WO2012089518A1 - Verfahren zur herstellung von methylmercaptopropionaldehyd - Google Patents
Verfahren zur herstellung von methylmercaptopropionaldehyd Download PDFInfo
- Publication number
- WO2012089518A1 WO2012089518A1 PCT/EP2011/072868 EP2011072868W WO2012089518A1 WO 2012089518 A1 WO2012089518 A1 WO 2012089518A1 EP 2011072868 W EP2011072868 W EP 2011072868W WO 2012089518 A1 WO2012089518 A1 WO 2012089518A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mixture
- methylmercaptan
- mol
- methylmercaptopropionaldehyde
- acrolein
- 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.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C319/00—Preparation of thiols, sulfides, hydropolysulfides or polysulfides
- C07C319/14—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides
- C07C319/16—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides by addition of hydrogen sulfide or its salts to unsaturated compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C319/00—Preparation of thiols, sulfides, hydropolysulfides or polysulfides
- C07C319/14—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides
- C07C319/20—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides by reactions not involving the formation of sulfide groups
Definitions
- the invention relates to a process for the preparation of
- Methylmercaptan (MC).
- the present invention relates, in particular, to a process for the preparation of methylmercaptopropionaldehyde from gaseous acrolein and methylmercaptan, which comprises simultaneously (a) gaseous acrolein from a mixture containing at least one compound selected from the group consisting of the hemithioacetal of
- Methylmercaptopropionaldehyds, methylmercaptopropionaldehyde and methylmercaptan is absorbed, (b) in this mixture acrolein with methylmercaptan and / or the
- MMP formation from methylmercaptan and an acrolein-containing gas mixture is known in the art.
- Reaction mixture preferably 0, 1 to 0.2% Hemithioacetal adjusted.
- WO 9429254 describes the continuous production of MMP from an acrolein-containing gas mixture and MC in a "gas / liquid" reaction zone, in which non-condensable gases are additionally separated from the AC process
- Hemithioacetal formation is avoided by the equimolar addition of MC and AC, preferably monitored by periodic gas chromatography.
- the MMP formation speed can be increased by a factor of 3 to 10.
- the limitation of the AC mass transfer is kept small by turbulent conditions in the reaction system.
- Dimethyl sulfide and dimethyl disulfide either in the MMP product or in the MMP exhaust are present (WO 9429254 and US 4319047).
- the synthesis of MC is usually carried out in the gas phase at temperatures between 300 and 500 ° C and at pressures between 1 and 25 bara. A method is described, for example, in EP 850922.
- the product mixture of the synthesis contains the desired MC in addition to the resulting reaction
- Entrainment means such as e.g. Nitrogen, to be separated.
- the method is not described for the use of gases containing AC.
- reaction temperatures in the MMP synthesis can be controlled by dividing the exotherm of hemithioacetal formation as an intermediate and, after the subsequent addition of liquid AC, the MMP reaction enthalpy of the MMP reaction into 2 zones.
- the method is also not described for the use of gases containing AC.
- This object is achieved by a method for the production of
- Methylmercaptopropionaldehyde from gaseous acrolein and methylmercaptan which is characterized in that in one process step simultaneously (a) gaseous acrolein from a mixture at least containing a compound selected from the group consisting of the hemithioacetal of methylmercaptopropionaldehyde,
- Methylmercaptopropionaldehyds is converted to methylmercaptopropionaldehyde and (c) impurities and by-products are removed from this mixture.
- acrolein with methylmercaptan and / or hemithioacetal it can be assumed that hemithioacetal does not react directly with acrolein, but first breaks down into acrolein and methylmercaptan (equilibrium) and thus released
- Methylmercaptan then reacted with acrolein to MMP.
- the process step is carried out in a reactive absorber.
- the reactive absorber is characterized in that in only one container or in only one stage gaseous AC is absorbed in a mixture of mainly MMP, MC and hemithioacetal, AC reacts directly or via the intermediate hemithioacetal with MC to MMP and low-boiling secondary components (including dimethyl sulfide,
- Acetaldehyde, water and dimethyl disulfide are stripped, whereby the exhaust gas losses of reactants and target product are minimized.
- the removed impurities are identical to the removed impurities.
- Embodiment water is not additionally obtained from the
- MMP is produced from the chemical reaction between AC and MC.
