WO2020071307A1 - 高純度イソプロピルアルコール及びその製造方法 - Google Patents
高純度イソプロピルアルコール及びその製造方法Info
- Publication number
- WO2020071307A1 WO2020071307A1 PCT/JP2019/038491 JP2019038491W WO2020071307A1 WO 2020071307 A1 WO2020071307 A1 WO 2020071307A1 JP 2019038491 W JP2019038491 W JP 2019038491W WO 2020071307 A1 WO2020071307 A1 WO 2020071307A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- isopropyl alcohol
- concentration
- compound
- ppb
- carbon atoms
- Prior art date
Links
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 title claims abstract description 603
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- -1 acetal compound Chemical class 0.000 claims abstract description 244
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 claims abstract description 123
- 238000012360 testing method Methods 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 239000012299 nitrogen atmosphere Substances 0.000 claims abstract description 8
- 125000004432 carbon atom Chemical group C* 0.000 claims description 69
- 238000004821 distillation Methods 0.000 claims description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 48
- 238000005292 vacuum distillation Methods 0.000 claims description 24
- 238000009835 boiling Methods 0.000 claims description 22
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 18
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 18
- 230000001133 acceleration Effects 0.000 claims description 14
- 238000000746 purification Methods 0.000 claims description 12
- 238000006703 hydration reaction Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- 230000036571 hydration Effects 0.000 claims description 9
- 230000001965 increasing effect Effects 0.000 abstract description 7
- 239000012535 impurity Substances 0.000 description 49
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N butyric aldehyde Natural products CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 35
- NBBJYMSMWIIQGU-UHFFFAOYSA-N Propionic aldehyde Chemical compound CCC=O NBBJYMSMWIIQGU-UHFFFAOYSA-N 0.000 description 24
- 238000003860 storage Methods 0.000 description 22
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 18
- 239000000126 substance Substances 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 12
- HGBOYTHUEUWSSQ-UHFFFAOYSA-N valeric aldehyde Natural products CCCCC=O HGBOYTHUEUWSSQ-UHFFFAOYSA-N 0.000 description 12
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 11
- 238000004140 cleaning Methods 0.000 description 11
- 238000010992 reflux Methods 0.000 description 10
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 9
- 239000002994 raw material Substances 0.000 description 9
- 230000007774 longterm Effects 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- 238000001035 drying Methods 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 7
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 6
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- XNLICIUVMPYHGG-UHFFFAOYSA-N pentan-2-one Chemical compound CCCC(C)=O XNLICIUVMPYHGG-UHFFFAOYSA-N 0.000 description 6
- 238000004451 qualitative analysis Methods 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- HYTRYEXINDDXJK-UHFFFAOYSA-N Ethyl isopropyl ketone Chemical compound CCC(=O)C(C)C HYTRYEXINDDXJK-UHFFFAOYSA-N 0.000 description 4
- 239000012159 carrier gas Substances 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 238000006392 deoxygenation reaction Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 4
- TWWSMHPNERSWRN-UHFFFAOYSA-N 2-(1-propan-2-yloxyethoxy)propane Chemical compound CC(C)OC(C)OC(C)C TWWSMHPNERSWRN-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 3
- 238000004445 quantitative analysis Methods 0.000 description 3
- GMBOXSYSOOOROL-UHFFFAOYSA-N 2,2-di(propan-2-yloxy)propane Chemical compound CC(C)OC(C)(C)OC(C)C GMBOXSYSOOOROL-UHFFFAOYSA-N 0.000 description 2
- BYGQBDHUGHBGMD-UHFFFAOYSA-N 2-methylbutanal Chemical compound CCC(C)C=O BYGQBDHUGHBGMD-UHFFFAOYSA-N 0.000 description 2
- SYBYTAAJFKOIEJ-UHFFFAOYSA-N 3-Methylbutan-2-one Chemical compound CC(C)C(C)=O SYBYTAAJFKOIEJ-UHFFFAOYSA-N 0.000 description 2
- YGHRJJRRZDOVPD-UHFFFAOYSA-N 3-methylbutanal Chemical compound CC(C)CC=O YGHRJJRRZDOVPD-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000003377 acid catalyst Substances 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- DXVYLFHTJZWTRF-UHFFFAOYSA-N ethyl iso-butyl ketone Natural products CCC(=O)CC(C)C DXVYLFHTJZWTRF-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- JARKCYVAAOWBJS-UHFFFAOYSA-N hexanal Chemical compound CCCCCC=O JARKCYVAAOWBJS-UHFFFAOYSA-N 0.000 description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000001819 mass spectrum Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- JYVLIDXNZAXMDK-UHFFFAOYSA-N pentan-2-ol Chemical compound CCCC(C)O JYVLIDXNZAXMDK-UHFFFAOYSA-N 0.000 description 2
- FDPIMTJIUBPUKL-UHFFFAOYSA-N pentan-3-one Chemical compound CCC(=O)CC FDPIMTJIUBPUKL-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000001893 (2R)-2-methylbutanal Substances 0.000 description 1
- QOJSNHMWGGZTDQ-UHFFFAOYSA-N 1,1-di(propan-2-yloxy)butane Chemical compound CCCC(OC(C)C)OC(C)C QOJSNHMWGGZTDQ-UHFFFAOYSA-N 0.000 description 1
- PRCZMQMZVNJQPZ-UHFFFAOYSA-N 1,1-di(propan-2-yloxy)hexane Chemical compound CCCCCC(OC(C)C)OC(C)C PRCZMQMZVNJQPZ-UHFFFAOYSA-N 0.000 description 1
- WPQFTJIQIZDCPD-UHFFFAOYSA-N 1,1-di(propan-2-yloxy)pentane Chemical compound CCCCC(OC(C)C)OC(C)C WPQFTJIQIZDCPD-UHFFFAOYSA-N 0.000 description 1
- OMKOEKNZLXINHM-UHFFFAOYSA-N 1,1-di(propan-2-yloxy)propane Chemical compound CC(C)OC(CC)OC(C)C OMKOEKNZLXINHM-UHFFFAOYSA-N 0.000 description 1
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 1
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 1
- ZRKSXSNXRGRJTC-UHFFFAOYSA-N 2,2-di(propan-2-yloxy)pentane Chemical compound CCCC(C)(OC(C)C)OC(C)C ZRKSXSNXRGRJTC-UHFFFAOYSA-N 0.000 description 1
- FGQLGYBGTRHODR-UHFFFAOYSA-N 2,2-diethoxypropane Chemical compound CCOC(C)(C)OCC FGQLGYBGTRHODR-UHFFFAOYSA-N 0.000 description 1
- MSZRURKEXGGQMN-UHFFFAOYSA-N 2-methyl-3,3-di(propan-2-yloxy)pentane Chemical compound C(C)(C)OC(C(C)C)(CC)OC(C)C MSZRURKEXGGQMN-UHFFFAOYSA-N 0.000 description 1
- ISTJMQSHILQAEC-UHFFFAOYSA-N 2-methyl-3-pentanol Chemical compound CCC(O)C(C)C ISTJMQSHILQAEC-UHFFFAOYSA-N 0.000 description 1
- ZXNBBWHRUSXUFZ-UHFFFAOYSA-N 3-methyl-2-pentanol Chemical compound CCC(C)C(C)O ZXNBBWHRUSXUFZ-UHFFFAOYSA-N 0.000 description 1
- WVYWICLMDOOCFB-UHFFFAOYSA-N 4-methyl-2-pentanol Chemical compound CC(C)CC(C)O WVYWICLMDOOCFB-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 150000001241 acetals Chemical class 0.000 description 1
- 150000007960 acetonitrile Chemical class 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010685 alcohol synthesis reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 230000000887 hydrating effect Effects 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000035485 pulse pressure Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/50—Solvents
- C11D7/5004—Organic solvents
- C11D7/5022—Organic solvents containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/03—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by addition of hydroxy groups to unsaturated carbon-to-carbon bonds, e.g. with the aid of H2O2
- C07C29/04—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by addition of hydroxy groups to unsaturated carbon-to-carbon bonds, e.g. with the aid of H2O2 by hydration of carbon-to-carbon double bonds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
- C07C31/02—Monohydroxylic acyclic alcohols
- C07C31/10—Monohydroxylic acyclic alcohols containing three carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
- C11D2111/10—Objects to be cleaned
- C11D2111/14—Hard surfaces
- C11D2111/22—Electronic devices, e.g. PCBs or semiconductors
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/26—Organic compounds containing oxygen
- C11D7/261—Alcohols; Phenols
Definitions
- the present invention relates to high-purity isopropyl alcohol and a method for producing the same.
