CN104016439B - For removing the filtration medium of formaldehyde in tap water, filter core and preparation method - Google Patents
For removing the filtration medium of formaldehyde in tap water, filter core and preparation method Download PDFInfo
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Abstract
The present invention provides a kind of preparation method removing the filtration medium of formaldehyde in tap water, comprise the following steps: a) by ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent mixing, obtaining mixture, the weight ratio of described ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent is 200��300:50��100:50��100:50��100:50��100; B) mixture by step a) gained is suppressed in a mold, sinters, is cooled. The present invention is under the synergy of above-mentioned raw materials, and the filtration medium prepared is to the clearance height of formaldehyde in water, and method is simple, in addition owing to using filter core, is not powder body, so without the need to subsequent disposal, being applicable to the process of home terminal drinking-water. After testing this filtration medium to the clearance of formaldehyde in tap water more than 98.4%.
Description
Technical field
The present invention relates to a kind of filtration medium and its preparation method of removing formaldehyde in tap water, the filter core being made up of this filtration medium, water purifying plant and drinking Fountains.
Background technology
Formaldehyde (molecular formula: HCHO), also known as formaldehyde, is the simplest aldehyde class, is a kind of flammable, colourless and irritant gas under normal circumstances. Soluble in water, alcohol and ether. The formalin of 35%��40% is called formalin. Formaldehyde is a kind of important organic raw material, is mainly used in plastics industry (such as resol processed, urea-formaldehyde plastics electricity jade), synthon (such as synthesis vinylon polyvinyl formal), leather industry, medicine, dyestuff etc. Formaldehyde is a class carcinogenic substance.
In daily life, formaldehyde is ubiquitous. Daily necessities, sanitising agent, sanitas, sterilant, sterilizing agent all have formaldehyde; Formaldehyde is had in the urea-formaldehyde resin of lagging material; Material of construction finishing material as in the binding agent on metope and ground, wood-based plate, chemical fibre carpet, plastic plate, coating containing formaldehyde. In May, 2012, cutting off the water supply because the water purification plant of formaldehyde is once stopping production in You Sange county of Japan, 340,000 residents are influenced.
The process effect of conventional water technology PARA FORMALDEHYDE PRILLS(91,95) is not good, can not effectively remove formaldehyde; Single-activity charcoal adsorption effect is not good, and reverse osmosis method uses trouble, water wasting expense electricity, cost height, and the concentrated solution of discharge not easily processes, and easily causes secondary pollution; Ion-exchange techniques is loaded down with trivial details, replace saturated after wash-down water be difficult to process; Extraction process and distillation method power consumption are relatively big and process is loaded down with trivial details; And the precipitator method there will be the difficult problem of process equally.
Summary of the invention
In view of this, the technical problem that the present invention solves is to provide a kind of filtration medium and its preparation method, and this filtration medium is to the clearance height of the formaldehyde in tap water, and method is simple. Additionally provide the filter core, purifier and the water dispenser that are made up of this kind of filtration medium.
The present invention provides a kind of preparation method removing the filtration medium of formaldehyde in tap water, comprises the following steps:
A) by ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent mixing, obtaining mixture, the weight ratio of described ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent is 200��300:50��100:50��100:50��100:50��100;
B) mixture by step a) gained is suppressed in a mold, sinters, is cooled.
Preferably, also comprising medical stone powder, the weight ratio of described medical stone powder and described ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent is 50��100:200��300:50��100:50��100:50��100:50��100.
Preferably, described medical stone powder is the medical stone powder through manganese modification.
Preferably, vermiculite power is also comprised.
Preferably, the weight ratio of described vermiculite power and described ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent is 80��150:200��300:50��100:50��100:50��100:50��100.
The present invention provides the filtration medium for removing formaldehyde in tap water that the preparation method according to the claims obtains.
The present invention provides a kind of filter core, is made up of the filtration medium described in the claims.
The present invention provides a kind of purifier, comprises the filtration medium described in the claims or the filter core described in the claims.
