KR20160108820A - Polyketon drying system of mesh screen - Google Patents

Abstract

The present invention relates to a polyketone drying system comprising a mesh screen. The present invention provides a polyketone drying system which is provided with a mesh screen generating vibration between a dryer for drying a polyketone polymer and a powder hopper for storing polyketone polymer powder to remove lumps and big particles contained in the polyketone polymer powder produced through a polyketone polymerization process and to improve the polymer properties, is capable of removing lumps and big particles from the polyketone polymer powder to reduce a deviation in tensile and physical properties of polyketone, allows effective continuous removal of lumps and big particles, and is capable of reducing a deviation in elongation at failure and samples. Particularly, the drying system for polyketone polymer powder produced through a polyketone polymerization reaction comprises: a drying device for drying the polyketone polymer powder; a powder hopper for storing and discharging the polyketone polymer powder after being dried completely through the drying device; and a mesh screen interposed between the drying device and the powder hopper for removing lumps and big particles contained in the polyketone polymer powder.

Description

Technical Field [0001] The present invention relates to a polyketone drying system including a mesh screen,

The present invention relates to a polyketone drying system, and more particularly, to a polyketone drying system capable of removing a lump and a large particle (Big Particle) contained in a polyketone polymer powder produced through a polyketone polymerization process To a polyketone drying system comprising a mesh screen.

In general, polymerization is a process of producing a molecule having a large molecular weight by continuously bonding molecules having a small molecular weight.

The polyketone produced by the polymerization reaction is a product applied by Shell, and as shown in FIG. 1, in a conventional commercialization facility, a polyketone is produced by a polymerization reaction, The ketone is centrifuged, the powder prepared by centrifugation is dried, and the dried powder is transferred to a powder hopper and extruded to produce a polyketone polymer.

However, when a polyketone polymerization reaction is carried out, a white powder is formed in a solution injected into a polymerization reactor, and during the polymerization reaction, a fouling phenomenon occurs in which the polymer is entangled or adhered and adhered around the inner wall surface of the polymerization reactor and the stirrer. ), And the fouling formed on the inner wall surface of the polymerization reactor and the stirrer grows again into the polyketone polymeric material to form a lump and a large particle (Big Particle) in the normal polyketone polymer.

As described above, when a resin product is produced from a polyketone polymer by incorporating a lump and a large diameter particle (Big Particle) generated by fouling in the polymerization reactor into the polyketone polymer, There has been a problem that a cosmetic fusion occurs.

That is, when the lump contained in the polyketone polymer and the particles having a large diameter are incorporated into the normal polyketone polymerized powder, there is a problem in that the physical properties of the polymer are lowered by causing non-melting in the resin during extrusion.

As a result, there has been a problem that the tensile property and physical property deviation, which are advantages of polyketone, can not be reduced.

Disclosure of the Invention The present invention has been conceived to solve the problems described above, and it is an object of the present invention to provide a mesh screen (mesh screen) in which vibration is generated between a dryer for drying a polyketone polymer and a powder hopper for storing a polyketone polymer powder. ) Can be used to remove the lump and the large particles (Big Particles) contained in the polyketone polymerized powder produced through the polyketone polymerization process, thereby improving the polymer properties. In the polyketone polymer powder It is possible to remove lumps and particles having a large diameter, thereby reducing the tensile properties and physical property deviations of the polyketone, enabling effective continuous removal of lumps and particles having a large diameter, and reducing the elongation at break and the variation with respect to the sample And a mesh screen which can be applied to the polyketone.

To achieve the above object, the present invention provides a drying system for a polyketone polymer powder produced by a polyketone polymerization reaction, comprising: a drying apparatus for drying a polyketone polymer powder; A powder hopper for storing and discharging the dried polyketone polymer powder through a drying device; And a mesh screen interposed between the drying device and the powder hopper to remove a lump and particles having a large diameter contained in the polyketone polymer composite powder; The present invention is characterized in that it comprises:

Here, the grid of the mesh screen has a size of less than 2.0 mm.

On the other hand, vibration motors for generating vibrations are connected to the mesh screen, and vibration motors are provided on both sides of the drying system, respectively.

