CN117003846A - Production method of zein - Google Patents
Production method of zein Download PDFInfo
- Publication number
- CN117003846A CN117003846A CN202210448228.1A CN202210448228A CN117003846A CN 117003846 A CN117003846 A CN 117003846A CN 202210448228 A CN202210448228 A CN 202210448228A CN 117003846 A CN117003846 A CN 117003846A
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- China
- Prior art keywords
- gluten meal
- corn gluten
- zein
- extraction
- production method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 229920002494 Zein Polymers 0.000 title claims abstract description 23
- 239000005019 zein Substances 0.000 title claims abstract description 23
- 229940093612 zein Drugs 0.000 title claims abstract description 23
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000000843 powder Substances 0.000 claims abstract description 11
- 240000008042 Zea mays Species 0.000 claims description 40
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 40
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 40
- 235000005822 corn Nutrition 0.000 claims description 40
- 108010068370 Glutens Proteins 0.000 claims description 31
- 235000021312 gluten Nutrition 0.000 claims description 31
- 235000012054 meals Nutrition 0.000 claims description 30
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical group CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 21
- 238000000605 extraction Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 16
- 239000003960 organic solvent Substances 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- 230000001476 alcoholic effect Effects 0.000 claims description 6
- 229920002472 Starch Polymers 0.000 claims description 5
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 5
- 235000019698 starch Nutrition 0.000 claims description 5
- 239000008107 starch Substances 0.000 claims description 5
- 238000001291 vacuum drying Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims 1
- -1 propylene alcohol Chemical compound 0.000 claims 1
- 108060006613 prolamin Proteins 0.000 abstract description 16
- 235000019441 ethanol Nutrition 0.000 description 24
- 239000000243 solution Substances 0.000 description 17
- 235000018102 proteins Nutrition 0.000 description 9
- 108090000623 proteins and genes Proteins 0.000 description 9
- 102000004169 proteins and genes Human genes 0.000 description 9
- KBPHJBAIARWVSC-XQIHNALSSA-N trans-lutein Natural products CC(=C/C=C/C=C(C)/C=C/C=C(C)/C=C/C1=C(C)CC(O)CC1(C)C)C=CC=C(/C)C=CC2C(=CC(O)CC2(C)C)C KBPHJBAIARWVSC-XQIHNALSSA-N 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- RWRDLPDLKQPQOW-UHFFFAOYSA-N Pyrrolidine Chemical compound C1CCNC1 RWRDLPDLKQPQOW-UHFFFAOYSA-N 0.000 description 4
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 4
- 238000004925 denaturation Methods 0.000 description 4
- 230000036425 denaturation Effects 0.000 description 4
- 235000012680 lutein Nutrition 0.000 description 4
- 229960005375 lutein Drugs 0.000 description 4
- 239000001656 lutein Substances 0.000 description 4
- KBPHJBAIARWVSC-RGZFRNHPSA-N lutein Chemical compound C([C@H](O)CC=1C)C(C)(C)C=1\C=C\C(\C)=C\C=C\C(\C)=C\C=C\C=C(/C)\C=C\C=C(/C)\C=C\[C@H]1C(C)=C[C@H](O)CC1(C)C KBPHJBAIARWVSC-RGZFRNHPSA-N 0.000 description 4
- ORAKUVXRZWMARG-WZLJTJAWSA-N lutein Natural products CC(=C/C=C/C=C(C)/C=C/C=C(C)/C=C/C1=C(C)CCCC1(C)C)C=CC=C(/C)C=CC2C(=CC(O)CC2(C)C)C ORAKUVXRZWMARG-WZLJTJAWSA-N 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- FJHBOVDFOQMZRV-XQIHNALSSA-N xanthophyll Natural products CC(=C/C=C/C=C(C)/C=C/C=C(C)/C=C/C1=C(C)CC(O)CC1(C)C)C=CC=C(/C)C=CC2C=C(C)C(O)CC2(C)C FJHBOVDFOQMZRV-XQIHNALSSA-N 0.000 description 4
- JKQXZKUSFCKOGQ-JLGXGRJMSA-N (3R,3'R)-beta,beta-carotene-3,3'-diol Chemical compound C([C@H](O)CC=1C)C(C)(C)C=1/C=C/C(/C)=C/C=C/C(/C)=C/C=C/C=C(C)C=CC=C(C)C=CC1=C(C)C[C@@H](O)CC1(C)C JKQXZKUSFCKOGQ-JLGXGRJMSA-N 0.000 description 3
- JKQXZKUSFCKOGQ-LQFQNGICSA-N Z-zeaxanthin Natural products C([C@H](O)CC=1C)C(C)(C)C=1C=CC(C)=CC=CC(C)=CC=CC=C(C)C=CC=C(C)C=CC1=C(C)C[C@@H](O)CC1(C)C JKQXZKUSFCKOGQ-LQFQNGICSA-N 0.000 description 3
