CN113385152A - Gel desiccant particles and preparation method thereof - Google Patents
Gel desiccant particles and preparation method thereof Download PDFInfo
- Publication number
- CN113385152A CN113385152A CN202110662364.6A CN202110662364A CN113385152A CN 113385152 A CN113385152 A CN 113385152A CN 202110662364 A CN202110662364 A CN 202110662364A CN 113385152 A CN113385152 A CN 113385152A
- Authority
- CN
- China
- Prior art keywords
- desiccant
- calcium chloride
- cellulose
- parts
- water
- 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.)
- Pending
Links
Classifications
-
- 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
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/261—Synthetic macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds
-
- 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
- B01D53/261—Drying gases or vapours by adsorption
-
- 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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28011—Other properties, e.g. density, crush strength
-
- 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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28047—Gels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/20—Organic adsorbents
- B01D2253/202—Polymeric adsorbents
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention provides a gel desiccant granule, comprising 60-80 parts by weight of water-absorbing resin, 1-10 parts by weight of cellulose and the balance of desiccant by 100 parts by weight; the water-absorbing resin is hydroxyethyl cellulose sodium, hydroxypropyl cellulose sodium or polyacrylamide; the drying agent is calcium chloride and magnesium chloride, and the mass ratio of the calcium chloride to the magnesium chloride is 1: 1. The gel desiccant provided by the invention keeps the characteristics of low price, high reproducibility and good hygroscopicity of calcium chloride, and the moisture absorbed by the calcium chloride can be absorbed by the polyacrylamide polymer water absorption and retention agent, so that the calcium chloride is effectively prevented from being liquefied, and meanwhile, the moisture absorption rate of the gel desiccant is increased due to the synergistic effect of the calcium chloride and the polyacrylamide.
Description
Technical Field
The invention relates to a gel desiccant granule and a preparation method thereof, belonging to the technical field of desiccants.
Background
The desiccant can adsorb moisture in the medium by utilizing the good dehumidification capacity of the desiccant, and keep the indoor or the object package dry for a long time, thereby achieving the aims of moisture prevention and mildew prevention. The drying agents are classified into physical adsorption type and chemical adsorption type according to adsorption manner.
The drying agent is prepared by two modes of wet granulation and dry granulation, wherein the wet granulation is a method of wetting the surfaces of medicinal powder particles by a liquid adhesive, then making the powder into particles with certain shapes and sizes under the action of adhesion and external mechanical force, and the drying step is needed for final shaping after the preparation. Although wet granulation has the advantage of good formation, it is then deliquescent during granulation, damaging the desiccant content, and requires drying after granulation, which is energy intensive and therefore unsuitable for granulation with gel desiccants.
Dry granulation is primarily directed to granulated products that may be sensitive to moisture and heat or not compress well, and therefore the process is used to form granules without the use of liquid solutions. The granules were formed in the absence of moisture. Dry granulation can be carried out in two ways: producing large tablets (slugs) in a heavy-duty tablet press, or pressing the powder between two rollers to produce a sheet; when dry granulation is performed using a tablet press, the powder may not have sufficient natural flow to feed the product uniformly into the die cavity, resulting in varying degrees of densification. The roller compactor (granulator) uses a screw feed system to deliver the powder evenly between two pressure rollers. The powder is compacted into ribbons or small particles between these rollers and milled by a low shear mill. When the product is properly compacted, it can be passed through a mill prior to tableting and ultimately formed into a homogeneous mixture.
At present, in the dry granulation process, the following conditions often occur:
(1) the material is not compacted or fine powder leaks;
(2) the compressibility of the material is lost.
The present application is proposed to solve the above-mentioned technical problems.
Disclosure of Invention
In view of the deficiencies of the prior art, it is a first object of the present invention to provide a gel desiccant granule.
A second object of the present invention is to provide a method for preparing the above-mentioned gel desiccant particles.
In order to achieve the first object, the invention is realized by the following technical scheme: the gel desiccant granule comprises, by weight, 100 parts of water-absorbing resin 60-80 parts, cellulose 1-10 parts, and the balance of a desiccant.
Preferably, the water absorbent resin comprises 75-80 parts by weight of water absorbent resin, 5-10 parts by weight of cellulose and the balance of drying agent based on 100 parts by weight.
