CN114377681A - Process for preparing spherical ozone catalyst by high-temperature modified red mud - Google Patents
Process for preparing spherical ozone catalyst by high-temperature modified red mud Download PDFInfo
- Publication number
- CN114377681A CN114377681A CN202210072997.6A CN202210072997A CN114377681A CN 114377681 A CN114377681 A CN 114377681A CN 202210072997 A CN202210072997 A CN 202210072997A CN 114377681 A CN114377681 A CN 114377681A
- Authority
- CN
- China
- Prior art keywords
- red mud
- temperature
- spherical
- preparing
- catalyst
- 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.)
- Withdrawn
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 62
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- RZLVQBNCHSJZPX-UHFFFAOYSA-L zinc sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Zn+2].[O-]S([O-])(=O)=O RZLVQBNCHSJZPX-UHFFFAOYSA-L 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 239000008367 deionised water Substances 0.000 claims abstract description 6
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- 238000000227 grinding Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 230000003197 catalytic effect Effects 0.000 claims description 4
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 4
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 4
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 229940076153 heptahydrate zinc sulfate Drugs 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 239000012798 spherical particle Substances 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims 2
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 6
- 239000002351 wastewater Substances 0.000 abstract description 5
- 229910001308 Zinc ferrite Inorganic materials 0.000 abstract description 3
- 230000000593 degrading effect Effects 0.000 abstract description 3
- 230000007935 neutral effect Effects 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000005984 hydrogenation reaction Methods 0.000 description 5
- 238000004131 Bayer process Methods 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 229910001570 bauxite Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000006298 dechlorination reaction Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- NNGHIEIYUJKFQS-UHFFFAOYSA-L hydroxy(oxo)iron;zinc Chemical compound [Zn].O[Fe]=O.O[Fe]=O NNGHIEIYUJKFQS-UHFFFAOYSA-L 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000010532 solid phase synthesis reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229950011008 tetrachloroethylene Drugs 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 150000004688 heptahydrates Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000005949 ozonolysis reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/80—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with zinc, cadmium or mercury
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a process for preparing a spherical ozone catalyst by high-temperature modified red mud, which specifically comprises the following steps: s1, treating the red mud at high temperature; s2, modifying the red mud by zinc sulfate heptahydrate; s3, preparing ZnFe based on red mud2O4A photo-Fenton catalyst; s4, preparing a spherical ozone catalyst; firstly, red mud is pretreated at high temperature, the red mud is crushed and dried, the pretreated red mud and zinc sulfate heptahydrate are mixed and ground according to a certain proportion, the mixture is heated and roasted for a period of time at a certain temperature, the mixture is cooled to room temperature, the mixture is washed to be neutral by deionized water, and the mixture is dried and ground at 100 ℃ to prepare the red mud-based ZnFe2O4The catalyst has high removal rate when degrading the wastewater, and can strengthen the removal of the organic pollutants difficult to degrade in water.
Description
Technical Field
The invention belongs to the technical field of environmental management, and particularly relates to a process for preparing a spherical ozone catalyst by high-temperature modified red mud.
Background
Red mud is an industrial solid waste discharged after alumina is extracted from bauxite. Generally contains a large amount of iron oxide, and has an appearance similar to that of red soil. The bauxite has high aluminum content, aluminum is smelted by a Bayer process, and the produced red mud is called Bayer process red mud; the bauxite contains low content of aluminum, and is smelted by a sintering method or a sintering method and a Bayer process, and the produced red mud is respectively called sintering process red mud or combined process red mud.
The melting point of the red mud is about 1200 ℃, the relative density is 0.8-1.0, the red mud has stable chemical components in water medium and small particle size: 0.08-0.25 μm, has a pore frame structure, and can be used as adsorbent. The red mud contains a large amount of Fe3+、Al3+Has higher positive charge, can be used for preparing a water treatment flocculant and can effectively reduce suspended colloidal particles in water.
Due to the large chemical alkali binding of red mud, PH: 10-12, difficult to remove, high in content, and containing fluorine, aluminum and other various impurities, and the like, and the harmless utilization of the red mud is difficult to carry out. Therefore, the red mud needs to be recycled in a large quantity through multiple channels.
