WO2023101340A1 - 디이소시아네이트의 제조방법 - Google Patents
디이소시아네이트의 제조방법 Download PDFInfo
- Publication number
- WO2023101340A1 WO2023101340A1 PCT/KR2022/018934 KR2022018934W WO2023101340A1 WO 2023101340 A1 WO2023101340 A1 WO 2023101340A1 KR 2022018934 W KR2022018934 W KR 2022018934W WO 2023101340 A1 WO2023101340 A1 WO 2023101340A1
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- WO
- WIPO (PCT)
- Prior art keywords
- temperature
- diisocyanate
- pressure
- bis
- purification step
- Prior art date
Links
- 125000005442 diisocyanate group Chemical group 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000000746 purification Methods 0.000 claims description 67
- -1 1,2-xylylene Chemical group 0.000 claims description 43
- 238000004821 distillation Methods 0.000 claims description 43
- 238000006243 chemical reaction Methods 0.000 claims description 31
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 claims description 21
- FDLQZKYLHJJBHD-UHFFFAOYSA-N [3-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC(CN)=C1 FDLQZKYLHJJBHD-UHFFFAOYSA-N 0.000 claims description 18
- 239000002904 solvent Substances 0.000 claims description 18
- 239000010409 thin film Substances 0.000 claims description 18
- 150000004985 diamines Chemical class 0.000 claims description 17
- 239000011541 reaction mixture Substances 0.000 claims description 17
- 239000012535 impurity Substances 0.000 claims description 11
- 238000005292 vacuum distillation Methods 0.000 claims description 11
- ISKQADXMHQSTHK-UHFFFAOYSA-N [4-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=C(CN)C=C1 ISKQADXMHQSTHK-UHFFFAOYSA-N 0.000 claims description 10
- 238000009835 boiling Methods 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 8
- BDYVWDMHYNGVGE-UHFFFAOYSA-N [2-(aminomethyl)cyclohexyl]methanamine Chemical compound NCC1CCCCC1CN BDYVWDMHYNGVGE-UHFFFAOYSA-N 0.000 claims description 3
- QLBRROYTTDFLDX-UHFFFAOYSA-N [3-(aminomethyl)cyclohexyl]methanamine Chemical compound NCC1CCCC(CN)C1 QLBRROYTTDFLDX-UHFFFAOYSA-N 0.000 claims description 3
- OXIKYYJDTWKERT-UHFFFAOYSA-N [4-(aminomethyl)cyclohexyl]methanamine Chemical compound NCC1CCC(CN)CC1 OXIKYYJDTWKERT-UHFFFAOYSA-N 0.000 claims description 2
- 238000003860 storage Methods 0.000 abstract description 11
- 230000007774 longterm Effects 0.000 abstract description 7
- 238000007670 refining Methods 0.000 abstract 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 11
- 239000012948 isocyanate Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 10
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- RFFLAFLAYFXFSW-UHFFFAOYSA-N 1,2-dichlorobenzene Chemical compound ClC1=CC=CC=C1Cl RFFLAFLAYFXFSW-UHFFFAOYSA-N 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 5
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 5
- 150000002513 isocyanates Chemical class 0.000 description 5
- 229910052726 zirconium Inorganic materials 0.000 description 5
- UZFMOKQJFYMBGY-UHFFFAOYSA-N 4-hydroxy-TEMPO Chemical group CC1(C)CC(O)CC(C)(C)N1[O] UZFMOKQJFYMBGY-UHFFFAOYSA-N 0.000 description 4
- 238000004925 denaturation Methods 0.000 description 4
- 230000036425 denaturation Effects 0.000 description 4
- 238000004817 gas chromatography Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- UXBLSWOMIHTQPH-UHFFFAOYSA-N 4-acetamido-TEMPO Chemical group CC(=O)NC1CC(C)(C)N([O])C(C)(C)C1 UXBLSWOMIHTQPH-UHFFFAOYSA-N 0.000 description 2
- SFXHWRCRQNGVLJ-UHFFFAOYSA-N 4-methoxy-TEMPO Chemical group COC1CC(C)(C)N([O])C(C)(C)C1 SFXHWRCRQNGVLJ-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- GHXPTDPKJYFMOE-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)cyclohexane Chemical compound O=C=NCC1CCCCC1CN=C=O GHXPTDPKJYFMOE-UHFFFAOYSA-N 0.000 description 1
