WO2017170584A1 - 金属含有粒子の分散液の製造方法および水素化共役ジエン系重合体の製造方法 - Google Patents
金属含有粒子の分散液の製造方法および水素化共役ジエン系重合体の製造方法 Download PDFInfo
- Publication number
- WO2017170584A1 WO2017170584A1 PCT/JP2017/012715 JP2017012715W WO2017170584A1 WO 2017170584 A1 WO2017170584 A1 WO 2017170584A1 JP 2017012715 W JP2017012715 W JP 2017012715W WO 2017170584 A1 WO2017170584 A1 WO 2017170584A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal
- polymer
- palladium
- dispersion
- conjugated diene
- Prior art date
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- 239000002184 metal Substances 0.000 title claims abstract description 166
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- 238000000034 method Methods 0.000 title claims abstract description 22
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- 239000003638 chemical reducing agent Substances 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
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- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- NKKMVIVFRUYPLQ-NSCUHMNNSA-N crotononitrile Chemical compound C\C=C\C#N NKKMVIVFRUYPLQ-NSCUHMNNSA-N 0.000 description 1
- 125000002897 diene group Chemical group 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- IYDMNMSJMUMQBP-UHFFFAOYSA-N dipotassium;palladium(2+);tetracyanide Chemical compound [K+].[K+].[Pd+2].N#[C-].N#[C-].N#[C-].N#[C-] IYDMNMSJMUMQBP-UHFFFAOYSA-N 0.000 description 1
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- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
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- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 150000004687 hexahydrates Chemical class 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
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- 238000005470 impregnation Methods 0.000 description 1
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- 238000002347 injection Methods 0.000 description 1
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- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002500 ions Chemical group 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
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- 229920005615 natural polymer Polymers 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- MUMZUERVLWJKNR-UHFFFAOYSA-N oxoplatinum Chemical compound [Pt]=O MUMZUERVLWJKNR-UHFFFAOYSA-N 0.000 description 1
- BHZSLLSDZFAPFH-UHFFFAOYSA-L palladium(2+);difluoride Chemical compound F[Pd]F BHZSLLSDZFAPFH-UHFFFAOYSA-L 0.000 description 1
- NXJCBFBQEVOTOW-UHFFFAOYSA-L palladium(2+);dihydroxide Chemical compound O[Pd]O NXJCBFBQEVOTOW-UHFFFAOYSA-L 0.000 description 1
- INIOZDBICVTGEO-UHFFFAOYSA-L palladium(ii) bromide Chemical compound Br[Pd]Br INIOZDBICVTGEO-UHFFFAOYSA-L 0.000 description 1
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 1
- OZVHAYAOFBRGQV-UHFFFAOYSA-K pentanoate;rhodium(3+) Chemical compound [Rh+3].CCCCC([O-])=O.CCCCC([O-])=O.CCCCC([O-])=O OZVHAYAOFBRGQV-UHFFFAOYSA-K 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- PMJHHCWVYXUKFD-UHFFFAOYSA-N piperylene Natural products CC=CC=C PMJHHCWVYXUKFD-UHFFFAOYSA-N 0.000 description 1
- 229910003446 platinum oxide Inorganic materials 0.000 description 1
- 229920002587 poly(1,3-butadiene) polymer Polymers 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229940096992 potassium oleate Drugs 0.000 description 1
- 229920005614 potassium polyacrylate Polymers 0.000 description 1
- MLICVSDCCDDWMD-KVVVOXFISA-M potassium;(z)-octadec-9-enoate Chemical compound [K+].CCCCCCCC\C=C/CCCCCCCC([O-])=O MLICVSDCCDDWMD-KVVVOXFISA-M 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000007870 radical polymerization initiator Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 150000003284 rhodium compounds Chemical class 0.000 description 1
- SVOOVMQUISJERI-UHFFFAOYSA-K rhodium(3+);triacetate Chemical compound [Rh+3].CC([O-])=O.CC([O-])=O.CC([O-])=O SVOOVMQUISJERI-UHFFFAOYSA-K 0.000 description 1
- MMRXYMKDBFSWJR-UHFFFAOYSA-K rhodium(3+);tribromide Chemical compound [Br-].[Br-].[Br-].[Rh+3] MMRXYMKDBFSWJR-UHFFFAOYSA-K 0.000 description 1
- QRRFFHBDASQYFJ-UHFFFAOYSA-K rhodium(3+);triformate Chemical compound [Rh+3].[O-]C=O.[O-]C=O.[O-]C=O QRRFFHBDASQYFJ-UHFFFAOYSA-K 0.000 description 1
- KXAHUXSHRWNTOD-UHFFFAOYSA-K rhodium(3+);triiodide Chemical compound [Rh+3].[I-].[I-].[I-] KXAHUXSHRWNTOD-UHFFFAOYSA-K 0.000 description 1
- VXNYVYJABGOSBX-UHFFFAOYSA-N rhodium(3+);trinitrate Chemical compound [Rh+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VXNYVYJABGOSBX-UHFFFAOYSA-N 0.000 description 1
- YWFDDXXMOPZFFM-UHFFFAOYSA-H rhodium(3+);trisulfate Chemical compound [Rh+3].[Rh+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O YWFDDXXMOPZFFM-UHFFFAOYSA-H 0.000 description 1
- SONJTKJMTWTJCT-UHFFFAOYSA-K rhodium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Rh+3] SONJTKJMTWTJCT-UHFFFAOYSA-K 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Images
Classifications
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/44—Palladium
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/42—Platinum
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
- B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0201—Impregnation
- B01J37/0211—Impregnation using a colloidal suspension
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
- B01J37/0219—Coating the coating containing organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
- B01J37/0225—Coating of metal substrates
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- B01J37/16—Reducing
- B01J37/18—Reducing with gases containing free hydrogen
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- 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
- C08F36/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F36/02—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F36/04—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
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- 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
- C08F8/00—Chemical modification by after-treatment
- C08F8/04—Reduction, e.g. hydrogenation
Definitions
- the present invention relates to a method for producing a dispersion of metal-containing particles having excellent catalytic activity as a hydrogenation reaction catalyst, and a hydrogenated conjugated diene polymer using such a dispersion of metal-containing particles. It relates to a manufacturing method.
- a method for selectively or partially hydrogenating carbon-carbon double bonds of a conjugated diene polymer is known as a useful means for modifying a conjugated diene polymer.
- Hydrogenated conjugated diene polymers such as hydrogenated acrylonitrile-butadiene copolymers are produced on an industrial scale.
- Such a hydrogenated conjugated diene polymer is usually obtained by using a metal-containing catalyst such as a platinum group element against a conjugated diene polymer obtained by polymerization of a monomer containing a conjugated diene in a solvent. , Produced by hydrogenation.
