CN109499280A - A kind of deoxidation drying agent and preparation method thereof - Google Patents
A kind of deoxidation drying agent and preparation method thereof Download PDFInfo
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- B01D53/26—Drying gases or vapours
- B01D53/28—Selection of materials for use as drying agents
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- B01D53/261—Drying gases or vapours by adsorption
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Abstract
The invention belongs to desiccant technical fields, it more particularly to a kind of deoxidation drying agent and preparation method thereof, is made of the raw material of following portions by weight: 5-8 parts of active carbon, 6-10 parts of anhydrous calcium chloride, 15-25 parts of Concave-convex clay rod, red 20-30 parts of bentonite, 20-25 parts of bauxite, 35-45 parts of iron series deoxidizers, 6-10 parts of microcrystalline cellulose, 5-10 parts of silicon powder；Deoxidation drying agent of the present invention has hydroscopicity high, and simple process is pollution-free, and deoxidation effect is significant, lasting wettability power, and after deoxidation moisture absorption, deoxidation drying agent water holding capacity is strong, and no sepage phenomenon occurs.
Description
Technical field
The invention belongs to desiccant technical fields, and in particular to a kind of deoxidation drying agent and preparation method thereof.
Background technique
Desiccant is using its preferable dehumidifying effect come the moisture in adsorbing medium, keep indoor or article be packaged in compared with
It is dry in long-time, to achieve the purpose that dry, moisture-proof and mould proof；According to suction type difference, desiccant is divided into physics suction
Attached desiccant and chemisorption desiccant；The desiccant of physical absorption has silica-gel desiccant, alumina gel, molecular sieve dry
Agent, acticarbon, adsorbent charcoal, fiber adsorbing substance and mineral agent etc., their dehumidification principle are big using it
Specific surface area and microcellular structure absorption humid air in moisture and locked in the structure of itself；The common of chemisorption is done
Drying prescription has calcium chloride drier, quick lime in drying prescription, phosphorus pentoxide desiccant, silicic acid desiccant etc., their dehumidification principle
It is to be turned into another substance with moisture generation chemical action in humid air to lock moisture using it.
The single raw material drying agent that tradition uses, can be full because their own design feature shows respective moisture pick-up properties
The moisture-proof purpose of the dehumidifying in some fields of foot, but also all there are some disadvantages；The shared disadvantage of conventional dry drying prescription is moisture absorption
It measures low, only can be suitably used for lower or less high to the drying condition requirement field of humidity, and water retention is low, the feelings of sepage easily occurs
Condition；At present market using it is more be exactly silica-gel desiccant, molecular sieve desiccant, silica-gel desiccant is usually to use sodium metasilicate and sulphur
Acid reaction, and be made through a series for the treatment of processes such as aging, acid bubbles, raw materials for production are dangerous material, and process is more complicated；Molecule
Sieve desiccant is the desiccant product that the artificial synthesized several pairs of hydrones of one kind have stronger adsorptivity, belongs to crystalline aluminosilicate chemical combination
Object has regular and uniform duct in product body structure, and aperture is the order of magnitude of molecular size, but its preparation process is more multiple
Miscellaneous, using effect is also restricted.
Summary of the invention
In response to the problems existing in the prior art, the purpose of the present invention is to provide a kind of deoxidation drying agent and preparation method thereof,
The deoxidation drying agent finally obtained has hydroscopicity high, and simple process is pollution-free, and deoxidation effect is significant, lasting wettability power,
And after deoxidation moisture absorption, deoxidation drying agent occurs without sepage phenomenon.
To achieve the above object, the technical solution adopted by the present invention is that:
A kind of deoxidation drying agent is made of the raw material of following portions by weight: 5-8 parts of active carbon, 6-10 parts of anhydrous calcium chloride, bumps
15-25 parts of stick stone clay, red 20-30 parts of bentonite, 20-25 parts of bauxite, 35-45 parts of iron series deoxidizers, microcrystalline cellulose
6-10 parts, 5-10 parts of silicon powder.
