JP2021006606A - 触媒成分の分離方法 - Google Patents
触媒成分の分離方法 Download PDFInfo
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- JP2021006606A JP2021006606A JP2019120885A JP2019120885A JP2021006606A JP 2021006606 A JP2021006606 A JP 2021006606A JP 2019120885 A JP2019120885 A JP 2019120885A JP 2019120885 A JP2019120885 A JP 2019120885A JP 2021006606 A JP2021006606 A JP 2021006606A
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- Prior art keywords
- water
- soluble polymer
- nitrile rubber
- solution
- weight
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- 239000003054 catalyst Substances 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 40
- 229920003169 water-soluble polymer Polymers 0.000 claims abstract description 184
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 103
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 83
- 239000003960 organic solvent Substances 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000003756 stirring Methods 0.000 claims abstract description 29
- 238000005984 hydrogenation reaction Methods 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 230000001376 precipitating effect Effects 0.000 claims abstract description 6
- 238000000710 polymer precipitation Methods 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 96
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical group [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 92
- 229910052763 palladium Inorganic materials 0.000 claims description 39
- 238000004519 manufacturing process Methods 0.000 claims description 35
- 125000003277 amino group Chemical group 0.000 claims description 32
- 239000011259 mixed solution Substances 0.000 claims description 25
- 150000004678 hydrides Chemical class 0.000 claims description 17
- 230000003197 catalytic effect Effects 0.000 claims description 6
- 229920002401 polyacrylamide Polymers 0.000 claims description 4
- 238000000926 separation method Methods 0.000 abstract description 21
- 239000007788 liquid Substances 0.000 abstract 2
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- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 68
- 239000000178 monomer Substances 0.000 description 51
- 229920000642 polymer Polymers 0.000 description 33
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 21
- 239000000706 filtrate Substances 0.000 description 20
- 239000012153 distilled water Substances 0.000 description 13
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- 150000002941 palladium compounds Chemical group 0.000 description 12
