WO2002038527A1 - Verfahren zur herstellung von poly- oder monomethylolalkansäuren - Google Patents
Verfahren zur herstellung von poly- oder monomethylolalkansäuren Download PDFInfo
- Publication number
- WO2002038527A1 WO2002038527A1 PCT/EP2001/012563 EP0112563W WO0238527A1 WO 2002038527 A1 WO2002038527 A1 WO 2002038527A1 EP 0112563 W EP0112563 W EP 0112563W WO 0238527 A1 WO0238527 A1 WO 0238527A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- poly
- reaction
- general formula
- hydrogen peroxide
- acids
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/47—Separation; Purification; Stabilisation; Use of additives by solid-liquid treatment; by chemisorption
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/285—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with peroxy-compounds
Definitions
- the invention relates to a process for the preparation of poly- or monomethylolalkanoic acids, in particular dirnehylolalkanoic acids.
- Chemical abstract 131: 20530 discloses from Pige Huagong (1998), 15 (6), 27-29, a technical report by the Institute of Applied Chemistry at the University of Anhui in Hefei, People's Republic of China, which describes the production of dimethylolpropionic acid by oxidation of the dimethylolpropanal by means of H 2 0.
- H 2 0 is added to dirnethylolpropanal at 50 to 60 ° C. and the resulting reaction mixture is gradually heated to 95 ° C.
- the present invention was therefore based on the object of providing a process for the preparation of polymethylolalkanoic acids or monomethylolalkanoic acids by means of which the selectivity can be increased significantly in order to reduce the proportion of by-products and the yield of desired polymethylolalkanoic acid or monomethylolalkanoic acid to increase.
- This object is achieved by a process for the preparation of poly- or monomethylolalkanoic acids of the general formula (I)
- R can be identical or different and denotes a substituted or unsubstituted aliphatic hydrocarbon having 1 to 22 C atoms, an aryl or arylalkyl group having 6 to 22 C atoms or a methylol group, from the corresponding poly- or monomethylolalkanals of the general formula (II)
- R wherein R has the meaning given above, by oxidation with hydrogen peroxide, which is characterized in that the poly- or monomethylolalkanal of the general formula (II) has a total content of metal ions of groups 3 to 14 of the periodic table of the elements up to 5 ppm.
- the poly- or monomethylolalkanal of the general formula (II) preferably contains iron (II), iron (III), chromium (III), chromium (IV) and nickel (II) from groups 3 to 14 of the periodic table of the elements.
- the total content of the poly- or monomethylolal channels of the general formula (II) should not exceed 5 ppm, the content per metal ion depending on the number of metal ions present being 0.001 to 5 ppm, preferably 0.001 to 2 ppm.
- the process for the preparation of the polymethylolalkanoic acids can be carried out by reacting the polymethylolalkanals required as starting compounds as a pure substance or in a mixture with other compounds. Since the corresponding polymethylolalkanals are produced, for example, by aldol reaction of the corresponding aliphatic aldehydes with formaldehyde in the presence of a basic catalyst, the reaction product in this reaction could be fed directly to the oxidation reaction to the polymethylolalkanoic acid.
- the yield of the oxidation of the poly- or monomethylolalkanal can be significantly improved if the metal ion content of the poly- or monomethylolalkane is limited without losing the poly- or monomethylolalkanal.
- Metal ions generally get into the poly- or monomethylolalkanal through corrosion of system parts in the aldolization. Poly or monomethylolalkanal with a reduced metal ion content can therefore be avoided by avoiding the introduction of metal ions, for example by choosing suitable metal-free materials such as glass, enamel, or high-quality materials such as titanium or high-quality alloys for storage and intermediate containers, pipes, reactors, Distillation and rectification columns can be obtained.
- the metal ions can be separated from the poly- or monomethylolal channels and / or the starting materials required for their preparation, such as formaldehyde or aliphatic aldehydes, by treatment with absorbents and / or by complexation and subsequent membrane separation processes, preferably by treatment with absorbents ,
- a highly polymeric, soluble complexing agent is added, which complexes the metal ions contained in the feed.
- Polymers of any kind can be used as complexing agents which contain functional groups (for example COOH, NR 2 , etc.) suitable for complexation or heteroatoms such as N or P.
- functional groups for example COOH, NR 2 , etc.
- polyimines of suitable molecular weight can be used.
- the complexed polymer and the excess of non-complexed polymer is then removed from the membrane over a suitable membrane (organic or inorganic) Separated hydrogenation feed.
- the corresponding suitable membrane retains the complexing agent together with the bound metal ions, the poly or monomethylolalkanal passes through the membrane and is then oxidized.
- Activated carbons, acidic or basic ion exchangers or their mixtures, metal oxides or molecular sieves are preferably used as absorbents, chelation exchangers being particularly preferred.