As described above, the present invention having the above-described structure can remove a lump contained in the polyketone polymer powder and particles having a large diameter of 2 mm or more (Big Particle), thereby improving the polymer properties And it is possible to effectively reduce the variation in tensile properties and physical properties and to effectively and continuously remove lumps and large diameter particles contained in the dry powder made of the polyketone polymer, It is possible to improve the elongation at break, and the lump and the particles having a large diameter are removed and the polyketone polymer without the unhardened resin is extruded, the physical properties are remarkably increased as compared with the conventional polyketone polymer, It is possible to reduce the variation with respect to the sample.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic view showing a process for producing a polyketone polymer according to the prior art,
2 is a schematic view showing a process for producing a polyketone polymer according to the present invention,
3 is a schematic representation of a polyketone drying system comprising a lump in a polyketone polymer according to the present invention and a mesh screen for removing particles having a large diameter.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the scope of the present invention, but is merely an example, and various modifications can be made without departing from the technical spirit of the present invention.

Fig. 2 is a schematic view showing a process for producing a polyketone polymer according to the present invention. Fig. 3 is a schematic view showing a lump in a polyketone polymer according to the present invention and a mesh screen for removing particles having a large diameter Screen). ≪ / RTI >

As shown in the drawings, a polyketone drying system 1 including a mesh screen according to the present invention comprises a drying device 10 for drying a polyketone polymer powder (not shown) And a powder hopper 30 for storing and discharging the dried polyketone polymer powder through the drying device 10. [

That is, in the polyketone drying system 1 including the mesh screen, the polyketone prepared by the polymerization reaction through a polymerization reactor (not shown) is centrifuged, and the polyketone polymer powder prepared by centrifuging is dried The powder hopper 30 for discharging the polyketone polymer powder by an extrusion process for storing the polyketone polymerized powder dried through the apparatus 10 and the drying apparatus 10 and for extruding the polyketone polymerized powder is integrally formed Respectively.

An injection port 11 for injecting the polyketone polymer powder is formed on the drying device 10 of the drying system 1 and the lower part of the powder hopper 30 is injected into the drying device 10, An outlet 31 for storing and discharging the supplied and dried polyketone polymer powder is formed.

The drying system 1 is preferably provided with a heat source supply device (not shown) such as steam or heating for drying the polyketone polymer powder injected and supplied to the drying device 10, Not.

A mesh screen 50 is interposed between the drying apparatus 10 of the drying system 1 and the powder hopper 30. That is, in order to remove lumps and particles having a large diameter from the dried polyketone polymer powder supplied from the drying device 10 to the powder hopper 30, the drying device 10 and the powder hopper 30 A mesh screen 50 is provided.

By the above-described structure, it is possible to remove only the lump and the particles having a large diameter, which are contained and mixed in the normal diameter polyketone polymer powder dried through the drying device 10.

Here, the mesh screen 50 is formed in a lattice shape, and each lattice (not shown) is made less than 2.0 mm. That is, the polyketone polymerized powder having the normal diameter, which has been dried through the drying device 10, is supplied to the powder hopper 30, and the mesh screen 50 is removed to remove lumps and particles having a large diameter of 2.0 mm or more. Is less than 2.0 mm.

More preferably, the grid formed on the mesh screen 50 is less than 1.6 mm.

According to an embodiment of the present invention, the grid formed on the mesh screen is less than 2.0 mm, but the size of the grid formed on the mesh screen varies depending on the diameter of the lumps and particles contained in and mixed with the polyketone polymer composite powder .

For this purpose, the mesh screen 50 is preferably detachably installed in the drying system 1. The size of the grid formed on the mesh screen 50 may be variously formed and then included in the polyketone polymer powder , A lump to be removed, and a mesh screen 50 suited to the diameter of the particles, respectively, and then to remove lumps and large diameter particles contained in and incorporated in the polyketone polymeric powder.

The drying system 1 is provided with a vibration motor 70 for applying a vibrator to the mesh screen 50. That is, in the drying apparatus 10, the dried polyketone polymer powder is uniformly supplied to the powder hopper 30, and at the same time, the lump to be contained in and mixed with the polyketone polymer powder and the dried The system 1 is provided with a vibration motor 70 for imparting vibration to the mesh screen 50.

Here, the vibration motor 70 is provided on both sides of the drying system 1 and is connected to the mesh screen 50 to transmit and provide vibration to the mesh screen 50, respectively.

The vibration motor 70 is provided on both sides of the drying system 1 and is connected to the mesh screen 50. The position and the number of the vibration motor 70 are But not limited thereto.

The vibration motor 70 is preferably detachably connected to the drying system 1 and the mesh screen 50, but is not limited thereto.

