CN103433054B - A kind of except formaldehyde composite catalyst and preparation method thereof - Google Patents
A kind of except formaldehyde composite catalyst and preparation method thereof Download PDFInfo
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- CN103433054B CN103433054B CN201310350994.5A CN201310350994A CN103433054B CN 103433054 B CN103433054 B CN 103433054B CN 201310350994 A CN201310350994 A CN 201310350994A CN 103433054 B CN103433054 B CN 103433054B
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Abstract
The present invention relates to the technical field of chemical catalyst, specifically, relate to a kind of except formaldehyde composite catalyst and preparation method thereof.Described catalyst take inert substance as carrier, is prepared from after load poly-metal deoxide.1) at few additive, the 8-12 formaldehyde doubly that exceeds standard can be reduced to below criterion of acceptability in the short time; 2) synthesis technique is simple, preparation cost relative moderate; 3) this catalyst belongs to heterogeneous reaction mechanism, and long-acting use capable of circulation, can not cause secondary pollution.Synthesis technique is simple, preparation cost relative moderate.
Description
Technical field:
The present invention relates to the technical field of chemical catalyst, specifically, relate to a kind of except formaldehyde composite catalyst and preparation method thereof.
Background technology:
After the progress of industrial technology civilization, the various indoor decorations related in life there has also been how better selection: exquisite decoration, abundant household electrical appliance, easily information products etc., these selections also often cause IAQ to be deteriorated while improving our quality of life.According to statistics, people every day on average nearly more than 80% time spend in indoor, part special population even can up to more than 93%, and therefore, IAQ just seems more important to health.
As everyone knows, when indoor decoration, inevitably create the dusty gas be much detrimental to health, as formaldehyde, benzene, toluene and some VOCs (TVOCs) etc.In numerous dusty gas, formaldehyde pollution is particularly serious, formaldehyde is as a kind of high toxic material, eyes, nasal cavity and respiratory tract can be stimulated, also can increase the possibility of cancer, teratogenesis simultaneously, show according to statistics, the formaldehyde content in indoor air of Chinese most city half family exceeds standard, so exploitation is efficiently except formaldehyde products is significant.
Method except formaldehyde in prior art mainly contains absorption method and photocatalytic method, and described absorption method exists absorption and the equilibrium problem of desorption, is particularly difficult to play adsorption effect when low concentration; Although described photocatalytic method can realize, to the degraded of pernicious gas, needing ultraviolet lighting, and producing O in UV-irradiation process
3pollute.In addition, also have a kind of efficient adsorption catalysis method seldom adopted, the filtrate of described efficient adsorption catalysis method most with noble metals such as gold, platinum and silver for catalyst substrates is synthesized, with high costs, seriously limit its application.
Summary of the invention:
The technical problem to be solved in the present invention is, provides a kind of adsoption catalysis effective, does not have secondary pollution, and lower-cost except formaldehyde composite catalyst and preparation method thereof.
For solving the problems of the technologies described above, the present invention adopts a kind of except formaldehyde composite catalyst like this, and described catalyst take inert substance as carrier, is prepared from after load poly-metal deoxide.
The present invention, has the following advantages except compared with formaldehyde composite catalyst with of the prior art: 1) at few additive, the 8-12 formaldehyde doubly that exceeds standard can be reduced to below criterion of acceptability in the short time; 2) synthesis technique is simple, preparation cost relative moderate; 3) this catalyst belongs to heterogeneous reaction mechanism, and long-acting use capable of circulation, can not cause secondary pollution.
As preferably, described inert substance is the mixture of one or more in silica, powder active carbon, active carbon short fiber, inertia ore or inertia organic polymer, and select variation, selection is simple.
As preferably another, described poly-metal deoxide is by catalytic decomposition component and auxiliary catalysis component is composite forms, and described composite coefficient is 10:1 ~ 100:1, and function is comparatively complete.
As preferably another, described catalytic decomposition component is two or more the mixture any in Mn oxide, ferriferous oxide, Cu oxide, zinc oxide, titanium oxide or silver oxide, and select variation, selection is simple.
