WO2013083229A1 - Verfahren zur aufreinigung von carbonsäuren aus fermentationsbrühen - Google Patents
Verfahren zur aufreinigung von carbonsäuren aus fermentationsbrühen Download PDFInfo
- Publication number
- WO2013083229A1 WO2013083229A1 PCT/EP2012/004741 EP2012004741W WO2013083229A1 WO 2013083229 A1 WO2013083229 A1 WO 2013083229A1 EP 2012004741 W EP2012004741 W EP 2012004741W WO 2013083229 A1 WO2013083229 A1 WO 2013083229A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- acid
- separation
- biomass
- fermentation
- lactic acid
- Prior art date
Links
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/08—Apparatus therefor
-
- 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
Definitions
- the invention relates to a process for the purification of carboxylic acids from fermentation broths, and to a device for carrying out the method according to the invention.
- the isolation of carboxylic acids, which can not be separated or only with difficulty by distillation, is very complicated.
- succinic acid for example.
- the qualities of the succinic acid produced can be differentiated by the subdivision into a technical grade with a succinic acid content of at least 97% by mass and a succinic acid (polymer grade or 1,4 butanediol grade) especially suitable for use for the polymerization with a content of at least 99% , 5 Mao / o.
- Extractive processes using extraction agents such as tributylamines, trialkylamines, olefins, various alcohols and aromatic
- Membrane processes such as, for example, reverse osmosis and other filtration processes, wherein also couplings of these processes and supplementation by further prior art corresponding steps are discussed.
- Such methods are described inter alia in the patents DE 69821951 T2; DE 69015233 T2; DE 69015019 T2; DE 69006555 T2; DE 69015019; DE 60028958T2; DE 10 2004 026152 A1.
- lactic acid can be isolated, for example, from a fermentation broth acidified with sulfuric acid, which in addition to free lactic acid still contains ammonium and sulfate ions, can be isolated by means of chromatographic methods.
- DE 69815369 T2 describes, inter alia, the separation of lactic acid from aqueous mixtures by adsorption on a solid adsorbent, preferably a solid adsorbent is used here, which adsorbs lactic acid versus lactate.
- weak anion exchangers for lactic acid isolation come into question.
- DE 10 2009 019 248 A1 further describes chromatographic Methods for purifying organic acids, in particular lactic acid, by performing Simulated Moving Bed Chromatography.
- WO 2006/124633 A1 describes a process for the production of ammonium lactate by fermentation.
- the ammonium salt of lactic acid formed from the fermentation solution e.g. can be separated by extraction.
- the ammonium salt can be easily split in a subsequent step with weak acids or carbon dioxide. This gives you the free lactic acid, which can then be purified by distillation, for example.
- WO99 / 19290 describes a lactic acid fermentation with subsequent filtration and extraction, wherein the extraction may be an adsorption.
- the type of interaction with the solid phase of adsorption is not disclosed.
- a similar process is disclosed in WO93 / 06226, in which case the solid phase of the adsorption is provided with tertiary amino groups and thereby the production rate of free acid is increased.
- EP0135728 also teaches the isolation of enzymatically produced carboxylic acids via adsorbers which are provided with tertiary amino groups. The fermentation takes place via cells immobilized on columns.
- DE19939630C2 discloses a process for the fine purification of aqueous solutions containing fermentatively produced organic acids, such as, for example, citric acid, lactic acid, succinic acid or tartaric acid.
- the solution coming from the fermentation is first filtered and then the resulting solution is passed through an anion exchanger and a subsequent Adsorberharzbett.
- the adsorbent resin bed used for the fine cleaning is initially loaded with OH " ions and binds the product acid, and there is no mention of further purification of the filtered solution downstream of the filtration to remove impurities contained, such as cell debris, carbohydrates, nutrients, amino acids and sugars.
- the solid adsorbent may here be a poly-4-vinylpyridine resin or a tertiary polystyrene-bivinylbenzene-amine resin. Again, an intermediate step to remove other contaminants is not taught.
