WO2015075290A1 - Nuevo procedimiento de despolimerizacion de la lignina - Google Patents
Nuevo procedimiento de despolimerizacion de la lignina Download PDFInfo
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- WO2015075290A1 WO2015075290A1 PCT/ES2014/070854 ES2014070854W WO2015075290A1 WO 2015075290 A1 WO2015075290 A1 WO 2015075290A1 ES 2014070854 W ES2014070854 W ES 2014070854W WO 2015075290 A1 WO2015075290 A1 WO 2015075290A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lignin
- black liquor
- procedure according
- liquid phase
- depolymerization
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 229920005610 lignin Polymers 0.000 title claims abstract description 40
- 239000000047 product Substances 0.000 claims abstract description 21
- 239000002028 Biomass Substances 0.000 claims abstract description 14
- 239000007791 liquid phase Substances 0.000 claims abstract description 14
- 239000011541 reaction mixture Substances 0.000 claims abstract description 12
- 238000011282 treatment Methods 0.000 claims abstract description 11
- 239000002244 precipitate Substances 0.000 claims abstract description 10
- 239000002253 acid Substances 0.000 claims abstract description 8
- 238000010335 hydrothermal treatment Methods 0.000 claims abstract description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 18
- 238000000605 extraction Methods 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 9
- 238000001704 evaporation Methods 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 238000004587 chromatography analysis Methods 0.000 claims description 3
- 239000003960 organic solvent Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 abstract description 8
- HFLGBNBLMBSXEM-UHFFFAOYSA-N 4-Ethyl-1,2-benzenediol Chemical compound CCC1=CC=C(O)C(O)=C1 HFLGBNBLMBSXEM-UHFFFAOYSA-N 0.000 abstract description 6
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 abstract description 6
- PGSWEKYNAOWQDF-UHFFFAOYSA-N 3-methylcatechol Chemical compound CC1=CC=CC(O)=C1O PGSWEKYNAOWQDF-UHFFFAOYSA-N 0.000 abstract description 4
- ZBCATMYQYDCTIZ-UHFFFAOYSA-N 4-methylcatechol Chemical compound CC1=CC=C(O)C(O)=C1 ZBCATMYQYDCTIZ-UHFFFAOYSA-N 0.000 abstract description 3
- 150000001896 cresols Chemical class 0.000 abstract description 3
- 125000003118 aryl group Chemical group 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 30
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- 239000007787 solid Substances 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 235000011437 Amygdalus communis Nutrition 0.000 description 4
- 241000220304 Prunus dulcis Species 0.000 description 4
- 235000020224 almond Nutrition 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 4
- 239000012074 organic phase Substances 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 239000008346 aqueous phase Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000622 liquid--liquid extraction Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000000638 solvent extraction Methods 0.000 description 3
- LFVCJQWZGDLHSD-UHFFFAOYSA-N 1-(4-hydroxy-3-methoxyphenyl)propan-2-one Chemical compound COC1=CC(CC(C)=O)=CC=C1O LFVCJQWZGDLHSD-UHFFFAOYSA-N 0.000 description 2
- KLIDCXVFHGNTTM-UHFFFAOYSA-N 2,6-dimethoxyphenol Chemical compound COC1=CC=CC(OC)=C1O KLIDCXVFHGNTTM-UHFFFAOYSA-N 0.000 description 2
- RGHHSNMVTDWUBI-UHFFFAOYSA-N 4-hydroxybenzaldehyde Chemical compound OC1=CC=C(C=O)C=C1 RGHHSNMVTDWUBI-UHFFFAOYSA-N 0.000 description 2
- DFYRUELUNQRZTB-UHFFFAOYSA-N apocynin Chemical compound COC1=CC(C(C)=O)=CC=C1O DFYRUELUNQRZTB-UHFFFAOYSA-N 0.000 description 2
- 150000001491 aromatic compounds Chemical class 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 2
- LHGVFZTZFXWLCP-UHFFFAOYSA-N guaiacol Chemical compound COC1=CC=CC=C1O LHGVFZTZFXWLCP-UHFFFAOYSA-N 0.000 description 2
- 239000010903 husk Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012691 depolymerization reaction Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229960001867 guaiacol Drugs 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002029 lignocellulosic biomass Substances 0.000 description 1
- 238000004811 liquid chromatography Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 239000006108 non-alkaline-earth borosilicate glass Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 150000002989 phenols Chemical group 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- MWOOGOJBHIARFG-UHFFFAOYSA-N vanillin Chemical compound COC1=CC(C=O)=CC=C1O MWOOGOJBHIARFG-UHFFFAOYSA-N 0.000 description 1
- FGQOOHJZONJGDT-UHFFFAOYSA-N vanillin Natural products COC1=CC(O)=CC(C=O)=C1 FGQOOHJZONJGDT-UHFFFAOYSA-N 0.000 description 1
