CN102908985B - A kind of bentonite composite porous material and preparation method thereof - Google Patents
A kind of bentonite composite porous material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of bentonite composite porous material and preparation method thereof.The present invention take bentonite as matrix material, the technological means such as bentonite modified and porous moulding are used to change the performance of bentonite own, formation specific area is large, the porous organo bentonite of high adsorption capacity, thus make the bentonite composite porous material that can adsorb different kinds of ions, for Industrial Waste Water Treatments, organic absorption, and can not secondary pollution be formed.Present invention process is simple, and raw material is easy to get, and cost of manufacture is cheap, to COD, TP, TN, NH in sewage
3-N has extremely strong adsorption effect, and total removal rate can reach 95%.
Description
Technical field
The present invention relates to a kind of composite and preparation method thereof, particularly relate to a kind of bentonite composite porous material and preparation method thereof.
Background technology
Along with the industrial expansion such as papermaking, printing and dyeing, its industrial wastewater constantly discharged makes environmental pollution be on the rise.Industrial wastewater has that color is dark, and COD value is higher, forms complicated and changeable, and the feature such as distribute wide.The main method of current process industrial wastewater has bioanalysis, peroxide passivation, chemical method, electrolysis, absorption method etc.But the limitation all existed in various degree, as chemical method can produce a large amount of reluctant body refuses, although peroxide passivation is to chroma in waste water, COD all has good treatment effect, and cost is too high.Although bioanalysis cost is low, waste water can not be made to decolour completely, and the organic matter in most of waste water is to biological toxic side effect.Absorption method is mainly used in pretreatment (reduce water treatment agent set load, reclaim utility) and advanced treating (improve water quality treatment amount, meet quality of reused water requirement) generally adopts active carbon adsorption, but its regeneration difficulty is large, and easily run off, need constantly supplement, operating cost is high.
Bentonite as a kind of take montmorillonite as the clay of main component, permanent negative electrical charge is produced because non-equivalence cation replacement easily occurs its interlayer, and montmorillonite has very large surfaces externally and internally to be amassed, make it have higher ion exchange capacity and very strong adsorption capacity.Therefore be well suited for for the treatment of industrial wastewater, bentonite also has rich reserves as adsorbing medium simultaneously, cheap, preparation method is simple, treatment effect is good, nontoxic, tasteless, environmental sound, and can the advantage such as heavy-metal ion removal while dyestuff in process water.But because bentonite clay particle is trickle, function singleness, easily cause sludge quantity increase and cause secondary pollution, bring many difficulties to practical application.Therefore, be necessary to study the desolventing technology that montmorillonite is applied to dyeing wastewater.
CN101066765A discloses " a kind of composite material of organic-inorganic bentonite and synthetic method thereof ", the method is using bentonite as material of main part, first carry out inorganic modified by cation exchange reaction to bentonite with the hydroxy aluminum aqueous solution, product obtains after roasting has higher porosity and specific area and aluminium pillared bentonite containing reactive hydroxyl, and then with silylating reagent, by the Silanization reaction with aluminium pillared bentonite surfaces externally and internally hydroxyl by the silylation grafting containing organic group on aluminium pillared bentonite, finally acquire Organic-inorganic composite bentonite composite material.This composite had both had the feature of inorganic pillared bentonite porous, bigger serface, had again the feature that organobentonite organic carbon content is high, hydrophobicity is strong.But this composite manufacturing process is complicated, each step controlled temperature conditions very responsive being difficult to, and each several part is long for reaction time, and product recovery rate is lower, and production cost is high, and cost of water treatment is high.