Preferably, red bentonite internal oxidition aluminium content >=12%, iron oxide content >=15%；Bauxite internal oxidition
Aluminium content is >=60%, Concave-convex clay rod internal oxidition aluminium content >=8%, calcium oxide content >=25%, content of magnesia >=14%；It is recessed
After dilute sulfuric acid is handled, the structure channel charge imbalance of product causes to adsorb for convex stick stone clay, red bentonite, bauxite
Center increases, to enhance its adsorption effect, moreover, acidification also eliminates Concave-convex clay rod, red swelling
Impurity in soil, bauxite, increases original specific surface area, so that desiccant absorption property is improved, the product tool of generation
There is more highly hygroscopic effect；
Preferably, the silicon powder partial size is 0.02mm-0.04mm;Silicon powder is a kind of nontoxic, inaction, free of contamination nothing
Machine material, and the advantages of possess low bulk, hardness big, stable chemical performance, after desiccant absorbs moisture, silicon powder is not had
Space deformation, therefore will not influence the deoxidation drying capacity of deoxidation drying agent；
Preferably, the iron series deoxidizers is is iron oxide under 750 DEG C of -850 DEG C of hot conditions, by restoring with hydrogen
Reaction is prepared, and 92%-95% is ferrous metal in the iron series deoxidizers being prepared, and most of other is ferrous oxide；Iron series
Deoxidier is placed in air, and oxidation reaction is easy to happen, and is the most widely used at present de- since it is green, pollution-free
Oxygen material, in the status of criterion, there is a situation where when any other reaction, 1 gram of iron series deoxidizers about can be free with 300mL
Oxygen occur oxidation reaction, that is to say, that 1 gram of iron series deoxidizers about can remove the oxygen in about 1500mL air, deoxygenation
Effect is relatively preferable, and cost is relatively low；
Preferably, the active carbon have more micropore matter structures, molecule it is fine and closely woven it is porous, quality is hard, possess certain suction
Attached ability can enhance the wettability power of desiccant；
The present invention also provides a kind of deoxidation drying agent preparation methods, and steps are as follows:
1) Concave-convex clay rod, red bentonite, bauxite are added in pulverizer, after pulverization process, mixture crosses 200 mesh point
Smashed Concave-convex clay rod, red bentonite, bauxite powder are added sulfuric acid and carry out acidification by son sieve, acidified
Cheng Zhong, dilution heat of sulfuric acid preparation used are made of following component by weight percentage: the sulfuric acid 5%-15% and water of concentration 98%
85%-95%, ingredient used are made of following component by weight percentage: Concave-convex clay rod, red bentonite, bauxite powder
60%-70% and dilution heat of sulfuric acid 30%-40%, after acidification, adds it in blender, mixing time 1h-3h, stirring speed
Degree is 200r/min-300r/min, after the completion of stirring, places it under the conditions of temperature is 80 DEG C, stands 3h, mixed by what is obtained
Object is closed, is filtered under the action of negative pressure of vacuum is 0.07MPa with vacuum filter, the filter cake that retention obtains is put into flowing
Deionized water in wash, the filter cake after washing is added in muffle furnace and calcines, crushing is added into after calcining to PH=7 by washing
In machine, pulverization process obtains mixture A；
2) mixture A, active carbon, anhydrous calcium chloride, iron series deoxidizers, silicon powder, microcrystalline cellulose are added to vacuum reaction
It in kettle, under vacuum conditions, at the uniform velocity stirs, mixing time 2h-3h, mixing speed 300r/min-500r/min, thus anti-
Only iron series deoxidizers aoxidizes under non-vacuum condition, while realizing each uniform purpose of feed distribution by stirring, and stirring is completed
Afterwards, deoxidation drying agent is obtained.
The beneficial effects of the present invention are:
1) anhydrous calcium chloride possesses stronger water absorbing capacity, and calcium chloride and Concave-convex clay rod, red bentonite, bauxite with
And active carbon possesses synergistic effect, water absorbing capacity is far superior to its single water absorbing capacity.
2) microcrystalline cellulose is added in desiccant, since microcrystalline cellulose is known as the presence of hydrogen bond, therefore microcrystalline cellulose possesses
Stronger water holding capacity, to the case where sepage occur after avoiding desiccant from absorbing moisture.
3) iron series deoxidizers possesses the ability of deoxidation, but single iron series deoxidizers is easily oxidized, so as to cause deoxidation
Effect is undesirable, when iron series deoxidizers is jointly processed by with active carbon, Concave-convex clay rod, red bentonite, bauxite, activity
Charcoal, Concave-convex clay rod, red bentonite, bauxite have certain protection to iron series deoxidizers, to avoid iron series deoxidizers
Deoxidation effect is undesirable.
