CN107899302B - Sepiolite filter core - Google Patents
Sepiolite filter core Download PDFInfo
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- CN107899302B CN107899302B CN201711134849.8A CN201711134849A CN107899302B CN 107899302 B CN107899302 B CN 107899302B CN 201711134849 A CN201711134849 A CN 201711134849A CN 107899302 B CN107899302 B CN 107899302B
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2068—Other inorganic materials, e.g. ceramics
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Abstract
The invention discloses a sepiolite filter element, which relates to the technical field of filter materials and is prepared from the following components: the coating comprises silicotungstic acid modified sepiolite, sodium silicate, diatom ooze, attapulgite, carbide slag, graphene and a coupling agent; the modified sepiolite has the advantages of low price, large specific surface area, high material strength, good stability, difficult corrosion and the like, and has a plurality of acidic and alkaline centers, so that a complex can be activated after reactant molecules are adsorbed, the reaction is promoted, most importantly, the silicotungstic acid modified sepiolite is synergistic with other components, the adsorption effect of the prepared filter element can be obviously improved, and the particle size range of the filter element to be adsorbed is expanded.
Description
Technical Field
The invention belongs to the technical field of filter materials, and particularly relates to a sepiolite filter element.
Background
The filtering material has wide application, and can be widely applied to the industries of chemical industry, electric power, metallurgy, petroleum, electronic and electric appliances, machinery and the like; the most common air filter for automobiles is used for filtering air entering an engine, blocking mechanical impurity components such as particles and particles in the air, preventing the components from entering gasoline, diesel oil or engine oil and ensuring the normal work of the engine. A large amount of filter materials are used for an air conditioning system, the pollution to the environment and the atmosphere is serious at present, the human health is greatly harmed, the air filter materials can adsorb various harmful particles in the air, the air is prevented from entering the life or working environment of people, the suction of harmful substances such as particles in the lung of the human body is reduced, the life quality of the people is improved, and the occurrence of diseases is reduced. And the other part is used for water filtration and sewage treatment and is used for separating heavy metals or harmful components in water. The existing filter materials mainly comprise honeycomb ceramics, filter paper, a steel wire mesh and the like. The existing honeycomb ceramic filter material has single raw material preparation function and can not meet the requirement of continuous development of the technology.
Disclosure of Invention
The invention aims to provide a sepiolite filter element aiming at the existing problems.
The invention is realized by the following technical scheme:
the sepiolite filter element is prepared from the following components in parts by weight: 150 parts of silicotungstic acid modified sepiolite 120-one, 15-18 parts of sodium silicate, 5-10 parts of diatom ooze, 30-40 parts of attapulgite, 2-5 parts of carbide slag, 1-3 parts of graphene and 0.3-0.8 part of coupling agent.
Further, the preparation method of the silicotungstic acid modified sepiolite comprises the following steps:
(1) crushing sepiolite to 150 meshes, adding into a resistance furnace, calcining at 550 ℃ for 40min, and cooling to room temperature;
(2) preparing an activating agent aqueous solution with a certain concentration, adding the sepiolite powder treated in the step (1) under constant-temperature stirring, and controlling the solid-to-liquid ratio to be 1: 20, stirring at the rotating speed of 800r/min for 50min to obtain sepiolite powder suspension, placing the sepiolite powder suspension in ultrasonic waves for 35min, then heating to 80 ℃, and preserving heat for 2 hours to obtain activated sepiolite powder suspension; the activator aqueous solution is prepared from the following components in parts by weight: 4.5 parts of silicotungstic acid, 1.2 parts of nitric acid, 5 parts of glyceryl tristearate and 80 parts of deionized water;
(3) adding ammonia water into the sepiolite powder suspension obtained in the step (2), adjusting the pH value of the sepiolite powder suspension to 8.0, heating to 88 ℃, stirring for 1.5h, filtering, and drying to obtain a modified sepiolite powder semi-finished product;
(4) extruding the semi-finished product of the modified sepiolite powder into slices by an extruder, controlling the thickness of the semi-finished product to be 0.1mm, fully mixing the extruded sepiolite with ethanol according to the weight ratio of 1: 3, adding nano alumina with the sepiolite mass of 2%, grinding for 2 hours, and then carrying out rotary evaporation drying to obtain the modified sepiolite powder.
Further, the cooling mode in the step (1) is furnace cooling.
Further, the constant-temperature stirring in the step (2) is stirring at the rotating speed of 800r/min at the temperature of 65 ℃.
Further, the ultrasonic power in the step (2) is 1000W.
Further, the mass concentration of ammonia water in the step (3) is 12.5%.
Further, the diatom ooze has a porosity of 95% and a specific surface area of 65 square meters per gram.