- the AC required for this reaction arises from the partial oxidation of propylene in a gas-phase reaction in a shell-and-tube reactor.
- the gas containing AC in the quench column is replaced by excess water, undesirable by-products, e.g. Acetic acid, formaldehyde, allyl alcohol, and mainly acrylic acid, freed.
- undesirable by-products e.g. Acetic acid, formaldehyde, allyl alcohol, and mainly acrylic acid, freed.
- acetaldehyde is deposited at this point.
- AC is absorbed from the gas phase in a mixture of MMP and hemithioacetal and reacts in the same container with MC or
- the MC required for the reaction is continuously metered in liquid or gaseous form into an MMP feed to the reactive absorber.
- the present invention is a considerable simplification to the above-described prior art, since the reactive absorber used additionally acts as a stripping column and thus in addition to the low-boiling substances from the gas containing AC also low-boiling minor components from the reaction between hydrogen sulfide and methanol, such as dimethyl sulfide , disconnects.
- MC with low purity (MC> 87% by weight, dimethyl sulfide 1, 5-5% by weight, dimethyl disulfide 0.2-1% by weight, dimethyl ether 0-3% by weight, Water - 0 - 2 wt .-% and methanol - 0 - 2 wt .-%) can be used and thus a complex purification, such as in EP 0850923 and DE 1768826 described, can be omitted.
- the methyl mercaptan used is 1, 5 - 5 wt .-% dimethyl sulfide and 0 - 3 wt .-%
- Acrolein is produced in a catalytic gas phase reaction in the tube bundle reactor (A).
- propylene (1) is combined with air (2) and an inert gas stream (3) composed of nitrogen and small amounts of carbon dioxide and
- the dilution of the reaction gas is necessary in order to avoid the risk of an explosive mixture and to keep temperature peaks in the catalyst bed small.
- the temperature of the gas mixture is about 130-200 ° C.
- by-products such as mainly acrylic acid, acetic acid, formaldehyde, acetaldehyde, carbon dioxide and carbon monoxide are also formed in the tube bundle reactor (A).
- the reaction gas enters the lower region of the so-called quench column (B), in which the temperature of the gas mixture is rapidly cooled by intensive contact with water. A large part of the water vapor in the gas mixture is condensed. In this region of the column, a large proportion of the by-products, mainly acrylic acid and acetic acid, is also retained and leaves the column (B) via the bottom.
- This liquid is a so-called
- Reaction gas used On the way to the top of the column, the reaction gas is brought into contact in countercurrent to a water stream, which causes a further reduction of the by-product content in the reaction gas.
- This water stream is formed from the condensation by further cooling of the reaction gas to ⁇ 20 ° C. (1.2-2.5 bara) in the upper region of the column (B) (upper "pumping")
- the liquid stream leaving the column (B) can can be pumped to the top of a stripping column (D), in which the majority of the dissolved acrolein can be recovered ..
- Inert gases can be used as stripping medium (5)
- the remaining liquid (4) can finally be sent for thermal disposal
- the AC-rich gas (11) enters the reactive absorber (C) in the standard case via a jet pump 12.
- the AC feed can also be made directly into the lower section of the reactive absorber.
- the mixture comprises the hemithioacetal of the methylmercaptopropionaldehyde formed by addition of
- the quantitative ratio between MC and AC in the liquid phase of the reactive absorber is carried out with the aid of an inline
- NIR Near infrared measurement
- the quantitative ratio between methyl mercaptan and acrolein in the mixture to a value between 0.95 and 1, 1 mol / mol, preferably between 1, 00 and 1, 01 mol / mol, more preferably between 1, 004 and 1 , 009 mol / mol, and particularly preferably to 1, 005 mol / mol is set.
- the input concentration of the gaseous acrolein (11) in the mixture is detected by means of an in-line Fourier transformed infrared (FTIR) measurement to adjust the feed, i. to be able to adjust the MC dosage (6) as early as possible.
- FTIR in-line Fourier transformed infrared
- the MMP reaction takes place mainly on the internals and in the bottom of the column (C).
- internals may e.g. structured packings, random packings or trays are used.
- the pressure at the top of the column (C) is in the range from 1 to 2.5 bara, preferably from 1.2 to 1.6 bara.
- a pump circulates a part of the MM Ps out of the
- Cooling Tower Water CCW
- CW Chilled Water
- Another portion of the MMP is discharged either as the product stream (7) after the first (preferred) or second cooling step.
