318results about "Lignin derivatives" patented technology

The invention discloses a method for catalytically oxidizing lignin to depolymerize into an aviation oil intermediate by using a cellulose carbon aerogel supported copper nano-catalyst. Comprising the following steps: (1) dissolving cellulose powder into a mixed alkali solution of NaOH and urea, and stirring at low temperature to obtain a clear and transparent cellulose solution; and washing to be neutral to obtain well dispersed cellulose suspension. And (2) carrying out suction filtration molding, and freeze-drying for a period of time to obtain the cellulose aerogel. And (3) immersing in an ethanol solution of copper nitrate for ultrasonic treatment, and drying in a vacuum drying oven. And (4) carrying out high-temperature calcination in an N2 atmosphere to obtain a catalyst which is marked as Cu / CA. And (5) the catalyst can efficiently catalyze a Fenton-like reaction to oxidize a dimer model compound of lignin in acidic, neutral and alkaline environments to obtain products including benzoic acid, acetophenone, benzyl alcohol, phenol and the like, the required hydrogen peroxide concentration is low, and the catalyst has the advantages of simple process, high catalytic activity, low cost and the like, can be used for effectively degrading lignin to prepare aviation oil intermediates, and has wide application prospects. And repeated cyclic utilization is realized.

The invention belongs to the technical field of viscosity reduction in an oil reservoir development technology, and discloses a CO2-resistant lignin viscosity reducer and a preparation method and application thereof, and the CO2-resistant lignin viscosity reducer has a structure as shown in a formula (1). R is selected from H and at least one of a formula (2), R2 is alkylene of C1-C3, and R1, R3, R4 and R5 are the same or different and are respectively alkyl of C1-C18; the CO2-resistant lignin viscosity reducer can obviously reduce the viscosity of heavy oil; # imgabs0 #

The invention relates to the technical field of lignin separation and catalytic conversion, in particular to a method for separation and in-situ catalytic conversion of lignin in woody biomass, which comprises the following steps: (1) mixing the woody biomass, a catalyst and a reaction solvent, and performing catalytic reaction to obtain a liquid product and a solid product; wherein the catalyst comprises a tungsten element, a phosphorus element and a carrier; (2) evaporating the liquid product to obtain a reaction product and a regenerated solvent; and (3) contacting the reaction product with an extraction agent for extraction to obtain an oil-phase product containing the phenolic monomer and a water-phase product containing the saccharide derivative. According to the method provided by the invention, the lignin in the woody biomass can be converted into the monophenol aromatic compound with high selectivity, and multi-stage and high-value utilization of the biomass can be realized.

The invention discloses a method for preparing phenol by utilizing a biomass raw material, which comprises the following steps: 1) crushing biomass, adding the crushed biomass into a caustic alkali solution to carry out hemicellulose removal treatment, and carrying out solid-liquid separation to take a solid substance, so as to obtain hemicellulose-removed biomass; 2) adding the hemicellulose-removed biomass into an ethylene glycol-ferric chloride eutectic solvent for lignin extraction, then adding an acetone-water mixed solution, then carrying out solid-liquid separation, taking a liquid substance, adding water to precipitate the lignin, then carrying out solid-liquid separation, and taking a solid substance to obtain the lignin; and 3) pyrolyzing the lignin in a protective atmosphere to obtain lignin oil containing phenol. The method for preparing phenol from biomass raw materials has the advantages of simple operation, high phenol yield, high product purity, low energy consumption, safety, environmental protection and the like, and is suitable for large-scale industrial application.

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.

The present invention relates to a method for purifying lignin comprising the steps of: providing lignin in solid form, immersing the lignin in an acidic aqueous solution so as to remove metals from the lignin to the acidic aqueous solution and separating purified lignin from the acidic aqueous solution. The present invention also relates to lignin having a total metal content below 200 ppm. The purified lignin disclosed in the present invention may be further processed into carbon enriched materials.

The application discloses a method for separating non-condensed lignin and saccharide compounds from deconstructed lignocellulose. The lignocellulose is used as raw material, and a high-boiling alcohol aqueous solution such as dihydric alcohol or trihydric alcohol is added into an acid molten salt hydrate as a deconstruction reaction system. The acid molten salt hydrate hydrolyzes hemicellulose and cellulose in the lignocellulose into saccharide compounds, and the high-boiling alcohol in the system acts as a lignin dissolving agent and a structure protecting agent, so that the lignin is dissolved in the high-boiling alcohol. Then, water is added to precipitate the lignin, so that the non-condensed lignin and the saccharide compounds are separated. The biomass deconstruction method can effectively promote the full-component utilization of three components of lignocellulose, and has great industrial application potential.

