CN112495355A - Preparation process of sodium-containing bentonite additive - Google Patents
Preparation process of sodium-containing bentonite additive Download PDFInfo
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- CN112495355A CN112495355A CN202011306309.5A CN202011306309A CN112495355A CN 112495355 A CN112495355 A CN 112495355A CN 202011306309 A CN202011306309 A CN 202011306309A CN 112495355 A CN112495355 A CN 112495355A
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- 239000000654 additive Substances 0.000 title claims abstract description 29
- 230000000996 additive effect Effects 0.000 title claims abstract description 29
- 229910000278 bentonite Inorganic materials 0.000 title claims abstract description 27
- 239000000440 bentonite Substances 0.000 title claims abstract description 27
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 title claims abstract description 27
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title claims abstract description 24
- 239000011734 sodium Substances 0.000 title claims abstract description 24
- 229910052708 sodium Inorganic materials 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 34
- 238000003756 stirring Methods 0.000 claims abstract description 28
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims abstract description 27
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003456 ion exchange resin Substances 0.000 claims abstract description 21
- 229920003303 ion-exchange polymer Polymers 0.000 claims abstract description 21
- 239000000741 silica gel Substances 0.000 claims abstract description 21
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000007864 aqueous solution Substances 0.000 claims abstract description 13
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000007800 oxidant agent Substances 0.000 claims abstract description 13
- 230000001590 oxidative effect Effects 0.000 claims abstract description 13
- 239000011941 photocatalyst Substances 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 12
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 11
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000010457 zeolite Substances 0.000 claims abstract description 11
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 9
- 229920000642 polymer Polymers 0.000 claims abstract description 9
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims abstract description 9
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 239000002253 acid Substances 0.000 claims description 6
- 239000003957 anion exchange resin Substances 0.000 claims description 6
- 239000003729 cation exchange resin Substances 0.000 claims description 6
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical group [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 6
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 6
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 4
- 229940092782 bentonite Drugs 0.000 abstract description 19
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 abstract description 13
- 229940080314 sodium bentonite Drugs 0.000 abstract description 11
- 229910000280 sodium bentonite Inorganic materials 0.000 abstract description 11
- 238000004065 wastewater treatment Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 4
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 230000003373 anti-fouling effect Effects 0.000 abstract description 3
- 150000002500 ions Chemical class 0.000 description 7
- 239000010865 sewage Substances 0.000 description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 6
- 239000013505 freshwater Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000015784 hyperosmotic salinity response Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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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
- B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
-
- 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
-
- 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
-
- 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
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Dispersion Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a preparation process of a sodium-containing bentonite additive, which comprises the following steps: (1) mixing silica gel, zeolite powder, water and sodium carboxymethylcellulose in proportion and stirring into slurry; (2) mixing alumina, a photocatalyst and a high-temperature explosion-proof agent, adding the mixture into the slurry obtained in the step (1), and stirring the mixture for 5 to 8 hours at room temperature; (3) adding 30% acrylamide aqueous solution into the product obtained in the step (2), continuously stirring and mixing, adding 3% NN-methyl bisacrylamide, ion exchange resin, oxidant and reductant, fully stirring and mixing, carrying out polymerization reaction at room temperature, after the polymerization reaction is finished, continuously heating to 55-60 ℃ for reaction until a gelatinous high polymer is obtained, drying and crushing to obtain the sodium-containing bentonite additive. The invention improves the adsorption capacity of the sodium bentonite, thereby increasing the antifouling and wastewater treatment effects.
Description
Technical Field
The invention relates to the field of bentonite, and in particular relates to a preparation process of a sodium-containing bentonite additive.
