43 results about "Kraft lignin" patented technology

The invention provides a material for removing sodium ions in saline-alkali soil and a preparation method, and relates to the field of sodium ion adsorbents, the preparation method comprises the following steps: (1) lignin modification: under a water bath condition, dissolving sulfate lignin in a mixed solution of analytically pure acetic acid and 30% hydrogen peroxide, then adding ferric chloride, reacting for 1.5-2.5 hours, diluting with distilled water by 7-8 times, centrifuging and washing to obtain modified lignin; drying to obtain oxidized lignin; (2) hydrogel synthesis: mixing and stirring the oxidized lignin and analytically pure acrylic acid, adding a cross-linking agent and an initiator, and reacting in a drying oven at 65-75 DEG C for 1.5-2.5 hours to form a sodium ion adsorption material with a porous interpenetrating network structure; by modifying the lignin, particularly introducing more hydroxyl and carboxyl groups, the performance of the lignin in the application of adsorbing ions, preparing hydrogel and the like can be improved.

To provide alternative thermoplastic expandable microspheres whose thermoplastic polymeric shell is at least partially derived from a sustainable source, a method for preparing the microspheres, and use of the microspheres.SOLUTION: There are provided thermally expandable microspheres comprising a polymeric shell surrounding a hollow core, wherein the hollow core comprises a blowing agent, and the polymeric shell comprises isolated lignin. The isolated lignin preferably comprises Kraft lignin such as acetylated Kraft lignin. A method for preparing thermally expandable microspheres comprising a polymeric shell surrounding a hollow core comprises the steps of (i) preparing a mixture comprising the isolated lignin and the blowing agent in a solvent, and (ii) spray-drying the mixture obtained in step (i) to obtain thermally expandable microspheres.SELECTED DRAWING: Figure 1

The present invention discloses a bonding method for a high-strength plywood with a low sizing amount based on a lignin formaldehyde-free adhesive, belonging to the technical field of adhesives. In the present invention, a lignin-based formaldehyde-free adhesive is used to bond veneers, and the single-sided sizing amount is not more than 80 g / m<supgt;2< / supgt>. After hot pressing and curing, the bonding strength of the obtained high-strength plywood is not less than 0.7 MPa; the lignin-based formaldehyde-free adhesive is prepared by separating and treating lignocellulosic raw materials or kraft lignin with a mixed solution. The adhesive of the present invention can reach a dry strength of 0.9 - 1.3 MPa and a class II wet strength of 0.8 - 1.0 MPa after bonding three-layer poplar veneers; the elastic modulus and static bending strength after bonding five-layer plywood are significantly higher than 5500 MPa and 32 MPa; the plywood manufactured by the method of the present invention far exceeds the plywood bonded with industrial urea-formaldehyde resin glue, and the bonding strength is equivalent to that of industrial-grade phenolic-bonded plywood.

[Problem] To provide a thermosensitive recording medium having an excellent corrosion resistance of a thermal head when printing, as well as good for the environment using kraft lignin as a color developing agent. [Means to solve the Problem] A thermosensitive recording medium, comprising: a thermosensitive recording layer containing a colorless or pale colored electron donating leuco dye and an electron accepting color developing agent on a substrate, wherein the thermosensitive recording layer contains a kraft lignin as the electron accepting color developing agent, and the kraft lignin contains almost no hydrogen sulfide or contains only 400 ppm at most.

A digester additive formulation includes a combination of phenyl tetracarboxylic acid or a derivative or salt thereof, and a macromolecule polymer. The digester additive formulation is as an additive for a kraft process for production of pulp from raw materials, such as wood chips. When used in the kraft pulping process, the digester additive formulation improves viscosity of the resulting pulp and increases pulp yield.