CN100467119C discloses " a kind of preparation method of organic modified bentonite composite ", the method bentonite is added water stir, the condensation polymer of dicyandiamide and formaldehyde is added after stirring, carry out constant temperature oscillation reaction, be cooled to suction filtration after normal temperature, washing, obtained after dry, pulverize mesh sieve again.This bentonite composite material, when TREATMENT OF DYEING WASTEWATER WITH, has the features such as efficiency is high, consumption is few, sinking speed is fast, cost of water treatment is low.But this material is finally powder product, after process waste water, Powdered bentonite is dispersed in waste water, even if adopt flocculant to carry out flocculation treatment, is still difficult to remove completely, easily forms secondary pollution; And dicyandiamide and formaldehyde condensation polymer reaction are difficult to control, and product mass production is more difficult.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art and provide a kind of specific area large, high adsorption capacity, can not form secondary pollution, and can adsorb the bentonite composite porous material of different kinds of ions.
It is simple that another object of the present invention is to provide a kind of technique, and raw material is easy to get, the preparation method of the bentonite composite porous material that cost of manufacture is cheap.
The object of the present invention is achieved like this: a kind of bentonite composite porous material, it is characterized in that comprising bentonite powder, activating agent, water and blowing agent is made by the method comprising following steps by proportioning: be added to the water by activating agent and be stirred to dissolving and make activator solution, activator solution is poured into bentonite powder to stir, make medicinal bentonite suspension, again blowing agent is added medicinal bentonite suspension mix and blend, make it foam, pour the slurries after foaming into mould, air-dry dehydration post-drying is shaping; The proportioning of wherein said bentonite powder, activating agent, water and blowing agent is for benchmark with the weight of bentonite powder, the addition of activating agent is 5% ~ 10% of bentonite powder, the addition of water is 150% ~ 200% of bentonite powder, and the addition of blowing agent is bentonite powder 20 ~ 40%.
Described activating agent is cationic surfactant, is selected from least one of OTAC, softex kw, DDAO.
Described water is distilled water.
Described blowing agent adopts vegetalitas blowing agent.
A preparation method for bentonite composite porous material, is characterized in that comprising following steps:
1. by manually selected raw ore of calcium base bentonite abrasive dust, excessively 200 mesh sieves, make bentonite powder, bentonite powder is delivered to 100 ~ 110 DEG C, drying box and dries 1.5h ~ 2.5h, put into drier stand-by, control moisture≤12%;
2. activating agent is added in distilled water and be stirred to dissolving, make activator solution, activator solution is poured into mixing and stirring in bentonite powder, make medicinal bentonite suspension;
3. plant blowing agent is joined in medicinal bentonite suspension and stirs, then the porous gas outlet of oxygen increasing pump is deep into medicinal bentonite suspension high speed stir within 8 ~ 12 minutes, make it foam, make bentonite slurry;
4. bentonite slurry is poured into thickness 2cm ~ 4cm mould and be placed in ventilation, naturally dry 3h ~ 5h and be placed on drying forming in baker, oven drying temperature is 100 ~ 110 DEG C, and drying time is 1.5h ~ 2.5h.
Compared with prior art, the present invention has the following advantages:
(1) the present invention take bentonite as matrix material, the technological means such as bentonite modified and porous moulding are used to change the performance of bentonite own, formation specific area is large, the porous organo bentonite of high adsorption capacity, thus make the new material that can adsorb different kinds of ions, for Industrial Waste Water Treatments, organic absorption.
(2) porous material of the present invention can be shaping in block according to actual service condition, and bentonite in lump has certain intensity, can not disperse in sewage after abundant adsorption fouling thing; Bentonite in lump proportion is very little by about 0.5 in addition, by additional external force in water after adsorption fouling thing, removes material energy naturally float out of water-surface after external force, is beneficial to removal, can not forms secondary pollution.
(3) porous material of the present invention is to COD, TP, TN, the NH in sewage
3-N has extremely strong adsorption effect, and total removal rate can reach 95%.
(4) preparation method's technique of the present invention is simple, and raw material is easy to get, and cost of manufacture is cheap.
Accompanying drawing explanation
Fig. 1 is preparation method's process chart of the present invention.