As described above, since the mesh screen 50 is made vibratable by the vibration motor 70, the normal polyketone polymer powder that has been dried in the drying apparatus 10 passes through the mesh screen 50, Is supplied to the powder hopper 30, and abnormal sized lumps and particles contained in and incorporated in the polyketone polymeric powder are filtered through the mesh screen 50.

The lump and particles of abnormal size filtered through the mesh screen 50 are removed from the polyketone polymer powder of normal size by separating the mesh screen 50 from the drying system 1 and collecting it separately.

In the embodiment of the present invention, the drying system 1 is provided with the vibration motor 70, and the vibration motors 70 are supplied from the drying apparatus 10 to the powder hopper 30 to supply the polyketone polymer powder The mesh screen 50 may be moved in a zigzag manner toward the front, rear, left, or right direction by engagement of a motor (not shown) and a gear (not shown) Zigzag), while removing particles having a large diameter and a lump from the polyketone polymer powder at a normal size.

Hereinafter, the operation of the polyketone drying system including the mesh screen according to the present invention will be described.

First, a polyketone polymerization reaction is carried out through a polymerization reactor (not shown). That is, a solvent, a monomer gas and a catalyst are injected into a polymerization reactor to perform a polyketone polymerization reaction.

Here, when a mixed solvent of acetic acid and water is used as a solvent, when the concentration of water is less than 10% by volume, the effect of the catalyst is less affected, but when the concentration is 10% by volume or more, the catalytic activity increases sharply. On the other hand, when the concentration of water exceeds 30% by volume, the catalytic activity tends to decrease. In the present invention, it is preferable to use a mixed solvent comprising 70 to 90% by volume of acetic acid and 30 to 10% by volume of water as the liquid medium.

Examples of the ethylenically unsaturated compound include ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, vinylcyclohexane; Alkenyl aromatic compounds such as styrene and a-methylstyrene; But are not limited to, cyclopentene, norbornene, 5-methylnorbornene, 5-phenylnorbornene, tetracyclododecene, tricyclododecene, tricyclodecene, pentacyclopentadecene, pentacyclohexadecene, Cyclic olefins such as cyclododecene; Vinyl halides such as vinyl chloride; Ethyl acrylate, and acrylates such as methyl acrylate. These ethylenically unsaturated compounds are used singly or as a mixture of plural kinds. Of these, preferred ethylenically unsaturated compounds are a-olefins, more preferably a-olefins having 2 to 4 carbon atoms, and most preferably ethylene.

(A) a ligand having an element of Group 9, 10 or 11 of the Periodic Table (IUPAC Inorganic Chemical Nomenclature, 1989), (b) an element of Group 15, and (c) Is an anion of an acid of 4 or less.

Examples of the Group 9 transition metal compound in the ninth, tenth, or eleventh group transition metal compound (a) include complexes of cobalt or ruthenium, carbonates, phosphates, carbamates, and sulfonates And specific examples thereof include cobalt acetate, cobalt acetylacetate, ruthenium acetate, ruthenium trifluoroacetate, ruthenium acetylacetate, and ruthenium trifluoromethanesulfonate.

Examples of the Group 10 transition metal compounds include complexes of nickel or palladium, carbonates, phosphates, carbamates, sulfonates and the like. Specific examples thereof include nickel acetate, nickel acetylacetate, palladium acetate, Palladium acetate, palladium chloride, bis (N, N-diethylcarbamate) bis (diethylamine) palladium, and palladium sulfate.

Examples of the Group 11 transition metal compound include copper or silver complexes, carbonates, phosphates, carbamates, and sulfonates, and specific examples thereof include copper acetate, copper trifluoroacetate, copper acetylacetate, , Silver trifluoroacetic acid, silver acetyl acetate, trifluoromethanesulfonic acid, and the like.

On the other hand, examples of ligands (b) having a Group 15 atom include 2,2-bipyridyl, 4,4-dimethyl-2,2-bipyridyl, 2,2- (Diphenylphosphino) propane, 1,4-bis (diphenylphosphino) butane, 1-bis (diphenylphosphino) (3-bis [di (2-methylphenyl) phosphino] propane, ] Propane, 1,3-bis [di (2-methoxy-4-sulfonate sodium-phenyl) phosphino] propane, 1,2-bis (diphenylphosphino) cyclohexane, Bis [[(di (2-methoxyphenyl) phosphino] methyl] benzene, 1,2-bis [ Bis (diphenylphosphino) ferrocene, 2-hydroxy-1,3-bis [di (2-methoxy-4-sulfonylphenyl) phosphino] methyl] benzene, Propoxy) propane, 2,2-dimethyl-1,3-bis [di (2-methoxyphenyl) Naphthyl] phosphino] propane, and the like.

