WO2015129868A1 - 樹脂製タッピング部材、及びそれを用いた、重合体含有液から重合体を分離回収する分離回収方法 - Google Patents
樹脂製タッピング部材、及びそれを用いた、重合体含有液から重合体を分離回収する分離回収方法 Download PDFInfo
- Publication number
- WO2015129868A1 WO2015129868A1 PCT/JP2015/055895 JP2015055895W WO2015129868A1 WO 2015129868 A1 WO2015129868 A1 WO 2015129868A1 JP 2015055895 W JP2015055895 W JP 2015055895W WO 2015129868 A1 WO2015129868 A1 WO 2015129868A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polymer
- tapping member
- resin
- separation
- resin tapping
- Prior art date
Links
- 229920000642 polymer Polymers 0.000 title claims abstract description 221
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 211
- 239000007788 liquid Substances 0.000 title claims abstract description 120
- 238000000926 separation method Methods 0.000 title claims abstract description 99
- 238000011084 recovery Methods 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 109
- 239000002904 solvent Substances 0.000 claims abstract description 38
- 239000013585 weight reducing agent Substances 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims description 196
- 239000011347 resin Substances 0.000 claims description 196
- 238000007873 sieving Methods 0.000 claims description 64
- -1 polypropylene Polymers 0.000 claims description 28
- 239000000126 substance Substances 0.000 claims description 14
- 239000004743 Polypropylene Substances 0.000 claims description 13
- 229920001155 polypropylene Polymers 0.000 claims description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 12
- 229910052717 sulfur Inorganic materials 0.000 claims description 12
- 239000011593 sulfur Substances 0.000 claims description 12
- 229920000412 polyarylene Polymers 0.000 claims description 11
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 10
- 230000014759 maintenance of location Effects 0.000 claims description 10
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 9
- 229920002530 polyetherether ketone Polymers 0.000 claims description 9
- 229920000306 polymethylpentene Polymers 0.000 claims description 7
- 239000011116 polymethylpentene Substances 0.000 claims description 7
- 239000004952 Polyamide Substances 0.000 claims description 6
- 229920002647 polyamide Polymers 0.000 claims description 6
- 235000012489 doughnuts Nutrition 0.000 claims description 5
- 229920001903 high density polyethylene Polymers 0.000 claims description 5
- 239000004700 high-density polyethylene Substances 0.000 claims description 5
- 239000004642 Polyimide Substances 0.000 claims description 4
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
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- 238000012545 processing Methods 0.000 abstract description 22
- 239000002245 particle Substances 0.000 description 28
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 27
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
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- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
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- 229910052783 alkali metal Inorganic materials 0.000 description 5
- 150000003857 carboxamides Chemical class 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 5
- 239000004800 polyvinyl chloride Substances 0.000 description 5
- 229920000915 polyvinyl chloride Polymers 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
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- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 3
- 229920009204 Methacrylate-butadiene-styrene Polymers 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 229910052977 alkali metal sulfide Inorganic materials 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
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- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 2
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- 239000012535 impurity Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 150000007522 mineralic acids Chemical class 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
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- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000010557 suspension polymerization reaction Methods 0.000 description 2
- WQONPSCCEXUXTQ-UHFFFAOYSA-N 1,2-dibromobenzene Chemical compound BrC1=CC=CC=C1Br WQONPSCCEXUXTQ-UHFFFAOYSA-N 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- OCJBOOLMMGQPQU-UHFFFAOYSA-N 1,4-dichlorobenzene Chemical compound ClC1=CC=C(Cl)C=C1 OCJBOOLMMGQPQU-UHFFFAOYSA-N 0.000 description 1
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229920013633 Fortron Polymers 0.000 description 1
- 239000004738 Fortron® Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 1
- ZWXPDGCFMMFNRW-UHFFFAOYSA-N N-methylcaprolactam Chemical compound CN1CCCCCC1=O ZWXPDGCFMMFNRW-UHFFFAOYSA-N 0.000 description 1
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- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
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- 238000004220 aggregation Methods 0.000 description 1
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- WWNGFHNQODFIEX-UHFFFAOYSA-N buta-1,3-diene;methyl 2-methylprop-2-enoate;styrene Chemical compound C=CC=C.COC(=O)C(C)=C.C=CC1=CC=CC=C1 WWNGFHNQODFIEX-UHFFFAOYSA-N 0.000 description 1
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- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
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- 238000005194 fractionation Methods 0.000 description 1
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- RWSOTUBLDIXVET-UHFFFAOYSA-M hydrosulfide Chemical compound [SH-] RWSOTUBLDIXVET-UHFFFAOYSA-M 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
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- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
- B01D33/03—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
- B01D33/0346—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements
- B01D33/0376—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements supported
- B01D33/0392—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements supported with curved filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/20—Vibrating the filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/06—Cone or disc shaped screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
- B07B1/284—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens with unbalanced weights
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/50—Cleaning
- B07B1/54—Cleaning with beating devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
- B07B13/10—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
- B07B13/14—Details or accessories
- B07B13/16—Feed or discharge arrangements
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/02—Ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/04—Monomers containing three or four carbon atoms
- C08F110/06—Propene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
- C08G75/02—Polythioethers
- C08G75/0204—Polyarylenethioethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
- C08G75/02—Polythioethers
- C08G75/0204—Polyarylenethioethers
- C08G75/0277—Post-polymerisation treatment
- C08G75/0281—Recovery or purification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
- B07B1/38—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens oscillating in a circular arc in their own plane; Plansifters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
Definitions
- the present invention relates to a resin tapping member and a vibrating sieve device from a polymer-containing liquid during or after the polymerization reaction when separating and recovering the polymer obtained by the polymerization reaction in a solvent using the resin tapping member.
- the present invention relates to a separation and recovery method in which a polymer is separated and recovered with high quality, high efficiency, and high throughput by sieving using the above.
- high quality means obtaining a polymer without impairing the quality of the polymer
- high efficiency means, for example, reducing costs due to cooling of the polymer-containing liquid, etc. Is to process quickly and in large quantities.
- PVC Polyvinyl chloride
- MVS methyl methacrylate-butadiene-styrene polymer
- PAS polyarylene sulfide
- Many plastics usually include a polymerization step in which a polymerization reaction is performed in a solvent, a separation / recovery step for separating and recovering the polymer from the polymer-containing liquid after the polymerization step, and a step for drying the separated and recovered polymer. It is manufactured through a drying process.
- the separation and recovery process is also called a post-treatment process, and the quality of the polymer obtained in the polymerization process is improved.
- This is a process for efficiently separating and recovering polymers without damaging them. From the standpoint of continuous operation, it has the ability to exceed the preceding and succeeding polymerization processes and drying processes, and it is separated and recovered with a balance between the capabilities of both processes. Is required to do. Therefore, equipment and devices used in the separation and recovery process are required to have the ability to maintain the quality of the polymer, efficiently and have a high processing speed and throughput.
- filtration separation method using filtration for example, Horizontal belt type vacuum filter
- centrifugal separation method using centrifugal force for example, centrifugal separator
- separation method using vibration of sieve mesh for example, vibration sieve device
- PVC The suspension containing the polymer-containing liquid after suspension polymerization with a centrifuge, and MBS is obtained by adding a polymer-containing liquid (coagulation liquid) obtained by adding an inorganic salt or an inorganic acid to the emulsion solution after polymerization. It is introduced into a vacuum filter and separated and recovered.
- Patent Document 1 a re-published WO 2006-027985 (Patent Document 1) is a polymerization slurry obtained in a polymerization step in which a sulfur source and a dihaloaromatic compound are polymerized in a polar organic solvent. It is described that the (polymer-containing liquid) is cooled to room temperature and sieved using a sieving machine equipped with a horizontal vibration sieve (screen) having a sieve mesh of 105 ⁇ m openings.
- Patent Document 2 describes performing classification using an apparatus.
- Separation and recovery using a centrifuge is characterized by convenience, but because it is a batch-type separation and recovery, there are difficulties in continuation of separation and recovery and improvement in processing capacity. There are problems in terms of quality such that the amount of liquid contained differs from batch to batch and polymer particles that are deformed or broken by centrifugal force are likely to be generated.
- separation and recovery using a horizontal belt type vacuum filter using a filter cloth is a continuous type and has an advantage that the processing capacity can be increased relatively easily depending on operating conditions and the like, but because vacuum suction is performed. In addition, clogging of the polymer particles in the filter cloth tends to occur, which is a serious problem in terms of processing.
- the separation and recovery using the vibration sieve device is a continuous method, and since the sieve screen is vibrated, the occurrence of clogging can be effectively suppressed to some extent, and is an advantageous method for performing separation and recovery. However, the prevention of clogging is still not sufficient.
- Patent Document 1 it is necessary to cool the polymer-containing liquid to be separated and recovered to room temperature, which is a difficulty in terms of efficiency and processing capability.
- the present inventors aim to increase efficiency by setting the polymer-containing liquid during or after the polymerization reaction to be introduced into the separation / recovery device or apparatus to a temperature close to the polymerization reaction temperature, In addition, it has been examined whether it is possible to improve the processing capacity by giving more effective vibration to the sieve screen of the vibration sieve device and further preventing clogging.
