CN107469790A - Remove filter medium, filter core and the preparation method of aflatoxin in edible oil - Google Patents
Remove filter medium, filter core and the preparation method of aflatoxin in edible oil Download PDFInfo
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- CN107469790A CN107469790A CN201710799706.2A CN201710799706A CN107469790A CN 107469790 A CN107469790 A CN 107469790A CN 201710799706 A CN201710799706 A CN 201710799706A CN 107469790 A CN107469790 A CN 107469790A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/261—Synthetic macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/14—Diatomaceous earth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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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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- Oil, Petroleum & Natural Gas (AREA)
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- Edible Oils And Fats (AREA)
Abstract
The present invention relates to edible oil process field, discloses a kind of preparation method for being used to remove the filter medium of aflatoxin in edible oil, comprises the following steps：A) ultra-high molecular weight polyethylene powder, active powdered carbon, atlapulgite, diatomite and gas generation agent are mixed, obtains mixture, the ultra-high molecular weight polyethylene powder, active powdered carbon, atlapulgite, the weight ratio of diatomite and gas generation agent are 180 ~ 400:15~100:70~150:60~150:170~250；B) by step a）The mixture of gained is suppressed, sinters, cooled down in a mold.The present invention also provides the filter medium prepared by the above method and filter core, oil purifier and the oil strain kettle using the filter medium.In the present invention, all raw materials are nontoxic and environment-friendly mineral material, manufactured filter medium or filter core reach i.e. discardable after service life, the drawbacks of overcoming non-environmental protection type non-degradable material, and secondary pollution is effectively prevented while edible oil is purified.After testing, the filter core to the clearance of aflatoxin in frying oil more than 98%.
Description
Technical field
Filter medium of aflatoxin and preparation method thereof in edible oil is removed the present invention relates to a kind of, and by the filtering
Filter core, oil purifier and the oil strain kettle that medium is formed.
Background technology
Aflatoxin (aflatoxin) is also referred to as aflatoxins, there is violent acute toxicity and obvious to humans and animals
Chronic toxicity, be a kind of extremely strong carcinogenic, mutagenic extremely toxic substance.Aflatoxin major determinant people and the liver of animal
Tissue, while kidney also can be undermined.Aflatoxin can also reduce immunocompetence, can induce kinds cancer for example stomach cancer, kidney,
The tumour at the positions such as the carcinoma of the rectum, breast cancer, ovary and small intestine.Aflatoxin in 1993 is by World Health Organization's cancer research machine
Structure regards as a kind of carcinogenic substance, in the food of natural contamination again, its toxicity and carcinogenicity the most common with aflatoxin B1
Also it is most strong, its toxicity is 10 times, 68 times of arsenic of cyanide.
Aflatoxin mainly pollutes oil and foodstuffs, animals and plants food etc., such as peanut, corn, rice, wheat, beans, heavily fortified point
Fruit, meat, milk and milk productses, aquatic products etc. are potentially contaminated, wherein with peanut and corn pollution most serious.Due to by
Influenceed to raw material, probability of the peanut oil containing aflatoxin is maximum in edible oil, content also highest.The country newly expresses oil from peanuts
In, aflatoxin is often higher, it is necessary to be removed processing.According to South Daily on July 11st, 2017, in Guangdong Province's disease
During control center is inspected by random samples in recent years, peanut oil aflatoxin B1 pollution rate in bulk is up to 20%.
GB2716-2005《Edible vegetable oil sanitary standard》Provide that aflatoxin B1 is most in peanut oil, maize germ
It is 20 μ g/kg to limit the quantity greatly, and the maximum limitation of aflatoxin B1 is 10 μ g/kg in other edible vegetable oils.
Mainly include physics, chemistry and biological method for the minimizing technology of aflatoxin in edible oil at present.Physics
Method is mainly absorption method and irradiation method；Chemical method mainly carries out reaction treatment using chemical reagent to product；Biology side
Method is mainly handled by the way of enzymolysis.Conventional adsorbent includes yeast cell wall, alumino-silicate etc., but can not solve
Except the toxicity of aflatoxin；The reaction of chemical reagent easily causes the residual of reagent；Enzyme digestion reaction is complicated, is difficult to control.Cause
This, existing market is badly in need of finding a kind of simple, safe and effective technology for removing aflatoxin.
The content of the invention
Present invention solves the technical problem that being to provide a kind of filter medium and preparation method thereof, the filter medium is to edible oil
In aflatoxin clearance it is high, additionally provide the filter core being made up of this filter medium, oil purifier and oil strain kettle.