The application of red mud as a catalyst in the current market is as follows:
1. red mud hydrogenation catalyst
Bayer process red mud contains a large amount of ferric oxide and ferric oxide, and the red mud can be used as a hydrogenation catalyst after being directly sulfurized and activated. Dissolving red mud in a mixed solution of hydrochloric acid and phosphoric acid, boiling the mixed solution, adjusting the pH value to 7 by using ammonia water, filtering, washing, drying, calcining the obtained precipitate, and carrying out vulcanization to obtain the corresponding catalyst.
2. Red mud as catalyst for hydrogenation dechlorination of tetrachloroethylene
The utilization of the red mud as the catalyst for the hydrogenation and dechlorination has more obvious economic benefit than the common commercial catalyst. The hydrodechlorination reaction is carried out in a continuous bed fixed reactor, wherein temperature, pressure, hydrogen flow rate, whether the catalyst is sulfided and whether a liquid phase is present are all taken into account. The sulfurated red mud is used as a catalyst for hydrogenation dechlorination, the conversion rate of tetrachloroethylene is increased along with the increase of pressure and temperature, and the existence of a liquid phase does not influence the reaction.
The existing catalyst for water treatment, which is made of red mud, has weak capability of removing organic pollutants difficult to degrade in water in the using process, and has large input amount and large loss amount.
Disclosure of Invention
The invention aims to provide a process for preparing a spherical ozone catalyst by high-temperature modified red mud, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a process for preparing a spherical ozone catalyst by high-temperature modified red mud specifically comprises the following steps:
s1, high-temperature treatment of red mud: putting the red mud into a rotary oven, firstly heating the temperature of the rotary oven to 105 ℃, keeping the temperature constant for 1 hour, then heating the temperature of the rotary oven to 250 ℃, keeping the temperature constant for 2 hours, then adjusting the temperature of the rotary oven to 400-800 ℃, drying the red mud in the rotary oven at 400-800 ℃ for 1.5-2 hours, and carrying out high-temperature heat treatment on the red mud to improve the catalytic performance of the red mud, wherein the red mud is reduced at high temperature, and Fe20s is converted into Fe30 d;
s2, modifying the red mud with heptahydrate zinc sulfate: naturally cooling the red mud pretreated in the step S1, mixing the red mud with zinc sulfate heptahydrate, and grinding and sieving the mixed product to obtain mixture particle powder;
s3, preparing ZnFe based on red mud2O4photo-Fenton catalyst: roasting the mixture particle powder in the step S2 at a high temperature of 1000 ℃ for 5-7 hours, cooling to room temperature after roasting, washing to neutrality by using deionized water, drying and grinding at 100 ℃ to select particle powder of 300 meshes;
s4, preparing a spherical ozone catalyst: and (4) adding 25% of adhesive into the 300-mesh particle powder in the step S3 to prepare spherical particles with the diameter of 6mm, namely preparing the high-temperature modified red mud to prepare the spherical ozone catalyst.
Preferably, said stepsThe specific surface area of the red mud catalyst in the step S1 is about: 22.8m2/g。
Preferably, the conditions for mixing the red mud and the zinc sulfate heptahydrate in the step S2 are as follows: n isZn∶nFeIs 1: 1.
Preferably, the drying temperature of the red mud in the rotary oven in the step S1 is preferably 500 ℃, the red mud is dried at 500 ℃, the red mud is coated, the surface cannot be too smooth, and the ceramic formation is avoided.
Preferably, the binder in step S4 is a polyvinylpyrrolidone ethanol solution with a concentration of 3-5 g/mL.
Preferably, the diameter of the spherical ozone catalyst in the step S4 is 6 mm.