- a second "pumping point" which in the standard case uses MMP from the bottom of the column (C), enters the middle of the column (C) as the absorption / reaction medium (13).
- a third "pumping" (12) enters the column below (13). Liquid and / or gaseous MC (6) is preferably added to this stream, but can also be supplied at any other point, preferably in the lower part of the column or in one of the other "pumping".
- the temperatures in the lower part of the column can be controlled by the heat exchanger in the stream (12).
- the temperature in this part of the column is in the range 20 ° C to 90 ° C, preferably 40 ° C to 75 ° C.
- the low temperatures at the top of the column (C) help to minimize AC, MC and MMP losses. However, too low temperatures cause the retention of undesirable components such as
- DMS Dimethyl sulfide
- AA acetaldehyde
- the impurities and by-products are removed by stripping at 0.3 to 5 bara, preferably at 1 to 2 bara, and at 5 to 70 ° C, preferably at 5 to 20 ° C, from the mixture.
- the process step is carried out in the presence of a homogeneous and / or heterogeneous catalyst (9).
- the catalyst is dimethylbenzylamine (DMBA) and / or triethanolamine.
- DMBA dimethylbenzylamine
- the concentration of the catalyst in the mixture is in the range of 50 to 500 ppmw, preferably in the range of 130 to 150 ppmw.
- Catalyst / stabilizer mixture which is fed continuously to the reactive absorber (C).
- C reactive absorber
- other acids and bases are possible.
- EP 1408029 exemplifies inorganic oxo acids such as e.g. Sulfuric and phosphoric acid,
- Hydrogen halides e.g. Hydrogen fluoride, bromide and chloride, called.
- organic acids e.g. aliphatic monocarboxylic acids (e.g., formic acid, propionic acid, octanoic acid, acrylic acid, trichloroacetic acid, trifluoroacetic acid), aliphatic polycarboxylic acids (oxalic acid, succinic acid, adipic acid), aromatic
- Monocarboxylic acids phenylacetic acid, benzoic acid, cinnamic acid, furoic acid,
- Thiophenecarboxylic acid and aromatic polycarboxylic acids (phthalic acid, monoesters of sulfuric acid, sulfonic acid).
- Examples of basic substances are inorganic bases (ammonia, sodium hydroxide, potassium hydroxide, ammonium carbonate, sodium carbonate, potassium carbonate,
- Sodium bicarbonate, potassium hydrogencarbonate, ammonium acetate, sodium acetate, potassium acetate) and nitrogen-containing organic bases (piperidine, triethylamine, pyridine, quinoline, urotropine, N, N-dimethylaniline).
- the present invention has the advantages that: ⁇ the absorption of AC from a gas, the MMP reaction, using crude MC and the stripping of low boilers, such as DMS, DMDS, DME, methanol, C0 2, H 2 S Water, propene, propane, acetaldehyde, in only one process step, for example in a reactive absorber, it is possible that losses of MC, AC and MMP can be minimized, ⁇ that the MC / AC stoichiometry can be controlled by using an NIR and FTIR in that a separate water condensation from the gas containing AC can be dispensed with, and that the polymer formation probability can be minimized.
- the following embodiments are intended to illustrate the advantageous aspects of the present invention.
- the gas stream (11) entering the reactive absorber (C) has the following composition (Table 1):
- methylmercaptan (6) in the following composition was introduced into the reactive absorber (C).
- Composition MC (% by weight)
- Argon 0.926 MMP product (7) was additionally distilled for 25 minutes at 200 ° C and at 30 mbara to determine the residue concentration. This was surprisingly 0.20-0.25 wt% even below the residue concentration of 0.30-0.40 wt% of an MMP sample derived from an MMP process using liquid AC ( US 3529940). Also, the residue development when stored up to 32 days in the present invention was lower at 0.03 wt% per day than in a process using liquid AC (0.05 wt% per day).
- an NIR measuring device For the most accurate setting of the MC / AC stoichiometry of 1, 004 - 1, 009, in particular, an NIR measuring device is suitable. Inline measurements allow a quick response to a change in the process, such as an adaptation of the feed streams (AC and / or MC), and thus a constant MMP quality. In addition, educt and product losses via the exhaust gas (8) are minimized.