- Suitable activated carbons have, for example, a surface area of 500 to 2000 m 2 / g according to DIN 66 131 and a porosity of 0.05 to 1.0 cm 3 / g according to DIN 66134 and are available from Merck, Darmstadt, from Chemviron Midwest Corp., Wooster, USA under the trade name CPG LF 8 30 ® and the company Lurgi AG, Frankfurt, under the trade name Carboraffin P ® .
- Suitable ion exchangers are, for example that of the company Merck, Darmstadt, marketed strongly acidic ion exchanger IR ® 120, preferably chelation exchanger such as Amberlite ® TRL from Rohm & Haas, Darmstadt, Lewatit ® TP 207 from Bayer AG, Leverkusen, Chelese ® 100 Merck, Darmstadt in all possible forms, for example granular or as a gel.
- alpha or gamma aluminum oxide, silicon oxide, titanium dioxide in the anastase or rutile modification, zirconium dioxide, magnesium oxide, calcium oxide, zinc oxide or mixtures of metal oxides such as aluminosilicates can be used as metal oxides.
- Suitable aluminum oxide is sold, for example, by Condea Chemie AG, Hamburg, under the trade name Pural ® SB.
- Suitable molecular sieves are, for example aluminosilicates or zeolites with a pore diameter of greater than 3 ⁇ , for example Zeokat ® Z 6 01-01-y zeolite or molecular sieves, Zeochem ® 13x13 zeolite Company Uetikon AG, Switzerland.
- the absorbents can be in the form of shaped bodies such as spheres, strands, tablets, grit or powder.
- the poly- or monomethylolalkanal and / or the starting material required for its production at a temperature between the solidification point and the boiling point of the poly- or monomethylolalkanal or the starting material required for its production, the metal ion content of which is to be reduced is preferably from 20 to 150 ° C, particularly preferably at 40 to 100 ° C, and pressures from 0.001 to 200 bar, preferably at 0.5 to 10 bar, in a stirred tank, but preferably by passing through an absorbent in a fixed bed.
- the poly- or monomethylolalkanals are prepared by aldol reaction from the corresponding aliphatic aldehydes and formaldehyde in the presence of a basic catalyst according to WO 98/28253, to which reference is expressly made here.
- the reaction discharge of the aldolization according to WO 98/28253 is passed, preferably on the still depressurized side, directly over an absorbent in a fixed bed, particularly preferably a chelation exchanger, and then fed to the oxidation to the corresponding dimethylolalkanoic acids.
- ion exchangers as absorbents, the manufacturer's recommendation for the optimum temperature range of the respective ion exchanger should be taken into account within the temperature ranges mentioned above.
- the residence time of the poly- or monomethylolalkanal or of the starting material required for its preparation depends on the affinity of the absorbent and is generally between 1 min and 24 h, but is preferably 5 to 30 min. It is possible to use the poly- or monomethylolalkanal or the starting material required for its production in a solvent, preferably in the form of a 20 to 60% by weight solution. Examples of suitable solvents are water, alcohols such as methanol and ethanol, or 0.1 to 99% alcohol-water mixtures.
- the treatment with the absorbent is preferably carried out in water or a 0.1 to 99% alcohol / water mixture.
- the absorbent can be regenerated, for example depending on the absorbent, by rinsing with water, alkalis or acids and then washing with water.
- Acidic or strongly acidic ion exchangers are preferably regenerated with aqueous hydrochloric acid, sulfuric acid, formic acid or acetic acid, while basic or strongly basic ion exchangers can preferably be regenerated with aqueous sodium hydroxide solution, potassium hydroxide solution or Ca (OH) 2 . Avoiding the introduction of metal ions is particularly preferably combined with the treatment of the poly- or monomethylolalkanals or the starting materials required for their production with an absorbent.
- At least the initial phase of the reaction is the reaction time required to meter the hydrogen peroxide to the alkanal.
- the initial phase is defined such that it comprises at least the time in which the components are metered in, the initial phase comprising at least about 1% of the reaction or residence time of the reaction mixture.
- the end phase is understood to mean the reaction or residence time in which the reaction components are mixed in the desired ratio and at a higher temperature than in the initial phase, i.e. be allowed to continue reacting at a temperature above 85 ° C.
- the reaction proceeds more selectively than in the reaction procedures known in the prior art. Due to a reaction temperature of at least 40 ° C. and preferably 60 ° C. during the initial phase, the reaction with hydrogen peroxide also takes place more quickly and an accumulation is counteracted, so that the reaction procedure according to the invention also brings safety-related advantages. In addition, boiling cooling can be achieved at this initial temperature even at a low negative pressure, which can be used advantageously for carrying out the reaction. In this way, the evaporation enthalpy of the solvent can be used to dissipate the high heat of reaction, which enables faster metering and can be used independently of other heat exchangers. In addition, solvents can be removed without additional energy expenditure. However, the reaction temperature during the initial phase must not be too high either, because at temperatures of> 95 ° C hydrogen peroxide is decomposed without causing the desired oxidation reaction.
