WO2023038356A1 - 폴리트리메틸렌 에테르 글리콜의 제조 방법 및 이에 따라 제조된 폴리트리메틸렌 에테르 글리콜 - Google Patents
폴리트리메틸렌 에테르 글리콜의 제조 방법 및 이에 따라 제조된 폴리트리메틸렌 에테르 글리콜 Download PDFInfo
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- WO2023038356A1 WO2023038356A1 PCT/KR2022/012946 KR2022012946W WO2023038356A1 WO 2023038356 A1 WO2023038356 A1 WO 2023038356A1 KR 2022012946 W KR2022012946 W KR 2022012946W WO 2023038356 A1 WO2023038356 A1 WO 2023038356A1
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- WO
- WIPO (PCT)
- Prior art keywords
- ether glycol
- polytrimethylene ether
- acid
- preparing
- triflate
- Prior art date
Links
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 title claims abstract description 208
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 title claims abstract description 206
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 title claims abstract description 104
- -1 polytrimethylene Polymers 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 5
- 230000007062 hydrolysis Effects 0.000 claims abstract description 50
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 50
- 239000003960 organic solvent Substances 0.000 claims abstract description 15
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 37
- 150000003839 salts Chemical class 0.000 claims description 34
- 238000001914 filtration Methods 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 238000006386 neutralization reaction Methods 0.000 claims description 27
- 238000006116 polymerization reaction Methods 0.000 claims description 27
- 239000012074 organic phase Substances 0.000 claims description 22
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 20
- 239000002253 acid Substances 0.000 claims description 20
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 17
- 239000008346 aqueous phase Substances 0.000 claims description 16
- 239000002904 solvent Substances 0.000 claims description 14
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 claims description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- 229910021645 metal ion Inorganic materials 0.000 claims description 12
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 claims description 10
- 229920000166 polytrimethylene carbonate Polymers 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid group Chemical group S(O)(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 150000001447 alkali salts Chemical class 0.000 claims description 9
- 239000003377 acid catalyst Substances 0.000 claims description 8
- 239000000178 monomer Substances 0.000 claims description 7
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 6
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 6
- 150000002009 diols Chemical class 0.000 claims description 6
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 6
- 238000004821 distillation Methods 0.000 claims description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims description 4
- 230000003472 neutralizing effect Effects 0.000 claims description 4
- 238000012643 polycondensation polymerization Methods 0.000 claims description 4
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 4
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 claims description 2
- 229910001863 barium hydroxide Inorganic materials 0.000 claims description 2
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 claims description 2
- SRSXLGNVWSONIS-UHFFFAOYSA-N benzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-N 0.000 claims description 2
- 229940092714 benzenesulfonic acid Drugs 0.000 claims description 2
- NYENCOMLZDQKNH-UHFFFAOYSA-K bis(trifluoromethylsulfonyloxy)bismuthanyl trifluoromethanesulfonate Chemical compound [Bi+3].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F NYENCOMLZDQKNH-UHFFFAOYSA-K 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
- UQSQSQZYBQSBJZ-UHFFFAOYSA-N fluorosulfonic acid Chemical compound OS(F)(=O)=O UQSQSQZYBQSBJZ-UHFFFAOYSA-N 0.000 claims description 2
- WGJJZRVGLPOKQT-UHFFFAOYSA-K lanthanum(3+);trifluoromethanesulfonate Chemical compound [La+3].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F WGJJZRVGLPOKQT-UHFFFAOYSA-K 0.000 claims description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 2
- 239000001095 magnesium carbonate Substances 0.000 claims description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 2
- 239000000347 magnesium hydroxide Substances 0.000 claims description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- WYRSPTDNOIZOGA-UHFFFAOYSA-K neodymium(3+);trifluoromethanesulfonate Chemical compound [Nd+3].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F WYRSPTDNOIZOGA-UHFFFAOYSA-K 0.000 claims description 2
- DHRLEVQXOMLTIM-UHFFFAOYSA-N phosphoric acid;trioxomolybdenum Chemical compound O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.OP(O)(O)=O DHRLEVQXOMLTIM-UHFFFAOYSA-N 0.000 claims description 2
- IYDGMDWEHDFVQI-UHFFFAOYSA-N phosphoric acid;trioxotungsten Chemical compound O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.OP(O)(O)=O IYDGMDWEHDFVQI-UHFFFAOYSA-N 0.000 claims description 2
