CN108970345A - A kind of desiccant and preparation method thereof - Google Patents
A kind of desiccant and preparation method thereof Download PDFInfo
- Publication number
- CN108970345A CN108970345A CN201810805173.9A CN201810805173A CN108970345A CN 108970345 A CN108970345 A CN 108970345A CN 201810805173 A CN201810805173 A CN 201810805173A CN 108970345 A CN108970345 A CN 108970345A
- Authority
- CN
- China
- Prior art keywords
- desiccant
- stirred
- added
- takes
- mass ratio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- B01D53/26—Drying gases or vapours
- B01D53/28—Selection of materials for use as drying agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
Abstract
The invention discloses a kind of desiccant and preparation method thereof, belong to chemical material technical field.The present invention prepares activity of water absorption object, adds sepiolite to introduce on the basis of guar gum and acrylic graft copolymer using styrene as hydrophobic comonomer, Swelling Capacity is improved, increases lattice chain gap, is conducive to the entrance of hydrone, swelling ratio increases, so that dry hydroscopicity is improved；Using silica gel as raw material, it is activated through nitric acid and sodium hydroxide, remove the impurity in silica gel, magnesium chloride and lithium chloride compounding is added, obtain anti-deliquescent agent, hole using macro porous silica gel is mainly it from the characteristics of band structure formation, and the moisture of absorption can be locked in inside desiccant, and not will cause to get damp reduces water-taking efficiency；It is added polyvinyl alcohol as modifying agent in desiccant matrix object, itself has certain wettability power, and the decomposition so that desiccant will not liquefy after water absorption and swelling keeps original form.The present invention solves the problems, such as that current drying agent hydroscopicity is poor.
Description
Technical field
The present invention relates to chemical material fields, more particularly to a kind of desiccant and preparation method thereof.
Background technique
Desiccant is a kind of deicer that moisture is absorbed from atmosphere, is by Water Molecular Adsorption by physics mode at itself
Structure in or absorbed by chemical mode and hydrone and change its chemical structure, become another substance.It is suitable for anti-
Only instrument, instrument, electrical equipment, drug, food, textile and other various packing article dampness.Cargo is during transportation
It often becomes damp and rotten because of temperature height, electronic product also be easy to cause metal to aoxidize, and causes performance bad.The use of desiccant be for
The extra moisture is avoided to cause the undesirable generation of product quality.Currently, the desiccant kind sold on the market is more, but big
It mostly all adulterates, hydroscopicity is not high, and using effect is bad.
Summary of the invention
The technical problems to be solved by the invention: for the problem of current drying agent hydroscopicity difference, a kind of desiccant is provided
And preparation method thereof.
In order to solve the above technical problems, the present invention is using technical solution as described below:
A kind of desiccant, including activity of water absorption object, anti-deliquescent agent；
The preparation method of the anti-deliquescent agent, includes the following steps:
S1. silica gel activating is taken, is filtered, takes filter residue a to wash 5 ~ 7 times through deionized water, obtains washings, is kept the temperature, is cooled to room temperature, obtains
Cooled material；
S2. it takes cooled material 3 ~ 5:8 in mass ratio ~ 14:7 ~ 10 that magnesium chloride solution, mass fraction that mass fraction is 30% is added to be
40% lithium chloride solution is stirred in 25 ~ 30 DEG C, and filtering takes filtration cakes torrefaction, cooling then at 450 ~ 550 DEG C of 3 ~ 4h of roasting
It to room temperature, crushed 80 meshes, collect sieving particulate matter a to get anti-deliquescent agent.
The heat-retaining condition of washings in the step S1 are as follows: in 130 ~ 140 DEG C of 8 ~ 10h of heat preservation.
The preparation method of the activity of water absorption object, includes the following steps:
(1) it takes 1 ~ 3:10 of guar gum ~ 15 that the sodium hydroxide solution that concentration is 0.06mol/L is added, is stirred in 55 ~ 60 DEG C,
The ammonium persulfate of guar gum quality 3 ~ 6% is added, keeps the temperature, obtains stirring mixture；
(2) according to the mass fraction, 25 ~ 30 parts of stirring mixtures, 5 ~ 9 parts of acrylic acid, 6 ~ 8 parts of styrene, 15 ~ 20 parts of sepiolites are taken
Mixing, is passed through nitrogen protection, is stirred, obtain mixture, takes mixture 80 ~ 100:2 in mass ratio ~ 5 that N, N '-methylene is added
Bisacrylamide is stirred, and dry, pulverize 60 meshes, collects sieving particle to get activity of water absorption object.