Background
In the waste water treatment, especially in the industrial waste water treatment, the common adsorbent is mostly activated carbon, but the activated carbon adsorbent has obvious defects, poor selectivity and difficult regeneration. Therefore, the development of a series of new water treatment and purification materials with low price, good selectivity and easy regeneration has become a hotspot of current research and development. In recent years, the application of bentonite wastewater treatment materials in China is just started, a considerable number of engineering projects are carried out in non-freshwater environments such as sewage, brackish water and the like, sodium bentonite is a main raw material of the bentonite wastewater treatment material, and the sodium bentonite is used for treating heavy metal-containing wastewater, so that the method is simple, convenient, effective and low in cost, the release rate of heavy metal ions during desorption is low, and secondary pollution is reduced. However, the adsorption capacity of the existing sodium bentonite is limited, so that the wastewater treatment capacity of the sodium bentonite is limited.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a preparation process of a sodium-containing bentonite additive, which aims to solve the problem of poor treatment effect of sodium-based bentonite wastewater in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a preparation process of a sodium-containing bentonite additive comprises the following steps:
(1) mixing silica gel, zeolite powder, water and sodium carboxymethylcellulose in proportion and stirring into slurry;
(2) mixing alumina, a photocatalyst and a high-temperature explosion-proof agent, adding the mixture into the slurry obtained in the step (1), and stirring the mixture for 5 to 8 hours at room temperature;
(3) adding 30% acrylamide aqueous solution into the product obtained in the step (2), continuously stirring and mixing, adding 3% NN-methyl bisacrylamide, ion exchange resin, oxidant and reductant, fully stirring and mixing, carrying out polymerization reaction at room temperature, after the polymerization reaction is finished, continuously heating to 55-60 ℃ for reaction until a gelatinous high polymer is obtained, drying and crushing to obtain the sodium-containing bentonite additive.
Further, in the step (1), the component ratio of the silica gel, the zeolite powder, the water and the sodium carboxymethyl cellulose is 1: 1: 5: 0.01, the mixing temperature is 90-100 DEG C0C。
Further, in the step (2), the photocatalyst is TiO 2; the weight ratio of silica gel, alumina, photocatalyst and high-temperature explosion-proof agent is 100: 10-14: 8-16: 5-10.
Further, the time of the polymerization reaction in the step (3) is 30-40 minutes; the weight ratio of silica gel, 30% acrylamide aqueous solution, 3% NN-methyl bisacrylamide, ion exchange resin, oxidant and reductant is 100: 200-300: 1-3: 4-7: 1-5: 1-3.
Further, in the step (3), the oxidant is MnO 2; the reducing agent is sodium thiosulfate.
Further, the ion exchange resin in the step (3) is a mixture of a strong base type anion exchange resin and a strong acid cation exchange resin.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the polymer additive is added into the common sodium bentonite, so that the performance of the sodium bentonite in a non-freshwater environment is improved, and the adsorption capacity of the sodium bentonite is improved, thereby increasing the antifouling and wastewater treatment effects; the principle of the invention is that the high molecular additive has the characteristic of strong water absorption, water retention and salt tolerance, and the high molecular additive and sodium bentonite form a compact diaphragm structure after water absorption, and the structure has extremely low pressure resistance and permeability and can meet the requirements of wastewater treatment engineering in non-freshwater environment; the invention can use ion exchange resin to convert H into H+，OH-Exchange with the anion and cation in the sewage to remove the harmful ion in the sewage, the zeolite powder has large specific surface area and can physically adsorb the ion and organic matter in the sewage, especially heavy metal ion.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to limit the scope of the invention, and all techniques and materials that can be made based on the above teachings of the invention are within the scope of the invention.
A preparation process of a sodium-containing bentonite additive comprises the following steps:
(1) mixing silica gel, zeolite powder, water and sodium carboxymethylcellulose according to the weight ratio of 1: 1: 5: 0.01 into slurry, and the mixing temperature is 90-100 DEGOC；
(2) Mixing alumina, photocatalyst and high-temperature explosion-proof agent, adding into the slurry, stirring at room temperature for 5-8 hours; the photocatalyst is TiO 2; wherein the weight ratio of the silica gel to the alumina to the photocatalyst to the high-temperature explosion-proof agent is 100: 10-14: 8-16: 5-10;
(3) after fully stirring, adding 30% acrylamide aqueous solution into the slurry obtained in the step (2), continuously stirring and mixing, adding 3% NN-methyl bisacrylamide, ion exchange resin, oxidant and reducing agent, fully stirring and mixing, then carrying out polymerization reaction for 30-40 minutes at room temperature, heating to 55-60 ℃ for reaction until gelatinous high polymer is obtained, drying and crushing to prepare powder or granules, and preparing the sodium-containing bentonite additive; wherein the weight ratio of silica gel, 30% acrylamide aqueous solution, 3% NN-methyl bisacrylamide, ion exchange resin, oxidant and reductant is 100: 200-300: 1-3: 4-7: 1-5: 1-3; the oxidant is MnO 2; the reducing agent is sodium thiosulfate. The ion exchange resin is a mixture of a strong base anion exchange resin and a strong acid cation exchange resin.
