CN105085723A - Method for preparing powder material by polymer solvent removal - Google Patents
Method for preparing powder material by polymer solvent removal Download PDFInfo
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- CN105085723A CN105085723A CN201510581290.8A CN201510581290A CN105085723A CN 105085723 A CN105085723 A CN 105085723A CN 201510581290 A CN201510581290 A CN 201510581290A CN 105085723 A CN105085723 A CN 105085723A
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Abstract
The invention discloses a method for preparing a powder material by polymer solvent removal. The method comprises the following steps: carrying out spray drying on a polymer colloidal liquid by superheated steam, sending the polymer powder on the bottom of a drying tower into a cyclone separator to remove the solvent and steam, sending the powder into a fluidized-bed dryer to perform drying until the water content of the polymer powder material is 0.5 wt% or below, finally, sending the powder into a product storage bin, packaging in the packaging machine position, and warehousing. The method is simple in technique, and implements the solvent removal and the powder material drying and preparation. The water content of the finally obtained polymer powder is 0.5 wt% or below, the solvent content is less than 0.5 wt%, and the particle size range is 5-100 mu m. The method is suitable for producing multiple products, has the advantages of wide applicability and low energy consumption, further enhances the quality of the product, and has better comprehensive economic effects.
Description
Technical field
The present invention relates to chemical production technical field, more particularly, particularly relate to and a kind ofly remove the method preparing powder materials for polymer solvent.
Technical background
As everyone knows, most of existing SEBS and the SEPS product commercially sold exists with the form of powder, and the polymkeric substance sold with mash form meets the custom that final user carries out processing.Therefore, in the last handling process of SEBS and SEPS product, the form being prepared into powder is needed.
In existing polymer powders technology of preparing, in the mode of solvent removal process many employings steam stripped of SEBS and SEPS, the method energy consumption is high.For the postprocessing working procedures preparing powder product, the equipment such as many employing extrusion expansion machines, Fourdrinier type drying machine, fluid bed dryer, runner milling, these equipment all come from external producer, and cost is high, not easy-maintaining.In use, equipment, as broken down, can cause the stopping production of device, and causes serious financial loss to enterprise.
Summary of the invention
The object of the present invention is to provide and a kind ofly remove the method preparing powder materials for polymer solvent, it can overcome the defect that prior art energy consumption is high, facility investment is large and production cost is high.
Technical scheme of the present invention comprises the following steps:
(1), first polymkeric substance glue and superheated vapour are obtained polymer powders by carrying out spraying dry in injector feeding drying tower; Described polymkeric substance glue is the mixed solution of polymkeric substance and organic solvent composition; Described polymkeric substance is the hydrogenation products containing olefines unsaturated link(age) polymkeric substance; Described organic solvent is inert hydrocarbon solvent; The concentration of described polymkeric substance glue is 5-40wt%;
(2), then polymer powders is sent in cyclonic separator and carries out removing organic solvent and water vapor;
(3), then polymer powders is sent in fluid bed dryer and carries out drying;
(4), finally polymer powders is carried out packaging warehouse-in.
Technique scheme can be done preferably following further:
Preferably, the described hydrogenation products containing olefines unsaturated link(age) polymkeric substance comprises the hydrogenation products of the multipolymer of the hydrogenation products of conjugated diene homopolymers, conjugated diolefine and vinyl-arene; A step is preferred again, and the described hydrogenation products containing olefines unsaturated link(age) polymkeric substance is hydrogenated styrene-butadiene-styrene block copolymers (SEBS) or hydrogenated styrene isoprene-styrene block copolymer (SEPS).
Preferably, described inert hydrocarbon solvent is selected from one or more the mixture in alkane, naphthenic hydrocarbon and aromatic hydrocarbons; A step is preferred again, and described inert hydrocarbon solvent is normal hexane or hexanaphthene.
Preferably, superheated vapour selective pressure is 1.0-2.5MPa in described step (1), temperature is the superheated vapour of 180-230 DEG C, and more preferably pressure 1.3MPa, temperature are the superheated vapour of 200 DEG C; Temperature in drying tower is at 140-190 DEG C; Temperature in described step (2) in cyclonic separator is 135-185 DEG C; In described step (3), fluidized-bed temperature is at 80-150 DEG C, and the residence time of material in fluidized-bed can adjust according to the physicals of different material, and the fluidisation time is typically chosen in 15-30 minute.