4) without generating waste water in acidization of the present invention, simple process is pollution-free, can significantly increase the de- of desiccant
Oxygen drying effect, and the desiccant has lasting wettability power, and after deoxidation moisture absorption, desiccant will not become because of water suction
Shape does not have the phenomenon that sepage yet.
Detailed description of the invention
Fig. 1 is a kind of deoxidation drying agent preparation flow schematic diagram.
Fig. 2 is nanocrystal cellulose TEM figure.
Specific embodiment
It to facilitate the understanding of the present invention, below will be to invention is more fully described；But the present invention can be to be permitted
Mostly different form is realized, however it is not limited to embodiment described herein；On the contrary, purpose of providing these embodiments is makes
It is more thorough and comprehensive to the understanding of the disclosure.
Embodiment 1-10
A kind of deoxidation drying agent is made of the raw material of following portions by weight: active carbon, the constant weight score of constant weight score
Anhydrous calcium chloride, the Concave-convex clay rod of constant weight score, the red bentonite of constant weight score, constant weight score
Bauxite, the iron series deoxidizers of constant weight score, the microcrystalline cellulose of constant weight score, the silicon of constant weight score it is micro-
Powder.
Preferably, red bentonite internal oxidition aluminium content >=12%, iron oxide content >=15%；Bauxite internal oxidition
Aluminium content is >=60%, Concave-convex clay rod internal oxidition aluminium content >=8%, calcium oxide content >=25%, content of magnesia >=14%；It is recessed
After dilute sulfuric acid is handled, the structure channel charge imbalance of product causes to adsorb for convex stick stone clay, red bentonite, bauxite
Center increases, to enhance its adsorption effect, moreover, acidification also eliminates Concave-convex clay rod, red swelling
Impurity in soil, bauxite, increases original specific surface area, so that desiccant absorption property is improved, the product tool of generation
There is more highly hygroscopic effect；
Preferably, the silicon powder partial size is 0.02mm-0.04mm;Silicon powder possesses that low bulk, hardness is big, chemical property
Stable advantage, after desiccant absorbs moisture, silicon powder will not have space deformation, therefore will not influence the de- of deoxidation drying agent
Oxygen drying capacity；
Preferably, the iron series deoxidizers is is iron oxide under 750 DEG C of -850 DEG C of hot conditions, by restoring with hydrogen
Reaction is prepared, and 92%-95% is ferrous metal in the iron series deoxidizers being prepared, and most of other is ferrous oxide；Iron series
Deoxidier is placed in air, and oxidation reaction is easy to happen, and is the most widely used at present de- since it is green, pollution-free
Oxygen material, in the status of criterion, there is a situation where when any other reaction, 1 gram of iron series deoxidizers about can be free with 300mL
Oxygen occur oxidation reaction, that is to say, that 1 gram of iron series deoxidizers about can remove the oxygen in about 1500mL air, deoxygenation
Effect is relatively preferable, and cost is relatively low；
Preferably, the active carbon have more micropore matter structures, molecule it is fine and closely woven it is porous, quality is hard, possess certain suction
Attached ability can enhance the wettability power of desiccant；
A kind of composition of deoxidation drying agent is as shown in table 1 in embodiment 1-10, and the corresponding numerical value of raw material is used in the raw material in table 1
Parts by weight.