- 235000012141 vanillin Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07G—COMPOUNDS OF UNKNOWN CONSTITUTION
- C07G1/00—Lignin; Lignin derivatives
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/004—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by obtaining phenols from plant material or from animal material
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C27/00—Processes involving the simultaneous production of more than one class of oxygen-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/005—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by obtaining phenols from products, waste products or side-products of processes, not directed to the production of phenols, by conversion or working-up
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/50—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions decreasing the number of carbon atoms
- C07C37/52—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions decreasing the number of carbon atoms by splitting polyaromatic compounds, e.g. polyphenolalkanes
- C07C37/54—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions decreasing the number of carbon atoms by splitting polyaromatic compounds, e.g. polyphenolalkanes by hydrolysis of lignin or sulfite waste liquor
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/68—Purification; separation; Use of additives, e.g. for stabilisation
- C07C37/70—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment
- C07C37/72—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by liquid-liquid treatment
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/18—Preparation of ethers by reactions not forming ether-oxygen bonds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/34—Separation; Purification; Stabilisation; Use of additives
- C07C41/38—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/56—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds from heterocyclic compounds
- C07C45/57—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds from heterocyclic compounds with oxygen as the only heteroatom
- C07C45/59—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds from heterocyclic compounds with oxygen as the only heteroatom in five-membered rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
- C07C45/67—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
- C07C45/673—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by change of size of the carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/80—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
Definitions
- the present invention relates to a new lignin depolymerization process that starts from a black liquor that contains it from biomass delignification.
- the solid lignin is obtained from biomass in general, which is subjected to a paste stage, from which a black liquor (or black liquor) is obtained as a byproduct, to which is added an acid that causes lignin to precipitate. .
- the lignin precipitate is isolated, and the resulting precipitated solid lignin is subjected to a depolymerization process.
- Figure 1 Schematic representation of an embodiment of the process for obtaining a black liquor with depolymerized lignin (9) from biomass (1) (for example: almond shell)
- Figure 2 Schematic representation of the treatment of depolymerized lignin (9) to obtain the phenolic products (18).
- Figure 3 represents the chromatogram obtained by gas chromatography-mass spectrometry (GC / MS) analysis of oil obtained in Example 1 with NaOH.
- Figure 4 represents the chromatogram obtained by gas chromatography-mass spectrometry (GC / MS) analysis of oil obtained in Example 1 with KOH.
- the invention relates to a process for depolymerization of lignin comprising the following steps:
- the type of biomass that can be subjected to this process is lignocellulosic biomass containing, among other polymers, lignin.
- Lignin is a phenolic macromolecule whose structure is not yet perfectly elucidated. It is present among the cell walls of numerous plants, specifically wood, to which they confer rigidity.
- the biomass usable in the present invention can be derived from wood, green waste in general, or straw for example. In a particular embodiment it comes from the nutshell, such as the almond shell. Lignin is available in black liquors that result as by-products of biomass delignification treatments, for example, that which takes place during the production of paper to obtain cellulose (paper pulp) that generates these by-products also called black liquors or from the production of second generation bioethanol.
