136results about "Lignin derivatives" patented technology

The invention relates to the technical field of production of potassium fulvate, in particular to a process for producing edible alcohol and co-producing potassium fulvate by fermenting beet. The method comprises the following steps: performing coarse crushing and fine crushing on beet to form slurry, adding squeezed water, and collecting into an adjusting tank; transferring the slurry into a conversion tank for biological conversion, then carrying out solid-liquid separation treatment to obtain juice and wet residues, and squeezing the wet residues; mixing the juice with the wine mother liquor, performing two-stage fermentation to obtain fermentation liquor, and concentrating the fermentation liquor to obtain edible alcohol and waste liquor; distilling the waste liquid and adding a fulvic acid transforming agent for fermentative degradation, and then evaporating to remove moisture and concentrating to generate a concentrated solution; lime milk and the concentrated solution are uniformly mixed and stirred for neutralization, and the neutralized concentrated solution is dehydrated and dried to generate potassium fulvic acid dry powder. According to the method disclosed by the invention, polysaccharide substances in the beet are subjected to sufficient enzymolysis by utilizing the biotransformation agent, and sugar contained in the beet is sufficiently released, so that the utilization rate of beet sugar is increased.

According to an example aspect of the present invention, there is provided an intumescent fire retardant composition comprising: an acid source comprising or consisting of ammonium phytate; and a carbon source selected from the group consisting of: carbohydrates, chemically modified lignins, tannin, and any combinations and derivatives thereof.

This invention provides a method for synthesizing thermoplastic polyurethane. [Solution] The present invention provides a method for synthesizing thermoplastic polyurethanes containing lignin-derived monomers, lignin-type compounds, or products obtained by the functionalization of each thereof in their structure. More specifically, the process relates to the use of 4-hydroxylalkylphenols and their derivatives as lignin-derived monomers or lignin-type compounds. These can act as chain extenders or become part of a polyol. The thermoplastic polyurethanes can be partially or completely bio-based.

The invention relates to methods of producing lignin epoxide adduct with thermoplastic properties. In particular the invention describes a method which can be performed under mild conditions, to obtain a lignin epoxide adduct with a low percentage of homopolymer of epoxide. The invention further relates to compositions and lignin epoxide adduct obtained using the described method.

A method for producing bio-oil from lignin, comprising the following steps: (a) extracting lignin into oligomers for 30 to 90 minutes, preferably 40 to 70 minutes, in the presence of at least one alcohol having 1 to 5 carbon atoms, preferably 1 to 2 carbon atoms, at the boiling point temperature of said alcohol, or, in the case of a mixture of alcohols, at the temperature of a higher boiling point alcohol, thereby obtaining a liquid phase comprising oligomers and at least one alcohol, and a solid phase comprising lignin substantially free of said oligomers; (b) operating under supercritical conditions in the presence of at least one alcohol having 1 to 5 carbon atoms, preferably 1 to 2 carbon atoms, at a temperature of 200°C to 300°C, preferably 220°C to 295°C, and at 40 bar to 170 bar, preferably 50 bar to 150 bar. Under bar pressure, the solid phase containing lignin substantially free of said oligomers obtained in step (a) is depolymerized for 5 to 150 minutes, preferably 10 to 130 minutes, to obtain: - (i) a gas phase; - (ii) a mixture comprising: an oil phase consisting of bio-oil, a liquid phase containing at least one alcohol, and a solid phase containing carbon residues (“char”), the oil phase consisting of bio-oil, and optionally unconverted lignin; (c) the oil phase consisting of bio-oil is recovered from the mixture (ii) obtained in step (b). The bio-oil obtained by the foregoing method can be advantageously used, for example, as an antioxidant or UV stabilizer, particularly as an antioxidant or UV stabilizer in biofuels, which can be used as is or blended with other fuels in automotive or aviation diesel engines. Furthermore, the bio-25 oil obtained by the foregoing method can be advantageously used as an antioxidant in, for example, vegetable oils and animal or plant fats, as bio-feedback materials to slow their rancidity during transport and storage.