The parts by weight of 1 raw material of table composition
| Material name | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 | Embodiment 9 | Embodiment 10 |
| Active carbon | 5 | 7 | 6 | 7 | 8 | 5 | 6 | 6 | 8 | 7 |
| Anhydrous calcium chloride | 6 | 9 | 10 | 8 | 8 | 7 | 6 | 7 | 9 | 9 |
| Concave-convex clay rod | 18 | 17 | 15 | 19 | 25 | 16 | 22 | 23 | 21 | 20 |
| Red bentonite | 20 | 21 | 26 | 25 | 24 | 26 | 28 | 30 | 27 | 29 |
| Bauxite | 25 | 25 | 24 | 23 | 23 | 24 | 22 | 20 | 21 | 22 |
| Iron series deoxidizers | 40 | 35 | 38 | 41 | 37 | 36 | 39 | 42 | 43 | 37 |
| Microcrystalline cellulose | 6 | 10 | 9 | 8 | 8 | 7 | 9 | 10 | 6 | 7 |
| Silicon powder | 8 | 5 | 10 | 7 | 8 | 5 | 6 | 9 | 10 | 8 |
When prepared by embodiment 1-10 deoxidation drying agent, raw material, a kind of deoxidation are weighed according to parts by weight used in each raw material in table 1
Desiccant preparation method, steps are as follows:
1) Concave-convex clay rod, red bentonite, bauxite are added in pulverizer, after pulverization process, mixture crosses 200 mesh point
Smashed Concave-convex clay rod, red bentonite, bauxite powder are added sulfuric acid and carry out acidification by son sieve, acidified
Cheng Zhong, dilution heat of sulfuric acid used are prepared and be made of following component: the sulfuric acid and water that concentration is 98%, ingredient used is by following group
Be grouped as: Concave-convex clay rod, red bentonite, bauxite powder and dilution heat of sulfuric acid after acidification, add it to stirring
In machine, start to stir, after the completion of stirring, place it in temperature be 80 DEG C under the conditions of, stand 3h, the mixture that will be obtained, use
Vacuum filter is filtered under the action of negative pressure of vacuum is 0.07MPa, by the obtained filter cake of retention be put into flowing go from
It being washed in sub- water, the filter cake after washing is added in muffle furnace and calcines, is added into pulverizer after calcining by washing to PH=7,
Pulverization process obtains mixture A；
2) mixture A, active carbon, anhydrous calcium chloride, iron series deoxidizers, silicon powder, microcrystalline cellulose are added to vacuum reaction
In kettle, under the conditions of vacuum, certain mixing time, certain mixing speed, at the uniform velocity stir, to prevent iron series deoxidizers non-real
It is aoxidized under empty condition, while each uniform purpose of feed distribution is realized by stirring, after the completion of stirring, obtain deoxidation drying agent；
Wherein, when prepared by embodiment 1-10 deoxidation drying agent, step 1) acidization, in dilute sulfuric acid shared by the sulfuric acid of concentration 98%
In ingredient used in weight percent A%, acidification after weight percent B%, acidification shared by dilution heat of sulfuric acid, mixing time Ch is stirred
Mixing speed is Dr/min, mixing time Eh, mixing speed Fr/ min in step 2 at the uniform velocity whipping process.
See Table 2 for details for specific each step relevant parameter.
Each step relevant parameter of table 2
| Embodiment | A% | B% | Ch | Dr/min | Eh | Fr/min |
| Embodiment 1 | 5 | 30 | 2.2 | 210 | 2.2 | 300 |
| Embodiment 2 | 8 | 32 | 1 | 230 | 2 | 450 |
| Embodiment 3 | 9 | 35 | 1.5 | 270 | 2.1 | 390 |
| Embodiment 4 | 8 | 36 | 2.5 | 250 | 2.9 | 400 |
| Embodiment 5 | 11 | 35 | 1.8 | 240 | 2.7 | 380 |
| Embodiment 6 | 10 | 34 | 2.3 | 240 | 2.6 | 420 |
| Embodiment 7 | 13 | 38 | 1.7 | 210 | 2.5 | 350 |
| Embodiment 8 | 12 | 37 | 3 | 200 | 2.4 | 380 |
| Embodiment 9 | 15 | 36 | 2.6 | 240 | 3 | 500 |
| Embodiment 10 | 14 | 40 | 2.4 | 300 | 2.3 | 440 |
Comparative example 1
The present embodiment provides a kind of deoxidation drying agent (based on parts by weight), compared with Example 1, the difference is that, activity
4 parts of charcoal, anhydrous calcium chloride 5,13 parts of Concave-convex clay rod, red 18 parts of bentonite, 18 parts of bauxite, 27 parts of iron series deoxidizers,
5 parts of microcrystalline cellulose, 4 parts of silicon powder, remaining is same as Example 1.
Comparative example 2
The present embodiment provides a kind of deoxidation drying agent (based on parts by weight), compared with Example 1, the difference is that, it is concave-convex
18 parts of stick stone clay, red 20 parts of bentonite, 25 parts of bauxite be substituted for 63 parts of single red bentonite, remaining and embodiment
1 is identical.