- the reaction temperature is> 85 to 110 ° C, preferably> 85 to 105 ° C.
- the change of temperatures between the beginning and the end phase can take place as quickly as possible.
- the process is fundamentally suitable for the production of poly- or monomethylolalkanoic acids, it preferably relates to the production of dimethylolalkanoic acids from the corresponding dimethylolalkanals.
- dimethylolalkanoic acids or dimethylolalkanals in which the aliphatic hydrocarbon radical R has 1 to 5 carbon atoms.
- dirnethylolalkanals as starting compounds to be oxidized, the aliphatic radical of which has one or two carbon atoms, which is then dimethylolbutanal or dimethylolpropanal.
- An aqueous solution of hydrogen peroxide is used as the oxidizing agent, with a content of 5 to 60%, preferably 30 to 50%, of hydrogen peroxide.
- This concentration range advantageously provides a minimum amount of oxidizing agent per unit volume of solvent. It has been shown that too much water present at the end of the reaction greatly hinders subsequent work-up, owing to the high solubility of the desired end product, and even a further work-up step, e.g. Evaporation may require. On the other hand, it has also been shown that too high concentrations of hydrogen peroxide, i.e. Concentrations above 60% are not very advantageous because the hydrogen peroxide then tends to decompose.
- the stoichiometric ratios ie the ratio of added hydrogen peroxide as the oxidizing agent to the compound to be oxidized
- compliance with a defined stoichiometric ratio has a significant effect on the yield. It has now been found in the context of the present invention that the significantly higher selectivity which is achieved in the reaction carried out according to the invention is also due to the changed stoichiometric ratio calculation compared to the prior art.
- the amount of formaldehyde and dimethylolpropionaldehyde in the reaction solution at the beginning of the oxidation reaction is in principle used to calculate the stoichiometric ratio.
- the ratio of the hydrogen peroxide used to the sum of these aldehydic compounds mentioned is 0.5 to 0.99, preferably 0.7 to 0.99, particularly preferably 0.85 to 0.95. That the oxidizing agent is used substoichiometric to the amount of the compounds to be oxidized.
- the process according to the invention enables the polymethylolalkanoic acids to be prepared with a purity of> 96%. These are then obtained in the stated purity by crystallization from the reaction mixture, solid / liquid separation and subsequent washing with water or another suitable solvent or solvent mixture, without further purification steps, such as e.g. Extraction, going through an ion exchanger or the like would be necessary. As a result, the method according to the invention is less complex. Buffering of the reaction solution is also not necessary in the present process.
- the resulting filtrate from the solid / liquid separation can be further concentrated by removing the distillate at normal pressure or under reduced pressure, so that the corresponding polymethylolalkanoic acid is again obtained in crystalline form on cooling.
- This can be separated from the mother liquor by solid / liquid separation.
- the mother liquor obtained in this way can in turn be concentrated and processed further.
- the purity of the crystals can be increased by washing or recrystallization. However, cleaning can also be dispensed with and the crystals can be returned to the next reaction run before crystallization. This achieves a cleaning effect without having to provide an additional procedural step.
- wash water of the first crystals which may still contain the end product due to the partially high solubility of the polymethlolalkanoic acids, can be returned to the next run.
- the solvent returned in this way at the same time as the end product can then be removed by distillation at normal pressure or in vacuo.
- the mother liquor obtained through a single or repeated reprocessing has a significantly lower water content. Therefore, disposal by incineration 10 can be done much more cost-effectively, since less water has to be heated and evaporated.