Heat-retaining condition in the step (1) are as follows: in 55 ~ 60 DEG C of 10 ~ 15min of heat preservation.
Mixture is stirred condition in the step (2) are as follows:, 20 ~ 30min is stirred in 35 ~ 40 DEG C.
N is added in the step (2), N '-methylene-bisacrylamide is stirred condition are as follows: is warming up to 65 ~ 70 DEG C
It is stirred 2 ~ 3h.
The preparation method includes the following steps:
It takes polyvinyl alcohol 1 ~ 3:100 in mass ratio ~ 150 that deionized water is added, is stirred 20 ~ 30min, obtains soak, take suction
Anti- deliquescent agent mixing is added in water active matter 3 ~ 7:4 in mass ratio ~ 8, obtains dried object matrix object, takes dried object matrix object in mass ratio
The addition soak of 2 ~ 5:7 ~ 10, standing 18 ~ for 24 hours, filtering takes filter residue b dry to get desiccant.
The present invention is compared with other methods, and advantageous effects are:
(1) present invention is introduced on the basis of with guar gum and acrylic graft copolymer using styrene as hydrophobic comonomer,
Activity of water absorption object is prepared, sepiolite is added, is the silicate clay mineral with layer chain structure, contains Si-OH base
Group is added desiccant as filler, has reactive-OH on sepiolite surface, can be with acrylic acid and guar gum one
It rises and participates in polymerization reaction, play the role of crosslinking points, so as to improve the network structure of polymer, improve Swelling Capacity, draw
The phenyl for entering internal drainage can reduce the hydrogen bond action in network between hydrophilic radical in polymer network, make lattice chain gap
Increase, is conducive to the entrance of hydrone, thus swelling ratio increases, so that dry hydroscopicity is improved；
(2) present invention is activated using silica gel as raw material through nitric acid and sodium hydroxide, removes the impurity in silica gel, be added magnesium chloride and
Lithium chloride compounding obtains anti-deliquescent agent, and active magnesium chloride, lithium chloride have biggish specific surface area, higher intensity and alkalinity,
And the absorbent material in the desiccant such as lithium chloride, magnesium chloride easily deliquesces liquefaction, causing desiccant to occur, solution is excessive, and etch is dry
Object, the hole using macro porous silica gel is mainly it from the characteristics of band structure formation, therefore its water lock sound construction, the water of absorption
Dividing can be locked in inside desiccant, and not will cause to get damp reduces water-taking efficiency；
(3) for the present invention by being added polyvinyl alcohol as modifying agent in desiccant matrix object, itself has certain moisture absorption
Ability, cementitiousness have positive effect to the mechanical strength of desiccant, not only improve the adhesion stability of silica gel, and reduction is fallen
Powder phenomenon also improves the adhesion strength of dehumidifying active matter between layers, so that desiccant overall mechanical properties are improved, so that
Desiccant will not liquefy decomposition after water absorption and swelling, keep original form.
Specific embodiment
Activity of water absorption object:
(1) it takes 1 ~ 3:10 of guar gum ~ 15 that the sodium hydroxide solution that concentration is 0.06mol/L is added, is stirred 40 in 55 ~ 60 DEG C
~ 60min adds the ammonium persulfate of guar gum quality 3 ~ 6%, in 55 ~ 60 DEG C of 10 ~ 15min of heat preservation, obtains stirring mixture；
(2) according to the mass fraction, 25 ~ 30 parts of stirring mixtures, 5 ~ 9 parts of acrylic acid, 6 ~ 8 parts of styrene, 15 ~ 20 parts of sepiolites are taken
Mixing, is passed through nitrogen protection, is stirred 20 ~ 30min in 35 ~ 40 DEG C, obtains mixture, take mixture 80 ~ 100:2 in mass ratio
~ 5 are added N, and N '-methylene-bisacrylamide is warming up to 65 ~ 70 DEG C and is stirred 2 ~ 3h, dry, pulverize 60 meshes, collect
Particle be sieved to get activity of water absorption object.