The present invention relates to a deep eutectic solvent (DES) comprising at least one carboxylic acid which comprises at least two carboxylic acid functional groups and has a number of carbon atoms in the range of from 4 to 10; at least one alcohol which comprises at least two alcohol functional groups, and which is selected from the group consisting of alcohols having a number of carbon atoms in the range of from 2 to 12 carbon atoms, polyethylene glycol and polypropyleneglycol; and water in an amount of from 10 to 50 wt.% of the total weight of the deep eutectic solvent. It is also related to the use of these deep eutectic solvents of the invention, as solvents for solubilising lignin from a lignin material or for preparing a lignin prepolymer. Furthermore, it is related to a process for preparing a lignin prepolymer which involves the use of the deep eutectic solvents of the invention, as well as to the lignin prepolymer as such and its uses for producing films, coatings, insulating foams, adhesives, binders, composites or for fibre sizing or for radical curing.

The present invention relates to a method for preparing cross-linked lignin in the form of particles using hydrothermal treatment with a liquid made from black liquor, comprising lignin and a cross-linking agent or a precursor thereof, and having an electrical conductivity of more than 15 mS / cm, preferably more than 25 mS / cm to 400 mS / cm. The present invention also relates to cross-linked lignin produced using the above-mentioned method. The present invention also relates to cross-linked lignin particles having a glass transition temperature Tg of at least 160°C or no glass transition temperature and a STSA surface area of at least 10 m 2 / g. The present invention also relates to rubber articles, in particular industrial rubber articles or tires, comprising cross-linked lignin particles as filler.

The present invention is directed to a solid state binder composition, in particular for preparing mineral fiber products.

This invention relates to the field of biomass degradation technology, specifically to a ruthenium-based catalyst Ru@RuO2 supported by zirconium phosphate, its preparation method, and its application in catalyzing the hydrogenolysis of lignin. This invention is based on the in-situ reduction of elemental ruthenium to needle-like ruthenium oxide supported by amorphous zirconium phosphate, constructing a RuO2 / zirconium phosphate composite nanomaterial. This material can efficiently catalyze the hydrogenolysis of alkali-degraded lignin and model compounds such as α-O-4 and 4-O-5. Furthermore, the ruthenium nanoparticles generated from the in-situ reduction on ruthenium oxide exhibit high stability and can be reused multiple times.

The invention discloses a lignin pre-depolymerization strengthening method based on a supercritical fluid technology, which comprises the following steps: firstly, pretreating lignin powder by using a mixed solvent of supercritical carbon dioxide and an auxiliary agent at specific temperature and pressure, and then washing and drying by using an alcohol / ketone mixed solution; and then carrying out catalytic depolymerization on the pretreated lignin in supercritical ethanol or methanol fluid by using a metal supported catalyst taking molybdenum sulfide as a carrier. According to the method, through supercritical CO2 / auxiliary agent pretreatment, the compact structure of the lignin is effectively destroyed, active sites are introduced, the reaction rate and the product yield of subsequent catalytic depolymerization are remarkably increased, and an efficient and environment-friendly new way is provided for high-value utilization of the lignin.

The invention relates to the technical field of metal catalyst preparation, in particular to a nitrogen-doped carbon-loaded molybdenum-based monatomic catalyst and a preparation method and application thereof. The preparation method of the nitrogen-doped carbon-loaded molybdenum-based monatomic catalyst comprises the following steps: dissolving a carbon precursor and a template agent in deionized water, stirring to obtain a nitrogen-carbon precursor, then adding soluble molybdate, violently stirring, and then drying to obtain a molybdenum and nitrogen-carbon precursor solid mixture; then, a flash Joule heat technology is adopted, and the nitrogen-doped carbon-loaded molybdenum-based monatomic catalyst with a large number of wrinkled nanosheets and an excellent pore channel structure is synthesized under the coupling action of temperature and an electric field. The molybdenum-based monatomic prepared by the method has good activity in catalysis of hydrogen-free aqueous phase reforming of a lignin model compound and self-reforming hydrogenolysis of lignin.

The present invention relates to an oxidized sulfonated lignin scale inhibitor, the use thereof for inhibiting the formation of scale in oilfield applications, a method for inhibiting scale in oilfield applications, and a method for preparing the inventive oxidized sulfonated lignin scale inhibitor.

The present invention relates to an improved process for preparing an aqueous dispersion of lignin and the use of said suspension in the preparation of a resin.