- HZXJVDYQRYYYOR-UHFFFAOYSA-K scandium(iii) trifluoromethanesulfonate Chemical compound [Sc+3].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F HZXJVDYQRYYYOR-UHFFFAOYSA-K 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 claims description 2
- AHZJKOKFZJYCLG-UHFFFAOYSA-K trifluoromethanesulfonate;ytterbium(3+) Chemical compound [Yb+3].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F AHZJKOKFZJYCLG-UHFFFAOYSA-K 0.000 claims description 2
- JPJIEXKLJOWQQK-UHFFFAOYSA-K trifluoromethanesulfonate;yttrium(3+) Chemical compound [Y+3].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F JPJIEXKLJOWQQK-UHFFFAOYSA-K 0.000 claims description 2
- WJPWYVWFKYPSJS-UHFFFAOYSA-J trifluoromethanesulfonate;zirconium(4+) Chemical compound [Zr+4].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F WJPWYVWFKYPSJS-UHFFFAOYSA-J 0.000 claims description 2
- 239000013638 trimer Substances 0.000 claims description 2
- KZWJWYFPLXRYIL-UHFFFAOYSA-N 1,1,2,2-tetrafluoroethanesulfonic acid Chemical compound OS(=O)(=O)C(F)(F)C(F)F KZWJWYFPLXRYIL-UHFFFAOYSA-N 0.000 claims 1
- 238000000746 purification Methods 0.000 abstract description 9
- 230000000704 physical effect Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 29
- 238000005191 phase separation Methods 0.000 description 19
- 150000002148 esters Chemical class 0.000 description 14
- 239000000047 product Substances 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000006227 byproduct Substances 0.000 description 8
- 239000002994 raw material Substances 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate group Chemical group S(=O)(=O)([O-])[O-] QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 5
- 229920005862 polyol Polymers 0.000 description 5
- 150000003077 polyols Chemical class 0.000 description 5
- 229920002635 polyurethane Polymers 0.000 description 5
- 239000004814 polyurethane Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 125000004185 ester group Chemical group 0.000 description 4
- 238000006068 polycondensation reaction Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- CRYATLIDHPPXDV-UHFFFAOYSA-N oxetene Chemical compound C1OC=C1 CRYATLIDHPPXDV-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000007127 saponification reaction Methods 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920001451 polypropylene glycol Polymers 0.000 description 2
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000007848 Bronsted acid Substances 0.000 description 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 1
- 239000002841 Lewis acid Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- CCIVGXIOQKPBKL-UHFFFAOYSA-M ethanesulfonate Chemical compound CCS([O-])(=O)=O CCIVGXIOQKPBKL-UHFFFAOYSA-M 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000011552 falling film Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 150000007517 lewis acids Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- AHHWIHXENZJRFG-UHFFFAOYSA-N oxetane Chemical compound C1COC1 AHHWIHXENZJRFG-UHFFFAOYSA-N 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920003226 polyurethane urea Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 239000003930 superacid Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- 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
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/34—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
-
- 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
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/34—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
- C08G65/46—Post-polymerisation treatment, e.g. recovery, purification, drying
Definitions
- the present invention relates to a process for preparing polytrimethylene ether glycol and the polytrimethylene ether glycol prepared thereby.
- Polytrimethylene ether glycol (PO3G), an ether-based polyol based on oxetene or 1,3-propanediol (1,3-PDO), has properties of polyurethane that are differentiated due to its unique crystal structure. can be granted PO3G-applied polyurethane, which shows excellent mechanical properties compared to high elastic resilience, is suitable for applications different from existing polyether-based polyols such as PEG (Poly ethylene glycol), PPG (Poly propylene glycol), and PTMG (Poly tetramethylene glycol). Since it can be applied, many studies have been conducted.
- PEG Poly ethylene glycol
- PPG Poly propylene glycol
- PTMG Poly tetramethylene glycol
- Methods for producing polytrimethylene ether glycol are largely classified into two types.
- the condensation polymerization reaction is to react 1,3-propanediol under an acid catalyst for a long time.
- some polymer chains are present in the form of an acid ester by reacting an acid catalyst with a monomer. It is a substance that needs to be removed in the process of obtaining methylene ether glycol.
- the purification process of polytrimethylene ether glycol goes through several stages of purification, which generally include hydrolysis, neutralization, and filtration.