- the object of the invention is to provide a process for the separation and purification of carboxylic acids from fermentation broths which has a high product purity of> 80% by mass and avoids known disadvantages of other processes.
- the object is achieved by the use of a process for the separation and purification of carboxylic acids from fermentation broths, the process comprising the following steps,
- the advantage of this method is that is greatly reduced by the arranged before the adsorption fine cleaning, the content of impurities in the fermentation broth from step a), which is then sent through the solid phase of adsorption, whereby the production rate of carboxylic acid on can be increased and the equipment cost is reduced, creating a cheaper method, as disclosed for example in EP0135728, created.
- EP0135728 proposes to strongly adsorb the carboxylic acids and to carry out a circulation process in highly contaminated fermentation solutions, which is very expensive.
- Another advantage of the inventive method is that is not neutralized during the fermentation and the separation and purification with the free acid and not with its salt, as is often the case in the prior art.
- the process is simplified in that no acidification step is necessary and thus no further substances added during the fermentation must be separated off, which are normally used in the prior art for neutralization.
- microorganisms for the fermentation itself, a variety of microorganisms can be used, including bacteria, yeasts and fungi.
- the fermentation broth may also contain various recycle streams from the overall process.
- the fermentation broth containing the carboxylic acid, biomass and constituents of the substrate is continuously fed to precoat filtration and / or microfiltration and / or ultrafiltration.
- the resulting separated biomass is optionally returned to the fermenter.
- temperature and pH correspond to the values of the fermentation, since it was found that by inactivating the biomass by increasing the temperature and lowering the pH by adding acid autolysis of the biomass is accelerated and more lysis products be discharged into the fermentation broth.
- the time between completion of the fermentation and separation of the biomass should be kept as short as possible and should not be more than 2 hours, preferably less than 1-2 hours.
- the biomass concentration in the filtrate should not exceed 1 g / l. This process management positively influences the end product quality.
- step b In order to produce the production of carboxylic acids in a high-purity quality, a fine cleaning is performed due to still existing residues of dyes and impurities in step b), which is preferably configured as nanofiltration.
- membranes of a separation size of 100 to 400 Da are used. It was shown that nanofiltration with a cut-off of 200 Da gives good quality results.
- the process is conducted so that the retentate of the nanofiltration is not more than 10% of the total throughput.
- the permeate is fed to the further process step c).
- a reverse osmosis is carried out between the process steps b) and c). This step will serve as an exemplary further way of concentrating before
- tertiary amino groups are preferably used, which are pryridine, which are preferably selected from the group comprising polyvinylpyridine and poly-2 or poly-4-vinylpyridine.
- the one or more solid phase used for adsorption in process step c) is a polymer which is crosslinked with divinylbenzene.
- the one or more solid phase used for adsorption in process step c) is formed from one or more different polymer materials.
- Further suitable polymers having tertiary amino groups which selectively adsorb carboxylic acids and permit their desorption with polar solvents are described, for example, in DE 1274128 and DE 3043766.
- the adsorbed carboxylic acids are desorbed in process step c) preferably by treatment with a polar solvent from the group of aliphatic alcohols, aliphatic ketones and aliphatic carboxylic acid esters.
- Desorption is particularly preferably carried out by means of methyl acetate or ethyl acetate, acetone or methyl ethyl ketone and in particular with lower alcohols such as ethanol and particularly advantageously with methanol.
- the desorption with water which is advantageously heated to a temperature of 20 ° C to 60 ° C, is possible.
- the solvent is optionally then separated via a distillation of the carboxylic acid and / or the product is crystallized out.
- further purification steps such as activated carbon filtration and / or anion and / or cation exchange can be provided.
- the carboxylic acid to be separated off and to be purified is preferably selected from the group comprising hydroxycarboxylic acids and dicarboxylic acids.
- the hydroxycarboxylic acid is selected from the group comprising
- Malic acid glycolic acid, isocitric acid, mandelic acid, lactic acid, tartronic acid, tartaric acid, citric acid, ⁇ -hydroxybutyric acid, mevalonic acid and salicylic acid, and is preferably lactic acid.
