DE2401553C2 - Verfahren zur Herstellung von Butandiol-1,4 - Google Patents
Verfahren zur Herstellung von Butandiol-1,4Info
- Publication number
- DE2401553C2 DE2401553C2 DE2401553A DE2401553A DE2401553C2 DE 2401553 C2 DE2401553 C2 DE 2401553C2 DE 2401553 A DE2401553 A DE 2401553A DE 2401553 A DE2401553 A DE 2401553A DE 2401553 C2 DE2401553 C2 DE 2401553C2
- Authority
- DE
- Germany
- Prior art keywords
- butanediol
- reaction
- carried out
- hydrogenation
- hydroformylation
- 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
Links
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 title claims description 28
- 238000000034 method Methods 0.000 title claims description 14
- 238000002360 preparation method Methods 0.000 title claims description 3
- 239000003054 catalyst Substances 0.000 claims description 20
- HGINCPLSRVDWNT-UHFFFAOYSA-N Acrolein Chemical compound C=CC=O HGINCPLSRVDWNT-UHFFFAOYSA-N 0.000 claims description 17
- 238000007037 hydroformylation reaction Methods 0.000 claims description 17
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 claims description 12
- 238000005984 hydrogenation reaction Methods 0.000 claims description 12
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 claims description 10
- 229910052703 rhodium Inorganic materials 0.000 claims description 10
- 239000010948 rhodium Substances 0.000 claims description 10
- -1 cyclic acetal Chemical class 0.000 claims description 9
- 229910017052 cobalt Inorganic materials 0.000 claims description 8
- 239000010941 cobalt Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 6
- 229910000073 phosphorus hydride Inorganic materials 0.000 claims description 6
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 5
- 150000003003 phosphines Chemical class 0.000 claims description 4
- 239000011541 reaction mixture Substances 0.000 claims description 4
- 239000003607 modifier Substances 0.000 claims 1
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- 150000001241 acetals Chemical class 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 150000002009 diols Chemical class 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 238000004821 distillation Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- MCIPQLOKVXSHTD-UHFFFAOYSA-N 3,3-diethoxyprop-1-ene Chemical compound CCOC(C=C)OCC MCIPQLOKVXSHTD-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 150000001299 aldehydes Chemical class 0.000 description 3
- MQIKJSYMMJWAMP-UHFFFAOYSA-N dicobalt octacarbonyl Chemical group [Co+2].[Co+2].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-] MQIKJSYMMJWAMP-UHFFFAOYSA-N 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 239000007868 Raney catalyst Substances 0.000 description 2
- 229910000564 Raney nickel Inorganic materials 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 description 1
- PYJNQBGAHPDPMH-UHFFFAOYSA-N 11-dimethylphosphanylundecanoic acid Chemical compound CP(C)CCCCCCCCCCC(O)=O PYJNQBGAHPDPMH-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- ZNZYKNKBJPZETN-WELNAUFTSA-N Dialdehyde 11678 Chemical compound N1C2=CC=CC=C2C2=C1[C@H](C[C@H](/C(=C/O)C(=O)OC)[C@@H](C=C)C=O)NCC2 ZNZYKNKBJPZETN-WELNAUFTSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- NPKGQBIUYHHPOT-UHFFFAOYSA-N [Cu+2].[C-]#[C-] Chemical compound [Cu+2].[C-]#[C-] NPKGQBIUYHHPOT-UHFFFAOYSA-N 0.000 description 1
- 125000004036 acetal group Chemical group 0.000 description 1
- 238000006359 acetalization reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 150000005840 aryl radicals Chemical class 0.000 description 1