By adopting the technical scheme, the cellulose is added in the dry granulation process, any intermediate and additive are not needed, the granulated product has uniform granularity, the bulk density is obviously increased, the pollution is controlled, the powder waste is reduced, the appearance and the fluidity of the material are improved, and the storage and the transportation are convenient.
Preferably, the water-absorbent resin is hydroxyethyl cellulose sodium, hydroxypropyl cellulose sodium or polyacrylamide.
By adopting the technical scheme, the hydroxyethyl cellulose sodium, the hydroxypropyl cellulose sodium or the polyacrylamide are used as key components for forming the gel, and the materials can form the gel after absorbing water and have the function of salt resistance.
The polyacrylamide has a three-dimensional network structure, contains amide groups with strong hydrophilicity on a high molecular chain, can absorb and lock a large amount of water, and shows strong water absorption and retention capacity. The water molecules are chemically adsorbed by calcium chloride, the calcium chloride absorbs water to become solution, the water exists in the form of free water, a better water absorption environment is provided for polyacrylamide, then the free water diffuses into a polymer network to be combined with amide groups on a macromolecular chain to form hydrogen bonds, the water molecules are locked, the phenomenon of liquid leakage after the calcium chloride absorbs water is prevented, and meanwhile, the polymer is highly swelled due to water absorption to form gel.
Preferably, the drying agent is calcium chloride and magnesium chloride, and the mass ratio of the calcium chloride to the magnesium chloride is 1: 1.
The gel can firmly absorb water molecules in a gel network, so that the seepage of the water molecules can be avoided, the salt spray condition caused by independently using calcium chloride or magnesium chloride is further avoided, and the pollution to the articles to be dried is avoided.
The gel desiccant provided by the invention keeps the characteristics of low price, high reproducibility and good hygroscopicity of calcium chloride, and the moisture absorbed by the calcium chloride can be absorbed by the polyacrylamide polymer water absorption and retention agent, so that the calcium chloride is effectively prevented from being liquefied, and meanwhile, the moisture absorption rate of the gel desiccant is increased due to the synergistic effect of the calcium chloride and the polyacrylamide.
In order to achieve the second object, the invention is realized by the following technical scheme: the preparation method of the gel desiccant particles comprises the steps of proportioning, rolling, granulating, screening and dust recovery, and is characterized in that the rolling parameters are as follows: the roller rotation speed is 100-.
Preferably, the particle size of the cellulose is 100-150 meshes.
Preferably, the particle size of the water-absorbent resin is 80-120 meshes.
Preferably, the particle size of the drying agent is 120-150 meshes.
By adopting the technical scheme, the particle sizes of the water-absorbent resin and the drying agent are controlled, so that the rolling forming is facilitated, the larger the particle size of the material is, the more adverse effect is on the rolling forming, the smaller the particle size of the material is, the flowability of the material can be influenced, and the adverse effect can be caused on the later rolling.
The invention has the beneficial effects that:
(1) the invention directly prepares the powder raw material into a granular product meeting the requirements of users without any intermediate or additive, the granularity of the granulated product is uniform, the bulk density is obviously increased, the pollution is controlled, the waste of powder is reduced, the appearance and the fluidity of the material are improved, and the storage and the transportation are convenient.
(2) The invention does not need to dry the product in the production process, simplifies the production process and reduces the investment and the energy consumption. Extrusion granulation is more suitable for materials which are not suitable for granulation by a granulation method or materials with heat sensitivity.
(3) The invention adds cellulose, and improves the success rate of roll forming by combining the cellulose, the water-absorbing resin and the drying agent.
(4) The rolling granulator is produced by a dry method, so the moisture of the material is low, and the dust is large. Therefore, all places where the dust can be raised need to be designed into a closed effect, so that the direct contact between the materials and the air is prevented, and the problem of dust leakage is solved.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example 1
A gel desiccant granule comprises 60g of hydroxyethyl cellulose sodium, 10g of cellulose, 15g of calcium chloride and 15g of magnesium chloride.
In this example, the particle size of the hydroxyethyl cellulose is 100 mesh, the particle size of the calcium chloride is 120 mesh, and the particle size of the magnesium chloride is 120 mesh.
A method of making a gel desiccant granule comprising the steps of:
(1) ingredients
The materials are prepared according to the proportion, the vacuum feeding machine is used for feeding materials, and the whole vacuum feeding machine is closed, so that dust flying is avoided.