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 11
- 239000007864 aqueous solution Substances 0.000 description 11
- -1 monocarboxylic acid ester Chemical class 0.000 description 11
- 229910052757 nitrogen Inorganic materials 0.000 description 11
- 238000011084 recovery Methods 0.000 description 11
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 10
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 10
- 150000002148 esters Chemical class 0.000 description 10
- 239000007787 solid Substances 0.000 description 10
- 229940018560 citraconate Drugs 0.000 description 9
- 229920001971 elastomer Polymers 0.000 description 9
- 239000005060 rubber Substances 0.000 description 9
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 9
- 229920002554 vinyl polymer Polymers 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
- 150000001993 dienes Chemical class 0.000 description 8
- 239000004816 latex Substances 0.000 description 8
- 229920000126 latex Polymers 0.000 description 8
- 150000002825 nitriles Chemical class 0.000 description 8
- 238000005406 washing Methods 0.000 description 8
- 125000004432 carbon atom Chemical group C* 0.000 description 7
- HNEGQIOMVPPMNR-IHWYPQMZSA-N citraconic acid Chemical compound OC(=O)C(/C)=C\C(O)=O HNEGQIOMVPPMNR-IHWYPQMZSA-N 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 150000003284 rhodium compounds Chemical class 0.000 description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
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- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- OAKJQQAXSVQMHS-UHFFFAOYSA-N hydrazine group Chemical group NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 6
- 238000006116 polymerization reaction Methods 0.000 description 6
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 6
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 5
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 5
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 5
- JKNCOURZONDCGV-UHFFFAOYSA-N 2-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical compound CN(C)CCOC(=O)C(C)=C JKNCOURZONDCGV-UHFFFAOYSA-N 0.000 description 4
- SYBYTAAJFKOIEJ-UHFFFAOYSA-N 3-Methylbutan-2-one Chemical compound CC(C)C(C)=O SYBYTAAJFKOIEJ-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 4
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- 238000006243 chemical reaction Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007720 emulsion polymerization reaction Methods 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 150000002576 ketones Chemical class 0.000 description 4