- the input concentration of the AC gas can be carried out via an online GC measurement, but also preferably via an inline FTIR measurement.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Description
Claims
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BR112013016578-2A BR112013016578B1 (pt) | 2010-12-28 | 2011-12-15 | Processo para preparar metilmercaptopropionaldeídeo |
| SG2013048574A SG191319A1 (en) | 2010-12-28 | 2011-12-15 | Process for preparing methylmercaptopropionaldehyde |
| ES11802046T ES2741882T3 (es) | 2010-12-28 | 2011-12-15 | Procedimiento para la preparación de metilmercaptopropionaldehído |
| EP11802046.0A EP2658842B1 (de) | 2010-12-28 | 2011-12-15 | Verfahren zur herstellung von methylmercaptopropionaldehyd |
| JP2013546654A JP5980227B2 (ja) | 2010-12-28 | 2011-12-15 | メチルメルカプトプロピオンアルデヒドの製造方法 |
| CN201180063159.2A CN103476747B (zh) | 2010-12-28 | 2011-12-15 | 甲硫基丙醛的制备方法 |
| MX2013007486A MX353250B (es) | 2010-12-28 | 2011-12-15 | Proceso para preparar metilmercaptopropionaldehido. |
| RU2013135116/04A RU2595039C2 (ru) | 2010-12-28 | 2011-12-15 | Способ получения метилмеркаптопропинового альдегида |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010064250.9 | 2010-12-28 | ||
| DE102010064250A DE102010064250A1 (de) | 2010-12-28 | 2010-12-28 | Verfahren zur Herstellung von Methylmercaptopropionaldehyd |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012089518A1 true WO2012089518A1 (de) | 2012-07-05 |
Family
ID=45418663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2011/072868 Ceased WO2012089518A1 (de) | 2010-12-28 | 2011-12-15 | Verfahren zur herstellung von methylmercaptopropionaldehyd |
Country Status (12)
| Country | Link |
|---|---|
| US (2) | US8624066B2 (de) |
| EP (1) | EP2658842B1 (de) |
| JP (1) | JP5980227B2 (de) |
| CN (1) | CN103476747B (de) |
| BR (1) | BR112013016578B1 (de) |
| DE (1) | DE102010064250A1 (de) |
| ES (1) | ES2741882T3 (de) |
| MX (1) | MX353250B (de) |
| MY (1) | MY172658A (de) |
| RU (1) | RU2595039C2 (de) |
| SG (1) | SG191319A1 (de) |
| WO (1) | WO2012089518A1 (de) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MY174539A (en) | 2011-02-23 | 2020-04-24 | Evonik Degussa Gmbh | Method for producing 2-hydroxy-4-(methylthio)butanenitrile from 3-(methylthio)propanal and hydrogen cyanide |
| DE102011081828A1 (de) | 2011-08-30 | 2013-02-28 | Evonik Degussa Gmbh | Verfahren zur Umsetzung von Methylmercaptopropionaldehyd aus Roh-Acrolein und Roh-Methylmercaptan |
| BR112014003602B1 (pt) | 2011-08-30 | 2021-05-18 | Evonik Operations Gmbh | sistema de reação e método para produção contínua de um sal de metionina |
| EP2679579A1 (de) | 2012-06-27 | 2014-01-01 | Evonik Industries AG | Integriertes Verfahren zur Herstellung von Acrolein und 3-Methylmercaptopropionaldehyd |
| EP2813489A1 (de) * | 2013-06-11 | 2014-12-17 | Evonik Degussa GmbH | Verfahren zur Herstellung von lagerstabilem 3-Methylmercaptopropionaldehyd |
| EP3205643A1 (de) | 2016-02-15 | 2017-08-16 | Evonik Degussa GmbH | Verfahren zur herstellung von 3-methylthiopropionaldehyd |
| EP3339290B1 (de) * | 2016-12-22 | 2019-06-19 | Evonik Degussa GmbH | Lagerung von 3-methylthiopropionaldehyd und methylmercaptan |
| EP3453447B1 (de) * | 2017-09-06 | 2020-12-23 | Evonik Operations GmbH | Verfahren zur herstellung von alkansulfonsäure |