Preferably, the input speed of described cyclonic separator is 5-8m/s, and this speed can ensure that the powder obtained is all from the outlet at bottom discharging of cyclonic separator, and loss amount is few, described Cyclone outlet place material water ratio controls as 3%-8%, and solvent controls at 0.5%-1%.
Preferably, the water content (weight) of described fluidized-bed exit polymer powders is below 0.5%, and solvent (weight) is less than 0.5%, and powder diameter size is 5 μm-100 μm.
The present invention adopts spray-drying process directly to carry out spraying dry to polymkeric substance glue (glue of such as SEBS and SEPS), not only reduce superheated vapour consumption but also can directly make dried product exist with the form of powder, thus decrease equipment investment, the equipment simultaneously adopted just can be used at home to, reduce costs, can ensure that the long-time normal of postprocessing working procedures runs, compared with prior art, there is following technique effect:
1, the scope of method of the present invention application is wide, equipment adaptable, and same set of device can be applicable to the production of multiple polymers solvent removal and powder materials, is also applicable to the product of the different trade mark of same kind.
2, method of the present invention is more thorough to removing of polymer solvent compared with additive method, and solvent can be controlled in less than 0.5%, and the quality of product further improves.
3, the polymkeric substance in method of the present invention, does not obviously limit its preparation method, anionoid polymerization, cationoid polymerisation, polycoordination and the polymkeric substance prepared by other polymerization process can, use range is wide.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Embodiment
Below in conjunction with specific embodiment and Figure of description, the present invention is described further, and SEBS(Hydrogenated SBS selected by the polymkeric substance glue wherein in embodiment) polymkeric substance glue or SEPS(hydrogenation SIS) polymkeric substance glue.
Embodiment 1
Remove the method preparing powder materials for polymer solvent, the steps include:
(1), to be first 180 DEG C of superheated vapours by 5wt%SEBS polymkeric substance glue and pressure 1.0MPa, temperature by injector send into carries out spraying dry in drying tower and obtains polymer powders, control temperature 140-190 DEG C in drying tower; Polymkeric substance glue is the mixed solution of SEBS and normal hexane solvent composition;
(2), then by polymer powders be sent in cyclonic separator and carry out removing organic solvent and water vapor, in cyclonic separator, control temperature is at 135-185 DEG C, and cyclonic separator input speed controls as 5-8m/s;
(3), then polymer powders is sent in fluid bed dryer and carries out drying; Fluidized-bed temperature controls at 80 DEG C, and the fluidisation time is 30 minutes.
(4) after, finally polymer powders being sent into product feed bin, unlap seat in the plane carries out packing rear warehouse-in.
Embodiment 2
Remove the method preparing powder materials for polymer solvent, the steps include:
(1), to be first 230 DEG C of superheated vapours by 40wt%SEBS polymkeric substance glue and pressure 2.5MPa, temperature by injector send into carries out spraying dry in drying tower and obtains polymer powders, control temperature 140-190 DEG C in drying tower; Polymkeric substance glue is the mixed solution of SEBS and normal hexane solvent composition;
(2), then by polymer powders be sent in cyclonic separator and carry out removing organic solvent and water vapor, in cyclonic separator, control temperature is at 135-185 DEG C, and the input speed of cyclonic separator controls as 5-8m/s;
(3), then polymer powders is sent in fluid bed dryer and carries out drying; Fluidized-bed temperature controls at 150 DEG C, and the fluidisation time is 15 minutes.
(4) after, finally polymer powders being sent into product feed bin, unlap seat in the plane carries out packing rear warehouse-in.
Embodiment 3
Remove the method preparing powder materials for polymer solvent, the steps include:
(1), to be first 200 DEG C of superheated vapours by 25wt%SEBS polymkeric substance glue and pressure 1.3MPa, temperature by injector send into carries out spraying dry in drying tower and obtains polymer powders, control temperature 140-190 DEG C in drying tower; Polymkeric substance glue is the mixed solution of SEBS and normal hexane solvent composition;
(2), then by polymer powders be sent in cyclonic separator and carry out removing organic solvent and water vapor, in cyclonic separator, control temperature is at 135-185 DEG C, and the input speed of cyclonic separator controls as 5-8m/s;
(3), then polymer powders is sent in fluid bed dryer and carries out drying; Fluidized-bed temperature controls at 120 DEG C, and the fluidisation time is 25 minutes.