The present invention provides a kind of water dispenser, comprises the purifier described in the claims.
Compared with prior art, the present invention provides a kind of preparation method removing the filtration medium of formaldehyde in tap water, comprise the following steps: a) by ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent mixing, obtaining mixture, the weight ratio of described ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent is 200��300:50��100:50��100:50��100:50��100; B) mixture by step a) gained is suppressed in a mold, sinters, is cooled. The present invention is under the synergy of above-mentioned raw materials, the filtration medium prepared is to the clearance height of formaldehyde in water, method is simple, is applicable to exempt, by the tap water that it pollutes, the injury that human body is produced by element formaldehyde, easy to use, cost is low, in addition owing to using filter core, is not powder body, so without the need to subsequent disposal, being applicable to the process of home terminal drinking-water. After testing this filtration medium to the clearance of formaldehyde in tap water more than 98.4%.
Embodiment
The present invention provides a kind of preparation method removing the filtration medium of formaldehyde in tap water, comprises the following steps:
The present invention provides a kind of preparation method removing the filtration medium of formaldehyde in tap water, comprises the following steps:
A) by ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent mixing, obtaining mixture, the weight ratio of described ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent is 200��300:50��100:50��100:50��100:50��100;
B) mixture by step a) gained is suppressed in a mold, sinters, is cooled.
The present invention is first by ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent mixing, obtaining mixture, the weight ratio of described ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent is 200��300:50��100:50��100:50��100:50��100; It is preferably 210��290:60��90:60��90:60��90:60��90; It is more preferably 220��280:65��85:65��85:65��85:65��85.
In the present invention, the weight-average molecular weight of described ultrahigh molecular weight polyethylene(UHMWPE) is preferably 1,000,000��7,000,000, it is more preferable to be 2,000,000��6,000,000, it is most preferred that be 2,500,000��4,000,000. Preferred particle diameter is 89 ��m��104 ��m. Ultrahigh molecular weight polyethylene(UHMWPE) can obtain from domestic production producer, as second auxiliary factory of Beijing Orient petrochemical complex company limited can provide the product of M-I type (molecular weight is 150 �� 500,000), M-II type (molecular weight is 250 �� 500,000), M-III type (molecular weight is 350 �� 500,000), M-IV type (molecular weight is for being greater than 4,000,000) equal-specification. An effect of ultrahigh molecular weight polyethylene(UHMWPE) is bonding and the effect forming filtration medium skeleton, because the molecular weight of ultrahigh molecular weight polyethylene(UHMWPE) is big, melt viscosity is very high, can not flow after melting, so utilizing ultrahigh molecular weight polyethylene(UHMWPE) by compacting, sinter the filtration medium obtained, it is easy to form micropore, it is possible to play the effect of formaldehyde in planar water.
In the present invention, gac is a kind of porous material, has cellular pore texture, bigger specific surface area, special surface functional group, stable process based prediction model, is excellent sorbent material, catalyzer or support of the catalyst. Different activities charcoal according to raw material sources is preferably divided into the gac etc. that wood activated charcoal, mineral raw material gac and other raw materials make. Wherein, described wood activated charcoal preferably includes cocoanut active charcoal, apricot shell gac, wooden burgy; It is the gac that raw material is made that described mineral raw material gac preferably includes various coal and oil and processed products thereof; The gac that the gac that other raw materials are made preferably includes waste rubber, plastic waste is made. The present invention preferably uses the gac taking coconut husk material as source, and its intensity is higher, absorption property good, it is more preferable to be the medical activated carbon taking coconut husk material as source. In the present invention, the specific surface area of described gac is preferably not less than 500m2/ g, it is more preferable to be not less than 1000m2/ g. Gac can organism, the especially medical activated carbon in planar water efficiently, as the product by the relevant medicine supervision standard of country excessively, foreign matter content is low, and surface-area is bigger, adsorption effect is also better, and filtration medium is directly used in the process of tap water to select medical activated carbon to ensure.