(2) Roll pressing
The materials are put into a storage hopper, are pre-extruded and exhausted through a variable-frequency forced screw, and then enter a roller press for compaction, wherein the rotating speed of a roller is 100r/min, the pressure of the roller is 1.5BAR, and the feeding speed is 1 kg/min.
(3) Granulating
The lumpy materials extruded by the roller press enter a cabin of a granulating machine, and the materials are extruded out of a screen mesh at one time.
(4) Sieving
The materials produced by the granulator are screened on a screening machine through a buffer hopper at the lower part. The appearance is relatively regular, and full granules meeting the requirements can be directly packaged.
(5) Dust recovery
The powder screened by the screening machine automatically slides to the return hopper for reuse through the chute, so that the material is recycled.
Example 2
A gel desiccant granule comprises sodium hydroxypropyl cellulose 80g, cellulose 5g, calcium chloride 7.5g and magnesium chloride 7.5 g.
In this example, the particle size of the hydroxyethyl cellulose is 80 mesh, the particle size of the cellulose is 120 mesh, the particle size of the calcium chloride is 150 mesh, and the particle size of the magnesium chloride is 150 mesh.
A method of making a gel desiccant granule comprising the steps of:
(1) ingredients
The same as in example 1.
(2) Roll pressing
The materials are put into a storage hopper, are pre-extruded and exhausted through a variable-frequency forced screw, and then enter a roller press for compaction, wherein the rotating speed of a roller is 125r/min, the pressure of the roller is 1.5BAR, and the feeding speed is 2 kg/min.
(3) - (5) same as in example 1.
Example 3
A gel desiccant granule comprises 80g of hydroxypropyl cellulose sodium, 1g of cellulose and 19g of calcium chloride.
In this example, the particle size of the hydroxyethyl cellulose is 120 mesh, the particle size of the cellulose is 150 mesh, the particle size of the calcium chloride is 150 mesh, and the particle size of the magnesium chloride is 150 mesh.
A method of making a gel desiccant granule comprising the steps of:
(1) ingredients
The same as in example 1.
(2) Roll pressing
The materials are put into a storage hopper, are pre-extruded and exhausted through a variable-frequency forced screw, and then enter a roller press for compaction, wherein the rotating speed of a roller is 100r/min, the pressure of the roller is 2BAR, and the feeding speed is 3 kg/min.
(3) - (5) same as in example 1.
Example 4
A gel desiccant granule comprises 80g of polyacrylamide, 10g of cellulose, 5g of calcium chloride and 5g of magnesium chloride.
In this example, the particle size of the hydroxyethyl cellulose is 100 mesh, the particle size of the cellulose is 120 mesh, the particle size of the calcium chloride is 130 mesh, and the particle size of the magnesium chloride is 130 mesh.
A method of making a gel desiccant granule comprising the steps of:
(1) ingredients
The same as in example 1.
(2) Roll pressing
The materials are put into a storage hopper, are pre-extruded and exhausted through a variable-frequency forced screw, and then enter a roller press for compaction, wherein the rotating speed of a roller is 100r/min, the pressure of the roller is 1.5BAR, and the feeding speed is 3 kg/min.
(3) - (5) same as in example 1.
Test example 1
And (3) test groups: example 1 and comparative example 1; the desiccant currently on the market is designated as comparative example 1.
The test method comprises the following steps: the desiccants of example 1 and comparative example 1 were tested for performance using methods conventional in the art, and the results are detailed in table 1.
Table 1 comparison of performance data for the desiccants of example 1 and comparative example 1
Referring to table 1, the gel desiccant prepared by the present application has better moisture absorption effect than the commercially available desiccant under the same conditions.
Test example 2
(1) Effect of cellulose particle size on sheeting Effect
And (3) test groups: example 2 and comparative examples 2-5; the cellulose particle diameters used in comparative examples 2 to 5 were 80 mesh, 100 mesh, 150 mesh and 180 mesh in this order, and the other examples were the same as example 2.
The test method comprises the following steps: the effect of each group of rollers in rolling was observed separately and is detailed in table 2.
TABLE 2 comparison table of the rolling sheet effect in the rolling process
(2) Influence of particle size of water-absorbent resin on sheet-forming effect by roll pressing
And (3) test groups: example 2 and comparative examples 6-9; the particle sizes of the hydroxyethyl cellulose used in comparative examples 6 to 9 were 60 mesh, 100 mesh, 120 mesh and 150 mesh in this order, and the other examples were the same as example 2.