Comparative example 3
The present embodiment provides a kind of deoxidation drying agent (based on parts by weight), compared with Example 1, the difference is that, deoxidation
Microcrystalline cellulose is not added in desiccant, remaining is same as Example 1.
Comparative example 4
The present embodiment provides a kind of deoxidation drying agent preparation methods, and steps are as follows:
1) Concave-convex clay rod, red bentonite, bauxite are added in pulverizer, after pulverization process, mixture crosses 200 mesh point
Smashed Concave-convex clay rod, red bentonite, bauxite powder are added sulfuric acid and carry out acidification by son sieve, acidified
Cheng Zhong, dilution heat of sulfuric acid preparation used are made of following component by weight percentage: the sulfuric acid 3% and water 97% of concentration 98%, institute
It is made of by weight percentage following component with ingredient: Concave-convex clay rod, red bentonite, bauxite powder 55% and dilute
Sulfuric acid solution 45% after acidification, adds it in blender, mixing time 0.5h, mixing speed 350r/min, stirring
After the completion, it places it under the conditions of temperature is 80 DEG C, stands 3h, the mixture that will be obtained is negative in vacuum with vacuum filter
Pressure is filtered under the action of being 0.07MPa, and the filter cake that retention obtains is put into the deionized water of flowing and is washed, washing to PH
=7, the filter cake after washing is added in muffle furnace and is calcined, is added into pulverizer after calcining, pulverization process, mixture is obtained
A；
2) mixture A, active carbon, anhydrous calcium chloride, iron series deoxidizers, silicon powder are added in vacuum reaction kettle, in vacuum
Under the conditions of, it at the uniform velocity stirs, mixing time 1.5h, mixing speed 200r/min, after the completion of stirring, obtains deoxidation drying agent.
Comparative example 5
The present embodiment provides a kind of deoxidation drying agent preparation methods, compared with Example 1, the difference is that, the system of mixture A
Preparation Method: Concave-convex clay rod, red bentonite, bauxite are added in pulverizer, after pulverization process, mixture crosses 200 mesh
Molecular sieve directly obtains mixture A after acidification, remaining is same as Example 1.
Conventional performance index test is carried out to the deoxidation drying agent that embodiment 1-10 and comparative example 1-5 are prepared, as a result
As shown in table 3.
3 conventional performance index test result of table
| Embodiment | Temperature (DEG C) | Relative humidity RH20% hydroscopicity (%) | Relative humidity RH50% hydroscopicity (%) | Relative humidity RH90% hydroscopicity (%) | Deoxidation effectiveness (ml/g) | Water retention (%) |
| Embodiment 1 | 25 | 14.37 | 18.14 | 28.91 | 135 | 80.41 |
| Embodiment 2 | 25 | 15.11 | 19.27 | 29.89 | 131 | 89.72 |
| Embodiment 3 | 25 | 14.94 | 19.01 | 29.41 | 129 | 89.14 |
| Embodiment 4 | 25 | 17.32 | 24.33 | 35.26 | 144 | 89.81 |
| Embodiment 5 | 25 | 16.13 | 22.19 | 32.11 | 128 | 88.21 |
| Embodiment 6 | 25 | 15.89 | 22.1 | 31.19 | 131 | 85.11 |
| Embodiment 7 | 25 | 14.66 | 19.72 | 30.27 | 129 | 86.19 |
| Embodiment 8 | 25 | 15.55 | 20.12 | 30.87 | 137 | 85.42 |
| Embodiment 9 | 25 | 14.39 | 18.9 | 28.88 | 140 | 81.2 |
| Embodiment 10 | 25 | 15.54 | 21.17 | 31.02 | 131 | 83.56 |
| Comparative example 1 | 25 | 7.69 | 14.41 | 19.14 | 98 | 64.12 |
| Comparative example 2 | 25 | 8.15 | 14.89 | 21.11 | 102 | 58.17 |
| Comparative example 3 | 25 | 8.94 | 15.13 | 20.16 | 110 | 49.18 |
| Comparative example 4 | 25 | 10.41 | 14.59 | 17.64 | 108 | 55.22 |
| Comparative example 5 | 25 | 7.41 | 11.33 | 16.32 | 89 | 56.31 |
As shown in Table 3: the deoxidation drying agent that embodiment 1-10 is prepared carries out conventional performance index test, is 25 DEG C in temperature
Under the conditions of, when relative humidity RH is 20%, hydroscopicity minimum 14.37%;Under the conditions of temperature is 25 DEG C, relative humidity RH is