The present invention relates to the field of extraction of lignin wherein lignin is separated into a primary lignin. In one aspect, the present invention concerns a method to extract a primary lignin from lignocellulosic biomass comprising lignin. By providing a lignocellulosic biomass and a mixture of water and alcohol in a reactor, maintaining a temperature between 110°C and 180°C in the reactor to allow at least a part of the lignin to be dissolved to form an extract. Adding water to the removed extract to allow a part of the dissolved lignin to precipitate forming a primary lignin and separate it from the solution. In another aspect, the present invention concerns an isolated lignin obtained by the method as a primary lignin.

The invention discloses a quercetin composite methyl blue light catalyst and a preparation method and application thereof, and relates to the technical field of photocatalyst preparation, and the preparation method comprises the following steps: S1, placing quercetin and methyl blue in a beaker, adding deionized water, then adding H2SO4 and absolute ethyl alcohol, and stirring to obtain a mixed solution; s2, transferring the mixed solution into a hydrothermal reaction kettle with a polytetrafluoroethylene lining for constant-temperature reaction; and S3, after the constant-temperature reaction is finished, cooling to room temperature, washing a reaction product with deionized water, and then drying and grinding the reaction product into powder. According to the photocatalyst disclosed by the invention, a stable compound structure is constructed by utilizing the dihydrogen-bond interaction between hydroxyl of quercetin and sulfo and amino of methyl blue, and the photocatalytic activity is remarkably enhanced. Under the irradiation of visible light, the prepared photocatalyst shows excellent lignite depolymerization performance, and humic acid and fulvic acid rich in hydroxyl and amino can be efficiently generated.

Described herein are devices and methods for the efficient and economic generation of lignin monomers from biomass. The provided devices and methods utilize reductive catalytic fractionation with an organic solvent to extract high-quality lignin from biomass and cleave specific lignin bonds to generate valuable lignin monomers with a relatively narrow product slate. Advantageously, the devices and methods described herein utilize solvent recycling, multiple solvolysis chambers with multiple biomass beds and / or physical agitation (e.g., use of a screw extruder) to reduce the amount of solvent required and increase economic efficiency and monomer yield.

Method to produce an upgraded oil using a lignin-rich feedstock, said method comprises the following steps: - providing a lignin-rich feedstock, wherein said lignin-rich feedstock comprises more than 60 wt% of lignin-based compounds obtained from delignification of biomass, where said lignin-based compounds are selected from the group consisting of: lignin-derived monomers, lignin-derived dimers, lignin-derived oligomers and combinations thereof; - providing an acidic composition having a pH of less than 1, said acidic composition comprising:  an acid selected from the group consisting of: sulfuric acid; an alkylsulfonic acid; and an arylsulfonic acid; and  an alcohol selected from the group consisting of C1-C8 linear alcohol and C3-C8 branched alcohol and mixtures thereof; - combining said lignin-rich feedstock with said acidic composition into a reaction mixture; - heating up said mixture to a temperature ranging from 25oC to 120oC; and - allowing sufficient time of reaction to convert at least a portion of said lignin-derived material into said at least one esterified lignin derivative; - separating said at least one esterified lignin derivative from said acidic composition; - performing a hydrodeoxygenation reaction on said at least one esterified lignin derivative, wherein the hydrodeoxygenation reaction is carried out in the presence of a hydrogen-rich source at a temperature ranging from 250oC to 400oC under a H2 pressure ranging from 15 to 50 bar, more preferably 35 bar, in the presence of a catalyst adapted for HDO reactions, for a period of time sufficient to result in an upgraded oil having a TAN of about 2.5 mg KOH / g and viscosity of 3.4 cP.

The present invention is directed to production of granular carbon, prepared from lignin. The process comprises the steps of providing agglomerated lignin, heating the agglomerated lignin to obtain thermally stabilized lignin and subjecting the thermally stabilized agglomerated lignin to heat treatment to obtain granular carbon.

The present invention relates to separation of lignin from an aqueous slurry containing lignocellulosic biomass material comprising providing the aqueous slurry having an initial pH level to at least one precipitation phase for precipitating lignin, performing said precipitation phase during a reaction time including adding at least one acidifier, wherein a decrease in the pH value of the aqueous slurry to a lower pH level is created, separating the lignin in a first separation phase, performing an acidification phase including, performing a re-slurry step including mixing lignin from the first separation phase with an acidifier to form an acidic slurry, establishing a reaction temperature in a range of 65 – 95 degrees Celsius, and performing a retention step including maintaining the acidic slurry at the reaction temperature for a reaction time period of 30 – 60 minutes, and separating the treated lignin content from the acidic slurry in a second separation phase.