Montmorillonite (Montmorillonite) is the layer mineral being made up of the hydrous alumino silicates that particle is superfine, and title derives from the place of production first found--the Montmorillon of France. Montmorillonite subtribe belongs to one of smectite race (smectite) mineral (another subtribe is saponite saponite), is important clay mineral, is generally bulk or earthy. Molecular formula (Al, Mg) 2 [Si4O10] (OH) 2 nH2O, centre is alumina octahedral, the clay mineral of the three-layer tablet shape structure formed for silicon-oxy tetrahedron up and down, moisture and some exchange cations between crystal synthem, there is higher loading capacity, there is higher water-swelling ability. Montmorillonite Crystal belongs to the moisture laminate structure silicate minerals of oblique system. Illiteracy of the present invention holder stone flour is selected from 180��200 objects and covers holder stone flour. Its structure belongs to laminate structure, and through activation treatment, its laminated crystalline becomes comparatively loose superposition by original dense structure, thus its specific surface area is increased, and adsorptive power increases. They are different from the hole shape absorption of gac, and the absorption of its stratiform has better adsorption for formaldehyde. The present invention preferably uses the montmorillonite powder through acid activation, acid activation method is: pulverized by montmorillonite, is the hydrochloric acid of 5wt%��10wt% or sulfuric acid dip treating 8��15 hours by concentration, in sodium carbonate or caustic alkali and after washing, then dry, it is crushed to required granularity. The particle diameter of the preferred montmorillonite powder of the present invention is 61 ��m��89 ��m.
The hydrotalcite powder of the present invention is the lamellar compound that a class is made up of the negatively charged ion of filling negative charge between positively charged and layer, also known as layered hydroxide. Hydrotalcite oxide compound through roasting can be reuptaked the negatively charged ion in water under certain conditions thus recover the hydrotalcite for laminate structure. This kind of unique memory effect makes hydrotalcite can be used as high-efficiency anion sorbent material and apply. High price profit easily exchanges and enters hydrotalcite layers, at a low price negatively charged ion be easy to be swapped out and exchange capacity big. Hydrotalcite powder PARA FORMALDEHYDE PRILLS(91,95) has very strong adsorption. It and above-mentioned active carbon powder, ultrahigh molecular weight polyethylene(UHMWPE) powder and montmorillonite powder synergy are very good to the process effect of formaldehyde in water.
Gas generation agent of the present invention is that a class easily decomposes the material producing a large amount of gas and cause hair engaging aperture effect, and wherein azo compound, sodium bicarbonate, bicarbonate of ammonia, volatile salt, sulphonyl nitrile compounds, oxalic acid etc. are that it typically represents. As preferably, gas generation agent is at least one in Cellmic C 121, food grade ammonium bicarbonate, oxalic acid. Wherein, food grade ammonium bicarbonate also claims AMMONIUM BICARBONATE FOOD GRADE, distinguishes with technical grade bicarbonate of ammonia. Although technical grade bicarbonate of ammonia also has the effect of hair engaging aperture, but it may contain the impurity of insalubrity, should not be used as the raw materials for production of tap water filtration medium.
In the present invention, cooperatively interacting and interacting by above-mentioned ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, magnesium hydroxide powder, modified alta-mud powder and gas generation agent, makes the clearance height for the formaldehyde in tap water jointly, effective.
In the present invention, preferably also comprising medical stone powder, the weight ratio of described medical stone powder and described ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, magnesium hydroxide powder, modified alta-mud powder, gas generation agent is preferably 50��100:200��300:50��100:50��100:50��100:50��100; It is more preferably 60��90:210��290:60��90:60��90:60��90:60��90; It most preferably is 65��85:220��280:65��85:65��85:65��85:65��85.