- Diisopropyl alcohol (also referred to as 2-propanol) is an organic solvent used in various applications, and is produced by a hydration method in which propylene is produced by a hydration reaction.
- isopropyl alcohol is manufactured in a petrochemical complex that can supply propylene as a raw material, and after manufacture, it is transported to a demand area and stored in a storage tank. As described above, isopropyl alcohol is often stored for a long period of time from production to use. Therefore, an increase in impurities in isopropyl alcohol during long-term storage poses a serious problem.
- isopropyl alcohol whose impurities have increased due to long-term storage, is used for cleaning electronic devices such as semiconductor devices, residues derived from impurities in isopropyl alcohol may remain on the surface of the electronic device after cleaning and drying.
- Patent Document 1 organic impurities dissolved in isopropyl alcohol are aggregated with the evaporation of isopropyl alcohol to form relatively large particles, which remain on the object to be processed and become particulate contamination (particle defect). Is described.
- the concentration of organic impurities in isopropyl alcohol used as a cleaning liquid, particularly, the boiling point is higher than that of isopropyl alcohol as a residue after treatment. It is desirable to reduce the concentration of organic impurities as much as possible. Further, even if isopropyl alcohol is stored for a long period of time, isopropyl alcohol that does not increase the amount of organic impurities causing residues after washing and drying is desired.
- Patent Document 2 discloses that the presence of an electron donor for peroxy radicals generated by the oxidation reaction of isopropyl alcohol in isopropyl alcohol can suppress the progress of oxidative degradation to a high degree. It is described that ketones generated during storage of isopropyl alcohol can be significantly reduced.
- Patent Document 3 discloses that impurities having a higher boiling point than isopropyl alcohol are removed by distilling isopropyl alcohol.
- Patent Literature 3 discloses that organic impurities having a boiling point lower than that of isopropyl alcohol are removed by distillation in combination with removal of high boiling point impurities. Further, Patent Document 3 suggests that these impurities in isopropyl alcohol remain on a wafer in a semiconductor manufacturing operation and cause a defect.
- Patent Document 3 does not disclose any specific species of the high-boiling impurities and the low-boiling organic impurities, and it is not clear how any of these impurities work together to cause a problem in the semiconductor application. None is shown. For this reason, the removal of the organic impurities is at a level of obtaining a general quality as isopropyl alcohol, and only the atmospheric distillation performed in a normal industrial process is considered. As a result, the total amount of organic impurities is as high as 200 to 500 ppm (see paragraph [0018]).
- the impurities derived from the above-mentioned organic substances include an acetal compound generated by condensation of an aldehyde compound and an alcohol compound, and the acetal compound increases with time during storage. I understood that.
- An object of the present invention is to provide a high-purity isopropyl alcohol in which the concentration of an acetal compound as an impurity is low, the increase in the concentration of the acetal compound over time is suppressed, and excellent in long-term storage stability, and a method for producing the same. As an issue.
- the present inventors have conducted intensive studies in order to solve the above problems. As a result, not only is the acetal compound contained as an impurity in isopropyl alcohol (composition) directly reduced, but also the concentration of the aldehyde compound having 1 to 6 carbon atoms is controlled to 1500 ppb or less on a mass basis, thereby solving the above problem. They have found that they can be solved, and have completed the present invention. In addition, the present inventors have found that the concentration of the acetal compound can be more significantly reduced by controlling the concentration of the ketone compound having 3 to 6 carbon atoms to 2000 ppb or less on a mass basis.
- the aldehyde compound having 1 to 6 carbon atoms, or the aldehyde compound and the ketone compound having 3 to 6 carbon atoms are considered to be changed into an acetal compound during storage due to some influence.
- By reducing these impurities it is possible to suppress the increase of the acetal compound over time, and it is possible to obtain isopropyl alcohol in which the concentration of the acetal compound is maintained at a low concentration.
- the present inventors highly remove high-boiling-point organic impurities to reduce the concentration of the acetal compound to 100 ppb or less on a mass basis, and to generate the acetal compound during storage.
- the isopropyl alcohol capable of maintaining the concentration of the acetal compound at a low level of 100 ppb or less on a mass basis even after an accelerated test assuming long-term storage by removing the causative substance to a high degree was successfully found for the first time.
- the concentration of an acetal compound having 7 to 12 carbon atoms is 100 ppb or less on a mass basis
- concentration of the acetal compound is an increase within 30 times the value before the heating, and is 100 ppb or less on a mass basis.
- High-purity isopropyl alcohol maintained at the value of
- the concentration of the acetal compound is an increase within 30 times the value before the heating, and is based on mass.
- ⁇ 4> The high-purity isopropyl alcohol according to any one of ⁇ 1> to ⁇ 3>, wherein the concentration of the ketone compound having 3 to 6 carbon atoms is 2000 ppb or less on a mass basis.
- ⁇ 5> The high-purity isopropyl alcohol according to any one of ⁇ 1> to ⁇ 4>, wherein the water content is 0.1 to 100 ppm by mass.
- ⁇ 6> The high-purity isopropyl alcohol according to any one of ⁇ 1> to ⁇ 5>, wherein the isopropyl alcohol is obtained by a direct hydration method of propylene.
- ⁇ 8> The method for producing high-purity isopropyl alcohol according to ⁇ 7>, wherein in the vacuum distillation step, purification is performed such that the concentration of the ketone compound having 3 to 6 carbon atoms is reduced to 2000 ppb or less on a mass basis.
- concentration of the acetal compound which is an impurity is low, and the high-purity isopropyl alcohol excellent in long-term storage stability which suppressed the increase of the density
- the high-purity isopropyl alcohol of the present invention can be particularly preferably used as a cleaning liquid in a semiconductor manufacturing process because the concentration of an acetal compound having 7 to 12 carbon atoms is maintained at 100 ppb or less on a mass basis.