- the dicarboxylic acid is selected from the group comprising oxalic acid, maleic acid, succinic acid, glutaric acid, Adipic acid, pimelic acid, suberic acid, fumaric acid and itaconic acid, and is preferably succinic acid.
- the present invention claims an apparatus for carrying out the method set forth in claim 1.
- Embodiment 1 is a diagrammatic representation of Embodiment 1:
- a fermentation broth containing exemplarily lactic acid, biomass and constituent parts of the substrate was continuously separated from the biomass by precoat filtration and microfiltration.
- the resulting broth contained 2% lactic acid.
- the lactic acid-containing permeate containing 2% is used in an adsorption-desorption experiment.
- An adsorbent resin which carries poly-4-vinylpyridine as active component and is crosslinked with divinylbenzene and polymerized into a spherical structure is used here.
- the lactic acid is to be seen here as an exemplary representative of a carboxylic acid. With the aid of the adsorber resin, the lactic acid is bound to the resin from the lactic acid solution. In a subsequent desorption step, the lactic acid is recovered. For desorption, 40 ° C. warm water was used here. The results can be found in the following Tab. 1.
- Tab. 1 Adsorption and desorption of lactic acid to an amino group-bearing adsorbent resin, wherein the desorption was carried out with water, having a temperature of 40 ° C:
- Table 1 shows a 6-fold adsorption-desorption cycle. 10 g of an adsorbent resin were used. It could be shown that a desorption of almost 100% is possible.
- the loading capacity is 0.54 g of lactic acid per 10 g of polymer when 40 ° C warm water is used for desorption. % Desorption is calculated to be 95% over the last 5 cycles.
- the first charge / discharge cycle shows a higher adsorption of 1.13 g of lactic acid and a reduced desorption. This can be explained by the fact that the resin must first be charged with a basic load.
- the impurities still contained interfere with a subsequent processing of the lactic acid, e.g. to polylactic acid.
- a subsequent processing of the lactic acid e.g. to polylactic acid.
- even more adsorption desorption cycles are necessary to achieve a desired product quality, since the other impurities partially adsorb to the column material.
- a larger number of adsorption columns would be necessary.
- Embodiment 2 is a diagrammatic representation of Embodiment 1:
- a process chain including nanofiltration as a fine cleaning is shown.
- a fermentation broth containing carboxylic acids such as lactic acid was produced by fermentation of microorganisms. At this time, the pH became between 6.0 and 7.3 held constant, without neutralization agent, such as NaOH, were added. This was achieved by continuously withdrawing fermentation broth and purifying it. For this purpose, it is necessary for an average productivity of lactic acid during the fermentation of 4 g / l / h and the specified pH range, the subsequent microfiltration of the process step a) and the nanofiltration of the process step b) be interpreted such that the volume of the permeate from the nanofiltration corresponds to 2 times the working volume of the fermenter.
- the fermentation broth exemplified by lactic acid, biomass and constituents of the substrate, was continuously separated from the biomass by precoat filtration and microfiltration.
- the resulting broth contained 2% lactic acid. It was ensured that the temperature and the pH correspond to the values in the fermentation carried out.
- the subsequent fine cleaning was carried out as nanofiltration. A membrane with a separation size of 200 Da was used. Care was taken that nanofiltration was carried out at a temperature equal to that of the fermentation, with a temperature difference of ⁇ 5 ° C being tolerated. It was worked here in a temperature range of 48 ° C to 52 ° C. Also, the pH of the fermentation, which ranges from 6 to 7.3, has been maintained.
- the retentate stream, at The nanofiltration obtained and containing the impurities can be returned to the fermentation again.
- the lactic acid-containing permeate containing 2% was used in an adsorption-desorption experiment.
- An adsorbent resin which carries poly-4-vinylpyridine as the active component and is crosslinked with divinylbenzene and polymerized into a spherical structure was used.
- the lactic acid is to be seen here as an exemplary representative of a carboxylic acid.