(4) after, finally polymer powders being sent into product feed bin, unlap seat in the plane carries out packing rear warehouse-in.
Embodiment 4
Remove the method preparing powder materials for polymer solvent, the steps include:
(1), to be first 180 DEG C of superheated vapours by 5wt%SEPS polymkeric substance glue and pressure 1.0MPa, temperature by injector send into carries out spraying dry in drying tower and obtains polymer powders, control temperature 140-190 DEG C in drying tower; Polymkeric substance glue is the mixed solution of SEPS and normal hexane solvent composition;
(2), then by polymer powders be sent in cyclonic separator and carry out removing organic solvent and water vapor, in cyclonic separator, control temperature is at 135-185 DEG C, and the input speed of cyclonic separator controls as 5-8m/s;
(3), then polymer powders is sent in fluid bed dryer and carries out drying; Fluidized-bed temperature controls at 80 DEG C, and the fluidisation time is 30 minutes.
(4) after, finally polymer powders being sent into product feed bin, unlap seat in the plane carries out packing rear warehouse-in.
Embodiment 5
Remove the method preparing powder materials for polymer solvent, the steps include:
(1), to be first 230 DEG C of superheated vapours by 40wt%SEPS polymkeric substance glue and pressure 2.5MPa, temperature by injector send into carries out spraying dry in drying tower and obtains polymer powders, control temperature 140-190 DEG C in drying tower; Polymkeric substance glue is the mixed solution of SEPS and cyclohexane solvent composition;
(2), then by polymer powders enter into cyclonic separator to carry out removing organic solvent and water vapor, in cyclonic separator, control temperature is at 135-185 DEG C, and the input speed of cyclonic separator controls as 5-8m/s;
(3), then polymer powders is sent in fluid bed dryer and carries out drying; Fluidized-bed temperature controls at 150 DEG C, and the fluidisation time is 15 minutes.
(4) after, finally polymer powders being sent into product feed bin, unlap seat in the plane carries out packing rear warehouse-in.
Embodiment 6
Remove the method preparing powder materials for polymer solvent, the steps include:
(1), to be first 200 DEG C of superheated vapours by 25wt%SEPS polymkeric substance glue and pressure 1.3MPa, temperature by injector send into carries out spraying dry in drying tower and obtains polymer powders, control temperature 140-190 DEG C in drying tower; Polymkeric substance glue is the mixed solution of SEPS and normal hexane solvent composition;
(2), then by polymer powders enter into cyclonic separator to carry out removing organic solvent and water vapor, in cyclonic separator, control temperature is at 135-185 DEG C, and the input speed of cyclonic separator controls as 5-8m/s;
(3), then polymer powders is sent in fluid bed dryer and carries out drying; Fluidized-bed temperature controls at 120 DEG C, and the fluidisation time is 25 minutes.
(4) after, finally polymer powders being sent into product feed bin, unlap seat in the plane carries out packing rear warehouse-in.
Table 1 powder water ratio and solvent
As can be seen from the result of the solvent removal of above each embodiment, the technical indicator of embodiment 3 and 6 is best, and water content and solvent all reach Schwellenwert, and the energy utilization rate of unit product is the highest.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (8)
1. remove the method preparing powder materials for polymer solvent, it is characterized in that, comprise the following steps:
(1), first polymkeric substance glue and superheated vapour are obtained polymer powders by carrying out spraying dry in injector feeding drying tower; Described polymkeric substance glue is the mixed solution of polymkeric substance and organic solvent composition; Described polymkeric substance is the hydrogenation products containing olefines unsaturated link(age) polymkeric substance; Described organic solvent is inert hydrocarbon solvent; The concentration of described polymkeric substance glue is 5-40wt%;
(2), then polymer powders is sent in cyclonic separator and carries out removing organic solvent and water vapor;
(3), then polymer powders is sent in fluid bed dryer and carries out drying;
(4), finally polymer powders is carried out packaging warehouse-in.
2. according to claim 1ly remove the method preparing powder materials for polymer solvent, it is characterized in that, the described hydrogenation products containing olefines unsaturated link(age) polymkeric substance comprises the hydrogenation products of the multipolymer of the hydrogenation products of conjugated diene homopolymers, conjugated diolefine and vinyl-arene; Described inert hydrocarbon solvent is selected from one or more the mixture in alkane, naphthenic hydrocarbon and aromatic hydrocarbons.