Among these ligands, preferred ligands (b) having a Group 15 element are phosphorus ligands having an atom of Group 15, and particularly preferred ligands in terms of yield of polyketone are 1,3-bis [di (2- Methoxyphenyl) phosphino] propane and 1,2-bis [[di (2-methoxyphenyl) phosphino] methyl] benzene, Di (2-methoxyphenyl) phosphino] propane, and it is safe in that it does not require an organic solvent. Soluble sodium salts such as 1,3-bis [di (2-methoxy-4-sulfonic acid sodium-phenyl) phosphino] propane, 1,2- ] Methyl] benzene, and 1,3-bis (diphenylphosphino) propane and 1,4-bis (diphenylphosphino) butane are preferred for ease of synthesis and availability in large quantities and economically.

Here, the ligand (b) having an intrinsic viscosity of the polyketone and an atomic group 15 preferred for emphasis on the improvement of the catalytic activity is 1,3-bis [di (2-methoxyphenyl) 3-bis (diphenylphosphino) propane, and most preferably 1,3-bis [di (2-methoxyphenyl) phosphino] propane.

The amount of the Group 9, Group 10 or Group 11 transition metal compound (a) used varies depending on the kind of the ethylenically unsaturated compound to be selected and other polymerization conditions, and therefore the range But it is usually from 0.01 to 100 mmol, preferably from 0.01 to 10 mmol, per liter of the reaction zone. The capacity of the reaction zone refers to the liquid capacity of the reactor 10.

Examples of the anion (c) of the acid having a pKa of 4 or less include an anion of an organic acid having a pKa of 4 or less such as trifluoroacetic acid, trifluoromethanesulfonic acid, or p-toluenesulfonic acid; Anions of inorganic acids having a pKa of 4 or less such as perchloric acid, sulfuric acid, nitric acid, phosphoric acid, heteropoly acid, tetrafluoroboric acid, hexafluorophosphoric acid, and fluorosilicic acid; And anions of boron compounds such as trispentafluorophenylborane, trisphenylcarbenium tetrakis (pentafluorophenyl) borate, and N, N-dimethylarinium tetrakis (pentafluorophenyl) borate.

As described above, the polyketone prepared by the polymerization reaction is centrifuged and the polyketone polymer powder to be centrifuged is supplied to the polyketone drying system 1 including the mesh screen.

At this time, during the polymerization reaction of the polyketone, a white powder is formed in the solution inside the polymerization reactor, and a fouling phenomenon occurs in which the polyketone polymer is entangled, adhered and attached to the inner wall of the reactor and the stirrer during the polymerization reaction And the generated fouling grows and falls into the polyketone polymer so that particles having a large diameter and a lump are incorporated into the polyketone polymer.

The polyketone polymer powder (not shown) containing and containing the lumps and large diameter particles produced in the polymerization reaction is supplied to the drying system 1 according to the present invention, and the poly The ketone polymer composite powder is supplied into the drying apparatus 10 through the inlet port 11. The polyketone polymer powder supplied to the drying apparatus 10 is supplied to the drying apparatus 10 through a heat source supply apparatus Not shown).

As described above, the polyketone polymerized powder dried through the drying device 10 is supplied to the powder hopper 30 and then discharged through the discharge port 31. The discharged polyketone polymer powder is transferred to an extrusion process do.

The polyketone polymerized powder that has been dried through the drying device 10 is contained in the polyketone polymer powder by a mesh screen 50 interposed between the drying device 10 and the powder hopper 30, After the particles having a large diameter and a lump to be mixed are removed, they are discharged to the powder hopper 30.

That is, when the polyketone polymer powder injected into the drying system 1 is supplied to the powder hopper 30 after drying is completed through the drying device 10, And incorporated into a polyketone polymeric powder of normal size by a mesh screen 50, which only removes lump and particles of abnormal size.

Here, when the lump and the particles having a large diameter are removed from the polyketone polymer powder through the mesh screen 50, the vibration motors 70 provided on both sides of the drying system 1 are driven to rotate the mesh screen 50 And the polyketone polymer powder supplied to the mesh screen 50 is more easily supplied to the powder hopper 30 as the mesh screen 50 vibrates, and at the same time, the polyketone polymer The lumps contained in and contained in the powder and the particles having a large diameter are easily removed.