- Biomass delignification is a process known in the state of the art that consists in performing an alkaline treatment of the biomass, preferably using sodium hydroxide or potassium hydroxide in a typical concentration of 15% by weight based on the weight of solution used in delignification (see Figure 1, where (1) represents the biomass, (2) the delignification stage).
- a solid to liquid ratio of 1: 10 by weight is used, for example, and is autoclaved at 121 e C.
- the product that is produced from the delignification is generally filtered first with a metal mesh, and a cloth filter then to separate any solid residue from the liquid phase where the lignin (black liquor) is dissolved (see Figure 1, (3) where this filtering stage is schematically represented, (5) the delignified paste, and (4) the resulting black liquor).
- the black liquor (4) is concentrated by any conventional technique ( Figure 1, (6)). In a particular embodiment it is done by evaporation either at atmospheric pressure or by applying vacuum and temperature, for example using a rotary evaporator with a water bath. Typically the concentration is done at 60 e C and vacuum of 0.02MPa.
- the concentration of the black liquor (4) is carried out until the initial volume of the liquor is reduced (see (7) in Figure 1, which represents the concentrated liquor).
- the volume reduction can be variable. Preferably it should be carried out, preventing lignin from precipitating.
- the concentration of the black liquor is carried out until the initial volume is reduced by half. In this sense, the inventors have observed that in this way a very good depolymerization performance is obtained and, on the other, excessive energy expenditure is avoided in further concentrating the black liquor, which entails only a small additional improvement in performance.
- the hydrothermal treatment to which the black liquor is subjected is a conventional treatment well known to a person skilled in the art. During it the depolymerization of lignin takes place. This stage (iii) is represented in Figure 1, by element (8) after which (9) is obtained: a reaction mixture.
- This treatment is generally carried out in the presence of a base, at a temperature between 250-500 and C, and high pressure, generally between 5-30 MPa. In a preferred embodiment according to the present invention, the hydrothermal treatment is carried out at 300 e C, 9 MPa and under continuous stirring. During this treatment the lignin is depolymerized, and a reaction mixture containing the depolymerized lignin is obtained from which it is possible to separate the products obtained. Depolymerization times are usually between 30 minutes and 2 hours depending for example on the depolymerization conditions.
- an acid such as hydrochloric acid, sulfuric acid or a mixture of both to the reaction mixture ( Figure 2, (10)). It is added in an amount that allows to raise a pH value of 1. At this pH value the inventors have observed that total precipitation of all the residue that is formed in the depolymerization reaction is achieved. The pH can be adjusted to a value greater than 1 but in that case the subsequent liquid-liquid extraction is difficult, since it has been observed that a precipitate appears.
- the step of separating the precipitate from the liquid phase is carried out, for example by filtration, although any other conventional separation means can be used. In a particular embodiment the filtration is done using a filter with a pore diameter of 7-12 ⁇ .
- (1 1) represents the acidified reaction mixture, (3) the filtering stage, (12) the precipitate and (13) the liquid phase.
- the liquid phase (13) separated in the previous stage is subjected to an extraction stage of the depolymerization products (14).
- the extraction gives rise to an aqueous phase (16) and an organic phase (15).
- the extraction is preferably done with ethyl acetate, since it is most suitable for dissolving the monomers formed, although other organic solvents such as diethyl ether, vinyl acetate or n-butyl acetate can also be used.
- the process of the invention further comprises recovering the depolymerization products.
- Recovery is done through the steps of: (a) evaporating the solvent from the phase organic liquid resulting from the extraction; (b) resuspend the organic oil resulting from step (a) in an organic solvent; and (c) subject the resulting suspension to chromatography separation.
- Evaporation (schematized in (17), Figure 2) is performed for example in a rotavapor at a typical temperature and vacuum and 50 C (for example 0.02 MPa) until complete removal of the solvent used in the extraction liquid- liquid.
- the resulting isolated oil (without solvent) (18) is weighed to know the yield and resuspended (dissolved) in the same solvent used in the extraction, preferably in ethyl acetate, [but of high efficiency Liquid Chromatography grade (HPLC)].