In the present invention, medical stone powder material source is extremely abundant, inexpensive, absorption property is good and has good mineralising, biological activity, stripping property. The medical stone powder of the present invention is preferably past the medical stone powder of manganese modification. It is specially: utilize MnO2The condition of the best modification medical stone powder of preparation is: pre-treatment medical stone powder and MnSO4��KMnO4Solution mixed gel 40min, makes the MnO of pre-treatment medical stone powder and generation2Weight ratio is 5, digestion time 2.0d, clean dry after under 400 DEG C of high temperature roasting 1.5h.
In the present invention, described medical stone powder and above-mentioned ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent can cooperatively interact and interact, and can significantly improve the clearance of the formaldehyde in tap water, better effects if.
In the present invention, preferably also comprising worm vermiculite power, the weight ratio of described vermiculite power and described ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, magnesium hydroxide powder, modified alta-mud powder, gas generation agent is preferably 80��150:200��300:50��100:50��100:50��100:50��100; It is more preferably 90��140:210��290:60��90:60��90:60��90:60��90; It most preferably is 100��130:220��280:65��85:65��85:65��85:65��85.
In the present invention, vermiculite is a kind of natural, nontoxic mineral substance, can expand under high temperature action. Vermiculite power is powdered through high-temperature roasting, screening, attrition process by primary mineral of vermiculite. The a lot of pore of oil-containing in vermiculite power particle, has very big specific surface area, has multiple use, can be used as material of construction, fire prevention insulating material etc. Contriver finds through the research of creativeness, and vermiculite power has good effect for the formaldehyde adsorbed in tap water. Preferably, the particle diameter of vermiculite power of the present invention is 44 ��m��74 ��m.
In the present invention, by above-mentioned ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent, the cooperatively interacting and interacting of vermiculite power, jointly make the clearance height for the formaldehyde in tap water, effective. And cooperatively interacting and interacting of above-mentioned substance and medical stone powder more can improve the clearance of formaldehyde in water.
In the present invention, source and purity for above-mentioned raw materials is not particularly limited, it is preferable to commercially available.
The present invention for step in above-mentioned preparation method a) in several raw materials used carried out comparatively detailed description, under the collaborative adduction of this several raw material, the formaldehyde in water can fully be adsorbed.
In the present invention, for the mixing of above-mentioned raw materials without any restriction, can for any low shear mixer or agitator that can not significantly change diameter of particle and size-grade distribution, it is preferable that can be the agitator of blunt impeller vane, drum-type mixing tank, screw mixer etc. This depending on the type of mixing tank, not limited, it is preferable to avoided dust of kicking up by the rotating speed for above-mentioned mixer and agitator.
After above-mentioned raw materials is mixed, the mixture of step a) gained is suppressed in a mold, sinters, cooled.
Being specially, be filled in pre-designed mould by mixed powder body, by pressurization by its compacting, pressure is preferably not more than 2MPa, it is more preferable to be 0.5��1.5MPa, and the material with mould therefor adapts; Mould can by aluminium, cast iron, steel or any material manufacture that can bear relevant pressure and temperature suitably. In mould inner surface release agent application, can select silicone oil or any other the commercially available releasing agent that almost can not be adsorbed onto on filtration medium, it is possible to use release paper. Sintering temperature is 200 DEG C��300 DEG C, and sintering time is 120 minutes��150 minutes, is cooled to 40 DEG C��60 DEG C demouldings after sintering. In this making processes, after contriver's test many times, drawing the filtration medium produced in 200 DEG C��300 DEG C in sintering temperature scope, filter effect is better.
Present invention also offers following technical scheme: the filter core of formaldehyde in a kind of removal tap water being made up of above-mentioned filtration medium.
Present invention also offers following technical scheme: a kind of purifier, comprises above-mentioned filtration medium or filter core.
Present invention also offers a kind of water dispenser comprising above-mentioned purifier.
The present invention is under the synergy of above-mentioned raw materials, the filtration medium prepared is to the clearance height of formaldehyde in water, method is simple, is applicable to exempt, by the tap water that it pollutes, the injury that human body is produced by element formaldehyde, easy to use, cost is low, in addition owing to using filter core, is not powder body, so without the need to subsequent disposal, being applicable to the process of home terminal drinking-water. After testing this filtration medium to the clearance of formaldehyde in tap water more than 98.4%.