Furthermore, the particle sizes of the attapulgite and the carbide slag are 150 meshes, and the coupling agent is an organic silane coupling agent.
Further, the preparation method of the sepiolite filter element comprises the following steps: uniformly mixing silicotungstic acid modified sepiolite, sodium silicate, diatom ooze, attapulgite, carbide slag, graphene and a coupling agent according to a ratio, heating to 100 ℃, preserving heat for 2 hours, then continuously heating to 250 ℃, sintering for 1.5 hours, and naturally cooling to room temperature to obtain the product.
Compared with the prior art, the invention has the following advantages: the modified sepiolite has the advantages of low price, large specific surface area, high material strength, good stability, difficulty in corrosion and the like, and has a plurality of acidic and alkaline centers, so that a complex can be activated after reactant molecules are adsorbed, the reaction is promoted, most importantly, the silicotungstic acid modified sepiolite is synergistic with other components, the adsorption effect of the prepared filter element can be remarkably improved, and the particle size range of the filter element to be adsorbed is expanded; in addition, the silicotungstic acid modified sepiolite has an excellent pore channel structure, so that the filter core has good surface charge effect and pore channel effect, and simultaneously has good physical and chemical functions such as adsorption, filtration, carrier function and ion exchange, and the prepared filter core can be applied to a wider range.
Detailed Description
Example 1
The sepiolite filter element is prepared from the following components in parts by weight: 120 parts of silicotungstic acid modified sepiolite, 15 parts of sodium silicate, 5 parts of diatom ooze, 30 parts of attapulgite, 2 parts of carbide slag, 1 part of graphene and 0.3 part of coupling agent.
Further, the preparation method of the silicotungstic acid modified sepiolite comprises the following steps:
(1) crushing sepiolite to 150 meshes, adding into a resistance furnace, calcining at 550 ℃ for 40min, and cooling to room temperature;
(2) preparing an activating agent aqueous solution with a certain concentration, adding the sepiolite powder treated in the step (1) under constant-temperature stirring, and controlling the solid-to-liquid ratio to be 1: 20, stirring at the rotating speed of 800r/min for 50min to obtain sepiolite powder suspension, placing the sepiolite powder suspension in ultrasonic waves for 35min, then heating to 80 ℃, and preserving heat for 2 hours to obtain activated sepiolite powder suspension; the activator aqueous solution is prepared from the following components in parts by weight: 4.5 parts of silicotungstic acid, 1.2 parts of nitric acid, 5 parts of glyceryl tristearate and 80 parts of deionized water;
(3) adding ammonia water into the sepiolite powder suspension obtained in the step (2), adjusting the pH value of the sepiolite powder suspension to 8.0, heating to 88 ℃, stirring for 1.5h, filtering, and drying to obtain a modified sepiolite powder semi-finished product;
(4) extruding the semi-finished product of the modified sepiolite powder into slices by an extruder, controlling the thickness of the semi-finished product to be 0.1mm, fully mixing the extruded sepiolite with ethanol according to the weight ratio of 1: 3, adding nano alumina with the sepiolite mass of 2%, grinding for 2 hours, and then carrying out rotary evaporation drying to obtain the modified sepiolite powder.
Further, the cooling mode in the step (1) is furnace cooling.
Further, the constant-temperature stirring in the step (2) is stirring at the rotating speed of 800r/min at the temperature of 65 ℃.
Further, the ultrasonic power in the step (2) is 1000W.
Further, the mass concentration of ammonia water in the step (3) is 12.5%.
Further, the diatom ooze has a porosity of 95% and a specific surface area of 65 square meters per gram.
Furthermore, the particle sizes of the attapulgite and the carbide slag are 150 meshes, and the coupling agent is an organic silane coupling agent.
Further, the preparation method of the sepiolite filter element comprises the following steps: uniformly mixing silicotungstic acid modified sepiolite, sodium silicate, diatom ooze, attapulgite, carbide slag, graphene and a coupling agent according to a ratio, heating to 100 ℃, preserving heat for 2 hours, then continuously heating to 250 ℃, sintering for 1.5 hours, and naturally cooling to room temperature to obtain the product.
Example 2
The sepiolite filter element is prepared from the following components in parts by weight: 150 parts of silicotungstic acid modified sepiolite, 18 parts of sodium silicate, 10 parts of diatom ooze, 40 parts of attapulgite, 5 parts of carbide slag, 3 parts of graphene and 0.8 part of coupling agent.
