CN106492620A - A kind of deoxidation type drier - Google Patents
A kind of deoxidation type drier Download PDFInfo
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- CN106492620A CN106492620A CN201610915480.3A CN201610915480A CN106492620A CN 106492620 A CN106492620 A CN 106492620A CN 201610915480 A CN201610915480 A CN 201610915480A CN 106492620 A CN106492620 A CN 106492620A
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- 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
- B01D53/81—Solid phase processes
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- 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
- B01D53/26—Drying gases or vapours
- B01D53/28—Selection of materials for use as drying agents
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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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0225—Compounds of Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt
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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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
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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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/046—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium containing halogens, e.g. halides
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/14—Diatomaceous earth
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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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/10—Single element gases other than halogens
- B01D2257/104—Oxygen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
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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
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/42—Materials comprising a mixture of inorganic materials
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Abstract
The invention provides a kind of deoxidation type drier, including the component of following mass ratio：15～45% magnesia；30～45% magnesium chloride；9～24% diatomite；9～30% iron powder；0.1～10% carbon dust.Its advantage is：There is very strong deoxidation amount and wettability power, maximal oxygen uptake can reach 100ml, under conditions of 25 DEG C, humidity are 90%, hydroscopicity can reach more than the 200% of own wt, and there are no at present hydroscopicity under similarity condition state reach own wt more than 200% drier while having deoxidation effect.
Description
Technical field
The present invention relates to a kind of while deoxidation drying agent with high hydroscopicity, high deoxidation amount function, especially a kind of ore deposit
The deoxidation drying agent composition of species.
Background technology
Drier is the most frequently used material of industrial and civilian damp-prrof packing, and deoxidier is then that industrial and civilian antirust is anti-mildew
The most frequently used material, and moistureproof and mildewproof is become rustization function set deoxidation drying agent together and is not found in industry.
Typically existing drier commodity have physics moisture absorption type：Silica-gel desiccant, mineral agent, activated carbon drier,
Montmorillonite drier, fiber desiccant etc., its hydroscopicity typically up to can only achieve 30% or so, also chemical hygroscopic type：Chlorine
Change calcium drier, magnesium chloride drier etc. moisture-proof role is provided by the hygroscopy of salt, a gang of hydroscopicity of the drier of this type
More than 150% can be reached, with high hygroscopic property.But as the deliquescence of salt is so as to change the state of drier itself, from powder
Or lenticular changes into liquid or gelinite, the safety issue that reveals on shipping storage is caused.Wherein magnesium chloride drier is inhaled
Wet condition is more slightly higher than the security of general chemical hygroscopic drying agent, the magnesite material formed by magnesium chloride, magnesia etc., is inhaling
Solid state can be transitioned into from powder or crystal state directly in wet process, so as to avoid the product of the safety issues such as leakage
Raw.
In prior art, such as Chinese invention patent ZL 200710068572.3 discloses a kind of drier of high hydroscopicity
And its formula is selected, with magnesium chloride, magnesia and silica as raw material, its optimum proportioning is 30: 68 :2, obtain
Drier hydroscopicity up to more than 200%, into loose bulk after moisture absorption, with preferable security performance.
What existing deoxidier application was wider has iron series deoxidizers and enzyme system deoxidier.Enzyme system deoxidier is to pH, Aw, salt
The change of content, temperature and other factors is all very sensitive, also needs the participation of water in reaction, therefore, in the food of low moisture content
In product, application effect is bad.Due to its low cost, raw material are easy to get becomes most widely used in the market to iron series deoxidizers
Deoxidier.And temperature, humidity, the ratio of each composition of deoxidier, the size of iron particles, deoxidier and antioxidant or other are anti-
Answer mechanism deoxidier whether compound all be affect iron series deoxidizers deoxy performance key factor.Therefore with regard to food deoxidant root
According to different food products pack environment requirement made by formula just have many kinds.Main formula material is main with reduced iron powder
Raw material, auxiliary material then, based on the materials such as activated carbon, mineral, diatomite, salt, can provide corresponding moisture, reaction temperature for iron powder
The required environment of the reduction reactions such as degree.