When 50%, hydroscopicity minimum 18.14%;Under the conditions of temperature is 25 DEG C, when relative humidity RH is 90%, hydroscopicity is minimum
28.88%;The deoxidation drying agent that comparative example 1-5 is prepared, under the conditions of same temperature, relative humidity RH is respectively 20%,
50%, 90% when, highest hydroscopicity is respectively 10.41%, 15.13%, 21.11%；The deoxidation drying agent that embodiment 1-10 is prepared
Minimum hydroscopicity be above deoxidation drying agent that comparative example 1-5 is prepared under the conditions of 25 DEG C, relative humidity RH is respectively
20%, 50%, 90% highest hydroscopicity, and embodiment 1-10 be prepared the minimum deoxidation effectiveness of deoxidation drying agent, minimum water conservation
Rate is respectively 128ml/g, 80.41% is above 110 ml/g of deoxidation drying agent highest deoxidation effectiveness that comparative example 1-5 is prepared
And highest water retention 64.12%.
In summary, the deoxidation drying agent that embodiment 1-10 is prepared is dry better than the deoxidation that comparative example 1-5 is prepared
Drying prescription, and embodiment 4 is under the conditions of 25 DEG C, when relative humidity RH is respectively 20%, 50%, 90%, hydroscopicity highest, and deoxidation is imitated
Rate, water retention are maximum value, therefore the deoxidation drying agent performance that embodiment 4 is prepared is best.
Comparative example 1 provides a kind of deoxidation drying agent (based on parts by weight), compared with Example 1, the difference is that, change
Become the parts by weight proportion of deoxidation drying agent, the deoxidation drying agent being prepared exists respectively in same temperature, relative humidity RH
20%, under the conditions of 50%, 90%, hydroscopicity decline, deoxidation effectiveness, water retention are also reduced, and show the weight of deoxidation drying agent of the present invention
Number proportion rationally, can effectively enhance the hydroscopicity, DNA vaccine and water retention of deoxidation drying agent.
Comparative example 2 provides a kind of deoxidation drying agent (based on parts by weight), compared with Example 1, the difference is that, it will
18 parts of Concave-convex clay rod, red 20 parts of bentonite, 25 parts of bauxite be substituted for 63 parts of single red bentonite, be prepared
Deoxidation drying agent same temperature, relative humidity RH respectively 20%, 50%, 90% under the conditions of, hydroscopicity decline, deoxidation effectiveness,
Water retention also reduces, and shows Concave-convex clay rod, red bentonite, bauxite three while being used as raw material swollen better than single red
Profit soil is used as raw material.
Comparative example 3 provides a kind of deoxidation drying agent (based on parts by weight), compared with Example 1, the difference is that, it takes off
It is not added with microcrystalline cellulose in oxygen desiccant, the deoxidation drying agent being prepared exists respectively in same temperature, relative humidity RH
20%, under the conditions of 50%, 90%, hydroscopicity decline, deoxidation effectiveness also decreases, but relatively other comparative examples, the present embodiment water conservation
Rate is minimum, therefore adds microcrystalline cellulose and help to improve water retention.
Comparative example 4 provides a kind of deoxidation drying agent preparation method, compared with Example 1, the difference is that, change deoxidation
Each step relevant parameter of desiccant, the deoxidation drying agent being prepared in same temperature, relative humidity RH respectively 20%, 50%,
Under the conditions of 90%, hydroscopicity decline, deoxidation effectiveness, water retention also reduce, show respectively to walk in deoxidation drying agent preparation process of the present invention
Rapid relevant parameter is reasonable, can effectively enhance the hydroscopicity, DNA vaccine and water retention of deoxidation drying agent.