Example 1
A preparation process of a sodium-containing bentonite additive comprises the following steps:
(1) mixing silica gel, zeolite powder, water and sodium carboxymethylcellulose according to the weight ratio of 1: 1: 5: 0.01 into slurry with the mixing temperature of 950C；
(2) Mixing alumina, TiO2 and a high-temperature explosion-proof agent, adding into the slurry, and stirring for 8 hours at room temperature; wherein the weight ratio of the silica gel to the alumina to the photocatalyst to the high-temperature explosion-proof agent is 100: 14: 8: 8;
(3) after fully stirring, adding 30% acrylamide aqueous solution into the slurry obtained in the step (2), continuously stirring and mixing, adding 3% NN-methyl bisacrylamide, ion exchange resin, MnO2 and sodium thiosulfate, fully stirring and mixing, carrying out polymerization reaction for 40 minutes at room temperature, heating to 60 ℃ for reaction until a gelatinous high polymer is obtained, drying and crushing to prepare powder or granules, and preparing the sodium-containing bentonite additive; wherein the weight ratio of silica gel, 30% acrylamide aqueous solution, 3% NN-methyl bisacrylamide, ion exchange resin, oxidant and reductant is 100: 300: 2: 7: 1: 2; the ion exchange resin is a mixture of a strong base anion exchange resin and a strong acid cation exchange resin.
Example 2
A preparation process of a sodium-containing bentonite additive comprises the following steps:
(1) mixing silica gel, zeolite powder, water and sodium carboxymethylcellulose according to the weight ratio of 1: 1: 5: 0.01 into slurry with the mixing temperature of 100OC；
(2) Mixing alumina, TiO2 and a high-temperature explosion-proof agent, adding into the slurry, and stirring for 6 hours at room temperature; wherein the weight ratio of the silica gel to the alumina to the photocatalyst to the high-temperature explosion-proof agent is 100: 10: 12: 5;
(3) after fully stirring, adding 30% acrylamide aqueous solution into the slurry obtained in the step (2), continuously stirring and mixing, adding 3% NN-methyl bisacrylamide, ion exchange resin, MnO2 and sodium thiosulfate, fully stirring and mixing, carrying out polymerization reaction at room temperature for 30 minutes, heating to 55 ℃ for reaction until a gelatinous high polymer is obtained, drying and crushing to prepare powder or granules, and preparing the sodium-containing bentonite additive; wherein the weight ratio of silica gel, 30% acrylamide aqueous solution, 3% NN-methyl bisacrylamide, ion exchange resin, oxidant and reductant is 100: 200: 3: 4: 5: 1; the ion exchange resin is a mixture of a strong base anion exchange resin and a strong acid cation exchange resin.
Example 3
A preparation process of a sodium-containing bentonite additive comprises the following steps:
(1) mixing silica gel, zeolite powder, water and sodium carboxymethylcellulose according to the weight ratio of 1: 1: 5: 0.01 into slurry, and the mixing temperature is 90 DEGOC；
(2) Mixing alumina, TiO2 and a high-temperature explosion-proof agent, adding into the slurry, and stirring for 5 hours at room temperature; wherein the weight ratio of the silica gel to the alumina to the photocatalyst to the high-temperature explosion-proof agent is 100: 12: 16: 10;
(3) after fully stirring, adding 30% acrylamide aqueous solution into the slurry obtained in the step (2), continuously stirring and mixing, adding 3% NN-methyl bisacrylamide, ion exchange resin, MnO2 and sodium thiosulfate, fully stirring and mixing, carrying out polymerization reaction at room temperature for 34 minutes, heating to 57 ℃ for reaction until a gelatinous high polymer is obtained, drying and crushing to prepare powder or granules, and preparing the sodium-containing bentonite additive; wherein the weight ratio of silica gel, 30% acrylamide aqueous solution, 3% NN-methyl bisacrylamide, ion exchange resin, oxidant and reductant is 100: 260: 1: 5: 3: 3; the ion exchange resin is a mixture of a strong base anion exchange resin and a strong acid cation exchange resin.