To solve the above problems, the present invention uses following technical scheme：
The preparation method of the filter medium of aflatoxin, comprises the following steps in a kind of removal edible oil：
A) ultra-high molecular weight polyethylene powder, activated carbon, atlapulgite, diatomite and gas generation agent are mixed, obtains mixture, it is described
Ultra-high molecular weight polyethylene powder, active powdered carbon, atlapulgite, the weight ratio of diatomite and gas generation agent are 180 ~ 400:15~100:
70~150:60~150:170~250；Ultra-high molecular weight polyethylene powder in more preferably described raw material, active powdered carbon, atlapulgite,
The weight of diatomite and gas generation agent ratio is 200 ~ 320:25~60:70~140:180~240.
B) by step a）The mixture of gained is suppressed, sinters, cooled down in a mold；
Pressing pressure prioritizing selection is 0.4MPa ~ 1Mpa；Sintering temperature is 200 DEG C ~ 245 DEG C；Sintering time is 90 ~ 150min；
Being cooled to 30 DEG C ~ 50 DEG C can be stripped.
Ultra-high molecular weight polyethylene molecular weight described in patent of the present invention is 1,000,000 ~ 7,000,000.It is preferred that use weight average molecular weight
The polyethylene of position 250 ~ 4,000,000.Ultra-high molecular weight polyethylene can obtain from domestic production producer, as Beijing Orient petrochemical industry has
Second auxiliary factory of limit company can provide M-I types（Molecular weight is 150 ± 500,000）, M-II types（Molecular weight is 250 ± 500,000）、M-III
Type（Molecular weight is 350 ± 500,000）, M-IV types（Molecular weight is more than 4,000,000）The product of equal-specification.Ultra-high molecular weight polyethylene
One be the effect for bonding and being formed filter medium skeleton, furthermore with ultra-high molecular weight polyethylene by compacting, sintering obtains
Filter medium, easily form micropore, the impurity in adsorbing edible oil can be played a part of.
The particle diameter of the ultra-high molecular weight polyethylene is 74 μm~110 μm.
Activated carbon has very big specific surface area, to the inorganic or organic substance in gas, solution and colloidal solid etc. all
There is good adsorption capacity.Activated carbon is brilliant except the order crystallites area with two dimension and less regular crosslinking charcoal hexagonal space
There are a variety of oxygen containing functional groups outside the impalpable structure of lattice, on surface, this allows for activated carbon, and both adsorbable polar substances be also
Adsorbable apolar substance.
According to the difference of raw material sources, activated carbon is preferably divided into wood activated charcoal, mineral raw material activated carbon and other originals
Activated carbon made of material etc..Wherein, the wood activated charcoal preferably includes cocoanut active charcoal, apricot shell activated carbon, wooden burgy；Institute
It is activated carbon made of raw material to state mineral raw material activated carbon and preferably include various coals and oil and its processing product；Other raw materials
Manufactured activated carbon preferably includes scrap rubber, activated carbon made of waste plastics.
Present invention preferably employs the activated carbon using coconut husk material as source that particle diameter is 90~130 μm.
Atlapulgite be by acid activation handle clay --- mainly bentonite, industrially referred to as atlapulgite or
Bleaching earth.Bentonite (Bentonite) also known as amargosite, bentonite, sweet soil, bentonite, clay, from mud, popular name claim white clay, be
Clay mineral using montmorillonite as main component, its chemical composition quite stable, it is described as " omnipotent stone ".Montmorillonite is typical
One of layer silicate mineral, but be that space is especially big between layers with its pond layer silicate mineral dissimilarity, this
Sample can in layer and layer the hydrone containing indefinite quantity and exchangeability sun from.Montmorillonite is by two layers of silicon that top couples altogether
Oxygen tetrahedral sheet presss from both sides the aluminium of one layer of common rib connection（Magnesium）Oxygen（Hydrogen-oxygen）Octahedral sheet, form 2:Silicate mine of 1 type containing the crystallization water
Thing.It is one of mineral that product body structure variation is most strong in clay minerals big family.Pass through the experiment knot of diffractometer slow scanning
Fruit show montmorillonite granularity oneself close to nanoscale, be natural nano-material.