- the high-purity isopropyl alcohol according to this embodiment has the above-mentioned properties when the concentration of the acetal compound having 7 to 12 carbon atoms is 100 ppb or less and the accelerated test of heating at 80 ° C. for 4 hours under a nitrogen atmosphere is performed.
- the concentration of the acetal compound is an increase within 30 times the value before the heating, and is maintained at a value of 100 ppb or less.
- the concentration of the acetal compound (total concentration of the acetal compound), the concentration of the aldehyde compound described later (the total concentration of the aldehyde compound), the concentration of the ketone compound described below (the total concentration of the ketone compound), and the moisture described later
- the amount is a concentration or an amount based on the entire high-purity isopropyl alcohol. These concentrations or amounts are measured by a measurement method described later.
- the high-purity isopropyl alcohol according to the present embodiment has a isopropyl alcohol concentration of 99.99% or more, as shown by mass spectrometry (GC / MS) using gas chromatography, excluding water. Preferably, it means that the content is 99.999% or more.
- the acetal compound in the present embodiment is a compound represented by the following formula (1), wherein an aldehyde compound having 1 to 6 carbon atoms and a ketone compound having 3 to 6 carbon atoms are condensed with an alcohol under an acid catalyst or an alkali catalyst. Generated. For example, an acetal compound having 9 carbon atoms is produced from propionaldehyde and isopropyl alcohol.
- R 1 and R 2 each independently represent an alkyl group.
- R 3 and R 4 each independently represent a hydrogen atom or an alkyl group.
- acetal compound having 7 to 12 carbon atoms include acetone diethyl acetal, acetone diisopropyl acetal, acetaldehyde diisopropyl acetal, propionaldehyde diisopropyl acetal, butyraldehyde diisopropyl acetal, valeraldehyde diisopropyl acetal, hexanal diisopropyl acetal, acetone diisopropyl acetal, butanone
- diisopropyl acetal, 2-pentanone diisopropyl acetal, and 2-methyl-3-pentanone diisopropyl acetal examples include diisopropyl acetal, 2-pentanone diisopropyl acetal, and 2-methyl-3-pentanone diisopropyl acetal.
- the high-purity isopropyl alcohol according to this embodiment has a total concentration of such acetal compounds of 100 ppb or less, preferably 50 ppb or less, more preferably 20 ppb or less.
- a total concentration of such acetal compounds of 100 ppb or less, preferably 50 ppb or less, more preferably 20 ppb or less.
- an acetal having a boiling point higher than that of isopropyl alcohol is used in order to prevent a residue from remaining on the object after cleaning and drying.
- the lower limit of the total concentration of the acetal compound is preferably 0.1 ppb, and more preferably 0.5 ppb.
- the concentration of the acetal compound having 7 to 12 carbon atoms is as low as 100 ppb or less, but also the causative substances that generate the acetal compound during its storage are highly reduced.
- the concentration of the acetal compound is an increase within 30 times the value before the heating, and is 100 ppb or less. Value is maintained.
- the accelerated test is almost equivalent to the harshness of the isopropyl alcohol that is subjected to the increasing action of the acetal compound when the isopropyl alcohol is stored at room temperature (25 ° C.) in a dark place for 6 months.
- the high-purity isopropyl alcohol according to the present embodiment has a concentration of the acetal compound within 30 times the value before the heating when the accelerated test of heating at 120 ° C. for 4 hours under a nitrogen atmosphere is performed. It is preferable that the amount of increase is maintained at a value of 100 ppb or less.
- the property in which the increase of the acetal compound is suppressed even under such more severe conditions means that the isopropyl alcohol can be suppressed to a low concentration even if the isopropyl alcohol is subjected to a distribution or a long-term storage under a high temperature in summer, Problems caused by residues when used for cleaning electronic devices such as semiconductor devices can be greatly improved.
- the amount of increase in the concentration of the acetal compound after the accelerated test is preferably within 10 times, more preferably within 5 times the value before heating.
- the concentration of the acetal compound after the acceleration test is specifically measured by the following method. That is, 10 mL of high-purity isopropyl alcohol is put into a stainless steel (SUS) tube of about 20 mL, and nitrogen is supplied at 100 mL / min for 30 minutes to perform deoxygenation. After deoxygenation, the vessel is sealed so that oxygen does not enter, and the SUS tube is heated in an oil bath at 80 ° C. or 120 ° C. for 4 hours. After the completion of the acceleration test, the concentration of the acetal compound is measured for isopropyl alcohol in the SUS tube.
- SUS stainless steel
- the property of not significantly increasing the acetal compound in isopropyl alcohol even by such a severe acceleration test is achieved by reducing the aldehyde compound having 1 to 6 carbon atoms or the aldehyde compound and the ketone compound having 3 to 6 carbon atoms. Is done.
- the acetal compound is formed by an aldehyde compound having 1 to 6 carbon atoms or an aldehyde compound and a ketone compound having 3 to 6 carbon atoms that are inevitably contained in the production of isopropyl alcohol, and increases with time after the production. It is thought to be. Therefore, the properties in the accelerated test described above are satisfied by highly reducing these specific low-boiling organic impurities.
- the total concentration of the aldehyde compound having 1 to 6 carbon atoms contained in the high-purity isopropyl alcohol is preferably 1500 ppb or less, more preferably 500 ppb or less from the viewpoint of suppressing an increase in the acetal compound. And more preferably 150 ppb or less.
- the lower limit of the concentration of the aldehyde compound is considered to be 0 ppb because it is considered that the lower the lower the lower the lower the lower the lower the lower the lower the concentration of the aldehyde compound, the lower the possibility of acetal compound formation.
- the lower limit is preferably 1 ppb, more preferably 10 ppb, and even more preferably 50 ppb.
- the total concentration of the ketone compound having 3 to 6 carbon atoms contained in the high-purity isopropyl alcohol is preferably 2000 ppb or less, more preferably 1000 ppb, from the viewpoint of suppressing an increase in the acetal compound. Or less, more preferably 500 ppb or less.
- the lower limit of the concentration of the ketone compound is considered to be 0 ppb because it is considered that the smaller the concentration, the more the generation of the acetal compound can be suppressed.
- the lower limit is preferably 10 ppb, more preferably 50 ppb, and still more preferably 100 ppb. Note that the ketone compound is less likely to change into an acetal compound than the aldehyde compound, and the amount of the generated acetal compound is usually 1/10 or less even at the same concentration.
- the aldehyde compound and the ketone compound do not coexist, and even when they coexist, it is preferable that the concentrations of both are low.
- aldehyde compounds are more likely to form acetal compounds than ketone compounds, so it is particularly important to control the concentration range of aldehyde compounds.
- Specific examples of the aldehyde compound having 1 to 6 carbon atoms include formaldehyde, acetoaldehyde, propionaldehyde, butyraldehyde, valeraldehyde, 2-methylbutyraldehyde, isovaleraldehyde, hexanal and the like.
- ketone compound having 3 to 6 carbon atoms examples include acetone, methyl ethyl ketone, diethyl ketone, methyl propyl ketone, methyl isopropyl ketone, 4-methyl-2-pentanone, 3-methyl-2-pentanone, 2-methyl -3-pentanone and the like.