- Hydrolysis is the process of converting an acid ester into a hydroxyl group after polymerization.
- Polytrimethylene ether glycol of high molecular weight has high viscosity, and as the chain lengthens, the hydrophobic property increases, and the polarity difference between the polymer and water hinders compatibility. For this reason, there is a problem in that some chain ends remain as acid esters even after hydrolysis.
- a neutralization step with a base is required to neutralize the residual acid.
- the remaining acid ester reacts with a base to produce a basic substance.
- the resulting basic material is difficult to remove in a subsequent process and may affect alkalinity, causing deterioration in the quality of polytrimethylene ether glycol and polyurethane and polyurethane urea using the same as a raw material.
- an aqueous phase and an organic phase are mixed in the form of an emulsion.
- the aqueous phase containing the salt is trapped inside the organic phase containing the polytrimethylene ether glycol, so it is difficult to remove the salt through simple phase separation, and the water is evaporated and then removed through filtration.
- the larger the particle size of the salt the less the pores of the filter are clogged, the faster the filtration rate, and the higher the filtration efficiency, so the possibility of being incorporated into the polytrimethylene ether glycol is low.
- the particle size of the salt is fine, salt particles may be incorporated into the polytrimethylene ether glycol even after filtration, which causes the alkalinity of the final polytrimethylene ether glycol to increase.
- the alkalinity of poly raw materials such as polytrimethylene ether glycol is managed as an item called CPR (Controlled polymerization rate).
- the inventors of the present invention completed the present invention by confirming that the above problems can be solved when a series of steps are performed as will be described later as a result of studying an efficient purification method of high molecular weight polytrimethylene ether glycol.
- An object of the present invention is to provide a method for preparing polytrimethylene ether glycol capable of effectively removing reaction by-products and salts generated in a purification process, and the polytrimethylene ether glycol prepared thereby.
- the present invention comprises the steps of preparing a polymerization product by polycondensation of a diol monomer in the presence of an acid catalyst (step 1); preparing a polymerization product as a hydrolysis mixture using an organic solvent and water (step 2); neutralizing the hydrolysis mixture with a basic salt (step 3); After neutralization, the aqueous and organic phases are separated (step 4); and filtering out salts present in the organic phase (Step 5).
- the present invention provides a polytrimethylene ether glycol prepared through the above preparation method.
- the present invention provides polytrimethylene ether glycol having a number average molecular weight of 1000 to 5000 g/mol and a milliequivalent base of 3 or less per 30 kg of polytrimethylene ether glycol.
- polytrimethylene ether glycol is purified by converting the ester group into a hydroxyl group through a hydrolysis process and neutralizing the residual acid. In addition, salts generated during hydrolysis and neutralization are finally removed through filtration.
- the degree of hydrolysis of the acid ester is increased, and the phenomenon of emulsification after the neutralization step is prevented, thereby separating the aqueous phase and the organic phase. It is characterized in that it is possible to increase the purification efficiency in a series of purification processes by facilitating and improving the filtration efficiency by stably causing the growth of salt during the removal of water in the organic phase.
- Step 1 of the present invention is a step of preparing polytrimethylene ether glycol by polycondensation of a diol monomer as a reactant in the presence of an acid catalyst.
- the diol monomer is at least one selected from the group consisting of 1,3-propanediol, 1,3-propanediol dimer, and 1,3-propanediol trimer.
- the polycondensation catalyst is selected from the group consisting of Lewis acid, Bronsted acid, super acid, and mixtures thereof. More preferably, the catalyst is selected from the group consisting of inorganic acids, organic sulfonic acids, heteropolyacids and metal salts.
- the catalyst is selected from sulfuric acid, fluorosulfonic acid, phosphoric acid, p-toluenesulfonic acid, benzenesulfonic acid, phosphotungstic acid, phosphomolybdic acid, trifluoromethanesulfonic acid, 1,1,2,2-tetrafluoro As ethanesulfonic acid, 1,1,1,2,3,3-hexafluoropropanesulfonic acid, bismuth triflate, yttrium triflate, ytterbium triflate, neodymium triflate, lanthanum triflate, scandium triflate and zirconium triflate. selected from the group consisting of
- the catalyst is preferably used in a concentration of 0.1 to 20 wt%, more preferably 1 to 5 wt%, based on the weight of the reaction mixture.