| CN107903197B (zh) * | 2017-12-22 | 2018-12-14 | 蓝星安迪苏南京有限公司 | 用于3-甲硫基丙醛制备及储存的稳定剂 |
| EP3604277A1 (de) | 2018-07-30 | 2020-02-05 | Evonik Operations GmbH | Verfahren zur reinigung von acrolein |
| CN111116437B (zh) | 2018-11-01 | 2021-02-05 | 山东新和成氨基酸有限公司 | 制备2-羟基-4-甲硫基丁酸及其中间体的方法和装置 |
| CN115803315A (zh) | 2020-07-08 | 2023-03-14 | 赢创运营有限公司 | 制备3-甲硫基丙醛的方法 |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2626282A (en) * | 1949-10-05 | 1953-01-20 | Standard Oil Dev Co | Vapor phase production of betamethylmercaptopropionaldehyde |
| FR1393175A (fr) | 1963-05-18 | 1965-03-19 | Distillers Co Yeast Ltd | Procédé de production d'acides aliphatiques non saturés |
| US3529940A (en) | 1966-04-25 | 1970-09-22 | Sumitomo Chemical Co | Apparatus for two-stage production of beta-methylmercaptopropionaldehyde |
| DE1768826B1 (de) | 1968-07-04 | 1971-08-26 | Degussa | Verfahren zur Gewinnung von niederen aliphatischen Mercaptanen |
| DE2627430A1 (de) | 1975-06-20 | 1976-12-23 | Rhone Poulenc Ind | Verfahren zur herstellung von beta- methylthiopropionaldehyd |
| US4319047A (en) | 1979-07-10 | 1982-03-09 | Rhone-Poulenc Industries | Preparation of beta-methylthiopropionaldehyde |
| WO1994029254A1 (en) | 1993-06-08 | 1994-12-22 | Novus International, Inc. | Process for the preparation of 3-(methylthio)propanal |
| EP0850922A1 (de) | 1996-12-27 | 1998-07-01 | Degussa Aktiengesellschaft | Verfahren zur kontinuierlichen Herstellung von Methylmercaptan |
| EP0850923A1 (de) | 1996-12-27 | 1998-07-01 | Degussa Aktiengesellschaft | Verfahren zur Auftrennung des Produkt-gasgemisches der katalytischen Synthese von Methylmercaptan |
| EP1408029A1 (de) | 2002-09-27 | 2004-04-14 | Sumitomo Chemical Company, Limited | Verfahren zur Herstellung von 3-methylthiopropanaldehyd |
| DE10359636A1 (de) | 2003-12-18 | 2005-07-28 | Degussa Ag | Verfahren zur Abtrennung von Methylmercaptan aus Reaktionsgemischen |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB653497A (en) * | 1945-10-25 | 1951-05-16 | Merck & Co Inc | Improvements in or relating to the production of ª‰-methylmercaptopropionaldehyde |
| NL6705426A (de) * | 1966-04-18 | 1967-10-19 | ||
| NL6706022A (de) * | 1966-04-30 | 1967-10-31 | ||
| NL6809647A (de) | 1968-07-09 | 1970-01-13 | ||
| DE2320544C2 (de) * | 1973-04-21 | 1975-06-05 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt | Verfahren zur Herstellung von 3-Methylmercaptopropionaldehyd |
| FR2394512A1 (fr) | 1977-06-14 | 1979-01-12 | Rhone Poulenc Ind | Procede de separation d'acide acrylique a partir de ses solutions dans le phosphate de tri-n-butyle |
| US5637766A (en) * | 1993-06-08 | 1997-06-10 | Novus International, Inc. | Process for the preparation of 3-(methylthio) propanal |
| CN1152913A (zh) * | 1994-07-11 | 1997-06-25 | 诺沃斯国际公司 | 制备3-(甲硫基)丙醛的方法 |
| DE69722195T2 (de) * | 1996-04-01 | 2004-04-01 | Union Carbide Chemicals & Plastics Technology Corp., Danbury | Verfahren zur herstellung von methylmercatopropanal |
| DE102011081828A1 (de) | 2011-08-30 | 2013-02-28 | Evonik Degussa Gmbh | Verfahren zur Umsetzung von Methylmercaptopropionaldehyd aus Roh-Acrolein und Roh-Methylmercaptan |
| BR112014003602B1 (pt) | 2011-08-30 | 2021-05-18 | Evonik Operations Gmbh | sistema de reação e método para produção contínua de um sal de metionina |