- isopropyl alcohol is an acetone reduction method of reducing acetone to synthesize isopropyl alcohol, an indirect hydration method of esterifying propylene using concentrated sulfuric acid and then hydrolyzing, or directly hydrating propylene using a catalyst. It is manufactured by a direct hydration method or the like.
- isopropyl alcohol obtained by using a method, a raw material, or the like in which an aldehyde compound is easily generated.
- isopropyl alcohol produced by the direct hydration method is preferable to use.
- the isopropyl alcohol produced by the direct hydration method contains, before purification, an acetal compound having 7 to 12 carbon atoms exceeding 100 ppb, and usually containing more than 300 ppb.
- Aldehyde compounds having 1 to 6 carbon atoms are contained in excess of 1500 ppb, and usually in excess of 3000 ppb.
- ketone compounds having 3 to 6 carbon atoms are contained in excess of 2000 ppb, and usually in excess of 4000 ppb.
- the aldehyde compound having 1 to 6 carbon atoms and / or the ketone compound having 3 to 6 carbon atoms may be contained in isopropyl alcohol as "impurities contained in propylene / acetone, which is a raw material of isopropyl alcohol", “isopropyl "By-products of alcohol synthesis reaction”, "alcohol compounds contained in isopropyl alcohol after production” and the like.
- ethylene contained as an impurity in propylene as a raw material is oxidized to produce ethanol. It is considered that ethanol is oxidized under the influence of dissolved oxygen contained in isopropyl alcohol, changes to acetaldehyde, and is contained in isopropyl alcohol as the aldehyde compound.
- alcohols such as 1-propanol, 1-butanol, 2-butanol, 2-pentanol, 4-methyl-2-pentanol, 3-methyl-2-pentanol, and 2-methyl-3-pentanol are reacted.
- the aldehyde compound and the ketone compound are impurities generated as by-products of the reaction and in the oxidation step during the reaction step, the purification step, and the storage, and are often contained in isopropyl alcohol.
- the concentration range was not strictly controlled.
- isopropyl alcohol contains an aldehyde compound having a different number of carbon atoms in addition to acetaldehyde, for example, in a reaction between propionaldehyde having 3 carbon atoms and isopropyl alcohol, an acetal compound having 9 carbon atoms is produced over time. Will increase.
- aldehyde compounds contained as impurities may condense with each other, and high-boiling organic substances may be generated during storage. These condensates may also become residues after washing and drying. Therefore, by controlling the concentration of the aldehyde compound having 1 to 6 carbon atoms in a specific range, condensation between the aldehyde compounds can be prevented.
- the high-purity isopropyl alcohol according to the present embodiment may include other impurities that are inevitably mixed in production.
- impurities that are inevitably mixed include water, organic impurities, and inorganic impurities.
- the organic impurities are organic impurities which are not separated in the step of distilling isopropyl alcohol and are mixed.
- the high-purity isopropyl alcohol according to the present embodiment preferably has a water content of 0.1 to 100 ppm.
- the water in the isopropyl alcohol is considered to be a cause of residues and a watermark after washing and drying, and may act as a catalyst. Therefore, the water content is preferably 100 ppm or less.
- the reaction for producing the acetal compound is a dehydration reaction, it is considered that the presence of water in isopropyl alcohol can suppress the production of the acetal compound in consideration of chemical equilibrium. Therefore, the water content is preferably 0.1 ppm or more. From the viewpoint of using high-purity isopropyl alcohol as a washing liquid and suppressing the generation of acetal compounds, the water content is more preferably 1 to 50 ppm, and further preferably 3 to 25 ppm.
- the total mass and the water content of the aldehyde compound and the ketone compound contained in the high-purity isopropyl alcohol according to the present embodiment satisfy the following relationship.
- the reaction for generating the acetal compound is a dehydration reaction, and it is considered that the generation of the acetal compound can be suppressed by the water present in isopropyl alcohol in consideration of the chemical equilibrium.
- isopropyl alcohol is oxidized by water present in isopropyl alcohol, and an aldehyde compound or a ketone compound serving as a raw material of the acetal compound is supplied. Therefore, it is considered that when the ratio p exceeds 1, the amount of water decreases, and the generation of acetal compounds tends to increase.
- the ratio p is less than 0.001, the aldehyde compound tends to increase, and the acetal compound may eventually increase.
- the high-purity isopropyl alcohol according to the present embodiment is further improved in storage stability by controlling the water content, and can be transported and stored for a long time. And, for example, it can be suitably used as a cleaning liquid in a semiconductor manufacturing process.
- the concentration of the organic acid in the high-purity isopropyl alcohol according to the present embodiment is preferably 10 ppm or less, more preferably 100 ppb or less, and even more preferably 10 ppb or less.
- the lower limit is preferably as low as possible, but is usually 0.1 ppb or more in view of industrial production, storage and transportation.
- the high-purity isopropyl alcohol according to the present embodiment may be manufactured by any method as long as the properties satisfying the above properties are obtained.
- crude isopropyl alcohol is purified by distillation under reduced pressure by distillation under reduced pressure to purify the concentration of the aldehyde compound having 1 to 6 carbon atoms to 1500 ppb or less on a mass basis.
- the vacuum distillation step and the atmospheric distillation step of purifying until the concentration of the acetal compound having 7 to 12 carbon atoms is reduced to 100 ppb or less on a mass basis by removing the bottom liquid by atmospheric distillation are combined. What is applied is mentioned.
- the aldehyde compound having 1 to 6 carbon atoms has high compatibility with isopropyl alcohol, and it is difficult to remove the aldehyde compound to a high degree by distillation under normal pressure. Therefore, even if the crude isopropyl alcohol is repeatedly distilled under normal pressure, it is difficult to reduce the concentration of the aldehyde compound to 1500 ppb or less.
- butyraldehyde is extremely poor in separation from isopropyl alcohol by atmospheric distillation, and it is extremely difficult to reduce the concentration of butyl aldehyde to a low concentration.
- ketone compounds having 3 to 6 carbon atoms have high compatibility with isopropyl alcohol, and it is difficult to reduce the concentration of the ketone compound to 2000 ppb or less by atmospheric distillation.
- methyl propyl ketone has remarkably poor resolvability from isopropyl alcohol, and it is extremely difficult to reduce the concentration thereof.
- the pressure of the vacuum distillation is preferably 20 kPa or less, more preferably 10 kPa or less, and even more preferably 5 kPa or less.
- the lower limit of the pressure is preferably 1 kPa or more, and more preferably 3 kPa or more, from the viewpoint of confidentiality and economy of the apparatus.
- distillation column for performing vacuum distillation those known in the art can be used without limitation, and a stage column or a packed column can be mentioned as a preferable one.
- the purpose of vacuum distillation is to reduce the causative substances (aldehyde compounds having 1 to 6 carbon atoms or ketone compounds having 3 to 6 carbon atoms) which cause the formation of acetal compounds.
- the number of stages can be set.
- the number of plate columns or the number of distillation columns in terms of plate columns is not limited, but if it is too large, the cost of distillation equipment increases, and preferably 2 to 30 plates, and more preferably 3 to 20 plates. More preferably, it is more preferably 5 to 10 stages.
- the reflux ratio in the vacuum distillation is not limited, but if it is too large, the cost of the distillation equipment increases, so that it is preferably 1 to 100, more preferably 5 to 50, further preferably 10 to 20. preferable.