Detailed description of the invention
Following examples will the invention will be further described by reference to the accompanying drawings.
Embodiment 1:
1. by manually selected raw ore of calcium base bentonite abrasive dust, excessively 200 mesh sieves, make bentonite powder, bentonite powder is placed in baker 100 DEG C and dries 1.5h, it is stand-by that drier put into by dried bentonite powder, controls moisture≤12%.Baker adopts electric drying oven with forced convection.
2. activating agent OTAC is added in distilled water and be stirred to dissolving, dissolve if be difficult to, can be hot a little, make activator solution, activator solution is poured in bentonite powder, adopt high speed agitator mixing and stirring, the phenomenon of caking can not be had, make medicinal bentonite suspension.The rotating speed of high speed agitator should to reach more than 1000r/min.
3. plant blowing agent is joined in medicinal bentonite suspension, add while be stirred to high speed agitator and stir, again the porous gas outlet of oxygen increasing pump is deep into medicinal bentonite suspension high speed and stirs 8 minutes, make its surface form evenly tiny and stable bubble, make bentonite slurry.Plant blowing agent can adopt the plant blowing agent of all kinds, and oxygen increasing pump adopts small-sized vortex pump.
4. poured into by bentonite slurry in the hardboard mould of thickness 2cm, naturally drying 3h, to be placed on temperature be dry 1.5h in 100 DEG C of bakers namely to obtain bentonite composite porous material finished product.
Embodiment 2
1. by manually selected raw ore of calcium base bentonite abrasive dust, excessively 200 mesh sieves, make bentonite powder, bentonite powder is placed in baker 105 DEG C and dries 2h, it is stand-by that drier put into by dried bentonite powder, controls moisture≤12%.Baker adopts electric drying oven with forced convection.
2. lammonium bromide is added in distilled water and be stirred to dissolving, dissolve if be difficult to, can be hot a little, make activator solution, activator solution is poured in bentonite powder, adopt high speed agitator mixing and stirring, the phenomenon of caking can not be had, make medicinal bentonite suspension.The rotating speed of high speed agitator should to reach more than 1000r/min.
3. plant blowing agent is joined in medicinal bentonite suspension, add while be stirred to high speed agitator and stir, again the porous gas outlet of oxygen increasing pump is deep into medicinal bentonite suspension high speed and stirs 10 minutes, make its surface form evenly tiny and stable bubble, make bentonite slurry.Plant blowing agent can adopt the plant blowing agent of all kinds, and oxygen increasing pump adopts small-sized vortex pump.
4. poured into by bentonite slurry in the hardboard mould of thickness 3cm, naturally drying 4h, to be placed on temperature be dry 2h in 105 DEG C of bakers namely to obtain bentonite composite porous material finished product.
Embodiment 3
1. by manually selected raw ore of calcium base bentonite abrasive dust, excessively 200 mesh sieves, make bentonite powder, bentonite powder is placed in baker 110 DEG C and dries 2.5h, it is stand-by that drier put into by dried bentonite powder, controls moisture≤12%.Baker adopts electric drying oven with forced convection.
2. activating agent DDAO is added in distilled water and be stirred to dissolving, dissolve if be difficult to, can be hot a little, make activator solution, activator solution is poured in bentonite powder, adopt high speed agitator mixing and stirring, the phenomenon of caking can not be had, make medicinal bentonite suspension.The rotating speed of high speed agitator should to reach more than 1000r/min.
3. plant blowing agent is joined in medicinal bentonite suspension, add while be stirred to high speed agitator and stir, again the porous gas outlet of oxygen increasing pump is deep into medicinal bentonite suspension high speed and stirs 12 minutes, make its surface form evenly tiny and stable bubble, make bentonite slurry.Plant blowing agent can adopt the plant blowing agent of all kinds, and oxygen increasing pump adopts small-sized vortex pump.