- the polymer-containing liquid is introduced into the vibration sieve device at a temperature as high as 30 to 230 ° C.
- the polymer particles are softened as compared with normal temperature, so that the polymer particles are aggregated.
- clogging may occur frequently because it becomes easy or it becomes easy to stick to the sieve screen. That is, there is a concern that improvement of the processing capability is hindered.
- the present inventors give tapping (vibration) by a tapping ball (made of rubber: brilliant) instead of normal horizontal and vertical vibrations as a measure for preventing clogging.
- the temperature is 30 to 230 ° C. If the polymer is separated and recovered from a polymer-containing liquid having a high acidity or alkalinity at a temperature, the tapping ball (made of rubber) may be easily deteriorated.
- the tapping ball (rubber) is worn by the impact and friction of the tapping ball (rubber) hitting a member constituting the vibration sieve device such as a plate, or the tapping ball (rubber) is rubbed by collision or friction between the tapping balls (rubber). Troubles such as a decrease in the weight of the tapping ball (made of rubber).
- the present inventors have intensively studied this new problem, and by using a specific resin tapping member having heat resistance, chemical resistance and wear resistance as a tapping member, separation and recovery can be continuously performed for a long time. Even if it is performed, clogging of the screen can be prevented, and the weight of the tapping member can be reduced by the collision or friction between the tapping members or between the tapping member and the member constituting the vibrating screen device such as the screen.
- Separation and recovery equipment with high efficiency and excellent processing capacity without losing the target quality which can solve the above newly generated problems such as contamination (contamination) of products caused by We have succeeded in providing a separation and recovery method using an apparatus.
- a resin tapping member for preventing clogging of a sieve mesh, which is used when separating and recovering a polymer obtained by a polymerization reaction in a solvent, from a polymer-containing liquid.
- a resin tapping member is provided in which the weight reduction rate of the resin tapping member after separating and recovering the coalescence continuously for 48 hours is 3% by weight or less.
- a resin tapping member having a tensile strength retention of 98% or more after immersing a sample piece molded using a resin forming a resin tapping member in a chemical solution for 1,000 hours. Provided.
- the resin tapping member is at least one selected from the group consisting of polyamide, polyimide, polyetheretherketone, polymethylpentene, high density polyethylene, ultrahigh molecular weight polyethylene, polypropylene, and polyarylene sulfide.
- the resin tapping member which is a resin tapping member formed by including a resin, is provided.
- the resin tapping member is a resin tapping member formed including at least one resin selected from the group consisting of polyetheretherketone, polymethylpentene, polypropylene, and polyarylene sulfide.
- the resin tapping member is provided.
- the above-mentioned resin tapping member in which the shape of the resin tapping member is a cubic shape, a rectangular parallelepiped shape, a plate shape, a columnar shape, a cylindrical shape, a donut shape, a conical shape, or a spherical shape.
- the resin tapping member wherein the shape of the resin tapping member is cylindrical.
- a separation and recovery method for separating and recovering a polymer obtained by a polymerization reaction in a solvent by sieving using a vibrating sieve device from the polymer-containing liquid during or after the polymerization reaction.
- the vibration sieve device is a vibration sieve device in which the resin tapping member for preventing clogging of a sieve mesh is disposed.
- the polymer is a polymer containing sulfur in the main chain of the polymer, and the temperature of the polymer-containing liquid during sieving is 30 to 230 ° C.
- a collection method is provided.
- the separation and recovery method as described above, wherein the polymer is polyarylene sulfide.
- the resin tapping member is arranged between the sieve mesh and the perforated plate arranged at the lower portion of the sieve mesh, There is provided a vibration sieving device for tapping the resin tapping member by vibration of the vibration sieving device to prevent clogging of the sieve mesh.
- the vibration sieving device is a resin tapping of the present invention for preventing clogging of the sieve mesh.
- the vibration sieve device in which the members are arranged the effect of preventing clogging of the sieve mesh, the weight of the tapping member due to collisions or friction between the tapping members or between the tapping members and the members constituting the vibration sieve device such as the sieve mesh, etc.
- the effect of preventing the reduction and contamination (contamination) of the product due to the reduced weight, and the separation and recovery process that enables the use of the polymer-containing liquid at high temperature, resulting in high quality.
- the polymer can be separated and recovered with high efficiency and high throughput.
- Polymerization reaction 1-1 Polymer Vibrating sieve device (hereinafter referred to as “vibrating sieve of the present invention”) in which a resin tapping member for preventing clogging of the sieve mesh is disposed from the polymer-containing liquid during or after the polymerization reaction in the solvent of the present invention.
- the target polymer may be a conventionally known polymer and is subject to special restrictions. is not.
- Polymers classified as so-called general-purpose plastics, engineering plastics or super-engineering plastics can be targeted, but in order to sufficiently exhibit the effects of the present invention, as a polymer, for example, PVC; polystyrene, acrylonitrile-styrene polymer, acrylonitrile-butadiene-styrene polymer, styrene polymer such as MBS; fluorine polymer such as polyvinylidene fluoride and polyvinyl fluoride; polyester such as polyethylene terephthalate and polybutylene terephthalate; Polyamides such as nylon 6, nylon 6-6, nylon-12, etc .; polycarbonate; containing sulfur in the main chain of polymers such as PAS, polyarylene thioether ketone, polysulfone, and polyethersulfone Polymers which may be mentioned.
- PVC polystyrene, acrylonitrile-styrene polymer, acrylonitrile-butad
- the polymer is preferably PVC, a fluoropolymer, a polymer containing sulfur in the main chain of the polymer, and more preferably PAS, polyarylene thioether ketone, polyvinylidene fluoride, polysulfone, polyethersulfone. It is. Particularly preferred is PAS represented by polyphenylene sulfide (hereinafter abbreviated as “PPS”). That is, PAS is suitable as a polymer that is separated and recovered by sieving using the vibration sieving apparatus of the present invention.
- PPS polyphenylene sulfide
- the polymer-containing liquid for separating and recovering the polymer by the separation and recovery method using the vibration sieve device of the present invention is a polymer-containing liquid during or after the polymerization reaction, The polymer obtained by the polymerization reaction is included.
- the polymerization reaction can be carried out by suspension polymerization, emulsion polymerization, It can be suitably performed using solution polymerization, precipitation polymerization, slurry polymerization and the like.
- PAS can be usually obtained by a method for obtaining a known granular PAS.
- the organic amide solvent is adjusted to be in the range of 0.1 to 10 kg.
- NMP N-methyl-2-pyrrolidone
- NMP N-methyl- ⁇ -caprolactam
- 1,3-dialkyl-2-imidazolidinone 1,3-dialkyl-2-imidazolidinone, and the like are preferable.
- sulfur source such as hydrosulfide and alkali metal sulfide, sodium hydrosulfide and sodium sulfide are preferable, and as the dihaloaromatic compound, dichlorobenzene and dibromobenzene are preferable.
- the reaction liquid after polymerization that is, the PAS-containing liquid can be obtained in a slurry state.
- an alkali metal hydrosulfide or a sulfur source containing an alkali metal hydrosulfide and an alkali metal sulfide, and 0.9 to 1.2 mol of alkali metal per mol of the sulfur source By heating a mixed solution containing hydroxide and 0.1 to 10 kg of organic amide solvent at a temperature of 100 to 290 ° C. for 0.5 to 25 hours, moisture and the like are retained from the reaction solution outside the reaction system.
- a dehydration step for adjusting the moisture content to the moisture content in the charging step (1) may be arranged.
- the polymer-containing liquid that is separated and recovered by the separation and recovery method of the present invention is obtained by a polymerization reaction in a solvent, mainly a mixed solution of a polymer and a solvent, a solution, an emulsion, and the like.
- a solvent mainly a mixed solution of a polymer and a solvent, a solution, an emulsion, and the like.
- the monomer that forms the polymer described above is subjected to a polymerization reaction in a solvent.
- a solvent usually used in each polymerization reaction can be used.
- water ketone compounds (for example, acetone, methyl ethyl ketone, etc.), alcohol compounds (for example, methyl alcohol, etc.), benzene compounds, etc. (Eg, benzene, toluene, etc.), chlorine compounds (eg, chlorobenzene, etc.), oxygen compounds (eg, dioxane, etc.), organic amide compounds (eg, dimethylformamide, etc.), etc.
- the solvent can be appropriately selected depending on the target polymer, polymerization reaction, polymerization conditions, and the like.
- the polymerization temperature in the polymerization reaction employed for obtaining the polymer is usually 350 ° C. or less, preferably 50 to 300 ° C., more preferably 60 to 290 ° C.
- the polymerization time for conducting the polymerization reaction is not particularly limited, and may be 0.5 to 50 hours, preferably 1 to 30 hours, more preferably 1.5 to 20 hours.
- the polymerization temperature and the polymerization time can be determined according to the polymer and the polymerization reaction. That's fine.
- the separation / recovery method of the present invention uses a vibrating sieve device from a polymer-containing liquid during or after the polymerization reaction in the separation / recovery method for separating and collecting a polymer obtained by a polymerization reaction in a solvent.