- the suspension is then subjected to chromatography, for example gas chromatography, to separate the present compounds.
- Figure 1 schematically represents the steps of the process of the invention (i) to (iii).
- the biomass that in (2) is subjected to alkaline delignification treatment described above.
- the resulting product is filtered in (3) giving rise to delignified paste (5), and a black liquor (4).
- the black liquor is concentrated according to step (ii) of the process of the invention in (6), and then the concentrated liquor (7) is subjected to depolymerization (step (iii) of the process of the invention), represented in (8 ), to give the reaction mixture represented in (9).
- Figure 2 represents the continuation of the process where the reaction mixture (9) is acidified according to step (iv) of the process of the invention in (10), to yield an acidified mixture (1 1) which is subjected to a stage of filtered (3), to give rise to a solid precipitate (12) and a liquid phase (13) separated according to step (v) of the process of the invention.
- the liquid-liquid extraction, step (vi) of the process of the invention is represented as (14) gives rise to an aqueous phase (16) and an organic phase (15). From this phase, for example, by evaporation of the solvent in (17) an oil is obtained with the depolymerization products (18).
- the process of the invention is cheaper, and more interesting from the environmental point of view as mentioned above. Allows output to a byproduct industrial, black liquor, and its revaluation by obtaining a mixture of organic compounds of high added value that can be used in numerous industries and applications. Examples
- the 50 grams of ground almond husk were then placed in a 1 liter vessel made of borosilicate glass 3.3 according to DIN EN ISO 4796-1 together with 500 grams of a 15% KOH solution by weight.
- the delignification process was carried out in an autoclave for 90 min, at a temperature of 121 e C and a pressure of 0.2 MPa.
- the reaction mixture was filtered first with a metal mesh (hole size of 2 mm) and then with a cloth filter to separate the solid residue from the black liquor where the lignin was dissolved. Thereafter, the black liquor was concentrated to reduce the volume by half using a rotary evaporator at 60 C and in a vacuum atmosphere (0.02 MPa). Once the liquor was concentrated, the depolymerization process was performed.
- the depolymerization process was carried out as follows. 30 grams of the concentrated liquor were introduced into a pressure steel reactor. The conditions were: 300 e C, 80 min, 9 MPa and continuous stirring. Once the process of depolymerization of the lignin contained in the black liquor was carried out, the products were separated.
- the reaction mixture obtained after the depolymerization process with HCI was acidified until pH 1 was reached.
- a precipitate (residue) was produced, which was removed by filtration with a filter paper with a pore diameter of 7-12 ⁇ .
- a liquid-liquid extraction with ethyl acetate was performed. This extraction process was carried out until when adding ethyl acetate no change in color was observed in the solvent, that is, no more products were extracted from the aqueous phase. After this extraction process, the phenolic products derived from lignin were in the organic phase.
- This organic phase was subjected to an evaporation process to remove the solvent and isolate the depolymerization products of lignin. Evaporation is performed in a rotary evaporator at 50 e C and in a vacuum atmosphere (0.02 MPa).
