EP2435484A1 - Verfahren zur herstellung von polysaccharidestern oder polysaccharidmischestern - Google Patents
Verfahren zur herstellung von polysaccharidestern oder polysaccharidmischesternInfo
- Publication number
- EP2435484A1 EP2435484A1 EP10722315A EP10722315A EP2435484A1 EP 2435484 A1 EP2435484 A1 EP 2435484A1 EP 10722315 A EP10722315 A EP 10722315A EP 10722315 A EP10722315 A EP 10722315A EP 2435484 A1 EP2435484 A1 EP 2435484A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polysaccharide
- starch
- esters
- carboxylic
- reaction
- 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- Withdrawn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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B31/00—Preparation of derivatives of starch
- C08B31/02—Esters
- C08B31/04—Esters of organic acids, e.g. alkenyl-succinated starch
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B3/00—Preparation of cellulose esters of organic acids
Definitions
- the invention relates to a process for the preparation of polysaccharide esters or polysaccharide mixed esters, in which a polysaccharide or a modified polysaccharide is reacted with at least one esterification reagent and at least one halide component, wherein an in-situ generated imidazole compound is used as the catalyst.
- Starch-based polymers such as e.g. Starch esters, starch acetate and starch propionate are known ingredients or matrices for use in the food industry, as fibers and as plastics.
- a starch ester is obtained by the reaction with the corresponding acid or acid anhydride alone or by the addition of a catalyst.
- catalysts e.g. amine organic compounds, acids or alkaline aqueous solutions known for this quasi-homogeneous process.
- starch esters with a higher molecular mass can generally be produced.
- Starch mixed esters can be obtained by reacting the starch with various carboxylic acids, carboxylic anhydrides, acid chlorides or by transesterification of vinyl esters.
- TFEA trifluoroacetic anhydride
- the process described here makes it possible, due to prior dehydration of the starch in the slurry with the corresponding carboxylic acid anhydride by formation of the corresponding carboxylic acid and due to the use of Imidazolderivaten in short Time to obtain highly substituted starch esters.
- the imidazole derivatives do not catalyze the esterification reaction by activation of the carboxylic acid, but by in-situ formation of the corresponding SaI- ze after addition of a halide component, such as
- Carboxylic acid chlorides Furthermore, a wide variety of mixed starch esters can be obtained by varying the carboxylic acid anhydrides used and using a wide variety of acid chlorides.
- a process for the preparation of polysaccharide esters or polysaccharide mixed esters in which a polysaccharide or a modified polysaccharide having at least one esterification reagent selected from the group consisting of carboxylic acids, carboxylic anhydrides, carboxylic acid halides, carboxylic acid esters and mixtures thereof and at least one halide component selected from the group consisting of carboxylic acid halides, halide ethers, alkyl halides, halocarboxylic acids, hydrogen halides and mixtures thereof.
- esterification reagent selected from the group consisting of carboxylic acids, carboxylic anhydrides, carboxylic acid halides, carboxylic acid esters and mixtures thereof
- halide component selected from the group consisting of carboxylic acid halides, halide ethers, alkyl halides, halocarboxylic acids, hydrogen halides and mixtures thereof.
- a particular feature of the present invention is the process control in the presence of at least one in-situ generated imidazole compound of general formula I.
- R, R ⁇ R ⁇ ⁇ and R X ⁇ ⁇ are independently selected from the group consisting of Ci-Ci 2 alkyl, C 2 -Ci 2 -Alke- nyl, C 2 -C 2 alkynyl, the other functional groups selected may comprise, for example, carbonyl, nitro, halide, thiol and ether functionalities and primary, secondary and tertiary amine groups, as a catalyst and X " a counterion, in particular a halide ion selected from the group consisting of fluoride, chloride, bromide or iodide.
- reaction time may be less than 120 minutes or less than 90 minutes.
- the reaction can be carried out at low temperatures, ie a temperature control at 95 0 C is possible, with a brief heating to 115 0 C is performed.
- the imidazole compound used in the reaction can be recycled and optionally reused for further modifications.
- starch esters e.g. Starch acetates or starch propionates
- air-dry starch is first added in the esterification reagent, e.g. a carboxylic acid anhydride, suspended under heating, before the imidazole compound is added and the reaction temperature is increased. Subsequently, the addition of the halide component and a second anhydride component takes place in the reaction mixture.
- the reaction time is a maximum of 2 h and leads to highly substituted starch esters.