The primary chemical composition of atlapulgite：SiO2,50~70%；Al2O3,15~30%；A small amount of MgO, CaO, Fe2O3,
Na2O, K2O, TiO2.Outward appearance is off-white powder, odorless, tasteless, nontoxic, and absorption property is very strong, can adsorb coloring matter and have
Machine material.It is widely used in the decolorizing and refining of mineral oil, animal and plant fat, wax processed and organic liquid.
Diatomite is made up of the remains of the very high diatom of oxycompound, radiolitid or sponge, is a kind of organic origin
Mineral, the silica type in diatom soil skeleton are similar to opal or aqueous silica, Zhejiang Province Shengzhou are mainly originated in China
City.Diatomite is in generally light yellow or light grey, and matter is soft, porous and light, and the special of natural diatomaceous earth can be observed under microscope
Porous configuration, this microcellular structure cause diatomite has to decolourize, the performance of drainage etc..
Generally diatomite can be modified out to improve its adsorption capacity, preferably, patent of the present invention is selected
With the modification infusorial earth powder after modification.
The described method that processing is modified to diatomite method known to those skilled in the art：Hydrochloric acid or sulphur
Sour acid-wash activation；Low temperature or high-temperature roasting activation, such as institute in United States Patent (USP) US2701240 and Chinese patent CN86106871A
The method of modifying of record；Hexadecane is used described in organics modifications method, such as Chinese patent CN200410079630.9
The method that base trimethylammonium (CTMA), cetylpyridinium chloride (CPC) and polyacrylamide limb are modified to diatomite.
After diatomite modification, oxide impurity content reduces, and SiO2 contents increase, and specific surface area and pore volume also increase
Greatly, so the carrier effect of modification infusorial earth is better than natural diatomaceous earth.
Preferably, the present invention is from the modification infusorial earth powder that particle diameter is 70 μm~120 μm.
Gas generation agent of the present invention is a kind of material for easily decomposing and producing a large amount of gases and causing hair engaging aperture to act on, wherein azo
Class compound, sodium acid carbonate, ammonium hydrogen carbonate, ammonium carbonate, sulphonyl nitrile compounds, oxalic acid etc. are its typical representatives.As excellent
Choosing, gas generation agent are at least one of azodicarbonamide, food grade ammonium bicarbonate, oxalic acid.Wherein, food grade ammonium bicarbonate
Claim AMMONIUM BICARBONATE FOOD GRADE, distinguished with technical grade ammonium hydrogen carbonate.Although technical grade ammonium hydrogen carbonate also plays the role of hair engaging aperture,
It may the impurity containing insalubrity, should not be used as frying oil filter medium raw materials for production.
The strong electrostatic force absorption of ultra-high molecular weight polyethylene, adsorption and atlapulgite, the diatomite of active powdered carbon
Collaboration adduction so that the clearance of aflatoxin reaches more than 98%, shows good filter effect.
In the present invention, it is not particularly limited for the source and purity of above-mentioned raw materials, it is preferably commercially available.
Although the present invention is for step a in above-mentioned preparation method）In used several raw materials more retouch in detail
State, but the present invention is not limited to such a theory.
In the present invention, can be that any will not significantly change the low of diameter of particle and size distribution for blend step
Shear mixer or agitator, such as the agitator with blunt impeller blade, drum-type blender, spiral agitator etc.,
Rotating speed will depending on blender type and but be advisable with avoiding kicking up dust.
Mixed powder is typically suppressed under the pressure no more than 1MPa.Prioritizing selection is filled into pre-designed
Mould in suppressed by pressurizeing, the material of pressure and mould therefor is adapted；Mould can be by aluminium, cast iron, steel or any suitable
When the material manufacture that can bear relevant pressure and temperature.Silicone oil can be selected in mould inner surface release agent application
Or any other commercially available releasing agent being hardly adsorbed onto on filter medium, processing release paper can also be used.
The present invention also provides a kind of filter core for having used above-mentioned filter medium.
The thickness of filter core is more than that 10mm is more particularly suitable, inside there is countless labyrinth-likes, sinuate duct, aflatoxin
It is adsorbed, block, retains wherein.
Present invention also offers a kind of oil purifier including above-mentioned filter medium or filter core.
Present invention also offers a kind of oil strain kettle including above-mentioned oil purifier.
Relative to prior art, the advantage of the invention is that the Huang that the technical scheme proposed can be removed in edible oil is bent
Mould toxin, clearance reach more than 98%, and so as to reach the purpose of purification edible oil, and method is simple, and cost is low, quick.