- 239000011976 maleic acid Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- DCBBWYIVFRLKCD-UHFFFAOYSA-N n-[2-(dimethylamino)ethyl]-2-methylprop-2-enamide Chemical compound CN(C)CCNC(=O)C(C)=C DCBBWYIVFRLKCD-UHFFFAOYSA-N 0.000 description 4
- FDPIMTJIUBPUKL-UHFFFAOYSA-N pentan-3-one Chemical compound CCC(=O)CC FDPIMTJIUBPUKL-UHFFFAOYSA-N 0.000 description 4
- 229910052703 rhodium Inorganic materials 0.000 description 4
- 239000010948 rhodium Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 239000002202 Polyethylene glycol Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 3
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 3
- 229940018557 citraconic acid Drugs 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000003995 emulsifying agent Substances 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- 239000001530 fumaric acid Substances 0.000 description 3
- 238000005227 gel permeation chromatography Methods 0.000 description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 3
- YJVFFLUZDVXJQI-UHFFFAOYSA-L palladium(ii) acetate Chemical compound [Pd+2].CC([O-])=O.CC([O-])=O YJVFFLUZDVXJQI-UHFFFAOYSA-L 0.000 description 3
- GPNDARIEYHPYAY-UHFFFAOYSA-N palladium(ii) nitrate Chemical compound [Pd+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O GPNDARIEYHPYAY-UHFFFAOYSA-N 0.000 description 3
- 229920001223 polyethylene glycol Polymers 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- QCAHYQPONLPBNQ-AATRIKPKSA-N (e)-4-cyclopentyloxy-4-oxobut-2-enoic acid Chemical compound OC(=O)\C=C\C(=O)OC1CCCC1 QCAHYQPONLPBNQ-AATRIKPKSA-N 0.000 description 2
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 2
- HMLSBRLVTDLLOI-UHFFFAOYSA-N 1-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical compound CN(C)C(C)OC(=O)C(C)=C HMLSBRLVTDLLOI-UHFFFAOYSA-N 0.000 description 2
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 2
- SDJHPPZKZZWAKF-UHFFFAOYSA-N 2,3-dimethylbuta-1,3-diene Chemical compound CC(=C)C(C)=C SDJHPPZKZZWAKF-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- XFCMNSHQOZQILR-UHFFFAOYSA-N 2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOC(=O)C(C)=C XFCMNSHQOZQILR-UHFFFAOYSA-N 0.000 description 2
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Landscapes
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Description
本発明の触媒成分の分離方法において、前記水溶性高分子溶液中の前記水溶性高分子の濃度が、1〜40重量%であることが好ましい。
本発明の触媒成分の分離方法において、前記水溶性高分子が、アミノ基含有ポリアクリルアミドであることが好ましい。
本発明の触媒成分の分離方法において、前記白金族元素が、パラジウムであることが好ましい。
アミノ基含有ポリ(メタ)アクリルアミド中における、アミノ基含有(メタ)アクリルアミド単量体単位の含有割合は、水素化ニトリルゴムからの白金族元素の分離効果をより高めるという観点より、好ましくは30〜100重量%、より好ましくは50〜100重量%、特に好ましくは70〜100重量%である。