- ADGFUTSPEKVFKD-UHFFFAOYSA-N carbonyl dichloride;rhodium Chemical class [Rh].ClC(Cl)=O ADGFUTSPEKVFKD-UHFFFAOYSA-N 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 150000001868 cobalt Chemical class 0.000 description 1
- JGDFBJMWFLXCLJ-UHFFFAOYSA-N copper chromite Chemical compound [Cu]=O.[Cu]=O.O=[Cr]O[Cr]=O JGDFBJMWFLXCLJ-UHFFFAOYSA-N 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- HASCQPSFPAKVEK-UHFFFAOYSA-N dimethyl(phenyl)phosphine Chemical compound CP(C)C1=CC=CC=C1 HASCQPSFPAKVEK-UHFFFAOYSA-N 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- CHKZZJRBULVTRO-UHFFFAOYSA-N dodecyl(diethyl)phosphane Chemical compound CCCCCCCCCCCCP(CC)CC CHKZZJRBULVTRO-UHFFFAOYSA-N 0.000 description 1
- OXTKXGVJXOBALA-UHFFFAOYSA-N ethyl-bis(2-methylphenyl)phosphane Chemical compound C=1C=CC=C(C)C=1P(CC)C1=CC=CC=C1C OXTKXGVJXOBALA-UHFFFAOYSA-N 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- YWHMLAUWKRWALB-UHFFFAOYSA-N icosyl(dimethyl)phosphane Chemical compound CCCCCCCCCCCCCCCCCCCCP(C)C YWHMLAUWKRWALB-UHFFFAOYSA-N 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 229940100573 methylpropanediol Drugs 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- GRAKJTASWCEOQI-UHFFFAOYSA-N tridodecylphosphane Chemical compound CCCCCCCCCCCCP(CCCCCCCCCCCC)CCCCCCCCCCCC GRAKJTASWCEOQI-UHFFFAOYSA-N 0.000 description 1
- RMZAYIKUYWXQPB-UHFFFAOYSA-N trioctylphosphane Chemical compound CCCCCCCCP(CCCCCCCC)CCCCCCCC RMZAYIKUYWXQPB-UHFFFAOYSA-N 0.000 description 1
- COIOYMYWGDAQPM-UHFFFAOYSA-N tris(2-methylphenyl)phosphane Chemical compound CC1=CC=CC=C1P(C=1C(=CC=CC=1)C)C1=CC=CC=C1C COIOYMYWGDAQPM-UHFFFAOYSA-N 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- 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
- C07C29/132—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group
- C07C29/136—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH
- C07C29/14—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH of a —CHO group
- C07C29/141—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH of a —CHO group with hydrogen or hydrogen-containing gases
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2401553A DE2401553C2 (de) | 1974-01-14 | 1974-01-14 | Verfahren zur Herstellung von Butandiol-1,4 |
| IT30977/74A IT1028017B (it) | 1974-01-14 | 1974-12-23 | Processo per la produzione di butan 1.4 diolo |
| US05/537,118 US4017550A (en) | 1974-01-14 | 1974-12-30 | Manufacture of 1,4-butanediol |
| CA217,225A CA1052394A (en) | 1974-01-14 | 1974-12-31 | Manufacture of 1,4-butanediol |
| JP50005055A JPS50106909A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1974-01-14 | 1975-01-10 | |
| GB1316/75A GB1484778A (en) | 1974-01-14 | 1975-01-13 | Manufacture of 1,4-butanediol and of 3-formylpropion-aldehyde-acetals serving as intermediates therein |
| FR7500836A FR2257557B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1974-01-14 | 1975-01-13 | |
| BE152352A BE824356A (fr) | 1974-01-14 | 1975-01-14 | Procede de preparation du 1,4-butanediol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2401553A DE2401553C2 (de) | 1974-01-14 | 1974-01-14 | Verfahren zur Herstellung von Butandiol-1,4 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2401553A1 DE2401553A1 (de) | 1975-07-17 |
| DE2401553C2 true DE2401553C2 (de) | 1984-05-03 |
Family
ID=5904738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2401553A Expired DE2401553C2 (de) | 1974-01-14 | 1974-01-14 | Verfahren zur Herstellung von Butandiol-1,4 |
Country Status (8)
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3963755A (en) * | 1974-07-31 | 1976-06-15 | E. I. Du Pont De Nemours And Company | Mixture of 2(2'-propanal)-5-methyl-1,3-dioxane and 2(3'-propanal)-5-methyl-1,3-dioxane |