- QOPRSMDTRDMBNK-RNUUUQFGSA-N Zeaxanthin Natural products CC(=C/C=C/C=C(C)/C=C/C=C(C)/C=C/C1=C(C)CCC(O)C1(C)C)C=CC=C(/C)C=CC2=C(C)CC(O)CC2(C)C QOPRSMDTRDMBNK-RNUUUQFGSA-N 0.000 description 3
- JKQXZKUSFCKOGQ-LOFNIBRQSA-N all-trans-Zeaxanthin Natural products CC(=C/C=C/C=C(C)/C=C/C=C(C)/C=C/C1=C(C)CC(O)CC1(C)C)C=CC=C(/C)C=CC2=C(C)CC(O)CC2(C)C JKQXZKUSFCKOGQ-LOFNIBRQSA-N 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 235000010930 zeaxanthin Nutrition 0.000 description 3
- 239000001775 zeaxanthin Substances 0.000 description 3
- 229940043269 zeaxanthin Drugs 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 150000002632 lipids Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 108010064851 Plant Proteins Proteins 0.000 description 1
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 description 1
- 238000010960 commercial process Methods 0.000 description 1
- 239000002285 corn oil Substances 0.000 description 1
- 235000005687 corn oil Nutrition 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 235000021118 plant-derived protein Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/415—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from plants
- C07K14/425—Zeins
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Biochemistry (AREA)
- Gastroenterology & Hepatology (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Medicinal Chemistry (AREA)
- Molecular Biology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Botany (AREA)
- Peptides Or Proteins (AREA)
Abstract
The invention relates to a production method of zein, which uses alcohol solution to extract primary dehydrated zein powder, and the obtained zein solution is concentrated at low temperature and then is dried at low temperature in vacuum. The production method can obtain high-quality prolamin products and reduce the production cost.
Description
Technical Field
The invention relates to a production method of zein. In particular, the present invention relates to a process for extracting zein from primarily dehydrated corn gluten meal at a lower temperature.
Background
Zein (zein) is a plant protein that is widely found in plants, is readily soluble in 80% to 92% ethanol or 70% to 80% acetone, and is insoluble in water or absolute ethanol. Zein has strong moisture resistance, heat resistance, fat resistance and film forming property, and can be used in the industries of food, medicine, textile, paper making and the like.
The existing method for extracting zein generally adopts a Corn Gluten Meal (CGM) finished product as a raw material. Corn gluten meal is also called corn gluten meal, and is usually prepared by preparing corn coarse starch milk from corn grains through a wet grinding process, and performing steps of hydrolysis, separation, concentration, drying and the like. Drying at high temperatures can cause protein denaturation,
in addition, the existing method for extracting the prolamin is to combine ethanol with higher concentration and corn gluten meal to obtain saturated prolamin leaching solution, then add absolute ethanol into the leaching solution, and centrifuge to obtain ethanol solution with higher concentration and prolamin precipitate, wherein the ethanol content of the prolamin precipitate is about 30%. The prolamin is then coated in a dryer for drying. The ethanol content in the dried prolamin is 2-3%. This method has two disadvantages: firstly, ethanol is difficult to recycle, so that loss is caused; secondly, the absolute ethyl alcohol used for precipitation is diluted in the production process, if distillation is needed to reach the absolute ethyl alcohol again, the process is difficult and has huge energy consumption, and a large amount of azeotropic ethyl alcohol with concentration of 30% remained in the distillation still is discharged due to unavailable use, thus not only causing waste but also causing environmental pollution. These two problems result in excessive production costs of prolamin and limit market applications.