But now widely used drier and deoxidier are functionally all relatively simple, it is impossible to protect one more comprehensively
Low humidity is required, is easily aoxidized, rustization, the product of qualitative change.
Content of the invention
For this purpose, the present invention is solution above-mentioned technical problem, there is provided a kind of deoxidation type drier.
The present invention realizes that the technical scheme that goal of the invention is adopted is：The present invention provides a kind of hydroscopicity height, and deoxidation amount is high, plus
Work, deoxidation type drier easy to use, including the component of following mass ratio：15～45% magnesia；30～45% chlorination
Magnesium；9～24% diatomite；9～30% iron powder；0.1～10% carbon dust.
Preferably, the deoxidation type drier also NaOH containing 0.1～10%.
Preferably, the deoxidation type drier is grouped into by the group of following mass ratio, 15～20% magnesia；30～40%
Magnesium chloride；0.1～1% carbon dust；19～24% diatomite；20～30% iron powder.
Preferably, the deoxidation type drier is grouped into by the group of following mass ratio, 15～20% magnesia；30～40%
Magnesium chloride；0.1～1% carbon dust；19～24% diatomite；20～30% iron powder；0.1～10% NaOH.
Preferably, the magnesium chloride is anhydrous magnesium chloride.
Preferably, the iron powder is also secondary originality iron powder.
Preferably, the magnesia is mixing for light calcined magnesia, activated magnesia or light calcined magnesia and activated magnesia
Compound.Described magnesia preferably uses the mixture of light calcined magnesia and activated magnesia, wherein light calcined magnesia and activity
The mass ratio of magnesia is 3:1-3, light calcined magnesia are preferably 3 with the mass ratio of activated magnesia:1.5 ~ 2.5, most
Preferred mass ratio is 3: 2.
The moisture absorption deoxidation principle of deoxidation drying agent of the present invention is that magnesia is anti-with anhydrous magnesium chloride and water effect generation aquation
Should, the compound that formula is aMgO bMgCl cH2O is formed, in addition MgO can also generate magnesium hydroxide, nothing with water independent role
Aqueous magnesium chloride can also generate the magnesium chloride for carrying the crystallization water with water independent role, and diatomite and activated carbon have certain moisture absorption
And adsorption capacity, diatomite and activated carbon are act as by magnesia and anhydrous magnesium chloride and water and provides changing for salt and water
Environment, promote iron powder occur with air in sample occur redox reaction, its react skeleton symbol be 4Fe+6O2+6H2O →
4Fe (OH) 3, and appropriate NaOH is to adjust the alkaline environment regulation deoxidation amount that deoxidation is dried according to oxygen demand demand.
In the present invention, magnesia and magnesium chloride belong to the composition of drier as a kind of salt, because generally deoxidier also can
Add trace salt, thus magnesia and magnesium chloride simultaneously can also as the auxiliary element of deoxidier, in the present invention magnesia and
Magnesium chloride is substantial amounts of as the content of salt, while acting on drier forms synergy with deoxidant ingredient, this
Plant synergy to cause in the case of phase homogenous quantities, drying effect and deoxidation effect can be more preferably.
Drier of the present invention has the advantage that：
There is very strong wettability power and deoxidation amount, under conditions of 25 DEG C, humidity are 90%, hydroscopicity can reach itself
More than the 200% of weight, at 30 DEG C, under conditions of humidity is 80%, maximal oxygen uptake can reach 100ml, and there are no at present
Under similarity condition state, hydroscopicity reaches the drier of more than the 200% of own wt while having deoxidation effect.
There is the good feature of environmental protection, the material environment friendly of selection is nontoxic, the product after moisture absorption is easy to decompose in nature.
There is very high cost performance, the raw material magnesia for using, anhydrous magnesium chloride, diatomite, iron powder, activated carbon are valency
The abundant raw material of the cheap resources of production of lattice, wettability power are 2 ~ 6 times of general physical dryness agent, and the proterties after moisture absorption is loose
Scatter mass structure, its security performance are better than general chemical drier, while there is deoxidation effect again, which is of many uses, are suitable for various
The use of occasion.