- a cross flow tray, a shower tray, or the like can be used.
- the packed tower examples of the packed material include known packing materials such as Raschig rings and lessing rings.
- the material of the tower and the material of the packing are not limited, and various metals and various resins such as iron, SUS, Hastelloy, borosilicate glass, quartz glass, and fluororesin (for example, polytetrafluoroethylene) can be used.
- the number of stages in the distillation column or the number of stages of the distillation column converted into the stages is preferably from 10 to 300.
- the reflux ratio in the atmospheric distillation is not limited, but is preferably 0.5 to 50, more preferably 1 to 10.
- Other conditions of the atmospheric distillation are the same as those described for the vacuum distillation.
- the vacuum distillation step and the atmospheric distillation step are not particularly limited as long as they are performed in combination, and the vacuum distillation step may be performed first, and then the atmospheric distillation step may be performed. The opposite is also possible. From the viewpoint of elution of the material to be used and mixing of impurities during vacuum distillation, it is preferable to perform the vacuum distillation step first and then perform the atmospheric distillation step.
- the vacuum distillation step not only the concentration of the aldehyde compound having 1 to 6 carbon atoms (further, the ketone compound having 3 to 6 carbon atoms) is reduced but also the high boiling May be removed as bottom liquid.
- the purified isopropyl alcohol may be taken out from the side of the distillation column.
- the acetal compound having 7 to 12 carbon atoms cannot be removed to a high degree, so it is necessary to perform the atmospheric distillation step. .
- the concentration of the acetal compound is evaluated to be 500 ppb or less, which is the lower limit of detection. can do.
- the concentration of the aldehyde compound is evaluated to be not more than the lower limit of detection of 5000 ppb. can do.
- Example 1 Tokuyama Corporation isopropyl alcohol for electronic industry (operation for removing bottoms by atmospheric distillation) was prepared, and the following distillation operation was performed.
- distillation operation The 2 L flask was placed in a water bath, and a packed tower containing glass beads having a length of 2 m was installed. The flask was charged with 2 L of isopropyl alcohol. The pressure was reduced to 5 kPa, and distillation was performed at 50 ° C. in a water bath, 15 to 25 ° C. at the top of the tower, and ⁇ 5 to 0 ° C. in the cooler. After the distillation operation, measurement was performed according to the above-described method for measuring an aldehyde compound. As a result, acetaldehyde, propionaldehyde, and butyraldehyde were detected as the aldehyde compounds.
- the total concentration of acetaldehyde, propionaldehyde, and butyraldehyde was 100 ppb or less. It is considered that acetaldehyde, propionaldehyde, and butyraldehyde were not condensed and were discharged out of the system.
- the amount of water contained in isopropyl alcohol purified by the distillation operation was 5 ppm.
- the free acid (calculated as acetic acid) contained in isopropyl alcohol was 2 ppm.
- Example 1 An industrial isopropyl alcohol manufactured by Tokuyama Corporation was prepared, and the same accelerated test as in Example 1 was performed, except that acetaldehyde, propionaldehyde, and butyraldehyde were not distilled, to evaluate acetal compounds. As a result, the concentration of the acetal compound was increased to 2000 ppb (Table 1).
- isopropyl alcohol in which the concentrations of acetaldehyde, propionaldehyde, and butyraldehyde were not reduced had an acetal compound concentration of 2000 ppb as a result of an accelerated test, and was inferior in long-term storage stability.
- Example 2 (Production of crude isopropyl alcohol)
- propylene one containing 39972 ppm of propane, 20 ppm of ethane, 8 ppm of butene, 0.1 ppm or less of pentene, and 0.1 ppm or less of hexene as impurities was prepared.
- water a water whose pH was adjusted to 3.0 by adding phosphotungstic acid as an acid catalyst was prepared.
- Water heated to 110 ° C. is supplied to a reactor having an internal volume of 10 L at a supply rate of 18.4 kg / h (20 L / h since the density is 920 kg / m 3 ), and 1.2 kg of propylene is supplied. / H feed rate.
- the 2 L flask was placed in a water bath, and a packed tower containing glass beads having a length of 3 m (equivalent number of plates in terms of a column) of 20 was prepared.
- the flask was charged with the isopropyl alcohol obtained by the above-mentioned vacuum distillation.
- the atmospheric distillation was performed under the conditions of a reflux ratio: 3, an oil bath temperature: 120 ° C, a tower top temperature: 82 ° C, and a cooler temperature: 25 ° C.
- concentration of isopropyl alcohol in the distillate was measured by GC / MS, the concentration of water excluding water was 99.999% or higher, indicating high purity.
- Tables 3 to 5 show the results of measuring the concentrations of the acetal compound, the aldehyde compound, and the ketone compound for the obtained high-purity isopropyl alcohol.
- Table 3 also shows the results of measuring the water content of the obtained high-purity isopropyl alcohol.
- Example 3 The conditions for vacuum distillation in Example 2 (purification of crude isopropyl alcohol) were as follows: pressure: 10 kPa, reflux ratio: 3, water bath temperature: 70 ° C., tower temperature: 28 to 38 ° C., cooler temperature: ⁇ 5 to A high-purity isopropyl alcohol having a concentration of isopropyl alcohol excluding water of 99.999% or more was produced in the same manner as in Example 2 except that the temperature was changed to 0 ° C.
- Tables 3 to 5 show the results of measuring the concentrations of the acetal compound, the aldehyde compound, and the ketone compound for the obtained high-purity isopropyl alcohol.
- Table 3 also shows the results of measuring the water content of the obtained high-purity isopropyl alcohol.
- Example 4 The conditions of reduced pressure distillation in Example 2 (purification of crude isopropyl alcohol) were as follows: pressure: 5 kPa, reflux ratio: 6, water bath temperature: 50 ° C., tower top temperature: 15 to 25 ° C., cooler temperature: ⁇ 5 to Except that the temperature was changed to 0 ° C., a high-purity isopropyl alcohol having a concentration of isopropyl alcohol excluding water of 99.999% by mass or more was produced in the same manner as in Example 2.
- Tables 3 to 5 show the results of measuring the concentrations of the acetal compound, the aldehyde compound, and the ketone compound for the obtained high-purity isopropyl alcohol. Table 3 also shows the results of measuring the water content of the obtained high-purity isopropyl alcohol.
- Example 5 The conditions of vacuum distillation in Example 2 (purification of crude isopropyl alcohol) were as follows: pressure: 5 kPa, reflux ratio: 9, water bath temperature: 50 ° C., tower top temperature: 15 to 25 ° C., cooler temperature: ⁇ 5 to Except that the temperature was changed to 0 ° C., a high-purity isopropyl alcohol having a concentration of isopropyl alcohol excluding water of 99.999% by mass or more was produced in the same manner as in Example 2.
- Tables 3 to 5 show the results of measuring the concentrations of the acetal compound, the aldehyde compound, and the ketone compound for the obtained high-purity isopropyl alcohol. Table 3 also shows the results of measuring the water content of the obtained high-purity isopropyl alcohol.