Comparative example 5 provides a kind of deoxidation drying agent preparation method, compared with Example 1, the difference is that, mixture A
Preparation method: Concave-convex clay rod, red bentonite, bauxite are added in pulverizer, after pulverization process, mixture mistake
200 mesh molecular sieves directly obtain mixture A after acidification, the deoxidation drying agent being prepared same temperature,
Respectively under the conditions of 20%, 50%, 90%, hydroscopicity decline, deoxidation effectiveness, water retention also reduce relative humidity RH, and hydroscopicity,
Deoxidation effectiveness is minimum in comparative example 1-5, it is known that, acidification can play crucial work to moisture absorption, the deoxidation of deoxidation drying agent
With.
Deoxidation drying agent of the present invention has hydroscopicity high, and simple process is pollution-free, and deoxidation effect is significant, lasting moisture absorption
Ability, and after deoxidation moisture absorption, deoxidation drying agent water holding capacity is strong, and no sepage phenomenon occurs, the deoxidation drying agent and its preparation side
Method has applications well prospect.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of deoxidation drying agent, it is characterised in that: be made of the raw material of following portions by weight: 5-8 parts of active carbon, anhydrous chlorination
6-10 parts of calcium, 15-25 parts of Concave-convex clay rod, red 20-30 parts of bentonite, 20-25 parts of bauxite, iron series deoxidizers 35-45
Part, 6-10 parts of microcrystalline cellulose, 5-10 parts of silicon powder.
2. a kind of nano heat-insulating antibiotic paint according to claim 1, it is characterised in that: oxygen in the red bentonite
Change aluminium content >=12%, iron oxide content >=15%, bauxite internal oxidition aluminium content is >=60%, Concave-convex clay rod internal oxidition aluminium
Content >=8%, calcium oxide content >=25%, content of magnesia >=14%.
3. a kind of nano heat-insulating antibiotic paint according to claim 1, it is characterised in that: the silicon powder partial size is
0.02mm-0.04mm。
4. a kind of nano heat-insulating antibiotic paint according to claim 1, it is characterised in that: the iron series deoxidizers contains
92%-95% ferrous metal.
5. a kind of described in any item preparation methods of deoxidation drying agent of claim 1-4, it is characterised in that: including walking as follows
It is rapid:
1) Concave-convex clay rod, red bentonite, bauxite are added in pulverizer, after pulverization process, mixture crosses 200 mesh point
Smashed Concave-convex clay rod, red bentonite, bauxite powder are added sulfuric acid and carry out acidification by son sieve, after acidification,
It adds it in blender, starts to stir, after the completion of stirring, under the conditions of 80 DEG C of temperature, stand 3h, the mixing that will be obtained
Object is filtered under the action of negative pressure of vacuum is 0.07MPa with vacuum filter, and the filter cake that retention obtains is put into flowing
It is washed in deionized water, the filter cake after washing is added in muffle furnace and calcines, pulverizer is added into after calcining by washing to PH=7
Interior, pulverization process obtains mixture A；
2) mixture A, active carbon, anhydrous calcium chloride, iron series deoxidizers, silicon powder, microcrystalline cellulose are added to vacuum reaction
It in kettle, under vacuum conditions, at the uniform velocity stirs, to prevent iron series deoxidizers from aoxidizing under non-vacuum condition, while passing through stirring
It realizes the uniform purpose of each feed distribution, after the completion of stirring, obtains deoxidation drying agent.
6. a kind of preparation method of deoxidation drying agent according to claim 5, it is characterised in that: sour in the step 1)
Change treatment process, dilution heat of sulfuric acid used preparation is made of following component by weight percentage: the sulfuric acid 5%-15% of concentration 98% with
And water 85%-95%, ingredient used are made of following component by weight percentage: Concave-convex clay rod, red bentonite, bauxite
Powder 60%-70% and dilution heat of sulfuric acid 30%-40%.
7. a kind of preparation method of deoxidation drying agent according to claim 5, it is characterised in that: stirred in the step 1)
Mixing process mixing time is 1h-3h, mixing speed 200r/min-300r/min.
8. a kind of preparation method of deoxidation drying agent according to claim 5, it is characterised in that: even in the step 2)
Fast mixing time is 2h-3h, mixing speed 300r/min-500r/min.
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| CN113274974A (en) * | 2021-05-24 | 2021-08-20 | 珠海领航电气有限公司 | Polymer passive circulation moisture absorption and preservation composition and structure and preparation process thereof |
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