The invention has the technical effects and advantages that: the process for preparing the spherical ozone catalyst by using the high-temperature modified red mud comprises the steps of pretreating the red mud at high temperature, crushing and drying the red mud, mixing and grinding the pretreated red mud and zinc sulfate heptahydrate according to a certain proportion, heating and roasting at a certain temperature for a period of time, cooling to room temperature, washing to be neutral by using deionized water, drying and grinding at 100 ℃ to obtain the red mud-based ZnFe2O4 A catalyst; red mud is used as an iron source, zinc sulfate heptahydrate is used as a zinc source, and a solid-phase method is adopted to prepare ZnFe based on red mud2O4The catalyst has high removal rate when degrading the wastewater, and can strengthen the removal of the organic pollutants difficult to degrade in water.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a process for preparing a spherical ozone catalyst by high-temperature modified red mud, which is shown in figure 1 and specifically comprises the following steps:
s1, high-temperature treatment of red mud: putting the red mud into a rotary oven, firstly heating the temperature of the rotary oven to 105 ℃, keeping the temperature constant for 1 hour, then heating the temperature of the rotary oven to 250 ℃, keeping the temperature constant for 2 hours, then adjusting the temperature of the rotary oven to 400-800 ℃, drying the red mud in the rotary oven at 400-800 ℃ for 1.5-2 hours, and carrying out high-temperature heat treatment on the red mud to improve the catalytic performance of the red mud, wherein the red mud is reduced at high temperature, and Fe20s is converted into Fe30 d;
s2, modifying the red mud with heptahydrate zinc sulfate: naturally cooling the red mud pretreated in the step S1, mixing the red mud with zinc sulfate heptahydrate, and grinding and sieving the mixed product to obtain mixture particle powder;
s3, preparing ZnFe based on red mud2O4photo-Fenton catalyst: roasting the mixture particle powder in the step S2 at a high temperature of 1000 ℃ for 5-7 hours, cooling to room temperature after roasting, washing to neutrality by using deionized water, drying and grinding at 100 ℃ to select particle powder of 300 meshes;
s4, preparing a spherical ozone catalyst: and (4) adding 25% of adhesive into the 300-mesh particle powder in the step S3 to prepare spherical particles with the diameter of 6mm, namely preparing the high-temperature modified red mud to prepare the spherical ozone catalyst.
Specifically, the specific surface area of the red mud catalyst in the step S1 is about: 22.8m2And g, in the step S1, the drying temperature of the red mud in the rotary oven is preferably 500 ℃, the temperature control of the red mud is critical, the red mud with the temperature of 500 ℃ is coated with powder, the surface cannot be too smooth, the ceramic formation is avoided, after high-temperature heat treatment, the catalytic performance of the red mud is improved, the red mud is reduced at high temperature, and Fe20S is converted into Fe30 d.
Specifically, the conditions for mixing the red mud and the zinc sulfate heptahydrate in the step S2 are as follows: n isZn∶nFeIs 1: 1, when the molar ratio of zinc sulfate to iron in the red mud is 1: 1, the organic pollutants which are difficult to degrade in water can be removed in an enhanced manner.
Specifically, the adhesive in the step S4 is a polyvinylpyrrolidone ethanol solution of 3-5g/mL, and the polyvinylpyrrolidone ethanol solution has a good molding effect and a good reinforcing effect in the molding process of the spherical ozone catalyst.
Specifically, the diameter of the spherical ozone catalyst in the step S4 is 6 mm.
Specifically, when in use, the process for preparing the spherical ozone catalyst by using the high-temperature modified red mud has the following advantages:
(1) ozone is directly oxidized, is easy to volatilize and dissolve, needs a catalyst and reacts under neutral or weakly alkaline conditions. The spherical ozone catalyst is added, the original alkalinity of the red mud is large, the catalyst is added into water, and the PH value is just suitable for the reaction condition of ozone.
(2) The red mud ball catalyst strengthens the ozonolysis to generate hydroxyl radicals with strong oxidizing ability, the potential is close to F, and the strengthened removal of the organic pollutants difficult to degrade in water is completed.
(3) The ozone ball catalyst is aerated in the reaction and can automatically update and fall off, the catalyst is used as sediment for loss, no more sludge is brought out, and the loss rate is 10-15% until the loss disappears finally. The catalyst does not need to be replaced in the whole process, and only needs to be supplemented with the catalyst along with the use time.
(4) If the alkalinity of individual waste water is too large, the acid can be used for simply adjusting back, and the catalyst can be suitable for various acid-base waste water.
(5) The ozone ball catalyst finishes the reaction within 30min generally, and the contact time with sewage is greatly shortened.
(6) The concentration of the degradation-resistant pollutants in water is as follows: 1.5 mg/l.
(7) The catalyst dosage is as follows: 500 mg/l.
(8) The red mud is used as a catalyst carrier material and has the characteristics of rich pore channel structure and large specific surface area.
(9) Simple raw material source and low manufacturing cost.
