CN113058568A - Oil-absorbing water-repellent diatomite filter aid and preparation method and application method thereof - Google Patents
Oil-absorbing water-repellent diatomite filter aid and preparation method and application method thereof Download PDFInfo
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- CN113058568A CN113058568A CN202110266458.1A CN202110266458A CN113058568A CN 113058568 A CN113058568 A CN 113058568A CN 202110266458 A CN202110266458 A CN 202110266458A CN 113058568 A CN113058568 A CN 113058568A
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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
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
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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
- B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/32—Hydrocarbons, e.g. oil
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/204—Keeping clear the surface of open water from oil spills
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- Chemical Kinetics & Catalysis (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses an oil-absorbing and water-repellent diatomite filter aid which comprises the following components in parts by weight: 60-80 parts of diatomite, 5-20 parts of white oil and 5-20 parts of EVA; the total weight of the diatomite, the white oil and the EVA is 100 parts. The invention also discloses a preparation method and an application method of the oil-absorbing and water-repellent diatomite filter aid. The oil-absorbing water-repellent diatomite filter aid can float in water without sinking, is not dispersed after being soaked for a long time, and can be directly thrown into a medium to be treated to adsorb impurities such as oil stains and the like in the medium to be treated. The filter aid is particularly suitable for treating port sewage with low oil content.
Description
Technical Field
The invention relates to the technical field of water treatment auxiliary agents, and particularly relates to an oil-absorbing and water-repellent diatomite filter aid and a preparation method and an application method thereof.
Background
Diatomite is a nonmetallic mineral substance, is siliceous biological sedimentary rock mainly composed of remains of unicellular algae, has the excellent characteristics of high porosity, large specific surface area, strong adsorbability and the like, and is widely applied to the industries of beverages, wine brewing, water treatment and the like. In conventional applications, diatomaceous earth is generally loaded as a filler in a filter device, and further, sewage to be treated and the like is filtered, and after the diatomaceous earth filler is blocked, the diatomaceous earth is replaced. Such fillers tend to have lower requirements for the strength of the filler particles and higher requirements for their porosity.
On the other hand, in various ports, some oily sewage is generated, which is mainly derived from ballast water, tank washing water, bottom water, oily waste water generated in an accident, and the like. The oily sewage is widely distributed, and the common method is to collect the seawater containing the oily sewage integrally and then carry out water treatment, and the method needs to consume a large amount of energy. Therefore, a simple and direct processing method is needed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an oil-absorbing and water-repellent diatomite filter aid which can effectively remove port sump oil, can be directly thrown into port sump water and is simple to operate.
The invention also aims to solve the technical problem of providing a preparation method of the oil-absorbing and water-repellent diatomite filter aid.
The invention also aims to solve the technical problem of providing an application method of the oil-absorbing and water-repellent diatomite filter aid.
In order to solve the technical problems, the invention provides an oil-absorbing and water-repellent diatomite filter aid which comprises the following components in parts by weight:
60-80 parts of diatomite, 5-20 parts of white oil and 5-20 parts of EVA;
the total weight of the diatomite, the white oil and the EVA is 100 parts.
As an improvement of the technical scheme, the particle size of the diatomite is 20-40 meshes, and the bulk density is 0.5-0.8 g/mL.
As an improvement of the technical scheme, the white oil is No. 15 white oil or No. 32 white oil.
As an improvement of the technical scheme, the content of the vinyl acetate in the EVA is 35-43 wt%, and the softening temperature is 100-130 ℃.
As an improvement of the technical proposal, SiO in the diatomite2Content 45-70 wt%, RO and R2The total content of O is 3.0-4.5 wt%.
As an improvement of the technical proposal, SiO in the diatomite250-55 wt%, RO 1.0-1.5 wt%, R2The content of O is 2.2-2.5 wt%
Correspondingly, the invention also provides a preparation method of the oil-absorbing and water-repellent diatomite filter aid, which comprises the following steps:
(1) calcining the diatomite at 900-1200 ℃ to obtain calcined diatomite;
(2) and uniformly mixing the calcined diatomite, the white oil and the EVA to obtain the finished product of the oil-absorbing and water-repellent diatomite filter aid.
As an improvement of the technical scheme, the step (2) comprises the following steps:
(1) mixing EVA and white oil, and heating to 160 ℃ while stirring to obtain a first mixture;
(2) and heating the calcined diatomite to the temperature of 100-130 ℃, then adding the calcined diatomite into the first mixture, stirring and mixing for 0.5-1h, and reducing the temperature to the normal temperature to obtain the finished product of the oil-absorbing and water-repellent diatomite filter aid.