The test method comprises the following steps: the effect of each group of rollers in rolling was observed separately and is detailed in table 3.
TABLE 3 comparison table of rolling sheet effect in rolling process
(3) Effect of desiccant particle size on tableting Effect
And (3) test groups: example 2 and comparative examples 10-13; the particle sizes of the desiccants used in comparative examples 10 to 13 were 80 mesh, 100 mesh, 120 mesh and 180 mesh in this order, and the other examples were the same as example 2.
The test method comprises the following steps: the effect of each group of rollers in rolling was observed separately and is detailed in table 4.
TABLE 4 comparison table of rolling sheet effect in rolling process
Referring to tables 2-4, the particle sizes of different raw materials have an effect on roll-pressing and sheet-forming, the larger the particle size of the raw material is, the more unfavorable the roll-pressing and sheet-forming is, but the smaller the particle size of the material is, although the material can form a sheet in the roll-pressing and sheet-forming process, the material is easy to be crushed in the granulation process and can not be granulated, in conclusion, the cellulose particle size adopted in the application is 150 meshes in 100-120 meshes, the water-absorbing resin particle size is 80-120 meshes, and the drying agent particle size is 150 meshes in 120-150 meshes.
Test example 3
And (3) test groups: example 3 and comparative example 14; comparative example 14 the same procedure as in example 3 was repeated except that no cellulose was added.
The test method comprises the following steps: the effect of each group of rollers in rolling was observed separately and is detailed in table 5.
TABLE 5 comparison table of rolling sheet effect in rolling process
| Fluidity of the material | Rolling and sheeting effect | Granulation effect | |
| Example 3 | Good taste | Can be formed into sheet | Can be granulated |
| Comparative example 14 | Difference (D) | Can not be rolled into sheets | Can not be granulated |
Referring to table 5, example 3 compares with comparative example 14, and comparative example 14 without added cellulose has poor material fluidity during the preparation process, can not flow normally before rolling, and can not roll into sheet shape during the rolling process, which shows that the added cellulose has significant effect during the dry granulation process of the drying agent, and the granulated product of example 3 has uniform particle size and significantly increased bulk density.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The gel desiccant granule is characterized by comprising, by weight, 60-80 parts of water-absorbing resin, 1-10 parts of cellulose and the balance of a desiccant in 100 parts.
2. The gel desiccant beads of claim 1, comprising 75 to 80 parts by weight of the water absorbent resin, 5 to 10 parts by weight of the cellulose, and the balance desiccant, based on 100 parts by weight.
3. The desiccant beads of claim 2, wherein said cellulose has a particle size of 100-150 mesh.
4. A gelled desiccant device as claimed in claim 3 wherein said water-absorbing resin is sodium hydroxyethyl cellulose, sodium hydroxypropyl cellulose or polyacrylamide.
5. The gel-desiccant granule as claimed in claim 4, wherein said desiccant is calcium chloride and magnesium chloride, said calcium chloride and magnesium chloride being present in a mass ratio of 1 (0-1).