(水素化アクリロニトリル−ブタジエン共重合体の製造)
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5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。重合転化率は90%であった。
(水溶性高分子製造用モノマーの合成)
p−メトシキフェノール0.005部、N,N−ジメチルエチレンジアミン6.0部、水酸化ナトリウム4.5部をイオン交換水35.0部に溶解した後、反応器を5℃に冷却し、さらにジクロロメタン45.0部を加えた。反応器を5℃に保ちながら撹拌し、塩化メタクリロイル9.5部を10分かけて滴下した。反応器を5℃に保ちながらさらに1時間攪拌した後、ジクロロメタンで4回抽出を行った。抽出液は無水硫酸ナトリウムで乾燥した後、溶媒をエバポレーターで除去し、N−[2−(ジメチルアミノ)エチル]メタクリルアミドを得た。
(水溶性高分子の製造)
反応器に、製造例2で得られたN−[2−(ジメチルアミノ)エチル]メタクリルアミドを29.5部、イオン交換水70.0部、過硫酸アンモニウム0.5部を仕込み、次いで、反応器内部を窒素で置換した後、反応器を30℃に加温して、30℃に保ったまま内容物を96時間攪拌した。得られた高分子水溶液をアセトン中へ滴下し、重合体を析出させた後、アセトン中から重合体を分取してアセトン洗浄を行った後、50℃で減圧乾燥することにより固体状の水溶性高分子(ポリ(N−[2−(ジメチルアミノ)エチル]メタクリルアミド))を得た。得られた水溶性高分子について、GPC測定により、ポリスチレン換算の重量平均分子量(Mw)を測定したところ、重量平均分子量(Mw)は200,000であった。
アセトンと蒸留水が重量比で1.5:1の比率となるよう混合したアセトン/水溶液に、製造例3で得られた水溶性高分子を溶かして、水溶性高分子の含有量が6.86重量%である水溶性高分子溶液を得た。
アセトンと蒸留水が重量比で2.0:1の比率となるよう混合したアセトン/水溶液に、製造例3で得られた水溶性高分子を溶かして、水溶性高分子の含有量が6.98重量%である水溶性高分子溶液を得た。
アセトンと蒸留水が重量比で1.5:1の比率となるよう混合したアセトン/水溶液に、製造例3で得られた水溶性高分子を溶かして、水溶性高分子の含有量が9.15重量%である水溶性高分子溶液を得た。
アセトンと蒸留水が重量比で2.0:1の比率となるよう混合したアセトン/水溶液に、製造例3で得られた水溶性高分子を溶かして、水溶性高分子の含有量が9.30重量%である水溶性高分子溶液を得た。
アセトンと蒸留水が重量比で1.5:1の比率となるよう混合したアセトン/水溶液に、製造例3で得られた水溶性高分子を溶かして、水溶性高分子の含有量が9.73重量%である水溶性高分子溶液を得た。
アセトンと蒸留水が重量比で2.0:1の比率となるよう混合したアセトン/水溶液に、製造例3で得られた水溶性高分子を溶かして、水溶性高分子の含有量が9.88重量%である水溶性高分子溶液を得た。
蒸留水のみ(アセトンと蒸留水の重量比で0:1)に、製造例3で得られた水溶性高分子を溶かして、水溶性高分子の含有量が6.86重量%である水溶性高分子溶液を得た。
製造例1で得られた、ろ過後の水素化アクリロニトリル−ブタジエン共重合体の溶液を一部採取し、これをセパラブルフラスコに移し、水素化アクリロニトリル−ブタジエン共重合体の濃度が7重量%となるように、アセトンを添加して濃度調整を行った後、この溶液の一部を採取して加熱減量法で水素化アクリロニトリル−ブタジエン共重合体の溶液の濃度を測定したところ、7.1重量%であった。この水素化アクリロニトリル−ブタジエン共重合体の溶液中の水素化アクリロニトリル−ブタジエン共重合体100部に対して、製造例4で得られた水溶性高分子溶液を、水溶性高分子の量が0.075部となるよう添加して、混合液を調製した。次いで、調製した混合液を、二枚パドル翼(直径80mm)を用いて、撹拌レイノルズ数(以下、撹拌Re数という)が2200となる条件で、24時間攪拌を行った。そして、24時間の撹拌により、水溶性高分子は固体となって沈降した。次いで、ろ過を行うことにより、ろ物とろ液とに分離させた。
製造例5で得られた水溶性高分子溶液を用いた以外は、実施例1と同様の操作を行った。ろ物として回収した水溶性高分子の回収率は92重量%であり、その中に含まれる水素化アクリロニトリル−ブタジエン共重合体の量は3重量%であった。また、ろ液として回収した水素化アクリロニトリル−ブタジエン共重合体中のパラジウム量は27重量ppmであり、水溶性高分子によるPd分離効率は81重量%であった。
セパラブルフラスコに量り取った水素化アクリロニトリル−ブタジエン共重合体の溶液に、水素化アクリロニトリル−ブタジエン共重合体の溶液中の水素化アクリロニトリル−ブタジエン共重合体100部に対して、製造例6で得られた水溶性高分子溶液を、水溶性高分子の量が0.1部となるよう添加した以外は、実施例1と同様の操作を行った。ろ物として回収した水溶性高分子の回収率は91重量%であり、その中に含まれる水素化アクリロニトリル−ブタジエン共重合体の量は5重量%であった。また、ろ液として回収した水素化アクリロニトリル−ブタジエン共重合体中のパラジウム量は9重量ppmであり、水溶性高分子によるPd分離効率は94重量%であった。
セパラブルフラスコに量り取った水素化アクリロニトリル−ブタジエン共重合体の溶液に、水素化アクリロニトリル−ブタジエン共重合体の溶液中の水素化アクリロニトリル−ブタジエン共重合体100部に対して、製造例7で得られた水溶性高分子溶液を、水溶性高分子の量が0.1部となるよう添加した以外は、実施例1と同様の操作を行った。ろ物として回収した水溶性高分子の回収率は94重量%であり、その中に含まれる水素化アクリロニトリル−ブタジエン共重合体の量は3重量%であった。また、ろ液として回収した水素化アクリロニトリル−ブタジエン共重合体中のパラジウム量は6重量ppmであり、水溶性高分子によるPd分離効率は96重量%であった。