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.

This biomass extract is a water-soluble biomass extract which is extracted from a biomass raw material containing lignin or hemicellulose, and contains more carbon than the carbon content of saccharides contained in the biomass raw material. This method for producing a biomass extract comprises: heating and pulverizing a biomass raw material to prepare a biomass pulverized product; and extracting a biomass extract from the biomass pulverized product with water.

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.

Provided are compositions and processes concerning efficient downstream processing of products derived from organic acids pretreatment of plant materials.

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.

In general, the present invention relates to lignin-derived monomers, as well as polymers prepared with these lignin-derived monomers. Furthermore, the invention relates to methods to prepare these monomers from feedstock rich in lignin, such as lignocellulosic biomass, as well as methods to prepare polymers with the obtained monomers.

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.

The application discloses a method for efficiently separating and utilizing whole components of wood fiber raw materials, and belongs to the field of wood fiber raw material utilization. The application utilizes a binary solid acid-water solvent system composed of dilute sulfuric acid and salicylic acid to pretreat wood fiber raw materials, so that hemicellulose and lignin in the wood fiber raw materials can be effectively removed at a lower pretreatment temperature, the specific surface area and porosity of the raw materials are improved, and the materials are easy to be hydrolyzed by cellulase, and the materials can be prepared into wood nanofibers after treatment; hemicellulose dissolved in the reaction solution is prepared into furfural through dehydration reaction; and the reaction solution can be recovered into lignin by simple water dilution. Through the combined use of the two groups of solid acids, the lignin is not only effectively separated from the raw materials under the mild conditions, but also selectively degraded hemicellulose, and the lignin is protected, so that the utilization rate of the three components of the wood fiber raw materials is effectively improved.

The present application belongs to the field of separation of agroforestry biomass components, and provides a method for subcritical hydrolysis and alkaline DES treatment of castor straw fiber to hydrolyze associated oligomeric xylose and micro-nano lignin. The subcritical hydrolysis method is used to treat castor straw raw materials to obtain a large amount of oligomeric xylose, a small amount of micro-nano low molecular weight lignin and a hydrolysis residue rich in cellulose and lignin; then the hydrolysis residue is treated with alkaline deep eutectic solvent (DES) to obtain a slurry rich in cellulose and micro-nano high aryl ether bond lignin. Finally, the slurry rich in cellulose is enzymatically hydrolyzed by biotechnology to obtain high-yield glucose products. The present application integrates subcritical hydrolysis reaction and alkaline DES treatment technology, and can obtain various high-value-added products of castor straw biomass under mild reaction conditions, thereby providing technical support for the value-added of castor industry and the utilization of castor straw resources.

The present invention discloses a halogen-modified nickel-aluminum hydrotalcite, a preparation method thereof, and an application thereof in the catalytic hydrogenation of lignin. A water-soluble nickel salt, a water-soluble aluminum salt, an alkali precipitating agent and water are mixed and then subjected to a hydrothermal reaction. The hydrothermal reaction product is first calcined in an air atmosphere and then calcined in a reducing atmosphere to obtain a nickel-aluminum hydrotalcite. The nickel-aluminum hydrotalcite is mixed with a halogenated aromatic hydrocarbon and an organic solvent and then subjected to a solvothermal reaction to obtain the halogen-modified nickel-aluminum hydrotalcite. The halogen-modified nickel-aluminum hydrotalcite is applied to the catalytic hydrodeoxygenation reaction of lignin compounds and / or aryl ether compounds to synthesize phenolic compounds, showing high catalytic selectivity and high yield. Moreover, the halogen-modified nickel-aluminum hydrotalcite can be recovered and separated by magnetic separation and can be reused multiple times, greatly reducing its use cost.

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 application discloses a method for co-production of lactic acid, xylitol and lignin from lignocellulose raw materials, and utilizes lignocellulose as raw materials to co-produce lactic acid, xylitol and lignin, which is beneficial to guarantee food safety, realize green and low-carbon development, solve the environmental problems caused by straw burning, and increase the income of farmers, and has good social and environmental benefits.

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 invention is directed to compositions and processes concerning efficient downstream processing of products derived from organic acids pretreatment of plant materials.