Anti- deliquescent agent: S1. takes silica gel to wash through deionized water, and silica gel 1 ~ 3:9 in mass ratio ~ 13 addition is dense after taking out washing
The nitric acid dousing 18 that degree is 1mol/L ~ for 24 hours, filtering takes filter residue 2 ~ 4:10 in mass ratio ~ 15 that the hydrogen-oxygen that concentration is 1mol/L is added
Change sodium solution mixing, activation stands 10 ~ 18h, and filtering takes filter residue a to wash 5 ~ 7 times through deionized water, obtains washings in 130 ~ 140
DEG C heat preservation 8 ~ 10h, be cooled to room temperature, obtain cooled material；
S2. it takes cooled material 3 ~ 5:8 in mass ratio ~ 14:7 ~ 10 that magnesium chloride solution, mass fraction that mass fraction is 30% is added to be
40% lithium chloride solution, is stirred 18 in 25 ~ 30 DEG C ~ for 24 hours, and filtering takes filtration cakes torrefaction, then at 450 ~ 550 DEG C of roastings 3 ~
4h is cooled to room temperature, and crushed 80 meshes, collects sieving particulate matter a to get anti-deliquescent agent.
A kind of preparation method of desiccant, includes the following steps:
It takes polyvinyl alcohol 1 ~ 3:100 in mass ratio ~ 150 that deionized water is added, is stirred 20 ~ 30min, obtains soak, take suction
Anti- deliquescent agent mixing is added in water active matter 3 ~ 7:4 in mass ratio ~ 8, obtains dried object matrix object, takes dried object matrix object in mass ratio
The addition soak of 2 ~ 5:7 ~ 10, standing 18 ~ for 24 hours, filtering takes filter residue b dry to get desiccant.
Activity of water absorption object:
(1) it takes guar gum 1:10 that the sodium hydroxide solution that concentration is 0.06mol/L is added, is stirred 40min in 55 DEG C, then plus
The ammonium persulfate for entering guar gum quality 3% obtains stirring mixture in 55 DEG C of heat preservation 10min；
(2) according to the mass fraction, 25 parts of stirring mixtures, 5 parts of acrylic acid, 6 parts of styrene, 15 parts of sepiolite mixing are taken, are passed through
Nitrogen protection is stirred 20min in 35 DEG C, obtains mixture, takes mixture 80:2 in mass ratio that N, N '-di-2-ethylhexylphosphine oxide third is added
Acrylamide is warming up to 65 DEG C and is stirred 2h, dry, pulverize 60 meshes, collects sieving particle to get activity of water absorption object.
Anti- deliquescent agent: S1. takes silica gel to wash through deionized water, and silica gel 1:9 in mass ratio addition concentration is after taking out washing
The nitric acid dousing 18h of 1mol/L, filtering take filter residue 2:10 in mass ratio that the sodium hydroxide solution that concentration is 1mol/L is added mixed
It closes, activation stands 10h, and filtering takes filter residue a to wash 5 times through deionized water, obtains washings in 130 DEG C of heat preservation 8h, be cooled to room
Temperature obtains cooled material；
S2. the chlorination that magnesium chloride solution, mass fraction that cooled material 3:8:7 in mass ratio addition mass fraction is 30% are 40% is taken
Lithium solution is stirred 18h in 25 DEG C, and filtering takes filtration cakes torrefaction, then at 450 DEG C of roasting 3h, is cooled to room temperature, crushed 80
Mesh collects sieving particulate matter a to get anti-deliquescent agent.
A kind of preparation method of desiccant, includes the following steps:
Take polyvinyl alcohol 1:100 in mass ratio be added deionized water, be stirred 20min, obtain soak, take activity of water absorption object by
Anti- deliquescent agent mixing is added in mass ratio 3:4, obtains dried object matrix object, takes dried object matrix object 2:7 in mass ratio that soak is added,
18h is stood, filtering takes filter residue b dry to get desiccant.
Activity of water absorption object:
(1) it takes guar gum 3:15 that the sodium hydroxide solution that concentration is 0.06mol/L is added, is stirred 60min in 60 DEG C, then plus
The ammonium persulfate for entering guar gum quality 6% obtains stirring mixture in 60 DEG C of heat preservation 15min；
(2) according to the mass fraction, 30 parts of stirring mixtures, 9 parts of acrylic acid, 8 parts of styrene, 20 parts of sepiolite mixing are taken, are passed through
Nitrogen protection is stirred 30min in 40 DEG C, obtains mixture, takes mixture 100:5 in mass ratio that N, N '-di-2-ethylhexylphosphine oxide is added
Acrylamide is warming up to 70 DEG C and is stirred 3h, dry, pulverize 60 meshes, collects sieving particle to get activity of water absorption object.