- the polycondensation is performed at 150°C to 250°C, more preferably at 160°C to 220°C.
- the reaction is preferably carried out in the presence of an inert gas, preferably under nitrogen.
- Step 2 of the present invention is a step of performing hydrolysis to remove acid ester, which is a by-product of polytrimethylene ether glycol, after the polymerization step.
- a polymerization product and an organic solvent having high miscibility with water are added to dissolve a polymer material including polytrimethylene ether glycol to form a uniform property. Thereafter, even if water is added, the compatibility is not hindered and hydrolysis can proceed in a uniform state, and the acid ester produced after polymerization can be efficiently converted into a hydroxyl group.
- the solvent that can be used in the present invention is not limited as long as it is miscible with polytrimethylene ether glycol and water.
- the organic solvent is any one selected from the group consisting of methanol, ethanol, 1-propanol, isopropanol, 1-butanol, acetone, tetrahydrofuran, 1,4-dioxane, acetonitrile, and dimethylformamide More than that.
- the organic solvent is used in an amount of 0.1 to 0.9 parts by weight of the amount of water used in the hydrolysis step. More preferably, the organic solvent is 0.15 parts by weight or more, 0.20 parts by weight or more, 0.25 parts by weight or more, 0.30 parts by weight or more, or 0.35 parts by weight or more of the amount of water used in the hydrolysis step, and 0.85 parts by weight or less, 0.80 parts by weight or less, 0.75 parts by weight or less, or 0.70 parts by weight or less.
- organic solvent When the organic solvent is less than 0.1 part by weight of water, polytrimethylene ether glycol is not properly dissolved, and it may be difficult to form a uniform phase in the hydrolysis step, and when it is greater than 0.9 part by weight, In a separate solvent removal process, there may be a problem that additional process costs may occur.
- the hydrolysis step may be carried out at an appropriate temperature according to each solvent used, preferably at 30 °C to 90 °C.
- Step 3 of the present invention is a step of neutralizing the hydrolysis mixture containing residual acid using a basic salt that proceeds after the hydrolysis step.
- the basic salt is at least one selected from the group consisting of sodium carbonate, calcium carbonate, calcium hydroxide, calcium oxide, magnesium carbonate, magnesium hydroxide, magnesium oxide, barium carbonate, barium hydroxide, and barium oxide.
- the basic salt is used in an amount of 1 to 7% by weight of the amount of water introduced in the hydrolysis and neutralization steps. More preferably, the basic salt is 1.25% by weight or more, 1.5% by weight or more, 1.75% by weight or more, or 2% by weight or more, 6% by weight or less, or 5% by weight of the amount of water introduced in the hydrolysis and neutralization step. or less, 4.5% by weight or less, or 4% by weight or less.
- the basic salt is used in the above range, it is easy to neutralize acid ester and control the alkalinity of polytrimethylene ether glycol, and it is suitable for removing salts appropriately generated in phase separation and filtration steps to be described later by preventing excessive neutralization.
- the production method of the present invention by proceeding with the neutralization step after the hydrolysis step, it is possible to proceed with the above step in the presence of a solvent, and in this case, it is possible to more stably control the alkalinity of polytrimethylene ether glycol, which will be described later.
- the phase separation step and the filtration step can be performed more efficiently.
- Steps 4 and 5 of the present invention are steps of obtaining an organic phase through phase separation and removing salts in the organic phase through filtration.
- the mixture is mixed with an aqueous phase and an organic phase.
- the aqueous phase and the organic phase are emulsified after neutralization, the salt present in the aqueous phase is trapped inside the organic phase, so it is difficult to remove the salt only by phase separation, and the salt must be removed through filtration after evaporating the water. .
- a phase separation step is performed after the neutralization step so that the difference in density between polytrimethylene ether glycol and the salt formed in the neutralization step is greater than the difference in density between polytrimethylene ether glycol and sulfuric acid.
- phase separation process when the phase separation process is performed after neutralization, the amount of solvent required for phase separation can be reduced, and salts generated after neutralization can be effectively removed compared to a process in which phase separation is performed before neutralization, thereby reducing process cost. and production volume can be expanded, so process efficiency can be improved.
- the step of removing water and solvent present in the organic phase through distillation may be further included.
- the distillation conditions may be carried out under heating, at low pressure, or at normal pressure, but are not particularly limited as long as they are conditions for removing water and solvent under conditions in which side reactions do not proceed in the organic phase.