According to the invention, the polymer additive is added into the common sodium bentonite, so that the performance of the sodium bentonite in a non-freshwater environment is improved, and the adsorption capacity of the sodium bentonite is improved, thereby increasing the antifouling and wastewater treatment effects. The principle of the invention is that the high molecular additive has the characteristic of strong water absorption, water retention and salt tolerance, and the high molecular additive and sodium bentonite form a compact diaphragm structure after water absorption, and the structure has extremely low pressure resistance and permeability and can meet the requirements of wastewater treatment engineering in non-freshwater environment; the invention can use ion exchange resin to convert H into H+，OH-Exchange with the anion and cation in the sewage to remove the harmful ion in the sewage, the zeolite powder has large specific surface area and can physically adsorb the ion and organic matter in the sewage, especially heavy metal ion.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
Claims (6)
1. A preparation process of a sodium-containing bentonite additive is characterized by comprising the following steps: (1) mixing silica gel, zeolite powder, water and sodium carboxymethylcellulose in proportion and stirring into slurry; (2) mixing alumina, a photocatalyst and a high-temperature explosion-proof agent, adding the mixture into the slurry obtained in the step (1), and stirring the mixture for 5 to 8 hours at room temperature; (3) adding 30% acrylamide aqueous solution into the product obtained in the step (2), continuously stirring and mixing, adding 3% NN-methyl bisacrylamide, ion exchange resin, oxidant and reductant, fully stirring and mixing, carrying out polymerization reaction at room temperature, after the polymerization reaction is finished, continuously heating to 55-60 ℃ for reaction until a gelatinous high polymer is obtained, drying and crushing to obtain the sodium-containing bentonite additive.
2. The preparation process of the sodium-containing bentonite additive according to claim 1, wherein the ratio of the components of the silica gel, the zeolite powder, water and the sodium carboxymethylcellulose in the step (1) is 1: 1: 5: 0.01, the mixing temperature is 90-100 DEG C0C。
3. The process for preparing the sodium-containing bentonite additive according to claim 1, wherein the photocatalyst in the step (2) is TiO 2; the weight ratio of silica gel, alumina, photocatalyst and high-temperature explosion-proof agent is 100: 10-14: 8-16: 5-10.
4. The process for preparing the sodium-containing bentonite additive according to claim 1, wherein the time of the polymerization reaction in the step (3) is 30-40 minutes; the weight ratio of silica gel, 30% acrylamide aqueous solution, 3% NN-methyl bisacrylamide, ion exchange resin, oxidant and reductant is 100: 200-300: 1-3: 4-7: 1-5: 1-3.
5. The process for preparing the sodium-containing bentonite additive according to claim 1, wherein the oxidant in the step (3) is MnO 2; the reducing agent is sodium thiosulfate.
6. The process for preparing sodium-containing bentonite additive according to claim 1, wherein the ion exchange resin in the step (3) is a mixture of a strong base anion exchange resin and a strong acid cation exchange resin.
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| CN105858677A (en) * | 2016-04-13 | 2016-08-17 | 砚山县利达矿粉厂 | Organic bentonite and preparation method thereof |
| CN109399654A (en) * | 2018-05-14 | 2019-03-01 | 句容康泰膨润土有限公司 | A kind of bentonite composite high-water uptake material and preparation method thereof |
| CN110922947A (en) * | 2019-12-10 | 2020-03-27 | 桂林理工大学 | Additive for reducing inhibition of swelling performance of bentonite by seawater |
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2020
- 2020-11-19 CN CN202011306309.5A patent/CN112495355A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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