KR950004038B1 - 불포화 카르복시산 및 그 에스테르의 제조방법 - Google Patents
불포화 카르복시산 및 그 에스테르의 제조방법 Download PDFInfo
- Publication number
- KR950004038B1 KR950004038B1 KR1019900000913A KR900000913A KR950004038B1 KR 950004038 B1 KR950004038 B1 KR 950004038B1 KR 1019900000913 A KR1019900000913 A KR 1019900000913A KR 900000913 A KR900000913 A KR 900000913A KR 950004038 B1 KR950004038 B1 KR 950004038B1
- Authority
- KR
- South Korea
- Prior art keywords
- carboxylic acid
- ester
- methyl
- acid ester
- unsaturated carboxylic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 150000002148 esters Chemical class 0.000 title claims description 18
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 150000001732 carboxylic acid derivatives Chemical class 0.000 title description 3
- 238000006243 chemical reaction Methods 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 22
- 239000002994 raw material Substances 0.000 claims description 19
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 13
- 150000007934 α,β-unsaturated carboxylic acids Chemical class 0.000 claims description 13
- 239000010457 zeolite Substances 0.000 claims description 8
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 7
- XYVQFUJDGOBPQI-UHFFFAOYSA-N Methyl-2-hydoxyisobutyric acid Chemical group COC(=O)C(C)(C)O XYVQFUJDGOBPQI-UHFFFAOYSA-N 0.000 claims description 6
- 229910021536 Zeolite Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- LPEKGGXMPWTOCB-UHFFFAOYSA-N 8beta-(2,3-epoxy-2-methylbutyryloxy)-14-acetoxytithifolin Natural products COC(=O)C(C)O LPEKGGXMPWTOCB-UHFFFAOYSA-N 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 125000003545 alkoxy group Chemical group 0.000 claims description 3
- ODQWQRRAPPTVAG-GZTJUZNOSA-N doxepin Chemical compound C1OC2=CC=CC=C2C(=C/CCN(C)C)/C2=CC=CC=C21 ODQWQRRAPPTVAG-GZTJUZNOSA-N 0.000 claims description 3
- 229940057867 methyl lactate Drugs 0.000 claims description 3
- 239000002808 molecular sieve Substances 0.000 claims description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical group [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 3
- -1 ester compound Chemical class 0.000 claims description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 18
- 239000003054 catalyst Substances 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 6
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Natural products CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 5
- 239000003085 diluting agent Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- BHIWKHZACMWKOJ-UHFFFAOYSA-N isobutyric acid methyl ester Natural products COC(=O)C(C)C BHIWKHZACMWKOJ-UHFFFAOYSA-N 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- NGEWQZIDQIYUNV-UHFFFAOYSA-N L-valinic acid Natural products CC(C)C(O)C(O)=O NGEWQZIDQIYUNV-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- WDAXFOBOLVPGLV-UHFFFAOYSA-N isobutyric acid ethyl ester Natural products CCOC(=O)C(C)C WDAXFOBOLVPGLV-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- AKWHOGIYEOZALP-UHFFFAOYSA-N methyl 2-methoxy-2-methylpropanoate Chemical compound COC(=O)C(C)(C)OC AKWHOGIYEOZALP-UHFFFAOYSA-N 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- MWFMGBPGAXYFAR-UHFFFAOYSA-N 2-hydroxy-2-methylpropanenitrile Chemical compound CC(C)(O)C#N MWFMGBPGAXYFAR-UHFFFAOYSA-N 0.000 description 1
- BWLBGMIXKSTLSX-UHFFFAOYSA-N 2-hydroxyisobutyric acid Chemical compound CC(C)(O)C(O)=O BWLBGMIXKSTLSX-UHFFFAOYSA-N 0.000 description 1
- BKBZFJRHYSCZQA-UHFFFAOYSA-N 2-methoxy-2-methylpropanoic acid Chemical compound COC(C)(C)C(O)=O BKBZFJRHYSCZQA-UHFFFAOYSA-N 0.000 description 1
- JIRULJUIQOAJPM-UHFFFAOYSA-N 3-methoxy-2-methylpropanoic acid Chemical compound COCC(C)C(O)=O JIRULJUIQOAJPM-UHFFFAOYSA-N 0.000 description 1
- 229910017090 AlO 2 Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- JGFBQFKZKSSODQ-UHFFFAOYSA-N Isothiocyanatocyclopropane Chemical compound S=C=NC1CC1 JGFBQFKZKSSODQ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- PWLNAUNEAKQYLH-UHFFFAOYSA-N butyric acid octyl ester Natural products CCCCCCCCOC(=O)CCC PWLNAUNEAKQYLH-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 150000001733 carboxylic acid esters Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- DDMCDMDOHABRHD-UHFFFAOYSA-N methyl 2-hydroxybutanoate Chemical compound CCC(O)C(=O)OC DDMCDMDOHABRHD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- UUIQMZJEGPQKFD-UHFFFAOYSA-N n-butyric acid methyl ester Natural products CCCC(=O)OC UUIQMZJEGPQKFD-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C57/00—Unsaturated compounds having carboxyl groups bound to acyclic carbon atoms
- C07C57/02—Unsaturated compounds having carboxyl groups bound to acyclic carbon atoms with only carbon-to-carbon double bonds as unsaturation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
- C07C51/377—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
- C07C67/317—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups
- C07C67/327—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups by elimination of functional groups containing oxygen only in singly bound form
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Description
Claims (8)
- α-하이드록시 카르복시산 에스테르,α-알콕시 카르복시산 에스테르 및 β-알콕시 카르복시산 에스테르 가운데 1종 이상의 에스테르를 원료로하여, 기체상 접촉반응에 의해 α,β-불포화 카르복시산 및 그 에스테르화합물을 제조하는데 있어, 촉매로서 결정성 알루미노 규산염을 사용하는 것을 특징으로 하는 α,β-불포화 카르복시산 및 그 에스테르의 제조방법.