- a metal-containing catalyst such as a platinum group element against a conjugated diene polymer obtained by polymerization of a monomer containing a conjugated diene in a solvent.
- Examples of the metal-containing catalyst used in the above process include a metal element and a compound of a metal element, and such a metal element and a compound of a metal element are supported on a carrier, for example, It is used as a metal supported catalyst (for example, refer to Patent Document 1).
- the present invention has been made in view of such circumstances, a method for producing a dispersion of metal-containing particles that is excellent in catalytic activity as a hydrogenation reaction catalyst and can realize a high hydrogenation rate, and An object of the present invention is to provide a method for producing a hydrogenated conjugated diene polymer using such a dispersion of metal-containing particles.
- the inventors of the present invention have made extensive studies to solve the above-mentioned problems.
- the metal and / or the metal compound is applied to a metal support in which a metal and / or a metal compound is supported on a support in a solvent.
- a dispersion of metal-containing particles in which the metal and / or metal compound is dispersed in a solvent in the form of particles can be obtained. It has been found that a dispersion of such metal-containing particles is excellent in catalytic activity as a hydrogenation reaction catalyst and can realize a high hydrogenation rate, and the present invention has been completed.
- a polymer protective agent having an affinity for the metal and / or the metal compound with respect to a metal carrier obtained by supporting a metal and / or metal compound on a carrier in a solvent.
- a method for producing a dispersion liquid of metal-containing particles which is obtained by contacting to obtain a dispersion liquid of metal-containing particles in which the metal and / or the metal compound are dispersed in a solvent in the form of particles.
- the metal carrier is obtained by supporting a platinum group element and / or a platinum group element-containing compound on a carrier as the metal and / or the metal compound.
- the polymer protective agent is preferably a vinyl compound polymer having a polar group in a side chain.
- the polymer protective agent is preferably polyvinylpyrrolidone.
- the ratio of the metal carrier to the polymer protective agent is preferably a weight ratio of “polymer protective agent / total of metal and metal compound in metal carrier”, preferably 0.1 to 1,000 is preferred.
- a method for producing a hydrogenated conjugated diene polymer in which a conjugated diene polymer is hydrogenated in a solvent in the presence of a dispersion of metal-containing particles obtained by the above production method. Provided.
- the present invention it is possible to provide a dispersion of metal-containing particles that is excellent in catalytic activity as a hydrogenation reaction catalyst and can realize a high hydrogenation rate. Moreover, according to this invention, the manufacturing method of the hydrogenated conjugated diene type polymer using the dispersion liquid of such a metal containing particle
- FIG. 1A is a transmission micrograph (TEM image) of the metal carrier obtained in Production Example 1.
- FIG. 1B is a dispersion of metal-containing particles obtained in Example 1 (FIG. 1B). It is a transmission-type photomicrograph (TEM image) of a nano colloid solution.
- the method for producing a dispersion of metal-containing particles according to the present invention comprises a metal carrier and a metal carrier on which a metal and / or metal compound is supported in a solvent.
- a dispersion liquid of metal-containing particles is obtained in which the metal and / or the metal compound is dispersed in a solvent in the form of particles. It is characterized by that.
- the metal carrier used in the production method of the present invention is a metal carrier and / or metal compound supported on a carrier.
- the metal and / or metal compound constituting the metal carrier may be a metal or metal compound used as a catalyst for hydrogenation reactions such as carbon-carbon unsaturated bonds contained in various compounds, including conjugated diene polymers.
- a platinum group element and / or a platinum group element-containing compound that is, ruthenium, rhodium, palladium, osmium, iridium or platinum, or a compound containing these is preferably used from the viewpoint of catalytic activity. .
- palladium, rhodium, or a compound thereof is preferable, and palladium or a palladium compound is more preferable.
- Two or more platinum group elements and platinum group element-containing compounds may be used in combination, but in that case, it is preferable to use palladium or a palladium compound as a main catalyst component.
- a II-valent or IV-valent palladium compound is usually used, and the form thereof is a salt or a complex salt.
- the palladium compound examples include palladium acetate, palladium cyanide, palladium fluoride, palladium chloride, palladium bromide, palladium iodide, palladium nitrate, palladium sulfate, palladium oxide, palladium hydroxide, dichloro (cyclooctadiene) palladium, Examples include dichloro (norbornadiene) palladium, dichlorobis (triphenylphosphine) palladium, sodium tetrachloropalladate, ammonium hexachloropalladate, and potassium tetracyanopalladate.
- palladium acetate, palladium nitrate, palladium sulfate, palladium chloride, sodium tetrachloropalladate, and ammonium hexachloropalladate are preferable, and palladium acetate, palladium nitrate, and palladium chloride are more preferable.
- rhodium compounds include rhodium chloride, rhodium bromide, rhodium iodide, rhodium nitrate, rhodium sulfate, rhodium acetate, rhodium formate, rhodium propionate, rhodium butyrate, rhodium valerate, rhodium naphthenate, rhodium acetylacetonate, oxidation Examples thereof include rhodium and rhodium trihydroxide.
- the carrier for forming the metal carrier may be any carrier that is generally used as a carrier for a metal catalyst, and specifically, activated carbon generally used as an adsorbent; silicon, Inorganic compounds containing aluminum, magnesium and the like are preferred.
- Such a support is preferably appropriately selected from known catalyst supports such as carbon such as activated carbon, activated clay, talc, clay, alumina gel, silica, diatomaceous earth, and synthetic zeolite.
- catalyst supports such as carbon such as activated carbon, activated clay, talc, clay, alumina gel, silica, diatomaceous earth, and synthetic zeolite.
- Examples of the method for supporting a metal or metal compound as a catalyst component on the surface include an impregnation method, a coating method, a spraying method, and a precipitation method.
- the amount of the metal or metal compound supported is preferably 0.1 to 20% by weight, more preferably 0.1 to 20% by weight, based on the total amount of the metal or metal compound as a catalyst component and the support. It is 10% by weight, more preferably 0.1 to 5% by weight.
- the polymer protective agent used in the production method of the present invention is a polymer material having affinity for the metal and / or metal compound supported on the metal carrier, and the metal and / or the metal supported on the metal carrier. By interacting with the metal compound, such a metal and / or metal compound is dispersed in a solvent in the form of particles while protecting these particles.
- Such a polymer protective agent is not particularly limited, but a polymer having a polar group is preferable from the viewpoint of affinity for the metal and / or metal compound supported on the metal carrier, and among them, an alkoxyl group,
- a polymer having at least one polar group selected from the group consisting of a carbonyl group, a hydroxyl group, a carboxyl group, an ether group, an amino group, and a cyano group is more preferable, and includes an alkoxyl group, a carbonyl group, an ether group, and a cyano group.