In order to the present invention is described further, below in conjunction with embodiment, the filtration medium of removal tap water formaldehyde provided by the invention is described in detail.
Embodiment 1
(1) taking ultrahigh molecular weight polyethylene(UHMWPE) powder 200g, described ultrahigh molecular weight polyethylene(UHMWPE) is the M-I type product of second auxiliary factory of Beijing Orient petrochemical complex company limited, and its molecular weight is 1,500,000;
(2) taking medicinal active powdered carbon 50g, the specific surface area of described medical activated carbon is 800m2/ g;
(3) montmorillonite powder 50g is taken;
(4) hydrotalcite powder 50g is taken;
(5) gas generation agent 50g is taken;
(6) above-mentioned five kinds of powder are put into mechanical stirrer stirring within 10 minutes, mix;
(7) mixed powder is packed in tubular die, in the hydraulic pressure pressure system of 0.7MPa, at 260 DEG C of temperature, sinters 120 minutes;
(8) naturally cool to 50 DEG C then with the siloxanes uranium releasing agent demoulding, obtain filter core.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Embodiment 2
(1) taking ultrahigh molecular weight polyethylene(UHMWPE) powder 250g, described ultrahigh molecular weight polyethylene(UHMWPE) is the M-III type product of second auxiliary factory of Beijing Orient petrochemical complex company limited, and its molecular weight is 3,500,000;
(2) taking medicinal active powdered carbon 75g, the specific surface area of described medical activated carbon is 1500m2/ g;
(3) the montmorillonite powder 75g of 200 orders, acid activation is taken;
(4) hydrotalcite powder 75g is taken;
(5) gas generation agent 75g is taken;
(6) above-mentioned five kinds of powder are put into screw mixer stirring within 10 minutes, mix;
(7) mixed powder is packed in tubular die, in the hydraulic pressure pressure system of 0.6MPa, at 280 DEG C of temperature, sinters 130 minutes;
(8) naturally cool to 50 DEG C then with the siloxanes uranium releasing agent demoulding, obtain filter core.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Embodiment 3
(1) taking ultrahigh molecular weight polyethylene(UHMWPE) powder 300g, described ultrahigh molecular weight polyethylene(UHMWPE) is the M-IV type product of second auxiliary factory of Beijing Orient petrochemical complex company limited, and its molecular weight is 4,500,000;
(2) taking medicinal active powdered carbon 100g, the specific surface area of described medical activated carbon is 1200m2/ g;
(3) the montmorillonite powder 100g of 200 orders, acid activation is taken;
(4) hydrotalcite powder 100g is taken;
(5) gas generation agent 100g is taken;
(6) above-mentioned five kinds of powder are put into screw mixer stirring within 10 minutes, mix;
(7) mixed powder is packed in tubular die, in the hydraulic pressure pressure system of 0.9MPa, at 220 DEG C of temperature, sinters 150 minutes;
(8) naturally cool to 40 DEG C and then use the release paper demoulding, obtain filter core.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Embodiment 4
(1) taking ultrahigh molecular weight polyethylene(UHMWPE) powder 300g, described ultrahigh molecular weight polyethylene(UHMWPE) is the M-IV type product of second auxiliary factory of Beijing Orient petrochemical complex company limited, and its molecular weight is 4,500,000;
(2) taking medicinal active powdered carbon 100g, the specific surface area of described medical activated carbon is 1200m2/ g;
(3) the montmorillonite powder 100g of 200 orders, acid activation is taken;
(4) hydrotalcite powder 100g is taken;
(5) gas generation agent 100g is taken;
(6) the medical stone powder 75g of manganese modification is taken;
(7) above-mentioned six kinds of powder are put into screw mixer stirring within 10 minutes, mix;
(8) mixed powder is packed in tubular die, in the hydraulic pressure pressure system of 0.9MPa, at 220 DEG C of temperature, sinters 150 minutes;
(9) naturally cool to 40 DEG C and then use the release paper demoulding, obtain filter core.