- XSCLFFBWRKTMTE-UHFFFAOYSA-N 1,3-bis(isocyanatomethyl)cyclohexane Chemical compound O=C=NCC1CCCC(CN=C=O)C1 XSCLFFBWRKTMTE-UHFFFAOYSA-N 0.000 description 1
- OHLKMGYGBHFODF-UHFFFAOYSA-N 1,4-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=C(CN=C=O)C=C1 OHLKMGYGBHFODF-UHFFFAOYSA-N 0.000 description 1
- OCJBOOLMMGQPQU-UHFFFAOYSA-N 1,4-dichlorobenzene Chemical compound ClC1=CC=C(Cl)C=C1 OCJBOOLMMGQPQU-UHFFFAOYSA-N 0.000 description 1
- FWWWRCRHNMOYQY-UHFFFAOYSA-N 1,5-diisocyanato-2,4-dimethylbenzene Chemical compound CC1=CC(C)=C(N=C=O)C=C1N=C=O FWWWRCRHNMOYQY-UHFFFAOYSA-N 0.000 description 1
- CEUQYYYUSUCFKP-UHFFFAOYSA-N 2,3-bis(2-sulfanylethylsulfanyl)propane-1-thiol Chemical compound SCCSCC(CS)SCCS CEUQYYYUSUCFKP-UHFFFAOYSA-N 0.000 description 1
- QCQCHGYLTSGIGX-GHXANHINSA-N 4-[[(3ar,5ar,5br,7ar,9s,11ar,11br,13as)-5a,5b,8,8,11a-pentamethyl-3a-[(5-methylpyridine-3-carbonyl)amino]-2-oxo-1-propan-2-yl-4,5,6,7,7a,9,10,11,11b,12,13,13a-dodecahydro-3h-cyclopenta[a]chrysen-9-yl]oxy]-2,2-dimethyl-4-oxobutanoic acid Chemical compound N([C@@]12CC[C@@]3(C)[C@]4(C)CC[C@H]5C(C)(C)[C@@H](OC(=O)CC(C)(C)C(O)=O)CC[C@]5(C)[C@H]4CC[C@@H]3C1=C(C(C2)=O)C(C)C)C(=O)C1=CN=CC(C)=C1 QCQCHGYLTSGIGX-GHXANHINSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- QYTDEUPAUMOIOP-UHFFFAOYSA-N TEMPO Chemical group CC1(C)CCCC(C)(C)N1[O] QYTDEUPAUMOIOP-UHFFFAOYSA-N 0.000 description 1
- GKXVJHDEWHKBFH-UHFFFAOYSA-N [2-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC=C1CN GKXVJHDEWHKBFH-UHFFFAOYSA-N 0.000 description 1
- 125000002723 alicyclic group Chemical group 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- RBHJBMIOOPYDBQ-UHFFFAOYSA-N carbon dioxide;propan-2-one Chemical compound O=C=O.CC(C)=O RBHJBMIOOPYDBQ-UHFFFAOYSA-N 0.000 description 1
- 150000005323 carbonate salts Chemical class 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 description 1
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- RJGHQTVXGKYATR-UHFFFAOYSA-L dibutyl(dichloro)stannane Chemical compound CCCC[Sn](Cl)(Cl)CCCC RJGHQTVXGKYATR-UHFFFAOYSA-L 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- TUKWPCXMNZAXLO-UHFFFAOYSA-N ethyl 2-nonylsulfanyl-4-oxo-1h-pyrimidine-6-carboxylate Chemical compound CCCCCCCCCSC1=NC(=O)C=C(C(=O)OCC)N1 TUKWPCXMNZAXLO-UHFFFAOYSA-N 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- GDOPTJXRTPNYNR-UHFFFAOYSA-N methyl-cyclopentane Natural products CC1CCCC1 GDOPTJXRTPNYNR-UHFFFAOYSA-N 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 229920006295 polythiol Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000012801 ultraviolet ray absorbent Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C263/00—Preparation of derivatives of isocyanic acid
- C07C263/10—Preparation of derivatives of isocyanic acid by reaction of amines with carbonyl halides, e.g. with phosgene
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C263/00—Preparation of derivatives of isocyanic acid
- C07C263/18—Separation; Purification; Stabilisation; Use of additives
- C07C263/20—Separation; Purification
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C265/00—Derivatives of isocyanic acid
- C07C265/14—Derivatives of isocyanic acid containing at least two isocyanate groups bound to the same carbon skeleton
Definitions
- the present invention relates to a method for producing diisocyanate having high purity and improved stability.
- Isocyanate compounds are compounds with high utilization value not only in the fields of chemical industry and resin industry, but also as fine chemical products including optical materials.