- polymer having at least one polar group selected from the group consisting of Specific examples of such polymer protective agents include polymers of vinyl compounds having a polar group in the side chain such as polyvinyl pyrrolidone, polyvinyl alcohol, polyvinyl acetal, and polymethyl vinyl ether; sodium polyacrylate, potassium polyacrylate Metal salts of polyacrylic acid such as; polyethers such as polyethylene glycol, polypropylene oxide, ethylene oxide-propylene oxide copolymer; cellulose derivatives such as carboxymethyl cellulose and hydroxypropyl cellulose; natural polymers such as gelatin and albumin; polyethyleneimine And nitrogen atom-containing polymers such as acrylonitrile-butadiene copolymer.
- polymers of vinyl compounds having a polar group in the side chain such as polyvinyl pyrrolidone, polyvinyl alcohol, polyvinyl acetal, and polymethyl vinyl ether
- sodium polyacrylate, potassium polyacrylate Metal salts of polyacrylic acid such as
- polyvinyl pyrrolidone polymethyl vinyl ether, and polyethylene glycol are preferable, and polyvinyl pyrrolidone is more preferable from the viewpoint of affinity for the metal and / or metal compound supported on the metal carrier.
- the dispersion of metal compound particles obtained by the production method of the present invention is used as a hydrogenation catalyst for an acrylonitrile-butadiene copolymer as an example of a conjugated diene polymer
- the target of the hydrogenation reaction From the viewpoint that the interaction with the resulting polymer can be further increased, it is also preferable to use an acrylonitrile-butadiene copolymer as the polymer protective agent.
- a polymeric protective agent may be used individually by 1 type, or may be used in combination of 2 or more type.
- the weight average molecular weight of the polymer protective agent used in the production method of the present invention is preferably 500 to 1,000,000, more preferably 1,000 to 500,000.
- the weight average molecular weight of the polymer protective agent can be determined as a value in terms of polystyrene using, for example, gel permeation chromatography (GPC).
- the polymer protective agent is brought into contact with the metal carrier in the solvent.
- the solvent used in this case is not particularly limited, but the polymer protective agent is used.
- a soluble solvent is preferable, and the solubility parameter is 6.6 to 24.0 (cal) from the viewpoint that the affinity with the polymer protective agent is good and thereby the dispersibility of the metal-containing particles can be further improved.
- / Cm 3 ) 1/2 are more preferable, and those having a solubility parameter in the range of 7.0 to 23.5 (cal / cm 3 ) 1/2 are particularly preferable.
- solvents examples include water, methanol, ethanol, isopropyl alcohol, acetone, methyl ethyl ketone, diethyl ketone, methyl isopropyl ketone, 2-pentanone, 3-pentanone, cyclopentanone, cyclohexanone, diethyl ether, tetrahydrofuran, Examples include dioxane and anisole.
- the solvent when selecting a solvent, may be selected from the viewpoint of the affinity for the solvent used when the conjugated diene polymer is hydrogenated. For example, it is used for the hydrogenation reaction.
- a solvent having a high affinity for the solvent or the same solvent as that used in the hydrogenation reaction.
- the solvent used for the hydrogenation reaction is water (that is, when it is an aqueous dispersion of a conjugated diene polymer), it is used for bringing the polymer protective agent into contact with the metal carrier.
- a solvent having high affinity for water such as water, methanol, ethanol, isopropyl alcohol, and acetone can be selected.
- the solvent used for the hydrogenation reaction is an organic solvent such as methanol, ethanol, isopropyl alcohol, or acetone
- the solvent used for contacting the polymer support with the metal carrier is The same solvent as these may be selected.
- the metal and / or metal compound contained in the metal carrier is in the form of particles in the solvent by bringing the polymer protective agent into contact with the metal carrier described above in the solvent.
- the method of bringing the polymer protective agent into contact with the metal carrier in the solvent is not particularly limited, and examples thereof include a method of stirring the metal carrier and the polymer protective agent in the solvent. It is done.
- the amount of the metal carrier and the polymer protective agent used is “polymer protective agent / metal and metal compound in metal carrier”.
- the total weight ratio is preferably 0.1 to 1,000, more preferably 0.2 to 900, and still more preferably 0.5 to 800.
- the atmosphere when the polymer protective agent is brought into contact with the metal carrier is not particularly limited, but the metal and / or metal compound supported on the surface of the metal carrier is more dispersed in the solvent. From the viewpoint that it can be made to be a reducing atmosphere such as a hydrogen gas atmosphere.
- the hydrogen pressure gauge pressure
- the hydrogen pressure is preferably 0 to 5 MPa, more preferably 0.01 to 3 MPa, and still more preferably 0.1 to 2 MPa.
- a method of adding a reducing agent such as sodium borohydride (NaBH 4 ) into the system may be employed.
- the stirring speed in the case of employing the method of stirring the metal carrier and the polymer protective agent is not particularly limited, but is preferably 1 to 100 rpm, more preferably 5 to 40 rpm, and the stirring time is Preferably it is 5 to 600 minutes, more preferably 10 to 120 minutes.
- the stirring temperature is preferably 0 to 80 ° C., more preferably 5 to 50 ° C.
- the metal and / or metal compound contained in the metal carrier is in the form of particles by contacting the polymer carrier with the metal carrier in the solvent.
- a dispersion liquid of metal-containing particles dispersed therein can be obtained.
- the dispersion of the metal-containing particles obtained in this way is a state in which the metal and / or metal compound contained in the metal carrier is in the form of particles and protected by the polymer protective agent (mutually with the polymer protective agent).
- the metal-containing particles contained in the dispersion liquid are usually dispersed as nano-order sized particles (specifically, several nanometers to several tens of nanometers).
- Such metal-containing particles may be in the form of a metal and / or metal compound contained in a metal carrier and dispersed in an ionized state.
- a metal carrier formed by supporting a metal and / or metal compound on a carrier is used as a raw material.
- the metal and / or metal compound is usually , Supported in nano-order size particles. And, according to the production method of the present invention, by bringing the polymer protective agent into contact with such a metal carrier, the state of the nano-order size particles is appropriately maintained by the action of the polymer protective agent.
- the metal and / or metal compound can be dispersed in a solvent, whereby high catalytic activity can be realized.
- the method for producing the hydrogenated conjugated diene polymer of the present invention is carried out in the presence of a dispersion of metal-containing particles obtained by the above-described production method in a solvent. A step of hydrogenating the coalescence.