Specific embodiment
Below, describe the present invention in conjunction with specific embodiments.
Embodiment 1
Following components is uniformly mixed, as required with moisture permeable material quantitative package.The mass percent composition of raw material
For：
Magnesia 20%
Magnesium chloride 30%
Carbon dust 1%
Diatomite 24%
Iron powder 25%.
Embodiment 2
Following components is uniformly mixed, as required with moisture permeable material quantitative package.The mass percent composition of raw material
For：
Magnesia 20%
Magnesium chloride 35%
Carbon dust 1%
Diatomite 21%
Iron powder 23%.
Embodiment 3
Following components is uniformly mixed, as required with moisture permeable material quantitative package.The mass percent composition of raw material
For：
Magnesia 20%
Magnesium chloride 40%
Carbon dust 1%
Diatomite 19%
Iron powder 20%.
Embodiment 4
Following components is uniformly mixed, as required with moisture permeable material quantitative package.The mass percent composition of raw material
For：
Magnesia 15%
Magnesium chloride 35%
Carbon dust 1%
Diatomite 19%
Iron powder 30%.
Embodiment 5
Following components is uniformly mixed, as required with moisture permeable material quantitative package.The mass percent composition of raw material
For：
Magnesia 20%
Magnesium chloride 30%
Carbon dust 1%
Diatomite 19%
Iron powder 30%.
Embodiment 6
Following components is uniformly mixed, as required with moisture permeable material quantitative package.The mass percent composition of raw material
For：
Magnesia 20%
Magnesium chloride 30%
Carbon dust 1%
Diatomite 20%
Iron powder 22%
NaOH 7%.
Embodiment 7
Following components is uniformly mixed, as required with moisture permeable material quantitative package.The mass percent composition of raw material
For：
Magnesia 40%
Magnesium chloride 40%
Carbon dust 1%
Diatomite 9%
Iron powder 10%.
In above example, magnesia is from light calcined magnesia and the mixture of activated magnesia, light calcined magnesia particle diameter
Generally less than 8mm is a kind of by magnisite stone, shepardite and by the magnesium hydroxide Mg (OH) extracted in seawater or bittern2,
Through the light calcined magnesia obtained by 700 ~ 1000 DEG C of temperature lower calcinations.The light calcined magnesia particle diameter distribution adopted in above example
Between 0 ~ 8mm, existing little particle has thinner powder again.Commercially available light calcined magnesia can be used, manufacturer such as Dandong
Yongxing mining industry Co., Ltd, the grand magnesite product Manufacturing Co., Ltd of Haicheng City etc..
The activated magnesia particle diameter of above example preferably uses 40 ~ 80 mesh typically in 40 ~ 350 mesh, Particle pollution,
The large percentage of surface atom and body phase atomicity and there is high chemism and physical absorption ability, due to exhibiting high surface
Atom and the presence of surface defect, the diffusion velocity of surface atom are very high, and therefore there is good sintering character.Commercially available activity
Magnesia can be used, manufacturer such as Dandong Yongxing mining industry Co., Ltd, the grand magnesite product Manufacturing Co., Ltd of Haicheng City
Etc..
The present invention is as used merely activated magnesia, although can meet use on moisture sorption effect, but dry after moisture absorption
Agent is in sticky pulpous state, easily reveals, and appropriate interpolation light calcined magnesia can still keep comparing after drier moisture absorption
Loose state.If merely using light calcined magnesia, although in good condition after drier moisture absorption, but wettability power can under
Drop, and it is harder to lump after moisture absorption, and the interpolation of activated magnesia can improve drier activity, drier and water after moisture absorption
Carry out can accelerate and carry out more thorough.