Embodiment 5
(1) taking ultrahigh molecular weight polyethylene(UHMWPE) powder 300g, described ultrahigh molecular weight polyethylene(UHMWPE) is the M-IV type product of second auxiliary factory of Beijing Orient petrochemical complex company limited, and its molecular weight is 4,500,000;
(2) taking medicinal active powdered carbon 100g, the specific surface area of described medical activated carbon is 1200m2/ g;
(3) the montmorillonite powder 100g of 200 orders, acid activation is taken;
(4) hydrotalcite powder 100g is taken;
(5) gas generation agent 100g is taken;
(6) vermiculite power 100g is taken;
(7) above-mentioned six kinds of powder are put into screw mixer stirring within 10 minutes, mix;
(8) mixed powder is packed in tubular die, in the hydraulic pressure pressure system of 0.9MPa, at 220 DEG C of temperature, sinters 150 minutes;
(9) naturally cool to 40 DEG C and then use the release paper demoulding, obtain filter core.
Embodiment 6
(1) taking ultrahigh molecular weight polyethylene(UHMWPE) powder 300g, described ultrahigh molecular weight polyethylene(UHMWPE) is the M-IV type product of second auxiliary factory of Beijing Orient petrochemical complex company limited, and its molecular weight is 4,500,000;
(2) taking medicinal active powdered carbon 100g, the specific surface area of described medical activated carbon is 1200m2/ g;
(3) the montmorillonite powder 100g of 200 orders, acid activation is taken;
(4) hydrotalcite powder 100g is taken;
(5) gas generation agent 100g is taken;
(6) vermiculite power 100g is taken;
(7) the medical stone powder 75g of manganese modification is taken;
(8) above-mentioned seven kinds of powder are put into screw mixer stirring within 10 minutes, mix;
(9) mixed powder is packed in tubular die, in the hydraulic pressure pressure system of 0.9MPa, at 220 DEG C of temperature, sinters 150 minutes;
(10) naturally cool to 40 DEG C and then use the release paper demoulding, obtain filter core.
Comparative example 1
(1) taking ultrahigh molecular weight polyethylene(UHMWPE) powder 200g, described ultrahigh molecular weight polyethylene(UHMWPE) is the M-I type product of second auxiliary factory of Beijing Orient petrochemical complex company limited, and its molecular weight is 1,500,000;
(2) taking medicinal active powdered carbon 50g, the specific surface area of described medical activated carbon is 800m2/ g;
(3) gas generation agent 50g is taken;
(4) above-mentioned three kinds of powder are put into mechanical stirrer stirring within 10 minutes, mix;
(5) mixed powder is packed in tubular die, in the hydraulic pressure pressure system of 0.7MPa, at 260 DEG C of temperature, sinters 120 minutes;
(6) naturally cool to 50 DEG C then with the siloxanes uranium releasing agent demoulding, obtain filter core.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Comparative example 2
(1) taking ultrahigh molecular weight polyethylene(UHMWPE) powder 200g, described ultrahigh molecular weight polyethylene(UHMWPE) is the M-I type product of second auxiliary factory of Beijing Orient petrochemical complex company limited, and its molecular weight is 1,500,000;
(2) taking medicinal active powdered carbon 50g, the specific surface area of described medical activated carbon is 800m2/ g;
(3) hydrotalcite powder 50g is taken;
(4) above-mentioned three kinds of powder are put into mechanical stirrer stirring within 10 minutes, mix;
(5) mixed powder is packed in tubular die, in the hydraulic pressure pressure system of 0.7MPa, at 260 DEG C of temperature, sinters 120 minutes;
(6) naturally cool to 50 DEG C then with the siloxanes uranium releasing agent demoulding, obtain filter core.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Comparative example 3
(1) taking ultrahigh molecular weight polyethylene(UHMWPE) powder 200g, described ultrahigh molecular weight polyethylene(UHMWPE) is the M-I type product of second auxiliary factory of Beijing Orient petrochemical complex company limited, and its molecular weight is 1,500,000;
(2) taking medicinal active powdered carbon 50g, the specific surface area of described medical activated carbon is 800m2/ g;
(3) above-mentioned two kinds of powder are put into mechanical stirrer stirring within 10 minutes, mix;