- 제1항에 있어서, 결정성 알루미노 규산염이 X형 제올라이트인 제조방법.
- 제1항에 있어서, 결정성 알루미노 규산염이 Y형 제올라이트인 제조방법.
- 제1항에 있어서,α-하이드록시 카르복시산 에스테르가 α-하이드록시 이소부티르산 메틸 또는, 락트산메틸인 제조방법.
- 제1항에 있어서, α- 또는, β-알콕시 카르복시산 에스테르가 α- 또는 β-메톡시 이소부티르산 메틸 또는, α- 또는, β-메톡시 프로피온산 메틸인 제조방법.
- 제1항에 있어서, 원료인 에스테르를 물로 희석하는 제조방법.
- 제1항에 있어서, 원료인 에스테르를 에스테르의 알콕시 부분에 상당하는 알코올로 희석하는 제조방법.
- 제2항에 있어서, X형 제올라이트가 몰레큘라 시이브(Molecular Sieve) 13X인 제조방법.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1015110A JP2727618B2 (ja) | 1989-01-26 | 1989-01-26 | 不飽和カルボン酸エステルの製造方法 |
JP15110/1989 | 1989-01-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR900011702A KR900011702A (ko) | 1990-08-01 |
KR950004038B1 true KR950004038B1 (ko) | 1995-04-22 |
Family
ID=11879692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019900000913A Expired - Lifetime KR950004038B1 (ko) | 1989-01-26 | 1990-01-24 | 불포화 카르복시산 및 그 에스테르의 제조방법 |
Country Status (6)
Country | Link |
---|---|
US (1) | US5250729A (ko) |
EP (1) | EP0379691B2 (ko) |
JP (1) | JP2727618B2 (ko) |
KR (1) | KR950004038B1 (ko) |
DE (1) | DE68913714T3 (ko) |
ES (1) | ES2052875T5 (ko) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2727618B2 (ja) † | 1989-01-26 | 1998-03-11 | 三菱瓦斯化学株式会社 | 不飽和カルボン酸エステルの製造方法 |
JP2884639B2 (ja) * | 1989-11-28 | 1999-04-19 | 三菱瓦斯化学株式会社 | 不飽和カルボン酸エステルの製造法 |
JP2906547B2 (ja) * | 1990-03-15 | 1999-06-21 | 三菱瓦斯化学株式会社 | α,β―不飽和カルボン酸エステルの製造方法 |
JP3189858B2 (ja) * | 1992-11-16 | 2001-07-16 | 三菱瓦斯化学株式会社 | メタクリル酸メチルの製造法 |
US5393918A (en) * | 1993-12-02 | 1995-02-28 | Rohm And Haas Company | High yield process for the production of methacrylic acid esters |
JP3520878B2 (ja) * | 1995-01-10 | 2004-04-19 | 三菱瓦斯化学株式会社 | メタクリル酸メチルの製造方法 |
EP1186592A1 (en) * | 2000-09-11 | 2002-03-13 | Mitsubishi Gas Chemical Company, Ltd. | Production of methacrylates |
US6545175B1 (en) | 2000-10-19 | 2003-04-08 | Battelle Memorial Institute | Ester compounds and their use in forming acrylates |
US6992209B2 (en) * | 2002-12-09 | 2006-01-31 | Battelle Memorial Institute | Methods of forming alpha, beta-unsaturated acids and esters |
WO2005095320A1 (en) * | 2004-04-02 | 2005-10-13 | Ciba Specialty Chemicals Water Treatments Limited | Preparation of acrylic acid derivatives from alpha or beta-hydroxy carboxylic acids |
US20070219397A1 (en) * | 2006-03-15 | 2007-09-20 | Battelle Memorial Institute | Method for conversion of beta-hydroxy carbonyl compounds |
US7687661B2 (en) * | 2006-03-15 | 2010-03-30 | Battelle Memorial Institute | Method for conversion of β-hydroxy carbonyl compounds |
CN103221380B (zh) | 2010-10-07 | 2015-04-29 | 罗门哈斯公司 | 生产甲基丙烯酸酯的方法 |
JP5654615B2 (ja) | 2010-12-28 | 2015-01-14 | 株式会社日本触媒 | アクリル酸および/またはそのエステルおよびその重合体の製法 |
WO2013184345A1 (en) | 2012-06-04 | 2013-12-12 | Rohm And Haas Company | Process for production of methacrylic acid esters |
US20160102043A1 (en) | 2013-06-26 | 2016-04-14 | Rohm And Haas Company | Process for production of methacrylic acid esters |
US9630904B2 (en) | 2013-12-24 | 2017-04-25 | Mitsubishi Gas Chemical Company, Inc. | Catalyst for use in production of methyl methacrylate, and method for producing methyl methacrylate |