Correspondingly, the invention also provides an application method of the oil-absorbing and water-repellent diatomite filter aid, which comprises the steps of directly throwing the oil-absorbing and water-repellent diatomite filter aid into a medium to be treated, and removing the oil-absorbing and water-repellent diatomite filter aid after absorbing for a preset time.
As an improvement of the technical scheme, the medium to be treated is port oily sewage, and the oil content of the port oily sewage is less than or equal to 50000 ppm.
The implementation of the invention has the following beneficial effects:
the oil-absorbing and water-repellent diatomite filter aid is prepared by adopting diatomite, white oil and EVA as raw materials, can float in water without sinking, is not dispersed after being soaked for a long time, can be directly thrown into a medium to be treated, and can adsorb impurities such as oil stains and the like in the medium to be treated. The filter aid is particularly suitable for treating port sewage with low oil content.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to specific embodiments.
The invention provides an oil-absorbing and water-repellent diatomite filter aid which is prepared from the following raw materials in parts by weight:
60-80 parts of diatomite, 5-20 parts of white oil and 5-20 parts of EVA;
the diatomite is a main adsorption medium, has high porosity and can effectively adsorb various impurities in the medium to be treated. The diatomite in the invention is calcined diatomite, and the permeability of the diatomite can be improved by calcining.
The particle size of the diatomite is 20-40 meshes, and when the particle size is smaller than 40 meshes, the specific surface area of the diatomite is too large, so that the diatomite is easy to adsorb water and sink in water; when the particle size is larger than 20 meshes, the specific surface area is small, and oil stains are difficult to be effectively adsorbed. The diatomaceous earth may have a particle size of 20 to 25 mesh, 25 to 30 mesh, 25 to 32 mesh, 32 to 38 mesh, for example, but not limited thereto. The diatomaceous earth may have a bulk density of 0.5 to 0.8g/mL, and may be exemplified by 0.5g/mL, 0.6g/mL, and 0.8g/mL, but is not limited thereto.
Specifically, in the diatomaceous earth of the present invention, SiO2The content is 45-70 wt%; SiO in diatomite2The higher the content is, the higher the purity is, the higher the porosity is, the stronger the adsorptivity is, the more the amount of the agent required for modification is, and the higher the modification difficulty is. But when SiO2When the content is less than 45 wt%, the content of impurities in the diatomaceous earth is excessive, and the adsorbability is poor. Exemplary, SiO2The content of (B) is 45 wt%, 48 wt%, 52 wt%, 54 wt%, 65 wt%, 75 wt%, but not limited thereto. Preferably, SiO2The content is 50-55 wt%, and the diatomite can be combined with each other in a small range during roasting to form integral particles with relatively high strength and can not be rapidly decomposed after soaking in water.
Specifically, in the present invention, the diatomaceous earth contains an alkali earth metal oxide RO (e.g., CaO, MgO, etc.) and an alkali metal oxide R2O (such as K)2O、Na2O, etc.) in the amount of 3 to 4.5 wt%. The alkaline earth metal and the alkali metal mainly play a role of fluxing, so that the diatomite is combined in a small range in the calcining process to form integral particles with relatively large strength. Preferably, in the diatomaceous earth of the present invention, the content of the alkaline earth metal oxide RO is1 to 1.5 wt%, illustratively 1.1 wt%, 1.3 wt%, 1.4 wt%, but not limited thereto. Alkali metal oxide R2The content of O is 2.2 to 2.5 wt%, and exemplary is 2.2 wt%, 2.3 wt%, 2.4 wt%, but not limited thereto. If the content of RO is more than 1.5 wt%, the diatomite particles are easy to adhere to each other in the calcining process, the porosity of the filter aid is greatly reduced, the adsorption performance of the filter aid is weakened, the oil absorption is reduced, and if the content of RO is less than 1 wt%, the strength of the filter aid is poor and the filter aid is easy to decompose when meeting water.
Specifically, in the present invention, the diatomaceous earth is used in an amount of 60 to 80 parts, illustratively 62 parts, 65 parts, 70 parts, 74 parts, 78 parts, 80 parts, but is not limited thereto. Preferably, the amount of diatomaceous earth is 70 to 80 parts.