(4) mixed powder is packed in tubular die, in the hydraulic pressure pressure system of 0.7MPa, at 260 DEG C of temperature, sinters 120 minutes;
(5) naturally cool to 50 DEG C then with the siloxanes uranium releasing agent demoulding, obtain filter core.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Embodiment 7
The filter core of Example 1��6 and comparative example 1��3 gained, liner two-layer nonwoven, outsourcing two-layer nonwoven, polypropylene porous net is wrapped again at skin, the bonding upper connection end cap in filter core two ends, is positioned in stainless steel or plastic casing, for the treatment of water, after testing, this filter core is good to the removal effect of the formaldehyde in water. As shown in table 1, for adopting the filter core of enforcement 1��6 and comparative example 1��3 offer to the content of the formaldehyde before and after water treatment.
The formaldehyde content that table 1 uses before and after filter core process in water, unit: mg/L
As can be seen from Table 1, the formaldehyde utilizing the filter core of the present invention to remove in water achieves good effect, and clearance is more than 98.4%, and this filter core is applicable to the needs of home terminal drinking water treatment very much.
Above filtration medium for removing formaldehyde in tap water provided by the present invention and its preparation method and the filter core that is made up of this filtration medium are described in detail. The above is only the preferred embodiment of the present invention; it is noted that for those skilled in the art, under the premise without departing from the principles of the invention; can also making some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. remove the preparation method of the filtration medium of formaldehyde in tap water for one kind, it is characterised in that, comprise the following steps:
A) by ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent mixing, obtaining mixture, the weight ratio of described ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent is 200��300:50��100:50��100:50��100:50��100; Also comprising medical stone powder, described medical stone powder is the medical stone powder through manganese modification; The weight ratio of described medical stone powder and described ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent is 50��100:200��300:50��100:50��100:50��100:50��100;
B) mixture by step a) gained is suppressed in a mold, sinters, is cooled.
2. preparation method according to claim 1, it is characterised in that, also comprise vermiculite power.
3. preparation method according to claim 2, it is characterized in that, the weight ratio of described vermiculite power and described ultrahigh molecular weight polyethylene(UHMWPE) powder, activity charcoal powder, montmorillonite powder, hydrotalcite powder and gas generation agent is 80��150:200��300:50��100:50��100:50��100:50��100.
4. the filtration medium for removing formaldehyde in tap water that preparation method according to any one of claim 1 to 3 obtains.
5. a filter core, it is characterised in that, it is made up of filtration medium according to claim 4.
6. a purifier, it is characterised in that, comprise filtration medium according to claim 4 or filter core according to claim 5.
7. a water dispenser, it is characterised in that, comprise purifier according to claim 6.
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| CN104307496B (en) * | 2014-11-07 | 2016-11-30 | 潘峰 | For removing the filter medium of Perchlorate in Drinking Water, filter element and preparation method |
| CN106731232A (en) * | 2017-01-23 | 2017-05-31 | 福建海西滤水龙头研究中心有限公司 | A kind of ion-exchange type deodorization and sterilization filtration core and preparation method thereof |
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| CN101628226A (en) * | 2008-07-15 | 2010-01-20 | 周奇迪 | Filter medium for removing pesticide in water and preparation method thereof |
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| CN101628226A (en) * | 2008-07-15 | 2010-01-20 | 周奇迪 | Filter medium for removing pesticide in water and preparation method thereof |
| CN102553352A (en) * | 2011-10-20 | 2012-07-11 | 常州亚环环保科技有限公司 | Structure filter for removing formaldehyde from drinking water and its preparation method |
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