CN113736561B - Method for reducing oil content in byproduct soapstock in refining process based on cavitation technology - Google Patents
Method for reducing oil content in byproduct soapstock in refining process based on cavitation technology Download PDFInfo
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- CN113736561B CN113736561B CN202111183729.3A CN202111183729A CN113736561B CN 113736561 B CN113736561 B CN 113736561B CN 202111183729 A CN202111183729 A CN 202111183729A CN 113736561 B CN113736561 B CN 113736561B
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000007670 refining Methods 0.000 title claims abstract description 20
- 239000006227 byproduct Substances 0.000 title claims abstract description 17
- 238000005516 engineering process Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 239000000047 product Substances 0.000 claims abstract description 31
- 239000002253 acid Substances 0.000 claims abstract description 20
- 239000012295 chemical reaction liquid Substances 0.000 claims abstract description 20
- 239000003513 alkali Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 230000035484 reaction time Effects 0.000 claims abstract description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 22
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 21
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical group [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 12
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 11
- 239000002585 base Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 13
- 239000003921 oil Substances 0.000 description 45
- 230000000052 comparative effect Effects 0.000 description 9
- 239000012535 impurity Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000008157 edible vegetable oil Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 150000003904 phospholipids Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- -1 sodium fatty acid Chemical class 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- C11B3/02—Refining fats or fatty oils by chemical reaction
-
- 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
- C11B3/02—Refining fats or fatty oils by chemical reaction
- C11B3/04—Refining fats or fatty oils by chemical reaction with acids
-
- 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
- C11B3/02—Refining fats or fatty oils by chemical reaction
- C11B3/06—Refining fats or fatty oils by chemical reaction with bases
-
- 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
- C11B3/16—Refining fats or fatty oils by mechanical means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/74—Recovery of fats, fatty oils, fatty acids or other fatty substances, e.g. lanolin or waxes
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Microbiology (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Fats And Perfumes (AREA)
Abstract
The invention discloses a method for reducing the oil content in byproduct soapstock in a refining process based on cavitation technology, which comprises the following steps: heating oil to 68-88 ℃, and adding acid into the oil for reaction to obtain a reaction liquid 1; adding alkali liquor into the reaction liquid 1, and then statically mixing to obtain a reaction liquid 2; the reaction liquid 2 is pressurized to 55-75bar for the first cavitation treatment; reducing the pressure to 8-20bar after the first cavitation treatment, and carrying out the second cavitation treatment to obtain a product liquid 1; adding water with the temperature of 85-95 ℃ into the product liquid 1, wherein the addition amount of the water is 0.2-0.5 wt% of the product liquid 1, and the reaction time is 5-20 minutes, so as to obtain product liquid 2; centrifugally separating the product liquid 2 to obtain nigre, wherein the centrifugal speed is 4500-6500rpm; the use amount of acid and alkali is reduced, the oil yield is improved, and the oil content in nigre is reduced.
Description
Technical Field
The invention belongs to the technical field of oil refining, and particularly relates to a method for reducing the oil content in byproduct soapstock in a refining process based on a cavitation technology.
Background
In the process of chemical refining of edible oil, after acid (phosphoric acid or citric acid) and alkali (NaOH or KOH) are added in a neutralization section, centrifugal high-shear or high-mixing mixers are generally used, the mixing strength and efficiency are relatively low, excessive acid or excessive alkali is required to be added in actual production in order to achieve the effects of mixing and reaction, and meanwhile, due to the uniform mixing problem, deviation sometimes occurs in the targeting of the reaction, so that the production cost is increased and the yield is lost.
Disclosure of Invention
Aiming at the problems that the existing edible oil chemical refining method needs excessive use of acid and alkali and is limited in uniform mixing, so that the production cost is increased and the yield is lost, the invention provides a method for reducing the oil content in the byproduct nigre in the refining process based on a cavitation technology.