- Example 6 The conditions for the atmospheric distillation in (Purification of crude isopropyl alcohol) in Example 2 were as follows: number of stages: 10 stages, reflux ratio: 1, oil bath temperature: 120 ° C, overhead temperature: 82 ° C, cooler temperature: 25 ° C In the same manner as in Example 2 except that the concentration of isopropyl alcohol excluding water was 99.999% by mass or more, high-purity isopropyl alcohol was produced.
- Tables 3 to 5 show the results of measuring the concentrations of the acetal compound, the aldehyde compound, and the ketone compound for the obtained high-purity isopropyl alcohol. Table 3 also shows the results of measuring the water content of the obtained high-purity isopropyl alcohol.
- Example 2 The vacuum distillation in Example 2 (purification of crude isopropyl alcohol) was changed to atmospheric distillation under the conditions of reflux ratio: 3, oil bath temperature: 120 ° C, tower temperature: 82 ° C, and cooler temperature: 25 ° C.
- a high-purity isopropyl alcohol having a concentration of isopropyl alcohol excluding water of 99.999% by mass or more was produced in the same manner as in Example 2 except that the isopropyl alcohol was used.
- Tables 3 to 5 show the results of measuring the concentrations of the acetal compound, the aldehyde compound, and the ketone compound for the obtained high-purity isopropyl alcohol.
- Table 3 also shows the results of measuring the water content of the obtained high-purity isopropyl alcohol.
- Example 3 The atmospheric distillation in (Purification of crude isopropyl alcohol) in Example 2 was performed under the following conditions: pressure: 20 kPa, number of stages: 10 stages, reflux ratio: 3, water bath temperature: 70 ° C., tower top temperature: 35 to 45 ° C., cooler temperature : High-purity isopropyl alcohol having a concentration of isopropyl alcohol excluding water of 99.999% by mass or more was produced in the same manner as in Example 2 except that the distillation was performed under reduced pressure at a temperature of -5 to 0 ° C.
- Tables 3 to 5 show the results of measuring the concentrations of the acetal compound, the aldehyde compound, and the ketone compound for the obtained high-purity isopropyl alcohol.
- Table 3 also shows the results of measuring the water content of the obtained high-purity isopropyl alcohol.
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Abstract
Description
<1> 炭素数7~12のアセタール化合物の濃度が、質量基準で100ppb以下であり、
窒素雰囲気下、80℃で4時間加熱する加速試験を行った場合に、前記アセタール化合物の濃度が、該加熱前の値に対して30倍以内の増加量であり、且つ、質量基準で100ppb以下の値に維持される高純度イソプロピルアルコール。
減圧蒸留により低沸分を留去することで、炭素数1~6のアルデヒド化合物の濃度が、質量基準で1500ppb以下に低減されるまで精製する減圧蒸留工程と、
常圧蒸留により缶出液を除去することで、炭素数7~12のアセタール化合物の濃度が、質量基準で100ppb以下に低減されるまで精製する常圧蒸留工程と
を組み合わせて実施する、<1>に記載の高純度イソプロピルアルコールの製造方法。
本実施形態に係る高純度イソプロピルアルコールは、炭素数7~12のアセタール化合物の濃度が100ppb以下であることに加え、窒素雰囲気下、80℃で4時間加熱する加速試験を行った場合に、上記アセタール化合物の濃度が、該加熱前の値に対して30倍以内の増加量であり、且つ、100ppb以下の値に維持されるものである。
本実施形態におけるアセタール化合物は、下記式(1)で表される化合物であり、炭素数1~6のアルデヒド化合物及び炭素数3~6のケトン化合物が酸触媒下又はアルカリ触媒下でアルコールと縮合して生成される。例えば、炭素数9のアセタール化合物は、プロピオンアルデヒドとイソプロピルアルコールとから生成される。
本実施形態において、高純度イソプロピルアルコールに含まれる炭素数1~6のアルデヒド化合物の合計の濃度は、アセタール化合物の増加を抑制する点から、1500ppb以下であることが好ましく、より好ましくは500ppb以下であり、さらに好ましくは150ppb以下である。また、該アルデヒド化合物の濃度の下限値は、より少なければアセタール化合物の生成を抑制できると考えられるため、0ppbであることが好ましい。ただし、イソプロピルアルコールの工業的生産を考慮すると、下限値は1ppbであることが好ましく、より好ましくは10ppbであり、さらに好ましくは50ppbである。
本実施形態に係る高純度イソプロピルアルコールは、製造上、不可避的に混入する、その他の不純物を含んでいてもよい。不可避的に混入する不純物としては、水、有機不純物、無機不純物等が挙げられる。そのうち有機不純物は、イソプロピルアルコールを蒸留する工程で分離されず、混入する有機不純物である。
本実施形態に係る高純度イソプロピルアルコールは、水分量が0.1~100ppmであることが好ましい。イソプロピルアルコール中の水分は、洗浄及び乾燥後の残渣やウォーターマークの原因となると考えられ、また、触媒として作用する虞もある。そのため、水分量は100ppm以下であることが好ましい。一方、アセタール化合物が生成する反応は脱水反応のため、化学平衡を考慮すると、イソプロピルアルコール中に水分が存在している方がアセタール化合物の生成を抑制できるものと考えられる。そのため、水分量は0.1ppm以上であることが好ましい。高純度イソプロピルアルコールの洗浄液としての使用、及びアセタール化合物の生成抑制という点から、水分量は、1~50ppmであることがより好ましく、3~25ppmであることがさらに好ましい。