(10) The catalyst has strong acid and alkali resistance.
The process for preparing the spherical ozone catalyst by using the high-temperature modified red mud comprises the steps of pretreating the red mud, crushing and drying the red mud, and mixing the pretreated red mud with heptahydrate sulfuric acidMixing and grinding zinc according to a certain proportion, heating and roasting for a period of time at a certain temperature, cooling to room temperature, washing to neutrality with deionized water, drying at 100 ℃, and grinding to obtain the red mud-based ZnFe2O4 A catalyst; red mud is used as an iron source, zinc sulfate heptahydrate is used as a zinc source, and a solid-phase method is adopted to prepare ZnFe based on red mud2O4The catalyst has high removal rate when degrading the wastewater, and can strengthen the removal of the organic pollutants difficult to degrade in water.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. A process for preparing a spherical ozone catalyst by high-temperature modified red mud is characterized by comprising the following steps: the method specifically comprises the following steps:
s1, high-temperature treatment of red mud: putting the red mud into a rotary oven, firstly heating the temperature of the rotary oven to 105 ℃, keeping the temperature constant for 1 hour, then heating the temperature of the rotary oven to 250 ℃, keeping the temperature constant for 2 hours, then adjusting the temperature of the rotary oven to 400-800 ℃, drying the red mud in the rotary oven at 400-800 ℃ for 1.5-2 hours, and carrying out high-temperature heat treatment on the red mud to improve the catalytic performance of the red mud, wherein the red mud is reduced at high temperature, and Fe20s is converted into Fe30 d;
s2, modifying the red mud with heptahydrate zinc sulfate: naturally cooling the red mud pretreated in the step S1, mixing the red mud with zinc sulfate heptahydrate, and grinding and sieving the mixed product to obtain mixture particle powder;
s3, preparing ZnFe based on red mud2O4photo-Fenton catalyst: roasting the mixture granule powder obtained in the step S2 at 1000 ℃ for 5-7 hours, and cooling after roastingCooling to room temperature, washing to neutrality with deionized water, drying at 100 deg.C, grinding, and selecting 300 mesh granule powder;
s4, preparing a spherical ozone catalyst: and (4) adding 25% of adhesive into the 300-mesh particle powder in the step S3 to prepare spherical particles with the diameter of 6mm, namely preparing the high-temperature modified red mud to prepare the spherical ozone catalyst.
2. The process for preparing the spherical ozone catalyst by using the high-temperature modified red mud as claimed in claim 1, which is characterized in that: the specific surface area of the red mud catalyst in the step S1 is about: 22.8m2/g。
3. The process for preparing the spherical ozone catalyst by using the high-temperature modified red mud as claimed in claim 1, which is characterized in that: the conditions for mixing the red mud and the zinc sulfate heptahydrate in the step S2 are as follows: n isZn∶nFeIs 1: 1.
4. The process for preparing the spherical ozone catalyst by using the high-temperature modified red mud as claimed in claim 1, which is characterized in that: in the step S1, the drying temperature of the red mud in the rotary oven is preferably 500 ℃, the red mud is dried at 500 ℃, the red mud is coated with powder, the surface of the red mud cannot be too smooth, and the ceramic formation is avoided.
5. The process for preparing the spherical ozone catalyst by using the high-temperature modified red mud as claimed in claim 1, which is characterized in that: the adhesive in the step S4 is a polyvinylpyrrolidone ethanol solution with the concentration of 3-5 g/mL.