- the adsorber resin With the aid of the adsorber resin, the lactic acid is bound to the resin from the lactic acid solution.
- the lactic acid is recovered. For desorption, 40 ° C. warm water was used here. The results can be found in the following Tab. 1.
- Tab. 2 Adsorption and desorption of lactic acid to an amino group-bearing adsorbent resin, wherein the desorption was carried out with water, having a temperature of 40 ° C:
- Table 1 shows a 6-fold adsorption-desorption cycle. 10 g of an adsorbent resin were used. It could be shown that a desorption of almost 100% is possible. In summary it can be said that the loading capacity is 0.59 g of lactic acid per 10 g of polymer when 40 ° C warm water is used for desorption. The desorption in% is calculated over the last 5 cycles at 97%. The first charge / discharge cycle shows a higher adsorption of 1, 26 g lactic acid and a reduced desorption. This can be explained by the fact that the resin must first be charged with a basic load.
- Embodiment 3 is
- Embodiment 3 differs from Embodiment 2 in the choice of the desorbent.
- Embodiment 3 methanol was used as an example of an aliphatic alcohol. The results can be found in the following Tab. 3.
- Table 3 shows a 6-fold adsorption-desorption cycle.
- the loading capacity of the adsorber resin is 0.78 g of lactic acid per 10 g of polymer when methanol is used for desorption.
- The% desorption is calculated to be at least 100% over the last 5 cycles.
- the first loading / unloading cycle shows a higher adsorption of 1, 14 g of lactic acid and a reduced desorption. This can also be explained by the fact that the resin must first be charged with a basic load.
- Impurities that permanently damage the resin Possible components are including sugars, dyes and peptides.
- Embodiment 4 is a diagrammatic representation of Embodiment 4:
- Embodiment 4 differs from Embodiment 2 by an additional method step.
- a reverse osmosis (UO) was additionally applied to the NF. The results can be found in FIG. 1.
- Fig. 1 loading capacity after preconcentration of lactic acid
- Fig. 1 the amount of lactic acid adsorbed in g on 10 g of polymer is plotted against the concentration of lactic acid solution in g / L used to charge the column. From this graph it can be seen that the loading capacity increases with the lactic acid concentration. A concentration by a factor of 4.5 leads to an increase in loading to 2.5 times. Further concentration by other known from the prior art measures or a
- the additional process step requires much less resin for adsorption. Furthermore, the concentration of lactic acid after desorption is higher and thus the cost of further concentration lower.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12794869.3A EP2788310A1 (de) | 2011-12-09 | 2012-11-15 | Verfahren zur aufreinigung von carbonsäuren aus fermentationsbrühen |
BR112014013798A BR112014013798A2 (pt) | 2011-12-09 | 2012-11-15 | processo para a separação e para a purificação de ácidos carboxílicos em caldos de fermentação; e dispositivo para a realização de um processo |
US14/363,844 US9272976B2 (en) | 2011-12-09 | 2012-11-15 | Method for purifying carboxylic acids from fermentation broths |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011120632A DE102011120632A1 (de) | 2011-12-09 | 2011-12-09 | Verfahren zur Aufreinigung von Carbonsäuren aus Fermentationsbrühen |
DE102011120632.2 | 2011-12-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013083229A1 true WO2013083229A1 (de) | 2013-06-13 |