- hydrogenation is a reaction in which at least a part of the carbon-carbon double bond contained in the conjugated diene polymer is hydrogenated and converted to a saturated bond.
- the conjugated diene polymer used in the present invention is a conjugated diene monomer alone or in combination with a conjugated diene monomer and a monomer copolymerizable with the conjugated diene monomer. Alternatively, it is a polymer produced by a solution polymerization method, preferably an emulsion polymerization method.
- the conjugated diene monomer for forming the conjugated diene polymer is not particularly limited as long as it is a polymerizable monomer having a conjugated diene structure.
- 1,3-butadiene, 2-methyl-1 , 3-butadiene (isoprene), 2,3-dimethyl-1,3-butadiene, 2-chloro-1,3-butadiene, 1,3-pentadiene and the like are preferable, and 1,3-butadiene is more preferable.
- Examples of the monomer copolymerizable with the conjugated diene monomer include ⁇ , ⁇ -ethylenically unsaturated nitrile monomers such as acrylonitrile, methacrylonitrile, and crotonnitrile; acrylic acid, methacrylic acid, crotonic acid, ⁇ , ⁇ -ethylenically unsaturated carboxylic acids such as fumaric acid, maleic acid and itaconic acid; ⁇ , ⁇ -ethylenically unsaturated acids such as methyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate, trifluoroethyl acrylate and methyl methacrylate Saturated carboxylic acid esters; ⁇ , ⁇ -ethylene unsaturated carboxylic acid amides such as acrylamide and methacrylamide; vinyl aromatic compounds such as styrene, ⁇ -methylstyrene, p-methylstyrene, diviny
- conjugated diene polymer used in the present invention examples include a butadiene polymer, an isoprene polymer, a butadiene-styrene copolymer, an acrylonitrile-butadiene copolymer, an acrylonitrile-isoprene copolymer, and an acrylonitrile-butadiene-isoprene copolymer.
- Polymer methacrylonitrile-butadiene copolymer, methacrylonitrile-isoprene copolymer, methacrylonitrile-butadiene-isoprene copolymer, acrylonitrile-methacrylonitrile-butadiene copolymer, acrylonitrile-butadiene-methyl acrylate copolymer, Examples include acrylonitrile-butadiene-acrylic acid copolymer and acrylonitrile-butadiene-acrylic acid ester copolymer.
- conjugated diene polymers from the viewpoint of practicality and versatility as a raw material for producing hydrogenated conjugated diene polymers, acrylonitrile-butadiene copolymer, methacrylonitrile-butadiene copolymer, acrylonitrile-butadiene- Acrylic ester copolymers are preferred, and acrylonitrile-butadiene copolymers are more preferred.
- the composition ratio of the monomer units constituting the conjugated diene polymer is not particularly limited, but is 5 to 100% by weight of the conjugated diene monomer unit, and 95 to 0% by weight of the monomer unit copolymerizable therewith. It is preferably 10 to 90% by weight of the conjugated diene monomer unit, and more preferably 90 to 10% by weight of the monomer unit copolymerizable therewith.
- the weight average molecular weight (gel permeation chromatography method, standard polystyrene conversion) of the conjugated diene polymer is not particularly limited, but is usually 5,000 to 500,000.
- the emulsion polymerization method as a suitable method for preparing a conjugated diene polymer is generally a polymerization in an aqueous medium using a radical polymerization initiator.
- a polymerization initiator or a molecular weight modifier is used. May be a known one.
- the polymerization reaction may be any of batch, semi-batch and continuous, and the polymerization temperature and pressure are not particularly limited.
- the emulsifier to be used is not particularly limited, and an anionic surfactant, a cationic surfactant, an amphoteric surfactant, a nonionic surfactant, and the like can be used, and an anionic surfactant is preferable. These emulsifiers may be used alone or in combination of two or more. The amount used is not particularly limited.
- the solid content concentration of the conjugated diene polymer latex obtained by emulsion polymerization is not particularly limited, but is usually 2 to 70% by weight, preferably 5 to 60% by weight.
- the solid content concentration can be appropriately adjusted by a known method such as a blending method, a dilution method, or a concentration method.
- the hydrogenation reaction of the conjugated diene polymer may be performed in the latex state with respect to the latex obtained by emulsion polymerization, or the conjugated diene system obtained by coagulating and drying the latex obtained by emulsion polymerization.
- the polymer may be dissolved in a suitable organic solvent and carried out in the state of a polymer solution.
- the latex can be coagulated and dried by a known method, but by providing a treatment step for bringing crumb obtained by coagulation into contact with a basic aqueous solution, the resulting conjugated diene polymer is converted to tetrahydrofuran (THF). It is preferable to modify so that the pH of the polymer solution measured by dissolution exceeds 7.
- the pH of the polymer solution measured by dissolving in THF is preferably in the range of 7.2 to 12, more preferably 7.5 to 11.5, and most preferably 8 to 11.
- the solution concentration of the conjugated diene polymer in the polymer solution is preferably 1 to 70% by weight, more preferably 2 to 40% by weight.
- the organic solvent include aliphatic hydrocarbons such as n-hexane, cyclohexane and n-heptane; aromatic hydrocarbons such as benzene, toluene, xylene and chlorobencene; acetone, methyl ethyl ketone, diethyl ketone, methyl isopropyl ketone, 2 -Ketones such as pentanone, 3-pentanone, cyclopentanone and cyclohexanone; ethers such as diethyl ether, tetrahydrofuran, dioxane and anisole; esters such as ethyl acetate; Among these organic solvents, ketones are preferably used, and acetone is particularly preferably used.
- the polymer latex and the metal-containing particle dispersion obtained by the above-described production method are mixed and stirred in a hydrogen gas atmosphere, so that the hydrogenation reaction
- the hydrogenation reaction is performed in the state of a polymer solution
- the polymer solution is mixed with a dispersion of metal-containing particles obtained by the above-described production method, and the reaction is performed in a hydrogen gas atmosphere. What is necessary is just to perform a hydrogenation reaction by stirring.
- the temperature of the hydrogenation reaction is usually 0 to 200 ° C., preferably 5 to 150 ° C., more preferably 10 to 100 ° C. By setting the temperature of the hydrogenation reaction within the above range, the reaction rate can be sufficient while suppressing side reactions.
- the hydrogen pressure during the hydrogenation reaction is usually 0.1 to 20 MPa, preferably 0.1 to 15 MPa, more preferably 0.1 to 10 MPa in terms of gauge pressure.
- the reaction time is not particularly limited, but is usually 30 minutes to 50 hours.
- the hydrogen gas is preferably pressurized after first substituting the reaction system with an inert gas such as nitrogen and further substituting with hydrogen.
