CN108745344A - A kind of preparation method of manganese dioxide-catalyst - Google Patents
A kind of preparation method of manganese dioxide-catalyst Download PDFInfo
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- CN108745344A CN108745344A CN201810550199.3A CN201810550199A CN108745344A CN 108745344 A CN108745344 A CN 108745344A CN 201810550199 A CN201810550199 A CN 201810550199A CN 108745344 A CN108745344 A CN 108745344A
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- Prior art keywords
- manganese dioxide
- preparation
- catalyst
- solution
- manganese
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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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/32—Manganese, technetium or rhenium
- B01J23/34—Manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8671—Removing components of defined structure not provided for in B01D53/8603 - B01D53/8668
- B01D53/8675—Ozone
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
- C01G45/02—Oxides; Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/2073—Manganese
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The present invention relates to a kind of preparation methods of manganese dioxide-catalyst.A kind of preparation method of manganese-based catalyst, includes the following steps, step 1, by manganese salt dissolving with suitable quantity of water, is then added suitable (NH4)2S2O8,Then it is stirred at room temperature；The solution that step 1 obtains is transferred in closed container, then heats by step 2；Step 3, the solution that step 2 is obtained, is washed using deionized water, is then filtered, obtain the solid of manganese dioxide repeatedly；Then step 4 step 3 acquisition solid is dried；Then step 5 roasts step 4 acquisition solid, to obtain manganese dioxide crystal.Preparation method of the present invention is simple for process, step is few and easy to operate, and the prepared out manganese-based catalyst of the preparation method can efficiently remove, decompose aerial ozone, decomposition efficiency is high.
Description
Technical field
The present invention relates to a kind of catalyst technical field, specifically a kind of preparation method of manganese dioxide-catalyst.
Background technology
Ozone is a kind of minimum gas in earth atmosphere, it is since oxygen molecule is resolved into oxygen original by solar radiation in air
After son, oxygen atom again with the oxygen molecule of surrounding combine and formed, contain 3 oxygen atoms.90% or more ozone exists in air
In the top of atmosphere or stratosphere, there are 10~50 kms from the ground, this is only the atmospheric ozone layer for needing the mankind to protect.Also
Least a portion of ozone molecule is hovered near the ground, remains to have certain effect to blocking ultraviolet light.But some experts have found ground
Ozone concentration in neighbouring air has the tendency that quickly increasing, and just makes us smelling a rat.Although ozone is played in stratosphere
Protect the mankind and environment important function, if but its troposphere concentration increase, can to health generate adverse effect.It is smelly
Oxygen has stimulation to eyes and respiratory tract, also has an impact to lung function, and the ozone of higher concentration is also harmful to plant.Cause
This, how the ozone of fast decoupled higher concentration, mankind's urgent problem.In the prior art, from gas ozoniferous
In, for example, in air remove ozone method it is very much, including（1）It uses up or the method for thermal release ozone;（2）Use chemical solution
Liquid, for example, sodium sulphate aqueous slkali method;（3）Using separating catalyst, for example, the mixture of activated carbon, activated carbon and silica gel
And common zeolite and metal oxide.In the above-mentioned methods,（4）It is most common, but is easy to generation using activated carbon
One problem is that carbon and ozone reaction generate carbon monoxide and carbon dioxide.（5）Metal oxide can also be used as separation
Catalyst can make the metal of ozone decomposed very much, among some noble metals and divalent metal belong to such, such as platinum, and rhodium, palladium, cobalt,
Lithium, copper, manganese, aluminium, iron etc..In British patent 2,037,605, GB-2,056,424, GB2,089,671, GB2,142,324, and
United States Patent (USP) US-4 is described using metal oxide as separation in 173,549, US-4,262,863, US-4,459,269
Catalyst removes the example of ozone, and above-mentioned document is incorporated herein by reference.They are exactly with gold there are one common feature
Belong to or metal oxide be made paste do it is clean form, or formed as carrier with aluminium oxide, to improve ozone decomposition ability, be added
Precious metal or metal oxide, their existing common issues are exactly that cost is too high, and makes complicated.
Invention content
In order to overcome the complex manufacturing technology of metal oxide that current catalysis ozone decomposes, the deficiencies of cost of manufacture is high,
The present invention provides a kind of preparation method of manganese dioxide-catalyst, the preparation method is simple for process, step is easy, the preparation side
The prepared out manganese dioxide-catalyst of method, can efficiently remove, decompose aerial ozone, decomposition efficiency is high.
The object of the present invention is achieved like this：
A kind of preparation method of manganese dioxide-catalyst, it is characterised in that：Include the following steps, step 1, by manganese salt dissolving with
In suitable quantity of water, then it is added suitable (NH4)2S2O8,Then it is stirred at room temperature.
The solution that step 1 obtains is transferred in closed container, then heats by step 2；
Step 3, the solution that step 2 is obtained, is washed using deionized water, is then filtered, obtain consolidating for manganese dioxide repeatedly
State object.
Then step 4 step 3 acquisition solid is dried.
Then step 5 roasts step 4 acquisition solid, to obtain manganese dioxide crystal.
The present invention can also improve further below.