Family
ID=47278751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2012/004741 WO2013083229A1 (de) | 2011-12-09 | 2012-11-15 | Verfahren zur aufreinigung von carbonsäuren aus fermentationsbrühen |
Country Status (5)
Country | Link |
---|---|
US (1) | US9272976B2 (de) |
EP (1) | EP2788310A1 (de) |
BR (1) | BR112014013798A2 (de) |
DE (1) | DE102011120632A1 (de) |
WO (1) | WO2013083229A1 (de) |
Cited By (1)
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EP3290101A1 (de) * | 2016-09-05 | 2018-03-07 | Nanoscience for life GmbH & Co. KG | Verfahren zur herstellung stoffselektiver trennmembranen und deren verwendung |
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DE102016001070A1 (de) | 2015-02-06 | 2016-08-11 | Rwth Aachen | Verfahren zur Trennung organischer Dicarbonsäuren durch Adsorption hydrophober poröser Materialien |
EP3268099A1 (de) * | 2015-03-12 | 2018-01-17 | Novasep Process SAS | Verfahren zur reinigung einer organischen säure mit einem elektrodialysebehandlungsschritt |
JP2022545564A (ja) | 2019-08-28 | 2022-10-27 | ダニスコ・ユーエス・インク | メバロノラクトンを含むスキンケア組成物 |
EP3822356A1 (de) * | 2019-11-18 | 2021-05-19 | Corvay Bioproducts GmbH | Verfahren zur herstellung einer dicarbonsäure |
CN111138273A (zh) * | 2019-12-24 | 2020-05-12 | 上海凯赛生物技术股份有限公司 | 一种长链二元酸的精制工艺及系统 |
CN113880710B (zh) * | 2021-10-22 | 2023-10-20 | 万华化学集团股份有限公司 | 一种乳酸的纯化方法 |
US20230248677A1 (en) * | 2022-02-08 | 2023-08-10 | Visolis Technologies, Inc. | Novel highly sustainable compositions for modulation of gene expression in human skin, and methods of production thereof |
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---|---|---|---|---|
DE1274128B (de) | 1965-02-24 | 1968-08-01 | Rohm & Haas | Verfahren zum Anreichern bzw. Abtrennen von organischen Verbindungen mit stark heteropolaren Molekuelteilen |
DE3043766A1 (de) | 1979-11-21 | 1981-06-04 | Koei Chemical Co., Ltd., Osaka | Verfahren zur wiedergewinnung von carbonsaeuren |
EP0135728A1 (de) | 1983-08-04 | 1985-04-03 | Hoechst Aktiengesellschaft | Isolierung von enzymatisch erzeugten Carbonsäuren |
WO1993006226A1 (en) | 1991-09-13 | 1993-04-01 | Purdue Research Foundation | Fermentation process for producing lactic acid |
DE69006555T2 (de) | 1989-07-27 | 1994-08-25 | Michigan Biotech Inst | Reinigungs- und Trennverfahren für eine Carbonsäure. |
DE69015019T2 (de) | 1989-06-28 | 1995-07-20 | Michigan Biotech Inst | Verfahren zur Fermentation und Isolierung von Bernsteinsäure. |
DE69015233T2 (de) | 1989-03-17 | 1995-08-24 | Michigan Biotech Inst | Verfahren zur Herstellung und Reinigung von Bernsteinsäure. |
WO1996041021A1 (en) * | 1995-06-07 | 1996-12-19 | Chronopol, Inc. | Method and apparatus for the recovery and purification of organic acids |
WO1999019290A2 (en) | 1997-10-14 | 1999-04-22 | Cargill, Incorporated | Lactic acid processing; methods; arrangements; and, products |
US6137004A (en) * | 1991-03-14 | 2000-10-24 | Reilly Industries, Inc. | Processes for recovering citric acid |
DE19939630C2 (de) | 1999-08-20 | 2001-07-12 | Mg Technologies Ag | Verfahren zum Feinreinigen einer wässrigen Lösung, die eine fermentativ hergestellte organische Säure enthält |
EP0986532B1 (de) | 1997-06-06 | 2003-07-30 | Brussels Biotech | Verfahren zur reinigung von milchsäure |
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DE60028958T2 (de) | 1999-04-28 | 2007-02-08 | Tate & Lyle Ingredients Americas, Inc., Decatur | Verfahren zur herstellung organischer säuren und ihrer ester |