- starch mixed esters either different carboxylic acid anhydrides are used as the reactive reaction medium or, after partial esterification of the starch, another esterifying reagent, e.g. in the form of a carboxylic acid chloride.
- starch esters or starch mixed esters can be synthesized within a very short time under moderate reaction conditions on a larger scale.
- the imidazole compound is selected from salts of the group consisting of 1-methylimidazole,
- the molar ratio of imidazole compound to polysaccharide or modified polysaccharide is preferably in the range of 1: 2 to 1: 0.3.
- the molar ratio of imidazole compound to halide component is preferably in the range of 1: 1 to 1: 0.4.
- esterification reagent is preferably straight or branched chain C 1 -C 2 O-carboxylic acids, Ci-C anhydrides 20 -carbonyl and / or Ci-C 20 -carboxylic, and in particular linear or branched C x - C 6 carboxylic acids, Ci- C 6 carboxylic anhydrides and / or C 1 -C 6 -carboxylic acid halides used.
- the carboxylic acids, carboxylic anhydrides and / or carboxylic acid halides may also be substituted by ether, allyl, vinyl and / or quaternary nitrogen groups.
- Suitable polysaccharides are both modified and unmodified starches or celluloses.
- starch this can come from wheat, rice, corn, potatoes, peas, barley, rye and / or millet.
- the reactive reaction is carried out preferably at a temperature in the range of 90 0 C to 200 0 C.
- reaction temperatures of 9O 0 C to 150 0 C and particularly preferably from 95 ° C to 120 0 C.
- the reaction takes place within a maximum of 24 h and preferably within 2 h.
- a preferred variant of the inventive It provides that the polysaccharide and / or the modified polysaccharide is dewatered before the reaction.
- the dehydration is preferably carried out at a temperature of 80 to 120 0 C.
- a further preferred variant provides that the polysaccharide can be homogeneously derivatized up to a weight fraction of 50% by weight of the reaction mixture.
- Fig. 1 shows the reaction scheme for the synthesis of starch acetate propionate laurate.
- Air-dry starch (solids content 88.9%) is added to 2.25 molar acetic anhydride with stirring in a suitable reaction vessel and heated to 95 0 C. After 45 min at this temperature, 0.7 molar equivalents of 1-methylimidazole are added to the reaction mixture and increases the reaction temperature to 115 0 C. After stirring the reaction for 10 minutes at this temperature, 0.5 moleq of dodecanoic acid chloride is added dropwise to the reaction followed by another 2.25 mole of acetic anhydride. The reaction mixture is stirred for a further 45 minutes before it is cooled to room temperature. The homogeneous mixture is precipitated in ethanol and washed with it. The result is a starch acetate laurate with a total degree of substitution of 2.4, with the DS AC budget 2.35 and the DS is Laurat 0.05.
- Propionic anhydride was added as the first carboxylic acid anhydride component and the second acetic anhydride analogously to Example 11.
- Example 12 Analogously to Example 12 was added as the first carboxylic acid anhydride component acetic anhydride and as the second propionic anhydride.
- the chloride component used was 0.5 moleq of trimethylsilyl chloride.