- the polymer-containing liquid used in the separation and recovery of the present invention is a polymerization reaction liquid obtained during or after the polymerization reaction in a solvent, and is a mixed liquid containing a polymer in a liquid that is a solvent. is there. Further, it also includes a mixed solution, a solution, an emulsion, or the like containing a polymer and a solvent in a washing step provided as necessary.
- the polymer in the polymer-containing liquid during or after the polymerization reaction is not limited in its form, and may be in the form of a liquid, lump, mud, granule, particle, or the like. However, in order to perform separation and recovery efficiently and with high throughput, granular materials are preferable, and particles are more preferable.
- the polymer-containing liquid is preferably a polymer particulate-containing liquid, and more preferably a polymer particle-containing liquid.
- the polymerization reaction in the solvent has various methods depending on the characteristics of the monomer, polymer, solvent and the like, the polymerization mode and the polymerization conditions, and the reaction solution during or after the polymerization reaction is usually in a slurry state. And those in a solid-liquid mixed state such as a suspension state, those in an emulsion state, and those in a solution state are known.
- the reaction liquid used in the separation and recovery method of the present invention may be any of the above-mentioned reaction liquids, and those in the solid-liquid mixed state as they are, and those in the emulsion liquid state are, for example, inorganic salts Or a coagulated liquid obtained using an inorganic acid (solid-liquid mixed state), or in a solution state, by precipitating the polymer in a poor solvent to form a solid-liquid mixed state
- the polymer-containing liquid of the present invention can be used.
- the concentration of the polymer contained in the polymer-containing liquid is usually in the range of 5 to 60% by weight, preferably 7 to 55% by weight, more preferably 9 to 50% by weight, particularly preferably 10 to 48% by weight. is there.
- the concentration of the polymer is an important requirement that affects the processing capacity of the vibration sieve device when performing separation and recovery using the vibration sieve device of the present invention.
- the polymer-containing liquid is a polymerization reaction liquid
- the polymer-containing liquid can be provided to the separation and recovery method of the present invention without being diluted or concentrated.
- the solvent used in the polymerization reaction and other solvents may be added for dilution.
- Preferred solvents include water, organic amide solvents, ketones, alcohols and the like.
- the polymer-containing liquid may be subjected to a concentration treatment.
- the solvent can be partially removed by various operations such as fractionation and distillation. These dilution and concentration can further increase the efficiency of separation and recovery and further increase the processing capacity.
- the concentration of the polymer after the polymerization reaction is usually 10 to 35% by weight based on the production conditions and product quality conditions, but concentration by distillation of water and other solvents, or conversely, addition of solvents, etc.
- concentration of the polymer contained in the polymer-containing liquid is preferably in the range of 5 to 60% by weight by dilution by the above.
- Temperature of polymer-containing liquid In the present invention, during or after the polymerization reaction, the polymer-containing liquid when the polymer is separated and recovered by sieving using a vibrating sieve device in which a resin tapping member is placed from the polymer-containing liquid The temperature is 30 to 230 ° C.
- the polymerization temperature of a polymer that is usually known is usually 350 ° C. or less, preferably 50 to 300 ° C., more preferably 60 to 290 ° C.
- the temperature of the polymer-containing liquid is the polymerization temperature during separation and recovery. It can be said that it is a preferable aspect in improving the efficiency in separation and recovery as it is closer to.
- the polymer concentration in the polymer-containing liquid is usually 5 to 60% by weight, preferably 7 to 55% by weight, more preferably 9 to 50% by weight, and particularly preferably 10 to 48% by weight.
- the temperature of the polymer-containing liquid when it is introduced into a vibration sieve device in which a resin tapping member is arranged and sieved is preferably 40 to 200 ° C, more preferably 45 to 190 ° C, still more preferably. 48 to 185 ° C., particularly preferably 50 to 180 ° C.
- Separation and recovery at this temperature combined with a resin tapping member can achieve a synergistic effect of efficiency and processing capacity.
- the temperature of the polymer-containing liquid is less than 30 ° C., time and cost for cooling the polymerization reaction liquid in the middle of the polymerization reaction or after the polymerization reaction are required, and there is a problem in improving efficiency in separation and recovery.
- the temperature of the polymer-containing liquid exceeds 230 ° C., clogging of the sieve screen due to the polymer particles becomes severe at the time of separation and recovery, and aggregation of the polymer particles frequently occurs. Problems such as increased wear and deformation occur.
- the separation and recovery method of the present invention is a method for separating and recovering a polymer from a polymer-containing liquid by sieving using a vibration sieve device of the present invention during or after the polymerization reaction.
- the sieving apparatus is arranged in a separation / recovery process between the polymerization process and the drying process to separate and recover the polymer (hereinafter referred to as “polymerization process ⁇ separation / recovery by the vibration sieving apparatus of the present invention ⁇ drying process”).
- the separation and recovery step using the separation and recovery method of the present invention is arranged between a polymerization step for obtaining a polymer-containing liquid that is a polymerization reaction solution and a drying step for drying the separated and recovered polymer. is there.
- a plurality of vibration sieve devices can be arranged between the polymerization process and the drying process, and the arrangement may be continuous arrangement or discontinuous arrangement, or in series arrangement or parallel arrangement. But it ’s okay. Furthermore, separation / collection using a conventionally known separation / recovery device or apparatus, or cleaning by a cleaning device / device can be used as needed, and can be used in combination with separation / recovery using the vibration sieve device of the present invention. .
- the polymer separated and recovered by the separation and recovery method of the present invention is subjected to a washing step by washing using, for example, water, an alcohol compound, a ketone compound, or a polymerization reaction solvent provided as necessary. It is sent to the drying process.
- the location of the vibration sieve device in the separation and recovery method of the present invention is as follows.
- preferred locations are (1) polymerization step ⁇ separation and recovery by the vibration sieve device of the present invention ⁇ washing step ⁇ drying step, (6) polymerization Process ⁇ Separation and collection by the vibration sieve device of the present invention ⁇ Washing process ⁇ Separation and recovery by the vibration sieve device of the present invention ⁇ Washing process ⁇ Dry process
- the vibrating sieve device used in the separation and recovery method of the present invention is a vibrating sieve device in which a resin tapping member for preventing clogging of the sieve mesh is disposed. That is, the vibration sieve device of the present invention is characterized by being a vibration sieve device in which a resin tapping member for preventing clogging of the sieve mesh is always arranged and provided in the vibration sieve device. As long as the vibration sieve device has this feature, there is no limitation on the structure, specifications, or operating conditions of the vibration sieve device.
- the vibration sieve device of the present invention may be a vibration sieve device in which a known separation / recovery device and the structure and specifications of the device are incorporated in the vibration sieve device having the above characteristics, or a known separation / recovery device. Or a vibration sieve device incorporating the vibration sieve device of the present invention having the above-described characteristics may be used.
- a vibration sieve device of the present invention a polymer-containing liquid inlet, a sieve mesh for separating the polymer from the polymer-containing liquid, and a resin tapping member for preventing clogging of the sieve mesh
- a perforated plate for placing the resin tapping member, a sieve mesh and a vibration source for applying vibration to the resin tapping member, a polymer outlet for discharging the polymer separated by the sieve mesh to the outside of the apparatus
- a vibration sieving device including, as at least a component, a liquid discharge port for discharging the liquid filtered by the sieve screen to the outside of the device.
- the vibration sieve device of the present invention is provided with the above-described components, so that high quality, high efficiency, and high throughput separation and recovery, which is the purpose of the present invention, can be achieved.
- a resin tapping member is disposed between a sieving mesh and a perforated plate disposed under the sieving mesh, and the resin made t It is a vibration sieving device for tapping a tapping member to prevent clogging of the sieve screen.
- the vibration sieve device include a polymer-containing liquid inlet, a sieve mesh for separating the polymer from the polymer-containing liquid, a resin tapping member for preventing clogging of the sieve mesh, A perforated plate for placing the tapping member, a partition provided on the perforated plate, a vibration source for applying vibration to the sieve mesh and the resin tapping member, and a polymer separated by the sieve mesh for discharging the polymer outside the apparatus.
- a polymer discharge port and a liquid discharge port for discharging the liquid separated by the sieve screen to the outside of the apparatus are provided as at least constituent elements, and a resin tapping member is disposed below the sieve screen and the screen mesh.
- the vibration sieving device is disposed between a perforated plate and the resin tapping member is tapped by vibration of the vibration sieving device to prevent clogging of the sieve mesh.
- vibration sieve device examples include a sieve screen inclined type vibration sieve device, a sieve screen horizontal installation type vibration sieve device, a sieve screen circular vibration screen device (hereinafter abbreviated as “circular vibration screen device”), and the like. be able to.
- sieving with a sieve screen inclined vibration sieve device and a sieve screen horizontal installation type vibration sieve device is often used for sieving with sieve mesh openings of about 100 ⁇ m to 10 mm.
- the sieving with a circular vibration sieving apparatus is often used for sieving with a sieve mesh opening of about 20 ⁇ m to 1 mm.
- a vibration sieving apparatus can also be selected depending on the particle size of the obtained polymer.