Therefore, there is a need to develop a commercial process for zein that prevents protein denaturation, increases ethanol utilization, and reduces production costs.
Disclosure of Invention
The invention mainly aims to provide a production method of zein, which aims to solve the problems of zein denaturation and difficult recovery of ethanol in the production process in the prior art.
In order to achieve the above object, the present invention provides a method for producing zein, which is characterized in that a primary dehydrated zein powder is extracted with an alcohol solution, and the obtained zein solution is concentrated at a low temperature and then dried in vacuum at a low temperature.
In a preferred embodiment, the primary dehydrated corn gluten meal is produced by dehydrating yellow slurry water produced during the starch production process with a plate frame or centrifuge.
In a preferred embodiment, the primary dehydrated corn gluten meal is treated with an organic solvent prior to extraction with an alcoholic solution.
In a preferred embodiment, the organic solvent is selected from ethyl acetate, n-hexane. Particularly preferably, the organic solvent is ethyl acetate.
In a preferred embodiment, the production process comprises recovering the organic solvent.
In a preferred embodiment, the alcoholic solution is selected from the group consisting of ethylene glycol, allyl alcohol, ethanol solutions. Particularly preferably, the alcoholic solution is an ethanol solution
In a preferred embodiment, the primary dehydrated corn gluten meal is granulated prior to extraction with an alcoholic solution.
In a preferred embodiment, the primary dehydrated corn gluten meal is subjected to a low temperature oven-drying prior to extraction with an alcoholic solution.
In a preferred embodiment, the production process comprises recovering the alcohol solution.
In a preferred embodiment, the prolamin-containing extraction mix is cryogenically concentrated prior to vacuum drying. Particularly preferably, the mixed solution is concentrated to 10% to 30% of the original volume.
The term "low temperature" as used herein means a temperature of 35 to 65℃and preferably a temperature of 50 to 60 ℃.
The production method is carried out at low temperature, so that protein denaturation caused by high temperature is avoided, and a high-quality prolamin product can be obtained. Meanwhile, the production cost can be reduced by recycling the organic solvent and the alcohol solution used in the production process.
Drawings
FIG. 1 is a schematic flow chart of the method for producing prolamin according to the present invention.
Detailed Description
The invention uses primary dehydrated corn protein powder as a production raw material. The primary dehydrated corn gluten meal is an intermediate of corn gluten meal, such as corn gluten meal dehydrated by a plate frame or a centrifuge from yellow serofluid generated in the process of producing starch. The primary dehydrated corn gluten meal is not subjected to high temperature drying.
The primary dehydrated corn protein powder (the water content is 40% -60%) is put into a vacuum dryer for drying, the drying temperature is 45 ℃ -80 ℃, preferably 50 ℃ -65 ℃, and the humidity of the dried corn protein powder is 10% -14%.
The dried corn gluten meal can be granulated (pelleted) by a conventional feed granulator to form corn gluten meal granules. The size of the pelletization can be set according to the requirement. The granulating can reduce the use amount of the organic solvent, so that the extraction process of the organic solvent is smoother, and the cost of the required organic solvent is reduced.
After granulation, the corn gluten meal particles are put into a leacher, and organic solvents (solid-liquid ratio is 1:5-1:10) such as normal hexane, ethyl acetate, ethanol and the like are used for extracting corn oil substances containing lutein.
The lipid-containing organic solvent is then concentrated by evaporation or vacuum to yield lipid materials such as lutein and zeaxanthin. The organic solvent is recovered and recycled. Lutein and zeaxanthin are both of high commercial value and therefore can be sold separately. The use of organic solvents for such extraction does not significantly increase the cost of production, since about 98% of the organic solvent can be recovered, and the income of lutein and zeaxanthin can offset the cost, thus greatly reducing the cost of producing zein.
Adding the corn gluten meal after pigment extraction into an extraction tank.
Alcohol solution (solid-liquid ratio 1:5-1:10) with concentration of 65% -95% such as ethylene glycol, allyl alcohol or ethanol is added into the extraction tank, the temperature is controlled at 30-70 ℃ and the duration is 2-4 hours.