セパラブルフラスコに量り取った水素化アクリロニトリル−ブタジエン共重合体の溶液に、水素化アクリロニトリル−ブタジエン共重合体の溶液中の水素化アクリロニトリル−ブタジエン共重合体100部に対して、製造例8で得られた水溶性高分子溶液を、水溶性高分子の量が0.107部となるよう添加した以外は、実施例1と同様の操作を行った。ろ物として回収した水溶性高分子の回収率は91重量%であり、その中に含まれる水素化アクリロニトリル−ブタジエン共重合体の量は5重量%であった。また、ろ液として回収した水素化アクリロニトリル−ブタジエン共重合体中のパラジウム量は26重量ppmであり、水溶性高分子によるPd分離効率は82重量%であった。
セパラブルフラスコに量り取った水素化アクリロニトリル−ブタジエン共重合体の溶液に、水素化アクリロニトリル−ブタジエン共重合体の溶液中の水素化アクリロニトリル−ブタジエン共重合体100部に対して、製造例9で得られた水溶性高分子溶液を、水溶性高分子の量が0.107部となるよう添加した以外は、実施例1と同様の操作を行った。ろ物として回収した水溶性高分子の回収率は95重量%であり、その中に含まれる水素化アクリロニトリル−ブタジエン共重合体の量は4重量%であった。また、ろ液として回収した水素化アクリロニトリル−ブタジエン共重合体中のパラジウム量は20重量ppmであり、水溶性高分子によるPd分離効率は86重量%であった。
セパラブルフラスコに量り取った水素化アクリロニトリル−ブタジエン共重合体の溶液の水素化アクリロニトリル−ブタジエン共重合体の濃度が2.5重量%になるよう濃度調整した以外は、実施例1と同様の操作を行った。ろ物として回収した水溶性高分子の回収率は93重量%であり、その中に含まれる水素化アクリロニトリル−ブタジエン共重合体の量は3重量%であった。また、ろ液として回収した水素化アクリロニトリル−ブタジエン共重合体中のパラジウム量は16重量ppmであり、水溶性高分子によるPd分離効率は89重量%であった。
セパラブルフラスコに量り取った水素化アクリロニトリル−ブタジエン共重合体の溶液の水素化アクリロニトリル−ブタジエン共重合体の濃度が9.6重量%になるよう濃度調整した以外は、実施例1と同様の操作を行った。ろ物として回収した水溶性高分子の回収率は92重量%であり、その中に含まれる水素化アクリロニトリル−ブタジエン共重合体の量は3重量%であった。また、ろ液として回収した水素化アクリロニトリル−ブタジエン共重合体中のパラジウム量は40重量ppmであり、水溶性高分子によるPd分離効率は72重量%であった。
製造例1で得られた、ろ過後の水素化アクリロニトリル−ブタジエン共重合体の溶液を一部採取し、これをセパラブルフラスコに移し、水素化アクリロニトリル−ブタジエン共重合体の濃度が7重量%となるように、アセトンを添加して濃度調整を行った後、この溶液の一部を採取して加熱減量法で水素化アクリロニトリル−ブタジエン共重合体の溶液の濃度を測定したところ、7.1重量%であった。この水素化アクリロニトリル−ブタジエン共重合体の溶液中の水素化アクリロニトリル−ブタジエン共重合体100部に対して、製造例10で得られた水溶性高分子溶液を、水溶性高分子の量が0.075部となるよう添加した。次いで、二枚パドル翼(直径80mm)を用いて、撹拌レイノルズ数(以下、撹拌Re数という)が2200となる条件で、24時間攪拌を行った。そして、24時間の撹拌により、水溶性高分子は固体となって沈降した。次いで、ろ過を行うことにより、ろ物とろ液とに分離させた。
Claims (6)
- ニトリルゴムを、白金族元素含有触媒の存在下で水素化反応させることで得られた、水素化ニトリルゴムの水溶性有機溶媒溶液、および、水溶性高分子溶液を混合することにより、混合液を得る混合工程と、
前記混合液を攪拌することで、水溶性高分子中に、前記白金族元素を取り込ませながら、前記水溶性高分子を析出させる水溶性高分子析出工程と、を備え、
前記水溶性高分子溶液が、前記水溶性高分子、水溶性有機溶媒および水を含有し、前記水溶性高分子溶液中の前記水溶性有機溶媒と水との重量比が、1:1〜3:1である
水素化ニトリルゴムの触媒成分の分離方法。 - 前記混合液中の水の濃度が、0.020〜0.050重量%である請求項1に記載の水素化ニトリルゴムの触媒成分の分離方法。
- 前記水溶性高分子溶液中の前記水溶性高分子の濃度が、1〜40重量%である請求項1または2に記載の水素化ニトリルゴムの触媒成分の分離方法。
- 前記水溶性高分子が、アミノ基含有ポリアクリルアミドである請求項1〜3のいずれかに記載の水素化ニトリルゴムの触媒成分の分離方法。
- 前記白金族元素が、パラジウムである請求項1〜4のいずれかに記載の水素化ニトリルゴムの触媒成分の分離方法。
- 水溶性有機溶媒中、白金族元素含有触媒の存在下で、ニトリルゴムを水素化することで、水素化ニトリルゴムの水溶性有機溶媒溶液を得る水素化工程と、
前記水素化ニトリルゴムの水溶性有機溶媒溶液、および、水溶性高分子溶液を混合することにより、混合液を得る混合工程と、
前記混合液を攪拌することで、水溶性高分子中に、前記白金族元素を取り込ませながら、前記水溶性高分子を析出させる水溶性高分子析出工程と、を備え、
前記水溶性高分子溶液が、前記水溶性高分子、水溶性有機溶媒および水を含有し、前記水溶性高分子溶液中の前記水溶性有機溶媒と水との重量比が、1:1〜3:1である
水素化ニトリルゴムの製造方法。
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