- the amount of the metal-containing particle dispersion used is 100% by weight of the conjugated diene polymer used for hydrogenation, and the metal-containing particle dispersion contains the metal-containing particle dispersion.
- the amount of metal (that is, the amount of metal in the metal particles and metal compound particles derived from the metal carrier) is preferably 10 to 3,000 ppm by weight, preferably 50 to 2,000 ppm by weight. It is more preferable to set it as an amount.
- the dispersion of metal-containing particles obtained by the production method of the present invention is excellent in catalytic activity as a hydrogenation reaction catalyst, and can achieve a high hydrogenation reaction rate even with a small amount of use. From such a viewpoint, the amount of the metal-containing particle dispersion used is preferably within the above range.
- the dispersion of metal-containing particles obtained by the production method of the present invention can achieve high catalytic activity when used as a hydrogenation catalyst for a conjugated diene polymer as described above.
- High catalytic activity can also be realized in hydrogenation reactions such as carbon-carbon unsaturated bonds contained in.
- olefins such as butene, pentene, hexene, methylcyclohexene, dimethylcyclohexene; acetylene; aldehydes and ketones such as benzaldehyde, cyclopentanone, isobutylmethylketone, cyclohexanone, cyclopentanone; benzonitrile,
- nitriles such as aminonitrile.
- Hydrogenation rate (a) The hydrogenation rate (a) was determined by measuring the iodine value of the acrylonitrile-butadiene copolymer before the hydrogenation and the iodine value of the acrylonitrile-butadiene copolymer after the hydrogenation, and determining the ratio. The iodine value was measured according to JIS K6235. Hydrogenation rate (b) The hydrogenation rate (b) was determined from the ratio obtained by measuring the amounts of 1,2-dimethyl-1-cyclohexene and 1,2-dimethyl-1-cyclohexane using gas chromatography.
- a gas chromatograph with an FID detector (manufactured by Agilent Technologies) is used as a capillary column with HP-1 (60 m ⁇ 250 ⁇ m ⁇ 1.0 ⁇ m), sample injection amount: 1.0 ⁇ L, split ratio: 1 / 50, inlet temperature: 140 ° C., detector temperature: 300 ° C., carrier gas: helium, carrier gas flow rate: 1.0 ml / min, heating is started under the conditions of oven temperature: 40 ° C., 40 ° C. For 10 minutes, and then heated up to 250 ° C. at a rate of 10 ° C./min, and further up to 280 ° C. at a rate of 20 ° C./min. And the ratio was calculated
- FIG. 1A shows a transmission micrograph (TEM image) of the metal carrier PdO / SiO 2 obtained in Production Example 1.
- FIG. 1A shows a transmission micrograph (TEM image) of the metal carrier PdO / SiO 2 obtained in Production Example 1.
- Production Example 2 The metal support PdO / SiO 2 obtained in Production Example 1 is reduced under a hydrogen atmosphere at 300 ° C. for 1 hour to reduce the palladium oxide supported on silica. Thus, a metal carrier Pd / SiO 2 in which palladium was supported on silica was obtained. The amount of palladium supported in the obtained metal support Pd / SiO 2 was 2% by weight.
- Production Example 3 A metal carrier PdO / Al 2 O 3 in which a palladium oxide was supported on alumina was obtained in the same manner as in Production Example 1 except that 98 g of alumina was used instead of 98 g of silica. The obtained metal carrier PdO / Al 2 O 3 is subjected to a reduction treatment in the same manner as in Production Example 2 to obtain a metal carrier Pd / Al 2 O 3 in which palladium is supported on alumina. It was. The amount of palladium supported in the obtained metal support Pd / SiO 2 was 2% by weight.
- Production Example 5 A reactor was charged with 2 parts of potassium oleate, 180 parts of ion exchanged water, 37 parts of acrylonitrile, and 0.5 part of t-dodecyl mercaptan in this order. Next, after replacing the inside of the reactor with nitrogen, 63 parts of butadiene was added, the reactor was cooled to 10 ° C., and 0.01 parts of cumene hydroperoxide and 0.01 parts of ferrous sulfate were added. . The contents were then stirred for 16 hours while maintaining the reactor at 10 ° C.
- Example 1 In a 100 ml stainless steel pressure vessel, 0.2 g of the metal carrier PdO / SiO 2 obtained in Production Example 1 and 2 g of a 30 wt% aqueous solution of polyvinylpyrrolidone (PVP, weight average molecular weight in terms of polystyrene: 10,000). Then, water was added so that the total amount of the solution was 20 g. The palladium concentration in the solution at this time was 0.020% by weight, and the weight ratio of “polyvinylpyrrolidone / palladium” was 150.
- PVP polyvinylpyrrolidone
- FIG. 1B shows a transmission micrograph (TEM image) of the nanocolloid solution (a1) obtained in Example 1.
- This transmission micrograph (TEM image) was measured in a condensed state of the nanocolloid solution (a1) obtained in Example 1, and the photograph shown in FIG. It is measured at the same magnification as the photograph shown in A).
- FIG. 1A and FIG. 1B the palladium oxide particles supported on the surface of the metal support obtained in Production Example 1
- the palladium oxide particles in the obtained nanocolloid solution (a1) have almost the same size.
- the nanocolloid solution (a1) obtained in Example 1 was produced. It can be said that the palladium oxide particles supported on the surface of the metal carrier obtained in Example 1 were uniformly dispersed while maintaining the particle diameter (the same applies to Examples 2 to 7 described later). ). That is, it can be said that the nanocolloid solution (a1) is obtained by uniformly dispersing nano-order palladium oxide (PdO) particles in water.
- the resulting hydrogenated acrylonitrile-butadiene copolymer (b1) was concentrated under reduced pressure using a rotary evaporator to obtain a solid hydrogenated acrylonitrile-butadiene copolymer (b1).
- the hydrogenation rate of the obtained hydrogenated acrylonitrile-butadiene copolymer (b1) was measured according to the above method. The hydrogenation rate was 93%.
- Example 2 The amount of 30% by weight aqueous solution of polyvinylpyrrolidone (PVP) is changed from 2 g to 8 g (ie, the weight ratio of “polyvinylpyrrolidone / palladium” is 600), and the pressurized stainless steel pressure vessel is rotated and stirred. A nano colloid in which nano-order palladium oxide (PdO) particles are uniformly dispersed in water in the same manner as in Example 1 except that the temperature of the thermostatic chamber is changed from 20 ° C. to 50 ° C. A solution (a2) was obtained. The palladium concentration in the obtained nanocolloid solution (a2) was 0.019% by weight.