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Botany (AREA)
- Compounds Of Unknown Constitution (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/038,381 US20160289256A1 (en) | 2013-11-22 | 2014-11-18 | Novel method for the depolymerisation of lignin |
ES14863702T ES2743764T3 (es) | 2013-11-22 | 2014-11-18 | Método novedoso de despolimerización de la lignina |
EP14863702.8A EP3072874B1 (en) | 2013-11-22 | 2014-11-18 | Novel method for the depolymerisation of lignin |
BR112016011708-5A BR112016011708B1 (pt) | 2013-11-22 | 2014-11-18 | Método para despolimerização da lignina |
DK14863702.8T DK3072874T3 (da) | 2013-11-22 | 2014-11-18 | Hidtil ukendt fremgangsmåde til depolymerisering af lignin |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ESP201331705 | 2013-11-22 | ||
ES201331705A ES2539651B1 (es) | 2013-11-22 | 2013-11-22 | Nuevo procedimiento de despolimerizacion de la lignina |
Publications (1)
Publication Number | Publication Date |
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WO2015075290A1 true WO2015075290A1 (es) | 2015-05-28 |
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PCT/ES2014/070854 WO2015075290A1 (es) | 2013-11-22 | 2014-11-18 | Nuevo procedimiento de despolimerizacion de la lignina |
Country Status (7)
Country | Link |
---|---|
US (1) | US20160289256A1 (es) |
EP (1) | EP3072874B1 (es) |
BR (1) | BR112016011708B1 (es) |
DK (1) | DK3072874T3 (es) |
ES (2) | ES2539651B1 (es) |
PT (1) | PT3072874T (es) |
WO (1) | WO2015075290A1 (es) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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EP3502118A1 (en) | 2017-12-22 | 2019-06-26 | Universidad De Valladolid | Ultra-fast lignin depolymerization process |
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CN113999123A (zh) * | 2021-09-30 | 2022-02-01 | 南京林业大学 | 一种利用造纸黑液制备多巴胺类物质的方法及设备 |
CN115970701B (zh) * | 2021-10-14 | 2024-07-19 | 淮阴师范学院 | 一种木质素的资源化利用方法 |
CN116837655A (zh) * | 2023-08-01 | 2023-10-03 | 广西大学 | 一种从造纸稀黑液中高效提取生物油、木质素和回收碱的方法 |
Citations (4)
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US2220624A (en) | 1939-07-15 | 1940-11-05 | Henry A Wallace | Process for the hydrogenation of lignin and waste pulp liquors and the products thereof |
US5807952A (en) | 1994-09-19 | 1998-09-15 | Midwest Research Institute | Process for producing phenolic compounds from lignins |
US5959167A (en) | 1997-08-25 | 1999-09-28 | The University Of Utah Research Foundation | Process for conversion of lignin to reformulated hydrocarbon gasoline |
US20130066116A1 (en) | 2010-03-18 | 2013-03-14 | Institut Technologique Fcba | Method for the depolymerization of lignocellulosic biomass |
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US8940129B2 (en) * | 2010-12-30 | 2015-01-27 | Uop Llc | Process for reducing one or more insoluble solids in a black liquor |
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2014
- 2014-11-18 DK DK14863702.8T patent/DK3072874T3/da active
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US2220624A (en) | 1939-07-15 | 1940-11-05 | Henry A Wallace | Process for the hydrogenation of lignin and waste pulp liquors and the products thereof |
US5807952A (en) | 1994-09-19 | 1998-09-15 | Midwest Research Institute | Process for producing phenolic compounds from lignins |
US5959167A (en) | 1997-08-25 | 1999-09-28 | The University Of Utah Research Foundation | Process for conversion of lignin to reformulated hydrocarbon gasoline |
US20130066116A1 (en) | 2010-03-18 | 2013-03-14 | Institut Technologique Fcba | Method for the depolymerization of lignocellulosic biomass |
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TOLEDANO, A. ET AL.: "Process for olive tree pruning lignin revalorisation", CHEMICAL ENGINEERING JOURNAL, 2012, vol. 193, 15 June 2012 (2012-06-15), pages 396 - 403, XP028493155 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3502118A1 (en) | 2017-12-22 | 2019-06-26 | Universidad De Valladolid | Ultra-fast lignin depolymerization process |
WO2019120956A1 (en) | 2017-12-22 | 2019-06-27 | Universidad De Valladolid | Ultra-fast lignin depolymerization process |
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ES2539651A1 (es) | 2015-07-02 |
BR112016011708B1 (pt) | 2020-12-15 |
US20160289256A1 (en) | 2016-10-06 |
EP3072874A4 (en) | 2017-07-12 |
ES2539651B1 (es) | 2016-01-12 |
DK3072874T3 (da) | 2019-09-02 |
EP3072874A1 (en) | 2016-09-28 |
ES2743764T3 (es) | 2020-02-20 |
PT3072874T (pt) | 2019-09-16 |
EP3072874B1 (en) | 2019-05-29 |
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