- Demand for xylylene diisocyanate (XDI) a representative example of an isocyanate compound, as a high value-added chemical material as a raw material for high-end optical lenses is increasing.
- isocyanates have high reactivity, and denaturation easily occurs depending on the storage environment.
- isocyanate is denatured, not only the purity is lowered, but also the transparency is lowered and white turbidity occurs, so there is a problem that is unsuitable for use in optical fields requiring excellent appearance characteristics, particularly transparency.
- a method of prescribing a stabilizer to isocyanate is used, but the stabilizer may cause coloration and has a limited effect when the stability of isocyanate itself is poor.
- An object of the present invention is to provide a method for producing diisocyanate suitable for the production of optical resins due to its high purity and excellent stability even during long-term storage.
- reaction step of reacting diamine or a salt thereof with phosgene to obtain a reaction mixture
- the purification step is performed for 16 hours or less at a temperature of less than 170 ° C., a method for producing diisocyanate is provided.
- the diamine is 1,2-xylylene diamine, 1,3-xylylene diamine, 1,4-xylylene diamine, 1,2-bis(aminomethyl)cyclohexane, 1,3-bis(aminomethyl)cyclohexane , And at least one selected from the group consisting of 1,4-bis (aminomethyl) cyclohexane,
- the diamine salt is 1,2-xylylene diamine hydrochloride, 1,3-xylylene diamine hydrochloride, 1,4-xylylene diamine hydrochloride, 1,2-bis(aminomethyl)cyclohexane hydrochloride, 1,3-bis( aminomethyl)cyclohexane hydrochloride, 1,4-bis(aminomethyl)cyclohexane hydrochloride, 1,2-xylylene diamine carbonate, 1,3-xylylene diamine carbonate, and 1,4-xylylene diamine carbonate, 1, It may be at least one selected from the group consisting of 2-bis(aminomethyl)cyclohexane carbonate, 1,3-bis(aminomethyl)cyclohexane carbonate, and 1,4-bis(aminomethyl)cyclohexane carbonate.
- the reaction step may be performed at 80 °C to 180 °C.
- the purification step may be performed at a temperature of 100 °C to 150 °C for 5 hours to 15 hours.
- the purification step may be performed by vacuum distillation and/or thin film distillation under a pressure of 0.001 to 50 kPa.
- the purification step may include removing the solvent by distilling the reaction mixture under reduced pressure at a first temperature and a first pressure; removing low-boiling point impurities by distillation under reduced pressure at a second temperature and a second pressure; and removing oligomers by thin-film distillation under a third temperature and a third pressure.
- the third temperature may be equal to or lower than the first temperature and/or the second temperature
- the third pressure may be equal to or lower than the first pressure and/or the second pressure.
- the diisocyanate may have a purity of 99% to 100%.
- diisocyanate having high purity and excellent stability even during long-term storage can be produced.
- the present inventors have studied a method for producing diisocyanate with improved stability so that denaturation such as white turbidity does not occur during long-term storage while increasing purity, and as a result, the above effects are achieved by controlling the maximum temperature and residence time in the purification step.
- the present invention was completed by confirming that it could be done.
- reaction step of reacting diamine or a salt thereof with phosgene to obtain a reaction mixture
- the purification step is performed for 16 hours or less at a temperature of less than 170 ° C., a method for producing diisocyanate is provided.
- a reaction step of reacting diamine or a salt thereof with phosgene to obtain a reaction mixture phosgenation reaction step
- the diamine is an aromatic, alicyclic, or aliphatic amine containing two amine groups in a molecule.
- the diamine is 1,2-xylylene diamine (o-xylylene diamine, o-XDA), 1,3-xylylene diamine (m-xylylene diamine, m-XDA), 1,4- Xylylene diamine (p-xylylene diamine, p-XDA), 1,2-bis(aminomethyl)cyclohexane, 1,3-bis(aminomethyl)cyclohexane, and 1,4-bis(aminomethyl)cyclo At least one selected from the group consisting of hexane, and may be selected according to the structure of the desired diisocyanate.
- the salt of the diamine refers to a salt produced by a reaction between the diamine and an acid, and may be, for example, a hydrochloride salt prepared by a reaction of diamine and anhydrous hydrochloric acid, a carbonate salt prepared by a reaction between diamine and carbonic acid, and the like.
- Diamine reacts rapidly with phosgene, but the reaction rate can be alleviated when converted into a salt in a solid state.