Anti- deliquescent agent: S1. takes silica gel to wash through deionized water, and silica gel 3:13 in mass ratio addition concentration is after taking out washing
For 24 hours, filtering takes filter residue 4:15 in mass ratio that the sodium hydroxide solution that concentration is 1mol/L is added mixed to the nitric acid dousing of 1mol/L
It closes, activation stands 18h, and filtering takes filter residue a to wash 7 times through deionized water, obtains washings in 140 DEG C of heat preservation 10h, be cooled to room
Temperature obtains cooled material；
S2. the chlorine that magnesium chloride solution, mass fraction that cooled material 5:14:10 in mass ratio addition mass fraction is 30% are 40% is taken
Change lithium solution, be stirred in 30 DEG C for 24 hours, filtering takes filtration cakes torrefaction, then at 550 DEG C of roasting 4h, is cooled to room temperature, crushed
80 meshes collect sieving particulate matter a to get anti-deliquescent agent.
A kind of preparation method of desiccant, includes the following steps:
Take polyvinyl alcohol 3:150 in mass ratio be added deionized water, be stirred 30min, obtain soak, take activity of water absorption object by
Anti- deliquescent agent mixing is added in mass ratio 7:8, obtains dried object matrix object, takes dried object matrix object 5:10 to be in mass ratio added and impregnates
Liquid stands filtering for 24 hours, takes filter residue b dry to get desiccant.
Activity of water absorption object:
(1) it takes guar gum 2:13 that the sodium hydroxide solution that concentration is 0.06mol/L is added, is stirred 40 ~ 60min in 57 DEG C,
The ammonium persulfate for adding guar gum quality 5% obtains stirring mixture in 57 DEG C of heat preservation 13min；
(2) according to the mass fraction, 270 parts of stirring mixtures, 6 parts of acrylic acid, 7 parts of styrene, 18 parts of sepiolite mixing are taken, are passed through
Nitrogen protection is stirred 25min in 37 DEG C, obtains mixture, takes mixture 90:4 in mass ratio that N, N '-di-2-ethylhexylphosphine oxide third is added
Acrylamide is warming up to 67 DEG C and is stirred 2.5h, dry, pulverize 60 meshes, collects sieving particle to get activity of water absorption object.
Anti- deliquescent agent: S1. takes silica gel to wash through deionized water, and silica gel 2:11 in mass ratio addition concentration is after taking out washing
The nitric acid dousing 22h of 1mol/L, filtering take filter residue 3:11 in mass ratio that the sodium hydroxide solution that concentration is 1mol/L is added mixed
It closes, activation stands 13h, and filtering takes filter residue a to wash 6 times through deionized water, obtains washings in 135 DEG C of heat preservation 9h, be cooled to room
Temperature obtains cooled material；
S2. the chlorine that magnesium chloride solution, mass fraction that cooled material 4:11:9 in mass ratio addition mass fraction is 30% are 40% is taken
Change lithium solution, be stirred 20h in 27 DEG C, filter, take filtration cakes torrefaction, then at 500 DEG C of roasting 3.5h, be cooled to room temperature, crushes
80 meshes are crossed, collect sieving particulate matter a to get anti-deliquescent agent.
A kind of preparation method of desiccant, includes the following steps:
Take polyvinyl alcohol 2:111 in mass ratio be added deionized water, be stirred 25min, obtain soak, take activity of water absorption object by
Anti- deliquescent agent mixing is added in mass ratio 5:6, obtains dried object matrix object, takes dried object matrix object 3:8 in mass ratio that soak is added,
20h is stood, filtering takes filter residue b dry to get desiccant.
Comparative example 1: it is essentially identical with the preparation method of embodiment 2, it has only the difference is that lacking activity of water absorption object.
Comparative example 2: it is essentially identical with the preparation method of embodiment 2, it has only the difference is that lacking anti-deliquescent agent.
Comparative example 3: the desiccant of Hangzhou company production.
To desiccant (desiccant powder made from embodiment 1 ~ 3) of the invention and existing similar desiccant (comparative example 1 ~ 4
Desiccant), it is tested for the property using the conventional method of this field, obtains that the results are shown in Table 1.
Table 1:
In summary, desiccant moisture absorption of the invention is more preferable, is worth of widely use.