The present invention relates to lignin comprising beta-O-4'units bound in position to one or more compounds of formula (I), such as phenol, catechol, resorcinol, hydroquinone, pyrogallol and / or guaiacol, a process for its preparation and its use. And lignin fragment 1.

It is disclosed a method for producing a lignin product, comprising the steps of: providing a soluble lignin-containing organic solution; providing an aqueous precipitant solution; adding the precipitant solution to the soluble lignin-containing organic solution to provide a mixture comprising precipitated lignin, mixing the mixture in a dynamic mixer at a speed of about 500 rpm to about 2000 rpm; separating and recovering the precipitated lignin product from the mixture.

Alkaline aerobic depolymerization of lignin in a permeable flowthrough reactor. Methods include flowing an aqueous reaction medium that includes lignin and a base through a lumen of an oxygen-permeable channel in the presence of oxygen gas to depolymerize the lignin to aromatic monomers.

The invention relates to an aqueous binder composition free of phenol and formaldehyde.

The present application belongs to the technical field of depolymerization separation, and particularly relates to a method for separating polyphenolic compounds from lignin depolymerization products, the polyphenolic compounds and applications thereof. The lignin depolymerization products are mixed with an extraction liquid for extraction, the extraction products are mixed with the extraction liquid for extraction, then the obtained upper extraction liquid is cooled for crystallization, and countercurrent chromatography separation is performed to remove phenol in the depolymerization liquid. On this basis, the polyphenolic compounds are obtained through high-pressure preparation separation technology. The polyphenolic compounds obtained by the present application are functional components, and are new antioxidant active compositions. The polyphenolic compounds have high free radical scavenging rate and excellent antioxidant activity. Meanwhile, the polyphenolic compounds are lignin polyphenolic nanomicelles with fluorescence performance. The micelles can obtain strong fluorescence under a relatively short excitation wavelength. The polyphenolic compounds also have excellent anticancer activity.

The present disclosure provides a method for preparing undiscolored lignin, the method comprising providing lignocellulosic plant material (10), combining the lignocellulosic plant material with a reagent solution (12) comprising one or more5 carboxylic acids comprising a thiol group and mixing to obtain a reaction mixture (14), reacting (16) the reaction mixture in heating, preferably at 100–120ºC for 2–4 hours, to release cellulose fibers (20) and to solubilize lignin, and recovering the solubilized lignin as undiscolored lignin (18). The present disclosure also provides undiscolored lignin (18). The present disclosure also provides products such as a0 coating composition, a composite product, a cosmetic product and a medical product comprising the undiscolored lignin (18).

The present disclosure relates to methods for the extraction of nano-sized lignin from lignocellulosic biomass using a deep eutectic solvent comprised of an organic salt and an organic acid.

This invention discloses a quercetin-methylene blue composite photocatalyst, its preparation method, and its application, relating to the field of photocatalyst preparation technology. The method includes the following steps: S1: Quercetin and methylene blue are placed in a beaker, deionized water is added, followed by H2SO4 and anhydrous ethanol, and the mixture is stirred to obtain a mixed solution; S2: The mixed solution is transferred to a hydrothermal reactor with a polytetrafluoroethylene liner for a isothermal reaction; S3: After the isothermal reaction, the mixture is cooled to room temperature, the reaction product is washed with deionized water, and then dried and ground into powder to obtain the final product. The photocatalyst of this invention utilizes the double hydrogen bond between the hydroxyl groups of quercetin and the sulfonic acid and amino groups of methylene blue to construct a stable composite structure, significantly enhancing its photocatalytic activity. Under visible light irradiation, the prepared photocatalyst exhibits excellent depolymerization performance in lignite, efficiently generating humic acid and fulvic acid rich in hydroxyl and amino groups.

The present invention relates to lignin fragments A comprising at least monomer units (I) and (II) wherein R1 is selected from the group consisting of methyl, ethyl, propyl, isopropyl and n-butyl, and wherein the lignin fragments A have an average aliphatic hydroxyl group content of more than 3 mmol / g.