- vibration sources that generate sieve screen vibration include uniaxial unbalanced weight drive, biaxial unbalanced weight drive, resonance drive, two vibration motor drive, and electromagnetic vibrator drive.
- the vibration source provided in the vibration sieving apparatus of the present invention is preferably a drive source that provides a three-dimensional vibration in which the vibration components in the horizontal direction and the vertical direction are combined to the sieve mesh. In this case, the dispersibility of the feed material and the ability of the particles to pass through the sieve screen are also high.
- a circular vibration sieve device is usually used that uses a uniaxial non-equilibrium weight drive to produce a three-dimensional vibration that combines vibration components in the horizontal and vertical directions.
- the vibration sieve device when the polymer is separated and recovered from the polymer-containing liquid by sieving using a vibration sieve device during or after the polymerization reaction, it is preferable to use a circular vibration sieve device as the vibration sieve device.
- the mesh of the lower screen is set to a particle size of the lower limit.
- Vibrating sieve device that can provide particles on the upper and lower sieve meshes by providing mesh openings and upper sieve mesh openings in two stages with upper limit particle size openings Is used.
- Circular Vibration Sieve Device A circular vibration sieve device, which is a specific example of the vibration sieve device according to the present invention, will be described with reference to FIG.
- the circular vibration sieve device includes a base 2 on which a vibration part 1 indicated by a coil spring 3 is arranged.
- the vibration part 1 is cylindrical and has a bottom.
- a drive source 4 having upper and lower rotating shafts is connected to the bottom so that the upper and lower rotating shafts are concentric and perpendicular to each other, and each of the upper and lower rotating shafts has an upper unbalanced weight 5.
- a lower non-equilibrium weight 6 is attached.
- the vibrator 1 is provided with a polymer-containing liquid inlet 12 at the center of the upper stage, a polymer outlet 13 at the middle side wall, and a liquid outlet 14 at the lower side wall.
- a sieve screen 7, a perforated plate 9, and a liquid recovery plate 11 are provided horizontally from the top in the middle.
- the liquid recovery plate 11 has a conical shape in which the liquid flows from the center to the periphery.
- the polymer discharge port 13 is provided in contact with the upper surface of the sieve mesh 7 and is provided so that the polymer on the sieve mesh can be discharged out of the apparatus.
- the perforated plate 9 is provided close to the sieve screen 7, that is, at a height at which the resin tapping member 8 can be tapped.
- the perforated plate 9 is provided with a partition 10 in a circular shape so that the resin tapping member 8 is not unevenly distributed due to vibration.
- the height of the partition 10 is high enough to approach the sieve screen 7.
- the liquid discharge port 14 is provided in contact with the upper surface of the liquid recovery plate 11 so that the liquid on the liquid recovery plate 11 can be discharged out of the apparatus.
- the upper non-equilibrium weight 5 When the upper and lower rotating shafts rotate, the upper non-equilibrium weight 5 generates horizontal vibration in the sieve mesh 7 and rotates the polymer, for example, polymer particles, separated from the polymer-containing liquid and remaining on the sieve mesh. Play the role of moving in the direction.
- the lower non-equilibrium weight 6 generates a vertical vibration in the sieve mesh 7 and serves to move a polymer, for example, polymer particles, separated from the polymer-containing liquid and remaining on the sieve mesh in the outer circumferential direction.
- the polymer on the sieve screen is sequentially and continuously discharged from the polymer discharge port by the vibration of the circular vibration sieve device. Therefore, in the circular vibration sieve device, it is possible to process the polymer-containing liquid quickly and in large quantities during or after the polymerization reaction.
- the sieving net is an important member that divides the polymer into an upper part and a lower part of the screen with a certain particle size as a boundary in the case of polymer particles, for example.
- a metal wire such as a fine stainless steel wire or a synthetic resin fiber (monofilament or multifilament) such as polyamide is used.
- a synthetic resin fiber such as polyamide
- the sieve mesh is usually 0.5 to 2.5 m, preferably 0.6 to 2.0 m, more preferably 0.7 to 1.5 m. If the diameter of the sieve screen is too small, the throughput will be reduced, and if it is too large, the propagation of vibration will not be uniform.
- Perforated plate As the perforated plate provided in the lower part of the sieve screen, a metal plate such as stainless steel provided with punched holes is used. In some cases, a metal net such as stainless steel can be used. In a circular vibratory sieve device, when a sieve screen with a diameter of 0.5 to 2.5 m is used, holes with a diameter of about 8 to 15 mm are staggered on the metal plate, and the opening ratio is about 55 to 75%. A punched shape is preferred. If the opening rate of the holes in the perforated plate is within this range, the solvent containing the polymer-containing liquid is easily filtered out from the vibrating screen outlet, and the processing capacity Can be increased.
- the size and shape of the hole to be opened in the perforated plate may be changed.
- a partition made of the same metal as the perforated plate or a different metal or plastic may be provided on the perforated plate so that the resin tapping member is not unevenly distributed due to vibration.
- the partitions are preferably circular concentric circles and are provided in multiple.
- the height of the partition can be appropriately determined depending on the distance between the sieve screen and the perforated plate, the height of the resin tapping member, the concentration of the polymer-containing liquid, the charging speed of the polymer-containing liquid, or the like.
- the height of the partition is preferably 10 to 40%, preferably 15 to 35%, more preferably 17 to 33% of the interval between the sieve screen and the perforated plate.
- the resin tapping member of the present invention is a resin tapping member that is formed to contain a specific resin and is arranged for preventing clogging of a sieve mesh, and a perforated plate of a vibration sieve device Between the sieve screens, specifically, they are arranged at an appropriate density in a sieve screen and a perforated plate partitioned by a partition.
- Material of Resin Tapping Member (1) Resin The resin of the present invention, which is formed to contain a specific resin when the polymer is separated and recovered from the polymer-containing liquid by sieving during or after the polymerization reaction As characteristics required for the tapping member, heat resistance, chemical resistance, and wear resistance are particularly important. Heat resistance can be determined by thermal characteristics such as melting point, glass transition temperature (thermal deformation temperature) or melt crystallization temperature. Chemical resistance and abrasion resistance can be determined as well-known resin characteristics. Furthermore, as described above, since the impact is applied to the sieve screen by tapping, a certain hardness is also required. Moreover, in order not to damage the sieve screen, a certain degree of flexibility is also required.
- the melting point or heat distortion temperature of the resin as a basic characteristic of the resin forming the resin tapping member is 120 ° C. to 400 ° C., preferably 150 ° C. to 380 ° C., more preferably 200 ° C. to 370 ° C.
- the one having a temperature of 250 ° C. to 360 ° C. is preferably used because of its wear resistance and resistance to deformation.
- Those having a melting point exceeding 400 ° C. can be used, but their use may be restricted in terms of moldability and the like.
- the range of the specific gravity of the resin is usually 0.8 to 1.9, preferably 0.9 to 1.85, more preferably 0.95 to 1.8, and still more preferably 0.97 to 1. .7. If the specific gravity is too high, it is not preferable because the screen is broken or damaged due to collision between tapping members. If it is low, the tapping effect is lowered, and if it is cylindrical or columnar, it tends to fall over.
- the present inventors have made extensive studies on the resin tapping member from the viewpoint of the above characteristics, and the resin tapping member includes polyamide, polyimide, polyetheretherketone, polymethylpentene, high density polyethylene, ultrahigh molecular weight polyethylene, and polypropylene. And a resin tapping member formed by including at least one resin selected from the group consisting of polyarylene sulfides.
- the resin tapping member is preferably a resin tapping member formed including at least one resin selected from the group consisting of polyetheretherketone, polymethylpentene, polypropylene, and polyarylene sulfide.
- Polyamide (hereinafter abbreviated as “PA”) is a polymer having an amide bond in the polymer main chain.
- the melting point is around 120-260 ° C.
- the specific gravity is around 1.14.
- Polyimide (hereinafter abbreviated as “PI”) is a polymer having an imide bond in the polymer main chain.
- the heat distortion temperature is around 250 ° C.
- Polyetheretherketone (hereinafter abbreviated as “PEEK”) is a crystalline thermoplastic resin in which ether-ether-ketone bonds are arranged in the polymer main chain.
- the melting point is around 330 ° C.
- the specific gravity is around 1.30.
- Polymethylpentene (hereinafter abbreviated as “PMT”) is a thermoplastic resin obtained by polymerizing 4-methylpentene-1.
- the melting point is around 220-240 ° C.
- High density polyethylene (hereinafter abbreviated as "HDPE") has a density of 0.942 g / cm 3 or more, preferably 0.96 g / cm 3 or more polyethylene.
- the melting point is around 120 to 140 ° C.
- the specific gravity is around 0.95.
- Ultra high molecular weight polyethylene (hereinafter abbreviated as “UHPE”) is a polyethylene having a molecular weight of 1,000,000 or more, preferably 1,000,000 to 9,000,000.
- the melting point is around 128 to 136 ° C.
- Polypropylene (hereinafter abbreviated as “PP”) has a melting point of around 135 to 165 ° C.
- the specific gravity is around 0.90 to 0.91.
- PAS especially PPS
- PAS has a melting point of around 280 ° C. and a specific gravity of around 1.33.