As preferably another, described auxiliary catalysis component is any one or a few the mixture in barium oxide, nickel oxide, tungsten oxide, molybdenum oxide, cerium oxide or cobalt/cobalt oxide, and select variation, selection is simple.
As preferably another, described catalytic decomposition component is the mixture of Mn oxide, ferriferous oxide, zinc oxide and titanium oxide, and combination property is best, better effects if.
As preferably another, described auxiliary catalysis group is the mixture of one or more in barium oxide, tungsten oxide or cerium oxide, and combination property is best, better effects if.
For solving the problems of the technologies described above, the present invention adopts a kind of like this preparation method except formaldehyde composite catalyst, and it mainly comprises the following steps:
(1) preparation of carrier;
(2) prepare high-valence state metal oxide and saline solution thereof, and it is mixed with carrier;
(3) lower valency metal oxide and saline solution and alkaline solution is prepared;
(4) by step 3 at a middle or low price state metal oxide and saline solution and alkaline solution all dropwise add in the mixed liquor after step 2, the pH value of mixed liquor is adjusted to 8 and namely stops, leave standstill, suction filtration, obtains the presoma of composite catalyst;
(5) presoma of composite catalyst is fully dried, roasting in Muffle furnace;
(6) finished product.
As preferably, described carrier is the mixture of one or more in silica, powder active carbon, active carbon short fiber, inertia ore or inertia organic polymer, and select variation, selection is simple.
As preferably another, in step 5, bake out temperature is 80 ~ 150 degrees Celsius, and the sintering temperature of described Muffle furnace is 300 ~ 500 degrees Celsius, and roasting time is 2 ~ 5 hours, and cost is lower, and efficiency is higher, ageing good.
The present invention, compared with the preparation method removing formaldehyde composite catalyst of the prior art, has the following advantages: synthesis technique is simple, preparation cost relative moderate.
Detailed description of the invention:
Below in conjunction with specific embodiment, the invention will be further described:
One of the present invention is except formaldehyde composite catalyst, described catalyst take inert substance as carrier, be prepared from after load poly-metal deoxide, in detail, described inert substance is silica, powder active carbon, active carbon short fiber, the mixture of one or more in inertia ore or inertia organic polymer, described poly-metal deoxide is by catalytic decomposition component and auxiliary catalysis component is composite forms, described composite coefficient is 10:1 ~ 100:1, wherein, described catalytic decomposition component is Mn oxide, ferriferous oxide, Cu oxide, zinc oxide, two or more mixture any in titanium oxide or silver oxide.Described auxiliary catalysis component is any one or a few the mixture in barium oxide, nickel oxide, tungsten oxide, molybdenum oxide, cerium oxide or cobalt/cobalt oxide, say further, best catalytic decomposition component is the mixture of Mn oxide, ferriferous oxide, zinc oxide and titanium oxide, and the auxiliary catalysis group of the best is the mixture of one or more in barium oxide, tungsten oxide or cerium oxide.Composite catalyst except the method for testing of formaldehyde performance be the calibration curve that carries out of reference standard GB/T18204.26-2000 " public place method for determining formaldehyde in air " and coefficient calculations, concrete test experiments correction data is as follows:
Embodiment one
Described carrier is inertia silica, and described poly-metal deoxide is that Mn oxide, ferriferous oxide, zinc oxide, titanium oxide, barium oxide, cerium oxide are by the composite mixture obtained.
1. the preparation of inertia silica supports solution:
The distilled water of the ethyl orthosilicate of 2 parts, the ethanol of 5 parts, the nitric acid of 0.2 part and 0.5 part is poured into manual stir about in special liquid dispensing container transferred in reaction pot by mixed liquor after 5 minutes at once, and slow turn on agitator, stirs 60 minutes; Again weigh 20 parts of ethanol to mix with 0.2 part of nitric acid, and to transfer to rapidly in reaction pot, again slowly start agitator, and open thermostatted water system reaction pot is heated, maintain the temperature at 40 DEG C, react 150 minutes; React rear stopping heating, and constantly stirred, be cooled to room temperature, namely obtain inertia silica supports solution.