- diamine salts include 1,2-xylylene diamine hydrochloride, 1,3-xylylene diamine hydrochloride, 1,4-xylylene diamine hydrochloride, 1,2-bis(aminomethyl)cyclohexane hydrochloride, 1,3 -bis(aminomethyl)cyclohexane hydrochloride, 1,4-bis(aminomethyl)cyclohexane hydrochloride, 1,2-xylylene diamine carbonate, 1,3-xylylene diamine carbonate, and 1,4-xylylene diamine carbonate , At least one selected from the group consisting of 1,2-bis (aminomethyl) cyclohexane carbonate, 1,3-bis (aminomethyl) cyclohexane carbonate, and 1,4-bis (aminomethyl) cyclohexane carbonate can be used
- the preparation of the diamine salt may be performed in a solvent, and the solvent may be an aromatic hydrocarbon solvent such as benzene, toluene, xylene, or ethylbenzene; chlorinated aromatic hydrocarbon solvents such as monochlorobenzene, 1,2-dichlorobenzene, and 1,4-dichlorobenzene; Chlorinated hydrocarbon solvents such as dichloromethane, chloroform, and carbon tetrachloride may be used, and two or more of them may be mixed and used.
- aromatic hydrocarbon solvent such as benzene, toluene, xylene, or ethylbenzene
- chlorinated aromatic hydrocarbon solvents such as monochlorobenzene, 1,2-dichlorobenzene, and 1,4-dichlorobenzene
- Chlorinated hydrocarbon solvents such as dichloromethane, chloroform, and carbon tetrachloride may be used, and two or more of them may
- solvents for the phosgenation reaction after obtaining a diamine salt by reacting diamine with an acid in the solvent, the phosgenation reaction can be performed by adding phosgene without a separate purification process.
- the preparation of the diamine salt is preferably carried out at a temperature of 60 ° C or less, preferably about 5 to 30 ° C, and the temperature may temporarily rise due to the heat of reaction during the reaction, but the maximum temperature in the reactor is 90 ° C or less, or It is preferably maintained at 60 ° C or less.
- phosgene when diamine is reacted with phosgene, phosgene may be added at once at the beginning of the reaction, or partially added at the beginning of the reaction, and then the remainder may be added during the reaction.
- the temperature of phosgene is preferably -10 ° C to 0 ° C to prevent leakage of toxic phosgene and smoothly raise the temperature of the reactant.
- the temperature of the reactor may be adjusted to 80 °C to 180 °C. Preferably, it may be in the range of 100 °C or higher, or 120 °C or higher, and 150 °C or lower, or 140 °C or lower. Under the above temperature conditions, a smooth phosgenation reaction can be achieved, and thermal decomposition of diisocyanate produced can be prevented.
- TEMPO 2,2,6,6-tetramethylpiperidine-1-oxyl
- 4-acet In the group consisting of amido-2,2,6,6-tetramethylpiperidine 1-oxyl (4-acetamido-2,2,6,6-tetramethylpiperidin-1-oxyl; hereinafter referred to as 4-acetamido TEMPO)
- the content of the additive may be 0.01 to 10 parts by weight, preferably 0.1 to 5 parts by weight or 0.5 to 3 parts by
- Isocyanate groups are highly reactive, so side reactions easily occur, and impurities formed through side reactions may affect the purity, color, etc. of the isocyanate compound, so a purification step is required.
- the stability of the isocyanate compound is greatly reduced when the purification step is performed under excessively high temperature conditions or when the time of the purification step is increased. Therefore, in the present invention, the stability of diisocyanate can be improved by maintaining the temperature of the purification step at an appropriate level and controlling the total time (residence time) of the purification step.
- the purification step is performed at a temperature of less than 170 ° C. for 16 hours or less.
- the maximum temperature of the purification step is 170° C. or higher or the residence time of the purification step exceeds 16 hours, the prepared diisocyanate absorbs excessive heat and may have low stability.
- the temperature of the purification step is controlled to less than 170 ° C. and the residence time to 16 hours or less, the effect of improving the stability of diisocyanate can be secured regardless of the amount of the reaction mixture to be purified.
- the highest temperature of the purification step is maintained at 160 °C or less, or 150 °C or less.
- the lowest temperature in the purification step is not particularly limited because it does not significantly affect the stability of diisocyanate, but may be 100 ° C. or higher, or 110 ° C. or higher, considering the efficiency of the purification process.
- the residence time of the purification step may be 16 hours or less, or 15 hours or less.