-
2010
- 2010-12-28 DE DE102010064250A patent/DE102010064250A1/de not_active Withdrawn
-
2011
- 2011-12-15 WO PCT/EP2011/072868 patent/WO2012089518A1/de not_active Ceased
- 2011-12-15 SG SG2013048574A patent/SG191319A1/en unknown
- 2011-12-15 MX MX2013007486A patent/MX353250B/es active IP Right Grant
- 2011-12-15 RU RU2013135116/04A patent/RU2595039C2/ru active
- 2011-12-15 BR BR112013016578-2A patent/BR112013016578B1/pt not_active IP Right Cessation
- 2011-12-15 EP EP11802046.0A patent/EP2658842B1/de active Active
- 2011-12-15 ES ES11802046T patent/ES2741882T3/es active Active
- 2011-12-15 CN CN201180063159.2A patent/CN103476747B/zh active Active
- 2011-12-15 JP JP2013546654A patent/JP5980227B2/ja not_active Expired - Fee Related
- 2011-12-15 MY MYPI2013002209A patent/MY172658A/en unknown
- 2011-12-27 US US13/337,434 patent/US8624066B2/en not_active Expired - Fee Related
-
2013
- 2013-10-30 US US14/067,098 patent/US8759592B2/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2626282A (en) * | 1949-10-05 | 1953-01-20 | Standard Oil Dev Co | Vapor phase production of betamethylmercaptopropionaldehyde |
| FR1393175A (fr) | 1963-05-18 | 1965-03-19 | Distillers Co Yeast Ltd | Procédé de production d'acides aliphatiques non saturés |
| US3529940A (en) | 1966-04-25 | 1970-09-22 | Sumitomo Chemical Co | Apparatus for two-stage production of beta-methylmercaptopropionaldehyde |
| DE1768826B1 (de) | 1968-07-04 | 1971-08-26 | Degussa | Verfahren zur Gewinnung von niederen aliphatischen Mercaptanen |
| DE2627430A1 (de) | 1975-06-20 | 1976-12-23 | Rhone Poulenc Ind | Verfahren zur herstellung von beta- methylthiopropionaldehyd |
| US4319047A (en) | 1979-07-10 | 1982-03-09 | Rhone-Poulenc Industries | Preparation of beta-methylthiopropionaldehyde |
| WO1994029254A1 (en) | 1993-06-08 | 1994-12-22 | Novus International, Inc. | Process for the preparation of 3-(methylthio)propanal |
| EP0850922A1 (de) | 1996-12-27 | 1998-07-01 | Degussa Aktiengesellschaft | Verfahren zur kontinuierlichen Herstellung von Methylmercaptan |
| EP0850923A1 (de) | 1996-12-27 | 1998-07-01 | Degussa Aktiengesellschaft | Verfahren zur Auftrennung des Produkt-gasgemisches der katalytischen Synthese von Methylmercaptan |
| EP1408029A1 (de) | 2002-09-27 | 2004-04-14 | Sumitomo Chemical Company, Limited | Verfahren zur Herstellung von 3-methylthiopropanaldehyd |
| DE10359636A1 (de) | 2003-12-18 | 2005-07-28 | Degussa Ag | Verfahren zur Abtrennung von Methylmercaptan aus Reaktionsgemischen |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103476747B (zh) | 2016-01-20 |
| JP5980227B2 (ja) | 2016-08-31 |
| EP2658842A1 (de) | 2013-11-06 |
| RU2013135116A (ru) | 2015-02-10 |
| MX2013007486A (es) | 2013-08-15 |
| EP2658842B1 (de) | 2019-06-12 |
| BR112013016578B1 (pt) | 2019-04-09 |
| MY172658A (en) | 2019-12-09 |
| DE102010064250A1 (de) | 2012-06-28 |
| MX353250B (es) | 2018-01-05 |
| SG191319A1 (en) | 2013-07-31 |
| JP2014508730A (ja) | 2014-04-10 |
| ES2741882T3 (es) | 2020-02-12 |
| US20120165573A1 (en) | 2012-06-28 |
| US8624066B2 (en) | 2014-01-07 |
| US20140051890A1 (en) | 2014-02-20 |
| RU2595039C2 (ru) | 2016-08-20 |
| CN103476747A (zh) | 2013-12-25 |
| BR112013016578A2 (pt) | 2016-09-27 |
| US8759592B2 (en) | 2014-06-24 |
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