6. The process for preparing the spherical ozone catalyst by using the high-temperature modified red mud as claimed in claim 1, which is characterized in that: the diameter of the spherical ozone catalyst in the step S4 is 6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210072997.6A CN114377681A (en) | 2022-01-21 | 2022-01-21 | Process for preparing spherical ozone catalyst by high-temperature modified red mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210072997.6A CN114377681A (en) | 2022-01-21 | 2022-01-21 | Process for preparing spherical ozone catalyst by high-temperature modified red mud |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114377681A true CN114377681A (en) | 2022-04-22 |
Family
ID=81203617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210072997.6A Withdrawn CN114377681A (en) | 2022-01-21 | 2022-01-21 | Process for preparing spherical ozone catalyst by high-temperature modified red mud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114377681A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101559353A (en) * | 2009-05-12 | 2009-10-21 | 山东大学 | Preparation method of zinc chloride modified red mud |
| CN104941572A (en) * | 2015-06-29 | 2015-09-30 | 湖南农业大学 | Red mud composite material for wastewater treatment as well as preparation method and application of red mud composite material |
| CN110496591A (en) * | 2019-08-23 | 2019-11-26 | 河南长兴实业有限公司 | A kind of red mud preparation method of extra specific surface area |
-
2022
- 2022-01-21 CN CN202210072997.6A patent/CN114377681A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101559353A (en) * | 2009-05-12 | 2009-10-21 | 山东大学 | Preparation method of zinc chloride modified red mud |
| CN104941572A (en) * | 2015-06-29 | 2015-09-30 | 湖南农业大学 | Red mud composite material for wastewater treatment as well as preparation method and application of red mud composite material |
| CN110496591A (en) * | 2019-08-23 | 2019-11-26 | 河南长兴实业有限公司 | A kind of red mud preparation method of extra specific surface area |
Non-Patent Citations (2)
| Title |
|---|
| 卢彩萍;刘璐;魏光涛;杨艳娟;张琳叶;李仲民;何丽萍: "固相法制备赤泥基ZnFe2O4光Fenton催化剂", 非金属矿, vol. 43, no. 006, pages 1 * |
| 李燕中;刘昌俊;栾兆坤;彭先佳;张忠国;陈朝阳;: "活化赤泥吸附除磷及其机理的研究", 环境科学学报, no. 11 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111790422B (en) | Graphitized nitrogen-complexed Fe (III) -Fe0Catalyst, and synthesis method and application thereof | |
| CN104525206B (en) | Porous ozone catalyst for removing COD from waste water and preparation method thereof | |
| CN109364939B (en) | Method for removing antibiotics by using biochar loaded ferro-manganese bimetallic oxide photo-Fenton composite material | |
| CN111744476B (en) | Preparation method and application of red mud carbon-based catalyst | |
| CN104148007A (en) | Preparation method and application of multifunctional material for water treatment | |
| CN109731575A (en) | The Fenton sludge catalyst of catalytic ozonation nbsCOD and its preparation, application method | |
| CN109621974B (en) | CuMn2O4Method for treating polluted water by ozone catalytic oxidation and removal of pollutants through rGO composite material | |
| CN113117681A (en) | Method for treating industrial wastewater by enhanced Fenton | |
| CN113996316A (en) | Granulation method of heterogeneous Fenton catalyst | |
| CN110368900B (en) | Bamboo charcoal modified material and preparation method and application thereof | |
| CN111592090A (en) | Application method of red mud-based heterogeneous Fenton catalyst for advanced wastewater treatment | |
| CN110605138A (en) | Preparation method and application of tantalum oxygen nitrogen/foamed nickel photocatalytic contact oxide film | |
| CN113426455B (en) | Fenton-like catalyst with manganese dioxide clusters loaded with iron and preparation method thereof | |
| WO2020093517A1 (en) | Photocatalytic material for efficient and selective reduction and removal of nitrate nitrogen in water, and preparation method thereof | |
| CN114377681A (en) | Process for preparing spherical ozone catalyst by high-temperature modified red mud | |
| CN109499591B (en) | Preparation method and application of magnetically-recoverable photo-Fenton-like catalyst | |
| CN115228482B (en) | Ozone catalyst taking aluminum sludge as raw material and preparation method and application thereof | |
| CN111099918A (en) | Nano photocatalytic ceramic material | |
| CN111204836A (en) | Recyclable environment-friendly water purifying agent and preparation method thereof | |
| CN115041167A (en) | Preparation method and application of dual-activity catalyst based on alumina framework | |
| CN113457678A (en) | Nano ferroferric oxide loaded active carbon carrier, preparation method and application thereof in Fenton fluidized bed treatment | |
| CN108147614A (en) | A kind of preprocess method and device for refining oil reverse osmosis concentrated water | |
| CN108439529B (en) | Method for removing rhodamine B in water body by utilizing bismuth ferrite/bismuth tungstate heterojunction photocatalytic material | |
| CN109896548B (en) | Porous magnetic iron oxide red rich in lattice defects and preparation method thereof | |
| CN117753396A (en) | High-temperature-resistant visible light response type photocatalyst and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220422 |