- PAS includes polymers containing sulfur in the main chain of polymers such as PPS, polyketone sulfide, polyketone ketone sulfide, PAS-polyketone sulfide block polymer, polysulfone, and polyethersulfone. .
- the polymer separated from the polymer-containing liquid and the material of the resin tapping member are the same, for example, even if the resin tapping member is worn or damaged during the separation and recovery, that is, the product is removed by tapping. Even if a polymer tapping member is worn or damaged, the risk of becoming an impurity for the product is small and preferable.
- a resin tapping member that includes PAS, specifically, PPS.
- PPS polymer-containing liquid containing PAS
- the resin-made tapping member of the present invention is formed including a specific resin, and is preferably formed without any other components than this resin as much as possible. In the range that does not impair the properties, other components such as fillers, other polymer materials, and other additives can be blended.
- the filler may be an inorganic fibrous material; a metallic fibrous material; an organic fibrous material formed from a high melting point resin; The above can be used in combination.
- thermoplastic material other than the above-described resin which is stable at a high temperature
- the blending ratio of the polymer material other than the resin forming the resin tapping member of the present invention is usually 10 parts by weight or less with respect to 100 parts by weight of the resin. Furthermore, various additives can be mix
- the shape of the resin tapping member of the present invention may be any shape such as a cubic shape, a rectangular parallelepiped shape, a plate shape, a columnar shape, a cylindrical shape, a donut shape, a conical shape, or a spherical shape. it can.
- the through hole is the same as a column provided in the axial direction of the column.
- the donut shape is a shape in which a cylinder forms a ring.
- a donut shape or a spherical shape has no protrusion and is not easily worn.
- the particle shape is often uneven, so that the plate-like, columnar or cylindrical shape has an effect of preventing clogging due to the edge effect.
- a cylindrical shape is preferable from the viewpoints of efficiency and operability during separation and recovery.
- the size of the resin tapping member is usually 20 to 80 mm in length, 30 to 100 mm in width, and 10 in height in the case of a plate shape, for example. In the range of 25 to 70 mm in length, 35 to 85 mm in width, and in the range of 12 to 40 mm in height, and more preferably in the range of 30 to 60 mm in length, 40 to 80 mm in width, and 15 to 35 mm in height. It is a range.
- the diameter is usually in the range of 20 to 70 mm, preferably in the range of 25 to 60 mm, and more preferably in the range of 30 to 55 mm.
- the outer diameter is usually 20 to 100 mm, the inner diameter is 19 to 99 mm, the height is 10 to 150 mm, the thickness is 0.5 to 20 mm, preferably the outer diameter is 25 to 90 mm, and the inner diameter is 24. 89 mm, height 12-100 mm, thickness 0.75-17 mm, more preferably 30-80 mm outer diameter, 29-79 mm inner diameter, 15-85 mm height, 1.0-1.0 mm thickness More preferably, the outer diameter is 35 to 70 mm, the inner diameter is 34 to 69 mm, the height is 17 to 70 mm, and the thickness is 1.2 to 10 mm.
- the ratio of the height to the outer diameter is usually 0.1 to 1.5, preferably 0.2 to 1.3, more preferably 0.25 to 1.2. If it is too small, the tapping efficiency will decrease, and if it is too large, it will fall easily.
- the resin tapping member may be solid or hollow.
- the resin tapping member may have a through hole.
- This through hole is preferable because it facilitates the flow of a liquid obtained by sieving the polymer-containing liquid with a sieve mesh.
- a plurality of through holes may be provided. If a cylindrical hole is provided with a through hole along the axis of the cylinder, it becomes a cylinder.
- the size of the resin tapping member in particular, the height and the cross-sectional size of the resin tapping member can be appropriately determined depending on the interval between the sieve mesh and the perforated plate, the area of the sieve mesh, and the like.
- the height and the cross-sectional size are set such that the tapping of the resin tapping member accompanying vibration is appropriately performed.
- (K ⁇ H) / H is usually 0.1 to 1, preferably 0.12 to 0.8, More preferably, it is 0.13 to 0.7, and particularly preferably 0.15 to 0.5.
- the resin tapping member When the distance between the upper end of the arranged resin tapping member and the sieve mesh is small, the tapping effect is lowered, and when the distance is large, the resin tapping member may roll over.
- the height of the cylinder if the height of the cylinder is too low compared to the distance between the sieve mesh and the perforated plate, the cylinder will fall, a liquid pool will form around it, and the amount of sieving will drop rapidly.
- the overturn is also affected by the height and bottom area of the tapping member, the concentration of the polymer-containing liquid, the charging speed, and the like.
- Fig. 2 shows the case of a cylindrical resin tapping member.
- the density of the arrangement of the resin tapping members depends on the distance between the sieve mesh and the perforated plate, the distance between the resin tapping members, and the size of the resin tapping member. Is 10% to 90%, preferably 20% to 80%, more preferably 30% to 70% of the area of the sieve mesh.
- the resin tapping member is arranged so that the cross-sectional area is maximized.
- the through-hole is preferably arranged so as to be perpendicular to the screen surface.
- the shape of the resin tapping member is cylindrical, it is preferable to arrange the opening of the cylinder so as to face the screen surface.
- the resin tapping member of the present invention has excellent characteristics such as heat resistance, chemical resistance, abrasion resistance, hardness, etc.
- the weight reduction rate of the tapping member when the polymer-containing liquid is continuously separated and recovered for a certain period of time is determined by measuring the tensile strength retention rate of the resin tapping member (that is, the tensile strength retention rate when a sample piece molded using the resin forming the resin tapping member is immersed in a chemical solution for a certain period of time). can do.
- it includes intermittent separation and collection, and setting the total time to a certain period.
- the weight reduction rate after continuously separating and recovering the polymer from the polymer-containing liquid for 48 hours is usually 3% by weight or less, preferably 2% by weight or less, more preferably 1.5% by weight or less, more preferably 1% by weight or less.
- the weight reduction rate after 48 hours when the polymer-containing liquid is continuously separated and recovered is 0.8 wt. % Or less, preferably 0.5% by weight or less, more preferably 0.2% by weight or less, particularly preferably 0.1% by weight or less, and most preferably the weight reduction rate is 0% by weight. If the weight reduction rate exceeds 3% by weight, the resin tapping member will be damaged due to collision and wear, and it will not be able to withstand long-term separation and recovery, and it will also affect the contamination of the product (contamination). Is big.
- the tensile strength retention after dipping for 1000 hours of a sample piece molded using the resin forming the member is usually 98% or more, preferably 98.5. % Or more, preferably 99.0% or more, more preferably 99.5% or more, particularly preferably 99.7% or more, and most preferably 100%.
- This tensile strength retention is a numerical value calculated from the tensile strength before and after dipping the dumbbell piece for measurement in a chemical solution for 1,000 hours.
- the chemical solution can be appropriately selected in consideration of the components of the resin and the polymer-containing liquid contained in the resin tapping member, for example, an 80 ° C. 10 wt% HCl aqueous solution, an 80 ° C. 10 wt% NaOH aqueous solution, 80 ° C., 50 wt% NaOH aqueous solution, 40 ° C. acetone, and the like.
- the amount of height reduction after 200 hours when the polymer-containing liquid is continuously separated and recovered is usually 2.0 mm or less, preferably 1.5 mm.
- it is 1.0 mm or less, more preferably 0.8 mm or less, particularly preferably 0.7 mm or less, and most preferably the height reduction amount is 0 mm.
- the resin tapping member can be produced by a thermoplastic resin molding processing equipment and a molding processing method. Specifically, (a) a resin and other components as necessary are mixed, kneaded using a single or twin screw extruder, extruded to form pellets for molding, and then injection molded or extruded. Examples thereof include a method of molding, (b) a method of mixing a resin and other components added as necessary, and directly injection-molding or extruding.
- the average particle diameter is 200 mesh (aperture 75 ⁇ m), 150 mesh (aperture 106 ⁇ m), 100 mesh (aperture 150 ⁇ m), 60 mesh (aperture 250 ⁇ m). , 32 mesh (aperture 500 ⁇ m), 24 mesh (aperture 710 ⁇ m), 16 mesh (aperture 1,000 ⁇ m), 12 mesh (aperture 1,400 ⁇ m), and 7 mesh (aperture 2,830 ⁇ m)
- the sieves were stacked and the polymer sample was placed on the top sieve and measured.
- Weight reduction rate was measured using a circular vibration device for testing a scale having a diameter of 1/5 of the circular vibration device used in Examples and Comparative Examples (sieving screen, perforated plate, resin The tapping member made is the same as in the examples and comparative examples), and in order to observe the effect of the processing speed of the polymer-containing liquid at 80 ° C. within the processing speed in the range of 5 to 500 kg / hour, While changing (the total average processing speed is 30 kg / hour), the weight reduction rate of the resin tapping member after 48 hours of continuous separation and recovery was measured. The weight was calculated from the weight before separation / recovery of one resin in which the total amount of the three resin tapping members was 1 / and the weight after 48 hours.
- the tensile strength retention rate is in accordance with ASTM D-638, and a measurement dumbbell piece is made of a resin used for a resin tapping member and immersed in a chemical solution for 1,000 hours to obtain an initial tensile strength. And the tensile strength retention rate was calculated from the tensile strength after 1,000 hours.