As described above, the normal polyketone polymerized powder, which has been dried in the drying apparatus 10 by vibrating the mesh screen 50 by the vibration motor 70, passes through the mesh screen 50, 30), and abnormal sized lumps and particles contained and incorporated in the polyketone polymeric powder are filtered through a mesh screen.

On the other hand, the size of each lattice formed on the mesh screen 50 is less than 2.0 mm, so that only lump and particles having an abnormal size of 2.0 mm or more are removed, and only a polyketone polymer powder having a normal size of less than 2.0 mm, (30).

In this way, a lattice of less than 2.0 mm in size is formed, and abnormal sized lumps and particles filtered through the mesh screen 50, which is vibrated by the vibration motor, are separated from the drying system 1 by the mesh screen 50, Is removed from the polyketone polymer powder of normal size by collection.

By removing the lump and the large particle (Big Particle) contained in the polyketone polymerized powder produced through the polyketone polymerization reaction process by the above-described structure and process, the polymer properties can be improved.

Further, it is possible to remove lumps and particles having a large diameter from the polyketone polymer composite powder, thereby reducing tensile properties and physical property deviations of the polyketone, enabling effective continuous removal of lumps and particles having a large diameter, It is possible to reduce the elongation and deviation to the sample.

Meanwhile, in an embodiment of the present invention, a mesh screen 50 is provided between the drying apparatus 10 of the drying system 1 and the powder hopper 30 so as to be vibratable, The vibrating mesh screen 50 may be configured to remove the lump and the large diameter particles from the vibrating mesh screen 50. The vibrating mesh screen 50 may be any type of powder having different diameters in powder form, But it is not limited thereto.

Example 1

The solvent, the monomer gas and the catalyst were injected into the polyketone polymerization reactor.

Thereafter, as shown in FIG. 2 and FIG. 3, a lump and a particle having a large diameter are injected into a polyketone polymer powder drying system containing and mixed therein, and a dried lump, And a polyketone polymer powder containing and containing particles having a large diameter were supplied to a powder hopper through a mesh screen having a mesh size of 1.6 mm which was made vibratable.

Comparative Example 1

The solvent, the monomer gas and the catalyst were injected into the polyketone polymerization reactor.

Thereafter, as shown in FIG. 1, a polyketone polymer composite powder containing a lump and particles having a large diameter is injected into a dryer, and a dried lump and a large diameter And the polyketone polymer powder containing and containing the particles was supplied to a powder hopper.

Comparative Example 1 (elongation at break) Example 1 (elongation at break) Vibratable mesh screen Not applicable Apply Mesh Size (1.6mm) Primary Test 51% 368% Secondary Test 210% 296% Third Test 30% 279% Average 97% 314% Max 210% 368% Min 30% 279%

As shown in Table 1, in Example 1, when the lump and particles having a large diameter were removed from the polyketone polymer powder through the vibratable mesh screen, the elongation at break was higher than that in Comparative Example 1 And the elongation at break of the polyketone polymer powder recovered by the powder hopper is remarkably lowered.

Since the lump and the large diameter particles are present in an unstable state in the polyketone polymerized powder according to Comparative Example 1 and the lump and the particle having a large diameter act as defects upon stretching, It can be seen that the elongation at break is lower than that of the ketone polymer powder.

Therefore, when the polyketone drying system including the mesh screen according to the present invention is applied, it can be seen that the elongation at break is improved as compared with the conventional polyketone polymer powder, and the variation with respect to the sample can be reduced.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. It will be easy for anyone to know.

1: a polyketone drying system comprising a mesh screen,
10: drying device, 11: inlet,
30: powder hopper, 31: outlet,
50: mesh screen, 70: vibration motor.

Claims (1)

1. A drying system for a polyketone polymer powder produced by a polyketone polymerization reaction,
A drying device for drying the polyketone polymer powder;
A powder hopper for storing and discharging the dried polyketone polymer powder through the drying device;
A lump included in the polyketone polymer powder and a particle having a large diameter, which is interposed between the drying device and the powder hopper and repeatedly linearly moved in a zigzag form toward the front, ≪ / RTI > mesh screen; And
And a vibration motor provided on both sides of the drying system to generate vibration on the mesh screen,
Wherein the elongation at break of the polyketone polymer powder is 279 to 368%.

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