After the extraction mixed liquor (containing prolamine and corn gluten meal) is centrifuged by a centrifugal machine, the liquid part can be sent to a mixed liquor temporary storage tank, then is sent to a filter by a pump, and the solution is filtered by the filter to remove impurities and enters a concentration tank. After low-temperature concentration at 35-65 deg.c, preferably 50-60 deg.c, the alcohol soluble protein content is 10-30% of the original volume, and vacuum drying in vacuum drier with pump, preferably 50-60 deg.c.
Pulverizing the dried prolamin with pulverizer, and packaging.
On the other hand, the extract mixture (containing prolamine and zein powder) was centrifuged with a centrifuge, and the resulting solid was precipitated as zein powder containing alcohol. The corn gluten meal can be dried at high temperature to obtain solid corn gluten meal. The obtained solid corn protein powder (without prolamin) can be used in feed.
The alcohol solvent contained in the corn gluten meal can be recovered while drying at high temperature.
The cost of producing zein can be greatly reduced by preparing corn gluten meal for feed and recycling alcohol solvent.
The extraction rate of the prolamin of the method can reach 93 to 95 percent, which is far higher than that of the old process by 60 to 70 percent.
Examples
And (3) putting the corn gluten meal (the water content is 40%) subjected to filter pressing by a plate filter press of a starch factory into a vacuum dryer for drying, wherein the drying temperature is 45 ℃, and the humidity of the dried corn gluten meal is 10%.
Granulating the dried corn protein powder by using a granulator.
After granulation, the corn gluten meal particles are put into a leacher and extracted by ethyl acetate to obtain the corn gluten (solid-liquid ratio is 1:6). Ethyl acetate was concentrated in vacuo on corn yellow resin and returned to the solvent tank for further use.
Adding the corn gluten meal after pigment extraction into an extraction tank.
85% ethanol (solid-liquid ratio is 1:6) is added into the extraction tank, and the temperature is controlled at about 35 ℃ for 3 hours.
After the extraction mixed liquor is centrifuged by a centrifugal machine, the liquid part is sent to a mixed liquor temporary storage tank, then is sent to a filter by a pump, and the solution is filtered by the filter to remove impurities and enters a concentration tank. Concentrating at 60deg.C to 10% of original volume, and vacuum drying at 60deg.C with gear pump. Pulverizing the dried prolamin with pulverizer, and packaging.
And (5) delivering the solid part separated by the centrifugal machine into a dryer for drying to obtain corn protein powder for feed, and recovering ethanol.
According to measurement and calculation, the extraction rate of the prolamin is 93%, the recovery rate of the ethyl acetate is 98%, and the recovery rate of the ethanol is 97.5%.
Claims (10)
1. A process for preparing zein includes such steps as extracting primary dewatered zein powder from alcohol solution, low-temp concentrating, and low-temp vacuum drying.
2. The method of claim 1, wherein the primary dehydrated corn gluten meal is produced by dehydrating yellow slurry produced during starch production with a plate frame or centrifuge.
3. The method of claim 1, wherein the primary dehydrated corn gluten meal is treated with an organic solvent prior to extraction with an alcohol solution.
4. A production method according to claim 3, wherein the organic solvent is selected from ethyl acetate and n-hexane.
5. A production method according to claim 3, wherein the production method comprises recovering the organic solvent.
6. The method of claim 1, wherein the alcoholic solution is selected from the group consisting of ethylene glycol, propylene alcohol, and ethanol solutions.
7. The method of claim 1, wherein the primary dehydrated corn gluten meal is granulated prior to extraction with an alcohol solution.
8. The method of claim 1, wherein the primary dehydrated corn gluten meal is subjected to low temperature drying prior to extraction with an alcohol solution.
9. The production method according to claim 1 or 8, wherein the low temperature is 35 to 65 ℃.
10. The method of claim 1, wherein the method of producing comprises recovering an alcohol solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210448228.1A CN117003846A (en) | 2022-04-27 | 2022-04-27 | Production method of zein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210448228.1A CN117003846A (en) | 2022-04-27 | 2022-04-27 | Production method of zein |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117003846A true CN117003846A (en) | 2023-11-07 |
Family
ID=88565834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210448228.1A Pending CN117003846A (en) | 2022-04-27 | 2022-04-27 | Production method of zein |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117003846A (en) |
-
2022
- 2022-04-27 CN CN202210448228.1A patent/CN117003846A/en active Pending
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