- the height reduction amount was obtained by measuring the height reduction amount after separation and recovery of the resin tapping member for a total of 200 hours.
- the obtained resin tapping members were PPS resin tapping member A (outer diameter 48 mm, inner diameter 42 mm, thickness 3 mm, height 25 mm), PPS resin tapping member B (outer diameter 48 mm, inner diameter 42 mm, thickness 3 mm, height). 47 mm).
- the vibration sieve device used in Examples and Comparative Examples was a circular vibration sieve device having a sieve mesh diameter of 0.9 m.
- the sieve screen was a stainless mesh screen of 100 mesh (a sieve opening of 150 ⁇ m).
- As the perforated plate a hole having a diameter of 10 mm was formed in a stainless steel plate with an aperture ratio of 65%.
- the interval between the sieve mesh and the perforated plate was 32 mm and the height of the partition was 9 mm, and the interval between the sieve mesh and the perforated plate was 64 mm and the height of the partition was 14 mm. .
- the partition was arranged as a double circle, and the resin tapping member was arranged in three layers.
- the total cross-sectional area of the resin tapping member was 60% of the sieve mesh area.
- Example 1 After completion of the polymerization reaction of Production Example 1, the polymer-containing liquid was cooled to 80 ° C. and then sieved using the above-described circular vibration sieve device. In this case, the distance between the sieve screen and the perforated plate was 32 mm, and the partition height was 9 mm.
- the resin tapping member A produced in Production Example 2 (outer diameter 48 mm, inner diameter 42 mm, thickness 3 mm, height 25 mm) was employed as the resin tapping member. Due to the vibration, the polymer (PPS) on the upper part of the sieve mesh was sequentially discharged.
- the separated polymer was washed with acetone three times and washed with water three times. This granular polymer was washed once with an acetic acid aqueous solution adjusted to pH 4, and further washed with water three times to obtain a washed polymer (washing step).
- the washed polymer was dried at 100 ° C. overnight (drying process). The average particle size was 533 ⁇ m. Such a manufacturing process was repeated until the total time of sieving reached 48 hours. After 48 hours, the PPS resin tapping member A did not fall. Further, the resin tapping member A was not visually deformed. On the other hand, the weight reduction rate of the resin tapping member was 0.0%.
- Example 2 After completion of the polymerization reaction of Production Example 1, the polymer-containing liquid was cooled to 80 ° C. and then sieved using the above-described circular vibration sieve device. In this case, the distance between the sieve screen and the perforated plate was 64 mm, and the partition height was 14 mm.
- the resin tapping member B manufactured in Production Example 2 (outer diameter 48 mm, inner diameter 42 mm, thickness 3 mm, height 47 mm) was employed as the resin tapping member. Due to the vibration, the polymer (PPS) on the upper part of the sieve mesh was sequentially discharged.
- Example 1 As in Example 1, when the total sieving time was 48 hours, the tapping member B made of PPS resin was not overturned. Further, the resin tapping member B was not visually deformed. On the other hand, after 48 hours, the weight reduction rate of the resin tapping member was 0.0%.
- Example 1 The rest was the same as in Example 1 except that no resin tapping member was used. In this case, the processing amount when the total time of sieving was 48 hours was considerably smaller than that in Examples 1 and 2.
- the tapping member was worn even when visually observed. Further, an eraser-like foreign matter was mixed in the collected PPS. On the other hand, when the total sieving time was 48 hours, the weight reduction rate was 22%.
- Example 3 The same procedure as in Example 2 was performed except that the PPS resin tapping member A was used instead of the PPS resin tapping member B. In this case, assuming that the height of the resin tapping member is H and the distance between the sieve mesh and the perforated plate is K, (K ⁇ H) / H is 1.56. After 24 hours, 25% had fallen, a liquid pool was formed, and the sieving ability (processing ability) dropped extremely.
- Example 3 The experiment was performed in the same manner as in Example 1 except that the tapping member C made of general-purpose PP resin was used instead of the PPS resin tapping member A. Even when the total sieving time exceeded 200 hours, the height of the resin tapping member was reduced only by 0.7 mm.
- Example 4 The experiment was performed in the same manner as in Example 1 except that the tapping member D made of general-purpose PE resin was used instead of the PPS resin tapping member A.
- the total sieving time was 200 hours, the height of the resin tapping member was reduced only by about 1 mm. In this case, PE shavings-like contamination was observed.
- Example 5 Using the PPS used in Production Example 2, a measurement dumbbell piece was produced and immersed in the chemical solution shown in Table 1 for 1,000 hours. The results are shown in Table 1.
- Example 6 The same shape of the tapping member E made of the tapping members A, C, D, and PEEK was immersed in a 40 wt% NaOH aqueous solution at 50 ° C. for 100 hours, and then the same experiment as in Example 1 was performed. After the total time of sieving passed 100 hours, the long-term availability of each tapping member was checked. All of A, C, and E had no change in appearance, and no change was observed in strength or the like. For D, a slight decrease in strength was observed.
- Example 7 The tapping members A, C, D and E were immersed in acetone at 40 ° C. for 50 hours, and then the experiment was performed in the same manner as in Example 1. After the total time of sieving passed 100 hours, the long-term availability of each tapping member was checked. Both A and E had no change in appearance, and no change was observed in strength or the like. A slight decrease in strength was observed for C, and a certain decrease in strength was observed for D.
- Example 1 and 2 since it is performed at a high temperature, it does not take a cooling time, can be screened with high efficiency, and can be operated continuously for a long time. I was able to handle it. Further, the wear of the PPS resin tapping member is small. Furthermore, it can be seen from Examples 3 and 4 that the wear resistance of the resin tapping member is excellent. From Example 5, it can be seen that PPS is suitable as a resin for a resin tapping member even under conditions of various chemical solutions. It can be seen from Examples 6 and 7 that the tapping member made of PPS resin has excellent chemical resistance against chemicals such as NaOH aqueous solution and acetone.
- the resin tapping member of the present invention is used when separating and recovering a polymer from a polymer-containing liquid by sieving using a vibrating sieve device during or after the polymerization reaction, In addition, clogging of the screen can be prevented, and the weight of the tapping member can be reduced due to wear or collision between the tapping members or between the tapping members and the members constituting the vibrating screen device such as the screen, and contamination of the product ( (Contamination) and other problems are solved, enabling separation and recovery with high quality, high efficiency, and high throughput.
- the resin tapping member of the present invention is useful when separating and recovering PAS particles in PAS production.