All raw materials are nontoxic and environment-friendly mineral material, and manufactured filter medium or filter core reached using the longevity
It is i.e. discardable after life, the drawbacks of overcoming non-environmental protection type non-degradable material, secondary dirt is effectively prevented while edible oil is purified
Dye.
Embodiment
In order to further illustrate the present invention, with reference to embodiments to aspergillus flavus poison in removal edible oil provided by the invention
The filter medium of element is described in detail.
Embodiment 1
（1）It is 120 μm of ultra-high molecular weight polyethylene powder 200g to weigh particle diameter, and the ultra-high molecular weight polyethylene is Beijing Orient stone
The M-II type products of oily second auxiliary factory of Chemical Co., Ltd., its molecular weight are 2,500,000；
（2）Activated carbon powder 20g is weighed, the particle diameter of the activated carbon is 90~130 μm；
（3）It is 80 ~ 110 μm of atlapulgite powder 75g to weigh particle diameter；
（4）Diatomite 65g is weighed, the diatomite place of production is Zhejiang Province Shengzhou, and particle diameter is 98 μm；
（5）Food grade ammonium bicarbonate 180g is weighed, purity reaches more than 99.99%；
（6）Above-mentioned five kinds of raw materials are put into mechanical agitator to stir 10 minutes and are well mixed；
（7）Mixed powder is suppressed under 0.7MPa hydraulic pressure, sintered 150 minutes at a temperature of 200 DEG C；
（8）60 DEG C are naturally cooled to, i.e. much filter mediums of micropore.
（9）If step（8）Suppressed in tubular die, then can obtain the filter core containing the filter medium.
Embodiment 2
（1）It is 100 μm of ultra-high molecular weight polyethylene powder 250g to weigh particle diameter, and the ultra-high molecular weight polyethylene is Beijing Orient stone
The M-II type products of oily second auxiliary factory of Chemical Co., Ltd., its molecular weight are 2,700,000；
（2）Activated carbon powder 28g is weighed, the particle diameter of the activated carbon is 90~130 μm；
（3）It is 80 ~ 110 μm of atlapulgite powder 80g to weigh particle diameter, originates from Dongguan atlapulgite drier and opens up the limited public affairs of gloomy chemical industry
Department；
（4）Diatomite 75g is weighed, the diatom place of production is Zhejiang Province Shengzhou, and particle diameter is 74 ~ 100 μm；
（5）90 grams of azodicarbonamide is weighed, purity reaches more than 99.99%；
（6）Above-mentioned five kinds of powder are put into mechanical agitator to stir 12 minutes and are well mixed；
（7）It is packed into tubular die, is suppressed under 0.9MPa hydraulic pressure, is sintered 130 minutes at a temperature of 285 DEG C；
（8）Naturally cool to 50 DEG C and then be stripped, be i.e. much tubulose filter cores of micropore.
Embodiment 3
（1）It is 104 μm of ultra-high molecular weight polyethylene powder 300g to weigh particle diameter, and the ultra-high molecular weight polyethylene is Beijing Orient stone
The M-III type products of oily second auxiliary factory of Chemical Co., Ltd., its molecular weight are 3,500,000；
（2）Activated carbon powder 30g is weighed, the particle diameter of the activated carbon is 90~130 μm；
（3）It is 80 ~ 110 μm of atlapulgite powder 95g to weigh particle diameter, originates from Guangzhou and looks forward to Tonghua Co., Ltd；
（4）Diatomite 90g is weighed, the diatomite place of production is Zhejiang Province Shengzhou, and particle diameter is 98 μm；
（5）Food grade ammonium bicarbonate 50g is weighed, purity reaches more than 99.99%；
（6）Above-mentioned five kinds of powder are put into mechanical agitator to stir 9 minutes and are well mixed；
（7）It is packed into tubular die, is suppressed under 0.5MPa hydraulic pressure, is sintered 100 minutes at a temperature of 300 DEG C；
（8）40 DEG C are naturally cooled to, i.e. much tubulose filter cores of micropore.