The present invention provides a material and a preparation method for removing sodium ions from saline-alkali land, which relates to the field of sodium ion adsorbents and comprises the following steps: (1) modifying lignin: dissolving sulfate lignin in a mixed solution of analytically pure acetic acid and 30% hydrogen peroxide under water bath conditions, adding ferric chloride, reacting for 1.5-2.5 hours, diluting 7-8 times with distilled water, centrifuging, washing, and drying to obtain oxidized lignin; (2) synthesizing hydrogel: mixing oxidized lignin with analytically pure acrylic acid, adding a crosslinking agent and an initiator, and reacting in an oven at 65-75°C for 1.5-2.5 hours to form a sodium ion adsorption material with a porous interpenetrating network structure; the present invention can improve the performance of lignin in applications such as adsorbing ions and preparing hydrogels by modifying lignin, especially introducing more hydroxyl and carboxyl groups.

To provide a compatibilizer for bioasphalt compositions that is capable of enhancing the compatibility between a lignin component and asphalt in the bioasphalt compositions.SOLUTION: The present invention provides a compatibilizer for a bioasphalt composition, comprising a lignin derivative compound that includes: structural unit (I): a structural unit derived from a lignin-based compound, and structural unit (II): a structural unit derived from an aromatic water-soluble compound including at least an aromatic water-soluble compound having an alkylene oxide chain, and a bioasphalt composition comprising asphalt, a lignin component such as kraft lignin, and the compatibilizer.SELECTED DRAWING: None

The roofing bitumen composition comprises 9 to 60 percent of a material selected from the group consisting of paving-grade bitumen feedstock, low-MW polyolefins, and kraft lignin, recycled fibrous materials, bitumen recovered from recycled asphalt shingles (RAS), recycled asphalt pavement (RAP), recycled tire rubber (RTR), and combinations thereof. This roofing bitumen composition has a calculated scope 3 carbon footprint reduction of about 5% to 60%.

The present invention is directed to fractionation of crude tall oil, which originates from the Kraft process black liquor. In the method according to the present invention, at least two strongly basic anion exchange resins are used to efficiently separate fractions from the crude tall oil.

The invention provides an ultrathin self-supporting composite solid electrolyte membrane, a preparation method thereof and a solid-state battery, and relates to the field of solid-state batteries. The method comprises the following steps: under an alkaline condition, mixing sulfate lignin, formaldehyde and water, and carrying out hydroxymethyl reaction to obtain a product after hydroxymethyl reaction; mixing the hydroxymethyl reaction product with a sulfonating agent, and carrying out sulfonation reaction to obtain sulfonated lignin; the preparation method comprises the following steps: mixing sulfonated lignin, a conductive ionic polymer, a lithium salt, a fast ionic conductor and a first solvent to obtain a spinning precursor liquid, and carrying out electrostatic spinning on the spinning precursor liquid to obtain a high-ionic-conductivity cellulose-based support membrane; and mixing the sulfide solid electrolyte, the glue solution and a second solvent to obtain sulfide slurry, mixing the sulfide slurry and the high-ion-conductivity cellulose-based supporting membrane, and carrying out vacuum impregnation-drying and rolling to obtain the ultrathin self-supporting sulfide electrolyte membrane. The method is simple to operate and easily available in raw materials.

The APPARATUSES, METHODS AND SYSTEMS FOR APPARATUSES, METHODS AND SYSTEMS FOR YIELD INCREASE IN A KRAFT COOKING PLANT present synergies for at least two parallel cooking plants, e.g., one producing dissolving pulp in a prehydrolysis kraft process, and the other producing kraft pulp by kraft pulping process, which may facilitate increased cooking yield in the kraft cooking plant producing kraft pulp by recovering the hemicelluloses solubilized in the acidic hydrolysate of the prehydrolysis kraft process. In some implementations, there may be no cold caustic extraction step on the dissolving pulp line as the target pulp purity can be achieved by performing just a prehydrolysis step, with reutilization of an acidic hydrolysate stream in a kraft pulp line.

According to an example aspect of the present invention, there is provided a method of replacing with sodium make-up chemicals sodium losses caused by outflows in a pulp mill which employs a kraft process for producing cellulosic pulp, wherein the pulp mill includes a unit for conversion of sulphurous compounds, which is fed with sulphurous substances of the kraft process to convert said sulphurous substances into oxidized sulphurous compounds, said method comprising using sodium sulphate possibly together with other sodium salts as the main make-up chemical, to achieve an essentially sodium hydroxide free feed of sodium make-up chemicals, and at least a part of the sulphur contained in the sodium sulphate make-up chemical being used for producing oxidized sulphurous compounds in said unit for conversion of sulphurous compounds.