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Abstract
Description
1-1.重合体
本発明の溶媒中での重合反応途中または重合反応後に、重合体含有液から、篩網の目詰まり防止用の樹脂製タッピング部材を配置する振動篩装置(以下、「本発明の振動篩装置」あるいは「振動篩装置」と略記)を用いる篩分けによって重合体を分離回収する方法において、対象とする重合体は、従来知られている重合体であればよく、特段の制限を受けるものではない。
本発明の振動篩装置を用いる分離回収方法により、重合体を分離回収する重合体含有液は、重合反応途中や重合反応後の重合体含有液であって、溶媒中での重合反応によって得られる重合体を含んでいる。
PASは、通常、公知の粒状PASを得る方法で得ることができる。
一つの例として、下記の工程(1)、(2);
(1)有機アミド溶媒、アルカリ金属水硫化物またはアルカリ金属水硫化物とアルカリ金属硫化物を含む硫黄源、アルカリ金属水酸化物、水分、及びジハロ芳香族化合物を含有する仕込み混合物を調整する仕込み工程(1);
その際、硫黄源1モル当りの各成分の割合は、アルカリ金属水酸化物が0.95~1.15モル、水分が0.01~2モル、ジハロ芳香族化合物が0.95~1.15モル、有機アミド溶媒が0.1~10kgの範囲となるよう調整する。なお、有機アミド溶媒としては、N-メチル-2-ピロリドン(以下、「NMP」と略記)、N-メチル-ε-カプロラクタム、1,3-ジアルキル-2-イミダゾリジノン等が好ましく、アルカリ金属水硫化物やアルカリ金属硫化物等の硫黄源としては、水硫化ナトリウムや硫化ナトリウム等が好ましく、またジハロ芳香族化合物としては、ジクロロベンゼンやジブロモベンゼン等が好ましい。
本発明の分離回収方法により分離回収を行う重合体含有液は、溶媒中での重合反応により得られる、主に、重合体と溶媒との混合液、溶解液、乳化液等であって、例えば、前記した重合体を形成する単量体を溶媒中で重合反応させるものである。
前記重合体を得るために採用されている重合反応での重合温度は、通常350℃以下、好ましくは、50~300℃、より好ましくは60~290℃である。
本発明の分離回収方法は、溶媒中での重合反応により得られた重合体を分離回収する分離回収方法における、重合反応途中または重合反応後に、重合体含有液から振動篩装置を用いる篩分けによって重合体を分離回収する分離回収方法であって、該振動篩装置が、篩網の目詰まり防止用の本発明の樹脂製タッピング部材を配置する振動篩装置である分離回収方法である。
本発明の分離回収に用いる重合体含有液は、溶媒中での重合反応途中や重合反応後に得られる重合反応液であり、溶媒である液体中に重合体を含有する混合液である。また、必要に応じて設けられる洗浄工程での重合体や溶媒を含む混合液、溶解液あるいは乳化液等も含むものである。
好ましい溶媒としては、水、有機アミド溶媒、ケトン、アルコール等がある。
これら、希釈や濃縮によって、分離回収の高効率化や処理能力を更に高めることができる。
本発明において、重合反応途中または重合反応後に、重合体含有液から樹脂製タッピング部材を配置する振動篩装置を用いる篩分けによって重合体を分離回収する際の重合体含有液の温度は、30~230℃である。
本発明の分離回収方法は、重合反応途中または重合反応後に、重合体含有液から、本発明の振動篩装置を用いる篩分けによって重合体を分離回収する方法であるので、振動篩装置は、重合工程と乾燥工程との間の分離回収工程に配置されて、重合体の分離回収が行われる(以下、「重合工程→本発明の振動篩装置による分離回収→乾燥工程」と表示する)。すなわち、本発明の分離回収方法を用いる分離回収工程は、重合反応液である重合体含有液を得る重合工程と、分離回収された重合体を乾燥処理する乾燥工程の間に配置されるものである。
(2)重合工程→本発明の振動篩装置による分離回収→他の分離回収機器や装置による分離回収→洗浄工程→乾燥工程
(3)重合工程→他の分離回収機器や装置による分離回収→本発明の振動篩装置による分離回収→洗浄工程→乾燥工程
(4)重合工程→本発明の振動篩装置による分離回収→洗浄工程→他の分離回収機器や装置による分離回収→乾燥工程
(5)重合工程→他の分離回収機器や装置による分離回収→洗浄工程→本発明の振動篩装置による分離回収→洗浄工程→乾燥工程
(6)重合工程→本発明の振動篩装置による分離回収→洗浄工程→本発明の振動篩装置による分離回収→洗浄工程→乾燥工程
本発明の分離回収方法において用いられる振動篩装置は、篩網の目詰まり防止用の樹脂製タッピング部材を配置する振動篩装置である。すなわち、本発明の振動篩装置は、振動篩装置内に、篩網の目詰まり防止用の樹脂製タッピング部材が必ず配置、備えられている振動篩装置であることに特徴を有するものであって、この特徴を有する振動篩装置であれば、振動篩装置の構造、仕様あるいは運転条件等何ら制限を受けるものではない。従って、本発明の振動篩装置は、上記特徴を有する振動篩装置に、公知の分離回収機器や装置の構造、仕様等を組み入れた振動篩装置でもあってもよいし、あるいは公知の分離回収機器や装置に、上記特徴を有する本発明の振動篩装置を組み入れた振動篩装置であってもよい。
本発明に係る振動篩装置の具体例である円形型振動篩装置について、図1を参照して説明する。
振動篩装置を用いた篩分けにおいて、篩網は、重合体を、例えば、重合体粒子の場合、一定の粒径を境に、篩上と篩下に分ける重要な部材である。
篩網の下部に設けられる穴あき板は、打ち抜き穴を設けたステンレス等の金属板が用いられる。場合によっては、ステンレス等の金属網を用いることもできる。円形型振動篩装置において、篩網を直径0.5~2.5mのものを用いた場合、金属板に、直径8~15mm程度の穴を千鳥状に、開孔率55~75%程度で打ち抜いた形状のものが好ましい。穴あき板に開けられた穴の開孔率が、この範囲内であると重合体含有液を濾別した溶媒の液排出口からの振動篩装置外への排出が容易なものとなり、処理能力を高めることができる。
本発明の樹脂製タッピング部材は、特定の樹脂を含んで形成される、篩網の目詰まり防止用に配置される樹脂製タッピング部材であって、振動篩装置の穴あき板と篩網の間に、具体的には、篩網と仕切りで仕切られた穴あき板との中に、適切な密度で配置される。
(1)樹脂
重合反応途中または重合反応後に、重合体含有液から、篩分けによって重合体を分離回収する際に、特定の樹脂を含んで形成される、本発明の樹脂製タッピング部材に求められる特性としては、耐熱性、耐薬品性、及び耐摩耗性が、特に重要である。耐熱性は、融点、ガラス転移温度(熱変形温度)あるいは溶融結晶化温度等の熱的特性で判別できる。耐薬品性、耐摩耗性は、周知の樹脂の特性として判別できる。さらに、タッピングによって、前述のとおり、篩網に衝撃を与えるのであるから、一定の硬度も要求される。また、篩網を傷つけないためには、一定の柔軟性も必要である。
本発明の樹脂製タッピング部材は、特定の樹脂を含んで形成されるものであり、この樹脂以外の成分をなるべく含まないで形成されるのが好ましいが、本発明の目的を損わない範囲において、フィラー、他の高分子材料、他の添加剤等のその他の成分を配合することができる。
本発明の樹脂製タッピング部材の形状は、立方体状、直方体状、板状、円柱状、円筒状、ドーナツ状、円錐状、または球状等のいかなる形状のものとすることができる。円筒状の場合は、貫通孔が、円柱の軸方向に設けてある円柱と同じことになる。ドーナツ状は、円柱が輪を作った形状である。ドーナツ状や球状は、突起部分がなく、摩耗しにくい形状である。重合体含有液に含有される重合体が粒状PASの場合、その粒子形状は凸凹している場合が多いので、板状、円柱状、円筒状であるとエッジ効果による目詰まり防止効果がある。中でも、円筒状であるものが、分離回収時の効率や運転性等の観点から好ましい。
本発明の樹脂製タッピング部材は、耐熱性、耐薬品性、耐摩耗性、硬度等の特性に優れているものであり、これらの特性を有するものであることの指標として、本発明の樹脂製タッピング部材が配設された振動篩装置を用いて、重合体含有液を一定時間連続して分離回収したときの該タッピング部材の重量減少率、あるいは、樹脂製タッピング部材の引張強度保持率(すなわち、樹脂製タッピング部材を形成する樹脂を用いて成形した試料片を薬液に一定時間浸漬した時の引張強度保持率)を測定することにより判定することができる。一定時間連続して行う場合には、断続的に分離回収を行い、その通算時間を一定時間とすることも含む。
樹脂製タッピング部材は、熱可塑性樹脂の成形加工設備と成形加工方法により作製することができる。具体的には、(a)樹脂と必要に応じてその他の成分とを混合し、1軸または2軸の押出機を使用して混練し、押し出して成型用ペレット化した後、射出成形あるいは押出成形する方法、(b)樹脂と必要に応じて加えられるその他の成分を混合し、直接、射出成形あるいは押出成形する方法等が挙げられる。
平均粒子径は、JIS K-0069に従い、下から200メッシュ(目開き75μm)、150メッシュ(目開き106μm)、100メッシュ(目開き150μm)、60メッシュ(目開き250μm)、32メッシュ(目開き500μm)、24メッシュ(目開き710μm)、16メッシュ(目開き1,000μm)、12メッシュ(目開き1,400μm)、及び7メッシュ(目開き2,830μm)の9つの篩を積み重ね、一番上の篩にポリマー試料を載せ、測定を行った。
重量減少率は、実施例・比較例に用いた円形型振動装置の1/5の直径のスケールの試験用円形型振動装置を用いて(篩網、穴あき板、樹脂製タッピング部材は、実施例・比較例と同じ)、80℃の重合体含有液を、5~500kg/時間の範囲の処理速度の中で、処理速度の影響も観察するために、処理速度を変化させながら(通算平均処理速度は30kg/時間となる)48時間連続して分離回収した後の樹脂製タッピング部材の重量減少率を測定した。
樹脂製タッピング部材3個の合計量を1/3にした1個分の分離回収前の重量と、48時間後の重量から算出した。
引張強度保持率は、ASTM D-638に準拠し、樹脂製タッピング部材に用いる樹脂により測定用ダンベル片を作成し、薬液に1,000時間浸浸し、当初の引張強度と1,000時間後の引張強度とにより、引張強度保持率を算出した。
高さ減少量は、樹脂製タッピング部材の通算200時間分離回収後の高さ減少量を測定した。
液を水で10倍に希釈し、pHメータを用い室温で測定した。
(1)脱水工程:
ヨードメトリー法による分析値61.8重量%のNaSH水溶液2,000g(NaSH分として22.05モル)、及び73.7重量%のNaOH水溶液1,171g(NaOH分として21.58モル)をNMP6,001gと共に反応缶に投入した。