Embodiment 4
（1）It is 90 μm of ultra-high molecular weight polyethylene powder 360g to weigh particle diameter, and the ultra-high molecular weight polyethylene is Beijing Orient stone
The M-I type products of oily second auxiliary factory of Chemical Co., Ltd., its molecular weight are 1,500,000；
（2）Activated carbon powder 45g is weighed, the particle diameter of the activated carbon is 90~130 μm；
（3）It is 80 ~ 110 μm of atlapulgite powder 120g to weigh particle diameter；
（4）Diatomite 130g is weighed, the diatom place of production is Zhejiang Province Shengzhou, and particle diameter is 74 ~ 89 μm；
（5）100 grams of oxalic acid is weighed, purity reaches more than 99.99%；
（6）Above-mentioned five kinds of powder are put into mechanical agitator to stir 10 minutes and are well mixed；
（7）It is packed into tubular die, is suppressed under 1.0MPa hydraulic pressure, is sintered 150 minutes at a temperature of 240 DEG C；
（8）Naturally cool to 55 DEG C and then be stripped, be i.e. much tubulose filter cores of micropore.
Embodiment 5
The filter core of the gained of Example 1~4, liner two-layer nonwoven, outsourcing two-layer nonwoven, then in outer layer to wrap polypropylene more
Hole pattern, filter core both ends are bonded with connection end cap, are positioned in stainless steel or plastic casing, after testing, should for handling edible oil
Filter core is good to the removal effect of the aflatoxin in edible oil.As shown in table 1, for using the filter core for implementing 1~5 offer
To the content of the aflatoxin of edible oil before and after the processing.
Table 1 uses the aflatoxin content of filter core edible oil before and after the processing, unit：ppb.
As it can be seen from table 1 removing the aflatoxin in edible oil using the filter core of the present invention achieves good effect
Fruit, for clearance more than 98%, the filter core is especially suitable for the filtering needs of family or food and drink edible oil.
Above filter medium and preparation method thereof to aflatoxin in removal edible oil provided by the present invention and
Filter core is described in detail made of the filter medium, and applies principle and implementation of the specific embodiment to the present invention
Mode is set forth, and for those of ordinary skill in the art, the thought according to the present invention is in embodiment and application
It may be will change in scope in implementation process, this description should not be construed as limiting the invention.
Claims (7)
1. the present invention relates to a kind of filter medium of aflatoxin for being used to remove in edible oil and preparation method thereof, use this
Filter core, oil purifier and the oil strain kettle of filter medium, it is characterised in that comprise the following steps：
A) ultra-high molecular weight polyethylene powder, active powdered carbon, atlapulgite powder, diatomite in powder and gas generation agent are mixed, mixed
Thing, the ultra-high molecular weight polyethylene powder, active powdered carbon, atlapulgite powder, the weight ratio of diatomite in powder and gas generation agent for 180 ~
400:15~100:70~150:60~150:170~250；
B) by step a）The mixture of gained is suppressed, sinters, cooled down in a mold；
The pressing pressure is 0.4MPa ~ 1Mpa；The sintering temperature is 200 DEG C ~ 245 DEG C；The sintering time be 90 ~
150min；The chilling temperature is 40 DEG C ~ 60 DEG C.
2. preparation method according to claim 1, it is characterised in that the particle diameter of the ultra-high molecular weight polyethylene is 74 μm
~110 μm.
3. preparation method according to claim 1, it is characterised in that the diatomaceous particle diameter is 70 μm~120 μm.
What 4. preparation method according to any one of claim 1 to 3 obtained is used to remove aflatoxin in edible oil
Filter medium.
5. a kind of filter core, it is characterised in that be made up of the filter medium described in claim 4.
6. a kind of oil purifier, it is characterised in that including described in the filter medium described in claim 4 or claim 5
Filter core.
7. a kind of oil strain kettle, it is characterised in that including the oil purifier described in claim 6.
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| CN110122602A (en) * | 2019-05-14 | 2019-08-16 | 张玲 | A method of aflatoxin in removing cyperue esculentus edible oil |
| CN113318701A (en) * | 2021-05-20 | 2021-08-31 | 河源市食品检验所 | Removing aflatoxin B in soil-pressed peanut oil1Adsorbent and preparation method thereof |
| CN115350529A (en) * | 2022-08-01 | 2022-11-18 | 黄丽丽 | Preparation method of low-density sewage treatment material |
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| CN113318701A (en) * | 2021-05-20 | 2021-08-31 | 河源市食品检验所 | Removing aflatoxin B in soil-pressed peanut oil1Adsorbent and preparation method thereof |
| CN113318701B (en) * | 2021-05-20 | 2023-05-23 | 河源市食品检验所 | Removing aflatoxin B in soil pressed peanut oil 1 Is an adsorbent of (a) and a process for producing the same |
| CN115350529A (en) * | 2022-08-01 | 2022-11-18 | 黄丽丽 | Preparation method of low-density sewage treatment material |
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