3. according to claim 2ly remove the method preparing powder materials for polymer solvent, it is characterized in that, the described hydrogenation products containing olefines unsaturated link(age) polymkeric substance is hydrogenated styrene-butadiene-styrene block copolymers or hydrogenated styrene isoprene-styrene block copolymer; Described inert hydrocarbon solvent is normal hexane or hexanaphthene.
4. according to claim 3ly remove the method preparing powder materials for polymer solvent, it is characterized in that, in described step (1), the pressure of superheated vapour is 1.0-2.5MPa, and temperature is 180-230 DEG C, and the temperature in drying tower controls at 140-190 DEG C; Temperature in described step (2) in cyclonic separator controls as 135-185 DEG C; In described step (3), fluidized-bed temperature controls at 80-150 DEG C.
5. according to claim 4ly remove the method preparing powder materials for polymer solvent, it is characterized in that, in described step (1), superheated vapour is chosen as pressure 1.3MPa, temperature is the superheated vapour of 200 DEG C.
6. according to claim 4ly remove the method preparing powder materials for polymer solvent, it is characterized in that, in described step (3), the fluidisation bed temperature fluidisation time is 15-30 minute.
7. according to claim 4ly remove the method preparing powder materials for polymer solvent, it is characterized in that, in described step (2), the input speed of cyclonic separator is 5-8m/s, and described Cyclone outlet place material water ratio controls as 3%-8%, and solvent controls at 0.5%-1%.
8. described remove for polymer solvent the method preparing powder materials according to claim 1-7 is arbitrary, it is characterized in that, the water content (weight) of described fluidized-bed exit polymer powders is below 0.5%, and solvent (weight) is less than 0.5%, and powder diameter size is 5 μm-100 μm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114316090A (en) * | 2020-09-29 | 2022-04-12 | 北京诺维新材科技有限公司 | Low-solvent-residue polymer and preparation method thereof |
| CN114644776A (en) * | 2022-04-29 | 2022-06-21 | 聊城鲁西聚碳酸酯有限公司 | System and method for recycling polycarbonate powder |
| WO2024025742A1 (en) | 2022-07-25 | 2024-02-01 | Exxonmobil Chemical Patents Inc. | Purged polymer, process and apparatus for production thereof |
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| JP2003147006A (en) * | 2001-11-16 | 2003-05-21 | Mitsubishi Rayon Co Ltd | Method for producing powdery graft copolymer |
| CN101768229A (en) * | 2008-12-30 | 2010-07-07 | 台橡股份有限公司 | Method for preparing highly hydrogenated segmented copolymer |
| CN102200379A (en) * | 2011-07-12 | 2011-09-28 | 湖南恒光科技股份有限公司 | Energy-saving spray-drying process |
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2015
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|---|---|---|---|---|
| JP2003147006A (en) * | 2001-11-16 | 2003-05-21 | Mitsubishi Rayon Co Ltd | Method for producing powdery graft copolymer |
| CN101768229A (en) * | 2008-12-30 | 2010-07-07 | 台橡股份有限公司 | Method for preparing highly hydrogenated segmented copolymer |
| CN102200379A (en) * | 2011-07-12 | 2011-09-28 | 湖南恒光科技股份有限公司 | Energy-saving spray-drying process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114316090A (en) * | 2020-09-29 | 2022-04-12 | 北京诺维新材科技有限公司 | Low-solvent-residue polymer and preparation method thereof |
| CN114316090B (en) * | 2020-09-29 | 2023-06-30 | 北京诺维新材科技有限公司 | Polymer with low solvent residue and preparation method thereof |
| CN114644776A (en) * | 2022-04-29 | 2022-06-21 | 聊城鲁西聚碳酸酯有限公司 | System and method for recycling polycarbonate powder |
| CN114644776B (en) * | 2022-04-29 | 2023-09-01 | 聊城鲁西聚碳酸酯有限公司 | System and method for recycling polycarbonate powder |
| WO2024025742A1 (en) | 2022-07-25 | 2024-02-01 | Exxonmobil Chemical Patents Inc. | Purged polymer, process and apparatus for production thereof |
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Application publication date: 20151125 |