反応缶内を窒素ガスで置換後、約4時間かけて、撹拌しながら徐々に200℃まで昇温して、水1,014g及びNMP763gを留出させた。この際、5.5gのH2S(0.16モル)が流出(揮散)した。したがって、脱水工程後の缶内の有効S量は、21.89モルとなった。
脱水工程後、21.89モルの有効Sを含む反応缶の内容物を150℃まで冷却し、pDCB3,283g〔pDCB/有効S=1.020(モル/モル)〕、NMP2,760g〔缶内のNMP/有効S=365(g/モル)となるように添加〕、及び水189g〔缶内の合計水量/有効S=1.62(モル/モル)となるように添加〕を加え、そして、缶内NaOH/有効S=1.050(モル/モル)になるように、NaOH43.0gを加えた。反応缶内には、H2Sが揮散することにより生成したNaOH(0.32モル)が含まれている。
反応缶に備え付けた撹拌機を250rpmで撹拌しながら、220℃で5時間反応させ前段重合を行った。次に、撹拌数を400rpmに挙げ、水397gを圧入した後255℃に昇温し5時間反応させ、後段重合を行った。水/有効S(モル/モル)は2.63であった。
重合体含有液のpHは、10.3であった。
さらに、同様の手順でスケールアップをし、実施例や比較例に必要な量のPPS含有液(重合体含有液)を調整した。
PPS(株式会社クレハ製「フォートロンKPS」、温度310℃、剪断速度1200/秒での溶融粘度=480Pa・s)をヘンシェルミキサーヘ投入し、撹拌した。得られた撹拌物を、乾燥した後、温度調整された2軸押出機へ供給し、ペレットを作製した。
樹脂製タッピング部材の形状は、図2に示す円筒状であった。
ポリプロピレン(PP)のパイプから、樹脂製タッピング部材A(外径48mm、内径42mm、厚み3mm、高さ25mm)と同じ形状の、PP樹脂製タッピング部材Cを製造した。
実施例、比較例に使用した振動篩装置は、篩網直径0.9mの円形型振動篩装置であった。篩網は、100メッシュ(篩目開き150μm)のステンレス製篩網であった。穴あき板は、ステンレス製板に、直径10mmの穴を、開孔率65%で開けた。
製造例1の重合反応終了後、重合体含有液を80℃まで冷却してから、上記の円形型振動篩装置により篩分けを行った。この場合、篩網と穴あき板との間隔が、32mm、仕切の高さが、9mmで行った。
製造例1の重合反応終了後、重合体含有液を80℃まで冷却してから、上記の円形型振動篩装置により篩分けを行った。この場合、 篩網と穴あき板との間隔が、64mm、仕切の高さが、14mmで行った。樹脂製タッピング部材には、製造例2で製造した樹脂製タッピング部材B(外径48mm、内径42mm、厚み3mm、高さ47mm)を採用した。
振動により、篩網上部のポリマー(PPS)は、順次連続して排出された。
樹脂製タッピング部材を用いないで、他は実施例1と同じにした。この場合、篩分けの通算時間48時間の時の処理量が、実施例1、2に比較してかなり少なくなった。
樹脂製タッピング部材Aを、市販のエチレン・プロピレン・非共役ジエン・共重合体ゴム(EPDM)のタッピング部材(角形 縦40mm、横60mm、厚み25mm)に代え、他は実施例1と同じにした。
PPS樹脂製タッピング部材Bの代わりに、PPS樹脂製タッピング部材Aを用いた以外は、実施例2と同じに行った。この場合、樹脂製タッピング部材の高さをH、篩網と穴あき板との間隔をKとすると、(K-H)/Hは、1.56である。24時間後、25%が転倒しており、液だまりができ、篩分け能力(処理能力)が極端に落ちた。
PPS樹脂製タッピング部材Aの代わりに、汎用PP樹脂から製作したタッピング部材Cを用いた以外は、実施例1と同じように実験をした。篩分けの通算時間が、200時間を超えても、樹脂製タッピング部材の高さが、0.7mmしか減少しなかった。
PPS樹脂製タッピング部材Aの代わりに、汎用PE樹脂から製作したタッピング部材Dを用いた以外は、実施例1と同じように実験をした。篩分けの通算時間が、200時間の時点で、樹脂製タッピング部材の高さが、1mm程度しか減少しなかった。この場合、PEの削りかす状コンタミが認められた。
製造例2で使用したPPSを用いて、測定用ダンベル片を製造し、表1の薬液に1,000時間浸浸した。
結果を表1に示す。
上記タッピング部材A、C、D、PEEKからなる同一形状のタッピング部材Eを50℃の40重量%NaOH水溶液に100時間浸漬した後、実施例1と同じように実験をした。篩分けの通算時間が100時間経過した後、各タッピング部材の長期使用可能性をチェックした。A、C、Eはいずれも外観上の変化はなく、強度等に変化は認められなかった。Dについては、若干の強度低下が認められた。
上記タッピング部材A、C、D、Eを40℃のアセトンに50時間浸漬した後、実施例1と同じように実験をした。篩分けの通算時間が100時間経過した後、各タッピング部材の長期使用可能性をチェックした。A、Eはいずれも外観上の変化はなく、強度等に変化は認められなかった。Cについて若干の強度低下、Dではある程度の強度低下が認められた。
比較例1では、樹脂製タッピング部材を用いないため、篩網での篩分けが、実施例1~3の場合ほど良好なものではなく、このため長時間での処理量がかなり減少する。比較例2では、タッピング部材としてEPDMを用いているため、摩耗が激しい。またEPDMの製品へのコンタミが起こった。比較例3では、樹脂製タッピング部材の高さをH、篩網と穴あき板との間隔をKとすると、(K-H)/Hが、本発明の範囲外であるため転倒した。
2・・・基体
3・・・コイルばね
4・・・駆動源
5・・・上部非平衡重り
6・・・下部非平衡重り
7・・・篩網
8・・・樹脂製タッピング部材
9・・・穴あき板
10・・・仕切り
11・・・液回収板
12・・・重合体含有液投入口
13・・・重合体排出口
14・・・液排出口
Claims (11)
- 溶媒中での重合反応により得られた重合体を分離回収する際に用いる、篩網の目詰まり防止用の樹脂製タッピング部材であって、重合体含有液から重合体を48時間連続して分離回収した後の樹脂製タッピング部材の重量減少率が3重量%以下である樹脂製タッピング部材。
- 樹脂製タッピング部材を形成する樹脂を用いて成形した試料片を薬液に1,000時間浸漬した後の引張強度保持率が、98%以上である請求項1記載の樹脂製タッピング部材。
- 樹脂製タッピング部材が、ポリアミド、ポリイミド、ポリエーテルエーテルケトン、ポリメチルペンテン、高密度ポリエチレン、超高分子量ポリエチレン、ポリプロピレン及びポリアリーレンスルフィドからなる群より選ばれる少なくとも一つの樹脂を含んで形成される樹脂製タッピング部材である請求項1または2記載の樹脂製タッピング部材。
- 樹脂製タッピング部材が、ポリエーテルエーテルケトン、ポリメチルペンテン、ポリプロピレン及びポリアリーレンスルフィドからなる群より選ばれる少なくとも一つの樹脂を含んで形成される樹脂製タッピング部材である請求項1乃至3のいずれか1項に記載の樹脂製タッピング部材。
- 樹脂製タッピング部材の形状が、立方体状、直方体状、板状、円柱状、円筒状、ドーナツ状、円錐状、または球状である請求項1乃至4のいずれか1項に記載の樹脂製タッピング部材。
- 樹脂製タッピング部材の形状が、円筒状である請求項5記載の樹脂製タッピング部材。
- 溶媒中での重合反応により得られた重合体を分離回収する分離回収方法における、重合反応途中または重合反応後に、重合体含有液から振動篩装置を用いる篩分けによって重合体を分離回収する分離回収方法であって、該振動篩装置が、篩網の目詰まり防止用の請求項1乃至6のいずれか1項に記載の樹脂製タッピング部材を配置する振動篩装置である分離回収方法。
- 重合体が、重合体の主鎖に硫黄を含有する重合体であり、かつ、篩分け時の重合体含有液の温度が、30~230℃である請求項7記載の分離回収方法。
- 重合体が、ポリアリーレンスルフィドである請求項8記載の分離回収方法。
- 請求項7乃至9のいずれか1項に記載の分離回収方法に用いられる振動篩装置であって、樹脂製タッピング部材を篩網と篩網の下部に配設される穴あき板との間に配置し、該振動篩装置の振動により、該樹脂製タッピング部材をタッピングさせ、篩網の目詰まりを防止する振動篩装置。
- 樹脂製タッピング部材の高さをH、篩網と穴あき板との間隔をKとすると、(K-H)/Hが、0.1~1である請求項10記載の振動篩装置。
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- 2015-02-27 CN CN201580007285.4A patent/CN105960285A/zh active Pending
- 2015-02-27 KR KR1020167021607A patent/KR20160106695A/ko not_active Application Discontinuation
- 2015-02-27 US US15/121,955 patent/US20170066884A1/en not_active Abandoned
- 2015-02-27 JP JP2016505329A patent/JPWO2015129868A1/ja active Pending
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2018
- 2018-03-22 US US15/928,271 patent/US20180244849A1/en not_active Abandoned
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CN110604961A (zh) * | 2019-09-16 | 2019-12-24 | 北京泽阳天成化工技术有限公司 | 聚丙烯生产工艺中聚合物的分离方法及分离装置 |
Also Published As
Publication number | Publication date |
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CN105960285A (zh) | 2016-09-21 |
US20180244849A1 (en) | 2018-08-30 |
KR20160106695A (ko) | 2016-09-12 |
JPWO2015129868A1 (ja) | 2017-03-30 |
US20170066884A1 (en) | 2017-03-09 |
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