Claims (7)
1. a kind of desiccant, which is characterized in that including activity of water absorption object, anti-deliquescent agent；
The preparation method of the anti-deliquescent agent, includes the following steps:
S1. silica gel activating is taken, is filtered, takes filter residue a to wash 5 ~ 7 times through deionized water, obtains washings, is kept the temperature, is cooled to room temperature, obtains
Cooled material；
S2. it takes cooled material 3 ~ 5:8 in mass ratio ~ 14:7 ~ 10 that magnesium chloride solution, mass fraction that mass fraction is 30% is added to be
40% lithium chloride solution is stirred in 25 ~ 30 DEG C, and filtering takes filtration cakes torrefaction, cooling then at 450 ~ 550 DEG C of 3 ~ 4h of roasting
It to room temperature, crushed 80 meshes, collect sieving particulate matter a to get anti-deliquescent agent.
2. desiccant according to claim 1, which is characterized in that the heat-retaining condition of washings in the step S1 are as follows: in
130 ~ 140 DEG C of 8 ~ 10h of heat preservation.
3. desiccant according to claim 1, which is characterized in that the preparation method of the activity of water absorption object, including it is as follows
Step:
(1) it takes 1 ~ 3:10 of guar gum ~ 15 that the sodium hydroxide solution that concentration is 0.06mol/L is added, is stirred in 55 ~ 60 DEG C,
The ammonium persulfate of guar gum quality 3 ~ 6% is added, keeps the temperature, obtains stirring mixture；
(2) according to the mass fraction, 25 ~ 30 parts of stirring mixtures, 5 ~ 9 parts of acrylic acid, 6 ~ 8 parts of styrene, 15 ~ 20 parts of sepiolites are taken
Mixing, is passed through nitrogen protection, is stirred, obtain mixture, takes mixture 80 ~ 100:2 in mass ratio ~ 5 that N, N '-methylene is added
Bisacrylamide is stirred, and dry, pulverize 60 meshes, collects sieving particle to get activity of water absorption object.
4. desiccant according to claim 3, which is characterized in that heat-retaining condition in the step (1) are as follows: in 55 ~ 60 DEG C
Keep the temperature 10 ~ 15min.
5. desiccant according to claim 3, which is characterized in that mixture is stirred condition in the step (2)
Are as follows:, 20 ~ 30min is stirred in 35 ~ 40 DEG C.
6. desiccant according to claim 3, which is characterized in that N, N '-methylene bisacrylamide are added in the step (2)
Amide is stirred condition are as follows: is warming up to 65 ~ 70 DEG C and is stirred 2 ~ 3h.
7. a kind of preparation method of the desiccant as described in claim 1 ~ 6 any one, which is characterized in that the preparation method packet
Include following steps:
It takes polyvinyl alcohol 1 ~ 3:100 in mass ratio ~ 150 that deionized water is added, is stirred 20 ~ 30min, obtains soak, take suction
Anti- deliquescent agent mixing is added in water active matter 3 ~ 7:4 in mass ratio ~ 8, obtains dried object matrix object, takes dried object matrix object in mass ratio
The addition soak of 2 ~ 5:7 ~ 10, standing 18 ~ for 24 hours, filtering takes filter residue b dry to get desiccant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810805173.9A CN108970345A (en) | 2018-07-20 | 2018-07-20 | A kind of desiccant and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810805173.9A CN108970345A (en) | 2018-07-20 | 2018-07-20 | A kind of desiccant and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108970345A true CN108970345A (en) | 2018-12-11 |
Family
ID=64549174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810805173.9A Withdrawn CN108970345A (en) | 2018-07-20 | 2018-07-20 | A kind of desiccant and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108970345A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280110A (en) * | 2019-07-02 | 2019-09-27 | 陕西中医药大学 | A kind of chemical drier and preparation method thereof |
| CN114632500A (en) * | 2022-03-31 | 2022-06-17 | 杭州干将实业有限公司 | Drying agent for precise optical instrument and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55121951A (en) * | 1979-03-13 | 1980-09-19 | Takara Kenzai Seisakusho Goush | Manufacture of clayey mineral swelling burnt mass |
| JPH0523584A (en) * | 1991-07-25 | 1993-02-02 | Kawata Mfg Co Ltd | Adsorptive ceramic porous element and its manufacture |
