, and putting the argil and the activated carbon into a decoloring pot;
step three, vacuumizing: vacuumizing the working environment of the decoloring pot by using a vacuum pump, wherein the vacuum degree is 740 mmHg;
step four, primary decoloring: stirring the grease in the decoloring pot by a stirrer at a rotating speed of 701r/min for 40 min;
step five, filtering: conveying the mixed liquid of the grease and the clay activated carbon after the primary decolorization to a filter, and filtering by the filter to obtain clay activated carbon waste residues and primary decolorized grease;
step six, re-decoloring: and (3) putting the primarily decolorized grease into a heat exchanger, heating to 110 ℃, then putting the primarily decolorized grease into a decolorization pot, repeating the steps from the first step to the fourth step, and repeating the steps in a circulating manner, so that the grease after re-decolorization is filtered for multiple times to obtain a decolorized grease finished product.
The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.
Claims (7)
1. A method for decoloring oil is characterized by comprising the following steps:
step one, pretreatment before decolorization: placing the degassed and dried oil into a heat exchanger, heating to a certain temperature, and placing into a decoloring pot;
step two, weighing: weighing a certain amount of argil and activated carbon by a metering device, and putting the argil and the activated carbon into a decoloring pot;
step three, vacuumizing: vacuumizing the working environment of the decoloring pot by using a vacuum pump;
step four, primary decoloring: stirring the grease in the decoloring pot by a stirrer at a certain rotating speed, and decoloring;
step five, filtering: conveying the mixed liquid of the grease and the clay activated carbon after the primary decolorization to a filter, and filtering by the filter to obtain clay activated carbon waste residues and primary decolorized grease;
step six, re-decoloring: and (3) heating the primarily decolorized grease in a heat exchanger, then putting the primarily decolorized grease in a decolorization pot, repeating the second step to the fourth step, repeating the steps repeatedly, and filtering the grease subjected to re-decolorization for multiple times to obtain a decolorized grease finished product.
2. The method as claimed in claim 1, wherein the heating temperature for the first step is 105-110 ℃.
3. The method for decoloring oil and fat according to claim 1, wherein the proportion of the clay added in the second step is 3% and the proportion of the activated carbon is 0.3%.
4. The method for decoloring oil and fat according to claim 1, wherein the vacuum degree required by the working environment of the decoloring pot in the third step is 740 mmHg.
5. The grease decoloring method according to claim 1, wherein the stirring speed of the stirrer in the fourth step is 60-70 r/min, and the decoloring time is 30-40 min.
6. The method for decoloring oil and fat according to claim 1, wherein the oil content of the clay activated carbon waste residue in the fifth step is 15 to 17 percent.
7. The method as claimed in claim 1, wherein the heating temperature for the preliminary decolorization of the oil in the sixth step is 100-110 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110670007.4A CN113388450A (en) | 2021-06-16 | 2021-06-16 | Grease decoloring method |
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| CN202110670007.4A CN113388450A (en) | 2021-06-16 | 2021-06-16 | Grease decoloring method |
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| CN113388450A true CN113388450A (en) | 2021-09-14 |
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| CN202110670007.4A Pending CN113388450A (en) | 2021-06-16 | 2021-06-16 | Grease decoloring method |
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| CN105176676A (en) * | 2015-07-17 | 2015-12-23 | 广州市正德生物科技有限公司 | Edible plant oil non-soap refining method |
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- 2021-06-16 CN CN202110670007.4A patent/CN113388450A/en active Pending
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