- PVP polyvinylpyrrolidone
- the latex of the acrylonitrile-butadiene copolymer obtained in Production Example 5 was hydrogenated in the same manner as in Example 1 except that the nanocolloid solution (a2) obtained above was used.
- a hydrogenated acrylonitrile-butadiene copolymer (b2) was obtained.
- the hydrogenation rate of the obtained hydrogenated acrylonitrile-butadiene copolymer (b2) was 95%.
- Example 3 In place of 0.2 g of the metal carrier PdO / SiO 2 obtained in Production Example 1, 0.2 g of the metal carrier Pd / SiO 2 obtained in Production Example 2 was used, and hydrogen was added into the stainless steel pressure vessel.
- a nano colloid solution (a3) was obtained in the same manner as in Example 1 except that nano-order palladium particles were uniformly dispersed in water. The palladium concentration in the obtained nanocolloid solution (a3) was 0.004% by weight.
- a latex reaction of the acrylonitrile-butadiene copolymer latex obtained in Production Example 5 was performed in the same manner as in Example 1 except that the nanocolloid solution (a3) obtained above was used.
- a hydrogenated acrylonitrile-butadiene copolymer (b3) was obtained. The hydrogenation rate of the obtained hydrogenated acrylonitrile-butadiene copolymer (b3) was 90%.
- Example 4 In place of 0.2 g of the metal carrier PdO / SiO 2 obtained in Production Example 1, 0.2 g of the metal carrier Pd / Al 2 O 3 obtained in Production Example 3 was used, and polyvinylpyrrolidone (PVP) The nano-order palladium particles are uniformly dispersed in water in the same manner as in Example 1 except that 2 g of 30% by weight aqueous solution of polymethyl vinyl ether (PMVE) is used instead of 2 g of 30% by weight aqueous solution of A nanocolloid solution (a4) was obtained. The palladium concentration in the obtained nanocolloid solution (a4) was 0.012% by weight.
- PMVE polymethyl vinyl ether
- the latex of the acrylonitrile-butadiene copolymer obtained in Production Example 5 was hydrogenated in the same manner as in Example 1 except that the nanocolloid solution (a4) obtained above was used.
- a hydrogenated acrylonitrile-butadiene copolymer (b4) was obtained.
- the hydrogenation rate of the obtained hydrogenated acrylonitrile-butadiene copolymer (b4) was 88%.
- Example 5 Instead of 2 g of 30% by weight aqueous solution of polyvinylpyrrolidone (PVP), 2 g of 30% by weight aqueous solution of polyethylene glycol (PEG) was used, and methanol was used instead of water as the solvent, as in Example 1. Thus, a nanocolloid solution (a5) in which nano-order palladium particles were uniformly dispersed in methanol was obtained. The palladium concentration in the obtained nanocolloid solution (a5) was 0.014% by weight. Then, the latex of the acrylonitrile-butadiene copolymer obtained in Production Example 5 was hydrogenated in the same manner as in Example 1 except that the nanocolloid solution (a5) obtained above was used. A hydrogenated acrylonitrile-butadiene copolymer (b5) was obtained. The resulting hydrogenated acrylonitrile-butadiene copolymer (b5) had a hydrogenation rate of 85%.
- PVP polyvinylpyrrolidone
- PEG polyethylene glyco
- Example 6 Nano-order palladium oxide (PdO) particles are uniform in water in the same manner as in Example 1 except that sodium borohydride (NaBH 4 ) is added instead of filling the stainless steel pressure vessel with hydrogen. A nano colloidal solution (a6) was obtained, which was dispersed in the solution. The palladium concentration in the obtained nanocolloid solution (a6) was 0.014% by weight. Then, the latex of the acrylonitrile-butadiene copolymer obtained in Production Example 5 was hydrogenated in the same manner as in Example 1 except that the nanocolloid solution (a6) obtained above was used. A hydrogenated acrylonitrile-butadiene copolymer (b6) was obtained. The hydrogenation rate of the obtained hydrogenated acrylonitrile-butadiene copolymer (b6) was 85%.
- NaBH 4 sodium borohydride
- Example 7 Instead of 0.2 g of the metal carrier PdO / SiO 2 obtained in Production Example 1, 0.2 g of the metal carrier Pt / C obtained in Production Example 4 was used, and 30 weight of polyvinylpyrrolidone (PVP) was used.
- the nano-order platinum particles are uniform in water in the same manner as in Example 1 except that the amount of the aqueous solution used is changed from 2 g to 0.133 g (ie, the weight ratio of “polyvinylpyrrolidone / platinum” is 10).
- a nanocolloid solution (a7) was obtained, which was dispersed in the solution.
- the platinum concentration in the obtained nanocolloid solution (a7) was 0.008% by weight.
- PVP polyvinylpyrrolidone
- the obtained colloidal solution (a8) was observed with a transmission microscope (TEM), the presence of palladium particles in the colloidal solution (a8) was confirmed, but it was present as coarse particles. In addition, the palladium particles were non-uniformly present in the colloidal solution (a8). Then, the latex of the acrylonitrile-butadiene copolymer obtained in Production Example 5 was hydrogenated in the same manner as in Example 1 except that the nanocolloid solution (a8) obtained above was used. A hydrogenated acrylonitrile-butadiene copolymer (b8) was obtained. The hydrogenation rate of the obtained hydrogenated acrylonitrile-butadiene copolymer (b8) was 40%.
- Table 1 summarizes the results of Examples 1 to 7 and Comparative Example 1.
- a metal-containing particle dispersion nanocolloid solution
- a metal carrier palladium acetate as a metal salt was used, a polymer protective agent was added thereto, and the colloidal solution obtained by refluxing at 90 ° C. was used as a hydrogenation catalyst. In this case, the hydrogenation rate was as low as 40% (Comparative Example 1).