In order to reach good wettability power, the magnesium chloride used by above example is anhydrous magnesium chloride（Do not tie
Brilliant water）, although with the crystallization water（Such as with the crystallizations water such as 2,4,6）Magnesium chloride can also use but the crystallization water is more few more sharp
In the wettability power for improving drier.The purity of anhydrous magnesium chloride is more high also beneficial to the wettability power for improving drier, preferably pure
Spend for more than 97%.Anhydrous magnesium chloride has very strong moisture absorption, forms the compound of many water crystallizations at different temperatures with water, with
The particle diameter of the anhydrous magnesium chloride that upper embodiment is selected is generally less than 8mm, is distributed between 0 ~ 8mm, and existing little particle has thinner again
Powder.General commercial anhydrous magnesium chloride can be used, manufacturer such as Qinghai source of iron Mei Ye Co., Ltd, Shouguang
Ding Hao Trade Co., Ltd.s etc..
In order to reach higher oxygen absorbed, reduced iron of the oxygen consumption Duration Ratio of secondary reduction iron powder in reduced iron powder
The time of powder will be grown, and the iron powder that therefore above example is used is preferably secondary reduction iron powder.Secondary reduction iron powder is using once
Reduced iron powder is formed through melting deep processing, and iron-holder reaches more than 99%, and particle diameter is generally 40 mesh ~ 100 mesh, above example
It is preferred that 80 ~ 100 mesh are used.Typically commercially available secondary reduction iron powder can be used, manufacturer's such as prosperous powder of Gongyi City's bridge ditch gold
Metallurgical Factory, the thunderous mineral products processing tea in Lingshou County etc..
, by adding appropriate diatomite, after can making drier moisture absorption, product quality is slightly loose, otherwise high for above example
Harder bulk can be formed after circumstances moisture absorption, the further dilution inside lump can be like this hindered, reduce overall suction
Wet ability.Simultaneously because the loose porous of its quality, can store moisture and there is good permeability, secondary going back may be preferably inspired
Former iron powder reaction, improves deoxidation duration and the deoxidation amount of deoxidation drying agent.Diatomaceous particle diameter typically in 1 ~ 4mm, with
Upper embodiment preferably 2 ~ 3mm, if particle diameter is carefully easy to very much produce airborne dust, is unfavorable for processing and uses, and particle diameter slightly affects very much to make
Use effect.Typically commercially available diatomite can be used, manufacturer's such as fine products factory of Shengzhou East Zhejiang province diatomite etc..
By adding appropriate carbon dust, the initiator as deoxidation drying agent deoxidation is added above example.Typically can be with
From commercially available activated carbon, wood chip activated carbon, mao bamboon activated carbon and cocoanut active charcoal is included.As mao bamboon activated carbon is compared with wood chip
Activated carbon, the reference area with 3 times of wood chip activated carbons, with higher adsorption capacity, therefore above example is preferably active
Bamboo charcoal.Although cocoanut active charcoal with high mechanical properties, pore structure is flourishing, and specific surface area is big, and adsorption rate is fast, and absorption is held
Amount is high, it is easy to regenerate, and the features such as durable in use, but to obtain scope less so that relatively costly, inventive formulation due to raw material
Product can be used according to the economic worth of corresponding use product.150 mesh ~ 300 mesh are generally from activated carbon particle size, preferably
300 mesh, such as Dongguan City station wood Feng Lin filtering materials business department etc. of manufacturer.
The NaOH of embodiment 7 can adjust deoxidation drying agent according to the oxygen demand using product using directly interpolation
Oxygen absorbed, typically commercially available NaOH can be used.