DE102007045701B3 (de) | 2007-09-24 | 2009-05-14 | Uhde Gmbh | Gewinnung von Milchsäure durch Fermentation und Extraktion mit Aminen |
DE102009019248A1 (de) | 2009-04-30 | 2010-11-04 | Uhde Gmbh | Isolierung von organischen Säuren aus Fermenterbrühe mit Hilfe chromatographischer Methoden |
WO2011082378A2 (en) * | 2009-12-31 | 2011-07-07 | Myriant Technologies Llc | Purification of succinic acid from the fermentation broth containing ammonium succinate |
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DE4420033C2 (de) * | 1994-06-08 | 1997-04-10 | Fraunhofer Ges Forschung | Verfahren zum Reinigen von Molkereiabwasser |
-
2011
- 2011-12-09 DE DE102011120632A patent/DE102011120632A1/de not_active Ceased
-
2012
- 2012-11-15 BR BR112014013798A patent/BR112014013798A2/pt not_active Application Discontinuation
- 2012-11-15 EP EP12794869.3A patent/EP2788310A1/de not_active Withdrawn
- 2012-11-15 WO PCT/EP2012/004741 patent/WO2013083229A1/de active Application Filing
- 2012-11-15 US US14/363,844 patent/US9272976B2/en not_active Expired - Fee Related
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DE1274128B (de) | 1965-02-24 | 1968-08-01 | Rohm & Haas | Verfahren zum Anreichern bzw. Abtrennen von organischen Verbindungen mit stark heteropolaren Molekuelteilen |
DE3043766A1 (de) | 1979-11-21 | 1981-06-04 | Koei Chemical Co., Ltd., Osaka | Verfahren zur wiedergewinnung von carbonsaeuren |
EP0135728A1 (de) | 1983-08-04 | 1985-04-03 | Hoechst Aktiengesellschaft | Isolierung von enzymatisch erzeugten Carbonsäuren |
DE69015233T2 (de) | 1989-03-17 | 1995-08-24 | Michigan Biotech Inst | Verfahren zur Herstellung und Reinigung von Bernsteinsäure. |
DE69015019T2 (de) | 1989-06-28 | 1995-07-20 | Michigan Biotech Inst | Verfahren zur Fermentation und Isolierung von Bernsteinsäure. |
DE69006555T2 (de) | 1989-07-27 | 1994-08-25 | Michigan Biotech Inst | Reinigungs- und Trennverfahren für eine Carbonsäure. |
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DE19939630C2 (de) | 1999-08-20 | 2001-07-12 | Mg Technologies Ag | Verfahren zum Feinreinigen einer wässrigen Lösung, die eine fermentativ hergestellte organische Säure enthält |
DE102004026152A1 (de) | 2004-05-28 | 2005-12-15 | Basf Ag | Fermentative Herstellung von Feinchemikalien |
WO2006124633A1 (en) | 2005-05-13 | 2006-11-23 | Cargill, Incorporated | Production of lactic acid |
DE102007045701B3 (de) | 2007-09-24 | 2009-05-14 | Uhde Gmbh | Gewinnung von Milchsäure durch Fermentation und Extraktion mit Aminen |
DE102009019248A1 (de) | 2009-04-30 | 2010-11-04 | Uhde Gmbh | Isolierung von organischen Säuren aus Fermenterbrühe mit Hilfe chromatographischer Methoden |
WO2011082378A2 (en) * | 2009-12-31 | 2011-07-07 | Myriant Technologies Llc | Purification of succinic acid from the fermentation broth containing ammonium succinate |
Non-Patent Citations (1)
Title |
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J. DAHLMANN ET AL., BRITISH POLYMER JOURNAL, vol. 23, 1990, pages 235 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3290101A1 (de) * | 2016-09-05 | 2018-03-07 | Nanoscience for life GmbH & Co. KG | Verfahren zur herstellung stoffselektiver trennmembranen und deren verwendung |
Also Published As
Publication number | Publication date |
---|---|
BR112014013798A8 (pt) | 2017-06-13 |
EP2788310A1 (de) | 2014-10-15 |
US20140371486A1 (en) | 2014-12-18 |
US9272976B2 (en) | 2016-03-01 |
BR112014013798A2 (pt) | 2017-06-13 |
DE102011120632A1 (de) | 2013-06-13 |
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