A wax-extender emulsion is described herein. In one aspect, the wax-extender emulsion includes a wax component. The wax component may be a petroleum-based wax, a bio-based wax, a synthetic wax or mixtures thereof. The wax-extender emulsion includes a dewatered, kraft lignin associated with the wax component and a pH modifier. The pH modifier a monofunctional amine, a multi-functional amine, an alkali metal salt, an alkaline earth metal salt, or combinations thereof. In one aspect, the emulsion comprises 20 wt % to 60 wt % wax component. During manufacturing, the dewatered, kraft lignin and the wax component may be emulsified and homogenized together to produce the wax-extender emulsion. The wax-extender emulsion can be co-applied as a mixture with adhesive resin during wood-based composite manufacturing.

An aqueous wax emulsion or dispersion comprising, wax, water and an emulsifier wherein the emulsifier comprises purified kraft lignin and a water-soluble base. A process for preparing said aqueous wax dispersions and their use.

The present invention relates to a method for reducing metal content in a kraft pulping process, which includes adding magnesium to black liquor that is returned to the pulping operation; a method for reducing aluminum content in a pulping process by adding magnesium to black liquor to provide green liquor with a specific magnesium:aluminum molar ratio; a method for producing or treating green liquor with a specific magnesium:aluminum molar ratio by adding magnesium to black liquor, weak black liquor, or strong black liquor; and a method for producing hydrotalcite by adding at least 0.04 to 5.0 moles of magnesium:aluminum present in weak black liquor, strong black liquor, or a combination thereof. A pulp mill is also provided, which includes, among other parts, a digester (1), a washer (2), optionally a pulp bleacher, and a weak black liquor thickener (4).

The invention relates to a preparation method of a lignin nanoparticle / polyester composite packaging film, and belongs to the field of lignin high-valued application. The industrial sulfate lignin is subjected to molecular weight grading through a green organic solvent, LNPs is prepared by combining an anti-solvent precipitation technology, and the LNPs is doped into PBAT to prepare the LNPs / PBAT composite packaging film. The obtained composite film is remarkably superior to a sample doped with original lignin in the aspects of mechanical property, ultraviolet barrier property, oxidation resistance and antibacterial property, and the method is green in process, high in controllability and suitable for large-scale application and has good lignin high-value utilization and packaging material development prospects.

The present invention relates to the chemical industry and preferably to the industry relating to novel products derived from or based on lignin, and even more preferably to products derived from or based on modified lignin, phenolic adhesive resins comprising same and use thereof as adhesive for plywood panels, particle boards, chipboards and pine veneers, inter alia. The starting lignin is Kraft lignin.

The invention relates to the field of oil and gas exploitation, in particular to a corrosion inhibitor for carbon dioxide corrosion and a preparation method thereof. The corrosion inhibitor for carbon dioxide corrosion comprises the following components: foots, sodium hydroxide, a paper pulp by-product, sulfuric acid, m-phenylenediamine, rosin amine, diethylenetriamine and EDTMP, and the paper pulp by-product is a by-product obtained by using wood as a raw material and preparing paper pulp through a sulfate method. The corrosion inhibitor for carbon dioxide corrosion not only is low in cost, but also is low in corrosion rate.

A digester additive formulation includes a combination of phenyl tetracarboxylic acid or a derivative or salt thereof, and a macromolecule polymer. The digester additive formulation is as an additive for a kraft process for production of pulp from raw materials, such as wood chips. When used in the kraft pulping process, the digester additive formulation improves viscosity of the resulting pulp and increases pulp yield.