2. the preparation of high-valence state metal oxide and salt and carrier mixed solution:
By 40 parts of potassium permanganate, the ferric sulfate of 10 parts, the titanium dioxide of 0.1 part, after the zinc carbonate of 0.5 part and 2 parts of ammonium metavanadates mix with the ammonium ceric nitrate of 15 parts, add water according to the ratio of 1:30 and be configured to solution, and add the salpeter solution acidifying of 1%, fully stir, after solution-stabilized, inertia silica supports solution slowly added and is stirred to evenly.
3. the preparation of lower valency metal oxide and saline solution and alkaline solution:
The manganese nitrate of 80 parts is mixed with the aqueous solution that mass fraction is 50%; By 25 parts of potassium hydroxide, be mixed with alkaline aqueous solution according to 1:10.
4. the presoma of multimetallic catalytic composite and the preparation of finished product:
The manganese nitrate solution prepared and sodium hydroxide solution is dropwise added in mixed solution, solution is adjusted to neutrality (PH is 7), leave standstill, suction filtration, obtain the presoma of composite catalyst, presoma is fully dried under 120 DEG C of conditions, roasting 5 hours in the Muffle furnace of 300 DEG C afterwards, namely obtain the poly-metal deoxide composite catalyst containing carrier.
Embodiment two
Described carrier is powder active carbon, and described poly-metal deoxide is that Mn oxide, ferriferous oxide, zinc oxide, titanium oxide, barium oxide, cerium oxide are by the composite mixture obtained.
1. the preparation of powder active high-area carbon suspension:
Get 20g specific area>=1000m
2/ g, granularity are the beaker that the coconut activated carbon dust of 300 object puts into 1000ml, and add 800ml distilled water, mechanical agitation is after 0.5 hour, 0.5 hour is disperseed again with ultrasonic wave, so 5 times repeatedly, uniform and stable to suspension, namely obtain powder active high-area carbon suspension.
2. the preparation of high-valence state metal oxide and salt and carrier mixed solution:
By 40 parts of potassium permanganate, the ferric nitrate of 15 parts, the titanium dioxide of 0.2 part, after the zinc carbonate of 0.1 part and 3 parts of ammonium metavanadates mix with the ammonium paratungstate of 5 parts, become the aqueous solution according to the proportional arrangement of 1:50, and add the salpeter solution acidifying of 0.1%, fully stir, after solution-stabilized, inertia silica supports solution slowly added and is stirred to evenly.
3. the preparation of lower valency metal oxide and saline solution and alkaline solution:
The manganese nitrate of 90 parts is mixed with the aqueous solution that mass fraction is 20%; By 20 parts of NaOH, be mixed with alkaline aqueous solution according to 1:15.
4. the presoma of multimetallic catalytic composite and the preparation of finished product:
The manganese nitrate solution prepared and sodium hydroxide solution is dropwise added in mixed solution, after solution being adjusted to neutrality (PH is 7), leave standstill, suction filtration, obtain the presoma of composite catalyst, presoma is fully dried under 80 DEG C of conditions, roasting 2 hours in the Muffle furnace of 500 DEG C afterwards, namely obtain the poly-metal deoxide composite catalyst containing carrier.
Claims (3)
1., except a preparation method for formaldehyde composite catalyst, it is characterized in that, it mainly comprises the following steps:
Step 1, the preparation of inertia silica supports solution;
Step 2, by 40 parts of potassium permanganate, the ferric sulfate of 10 parts, the titanium dioxide of 0.1 part, after the zinc carbonate of 0.5 part and 2 parts of ammonium metavanadates mix with the ammonium ceric nitrate of 15 parts, add water according to the ratio of 1:30 and be configured to solution, and add the salpeter solution acidifying of 1%, then mix with inertia silica supports solution;
Step 3, is mixed with the manganese nitrate of 80 parts the aqueous solution that mass fraction is 50%; By 25 parts of potassium hydroxide, be mixed with alkaline aqueous solution according to 1:10;
Step 4, adds the manganese nitrate solution and sodium hydroxide solution that prepare in mixed solution, and solution being adjusted to neutral pH is 7, and leave standstill, suction filtration, obtains the presoma of composite catalyst;
Step 5, fully dries the presoma of composite catalyst, roasting in Muffle furnace;
Step 6, finished product.