- the result is a starch acetate propionate with a total degree of substitution of 2.97, wherein the
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009022805A DE102009022805B4 (de) | 2009-05-27 | 2009-05-27 | Verfahren zur Herstellung von Polysaccharidestern oder Polysaccharidmischestern |
| PCT/EP2010/003200 WO2010136191A1 (de) | 2009-05-27 | 2010-05-26 | Verfahren zur herstellung von polysaccharidestern oder polysaccharidmischestern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2435484A1 true EP2435484A1 (de) | 2012-04-04 |
Family
ID=42538232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10722315A Withdrawn EP2435484A1 (de) | 2009-05-27 | 2010-05-26 | Verfahren zur herstellung von polysaccharidestern oder polysaccharidmischestern |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9181352B2 (de) |
| EP (1) | EP2435484A1 (de) |
| DE (1) | DE102009022805B4 (de) |
| WO (1) | WO2010136191A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008024089B4 (de) * | 2008-05-17 | 2011-09-22 | Friedrich-Schiller-Universität Jena | Verfahren zur Herstellung eines Klebers und Verwendung eines Polysaccharidesters |
| DE102009022805B4 (de) | 2009-05-27 | 2013-04-25 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zur Herstellung von Polysaccharidestern oder Polysaccharidmischestern |
| CZ2012842A3 (cs) | 2012-11-27 | 2014-08-20 | Contipro Biotech S.R.O. | Nanomicelární kompozice na bázi C6-C18-acylovaného hyaluronanu, způsob přípravy C6-C18-acylovaného hyaluronanu, způsob přípravy nanomicelární kompozice a stabilizované nanomicelární kompozice a použití |
| DE102016103792B4 (de) * | 2016-03-03 | 2018-01-11 | Se Tylose Gmbh & Co. Kg | Mit Hydroxy- und Alkingruppen und mit Hydroxyalkyl-, Alkin- und Azidgruppen substituierte Celluloseether, Verfahren zu deren Herstellung und deren Verwendung als wasserunlösliche Klebstoffe |
| DE102022117375A1 (de) * | 2022-07-12 | 2024-01-18 | Robert Boyle - Thüringisches Institut für BioWasserstoff- und Umweltforschung e.V. | Verfahren zur Herstellung von thermoplastischen Polysaccharidestern |
| JP2025525254A (ja) * | 2022-07-29 | 2025-08-01 | エバーコーン・インコーポレイテッド | 生物由来のデンプン混合エステルの生分解可能及び/又は堆肥化可能な組成物並びにその製造方法 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3389740A (en) | 1966-02-07 | 1968-06-25 | Allan Moyer Buehler | Door operators |
| US3720663A (en) * | 1971-06-24 | 1973-03-13 | Nat Starch Chem Corp | Preparation of starch esters |
| US4011392A (en) * | 1975-09-02 | 1977-03-08 | The Sherwin-Williams Company | Mixed starch esters and the use thereof |
| US4020272A (en) * | 1975-12-22 | 1977-04-26 | National Starch And Chemical Corporation | Preparation of starch esters |
| DE59006199D1 (de) * | 1989-08-29 | 1994-07-28 | Biotechnolog Forschung Gmbh | Verfahren zur schonenden veresterung einer carbonsäure mit einer alkoholkomponente. |
| JP2939586B1 (ja) | 1998-11-25 | 1999-08-25 | 日本コーンスターチ株式会社 | 澱粉エステル |
| DE102004024241A1 (de) * | 2004-05-12 | 2005-12-08 | Friedrich-Schiller-Universität Jena | Wasserlösliche, lager- und hydrolysestabile sowie nebenproduktfreie Stärkeacetate und Verfahren zu ihrer Herstellung und Verwendung |
| US8241656B2 (en) | 2005-09-21 | 2012-08-14 | Surmodics, Inc | Articles including natural biodegradable polysaccharides and uses thereof |
| US8148518B2 (en) | 2007-02-14 | 2012-04-03 | Eastman Chemical Company | Cellulose esters and their production in carboxylated ionic liquids |
| DE102007053630A1 (de) * | 2007-11-08 | 2009-05-14 | Basf Se | Verfahren und Herstellung ionischer Flüssigkeiten durch Anionenaustausch |
| DE102008024089B4 (de) * | 2008-05-17 | 2011-09-22 | Friedrich-Schiller-Universität Jena | Verfahren zur Herstellung eines Klebers und Verwendung eines Polysaccharidesters |
| DE102009022805B4 (de) | 2009-05-27 | 2013-04-25 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zur Herstellung von Polysaccharidestern oder Polysaccharidmischestern |
-
2009
- 2009-05-27 DE DE102009022805A patent/DE102009022805B4/de not_active Expired - Fee Related
-
2010
- 2010-05-26 WO PCT/EP2010/003200 patent/WO2010136191A1/de not_active Ceased
- 2010-05-26 EP EP10722315A patent/EP2435484A1/de not_active Withdrawn
- 2010-05-26 US US13/322,372 patent/US9181352B2/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| ANONYMOUS: "Gute und schlechte Abgangsgruppen ::: Organische Chemie ::: Chemieseite.de", 4 January 2017 (2017-01-04), XP055332012, Retrieved from the Internet <URL:https://www.chemieseite.de/organisch/node154.php> [retrieved on 20170104] * |
| See also references of WO2010136191A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102009022805A1 (de) | 2010-12-02 |
| WO2010136191A1 (de) | 2010-12-02 |
| US20120172587A1 (en) | 2012-07-05 |
| DE102009022805B4 (de) | 2013-04-25 |
| US9181352B2 (en) | 2015-11-10 |
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