- the purification step may be performed by a method generally used for purification of an isocyanate compound.
- the purification step may be performed by vacuum distillation and/or thin film distillation using a distillation tower.
- the vacuum distillation and/or thin-film distillation may be performed under a pressure of 0.001 to 50 kPa to enable high-purity purification while satisfying the above-described temperature and residence time conditions.
- distillation column used for the vacuum distillation a plate tower or a packed tower may be used without limitation.
- the theoretical number of stages of the distillation column may be, for example, 2 or more, or 5 or more, or 10 or more, and 60 or less, or 40 or less.
- the temperature is maintained at less than 170 °C, specifically 100 °C or more, or 130 °C or more, and may be 160 °C or less, or 150 °C or less.
- the pressure during vacuum distillation may be 0.001 kPa or more, or 0.005 kPa or more, or 0.01 kPa or more, and 50 kPa or less, 30 kPa or less, 10 kPa or less, or 1 kPa or less.
- the temperature and pressure during distillation under reduced pressure refer to the bottom temperature of the distillation column.
- the temperature at the top of the column may be 10 ° C. or higher, or 20 ° C. or higher, and 100 ° C. or lower, or 80 ° C. or lower, and the pressure is 0.001 kPa or higher, 0.005 kPa or higher, or 0.01 kPa or higher, similarly to the column bottom pressure. While, it may be 50 kPa or less, 30 kPa or less, 10 kPa or less, or 1 kPa or less.
- the thin film distillation may be performed using a thin film distillation apparatus having an evaporator, a condenser, and a pressure reducing unit.
- the rotational speed of the thin film distillation apparatus rotor may be 50 rpm or more, or 120 rpm or more, or 200 rpm or more, and 500 rpm or less, 400 rpm or less, or 350 rpm or less.
- the temperature is also maintained below 170 ° C, and for example, 100 ° C or higher, or 110 ° C or higher, 160 ° C or lower, 130 ° C or lower, the pressure is 0.001 kPa or higher, or 0.005 kPa or higher, or 0.01 kPa or higher, 50 kPa or less, 30 kPa or less, 10 kPa or less, or 1 kPa or less.
- the purification efficiency may be increased while the residence time of the purification step may be reduced, and thus, a high-purity diisocyanate compound may be obtained.
- the purification step may be performed in multiple stages while varying temperature and/or pressure conditions.
- the purification step may be performed by sequentially removing the solvent, removing the low-boiling point impurities, and removing the oligomer.
- the purification step is performed at a temperature of 130 to 150 ° C. and a pressure of 0.01 to 1 kPa, and vacuum distillation is performed to remove the solvent at a first temperature and a first pressure, followed by low-boiling impurities at a second temperature and a second pressure.
- a purification step may be performed by removing oligomers under a third temperature and a third pressure using a thin film distillation apparatus.
- the first to third temperatures may be the same or different, and the first to third pressures may be the same or different.
- the third temperature may be equal to or lower than the first temperature and/or the second temperature, and the third pressure may be equal to or lower than the first pressure and/or the second pressure.
- a nitrogen bubbling step may be further performed to remove unreacted phosgene and hydrogen chloride gas inside the reactor in which the phosgenation reaction is completed.
- Diisocyanate can be produced by the above-described preparation method.
- the diisocyanate is 1,2-xylylene diisocyanate, 1,3-xylylene diisocyanate, 1,4-xylylene diisocyanate, 1,2-bis(isocyanatomethyl)cyclohexane , 1,3-bis (isocyanatomethyl) cyclohexane, and 1,4-bis (isocyanatomethyl) may be one or more selected from the group consisting of cyclohexane.
- Diisocyanate prepared according to the production method of the present invention may have a purity of 99% to 100% after purification.
- the purity of the diisocyanate may be 99.2% or more, or 99.4% or more, more preferably, 100%.
- the diisocyanate is prepared through a purification step in which the temperature and residence time are controlled as described above, it has excellent stability even during long-term storage, thereby exhibiting advantages of low denaturation and excellent color and transparency.
- the diisocyanate may have a difference of 1.5% or less, or 1% or less, between the purity of the diisocyanate when stored under refrigerated conditions (4° C.) for 6 months after preparation and the initial purity immediately after preparation.
- the diisocyanate may have a purity of 98% or more, or 98.4% or more, or 98.6% or more, as measured after being stored under refrigeration (4° C.) conditions for 6 months after manufacture.
- the higher the purity after storage, the better, and theoretically may be 100%, for example, 99.5% or less, or 99% or less.