| US3963754A (en) * | 1974-07-31 | 1976-06-15 | E. I. Du Pont De Nemours And Company | 2-Vinyl-5-methyl-1,3-dioxane |
| US3929915A (en) * | 1974-07-31 | 1975-12-30 | Du Pont | Process for the production of butanediol |
| US4079064A (en) * | 1975-10-14 | 1978-03-14 | Celanese Corporation | Production of (1,3-dioxane)propionaldehyde derivatives |
| US4096192A (en) * | 1976-03-30 | 1978-06-20 | E. I. Du Pont De Nemours And Company | Process for the preparation of 2-methyl-1,3-propanediol |
| GB1581379A (en) * | 1976-12-28 | 1980-12-10 | Du Pont | Preparation of diols by hydrogenation and hyrdrolysis of cyclic acetals |
| US4161616A (en) * | 1978-04-24 | 1979-07-17 | Celanese Corporation | Acrolein conversion to butanediol |
| US4593141A (en) * | 1979-02-12 | 1986-06-03 | Exxon Research And Engineering Co. | Hydroformylation catalysis by branched alkyl diaryl phosphine rhodium complexes |
| JPS55151521A (en) * | 1979-05-15 | 1980-11-26 | Toyo Soda Mfg Co Ltd | Preparation of alcohol |
| US4687874A (en) * | 1980-02-12 | 1987-08-18 | Exxon Research And Engineering Company | Selective hydroformylation process using alkyl diaryl phosphine rhodium carbonyl hydride catalysts |
| US4374999A (en) * | 1981-01-02 | 1983-02-22 | The Dow Chemical Company | Internal hydroformylation of acrolein acetals |
| US5922921A (en) * | 1997-10-27 | 1999-07-13 | Celanese International Corporation | Process for the production of n-butanol |
| JP4096511B2 (ja) * | 2000-12-18 | 2008-06-04 | 三菱化学株式会社 | 多価アルコール類の製造方法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB702206A (en) * | 1950-03-31 | 1954-01-13 | Anglo Iranian Oil Co Ltd | Improvements in or relating to the production of dialdehydes and derivatives thereof |
| US2888492A (en) * | 1955-08-08 | 1959-05-26 | Shell Dev | Production of polyols |
| US3239566A (en) * | 1960-07-22 | 1966-03-08 | Shell Oil Co | Hydroformylation of olefins |
| US3448157A (en) * | 1965-09-27 | 1969-06-03 | Shell Oil Co | Hydroformylation of olefins |
| FR1559112A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1968-01-25 | 1969-03-07 | ||
| DE2111116A1 (de) * | 1971-03-09 | 1972-09-14 | Basf Ag | Verfahren zur Herstellung von Formylpropionaldehydacetalen |
| US3929915A (en) * | 1974-07-31 | 1975-12-30 | Du Pont | Process for the production of butanediol |
-
1974
- 1974-01-14 DE DE2401553A patent/DE2401553C2/de not_active Expired
- 1974-12-23 IT IT30977/74A patent/IT1028017B/it active
- 1974-12-30 US US05/537,118 patent/US4017550A/en not_active Expired - Lifetime
- 1974-12-31 CA CA217,225A patent/CA1052394A/en not_active Expired
-
1975
- 1975-01-10 JP JP50005055A patent/JPS50106909A/ja active Pending
- 1975-01-13 GB GB1316/75A patent/GB1484778A/en not_active Expired
- 1975-01-13 FR FR7500836A patent/FR2257557B1/fr not_active Expired
- 1975-01-14 BE BE152352A patent/BE824356A/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| US4017550A (en) | 1977-04-12 |
| DE2401553A1 (de) | 1975-07-17 |
| FR2257557B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1978-02-03 |
| IT1028017B (it) | 1979-01-30 |
| FR2257557A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1975-08-08 |
| CA1052394A (en) | 1979-04-10 |
| BE824356A (fr) | 1975-07-14 |
| JPS50106909A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1975-08-22 |
| GB1484778A (en) | 1977-09-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OD | Request for examination | ||
| Q176 | The application caused the suspense of an application |
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| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition |