EP1155166A1 - Verfahren zur herstellung von 2,2,3,3-tetramethoxypropanol - Google Patents
Verfahren zur herstellung von 2,2,3,3-tetramethoxypropanolInfo
- Publication number
- EP1155166A1 EP1155166A1 EP00902640A EP00902640A EP1155166A1 EP 1155166 A1 EP1155166 A1 EP 1155166A1 EP 00902640 A EP00902640 A EP 00902640A EP 00902640 A EP00902640 A EP 00902640A EP 1155166 A1 EP1155166 A1 EP 1155166A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- steel
- methanol
- tetramethoxypropyl
- alcohol
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B3/00—Electrolytic production of organic compounds
- C25B3/20—Processes
- C25B3/23—Oxidation
Definitions
- the present invention relates to a process for the preparation of 2, 2, 3, 3 -tetramethoxypropanol by electrochemical oxidation of methylglyoxaldimethylacetal using a mixture containing methanol and water as the electrolysis medium and a cathode made of iron, steel, platinum or zinc.
- the invention was therefore based on the object of providing a process which enables the preparation of 2, 2, 3, 3 tetramethoxypropanol with high selectivity, conversion and yield.
- the electrolysis liquid contains water, preferably in amounts of 0.1 to 5% by weight.
- auxiliary electrolyte is added to ensure that the electrolysis liquid has sufficient conductivity.
- Suitable auxiliary electrolytes are preferably halogen-containing compounds, for example elemental halogen, alkyl halides, hydrogen halides and preferably salts of the halides, particularly preferably iodides and bromides.
- the salts of the halides are especially ammonium halides, e.g. Ammonium bromide or ammonium iodide or tetrabutylammonium iodide or metal halides, preferably alkali metal halides such as sodium bromide, sodium iodide, potassium iodide or potassium bromide are preferred.
- the electrolysis liquid preferably has the following composition:
- methylglyoxaldimethylacetal 50 to 98.8 preferably 70 to 95% by weight of methanol 0.1 to 5, preferably 0.5 to 3% by weight of an auxiliary electrolyte and
- the reaction according to the invention is preferably carried out at current densities of 0.5 to 25 A / dm 2 and at temperatures from -20 to 60 ° C., preferably 0 to 40 ° C.
- pressure is generally not critical. In general, the process is carried out at pressures of 0.1 to 10 bar, preferably at normal pressure. High pressures are particularly suitable at high reaction temperatures.
- Suitable anode materials are, for example, noble metals such as platinum or oxides such as ruthenium and chromium oxide or RuO x Ti x mixed oxides and preferably graphite.
- iron, steel, platinum or zinc 20 are used as cathodes.
- the steel can be both unalloyed steel and higher-alloy steel with additives such as chrome, manganese, boron or stainless steel.
- the term iron is not only elemental iron but the well-known types of iron, which are more or less Si, Mn, 25 S, P as further alloy components and also additions of Al, Cr, Mn, Mo, Ni, Ta, Ti, Vn, Contain Si, Co, and other common alloy components.
- V is particularly preferably 2 A-, VA steel.
- the method according to the invention can be carried out in the generally customary electrolysis cells, for example in undivided flow cells, e.g. undivided plate frame - cells -.
- the electrolysis is stopped when a conversion 35 of approximately 100% is reached.
- the electrolysis liquid is worked up by the methods generally used in organic chemistry, for example by distillation.
- Undivided plate-frame cell 6 mm electrode spacing anode Sigraflex cathode: steel of type 1.4301 total electrode area: 2.56 dm 2
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19904929A DE19904929A1 (de) | 1999-02-06 | 1999-02-06 | Verfahren zur Herstellung von 2,2,3,3-Tetramethoxypropanol |
DE19904929 | 1999-02-06 | ||
PCT/EP2000/000698 WO2000046424A1 (de) | 1999-02-06 | 2000-01-29 | Verfahren zur herstellung von 2,2,3,3-tetramethoxypropanol |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1155166A1 true EP1155166A1 (de) | 2001-11-21 |
Family
ID=7896690
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00902640A Withdrawn EP1155166A1 (de) | 1999-02-06 | 2000-01-29 | Verfahren zur herstellung von 2,2,3,3-tetramethoxypropanol |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1155166A1 (ja) |
JP (1) | JP2002536546A (ja) |
DE (1) | DE19904929A1 (ja) |
WO (1) | WO2000046424A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10254709A1 (de) * | 2002-11-23 | 2004-06-09 | Reinhold Denz | Elektrolyse-Vorrichtung |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE59105416D1 (de) * | 1990-05-31 | 1995-06-14 | Basf Ag | Verfahren zur Herstellung von alpha-Hydroxymethyl-ketalen. |
-
1999
- 1999-02-06 DE DE19904929A patent/DE19904929A1/de not_active Withdrawn
-
2000
- 2000-01-29 EP EP00902640A patent/EP1155166A1/de not_active Withdrawn
- 2000-01-29 JP JP2000597481A patent/JP2002536546A/ja not_active Withdrawn
- 2000-01-29 WO PCT/EP2000/000698 patent/WO2000046424A1/de not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO0046424A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE19904929A1 (de) | 2000-08-10 |
WO2000046424A1 (de) | 2000-08-10 |
JP2002536546A (ja) | 2002-10-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20010719 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Withdrawal date: 20011221 |