- the diisocyanate may have a cloudiness content of less than 0.8% by weight, less than 0.5% by weight, less than 0.3% by weight, or less than 0.1% by weight after storage under refrigeration (4 ° C.) conditions for 6 months after manufacture, preferably 0.1% by weight or less. Ideally, it may be 0% by weight.
- the purity of the diisocyanate, the purity after refrigerated storage, and the method for measuring the content of cloudiness may be specified in Examples to be described later.
- the diisocyanate prepared by the above-described manufacturing method of the present invention has excellent stability and high transparency, and thus can be suitably used in a polymerizable composition for manufacturing an optical device.
- the polymerizable composition may include, for example, the diisocyanate of the present invention and a polyol and/or polythiol component.
- Such a polymerizable composition has excellent transparency and low yellowing, and thus can be suitably used as an optical material for manufacturing spectacle lenses, camera lenses, and the like.
- the formed salt was cooled to room temperature, and 43 g of phosgene was introduced into the reactor, and then the reactor temperature was heated to 130°C. At this time, phosgene was prevented from leaking to the outside by using a dry ice-acetone cooler from the time phosgene was introduced to the time the reaction was terminated.
- the reactor temperature reached 130 °C, the reactor temperature was maintained at 125-135 °C for 2 hours so that the reaction solution became transparent. The completion of the reaction was confirmed when the solution became transparent.
- the reactor was cooled to room temperature while blowing nitrogen into the reactor.
- the reaction mixture from which phosgene was removed was distilled under reduced pressure using a 20-stage top plate column under the conditions of a pressure of 10.0 kPa, a bottom temperature of 150 ° C, and a top temperature of 60 ° C to remove the solvent, followed by pressure of 1.0 kPa, bottom temperature of 150 ° C, and top of the column.
- Low-boiling impurities were removed by distillation under reduced pressure at a temperature of 60 ° C., and oligomers were removed by distillation at 130 ° C. using a thin film distillation apparatus with a rotor rotating at 200 rpm at 0.5 kPa to obtain meta-xylylene diisocyanate (m-XDI). .
- the highest temperature in the purification step was 150 ° C, which is the temperature during distillation under reduced pressure, and the purification step took a total of 15 hours.
- reaction mixture from which phosgene was removed was distilled under reduced pressure using a 20-stage top plate column under pressure of 5.0 kPa, bottom temperature of 140 ° C, and top temperature of 50 ° C to remove the solvent, followed by pressure of 0.5 kPa, bottom temperature of 140 ° C, and top of the column.
- Low-boiling impurities were removed by distillation under reduced pressure at a temperature of 50 °C, and oligomers were removed by distillation at 130 °C and 0.5 kPa using a thin-film distillation apparatus rotating at 200 rpm to obtain m-XDI.
- the highest temperature in the purification step was 140 ° C., which is the temperature during distillation under reduced pressure, and the purification step took a total of 16 hours.
- reaction mixture from which phosgene was removed was distilled under reduced pressure using a 20-stage top plate column at a pressure of 5.0 kPa, a bottom temperature of 140 ° C, and a top temperature of 50 ° C to remove the solvent, followed by pressure of 0.5 kPa, bottom temperature of 140 ° C, and top of the column.
- Low-boiling impurities were removed by distillation under reduced pressure at a temperature of 50 °C, and oligomers were removed by distillation at 130 °C and 0.5 kPa using a thin-film distillation apparatus rotating at 200 rpm to obtain m-XDI.
- the highest temperature in the purification step was 140 ° C., which is the temperature during distillation under reduced pressure, and the purification step took a total of 32 hours.
- reaction mixture from which phosgene was removed was distilled under reduced pressure using a 20-stage top plate column under the conditions of a pressure of 10.0 kPa, a bottom temperature of 150 ° C, and a top temperature of 60 ° C to remove the solvent, followed by pressure of 1.0 kPa, bottom temperature of 150 ° C, and top of the column.
- Low-boiling impurities were removed by distillation under reduced pressure at a temperature of 60 °C, and oligomers were removed by distillation at 130 °C and 0.5 kPa using a thin-film distillation apparatus with a rotor rotating at 200 rpm to obtain m-XDI.
- the highest temperature in the purification step was 150 ° C., which is the temperature during distillation under reduced pressure, and the purification step took a total of 24 hours.
- reaction mixture from which phosgene was removed was distilled under reduced pressure using a 20-stage top plate column under the conditions of a pressure of 10.0 kPa, a bottom temperature of 150 ° C, and a top temperature of 60 ° C to remove the solvent, followed by pressure of 1.0 kPa, bottom temperature of 150 ° C, and top of the column.