6. The desiccant gel-beads of claim 5, wherein said water-absorbent resin has a particle size of 80-120 mesh.
7. The gelled desiccant particles of claim 5, wherein the desiccant has a particle size of 120-150 mesh.
8. A method of preparing a gelled desiccant pellet as claimed in any one of claims 1 to 7 comprising compounding, rolling, granulating, sieving and dust recovery, wherein the rolling parameters are: the roller rotation speed is 100-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110662364.6A CN113385152A (en) | 2021-06-15 | 2021-06-15 | Gel desiccant particles and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110662364.6A CN113385152A (en) | 2021-06-15 | 2021-06-15 | Gel desiccant particles and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113385152A true CN113385152A (en) | 2021-09-14 |
Family
ID=77621099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110662364.6A Pending CN113385152A (en) | 2021-06-15 | 2021-06-15 | Gel desiccant particles and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113385152A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1827206A (en) * | 2004-08-10 | 2006-09-06 | 超级干燥印尼有限公司 | Hygroscopic mixture |
| CN103566910A (en) * | 2013-10-15 | 2014-02-12 | 昆山威胜干燥剂研发中心有限公司 | Drying agent |
| CN105727880A (en) * | 2016-02-19 | 2016-07-06 | 甘肃工业技术研究院 | Preparing technology for environment-friendly attapulgite adsorbing/drying agent |
| CN106552485A (en) * | 2015-09-30 | 2017-04-05 | 明光市龙腾矿物有限公司 | A kind of efficient removal moisture drying agent |
| CN107224848A (en) * | 2016-07-04 | 2017-10-03 | 如皋长江科技产业有限公司 | A kind of drier |
| US20180043329A1 (en) * | 2015-07-07 | 2018-02-15 | Carbonxt, Inc. | High mechanical strength sorbent product, system, and method for controlling multiple pollutants from process gas |
| CN112870926A (en) * | 2021-01-26 | 2021-06-01 | 深圳市宏电技术股份有限公司 | Drying agent and preparation method and application thereof |
-
2021
- 2021-06-15 CN CN202110662364.6A patent/CN113385152A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1827206A (en) * | 2004-08-10 | 2006-09-06 | 超级干燥印尼有限公司 | Hygroscopic mixture |
| CN103566910A (en) * | 2013-10-15 | 2014-02-12 | 昆山威胜干燥剂研发中心有限公司 | Drying agent |
| US20180043329A1 (en) * | 2015-07-07 | 2018-02-15 | Carbonxt, Inc. | High mechanical strength sorbent product, system, and method for controlling multiple pollutants from process gas |
| CN106552485A (en) * | 2015-09-30 | 2017-04-05 | 明光市龙腾矿物有限公司 | A kind of efficient removal moisture drying agent |
| CN105727880A (en) * | 2016-02-19 | 2016-07-06 | 甘肃工业技术研究院 | Preparing technology for environment-friendly attapulgite adsorbing/drying agent |
| CN107224848A (en) * | 2016-07-04 | 2017-10-03 | 如皋长江科技产业有限公司 | A kind of drier |
| CN112870926A (en) * | 2021-01-26 | 2021-06-01 | 深圳市宏电技术股份有限公司 | Drying agent and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 卫功庆等: "《铁合金工程技术》", vol. 1, 中国农业大学出版社, pages: 190 - 192 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20090205757A1 (en) | Manufacture of Pyrotechnic Objects By a Dry Process; Pyrotechnic Objects | |
| Lerk | Consolidation and compaction of lactose | |
| US4675188A (en) | Granular anhydrous dicalcium phosphate compositions suitable for direct compression tableting | |
| CA2266956C (en) | Process for the manufacture of chemical absorbents, and chemical absorbent formulations | |
| US3975549A (en) | Agglomerated dehydrated potato product and method for forming a reconstituted dough-like product therefrom | |
| CN110292566A (en) | A method of reducing effervescent tablet sticking amount in actual production | |
| CN113385152A (en) | Gel desiccant particles and preparation method thereof | |
| CN110372419A (en) | Blend ammonium magnesium phosphate particle and preparation method thereof that is not stratified and meeting water disintegratable | |
| CN208406912U (en) | A kind of magnesium sulfate fertilizer dry method rolling pelletizer | |
| CN104529597A (en) | Method for producing compound fertilizer by extrusion-kneading process | |
| DE102006034621B4 (en) | Process for the granulation of kieserite and kieserite containing mineral fertilizers | |
| JPS5931040B2 (en) | Radioactive waste granulation equipment | |
| DE102011113034B4 (en) | Gas absorption granules and process for its preparation | |
| CN101390840A (en) | Production method of high-assay calcium ascorbate granules capable of directly being compressed | |
| US2951791A (en) | Use of calcium silicate in tablet compressing | |
| CN102188420B (en) | Levetiracetam medicinal composition and preparation method thereof | |
| CN107468655B (en) | Lentinan particles and preparation method thereof | |
| CN114478128B (en) | Wrapped type anti-powdering additive, anti-powdering fertilizer and preparation method of anti-powdering fertilizer | |
| US5858406A (en) | Conversion of powdered polymers | |
| CN101811009A (en) | Novel high-efficient energy-saving salt granulating process | |
| CN101289201A (en) | Method for preparing high-concentration round grainy potassium muriate | |
| CN104095184B (en) | A kind of granular compound sugar alcohol and preparation method thereof | |
| YAMAOKA et al. | Studies on the characteristics of carbochromen hydrochloride crystals. II. Polymorphism and cracking in the tablets | |
| CN104045078A (en) | Graphene particle, preparation method and application thereof | |
| CN117339581A (en) | Granular drying agent and preparation method thereof |
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 |