- 0.5 to 1 g of a sample of a poly- or monomethylolalkanal were subjected to an acid digestion process in which the sample was initially treated with 0.2 ml of an aqueous NaSO 4 solution (200 g / l
- examples 1 to 3 according to the invention clearly show how the metal ion content affects the reaction of dimethylolpropanal with hydrogen peroxide.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (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
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2003-7006254A KR20030048462A (ko) | 2000-11-08 | 2001-10-31 | 폴리- 또는 모노메틸올 알칸산의 제조 방법 |
JP2002541066A JP2004513158A (ja) | 2000-11-08 | 2001-10-31 | ポリメチロールアルカン酸又はモノメチロールアルカン酸の製造方法 |
EP01993594A EP1335893A1 (de) | 2000-11-08 | 2001-10-31 | Verfahren zur herstellung von poly- oder monomethylolalkansäuren |
US10/399,493 US20040034243A1 (en) | 2000-11-08 | 2001-10-31 | Method for producing poly-or monomethylol alkanoic acids |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10055181A DE10055181A1 (de) | 2000-11-08 | 2000-11-08 | Verfahren zur Herstellung von Poly- oder Monomethylolalkansäuren |
DE10055181.5 | 2000-11-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002038527A1 true WO2002038527A1 (de) | 2002-05-16 |
Family
ID=7662457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2001/012563 WO2002038527A1 (de) | 2000-11-08 | 2001-10-31 | Verfahren zur herstellung von poly- oder monomethylolalkansäuren |
Country Status (7)
Country | Link |
---|---|
US (1) | US20040034243A1 (de) |
EP (1) | EP1335893A1 (de) |
JP (1) | JP2004513158A (de) |
KR (1) | KR20030048462A (de) |
CN (1) | CN1473142A (de) |
DE (1) | DE10055181A1 (de) |
WO (1) | WO2002038527A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003000637A1 (fr) * | 2001-06-21 | 2003-01-03 | Kyowa Yuka Co., Ltd. | Procede de preparation d'acides $g(a),$g(a)-bis(hydroxymethyl) carboxyliques |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200449402Y1 (ko) * | 2008-03-18 | 2010-07-07 | 박주강 | 레저용 다기능 서프보드 |
CN103709025B (zh) * | 2013-12-30 | 2015-04-22 | 万华化学集团股份有限公司 | 一种2,2-二羟甲基烷酸的制备方法 |
CN108658752A (zh) * | 2018-06-20 | 2018-10-16 | 江西吉煜新材料有限公司 | 一种制备2,2-二羟甲基丙酸的方法 |
CN108658754A (zh) * | 2018-06-20 | 2018-10-16 | 李先明 | 一种连续生产2,2-二羟甲基丁酸的装置及工艺 |
CN108658753A (zh) * | 2018-06-20 | 2018-10-16 | 江西吉煜新材料有限公司 | 一种2,2-二羟甲基丙酸的连续生产装置及工艺 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2746916A (en) * | 1952-02-20 | 1956-05-22 | Nat Dairy Res Lab Inc | Production of lactobionic acid and its delta-lactone |
US3312736A (en) * | 1963-07-29 | 1967-04-04 | Trojan Powder Co | Method of making polymethylol-alkanoic acids |
US3872166A (en) * | 1972-07-01 | 1975-03-18 | Hermann Spaenig | Improvement in the recovery of glyoxylic acid |
EP0937701A1 (de) * | 1998-02-18 | 1999-08-25 | Nippon Kasei Chemical Co., Ltd. | Verfahren zur Herstellung von 2,2-bis (Hydroxymethyl)alkansäure |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54133495A (en) * | 1978-04-10 | 1979-10-17 | Asahi Chem Ind Co Ltd | Recovering method for liquid phase oxidation catalyst |
DE19632922A1 (de) * | 1996-08-16 | 1998-02-19 | Bayer Ag | Verfahren zur Herstellung von Hydroxypivalinsäure |
-
2000
- 2000-11-08 DE DE10055181A patent/DE10055181A1/de not_active Withdrawn
-
2001
- 2001-10-31 US US10/399,493 patent/US20040034243A1/en not_active Abandoned
- 2001-10-31 KR KR10-2003-7006254A patent/KR20030048462A/ko not_active Application Discontinuation
- 2001-10-31 WO PCT/EP2001/012563 patent/WO2002038527A1/de not_active Application Discontinuation
- 2001-10-31 CN CNA018185541A patent/CN1473142A/zh active Pending
- 2001-10-31 EP EP01993594A patent/EP1335893A1/de not_active Withdrawn
- 2001-10-31 JP JP2002541066A patent/JP2004513158A/ja not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2746916A (en) * | 1952-02-20 | 1956-05-22 | Nat Dairy Res Lab Inc | Production of lactobionic acid and its delta-lactone |
US3312736A (en) * | 1963-07-29 | 1967-04-04 | Trojan Powder Co | Method of making polymethylol-alkanoic acids |
US3872166A (en) * | 1972-07-01 | 1975-03-18 | Hermann Spaenig | Improvement in the recovery of glyoxylic acid |
EP0937701A1 (de) * | 1998-02-18 | 1999-08-25 | Nippon Kasei Chemical Co., Ltd. | Verfahren zur Herstellung von 2,2-bis (Hydroxymethyl)alkansäure |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003000637A1 (fr) * | 2001-06-21 | 2003-01-03 | Kyowa Yuka Co., Ltd. | Procede de preparation d'acides $g(a),$g(a)-bis(hydroxymethyl) carboxyliques |
Also Published As
Publication number | Publication date |
---|---|
DE10055181A1 (de) | 2002-05-29 |
JP2004513158A (ja) | 2004-04-30 |
EP1335893A1 (de) | 2003-08-20 |
US20040034243A1 (en) | 2004-02-19 |
KR20030048462A (ko) | 2003-06-19 |
CN1473142A (zh) | 2004-02-04 |
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