- Low-boiling impurities were removed by distillation under reduced pressure at a temperature of 60 °C, and oligomers were removed by distillation using a thin-film distillation apparatus with a rotor rotating at 200 rpm at 0.5 kPa to obtain m-XDI.
- the highest temperature in the purification step was 150 ° C., which is the temperature during distillation under reduced pressure, and the purification step took a total of 32 hours.
- reaction mixture from which phosgene was removed was distilled under reduced pressure using a 20-stage top plate column at a pressure of 50.0 kPa, a bottom temperature of 170 ° C, and a top temperature of 80 ° C to remove the solvent, followed by pressure of 10.0 kPa, bottom temperature of 170 ° C, and top of the column.
- Low-boiling impurities were removed by distillation under reduced pressure at a temperature of 80 °C, and oligomers were removed by distillation using a thin-film distillation apparatus with a rotor rotating at 200 rpm at 0.5 kPa to obtain m-XDI.
- the highest temperature in the purification step was 170 ° C, which is the temperature during distillation under reduced pressure, and the purification step took a total of 16 hours.
- the GC used for the analysis was HP-6890 and was detected by FID.
- the column used was DB-17 (30m * 0.25mm * 0.5 ⁇ m), the carrier gas was nitrogen (1.0 mL/min), and the oven temperature was 80 °C -> 5 °C/min -> 160 °C (8 min) -> 20 °C /min -> 280 °C (18min).
- dibutyltin chloride was additionally added and stirred for 10 minutes to prepare a mixture.
- 19.2 g of 2,3-bis(2-sulfanyl ethyl sulfanyl)propane-1-thiol was added to the mixture, degassed at 5 mbar, and stirred for 1 hour to prepare a polymerizable composition.
- the polymerizable composition After filtering the polymerizable composition through a 1 ⁇ m PTFE filter, it was injected into a mold composed of a glass mold and a tape. The mold was placed in an oven and gradually heated from 10 °C to 120 °C, followed by polymerization for 20 hours. After the polymerization was completed, the mold was taken out of the oven, released, and annealed at 120 ° C. for 6 hours to prepare a plastic lens.
- the degree of clouding was visually evaluated using a general fluorescent lamp and a zirconium lamp (Y-100G).
- V.H Vol.H (Visual Haze): Haze observed under both fluorescent and zirconium lamps
- the XDI of Examples 1 and 2 prepared by setting the maximum temperature of the purification step to less than 170 ° C and adjusting the residence time of the purification step to 16 hours or less maintains excellent purity and is stored for a long period of time. It can be confirmed that the stability is excellent and cloudiness does not occur. In addition, it was confirmed that the optical elements manufactured using the XDI of Examples 1 and 2 exhibited excellent transparency.
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Abstract
Description
정제단계 최고온도 (℃) |
정제단계 체류시간 (hr) |
정제 직후 XDI 순도* | 6개월 후 XDI 순도* | 6개월 후 XDI 백탁 여부 | 백탁 물질 함량 (wt%) |
렌즈 투명도 | |
실시예1 | 150 | 15 | 99.60 | 98.60 | × | 0 | C |
실시예2 | 140 | 16 | 99.43 | 98.47 | × | 0 | C |
비교예1 | 140 | 32 | 99.52 | 98.04 | ○ | 1.2 | V.H |
비교예2 | 150 | 24 | 99.03 | 98.24 | ○ | 0.8 | S.H |
비교예3 | 150 | 32 | 99.50 | 98.21 | ○ | 1.4 | V.H |
비교예4 | 170 | 16 | 99.41 | 87.9 | ○ | 4 | V.H |
Claims (8)
- 디아민 또는 그 염을 포스겐과 반응시켜 반응 혼합물을 수득하는 반응 단계; 및상기 반응 혼합물로부터 디이소시아네이트를 분리하는 정제 단계를 포함하고,상기 정제 단계는 170 ℃ 미만의 온도에서 16 시간 이하로 수행되는, 디이소시아네이트의 제조방법.