- the distillation method and usable device are not particularly limited, but a stripper, a thin film distiller, a falling film distiller, or a short path distiller may be used.
- the remaining salt is removed through filtration.
- the efficiency of hydrolysis is increased by adding an organic solvent in the hydrolysis step, the growth of salts generated in the neutralization step is stably promoted, and salts present in the organic phase are effectively removed in the final filtration step.
- the amount of salt, which is an impurity incorporated into trimethylene ether glycol, can be minimized.
- the filtration method used in the filtration step may use a generally known technique for removing salt, and is not particularly limited, but gravity filtration, centrifugal filtration, or pressure filtration may be used.
- a filter press, candle filter, pressurized leaf filter, or nutche filter may be used.
- polytrimethylene ether glycol prepared by the method for preparing polytrimethylene ether glycol is provided.
- the polytrimethylene ether glycol has a number average molecular weight of 1000 to 5000 g/mol.
- the present invention provides polytrimethylene ether glycol having a number average molecular weight of 1000 to 5000 g/mol and a milliequivalent base of 3 or less per 30 kg of polytrimethylene ether glycol.
- the equivalent of base per unit weight of the polytrimethylene ether glycol represents the above-described CPR, and CPR is usually an indicator of the concentration of a basic substance in polyol, and in the present invention, it represents the alkalinity of polytrimethylene ether glycol.
- Polytrimethylene ether glycol according to the present invention has a significantly low CPR and thus has high utilization value as a raw material for polyurethane.
- the method for measuring milliequivalents of base in polytrimethylene ether glycol is in accordance with ASTM D6437, and is specified in Examples to be described later.
- the number average molecular weight of the polytrimethylene ether glycol according to the present invention is 1500 g/mol or more, 1700 g/mol or more, or 2000 g/mol or more, and is 4000 g/mol or less, 3500 g/mol or less, or less than or equal to 3000 g/mol.
- the milliequivalents of base per 30 kg of polytrimethylene ether glycol according to the present invention may be 2.5 or less, 2 or less, 1.5 or less, or 1 or less.
- the lower the milliequivalent weight of the base the better the quality.
- the lower limit is not limited and theoretically may be 0, but may be, for example, 0.1 or more, 0.2 or more, 0.3 or more, or 0.5 or more.
- the metal ion content by weight of the polytrimethylene ether glycol is 10 ppm or less. More preferably, the metal ion content by weight of the polytrimethylene ether glycol is 8 ppm or less, 5 ppm or less, or 3 ppm or less.
- the metal ion is derived from the basic salt introduced during the production of polytrimethylene ether glycol, and as described above, when the neutralization step is performed in a state where hydrolysis is not properly performed, it is present at the chain end through a saponification reaction, It exists in the form of a salt by the acid used as a catalyst. Therefore, if hydrolysis and filtration are not performed properly, the metal ions remain in the final polytrimethylene ether glycol.
- Polytrimethylene ether glycol according to the present invention can effectively remove the metal ions by passing through the above-described preparation steps, and thus has a low metal ion content. Meanwhile, the lower the metal ion content, the better the quality.
- the lower limit is not limited and may be 0 in theory, but may be, for example, 0.1 ppm or more, 0.3 ppm or more, or 0.5 ppm or more.
- the method for producing polytrimethylene ether glycol of the present invention and the polytrimethylene ether glycol produced thereby have a high molecular weight and excellent quality, and thus are highly likely to be used as raw materials such as polyurethane resin.
- the method for preparing polytrimethylene ether glycol according to the present invention is effective in preparing high molecular weight polytrimethylene ether glycol by effectively removing reaction by-products and salts generated in the purification process.
- the polymerization product was cooled to 80° C., and isopropyl alcohol (IPA, 750 g) was added thereto and stirred for 10 minutes. Then, deionized water (1500 g) was added and hydrolysis proceeded for 4 hours. After hydrolysis, 51.56 g of Na 2 CO 3 was dissolved in 150 g of deionized water and neutralized by stirring for 1 hour. Nitrogen sparging and stirring were stopped, and the mixture was allowed to stand for 1 hour to induce phase separation, and the separated aqueous phase was discharged. Thereafter, the organic phase was heated at 120° C. for 3 hours under reduced pressure to evaporate remaining water/solvent, and filtered using a Nutche filter to obtain a polytrimethylene ether glycol product.
