14 results about "Kraft lignin" patented technology

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.

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 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.

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.

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.

Compositions comprising Kraft lignin and a wax are provided for use as an additive for imparting water resistance to gypsum wallboards. The compositions comprise emulsions of the lignin and wax components or an aqueous dispersion of the wax in a lignin solution. Methods of preparing and using such compositions are also provided.

Bio-based polymer precursors and non-isocyanate polyurethanes (NIPU) and non-isocyanate polyurethane foams (NIPUF) that can be formed from the precursors, as well as methods for the synthesis of the precursors and the polyurethane products are described. The bio-based polymer precursors are formed through functionalization of a bio-based polyol, e.g., lignin, with cyclic carbonates. The bio-based polyol starting materials need not be pre-processed and can include Kraft lignin. NIPU / NIPUF can be synthesized through a ring opening curing reaction of cyclic carbonates of the bio-based polyol precursor with diamines. The carbonates and diamines can include non-toxic bio-based carbonates.

A blended furnish with improved performance characteristics while reducing environmental impact, when applied to a substrate and methods of making and using blended furnish are provided. A blended furnish comprises a urea-formaldehyde (UF) resin or a melamine-urea-formaldehyde (MUF) resin; a lignosulfonate, a kraft lignin or a sulfonated lignin; a deep eutectic solvent; an alkaline compound; optionally an additive; and a plurality of substrates, wherein the blended furnish has a buffer capacity of 2-200 mL of 0.1 N HCl by the Acid Titration Value (ATV) Method using 20 grams of blended furnish for a period of time up to 20 days. A composite product using a blended furnish is also provided.

A method for separating water and at least one lignin fraction, lignin derivatives, low-molecular carboxylic acids, sodium sulfate, or a mixture thereof from filtrates originating from a black liquor of a kraft process. Black liquor is concentrated to a solids content between 25 and 55 wt. %. A first separation step, polymer lignin with a number average of the molecular mass distribution of >6 kDa is precipitated and filtered out by lowering the pH value of the black liquor, a first filtrate is obtained which is acidified with sulfuric acid; a formed precipitate consisting of lignin is separated by means of filtration; a second acid filtrate is obtained, cooled to a temperature less than 10° C., a fraction consisting substantially of inorganic salts is crystallized out; the formed precipitate is filtered off, a third filtrate is obtained which contains low-molecular carboxylic acid-soluble lignin and groups of the inorganic salts.