- 제1항에 있어서,상기 디아민은 1,2-자일릴렌 디아민, 1,3-자일릴렌 디아민, 1,4-자일릴렌 디아민, 1,2-비스(아미노메틸)사이클로헥산, 1,3-비스(아미노메틸)사이클로헥산, 및 1,4-비스(아미노메틸)사이클로헥산으로 이루어지는 군에서 선택되는 1종 이상이고,상기 디아민 염은 1,2-자일릴렌 디아민 염산염, 1,3-자일릴렌 디아민 염산염, 1,4-자일릴렌 디아민 염산염, 1,2-비스(아미노메틸)사이클로헥산 염산염, 1,3-비스(아미노메틸)사이클로헥산 염산염, 1,4-비스(아미노메틸)사이클로헥산 염산염, 1,2-자일릴렌 디아민 탄산염, 1,3-자일릴렌 디아민 탄산염, 및 1,4-자일릴렌 디아민 탄산염, 1,2-비스(아미노메틸)사이클로헥산 탄산염, 1,3-비스(아미노메틸)사이클로헥산 탄산염, 및 1,4-비스(아미노메틸)사이클로헥산 탄산염으로 이루어지는 군에서 선택되는 1종 이상인, 디이소시아네이트의 제조방법.
- 제1항에 있어서,상기 반응 단계는 80 ℃ 내지 180 ℃에서 수행되는, 디이소시아네이트의 제조방법.
- 제1항에 있어서,상기 정제 단계는 100 ℃ 내지 150 ℃의 온도에서 5 시간 내지 15 시간 수행되는, 디이소시아네이트의 제조방법.
- 제1항에 있어서,상기 정제 단계는 0.001 내지 50 kPa의 압력 하에서의 감압 증류 및/또는 박막 증류에 의하여 수행되는, 디이소시아네이트의 제조방법.
- 제1항에 있어서,상기 정제 단계는,제1온도 및 제1압력 하에서 반응 혼합물을 감압 증류하여 용매를 제거하는 단계;제2온도 및 제2압력 하에서 감압 증류하여 저비점 불순물을 제거하는 단계; 및제3온도 및 제3압력 하에서 박막 증류하여 올리고머를 제거하는 단계를 포함하는 것인, 디이소시아네이트의 제조방법.
- 제6항에 있어서,상기 제3온도는, 제1온도 및/또는 제2온도와 같거나 낮고,상기 제3압력은, 제1압력 및/또는 제2압력과 같거나 낮은,디이소시아네이트의 제조방법.
- 제1항에 있어서,상기 정제 단계 후 디이소시아네이트의 순도는 99 % 내지 100 %인, 디이소시아네이트의 제조방법.
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JPH05163231A (ja) * | 1991-12-17 | 1993-06-29 | Mitsui Toatsu Chem Inc | 4,4’−ジフェニルメタンジイソシアネートの製造方法 |
KR20050089053A (ko) * | 2002-12-19 | 2005-09-07 | 바스프 악티엔게젤샤프트 | 반응 혼합물로부터 이소시아네이트를 분리하는 방법 |
KR20190139153A (ko) * | 2018-06-07 | 2019-12-17 | 우리화인켐 주식회사 | 메타크실릴렌디이소시아네이트 및 광학 렌즈의 제조방법 |
KR102217747B1 (ko) * | 2019-12-05 | 2021-02-19 | 에스케이씨 주식회사 | 디이소시아네이트 조성물 및 광학 렌즈의 제조방법 |
KR20210071802A (ko) * | 2019-12-06 | 2021-06-16 | 에스케이씨 주식회사 | 디이소시아네이트 조성물 및 광학 렌즈의 제조방법 |
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US11964931B2 (en) * | 2019-12-05 | 2024-04-23 | Sk Pucore Co., Ltd. | Method of preparing diisocyanate composition and optical lens |
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JPH05163231A (ja) * | 1991-12-17 | 1993-06-29 | Mitsui Toatsu Chem Inc | 4,4’−ジフェニルメタンジイソシアネートの製造方法 |
KR20050089053A (ko) * | 2002-12-19 | 2005-09-07 | 바스프 악티엔게젤샤프트 | 반응 혼합물로부터 이소시아네이트를 분리하는 방법 |
KR20190139153A (ko) * | 2018-06-07 | 2019-12-17 | 우리화인켐 주식회사 | 메타크실릴렌디이소시아네이트 및 광학 렌즈의 제조방법 |
KR102217747B1 (ko) * | 2019-12-05 | 2021-02-19 | 에스케이씨 주식회사 | 디이소시아네이트 조성물 및 광학 렌즈의 제조방법 |
KR20210071802A (ko) * | 2019-12-06 | 2021-06-16 | 에스케이씨 주식회사 | 디이소시아네이트 조성물 및 광학 렌즈의 제조방법 |
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