Further, the preparation method of the silicotungstic acid modified sepiolite comprises the following steps:
(1) crushing sepiolite to 150 meshes, adding into a resistance furnace, calcining at 550 ℃ for 40min, and cooling to room temperature;
(2) preparing an activating agent aqueous solution with a certain concentration, adding the sepiolite powder treated in the step (1) under constant-temperature stirring, and controlling the solid-to-liquid ratio to be 1: 20, stirring at the rotating speed of 800r/min for 50min to obtain sepiolite powder suspension, placing the sepiolite powder suspension in ultrasonic waves for 35min, then heating to 80 ℃, and preserving heat for 2 hours to obtain activated sepiolite powder suspension; the activator aqueous solution is prepared from the following components in parts by weight: 4.5 parts of silicotungstic acid, 1.2 parts of nitric acid, 5 parts of glyceryl tristearate and 80 parts of deionized water;
(3) adding ammonia water into the sepiolite powder suspension obtained in the step (2), adjusting the pH value of the sepiolite powder suspension to 8.0, heating to 88 ℃, stirring for 1.5h, filtering, and drying to obtain a modified sepiolite powder semi-finished product;
(4) extruding the semi-finished product of the modified sepiolite powder into slices by an extruder, controlling the thickness of the semi-finished product to be 0.1mm, fully mixing the extruded sepiolite with ethanol according to the weight ratio of 1: 3, adding nano alumina with the sepiolite mass of 2%, grinding for 2 hours, and then carrying out rotary evaporation drying to obtain the modified sepiolite powder.
Further, the cooling mode in the step (1) is furnace cooling.
Further, the constant-temperature stirring in the step (2) is stirring at the rotating speed of 800r/min at the temperature of 65 ℃.
Further, the ultrasonic power in the step (2) is 1000W.
Further, the mass concentration of ammonia water in the step (3) is 12.5%.
Further, the diatom ooze has a porosity of 95% and a specific surface area of 65 square meters per gram.
Furthermore, the particle sizes of the attapulgite and the carbide slag are 150 meshes, and the coupling agent is an organic silane coupling agent.
Further, the preparation method of the sepiolite filter element comprises the following steps: uniformly mixing silicotungstic acid modified sepiolite, sodium silicate, diatom ooze, attapulgite, carbide slag, graphene and a coupling agent according to a ratio, heating to 100 ℃, preserving heat for 2 hours, then continuously heating to 250 ℃, sintering for 1.5 hours, and naturally cooling to room temperature to obtain the product.
Example 3
The sepiolite filter element is prepared from the following components in parts by weight: 130 parts of silicotungstic acid modified sepiolite, 16 parts of sodium silicate, 8 parts of diatom ooze, 32 parts of attapulgite, 3 parts of carbide slag, 2 parts of graphene and 0.5 part of coupling agent.
Further, the preparation method of the silicotungstic acid modified sepiolite comprises the following steps:
(1) crushing sepiolite to 150 meshes, adding into a resistance furnace, calcining at 550 ℃ for 40min, and cooling to room temperature;
(2) preparing an activating agent aqueous solution with a certain concentration, adding the sepiolite powder treated in the step (1) under constant-temperature stirring, and controlling the solid-to-liquid ratio to be 1: 20, stirring at the rotating speed of 800r/min for 50min to obtain sepiolite powder suspension, placing the sepiolite powder suspension in ultrasonic waves for 35min, then heating to 80 ℃, and preserving heat for 2 hours to obtain activated sepiolite powder suspension; the activator aqueous solution is prepared from the following components in parts by weight: 4.5 parts of silicotungstic acid, 1.2 parts of nitric acid, 5 parts of glyceryl tristearate and 80 parts of deionized water;
(3) adding ammonia water into the sepiolite powder suspension obtained in the step (2), adjusting the pH value of the sepiolite powder suspension to 8.0, heating to 88 ℃, stirring for 1.5h, filtering, and drying to obtain a modified sepiolite powder semi-finished product;
(4) extruding the semi-finished product of the modified sepiolite powder into slices by an extruder, controlling the thickness of the semi-finished product to be 0.1mm, fully mixing the extruded sepiolite with ethanol according to the weight ratio of 1: 3, adding nano alumina with the sepiolite mass of 2%, grinding for 2 hours, and then carrying out rotary evaporation drying to obtain the modified sepiolite powder.
Further, the cooling mode in the step (1) is furnace cooling.
Further, the constant-temperature stirring in the step (2) is stirring at the rotating speed of 800r/min at the temperature of 65 ℃.
Further, the ultrasonic power in the step (2) is 1000W.
Further, the mass concentration of ammonia water in the step (3) is 12.5%.
Further, the diatom ooze has a porosity of 95% and a specific surface area of 65 square meters per gram.
Furthermore, the particle sizes of the attapulgite and the carbide slag are 150 meshes, and the coupling agent is an organic silane coupling agent.