CN106163660B (zh) | 2014-04-10 | 2018-12-14 | 三菱瓦斯化学株式会社 | 用于制造甲基丙烯酸甲酯的催化剂成型体以及使用其的甲基丙烯酸甲酯的制造方法 |
WO2016026763A1 (en) | 2014-08-18 | 2016-02-25 | Basf Se | Process for preparing acrylic acid using a heterogeneous alumina catalyst |
JP2021503444A (ja) | 2017-11-17 | 2021-02-12 | ピュラック バイオケム ビー. ブイ. | 乳酸メチルからアクリル酸メチルを製造する方法 |
US20230174734A1 (en) | 2020-04-03 | 2023-06-08 | Nouryon Chemicals International B.V. | Thermally expandable microspheres prepared from bio-based monomers |
WO2021198487A1 (en) | 2020-04-03 | 2021-10-07 | Nouryon Chemicals International B.V. | Thermally expandable microspheres prepared from bio-based monomers |
KR102448165B1 (ko) | 2020-10-21 | 2022-09-28 | 한국화학연구원 | 활성 및 안정성이 향상된 젖산 탈수 반응용 촉매, 이의 제조방법 및 이를 적용한 아크릴산 제조방법 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB539163A (en) † | 1940-03-08 | 1941-08-29 | Distillers Co Yeast Ltd | Improvements in or relating to the production of halogenated organic compounds |
GB584607A (en) * | 1943-04-15 | 1947-01-20 | Charles Weizmann | Process for the preparation of methacrylic acid and its esters |
FR1080212A (fr) † | 1952-07-01 | 1954-12-07 | Ru Tgerswerke Ag | Procédé pour la fabrication d'éthers de l'acide acrylique |
US3657331A (en) * | 1969-06-10 | 1972-04-18 | Sir Soc Italiana Resine Spa | Process for preparing acrylic or methacrylic acid |
DE2411440B2 (de) * | 1974-03-11 | 1977-12-15 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung von methacrylsaeure und butyrolacton |
JPS57149239A (en) * | 1981-03-13 | 1982-09-14 | Mitsubishi Gas Chem Co Inc | Preparation of methacrylic acid |
AU559322B2 (en) * | 1982-09-07 | 1987-03-05 | British Petroleum Company Plc, The | Preparation of theta-1 aluminosilicate and use as a catalyst |
US4613684A (en) † | 1983-10-06 | 1986-09-23 | Mitsubishi Gas Chemical Company, Inc. | Process for the preparation of carboxylic acid esters |
JPS6078939A (ja) * | 1983-10-06 | 1985-05-04 | Mitsubishi Gas Chem Co Inc | メタアクリル酸メチルの製造法 |
JPS60184047A (ja) * | 1984-02-13 | 1985-09-19 | イー・アイ・デユポン・ド・ネモアース・アンド・コンパニー | メタクリル酸エステルの製造方法 |
JPS6172727A (ja) * | 1984-09-17 | 1986-04-14 | Nippon Sheet Glass Co Ltd | スチレンの製造方法 |
JP2727618B2 (ja) † | 1989-01-26 | 1998-03-11 | 三菱瓦斯化学株式会社 | 不飽和カルボン酸エステルの製造方法 |
-
1989
- 1989-01-26 JP JP1015110A patent/JP2727618B2/ja not_active Expired - Lifetime
- 1989-12-04 US US07/445,543 patent/US5250729A/en not_active Expired - Lifetime
- 1989-12-13 EP EP89122983A patent/EP0379691B2/en not_active Expired - Lifetime
- 1989-12-13 ES ES89122983T patent/ES2052875T5/es not_active Expired - Lifetime
- 1989-12-13 DE DE68913714T patent/DE68913714T3/de not_active Expired - Lifetime
-
1990
- 1990-01-24 KR KR1019900000913A patent/KR950004038B1/ko not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2727618B2 (ja) | 1998-03-11 |
DE68913714D1 (de) | 1994-04-14 |
KR900011702A (ko) | 1990-08-01 |
DE68913714T3 (de) | 2001-04-19 |
ES2052875T3 (es) | 1994-07-16 |
EP0379691B1 (en) | 1994-03-09 |
JPH02196753A (ja) | 1990-08-03 |
EP0379691B2 (en) | 2001-01-03 |
EP0379691A1 (en) | 1990-08-01 |
DE68913714T2 (de) | 1994-06-23 |
ES2052875T5 (es) | 2001-06-16 |
US5250729A (en) | 1993-10-05 |
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