The EVA (ethylene-vinyl acetate copolymer) has the advantages of no water absorption and good water resistance, and can resist seawater corrosion; according to the invention, EVA is combined on the surface of calcined diatomite particles through a specific mixing process, so that the filter aid has a water-repellent function, is not dispersed in seawater, and provides good conditions for the filter aid to fully disperse and absorb oil stains in seawater.
Specifically, the EVA in the invention has the vinyl acetate content of 35-43 wt%, the softening point of the EVA is relatively low (100-. Illustratively, the content of vinyl acetate in EVA is 35 wt%, 37 wt%, 38 wt%, 41 wt%, but is not limited thereto.
Specifically, in the present invention, the EVA is used in an amount of 5 to 20 parts, illustratively 5 parts, 7 parts, 11 parts, 14 parts, 18 parts, 20 parts, but is not limited thereto. Preferably, the EVA is used in an amount of 5 to 10 parts.
Wherein, the white oil refers to a mixture of liquid hydrocarbons obtained after petroleum refining, which can enhance the adsorption performance of the diatomite filter aid. Preferably, No. 15 white oil or No. 32 white oil is selected; more preferably, No. 15 white oil is selected.
Specifically, in the present invention, the white oil is used in an amount of 5 to 20 parts, illustratively 5 parts, 8 parts, 11 parts, 15 parts, 18 parts, 20 parts, but is not limited thereto.
The diatomite filter aid formulation of the present invention may further comprise some conventional additives, such as surfactants, but not limited thereto. Preferably, the diatomite filter aid in the present invention consists of only diatomite (calcined), EVA and white oil.
Correspondingly, the invention also discloses a preparation method of the oil-absorbing and water-repellent diatomite filter aid, which comprises the following steps:
s1: calcining the diatomite at 900-1200 ℃ to obtain calcined diatomite;
specifically, the calcination temperature may be 900 ℃, 950 ℃, 1000 ℃, 1100 ℃, but is not limited thereto. Preferably, the calcination temperature is 1000-1100 ℃.
S2: and uniformly mixing the calcined diatomite, the white oil and the EVA to obtain the finished product of the oil-absorbing and water-repellent diatomite filter aid.
Specifically, step S2 includes:
s21: mixing EVA and white oil, and heating to 160 ℃ while stirring to obtain a first mixture;
by heating the EVA and the white oil, the viscosity of the EVA and the white oil can be reduced, and the EVA and the white oil can be conveniently mixed with calcined diatomite. Specifically, the heating temperature may be 125 ℃, 130 ℃, 140 ℃, 150 ℃, but is not limited thereto.
S22: and heating the calcined diatomite to the temperature of 100-130 ℃, then adding the calcined diatomite into the first mixture, stirring and mixing for 0.5-1h, and reducing the temperature to the normal temperature to obtain the finished product of the oil-absorbing and water-repellent diatomite filter aid.
Correspondingly, the invention also discloses a practical method of the oil-absorbing and water-repellent diatomite filter aid, which comprises the following steps: the oil-absorbing water-repellent diatomite filter aid is directly thrown into a medium to be treated, and is directly collected and removed after being absorbed for a preset time, and the diatomite filter aid is easy to remove because the diatomite filter aid floats on the water surface and is 20-40 meshes of particles. Preferably, the medium to be treated in the invention is port oily sewage, the oil content of which is less than or equal to 50000ppm, the oily sewage has low oil content, the conventional method has high treatment difficulty and high treatment cost; the diatomite filter aid can be quickly and effectively removed, and the treatment cost is greatly reduced.
The invention is illustrated below in specific examples:
example 1
This example provides an oil-absorbing and water-repellent diatomaceous earth filter aid, which has the following formulation:
60 parts of diatomite, 20 parts of white oil and 20 parts of EVA;
wherein the diatomite has a particle size of 20-30 meshes and SiO285 wt%, CaO 2.1 wt%, MgO 0.4 wt%, and K2O content 1.3 wt%, Na2The O content is 0.2 wt%;
the white oil is No. 25 white oil, and the content of vinyl acetate in the EVA is 35 wt%;
the preparation method comprises the following steps:
(1) calcining diatomite at 1200 ℃ to obtain calcined diatomite;
(2) and uniformly mixing the calcined diatomite, the white oil and the EVA to obtain the finished product of the oil-absorbing and water-repellent diatomite filter aid.