- IPA isopropyl alcohol
- Polytrimethylene ether glycol was prepared in the same manner as in Example 1, except that the polymerization product was cooled to 75° C. instead of 80° C., and ethanol was used instead of isopropyl alcohol.
- Polytrimethylene ether glycol was prepared in the same manner as in Example 1, except that the polymerization product was cooled to 55° C. instead of 80° C., and acetone was used instead of isopropyl alcohol.
- Polytrimethylene ether glycol was prepared in the same manner as in Example 1, except that the polymerization product was cooled to 65° C. instead of 80° C., and tetrahydrofuran was used instead of isopropyl alcohol.
- Polytrimethylene ether glycol was prepared in the same manner as in Example 1, except that polymerization was performed for 40 hours instead of 35 hours.
- Polytrimethylene ether glycol was prepared in the same manner as in Example 2, except that polymerization was performed for 40 hours instead of 35 hours.
- Polytrimethylene ether glycol was prepared in the same manner as in Example 3, except that polymerization was performed for 40 hours instead of 35 hours.
- Polytrimethylene ether glycol was prepared in the same manner as in Example 4, except that polymerization was performed for 40 hours instead of 35 hours.
- Polytrimethylene ether glycol was prepared in the same manner as in Example 1, except that IPA was not added.
- the polymerization product was cooled to 95° C. and hydrolysis was performed for 4 hours by adding deionized water (1500 g). After hydrolysis, the mixture was cooled to 80° C., and isopropyl alcohol (IPA, 750 g) was added thereto, followed by stirring for 10 minutes. Thereafter, 51.56 g of Na 2 CO 3 was dissolved in 150 g of deionized water and neutralized by stirring for 1 hour. Nitrogen sparging and stirring were stopped, and the mixture was allowed to stand for 1 hour to induce phase separation, and the separated aqueous phase was discharged. Thereafter, the organic phase was heated at 120° C. for 3 hours under reduced pressure to evaporate remaining water/solvent, and filtered using a Nutche filter to obtain a polytrimethylene ether glycol product.
- IPA isopropyl alcohol
- Polytrimethylene ether glycol was prepared in the same manner as in Example 1, except that the hydrolysis mixture was cooled to 75° C. instead of 80° C., and ethanol was used instead of isopropyl alcohol.
- Polytrimethylene ether glycol was prepared in the same manner as in Example 1, except that the hydrolysis mixture was cooled to 55° C. instead of 80° C., and acetone was used instead of isopropyl alcohol.
- Polytrimethylene ether glycol was prepared in the same manner as in Example 1, except that the hydrolysis mixture was cooled to 65° C. instead of 80° C., and tetrahydrofuran was used instead of isopropyl alcohol.
- Polytrimethylene ether glycol was prepared in the same manner as in Comparative Example 1, except that polymerization was performed for 40 hours instead of 35 hours.
- Polytrimethylene ether glycol was prepared in the same manner as in Comparative Example 2, except that polymerization was performed for 40 hours instead of 35 hours.
- Polytrimethylene ether glycol was prepared in the same manner as in Comparative Example 3, except that the hydrolysis mixture was cooled to 75 °C instead of 80 °C and ethanol was used instead of isopropyl alcohol.
- Polytrimethylene ether glycol was prepared in the same manner as in Comparative Example 4, except that the hydrolysis mixture was cooled to 55 °C instead of 80 °C and acetone was used instead of isopropyl alcohol.
- Polytrimethylene ether glycol was prepared in the same manner as in Comparative Example 5, except that the hydrolysis mixture was cooled to 65° C. instead of 80° C., and tetrahydrofuran was used instead of isopropyl alcohol.
- the number average molecular weight (Mn) was calculated according to Equation 1 below.
- Mn (g/mol) (Mid group peak area / End group peak area + 1) * 58.08 + 18.02
- the content of the sulfate group was calculated according to Equation 2 below.
- CPR values were measured according to ASTM D6437. Specifically, a blank test was performed using an automatic titrator (Metrohm, Titrino 905) with 0.005 N HCl in methanolic solution in 100 ml of methanol. Thereafter, 15 g of polytrimethylene ether glycol prepared in Examples and Comparative Examples was dissolved in 100 ml of methanol, titrated with 0.005 N HCl in methanolic solution, and alkalinity number was calculated according to Equation 4 below.