The present invention relates to a polymer matrix modifying composition having anti-corrosion, biocidal and mechanical property enhancing properties, comprising between 50 and 99% of an organic component consisting of lignin selected from the group consisting of organic solvent lignin, kraft lignin, soda lignin and / or derivatives thereof; between 1 and 40% of a divalent or trivalent inorganic cation; and between 0 and 10% of a formulation aid. The invention also relates to a method for the production and use thereof for providing properties of corrosion protection, biocidal and / or enhanced mechanical properties of a polymer matrix when the composition is homogeneously mixed with the polymer matrix in a final proportion of 0.1 to 5% w / w with respect to the polymer matrix prior to curing.

To provide a skin patch sheet in which the capability to absorb ultraviolet rays is readily maintained at positions to which ultraviolet absorbing capability has been imparted by the user, and the sheet body is prevented from appearing to lift off from the skin, and a method for producing the skin patch sheet.SOLUTION: A skin patch sheet 10 comprises: a substrate layer 11 containing an aqueous polymer compound and at least one of lignin sulfonate and kraft lignin; and an adhesive layer 12 laminated on the substrate layer 11. The adhesive layer 12 is located on the side opposite to the surface facing the substrate layer 11 and includes an adhesive surface 12S for skin attachment. In a sheet body 10B including the substrate layer 11 and the adhesive layer 12, the transmittance throughout the full range of 280 nm to 400 nm is 80% or less.SELECTED DRAWING: Figure 1

A roofing bitumen composition includes a paving grade bitumen feedstock, a low MW polyolefin, and 9-60% of a material selected from the group of kraft lignin, recycled fibrous material, recovered bitumen from recycled asphalt shingles (RAS), reclaimed asphalt pavement (RAP), recycled tire rubber (RTR), and combinations thereof. This roofing bitumen composition has a calculated reduction in scope 3 carbon footprint between about 5% and 60%.

The invention discloses a covalent modification method of a high-performance lignin-based electrode material, and belongs to the technical field of biomass-based supercapacitors. The method specifically comprises the following steps: dissolving sulfate lignin in DMF (Dimethyl Formamide), adding a bifunctional reagent, and stirring for reaction; and after the reaction is finished, pouring the reaction liquid into deionized water in which hydrochloric acid is dropwise added, and carrying out anti-precipitation, filtration, drying, heat treatment, activation and other processes to obtain the covalent modified lignin. The modified lignin, a conductive agent and a binder are ground and mixed, a current collector is coated with the mixture and dried, and the lignin-based electrode is obtained. The covalent modification degree of the lignin is regulated and controlled by controlling the adding amount of the bifunctional reagent, modified lignin with different thermodynamic properties is obtained, and the purpose of regulating and controlling lignin derived carbon structure defects is achieved. The preparation method is controllable in scale and simple to operate, the obtained electrode material is few in defect structure and excellent in electrochemical performance, and a new theory and a new method are provided for development of the lignin-based electrode material.

Bio-based polymer precursors and non-isocyanate polyurethanes (NIPU) and non-isocyanate polyurethane foams (NIPUF) that can be formed from the precursors, and methods of synthesizing the precursors and polyurethane products, are described. The bio-based polymer precursors are formed by functionalizing a bio-based polyol, such as lignin, with a cyclic carbonate. The bio-based polyol starting material does not require pre-processing, and can include kraft lignin. The NIPU / NIPUF can be synthesized by a ring-opening curing reaction of the cyclic carbonate of the bio-based polyol precursor with a diamine. The carbonate and diamine can constitute a non-toxic, bio-based carbonate.

This invention belongs to the field of lignin resource utilization technology and discloses a method for preparing vanillin by oxidative degradation of sulfate lignin with sodium percarbonate. The method includes the following steps: preparing sulfate lignin from pulping black liquor, wherein 1,4-dioxane is used to purify the sulfate lignin during the preparation process; dissolving the purified sulfate lignin in an alkaline aqueous solution of alcohol to obtain a raw material solution; adding sodium percarbonate to the raw material solution for oxidative degradation reaction; after the reaction, cooling the reaction solution, adding acid to adjust the pH to acidic, and separating the solid and liquid to obtain a supernatant containing vanillin. This method retains the highly reactive sites of lignin through 1,4-dioxane purification, and combines the synergistic effect of the sodium percarbonate green oxidation system and the alcohol / water two-phase solvent system to significantly improve the yield and selectivity of vanillin. Furthermore, the process is mild, environmentally friendly, controllable, and easily scalable.