Example 2
This example provides an oil-absorbing and water-repellent diatomaceous earth filter aid, which has the following formulation:
72 parts of diatomite, 12 parts of white oil and 16 parts of EVA;
wherein the diatomite has a particle size of 25-30 meshes and SiO268.65 wt%, CaO 0.46 wt%, MgO 0.9 wt%, and K2O content 2.25 wt%, Na2The O content is 0.52 wt%;
the white oil is No. 32 white oil, and the content of vinyl acetate in the EVA is 40 wt%;
the preparation method comprises the following steps:
(1) calcining diatomite at 1000 ℃ to obtain calcined diatomite;
(2) mixing EVA and white oil, and heating to 140 ℃ while stirring to obtain a first mixture;
(3) and heating the calcined diatomite to 100 ℃, then adding the calcined diatomite into the first mixture, stirring and mixing for 1h, and reducing to normal temperature to obtain a finished product of the oil-absorbing and water-repellent diatomite filter aid.
Example 3
This example provides an oil-absorbing and water-repellent diatomaceous earth filter aid, which has the following formulation:
68 parts of diatomite, 16 parts of white oil and 16 parts of EVA;
wherein the diatomite has a particle size of 30-35 meshes and SiO268.65 wt%, CaO 0.46 wt%, MgO 0.9 wt%, and K2O content 2.25 wt%, Na2The O content is 0.52 wt%;
the white oil is No. 32 white oil, and the content of vinyl acetate in the EVA is 40 wt%;
the preparation method comprises the following steps:
(1) calcining diatomite at 1000 ℃ to obtain calcined diatomite;
(2) mixing EVA and white oil, and heating to 140 ℃ while stirring to obtain a first mixture;
(3) and heating the calcined diatomite to 100 ℃, then adding the calcined diatomite into the first mixture, stirring and mixing for 1h, and reducing to normal temperature to obtain a finished product of the oil-absorbing and water-repellent diatomite filter aid.
Example 4
This example provides an oil-absorbing and water-repellent diatomaceous earth filter aid, which has the following formulation:
72 parts of diatomite, 12 parts of white oil and 16 parts of EVA;
wherein the diatomite has a particle size of 25-30 meshes and SiO252.42 wt%, CaO 0.32 wt%, MgO 0.76 wt%, and K2O content 1.71 wt%, Na2The O content is 0.33 wt%;
the white oil is No. 15 white oil, and the content of vinyl acetate in the EVA is 41 wt%;
the preparation method comprises the following steps:
(1) calcining diatomite at 1000 ℃ to obtain calcined diatomite;
(2) mixing EVA and white oil, and heating to 130 ℃ while stirring to obtain a first mixture;
(3) and heating the calcined diatomite to 110 ℃, then adding the calcined diatomite into the first mixture, stirring and mixing for 0.8h, and reducing the temperature to normal temperature to obtain a finished product of the oil-absorbing and water-repellent diatomite filter aid.
Comparative example 1
This comparative example provides a diatomaceous earth filter aid which differs from example 4 in that the diatomaceous earth is not calcined.
Comparative example 2
This comparative example provides a diatomaceous earth filter aid obtained by calcining 25-30 mesh diatomaceous earth at 1000 ℃.
Comparative example 3
This comparative example provides a diatomaceous earth filter aid having the following formulation:
55 parts of diatomite, 20 parts of No. 15 white oil and 25 parts of EVA;
comparative example 4
This comparative example provides a diatomaceous earth filter aid which differs from that of example 4 in that the diatomaceous earth has a particle size of 10 to 20 mesh and is SiO2The content was 94 wt%, RO + R2The O content was 1.8 wt%.
The filter aids of examples 1 to 4, comparative examples 1 to 4 were tested in the following manner:
1. seawater immersion test, ASTM D1141: 1998. 100g of filter aid product is soaked in 1L of artificial seawater for 5 days, and the suspension and rupture conditions of the filter aid product are observed every day. And (5) airing after soaking, screening by using a 40-mesh sieve, and calculating the sieve allowance.
2. Water absorption test: taking a proper amount of filter aid (determined according to the size of a Buchner funnel), placing the filter aid on filter paper, placing the filter paper in the Buchner funnel, then pouring a proper amount (2-5L) of artificial seawater into the Buchner funnel, and carrying out vacuum filtration until all the filter aid is filtered to be dry; and weighing the mass of the filter cake, and calculating the water absorption.