Further, the preparation method of the sepiolite filter element comprises the following steps: uniformly mixing silicotungstic acid modified sepiolite, sodium silicate, diatom ooze, attapulgite, carbide slag, graphene and a coupling agent according to a ratio, heating to 100 ℃, preserving heat for 2 hours, then continuously heating to 250 ℃, sintering for 1.5 hours, and naturally cooling to room temperature to obtain the product.
Comparative example 1: the only difference from example 1 is that the silicotungstic acid modified sepiolite was replaced with ordinary sepiolite.
Comparative example 2: only the difference from example 1 is that no graphene is added.
And (3) testing:
the performance of the sepiolite powder filter cores prepared in the examples and the comparative examples is tested;
TABLE 1
| Resistance to thermal shock | Air-cooling once at-25 deg.C | Maximum use temperature C | Capture dust particle minimum particle size range mum | |
| Example 1 | 155 | Without cracking | 130 | 0.5-15 |
| Example 2 | 156 | Without cracking | 130 | 0.5-15 |
| Example 3 | 158 | Without cracking | 130 | 0.5-15 |
| Comparative example 1 | 130 | Fracture of | 115 | 5-10 |
| Comparative example 2 | 150 | Without cracking | 125 | 0.8-12 |
As can be seen from the table 1, the sepiolite filter element prepared by the invention has good comprehensive performance.
Claims (1)
1. The sepiolite filter element is characterized by being prepared from the following components in parts by weight: 150 parts of silicotungstic acid modified sepiolite 120-one, 15-18 parts of sodium silicate, 5-10 parts of diatom ooze, 30-40 parts of attapulgite, 2-5 parts of carbide slag, 1-3 parts of graphene and 0.3-0.8 part of coupling agent; the preparation method of the silicotungstic acid modified sepiolite comprises the following steps: (1) crushing sepiolite to 150 meshes, adding into a resistance furnace, calcining at 550 ℃ for 40min, and cooling to room temperature; (2) preparing an activating agent aqueous solution with a certain concentration, adding the sepiolite powder treated in the step (1) under constant-temperature stirring, and controlling the solid-to-liquid ratio to be 1: 20, stirring at the rotating speed of 800r/min for 50min to obtain sepiolite powder suspension, placing the sepiolite powder suspension in ultrasonic waves for 35min, then heating to 80 ℃, and preserving heat for 2 hours to obtain activated sepiolite powder suspension; the activator aqueous solution is prepared from the following components in parts by weight: 4.5 parts of silicotungstic acid, 1.2 parts of nitric acid, 5 parts of glyceryl tristearate and 80 parts of deionized water; (3) adding ammonia water into the sepiolite powder suspension obtained in the step (2), adjusting the pH value of the sepiolite powder suspension to 8.0, heating to 88 ℃, stirring for 1.5h, filtering, and drying to obtain a modified sepiolite powder semi-finished product; (4) extruding the semi-finished product of the modified sepiolite powder into slices by an extruder, controlling the thickness of the semi-finished product to be 0.1mm, fully mixing the extruded sepiolite with ethanol according to the weight ratio of 1: 3, adding nano alumina with the mass of 2 percent of the sepiolite, grinding for 2 hours, and then carrying out rotary evaporation drying to obtain the modified sepiolite powder; the cooling mode in the step (1) is furnace cooling; the constant-temperature stirring in the step (2) is stirring at the rotating speed of 800r/min at the temperature of 65 ℃; the ultrasonic power in the step (2) is 1000W; the mass concentration of ammonia water in the step (3) is 12.5 percent; the porosity of the diatom ooze is 95 percent, and the specific surface area is 65 square meters per gram; the particle sizes of the attapulgite and the carbide slag are 150 meshes, and the coupling agent is an organic silane coupling agent; the preparation method of the sepiolite filter element comprises the following steps: uniformly mixing silicotungstic acid modified sepiolite, sodium silicate, diatom ooze, attapulgite, carbide slag, graphene and a coupling agent according to a ratio, heating to 100 ℃, preserving heat for 2 hours, then continuously heating to 250 ℃, sintering for 1.5 hours, and naturally cooling to room temperature to obtain the product.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103505940A (en) * | 2013-09-06 | 2014-01-15 | 安徽国电能源设备工程有限公司 | Sepiolite powder filter core and preparation method thereof |
| CN105521760A (en) * | 2015-12-01 | 2016-04-27 | 湘潭大学 | Method for modifying meerschaum with heteropoly acids and application of modified meerschaum |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103505940A (en) * | 2013-09-06 | 2014-01-15 | 安徽国电能源设备工程有限公司 | Sepiolite powder filter core and preparation method thereof |
| CN105521760A (en) * | 2015-12-01 | 2016-04-27 | 湘潭大学 | Method for modifying meerschaum with heteropoly acids and application of modified meerschaum |
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