p=(アルデヒド化合物及びケトン化合物の全質量)/(水分量)・・・(I)
遊離酸は、アセタール化合物の生成に触媒として作用すると推定される。このため、本実施形態に係る高純度イソプロピルアルコール中の有機酸の濃度は、10ppm以下であることが好ましく、より好ましくは100ppb以下であり、さらに好ましくは10ppb以下である。下限値は低ければ低いほど好ましいが、工業的な製造、保管、及び輸送を考慮すると、通常は0.1ppb以上である。
本実施形態に係る高純度イソプロピルアルコールは、上述した性状が満足されるものが得られる限り、如何なる方法で製造されたものであってもよい。好適な製造方法としては、粗イソプロピルアルコールに対し、減圧蒸留により低沸分を留去することで、炭素数1~6のアルデヒド化合物の濃度が、質量基準で1500ppb以下に低減されるまで精製する減圧蒸留工程と、常圧蒸留により缶出液を除去することで、炭素数7~12のアセタール化合物の濃度が、質量基準で100ppb以下に低減されるまで精製する常圧蒸留工程とを組み合わせて施すものが挙げられる。
イソプロピルアルコール中に含まれるアセタール化合物は、GC-MSを使用し、以下に示した測定条件で測定した。
-測定条件-
装置:7890A/5975C(アジレント・テクノロジー株式会社製)
分析カラム:SUPELCO WAX-10(60m×0.25mm、0.25μm)
カラム温度:35℃(2分間保持)→5℃/分で昇温→100℃→10℃/分で昇温→240℃(6分間保持)
キャリアガス:ヘリウム
キャリアガス流量:2mL/分
注入口温度:240℃
試料注入法:パルスドスプリットレス法
注入時パルス圧:90psi(2分)
スプリットベント流量:50mL/分(2分)
ガスセーバー使用:20mL/分(5分)
トランスファーライン温度:240℃
イオン源、四重極温度:230℃、150℃
スキャンイオン:m/Z=25~250
上記の定性分析の方法に従って得られたチャートにピークが確認された場合は、そのピークのマススペクトルよりライブラリ検索を行い、構造を特定した。次に、その特定されたアセタール化合物の標準物質を準備し、予め定量された標準物質のピーク面積と比較することで、定性分析で検出されたアセタール化合物の濃度を選択イオン検出法(SIM)により定量した。
-SIMモニターイオン-
グループ1 開始時間:12.7分、m/Z:101,131,145(ドゥエル60)
イソプロピルアルコール中に含まれるアルデヒド化合物は、GC-MSを使用し、以下に示した測定条件で測定した。
-測定条件-
装置:7890A/5975C(アジレント・テクノロジー株式会社製)
分析カラム:SUPELCO WAX-10(60m×0.25mm、0.25μm)
カラム温度:35℃(2分間保持)→5℃/分で昇温→100℃→10℃/分で昇温→240℃(6分間保持)
キャリアガス:ヘリウム
キャリアガス流量:2mL/分
注入口温度:240℃
試料注入法:スプリット法
スプリット比:1対10
トランスファーライン温度:240℃
イオン源、四重極温度:230℃、150℃
スキャンイオン:m/Z=25~250
アセタール化合物の定量分析と同様に、上記の定性分析の方法に従って得られたチャートにピークが確認された場合は、そのピークのマススペクトルよりライブラリ検索を行い、構造を特定した。次に、その特定されたアルデヒド化合物の標準物質を準備し、予め定量された標準物質のピーク面積と比較することで、定性分析で検出されたアルデヒド化合物の濃度を選択イオン検出法(SIM)により定量した。
-SIMモニターイオン-
m/Z:29(アセトアルデヒド分析)
m/Z:58(アセトン、プロピオンアルデヒド分析)
m/Z:72(ブチルアルデヒド、メチルエチルケトン分析)
機器:カールフィッシャー水分計 AQ-7(平沼産業株式会社製)
方法:露点-80℃以下のグローボックス中で測定サンプル0.25g、脱水アセトニトリル0.75gを混合する。グローボックス中で充分乾燥したテルモシリンジ(商品名、2.5mL)で混合溶液0.5gを採取し、カールフィッシャー水分計にて測定した。
株式会社トクヤマの電子工業用イソプロピルアルコール(常圧蒸留により缶出液を除去する操作が施されている)を用意し、下記に示す蒸留操作を行った。
2Lのフラスコを水浴に入れ、長さ2mのガラスビーズの入った充填塔を設置した。フラスコに2Lのイソプロピルアルコールを入れた。5kPaに減圧し、水浴50℃、塔頂温度15~25℃、冷却器の温度-5~0℃で蒸留を行った。蒸留操作後、上述したアルデヒド化合物の測定方法に従って測定したところ、アルデヒド化合物として、アセトアルデヒド、プロピオンアルデヒド、及びブチルアルデヒドが検出された。アセトアルデヒド、プロピオンアルデヒド、及びブチルアルデヒドの合計の濃度は100ppb以下であった。アセトアルデヒド、プロピオンアルデヒド、及びブチルアルデヒドは、凝縮されず、系外に排出されたと考えられる。
蒸留により得られた、アセトアルデヒド、プロピオンアルデヒド、及びブチルアルデヒドの合計の濃度が100ppb以下であるサンプルを約20mLのSUS管に10mL入れ、窒素を100mL/minで30分間供給し、脱酸素を行った。脱酸素後、酸素が入らないように密閉した。120℃のオイルバスでSUS管を4時間加熱した。加速試験終了後、上述したアセタール化合物の測定方法に従って測定したところ、アセタール化合物の濃度は20ppbであった(表1)。
株式会社トクヤマの工業用イソプロピルアルコールを用意し、アセトアルデヒド、プロピオンアルデヒド、及びブチルアルデヒドを蒸留しなかった以外は、実施例1と同様の加速試験を行い、アセタール化合物の評価を行った。その結果、アセタール化合物の濃度は2000ppbに上昇していた(表1)。
(粗イソピロピルアルコールの製造)
原料のプロピレンとしては、不純物として39972ppmのプロパン、20ppmのエタン、8ppmのブテン、0.1ppm以下のペンテン、0.1ppm以下のヘキセンが含まれているものを準備した。また、原料の水としては、酸触媒であるリンタングステン酸を添加してpHを3.0に調整したものを準備した。10Lの内容積を持つ反応器に、110℃に加温した水を18.4kg/h(密度920kg/m3であるから、20L/h)の供給量で投入するとともに、プロピレンを1.2kg/hの供給量で投入した。
2Lのフラスコを水浴に入れ、長さ2mのガラスビーズの入った充填塔(段塔に換算した相当段数10段)を用意した。フラスコに、2Lの粗イソプロピルアルコールを入れた。減圧蒸留を、圧力:20kPa、還流比:3、水浴温度:70℃、塔頂温度:35~45℃、冷却器の温度:-5~0℃の条件で行い、低沸分を留去させた。次いで、上記と同様に、2Lのフラスコを水浴に入れ、長さ3mのガラスビーズの入った充填塔(段塔に換算した相当段数20段)を用意した。フラスコに、上記減圧蒸留により得られたイソプロピルアルコールを入れた。常圧蒸留を、還流比:3、オイルバス温度:120℃、塔頂温度:82℃、冷却器の温度:25℃の条件で行った。留出液のイソプロピルアルコールの濃度をGC/MSにより測定したところ、水を除いた濃度が99.999%以上の高純度であった。得られた高純度イソプロピルアルコールについて、アセタール化合物、アルデヒド化合物、及びケトン化合物の各濃度を測定した結果を表3~表5に示す。また、得られた高純度イソプロピルアルコールについて、水分量を測定した結果を表3に併せて示す。
上記により得られた高純度イソプロピルアルコールについて、実施例1と同様にして80℃の加熱温度での加速試験を行い、アセタール化合物の評価を行った。その結果、アセタール化合物の濃度は90ppbであった(表6)。これとは別に、高純度イソプロピルアルコールが収容されたSUS管を室温(25℃)下で6か月間保管し、アセタール化合物を測定したところ85ppbであった。このことから、80℃での加速試験が、室温(25℃)下、暗所に6か月間保管した際にイソプロピルアルコールが被るアセタール化合物の増加作用に対する過酷さにほぼ匹敵することが確認できた。