A method for reducing the oil content in byproduct soapstock of a refining process based on cavitation technology, comprising the following steps:
heating the oil to 68-88 ℃, and adding acid into the oil to react for 60-90 minutes to obtain a reaction liquid 1;
adding alkali liquor into the reaction liquid 1, and then statically mixing for 5-15 minutes to obtain a reaction liquid 2;
the reaction liquid 2 is pressurized to 55-75bar for the first cavitation treatment;
reducing the pressure to 8-20bar after the first cavitation treatment, and carrying out the second cavitation treatment to obtain a product liquid 1;
adding water with the temperature of 85-95 ℃ into the product liquid 1, wherein the addition amount of the water is 0.2-0.5 wt% of the product liquid 1, and the reaction time is 5-20 minutes, so as to obtain product liquid 2;
and (3) centrifuging the product liquid 2 to obtain nigre, wherein the centrifugal speed is 4500-6500rpm.
Further defined, the acid is phosphoric acid or citric acid.
Further defined, the base is potassium hydroxide or sodium hydroxide.
Further defined, the pressure of the first cavitation treatment is 63-68bar.
Further defined, the pressure of the second cavitation treatment is 11-14bar.
Further defined, the temperature of the oil after heating is 75-85 ℃.
Further defined, the acid is provided by its corresponding acid solution, the acid solution having an acid content of 25wt% to 85wt%.
Further defined, the alkali is provided by its corresponding alkali solution, the alkali content in the alkali solution being 18-20wt%.
The beneficial effects are that: according to the invention, the two-stage cavitation treatment with different pressures is adopted for the reaction liquid obtained after the alkali liquid is added, so that the oil phase in the reaction liquid is changed into small liquid drops close to nano-scale, and impurities in the reaction liquid are exposed and fully contacted with alkali to react; and the two-stage cavitation treatment can generate high-energy phenomenon, and the following effects can be obtained:
1. so that part of non-hydrated phosphatide is converted into hydrated phosphatide, the use of acid is reduced, the use of alkali is reduced when the use of acid is reduced, the acid is reduced by about 40%, and the consumption of alkali is reduced by about 20%;
2. the cavitation treatment can lead the generated product liquid 1 (mainly the mixture of sodium fatty acid and phospholipid) to be more orderly arranged, the neutral oil is reduced, the centrifugal separation of the subsequent working section is very beneficial, the oil content in the soapstock obtained by the centrifugal separation is reduced to below 30 percent, and the oil yield can be effectively improved by about 0.15 to 0.25 percent.
Detailed Description
Example 1
The oil used in this example had an impurity content of 0.2wt% to be removed, and the first cavitation treatment and the second cavitation treatment were carried out in a cavitation apparatus, the model of which was CM1500, the model of which was RSE220, the concentration of sodium hydroxide in a sodium hydroxide solution was 18wt%, and the content of phosphoric acid in a phosphoric acid solution was 85wt%.
A method for reducing the oil content in byproduct soapstock of a refining process based on cavitation technology, comprising the following steps:
s1, heating oil to 70 ℃, and adding a phosphoric acid solution into the oil for reaction for 60 minutes to obtain a reaction solution 1, wherein the adding amount of the phosphoric acid solution is 0.15 kg/ton of oil;
s2, adding sodium hydroxide solution into the reaction solution 1, and then statically mixing for 0.5-1.5 seconds to obtain a reaction solution 2, wherein the addition amount of the sodium hydroxide solution is 3.5 kg/ton of oil;
s3, boosting the pressure of the reaction liquid 2 to 55bar by a high-pressure pump, and entering a cavitation device for the first cavitation treatment;
s4, reducing the pressure to 8bar after the first cavitation treatment, and then entering a cavitation device for the second cavitation treatment to obtain a product liquid 1;
s5, adding water with the temperature of 85 ℃ into the product liquid 1, wherein the adding amount of the water is 0.2wt% of the product liquid 1, and the reaction time is 6 minutes, so as to obtain a product liquid 2;
s6, centrifugally separating the product liquid 2 by adopting a centrifugal machine to obtain soapstock, wherein the rotating speed of the centrifugal machine is 4500rpm.
The soapstock obtained in this example was analyzed for oil content and the yield of soapstock was calculated, and the results showed that the oil content in the soapstock was 27wt% and the yield of the soapstock was 1.9%.
Example 2
The oil used in this example had an impurity content of 0.1wt% to be removed, and the first cavitation treatment and the second cavitation treatment were carried out in a cavitation apparatus, the model of which was CM2500, the model of which was RSE300, the concentration of citric acid in the citric acid solution was 55wt%, and the concentration of potassium hydroxide solution was 19.5wt%.