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Abstract
Description
本発明は、このような実状に鑑みてなされたものであり、水素化反応触媒としての触媒活性に優れ、高い水素添加率を実現可能な金属含有粒子の分散液を製造するための方法、および、このような金属含有粒子の分散液を用いた水素化共役ジエン系重合体の製造方法を提供することを目的とする。
本発明において、前記金属担持体が、前記金属および/または前記金属化合物として、白金族元素および/または白金族元素含有化合物を担体に担持させてなるものであることが好ましい。
本発明において、前記高分子保護剤が、側鎖に極性基を有するビニル化合物の重合体であることが好ましい。
本発明において、前記高分子保護剤が、ポリビニルピロリドンであることが好ましい。
本発明において、前記金属担持体と、前記高分子保護剤との比率が、「高分子保護剤/金属担持体中の金属と金属化合物との合計」の重量比率で、好ましくは0.1~1,000であることが好ましい。
本発明の金属含有粒子の分散液の製造方法は、溶媒中、金属および/または金属化合物を担体に担持させてなる金属担持体に対し、前記金属および/または前記金属化合物に対して親和性を示す高分子保護剤を接触させることで、前記金属および/または前記金属化合物が粒子の形態にて溶媒中に分散してなる、金属含有粒子の分散液を得ることを特徴とする。
本発明の水素化共役ジエン系重合体の製造方法は、溶媒中、上述した製造方法により得られる金属含有粒子の分散液の存在下で、共役ジエン系重合体を水素化する工程を備えるものである。
水素添加率(a)は、水素添加前のアクリロニトリル-ブタジエン共重合体のヨウ素価、および水素添加後のアクリロニトリル-ブタジエン共重合体のヨウ素価を測定し、これらの割合から求めた。なお、ヨウ素価は、JIS K6235に準じて測定した。
水素添加率(b)
水素添加率(b)は、1,2-ジメチル-1-シクロヘキセンおよび1,2-ジメチル-1-シクロヘキサンの量をガスクロマトグラフィーを用いて測定し、割合から求めた。
具体的には、FID検出器付きガスクロマト装置(Agilent Technologies社製)を、キャピラリーカラムとして、HP-1(60m×250μm×1.0μm)を用い、試料注入量:1.0μL、スプリット比:1/50、注入口温度:140℃、検出器温度:300℃、キャリヤガス:ヘリウム、および、キャリヤガス流量:1.0ml/minとし、オーブン温度:40℃の条件で加熱を開始し、40℃で10分間保持し、次いで、250℃まで10℃/minの速度で昇温させ、さらに、280℃まで20℃/minの速度で昇温させることにより行なった。そして、得られた分析結果から、面積比率により割合を求めた。
塩化パラジウム(II)(PdCl2)3.3gを、1重量%塩酸水溶液250gに溶解させた。次いで、この溶液にシリカ98gを加えて一晩(12時間程度)静置させた後、エバポレーターにて水を蒸発させることで、粉末を得た。そして、得られた粉末を400℃、30分の条件にて焼成することで、パラジウムの酸化物がシリカに担持されてなる金属担持体PdO/SiO2を得た。得られた金属担持体PdO/SiO2中のパラジウム担持量は2重量%であった。図1(A)に、製造例1で得られた金属担持体PdO/SiO2の透過型顕微鏡写真(TEM像)を示す。
製造例1にて得られた金属担持体PdO/SiO2を、水素雰囲気下、300℃で1時間の条件にて還元処理を行うことで、シリカに担持されているパラジウムの酸化物を還元させることで、パラジウムがシリカに担持されてなる金属担持体Pd/SiO2を得た。得られた金属担持体Pd/SiO2中のパラジウム担持量は2重量%であった。
シリカ98gに代えて、アルミナ98gを使用した以外は、製造例1と同様にして、パラジウムの酸化物がアルミナに担持されてなる金属担持体PdO/Al2O3を得た。そして、得られた金属担持体PdO/Al2O3について、製造例2と同様にして、還元処理を行うことで、パラジウムがアルミナに担持されてなる金属担持体Pd/Al2O3を得た。得られた金属担持体Pd/SiO2中のパラジウム担持量は2重量%であった。
塩化パラジウム(II)(PdCl2)3.3gに代えて、ヘキサクロロ白金(IV)酸六水和物(H2PtCl6・6H2O)5.3gを使用するとともに、シリカ98gに代えて、カーボン98gを使用した以外は、製造例1と同様にして、白金の酸化物がカーボンに担持されてなる金属担持体PtO/Cを得た。そして、得られた金属担持体PtO/Cについて、製造例2と同様にして、還元処理を行うことで、白金がカーボンに担持されてなる金属担持体Pt/Cを得た。得られた金属担持体Pt/C中の白金担持量は2重量%であった。
反応器に、オレイン酸カリウム2部、イオン交換水180部、アクリロニトリル37部、およびt-ドデシルメルカプタン0.5部を、この順に仕込んだ。次いで、反応器内部を窒素で置換した後、ブタジエン63部を添加し、反応器を10℃に冷却して、クメンハイドロパーオキサイド0.01部、および硫酸第一鉄0.01部を添加した。次いで、反応器を10℃に保ったまま内容物を16時間攪拌した。その後、反応器内へ10重量%のハイドロキノン水溶液を添加して重合反応を停止させた後、重合反応液から未反応の単量体を除去し、固形分濃度を30重量%に調整することで、アクリロニトリル-ブタジエン共重合体のラテックスを得た。なお、重合反応における、重合転化率は90%であった。また、得られたアクリロニトリル-ブタジエン共重合体のラテックスにおける共重合組成は、アクリロニトリル単位37重量%、ブタジエン単位63重量%であった。
100mlのステンレス加圧容器中に、製造例1で得られた金属担持体PdO/SiO2 0.2g、ポリビニルピロリドン(PVP、ポリスチレン換算での重量平均分子量:10,000)の30重量%水溶液2gを加え、次いで、溶液の合計量が20gとなるように、水を加えた。なお、このときの溶液中のパラジウム濃度は0.020重量%であり、「ポリビニルピロリドン/パラジウム」の重量比は150であった。次いで、100mlステンレス加圧容器内部に水素を充填し、水素にて、1MPa(ゲージ圧)まで加圧し、加圧したステンレス加圧容器を、温度20℃に設定された恒温槽中に設置された回転具に固定し、回転数36rpm、1時間の条件にて回転させることで、ステンレス加圧容器内部の撹拌を行った。そして、攪拌後の溶液について、濾過を行うことで金属担持体を回収することで、ナノコロイド溶液(a1)を得た。
ポリビニルピロリドン(PVP)の30重量%水溶液の使用量を2gから8gに変更するとともに(すなわち、「ポリビニルピロリドン/パラジウム」の重量比は600)、加圧したステンレス加圧容器を回転させ攪拌を行う際における、恒温槽の温度を20℃から50℃に変更した以外は、実施例1と同様にして、水中に、ナノオーダーのパラジウム酸化物(PdO)粒子が均一に分散してなる、ナノコロイド溶液(a2)を得た。得られたナノコロイド溶液(a2)中のパラジウム濃度は0.019重量%であった。