| CN101631999A (en) * | 2006-06-05 | 2010-01-20 | 联合株式会社 | Sheets for total heat exchangers |
| CN102407093A (en) * | 2011-07-26 | 2012-04-11 | 华东理工大学 | Composite silica gel humidity adjusting agent |
| CN102908978A (en) * | 2012-11-12 | 2013-02-06 | 江西理工大学 | Method for preparing efficient adsorbent through in-situ reaction |
-
2018
- 2018-07-20 CN CN201810805173.9A patent/CN108970345A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55121951A (en) * | 1979-03-13 | 1980-09-19 | Takara Kenzai Seisakusho Goush | Manufacture of clayey mineral swelling burnt mass |
| JPH0523584A (en) * | 1991-07-25 | 1993-02-02 | Kawata Mfg Co Ltd | Adsorptive ceramic porous element and its manufacture |
| CN101631999A (en) * | 2006-06-05 | 2010-01-20 | 联合株式会社 | Sheets for total heat exchangers |
| CN102407093A (en) * | 2011-07-26 | 2012-04-11 | 华东理工大学 | Composite silica gel humidity adjusting agent |
| CN102908978A (en) * | 2012-11-12 | 2013-02-06 | 江西理工大学 | Method for preparing efficient adsorbent through in-situ reaction |
Non-Patent Citations (3)
| Title |
|---|
| 施小宁等: "苯乙烯/黏土协同作用对瓜尔胶复合高吸水凝胶性能影响", 《高分子材料科学与工程》 * |
| 李鑫等: "除湿材料研究进展", 《化工进展》 * |
| 赖育挺等: "MgCl2/硅胶氨复合吸附剂的制备研究", 《四川化工》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280110A (en) * | 2019-07-02 | 2019-09-27 | 陕西中医药大学 | A kind of chemical drier and preparation method thereof |
| CN114632500A (en) * | 2022-03-31 | 2022-06-17 | 杭州干将实业有限公司 | Drying agent for precise optical instrument and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107029668B (en) | A kind of honeycomb type molecular sieve-active carbon compound adsorbent, preparation method and applications | |
| CN104549370B (en) | Photocatalysis cellular activated carbon net | |
| CN105214615B (en) | A kind of moulding process of composite absorbent material | |
| CN108970345A (en) | A kind of desiccant and preparation method thereof | |
| CN106268652B (en) | A kind of preparation method of the heavy metal chelating agent based on MOFs | |
| CN112456491B (en) | Production process of environment-friendly regenerated activated carbon | |
| CN106315552B (en) | A kind of classifying porous carbon material and its preparation method and application | |
| US4058483A (en) | Adsorbent material | |
| CN101362072A (en) | Absorbent for removing trace benzene in carbon dioxide and preparation method thereof | |
| CN104741074A (en) | Method for preparing expanded vermiculite adsorbent | |
| CN107413295A (en) | The preparation method of the nano-fibre supported hydroxyapatite defluorination material of porous activated carbon | |
| CN110652961A (en) | Preparation method of magnesium oxide porous nano material loaded activated carbon fiber felt | |
| CN113231020A (en) | Activated carbon with improved adsorption efficiency and preparation method thereof | |
| CN109289917A (en) | Alkali modification removes the preparation method of formaldehyde composite catalyst | |
| CN103272562A (en) | Preparation method of filter material base activated carbon fiber | |
| CN110327905A (en) | A kind of nitrogenous porous carbon nano-composite material preparation method of polyaniline carbon nanotube base | |
| CN113244894A (en) | Preparation method and application of composite water treatment agent | |
| CN115041134B (en) | Carbonized gel material with lithium adsorption performance and preparation method and application thereof | |
| US11931722B2 (en) | Preparation method for carbon dioxide capture agent, and application thereof | |
| CN114917887B (en) | Wood-based/MOF composite aerogel film and preparation method thereof | |
| CN107662919A (en) | The method of dry process biomass moulding activated carbon | |
| CN108905539A (en) | A kind of preparation method of composite bentonite desiccant | |
| CN114797748A (en) | Air purification adsorption material and preparation method and application thereof | |
| KR101305454B1 (en) | Carbon adsorbent codoped nitrogen, oxygen, fluorine for carbon dioxide adsorption and manufacturing method thereof | |
| JP7360580B2 (en) | Ammonia adsorption material and float for covering the liquid surface to reduce the amount of ammonia volatilization |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181211 |