The closed container is hydrothermal reaction kettle.
In step 3, the solution that step 2 is obtained is washed repeatedly using deionized water, until value=7 ph of solution, so
After refilter.
In step 1, mixing time is -2 hours 0.5 hour.
In step 3, heating temperature is 80 ° -100 °, and heating time is -24 hours 12 hours
In step 4, drying temperature is 90 ° -150 °.
In step 5, calcination temperature is 250 ° -350 °.
Decomposition of the manganese dioxide-catalyst for catalysis ozone at ambient temperature.
Beneficial effects of the present invention are as follows：
（One）Preparation method of the present invention is simple for process, step is few and easy to operate, the prepared out manganese dioxide of the preparation method
Catalyst can efficiently remove, decompose aerial ozone, and decomposition efficiency is high.
（Two）More have plenty of, preparation method of the present invention can prepare the manganese dioxide crystal of R types.
Specific implementation mode
With reference to embodiment, the invention will be further described.
Embodiment one, a kind of preparation method of manganese dioxide-catalyst include the following steps, step 1 dissolves manganese salt
With in suitable quantity of water, be then added suitable (NH4)2S2O8,Then it is stirred at room temperature.
The solution that step 1 obtains is transferred in closed container, then heats by step 2；
Step 3, the solution that step 2 is obtained, is washed using deionized water, is then filtered, obtain consolidating for manganese dioxide repeatedly
State object.
Then step 4 step 3 acquisition solid is dried.
Then step 5 roasts step 4 acquisition solid, to obtain manganese dioxide crystal.
As the more specific technical solution of the present invention.
The closed container is hydrothermal reaction kettle.
In step 3, the solution that step 2 is obtained is washed repeatedly using deionized water, until value=7 ph of solution, so
After refilter.
In step 1, mixing time is -2 hours 0.5 hour.
In step 3, heating temperature is 80 ° -100 °, and heating time is -24 hours 12 hours
In step 4, drying temperature is 90 ° -150 °.
In step 5, calcination temperature is 250 ° -350 °.
The manganese dioxide-catalyst is the decomposition for catalysis ozone at ambient temperature.According to the method for the present invention, skill
Art personnel can produce the manganese dioxide crystal of a variety of r type crystal structures,
The catalytic effect such as following table of the manganese dioxide of different r type crystal structures prepared by the method for the present invention：
Claims (7)
1. a kind of preparation method of manganese dioxide-catalyst, it is characterised in that：Include the following steps, step 1 dissolves manganese salt
With in suitable quantity of water, be then added suitable (NH4)2S2O8,Then it is stirred at room temperature；
The solution that step 1 obtains is transferred in closed container, then heats by step 2；
Step 3, the solution that step 2 is obtained, is washed using deionized water, is then filtered, obtain consolidating for manganese dioxide repeatedly
State object；
Then step 4 step 3 acquisition solid is dried；
Then step 5 roasts step 4 acquisition solid, to obtain manganese dioxide crystal.
2. the preparation method of manganese dioxide-catalyst according to claim 1, it is characterised in that：The closed container is water
Thermal response kettle.
3. the preparation method of manganese dioxide-catalyst according to claim 1, it is characterised in that：In step 3, by step 2
The solution of acquisition is washed repeatedly using deionized water, until value=7 ph of solution, then refilter.
4. the preparation method of manganese dioxide-catalyst according to claim 1, it is characterised in that：In step 1, when stirring
Between be -2 hours 0.5 hour.
5. the preparation method of manganese dioxide-catalyst according to claim 1, it is characterised in that：In step 3, heating temperature
Degree is 80 ° -100 °, and heating time is -24 hours 12 hours.
6. the preparation method of manganese dioxide-catalyst according to claim 1, it is characterised in that：In step 4, dry temperature
Degree is 90 ° -150 °.
7. the preparation method of manganese dioxide-catalyst according to claim 1, it is characterised in that：
In step 5, calcination temperature is 250 ° -350 °.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1785507A (en) * | 2005-11-22 | 2006-06-14 | 天津化工研究设计院 | Ozone decomposition catalyst and its preparation method |
| CN102600861A (en) * | 2012-03-26 | 2012-07-25 | 中国科学院生态环境研究中心 | Manganese-based composite oxide catalyst for catalytically decomposing ozone, and preparation method of manganese-based composite oxide catalyst |
| CN105013322A (en) * | 2015-06-25 | 2015-11-04 | 中国科学院生态环境研究中心 | Use of manganite catalyst in catalytic oxidation of formaldehyde |
-
2018
- 2018-05-31 CN CN201810550199.3A patent/CN108745344A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1785507A (en) * | 2005-11-22 | 2006-06-14 | 天津化工研究设计院 | Ozone decomposition catalyst and its preparation method |
| CN102600861A (en) * | 2012-03-26 | 2012-07-25 | 中国科学院生态环境研究中心 | Manganese-based composite oxide catalyst for catalytically decomposing ozone, and preparation method of manganese-based composite oxide catalyst |
| CN105013322A (en) * | 2015-06-25 | 2015-11-04 | 中国科学院生态环境研究中心 | Use of manganite catalyst in catalytic oxidation of formaldehyde |
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