2., except a preparation method for formaldehyde composite catalyst, it is characterized in that, it mainly comprises the following steps:
Step 1, the preparation of powder active high-area carbon suspension;
Step 2, by 40 parts of potassium permanganate, the ferric nitrate of 15 parts, the titanium dioxide of 0.2 part, after the zinc carbonate of 0.1 part and 3 parts of ammonium metavanadates mix with the ammonium paratungstate of 5 parts, become the aqueous solution according to the proportional arrangement of 1:50, and add the salpeter solution acidifying of 0.1%, then mix with powder active high-area carbon suspension;
Step 3, is mixed with the manganese nitrate of 90 parts the aqueous solution that mass fraction is 20%; By 20 parts of NaOH, be mixed with alkaline aqueous solution according to 1:15;
Step 4, adds the manganese nitrate solution and sodium hydroxide solution that prepare in mixed solution, and solution being adjusted to neutral pH is 7, and leave standstill, suction filtration, obtains the presoma of composite catalyst;
Step 5, fully dries the presoma of composite catalyst, roasting in Muffle furnace;
Step 6, finished product.
3., according to a kind of preparation method except formaldehyde composite catalyst in claim 1 or 2, it is characterized in that, in step 5, bake out temperature is 80 ~ 150 degrees Celsius, and the sintering temperature of described Muffle furnace is 300 ~ 500 degrees Celsius, and roasting time is 2 ~ 5 hours.
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104190386B (en) * | 2014-08-19 | 2016-03-02 | 桐乡市健民过滤材料有限公司 | Spherical filtrate and preparation method thereof |
| CN105478134B (en) * | 2014-09-19 | 2017-12-29 | 合众（佛山）化工有限公司 | A kind of applicability loaded catalyst for purifying air at normal temperatures |
| CN104353417B (en) * | 2014-11-06 | 2016-08-17 | 山西新华化工有限责任公司 | Remove formaldehyde activity charcoal |
| CN104324732B (en) * | 2014-11-06 | 2016-08-17 | 山西新华化工有限责任公司 | Remove the preparation method of formaldehyde activity charcoal |
| CN105080615A (en) * | 2015-07-29 | 2015-11-25 | 安徽科浦环保科技有限公司 | Adsorption catalyst capable of removing formaldehyde quickly and preparing method thereof |
| CN105126842A (en) * | 2015-07-29 | 2015-12-09 | 安徽科浦环保科技有限公司 | Preparation method of formaldehyde-eliminating adsorption catalyst |
| CN106238065B (en) * | 2016-07-08 | 2018-10-16 | 宁波钛安新材料科技有限公司 | A kind of composite catalyst and preparation method thereof of catalysis Formaldehyde decomposition |
| CN106622260B (en) * | 2016-12-09 | 2019-06-18 | 湖北工业大学 | A kind of preparation method and application handling low concentration formaldehyde waste water catalyst |
| CN108837606A (en) * | 2018-06-07 | 2018-11-20 | 广东美的环境电器制造有限公司 | Air purification filter core and preparation method thereof |
| CN111514883A (en) * | 2019-08-30 | 2020-08-11 | 南京林业大学 | Preparation method of carbon-based catalyst for indoor air purification |
| CN112516785A (en) * | 2019-09-18 | 2021-03-19 | 无锡风正科技有限公司 | Preparation method of industrial TVOC (total volatile organic compound) removing filter material |
| CN110560051A (en) * | 2019-09-26 | 2019-12-13 | 塞文科技(上海)有限公司 | Titanium dioxide modified activated carbon supported silver monatomic catalyst and application thereof in formaldehyde oxidation |
| CN112473666A (en) * | 2020-11-17 | 2021-03-12 | 上海应用技术大学 | Catalyst for low-temperature catalytic oxidation of formaldehyde and preparation method and application thereof |
| CN113441152A (en) * | 2021-07-02 | 2021-09-28 | 珠海格力电器股份有限公司 | Catalyst and preparation method thereof |
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