実施例2の(粗イソプロピルアルコールの精製)における減圧蒸留の条件を、圧力:10kPa、還流比:3、水浴温度:70℃、塔頂温度:28~38℃、冷却器の温度:-5~0℃に変更する以外は実施例2と同様にして、水を除いたイソプロピルアルコールの濃度が99.999%以上の高純度イソプロピルアルコールを製造した。得られた高純度イソプロピルアルコールについて、アセタール化合物、アルデヒド化合物、及びケトン化合物の各濃度を測定した結果を表3~表5に示す。また、得られた高純度イソプロピルアルコールについて、水分量を測定した結果を表3に併せて示す。
上記により得られた高純度イソプロピルアルコールについて、実施例1と同様にして80℃及び120℃の各温度条件で加速試験を行い、アセタール化合物の評価を行った。その結果、アセタール化合物の濃度は、80℃では40ppbであり(表6)、120℃では85ppbであった(表7)。
実施例2の(粗イソプロピルアルコールの精製)における減圧蒸留の条件を、圧力:5kPa、還流比:6、水浴温度:50℃、塔頂温度:15~25℃、冷却器の温度:-5~0℃に変更する以外は実施例2と同様にして、水を除いたイソプロピルアルコールの濃度が99.999質量%以上の高純度イソプロピルアルコールを製造した。得られた高純度イソプロピルアルコールについて、アセタール化合物、アルデヒド化合物、及びケトン化合物の各濃度を測定した結果を表3~表5に示す。また、得られた高純度イソプロピルアルコールについて、水分量を測定した結果を表3に併せて示す。
上記により得られた高純度イソプロピルアルコールについて、実施例1と同様にして80℃及び120℃の各温度条件で加速試験を行い、アセタール化合物の評価を行った。その結果、アセタール化合物の濃度は、80℃では19ppbであり(表6)、120℃では27ppbであった(表7)。
実施例2の(粗イソプロピルアルコールの精製)における減圧蒸留の条件を、圧力:5kPa、還流比:9、水浴温度:50℃、塔頂温度:15~25℃、冷却器の温度:-5~0℃に変更する以外は実施例2と同様にして、水を除いたイソプロピルアルコールの濃度が99.999質量%以上の高純度イソプロピルアルコールを製造した。得られた高純度イソプロピルアルコールについて、アセタール化合物、アルデヒド化合物、及びケトン化合物の各濃度を測定した結果を表3~表5に示す。また、得られた高純度イソプロピルアルコールについて、水分量を測定した結果を表3に併せて示す。
上記により得られた高純度イソプロピルアルコールについて、実施例1と同様にして80℃及び120℃の各温度条件で加速試験を行い、アセタール化合物の評価を行った。その結果、アセタール化合物の濃度は、80℃では11ppbであり(表6)、120℃では15ppbであった(表7)。
実施例2の(粗イソプロピルアルコールの精製)における常圧蒸留の条件を、段数:10段、還流比:1、オイルバス温度:120℃、塔頂温度:82℃、冷却器の温度:25℃に変更する以外は実施例2と同様にして、水を除いたイソプロピルアルコールの濃度が99.999質量%以上の高純度イソプロピルアルコールを製造した。得られた高純度イソプロピルアルコールについて、アセタール化合物、アルデヒド化合物、及びケトン化合物の各濃度を測定した結果を表3~表5に示す。また、得られた高純度イソプロピルアルコールについて、水分量を測定した結果を表3に併せて示す。
上記により得られた高純度イソプロピルアルコールについて、実施例1と同様にして80℃及び120℃の各温度条件で加速試験を行い、アセタール化合物の評価を行った。その結果、アセタール化合物の濃度は、80℃では89ppbであり(表6)、120℃では100ppbであった(表7)。
実施例2の(粗イソプロピルアルコールの精製)における減圧蒸留を、還流比:3、オイルバス温度:120℃、塔頂温度:82℃、冷却器の温度:25℃の条件の常圧蒸留に変更する以外は実施例2と同様にして、水を除いたイソプロピルアルコールの濃度が99.999質量%以上の高純度イソプロピルアルコールを製造した。得られた高純度イソプロピルアルコールについて、アセタール化合物、アルデヒド化合物、及びケトン化合物の各濃度を測定した結果を表3~表5に示す。また、得られた高純度イソプロピルアルコールについて、水分量を測定した結果を表3に併せて示す。
上記により得られた高純度イソプロピルアルコールについて、実施例1と同様にして80℃及び120℃の各温度条件で加速試験を行い、アセタール化合物の評価を行った。その結果、アセタール化合物の濃度は、80℃では270ppbであり(表6)、120℃では900ppbであった(表7)。
実施例2の(粗イソプロピルアルコールの精製)における常圧蒸留を、圧力:20kPa、段数:10段、還流比:3、水浴温度:70℃、塔頂温度:35~45℃、冷却器の温度:-5~0℃の条件の減圧蒸留に変更する以外は実施例2と同様にして、水を除いたイソプロピルアルコールの濃度が99.999質量%以上の高純度イソプロピルアルコールを製造した。得られた高純度イソプロピルアルコールについて、アセタール化合物、アルデヒド化合物、及びケトン化合物の各濃度を測定した結果を表3~表5に示す。また、得られた高純度イソプロピルアルコールについて、水分量を測定した結果を表3に併せて示す。
上記により得られた高純度イソプロピルアルコールについて、実施例1と同様にして80℃及び120℃の各温度条件で加速試験を行い、アセタール化合物の評価を行った。その結果、アセタール化合物の濃度は、80℃では200ppbであり(表6)、120℃では190ppbであった(表7)。
Claims (9)
- 炭素数7~12のアセタール化合物の濃度が、質量基準で100ppb以下であり、
窒素雰囲気下、80℃で4時間加熱する加速試験を行った場合に、前記アセタール化合物の濃度が、該加熱前の値に対して30倍以内の増加量であり、且つ、質量基準で100ppb以下の値に維持される高純度イソプロピルアルコール。 - 窒素雰囲気下、120℃で4時間加熱する加速試験を行った場合に、前記アセタール化合物の濃度が、該加熱前の値に対して30倍以内の増加量であり、且つ、質量基準で100ppb以下の値に維持される、請求項1に記載の高純度イソプロピルアルコール。
- 炭素数1~6のアルデヒド化合物の濃度が、質量基準で1500ppb以下である、請求項1又は2に記載の高純度イソプロピルアルコール。
- 炭素数3~6のケトン化合物の濃度が、質量基準で2000ppb以下である、請求項1~3のいずれか一項に記載の高純度イソプロピルアルコール。
- 水分量が、質量基準で0.1~100ppmである、請求項1~4のいずれか一項に記載の高純度イソプロピルアルコール。
- イソプロピルアルコールが、プロピレンの直接水和法により得られたものである、請求項1~5のいずれか一項に記載の高純度イソプロピルアルコール。
- 粗イソプロピルアルコールに対し、
減圧蒸留により低沸分を留去することで、炭素数1~6のアルデヒド化合物の濃度が、質量基準で1500ppb以下に低減されるまで精製する減圧蒸留工程と、
常圧蒸留により缶出液を除去することで、炭素数7~12のアセタール化合物の濃度が、質量基準で100ppb以下に低減されるまで精製する常圧蒸留工程と
を組み合わせて実施する、請求項1に記載の高純度イソプロピルアルコールの製造方法。 - 前記減圧蒸留工程において、炭素数3~6のケトン化合物の濃度が、質量基準で2000ppb以下に低減されるよう精製する、請求項7に記載の高純度イソプロピルアルコールの製造方法。
- 前記粗イソプロピルアルコールが、プロピレンの直接水和法により得られたものである、請求項7又は8に記載の高純度イソプロピルアルコールの製造方法。
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JP6810304B2 (ja) | 2021-01-06 |
US11905499B2 (en) | 2024-02-20 |
CN112771016A (zh) | 2021-05-07 |
JPWO2020071307A1 (ja) | 2021-02-15 |
TW202028165A (zh) | 2020-08-01 |
US20220002641A1 (en) | 2022-01-06 |
TWI825190B (zh) | 2023-12-11 |
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