- W is the weight of the sample.
- V is the volume of the filtrate solution (L)
- A is the filtration area of the Nutche filter used
- T is the time taken for filtration.
- the method for producing polytrimethylene ether glycol according to the present invention has excellent phase separation efficiency and filtration efficiency as an organic solvent is added in the hydrolysis step, and it can be confirmed that the sulfate group is completely removed. .
- the polytrimethylene ether glycol according to the present invention has a significantly reduced CPR while maintaining a high number average molecular weight, and a very low metal ion content.
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Abstract
Description
solvent | Mn (g/mol) |
Sulfate group (mol%) |
상분리 효율 (%) |
CPR (meqOH/30kg) |
금속 이온 함량 (ppm) |
여과 효율 (L/m2hr) |
|
실시예 1 | IPA | 2256 | N/A | 37 | 0.86 | <2 | 451 |
실시예 2 | ethanol | 2244 | N/A | 39 | 0.73 | <2 | 455 |
실시예 3 | acetone | 2261 | N/A | 34 | 0.93 | <2 | 443 |
실시예 4 | THF | 2265 | N/A | 35 | 0.89 | <2 | 447 |
실시예 5 | IPA | 2855 | N/A | 34 | 0.91 | <2 | 338 |
실시예 6 | ethanol | 2851 | N/A | 36 | 0.88 | <2 | 344 |
실시예 7 | acetone | 2870 | N/A | 30 | 0.99 | <2 | 322 |
실시예 8 | THF | 2865 | N/A | 32 | 0.95 | <2 | 329 |
비교예 1 | None | 2410 | 0.27 | N/A | 30 | 58 | 230 |
비교예 2 | IPA | 2296 | 0.04 | 27 | 5.78 | 12 | 311 |
비교예 3 | ethanol | 2280 | 0.03 | 29 | 5.26 | 11 | 316 |
비교예 4 | acetone | 2303 | 0.03 | 23 | 5.94 | 13 | 305 |
비교예 5 | THF | 2305 | 0.05 | 24 | 5.83 | 12 | 309 |
비교예 6 | None | 3005 | 0.56 | N/A | 62 | 119 | 123 |
비교예 7 | IPA | 2899 | 0.09 | 22 | 10.23 | 20 | 183 |
비교예 8 | ethanol | 2881 | 0.08 | 25 | 10.08 | 19 | 185 |
비교예 9 | acetone | 2911 | 0.10 | 20 | 10.57 | 21 | 180 |
비교예 10 | THF | 2905 | 0.10 | 21 | 10.30 | 18 | 181 |
Claims (11)
- 디올 단량체를 산 촉매 존재 하에 축중합하여 중합 생성물을 제조하는 단계(단계 1);중합 생성물을 유기 용매, 및 물을 이용하여 가수 분해 혼합물로 제조하는 단계(단계 2);가수 분해 혼합물을 염기성 염을 이용하여 중화하는 단계(단계 3);중화 이후 수성상 및 유기상을 분리하는 단계(단계 4); 및유기상 내 존재하는 염을 여과시키는 단계(단계 5)를 포함하는,폴리트리메틸렌 에테르 글리콜의 제조 방법.
- 제1항에 있어서,디올 단량체는 1,3-프로판디올, 1,3-프로판디올 이량체, 및 1,3-프로판디올 삼량체로 구성되는 군으로부터 선택되는 어느 하나 이상인,폴리트리메틸렌 에테르 글리콜의 제조 방법.
- 제1항에 있어서,산 촉매는 황산, 플루오로술폰산, 인산, p-톨루엔술폰산, 벤젠술폰산, 포스포텅스텐산, 포스포몰리브덴산, 트리플루오로메탄술폰산, 1,1,2,2-테트라플루오로에탄술폰산, 1,1,1,2,3,3-헥사플루오로프로판술폰산, 비스무스 트리플레이트, 이트륨 트리플레이트, 이터븀 트리플레이트, 네오디뮴 트리플레이트, 란탄 트리플레이트, 스칸듐 트리플레이트 및 지르코늄 트리플레이트로 구성되는 군으로부터 선택되는 어느 하나 이상인,폴리트리메틸렌 에테르 글리콜의 제조 방법.