The invention relates to a high-temperature resistant and flame-retardant ultra-high molecular weight polyethylene composite yarn and a preparation method thereof. The composite yarn of the invention adopts a special high-temperature resistant and spinning process, and is subjected to a composite treatment of sodium alginate, alkali sulfate lignin, ammonium polyphosphate, graphene oxide, magnesium hydroxide, low-temperature plasma, aluminum foil, and carbon fiber impregnation adhesive, and is externally coated with ceramic fibers. The ultra-high molecular weight polyethylene fibers can maintain performance stability in a high-temperature environment, effectively prevent the fibers from melting or thawing, do not melt when exposed to fire, produce low or no smoke, and do not release toxic gases, thereby improving safety in use.

The present invention relates to the field of carbon-based catalysts and electrocatalysis technology, and specifically to the preparation and application of a lignin-derived oxygen reduction / oxygen evolution bifunctional electrocatalyst material. The present invention solves the problems of high cost, poor stability, and single function of catalysts formed by conventional technologies. The present invention comprises an oxygen reduction / oxygen evolution bifunctional electrocatalyst material, which is composed of sulfate lignin powder, sodium chloride, urea, and nitrate solution, wherein the mass ratio of sulfate lignin powder, sodium chloride, urea, and nitrate solution is 1:5:5:100. The present invention uses sulfate lignin as a carbon substrate, NaCl for pore formation, urea as a nitrogen source, and iron nitrate nonahydrate and nickel nitrate hexahydrate as Fe and Ni sources, respectively, to prepare a lignin-derived carbon-based bifunctional oxygen electrocatalyst that is co-doped with S and N and loaded with Fe and Ni bimetallics.

A useful digester aid for a Kraft pulping process is an aromatic polycarboxylic acid that: (a) contains an aromatic moiety having on average at least 2 carboxylic acid groups per molecule pendant from the aromatic moiety; and (b) has an electron affinity below -2.80eV and at least -3.6eV. or is a functional equivalent of the aromatic polycarboxylic acid.

This invention discloses a bio-based composite reinforcing agent, comprising, by weight, the following raw materials: 4-8 parts of silica, 1-4 parts of lignin, and 1-4 parts of modified glass fiber powder. The lignin is any one or a combination of enzymatically hydrolyzed lignin, alkali lignin, lignin sulfate, lignin sulfonate, and etherified lignin. The silica is any one or a combination of JS180, JS185, 2115MP, 1165MP, V15, and V43. The modified glass fiber powder is obtained by modifying glass fiber powder with dopamine. This invention also discloses a method for preparing this bio-based composite reinforcing agent and its application in shoe sole materials. The prepared bio-based composite reinforcing agent has a good reinforcing effect on the rubber matrix and can improve the overall performance of the shoe sole.

The present invention discloses a kraft lignin-heptazine conjugated polymer, a preparation method thereof, and an application thereof. The structure of the kraft lignin-heptazine conjugated polymer comprises kraft lignin and a heptazine ring. The kraft lignin-heptazine conjugated polymer of the present invention is prepared by copolymerizing kraft lignin and a carbon-nitrogen polymer in an alkali metal salt. The copolymerization of the kraft lignin of the present invention effectively reduces the band gap of the heptazine-based polymer, extends its light absorption response range to the long-wavelength visible light region, and improves the separation efficiency of photogenerated carriers; the kraft lignin-heptazine conjugated polymer has significant advantages in the photocatalytic reduction of hydrogen peroxide and is reusable; kraft lignin is the main component of papermaking black liquor, has abundant sources, and is low in acquisition cost. The present invention provides a new direction for the high-value utilization of kraft lignin; the present invention also simplifies the preparation of hydrogen peroxide, which can be carried out under normal pressure air, and no additional oxygen is required during the preparation process.