3. Oil absorption test: reference is made to the method of GB/T3780.2.
The specific test results are shown in the following table:
the experimental data show that the diatomite filter aid can stably exist in the seawater environment for a long time, and keeps relatively reasonable absorption capacity for seawater oil stains, so that the effect of efficiently purifying port sewage is achieved.
As can be seen from the comparison of example 4 with comparative example 1, if the preparation process of the present invention is changed, it is difficult to stably exist the filter aid in the sea water environment for a long period of time, and it is difficult to achieve the effect of efficiently purifying the harbor sewage.
As can be seen from the comparison of example 4 with comparative examples 2 to 4, if the proportions, chemical compositions or particle sizes of the respective raw materials in the present invention are changed, the diatomite filter aid has poor performance and is difficult to effectively purify port sewage.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. The oil-absorbing and water-repellent diatomite filter aid is characterized by comprising the following components in parts by weight:
60-80 parts of diatomite, 5-20 parts of white oil and 5-20 parts of EVA;
the total weight of the diatomite, the white oil and the EVA is 100 parts.
2. The oil absorbing water repellent diatomaceous earth filter aid of claim 1, wherein the diatomaceous earth has a particle size of 20 to 40 mesh and a bulk density of 0.5 to 0.8 g/mL.
3. The oil absorbing water repellent diatomaceous earth filter aid of claim 1, wherein the white oil is No. 15 white oil or No. 32 white oil.
4. The oil absorbing and water repellent diatomaceous earth filter aid of claim 1, wherein the EVA has a vinyl acetate content of 35-43 wt%, and a softening temperature of 100-130 ℃.
5. Such as rightThe oil-absorbing water-repellent diatomaceous earth filter aid of claim 1, wherein SiO in the diatomaceous earth2Content 45-70 wt%, RO and R2The total content of O is 3.0-4.5 wt%.
6. The oil-absorbing water-repellent diatomaceous earth filter aid of claim 1 or 4, wherein SiO in the diatomaceous earth is250-55 wt%, RO 1.0-1.5 wt%, R2The O content is 2.2-2.5 wt%.
7. The method for preparing the oil-absorbing water-repellent diatomaceous earth filter aid of any one of claims 1 to 6, comprising:
(1) calcining the diatomite at 900-1200 ℃ to obtain calcined diatomite;
(2) and uniformly mixing the calcined diatomite, the white oil and the EVA to obtain the composite material.
8. The method for preparing the oil-absorbing water-repellent diatomaceous earth filter aid of claim 7, wherein the step (2) comprises:
(1) mixing EVA and white oil, and heating to 160 ℃ while stirring to obtain a first mixture;
(2) and heating the calcined diatomite to the temperature of 100-130 ℃, then adding the calcined diatomite into the first mixture, stirring and mixing for 0.5-1h, and reducing the temperature to the normal temperature to obtain the finished product of the oil-absorbing and water-repellent diatomite filter aid.
9. The method for using the oil-absorbing water-repellent diatomaceous earth filter aid of any one of claims 1 to 6, wherein the oil-absorbing water-repellent diatomaceous earth filter aid is directly thrown into a medium to be treated, and is removed after absorption for a predetermined time.
10. The method for applying the oil-absorbing and water-repellent diatomite filter aid according to claim 9, wherein the medium to be treated is port oily sewage with the oil content of 50000ppm or less.
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| US4206080A (en) * | 1977-02-17 | 1980-06-03 | Mitsubishi Rayon Company, Limited | Method of producing of treating material for oil-containing waste water |
| CN1053562A (en) * | 1991-03-12 | 1991-08-07 | 天津大学 | Absorbent-type filter aid made up of diatomite |
| US20050104028A1 (en) * | 2002-04-08 | 2005-05-19 | Robinson Charles D. | Oil recovery and environmental cleanup compositions |
| CN1658969A (en) * | 2002-04-08 | 2005-08-24 | 戴维·C·鲁滨逊 | Oil recovery and environmental cleanup compositions |
| CN102335587A (en) * | 2010-07-21 | 2012-02-01 | 姜玉芝 | Preparation method of diatomite adsorbent and product |
| CN103770421A (en) * | 2014-02-18 | 2014-05-07 | 惠州湖工成松防水技术研发有限公司 | Waterproof material |
| CN110372412A (en) * | 2019-08-28 | 2019-10-25 | 邱连旺 | A kind of diatomite functional material and preparation method thereof |
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