Wettability power and deoxidizing capacity contrast experiment
Deoxidation drying agent prepared by embodiment 1～7 and 3 kinds of commercially available drier and deoxidier carry out moisture absorption respectively and deoxidation is surveyed
Try, test condition is：1. deoxidation test（Ambient temperature and moisture）2. moisture absorption test（25 DEG C of temperature, humidity 90%）
Test result is as follows：
| Drier is originated | Hydroscopicity after 7 days | Deoxidation amount after 7 days | State after 7 days |
| Embodiment 1 | 150.8% | 100ml | Dry tack free, blocking loosening |
| Embodiment 2 | 166.3% | 77ml | Dry tack free, lumps slightly loose |
| Embodiment 3 | 174.4% | 74ml | Dry tack free, lumps slightly loose |
| Embodiment 4 | 155.6% | 94ml | Dry tack free, blocking loosening |
| Embodiment 5 | 146.0% | 86.5ml | Dry tack free, blocking loosening |
| Embodiment 6 | 126.0% | 80ml | Dry tack free, lumps slightly loose |
| Embodiment 7 | 220% | 8ml | Surface moisture, lumps harder |
| Deoxidier | 0.0% | 167ml | Dry tack free, does not loosely lump |
| Commercial silica gel drier | 34.8% | 0ml/g iron powders | Without significant change |
| Commercially available ore deposit drier living | 30.8% | 0ml/g iron powders | Surface wettability, blocking loosening |
| Commercially available fiber desiccant | 98.3% | 0ml/g iron powders | Surface is in shape is soaked, thick |
From test result it can be seen that the deoxidation drying agent of the present invention has very strong wettability power, wettability power is existing all kinds of
2～6 times of drier；There is very strong deoxidizing capacity also simultaneously, deoxidizing capacity is the 60% of existing pure deoxidier.
Presently preferred embodiments of the present invention is the foregoing is only, not in order to limit the present invention, all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements that is made etc. should be included within the scope of the present invention.
Claims (8)
1. a kind of deoxidation type drier, including the component of following mass ratio：15～45% magnesia；30～45% magnesium chloride；
9～24% diatomite；9～30% iron powder；0.1～10% carbon dust.
2. deoxidation type drier according to claim 1, it is characterised in that：The deoxidation type drier also containing 0.1～
10% NaOH.
3. deoxidation type drier according to claim 1, it is characterised in that：The deoxidation type drier is by following quality
The group of ratio is grouped into, 15～20% magnesia；30～40% magnesium chloride；0.1～1% carbon dust；19～24% diatomite；
20～30% iron powder.
4. deoxidation type drier according to claim 2, it is characterised in that：The deoxidation type drier is by following quality
The group of ratio is grouped into, 15～20% magnesia；30～40% magnesium chloride；0.1～1% carbon dust；19～24% diatomite；
20～30% iron powder；0.1～10% NaOH.
5. the deoxidation type drier according to any one of claim 1-4, it is characterised in that：The magnesium chloride is anhydrous chlorine
Change magnesium.
6. deoxidation type drier according to claim 5, it is characterised in that：The iron powder is secondary reduction iron powder.
7. deoxidation type drier according to claim 5, it is characterised in that：The magnesia is light calcined magnesia, activity
Magnesia or the mixture of light calcined magnesia and activated magnesia.
8. deoxidation type drier according to claim 7, it is characterised in that：The magnesia is light calcined magnesia and work
Property magnesia mixture, the mass ratio of light calcined magnesia and activated magnesia is 3: 1-3.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159357A (en) * | 2017-06-08 | 2017-09-15 | 全椒县崇明米业有限公司 | It is a kind of to reduce the big rice processing method of broken rice rate |
| CN112121606A (en) * | 2020-10-10 | 2020-12-25 | 杭州家爽包装材料有限公司 | Drying agent and preparation method thereof |
| CN112871130A (en) * | 2021-01-15 | 2021-06-01 | 杭州干将实业有限公司 | Preparation method and preparation device of deoxidizer for medicine |
| CN115303644A (en) * | 2022-09-01 | 2022-11-08 | 湖南九典制药股份有限公司 | Method for reducing impurity growth rate of levocetirizine capsule |
| EP4173691A4 (en) * | 2020-06-30 | 2024-01-31 | Mitsubishi Gas Chemical Co | Oxygen scavenger composition and method for producing same |
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| CN101249418A (en) * | 2007-05-17 | 2008-08-27 | 张红军 | High hydroscopicity drier |
| CN104107678A (en) * | 2014-07-18 | 2014-10-22 | 杭州干将实业有限公司 | Adsorbent with deoxygenation and humidity control functions and preparation method thereof |
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Application publication date: 20170315 |