A method for reducing the oil content in byproduct soapstock of a refining process based on cavitation technology, comprising the following steps:
s1, heating oil to 80 ℃, and adding citric acid solution into the oil to react for 90 minutes to obtain a reaction solution 3, wherein the addition amount of the citric acid solution is 8 kg/ton of oil;
s2, adding a potassium hydroxide solution into the reaction solution 3, and then statically mixing for 1.5 seconds to obtain a reaction solution 4, wherein the addition amount of the potassium hydroxide solution is 5 kg/ton of oil;
s3, boosting the pressure of the reaction liquid 4 to 65bar by a high-pressure pump, and adding the reaction liquid into a cavitation device for primary cavitation treatment;
s4, reducing the pressure to 13bar after the first cavitation treatment, and adding the pressure to a cavitation device for the second cavitation treatment to obtain a product liquid 3;
s5, adding 93 ℃ water into the product liquid 3, wherein the adding amount of the water is 0.3wt% of the product liquid 3, and the reaction time is 8 minutes, so as to obtain a product liquid 4;
s6, centrifugally separating the product liquid 4 by adopting a centrifugal machine to obtain soapstock, wherein the rotating speed of the centrifugal machine is 5000rpm.
The soapstock obtained in this example was analyzed for oil content and the yield of soapstock was calculated, and the results showed that the oil content in the soapstock was 29wt% and the yield of the soapstock was 2.1%.
Example 3
The oil used in this example had a content of 0.1wt% of impurities to be removed, and the first cavitation treatment and the second cavitation treatment were carried out in a cavitation apparatus, the model of which was CM3000, the model of which was RSE300, the concentration of phosphoric acid in the phosphoric acid solution was 25wt%, and the concentration of sodium hydroxide in the sodium hydroxide solution was 20wt%.
A method for reducing the oil content in byproduct soapstock of a refining process based on cavitation technology, comprising the following steps:
s1, heating oil to 88 ℃, and adding a phosphoric acid solution into the oil to react for 1.5 hours to obtain a reaction solution 5, wherein the adding amount of the phosphoric acid solution is 0.5 kg/ton of oil;
s2, adding sodium hydroxide solution into the reaction solution 5, and then statically mixing for 1.5 seconds to obtain a reaction solution 6, wherein the addition amount of the sodium hydroxide solution is 3 kg/ton of oil;
s3, boosting the pressure of the reaction liquid 6 to 70bar by a high-pressure pump, and adding the reaction liquid into a cavitation device for primary cavitation treatment;
s4, reducing the pressure to 16bar after the first cavitation treatment, and adding the pressure to a cavitation device for the second cavitation treatment to obtain a product liquid 5;
s5, adding water with the temperature of 90 ℃ into the product liquid 5, wherein the adding amount of the water is 0.5wt% of the product liquid 5, and the reaction time is 20 minutes, so as to obtain a product liquid 6;
s6, carrying out centrifugal separation on the product liquid 6 by adopting a centrifugal machine to obtain soapstock, wherein the rotating speed of the centrifugal machine is 6500rpm.
The soapstock obtained in this example was analyzed for oil content and the yield of soapstock was calculated, and the results showed that the oil content in the soapstock was 30wt% and the yield of the soapstock was 2.15%.
Comparative example 1
In this example, the second cavitation step was omitted compared to example 3, the remainder being the same.
The soapstock obtained in the comparative example was analyzed for oil content and the yield of the soapstock was calculated, and the result showed that the oil content in the soapstock was 35wt% and the yield of the soapstock was 2.5%.
Comparative example 2
In comparison with example 3, this comparative example omits the first cavitation step, the remainder being identical.
The soapstock obtained in the comparative example was analyzed for oil content and the yield of the soapstock was calculated, and the result showed that the oil content in the soapstock was 35wt% and the yield of the soapstock was 2.5%.
Comparative example 3
Compared to example 3, this comparative example omits the first cavitation step and the second cavitation step, the remainder being identical.
The soapstock obtained in this comparative example was analyzed for oil content and the yield of the soapstock was calculated, and the result showed that the oil content in the soapstock was 38wt% and the yield of the soapstock was 2.9%.