4. poured into by bentonite slurry in the hardboard mould of thickness 4cm, naturally drying 5h, to be placed on temperature be dry 2.5h in 110 DEG C of bakers namely to obtain bentonite composite porous material finished product.
Claims (1)
1. a bentonite composite porous material, comprise bentonite powder, activating agent, water and blowing agent, activating agent is added to the water and is stirred to dissolving and makes activator solution, pour activator solution heating into bentonite powder to stir, make medicinal bentonite suspension, then blowing agent is added medicinal bentonite suspension mix and blend, make it foam, pour the slurries after foaming into mould, air-dry dehydration post-drying is shaping; The proportioning of described bentonite powder, activating agent, water and blowing agent is for benchmark with the weight of bentonite powder, the addition of activating agent is 5% ~ 10% of bentonite powder, the addition of water is 150% ~ 200% of bentonite powder, and the addition of blowing agent is bentonite powder 20 ~ 40%; Described activating agent is cationic surfactant, is selected from least one of OTAC, softex kw, DDAO; Described water is distilled water; Described blowing agent adopts vegetalitas blowing agent; It is characterized in that: described bentonite composite porous material is made by the method comprised the steps:
1. by manually selected raw ore of calcium base bentonite abrasive dust, excessively 200 mesh sieves, make bentonite powder, bentonite powder is delivered to 100 ~ 110 DEG C, drying box and dries 1.5h ~ 2.5h, put into drier stand-by, control moisture≤12%;
2. activating agent is added in distilled water and be stirred to dissolving, make activator solution, activator solution is poured into mixing and stirring in bentonite powder, make medicinal bentonite suspension;
3. plant blowing agent is joined in medicinal bentonite suspension and stirs, then the porous gas outlet of oxygen increasing pump is deep into medicinal bentonite suspension high speed stir within 8 ~ 12 minutes, make it foam, make bentonite slurry;
4. bentonite slurry is poured into thickness 2cm ~ 4cm mould and be placed in ventilation, naturally dry 3h ~ 5h and be placed on drying forming in baker, oven drying temperature is 100 ~ 110 DEG C, and drying time is 1.5h ~ 2.5h.
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| CN104548889B (en) * | 2014-12-19 | 2016-06-08 | 湖北中非膨润土有限公司 | A kind of preparation method of bentonite desiccant |
| CN108179060A (en) * | 2018-01-07 | 2018-06-19 | 南京审计大学 | A kind of grease efficient decolorizing composition and its application |
| CN108529741A (en) * | 2018-04-26 | 2018-09-14 | 熊远 | Biological filtering material for waste water treatment and its preparation method and application |
| CN108823677B (en) * | 2018-07-02 | 2020-11-03 | 巢湖市天宇渔具有限公司 | Processing method of heat-resistant fishing net drawn wire with good toughness |
| CN110327904A (en) * | 2019-07-19 | 2019-10-15 | 四川正祥环保技术有限公司 | A kind of wastewater treatment material and preparation method thereof removing lead waste water |
| CN113617335B (en) * | 2021-09-14 | 2023-09-26 | 新疆大漠奇观生态科技有限公司 | Preparation method of wine filtering and quality improving material based on natural sodium bentonite |
| CN114887593B (en) * | 2022-04-24 | 2023-12-26 | 昆明理工大学 | Reversible organic bentonite and preparation method and application thereof |
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| CN1883787A (en) * | 2006-05-19 | 2006-12-27 | 浙江大学 | Process for polyvinyl alcohol embedding preparation of spherical bentonite |
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Effective date of registration: 20210407 Address after: 100032 No.11, Beishuncheng street, Xizhimen, Xicheng District, Beijing Patentee after: CHINA NATIONAL NONMETALLIC MINERALS INDUSTRIAL Corp. Address before: 436061 No.1, Maoshan Avenue, Liangzihu District, Ezhou City, Hubei Province Patentee before: HUBEI ZHONGFEI BENTONITE Corp.,Ltd. |
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