- 제1항에 있어서,유기 용매는 메탄올, 에탄올, 1-프로판올, 이소프로판올, 1-부탄올, 아세톤, 테드라하이드로퓨란, 1,4-다이옥산, 아세토니트릴, 및 디메틸포름아마이드로 구성되는 군으로부터 선택되는 어느 하나 이상인,폴리트리메틸렌 에테르 글리콜의 제조 방법.
- 제1항에 있어서,유기 용매는 가수 분해 단계에서 사용하는 물의 양의 0.1 내지 0.9 중량부로 사용하는,폴리트리메틸렌 에테르 글리콜의 제조 방법.
- 제1항에 있어서,염기성 염은 탄산 나트륨, 탄산 칼슘, 수산화 칼슘, 산화 칼슘, 탄산 마그네슘, 수산화 마그네슘, 산화 마그네슘, 탄산 바륨, 수산화 바륨, 및 산화 바륨으로 구성되는 군으로부터 선택되는 어느 하나 이상인,폴리트리메틸렌 에테르 글리콜의 제조 방법.
- 제1항에 있어서,단계 4 이후, 유기상 내 존재하는 물과 용매를 증류를 통해 제거하는 단계를 더 포함하는,폴리트리메틸렌 에테르 글리콜의 제조 방법.
- 제1항 내지 7항 중 어느 한 항에 따른 폴리트리메틸렌 에테르 글리콜의 제조 방법에 의해 제조되는,폴리트리메틸렌 에테르 글리콜.
- 제8항에 있어서,상기 폴리트리메틸렌 에테르 글리콜의 수평균분자량은 1000 내지 5000 g/mol인,폴리트리메틸렌 에테르 글리콜.
- 수평균분자량이 1000 내지 5000 g/mol이고,폴리트리메틸렌 에테르 글리콜 30 kg 당 염기의 밀리당량이 3 이하인,폴리트리메틸렌 에테르 글리콜.
- 제10항에 있어서,폴리트리메틸렌 에테르 글리콜 중량 기준 금속 이온 함량이 10 ppm 이하인,폴리트리메틸렌 에테르 글리콜.
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KR20070024607A (ko) * | 2004-06-18 | 2007-03-02 | 이 아이 듀폰 디 네모아 앤드 캄파니 | 폴리트리메틸렌 에테르 글리콜의 제조 방법 |
KR20080035697A (ko) * | 2005-08-16 | 2008-04-23 | 이 아이 듀폰 디 네모아 앤드 캄파니 | 폴리트리메틸렌 에테르 글리콜의 제조 |
KR20080089491A (ko) * | 2006-01-20 | 2008-10-06 | 이 아이 듀폰 디 네모아 앤드 캄파니 | 폴리트리메틸렌 에테르 글리콜의 제조 |
US20110112331A1 (en) * | 2009-11-09 | 2011-05-12 | E.I. Du Pont De Nemours And Company | Method for phase separation of polytrimethylene ether glycol in salt solution |
KR20190038162A (ko) * | 2017-09-29 | 2019-04-08 | 에스케이케미칼 주식회사 | 폴리트리메틸렌 에테르 글리콜 및 이의 제조 방법 |
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- 2022-08-30 CN CN202280059652.5A patent/CN117897430A/zh active Pending
- 2022-08-30 WO PCT/KR2022/012946 patent/WO2023038356A1/ko active Application Filing
- 2022-09-06 TW TW111133750A patent/TW202319438A/zh unknown
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KR20070024607A (ko) * | 2004-06-18 | 2007-03-02 | 이 아이 듀폰 디 네모아 앤드 캄파니 | 폴리트리메틸렌 에테르 글리콜의 제조 방법 |
KR20080035697A (ko) * | 2005-08-16 | 2008-04-23 | 이 아이 듀폰 디 네모아 앤드 캄파니 | 폴리트리메틸렌 에테르 글리콜의 제조 |
KR20080089491A (ko) * | 2006-01-20 | 2008-10-06 | 이 아이 듀폰 디 네모아 앤드 캄파니 | 폴리트리메틸렌 에테르 글리콜의 제조 |
US20110112331A1 (en) * | 2009-11-09 | 2011-05-12 | E.I. Du Pont De Nemours And Company | Method for phase separation of polytrimethylene ether glycol in salt solution |
KR20190038162A (ko) * | 2017-09-29 | 2019-04-08 | 에스케이케미칼 주식회사 | 폴리트리메틸렌 에테르 글리콜 및 이의 제조 방법 |
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