As can be seen from example 3 and comparative examples 1 to 3, the oil content in the soapstock is significantly reduced by cavitation treatment, and the oil content in the soapstock obtained by the two-stage cavitation and the pressure control of the two-stage cavitation is lower than that obtained by the one-stage high-pressure or low-pressure cavitation and the yield is lower; the oil content and yield of soapstock were not as good as in example 3.
Finally, it should be noted that: the foregoing description is only of the preferred embodiments of the invention and is not intended to limit the scope of the invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A method for reducing the oil content in byproduct soapstock of a refining process based on cavitation technology, which is characterized by comprising the following steps:
heating the oil to 68-88 ℃, and adding acid into the oil to react for 60-90 minutes to obtain a reaction liquid 1;
adding alkali liquor into the reaction liquid 1, and then statically mixing for 5-15 minutes to obtain a reaction liquid 2;
the reaction liquid 2 is pressurized to 55-75bar for the first cavitation treatment;
reducing the pressure to 8-20bar after the first cavitation treatment, and carrying out the second cavitation treatment to obtain a product liquid 1;
adding water with the temperature of 85-95 ℃ into the product liquid 1, wherein the addition amount of the water is 0.2-0.5 wt% of the product liquid 1, and the reaction time is 5-20 minutes, so as to obtain product liquid 2;
and (3) centrifuging the product liquid 2 to obtain nigre, wherein the centrifugal speed is 4500-6500rpm.
2. The method for reducing the oil content of the byproduct soapstock of a refining process based on cavitation technology of claim 1, wherein the acid is phosphoric acid or citric acid.
3. The method for reducing the oil content of the byproduct soapstock of a refining process based on cavitation technology of claim 2, wherein the base is potassium hydroxide or sodium hydroxide.
4. The method for reducing the oil content of the byproduct soapstock of a refining process based on cavitation techniques of claim 1, wherein the pressure of the first cavitation process is 63-68bar.
5. The method for reducing the oil content of the byproduct soapstock of a refining process based on cavitation techniques of claim 1, wherein the pressure of the second cavitation process is 11-14bar.
6. The method for reducing the oil content in the by-product soapstock of a refining process based on cavitation technology of claim 1, wherein the heated oil is at a temperature of 75-85 ℃.
7. The method for reducing the oil content of the byproduct soapstock of a refining process based on cavitation technology of claim 2, wherein the acid is provided by its corresponding acid solution, the acid content in the acid solution being 25wt% to 85wt%.
8. A method of reducing the oil content of the by-product soapstock of a refining process based on cavitation technology as claimed in claim 3, wherein the alkali is provided by its corresponding alkali solution, the alkali content in the alkali solution being 18-20wt%.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1292126A (en) * | 1968-12-17 | 1972-10-11 | Unilever Ltd | Process for splitting soapstock |
| CN104711112A (en) * | 2013-12-17 | 2015-06-17 | 中机康元粮油装备(北京)有限公司 | Method for realization of combined production of high quality rice bran oil and ferulic acid from rice bran |
| CN108348856A (en) * | 2016-09-09 | 2018-07-31 | 因温特国际有限公司 | The method for preparing free fatty and derivative of fatty acid by mixing lipid feedstocks or soap stock |
| CN113308299A (en) * | 2021-05-18 | 2021-08-27 | 益海(广州)粮油工业有限公司 | Grease chemical refining production process using citric acid to replace phosphoric acid |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10640729B2 (en) * | 2018-03-21 | 2020-05-05 | Arisdyne Systems, Inc. | Methods for reducing soap formation during vegetable oil refining |
-
2021
- 2021-10-11 CN CN202111183729.3A patent/CN113736561B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1292126A (en) * | 1968-12-17 | 1972-10-11 | Unilever Ltd | Process for splitting soapstock |
| CN104711112A (en) * | 2013-12-17 | 2015-06-17 | 中机康元粮油装备(北京)有限公司 | Method for realization of combined production of high quality rice bran oil and ferulic acid from rice bran |
| CN108348856A (en) * | 2016-09-09 | 2018-07-31 | 因温特国际有限公司 | The method for preparing free fatty and derivative of fatty acid by mixing lipid feedstocks or soap stock |
| CN113308299A (en) * | 2021-05-18 | 2021-08-27 | 益海(广州)粮油工业有限公司 | Grease chemical refining production process using citric acid to replace phosphoric acid |
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