そして、上記にて得られたナノコロイド溶液(a2)を使用した以外は、実施例1と同様にして、製造例5で得られたアクリロニトリル-ブタジエン共重合体のラテックスの水素化反応を行い、水素化アクリロニトリル-ブタジエン共重合体(b2)を得た。得られた水素化アクリロニトリル-ブタジエン共重合体(b2)の水素添加率は95%であった。
製造例1で得られた金属担持体PdO/SiO2 0.2gに代えて、製造例2で得られた金属担持体Pd/SiO2 0.2gを使用するとともに、ステンレス加圧容器中に水素を充填しなかった以外は、実施例1と同様にして、水中に、ナノオーダーのパラジウム粒子が均一に分散してなる、ナノコロイド溶液(a3)を得た。得られたナノコロイド溶液(a3)中のパラジウム濃度は0.004重量%であった。
そして、上記にて得られたナノコロイド溶液(a3)を使用した以外は、実施例1と同様にして、製造例5で得られたアクリロニトリル-ブタジエン共重合体のラテックスの水素化反応を行い、水素化アクリロニトリル-ブタジエン共重合体(b3)を得た。得られた水素化アクリロニトリル-ブタジエン共重合体(b3)の水素添加率は90%であった。
製造例1で得られた金属担持体PdO/SiO2 0.2gに代えて、製造例3で得られた金属担持体Pd/Al2O3 0.2gを使用するとともに、ポリビニルピロリドン(PVP)の30重量%水溶液2gに代えて、ポリメチルビニルエーテル(PMVE)30重量%水溶液2gを使用した以外は、実施例1と同様にして、水中に、ナノオーダーのパラジウム粒子が均一に分散してなる、ナノコロイド溶液(a4)を得た。得られたナノコロイド溶液(a4)中のパラジウム濃度は0.012重量%であった。
そして、上記にて得られたナノコロイド溶液(a4)を使用した以外は、実施例1と同様にして、製造例5で得られたアクリロニトリル-ブタジエン共重合体のラテックスの水素化反応を行い、水素化アクリロニトリル-ブタジエン共重合体(b4)を得た。得られた水素化アクリロニトリル-ブタジエン共重合体(b4)の水素添加率は88%であった。
ポリビニルピロリドン(PVP)の30重量%水溶液2gに代えて、ポリエチレングリコール(PEG)30重量%水溶液2gを使用するとともに、溶媒として、水の代わりにメタノールを使用した以外は、実施例1と同様にして、メタノール中に、ナノオーダーのパラジウム粒子が均一に分散してなる、ナノコロイド溶液(a5)を得た。得られたナノコロイド溶液(a5)中のパラジウム濃度は0.014重量%であった。
そして、上記にて得られたナノコロイド溶液(a5)を使用した以外は、実施例1と同様にして、製造例5で得られたアクリロニトリル-ブタジエン共重合体のラテックスの水素化反応を行い、水素化アクリロニトリル-ブタジエン共重合体(b5)を得た。得られた水素化アクリロニトリル-ブタジエン共重合体(b5)の水素添加率は85%であった。
ステンレス加圧容器中に水素を充填する代わりに、水素化ホウ素ナトリウム(NaBH4)を添加した以外は、実施例1と同様にして、水中に、ナノオーダーのパラジウム酸化物(PdO)粒子が均一に分散してなる、ナノコロイド溶液(a6)を得た。得られたナノコロイド溶液(a6)中のパラジウム濃度は0.014重量%であった。
そして、上記にて得られたナノコロイド溶液(a6)を使用した以外は、実施例1と同様にして、製造例5で得られたアクリロニトリル-ブタジエン共重合体のラテックスの水素化反応を行い、水素化アクリロニトリル-ブタジエン共重合体(b6)を得た。得られた水素化アクリロニトリル-ブタジエン共重合体(b6)の水素添加率は85%であった。
製造例1で得られた金属担持体PdO/SiO2 0.2gに代えて、製造例4で得られた金属担持体Pt/C 0.2gを使用するとともに、ポリビニルピロリドン(PVP)の30重量%水溶液の使用量を2gから0.133gに変更した(すなわち、「ポリビニルピロリドン/白金」の重量比は10)以外は、実施例1と同様にして、水中に、ナノオーダーの白金粒子が均一に分散してなる、ナノコロイド溶液(a7)を得た。得られたナノコロイド溶液(a7)中の白金濃度は0.008重量%であった。
100mlのフラスコに、酢酸パラジウム0.016g、ポリビニルピロリドン(PVP)の30重量%水溶液4gを加え、次いで、溶液の合計量が40gとなるように、水/メタノール=1/9(重量比)溶液を入れた。なお、このときの溶液中のパラジウム濃度は0.020重量%であり、「ポリビニルピロリドン/パラジウム」の重量比は150であった。次いで、N2気流下、90℃にて2時間還流を行うことで、コロイド溶液(a8)を得た。得られたコロイド溶液(a8)中のパラジウム濃度は0.020重量%であった。なお、得られたコロイド溶液(a8)について、透過型顕微鏡(TEM)による観察を行ったところ、コロイド溶液(a8)中において、パラジウム粒子の存在は確認できたものの、粗大な粒子として存在しており、かつ、パラジウム粒子は、コロイド溶液(a8)中において、不均一に存在するものであった。
そして、上記にて得られたナノコロイド溶液(a8)を使用した以外は、実施例1と同様にして、製造例5で得られたアクリロニトリル-ブタジエン共重合体のラテックスの水素化反応を行い、水素化アクリロニトリル-ブタジエン共重合体(b8)を得た。得られた水素化アクリロニトリル-ブタジエン共重合体(b8)の水素添加率は40%であった。
Claims (6)
- 溶媒中、金属および/または金属化合物を担体に担持させてなる金属担持体に対し、前記金属および/または前記金属化合物に対して親和性を示す高分子保護剤を接触させることで、前記金属および/または前記金属化合物が粒子の形態にて溶媒中に分散してなる、金属含有粒子の分散液を得る、金属含有粒子の分散液の製造方法。
- 前記金属担持体が、前記金属および/または前記金属化合物として、白金族元素および/または白金族元素含有化合物を担体に担持させてなるものである請求項1に記載の金属含有粒子の分散液の製造方法。
- 前記高分子保護剤が、側鎖に極性基を有するビニル化合物の重合体である請求項1または2に記載の金属含有粒子の分散液の製造方法。
- 前記高分子保護剤が、ポリビニルピロリドンである請求項3に記載の金属含有粒子の分散液の製造方法。
- 前記金属担持体と、前記高分子保護剤との比率が、「高分子保護剤/金属担持体中の金属と金属化合物との合計」の重量比率で、好ましくは0.1~1,000である請求項1~4のいずれかに記載の金属含有粒子の分散液の製造方法。
- 溶媒中、請求項1~5のいずれかに記載の製造方法により得られた金属含有粒子の分散液の存在下で、共役ジエン系重合体を水素化する水素化共役ジエン系重合体の製造方法。
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