Abstract: The disclosure provides a method for preparing an amphiphilic lignin nanomaterial based on pulping black liquor, an amphiphilic lignin nanomaterial, and an oil sludge detergent. In the disclosure, physical treatments such as ball milling and high-pressure jet homogenization treatment are conducted on alkali lignin at the early stage to adjust the molecular weight and size of alkali lignin and thus to give alkali lignin nanoparticles with uniform particle sizes; and on this basis, a chemical treatment such as alkylation grafting modification is conducted to give amphiphilic lignin nanoparticles with both hydrophilicity and lipophilicity. Due to the nano-size effect, the amphiphilic lignin nanomaterial has a significantly-increased specific surface area (SSA) and effectively-improved surface properties, which can reduce the oil-water interfacial tension, and emulsify the crude oil and peel off the crude oil from the surface of rock particles, so as to achieve the purpose of oil-solid separation.

Abstract: Described is an aqueous polymer dispersion comprising a chain growth addition polymer obtainable via free-radically initiated emulsion polymerization from ethylenically unsaturated, free-radically polymerizable monomers, wherein the chain growth addition polymer is formed to an extent of not less than 60 wt % from primary monomers selected from vinylaromatic compounds, conjugated aliphatic dienes, vinyl esters of saturated C1- to C20-carboxylic acids, esters of acrylic acid or of methacrylic acid with monohydric C1- to C20-alcohols, aliphatic hydrocarbons having 2 to 8 carbon atoms and one or two double bonds, or mixtures thereof, wherein the monomers are polymerized in the presence of lignosulfonate and wherein the chain growth addition polymer is branched or crosslinked. Also described is a process for preparing the aqueous polymer dispersion. The polymer dispersion is useful for preparing paper coating compositions.

Abstract: The present invention relates to a method for increasing the reactivity of lignin, wherein the method comprises the following steps: a) forming, under heating at a temperature of 30-70° C., an aqueous dispersion comprising alkali and lignin, wherein the alkali comprises a hydroxide of an alkali metal; and b) heating the dispersion formed in step a) at a temperature of 50-95° C. for producing alkalated lignin.

Abstract: The invention relates to a method for producing a binder composition, wherein the method comprises the following steps: (i) forming an aqueous composition comprising reactant components including lignin, a polymerizable substance and a crosslinking agent in the presence of a catalyst; (ii) cooking the formed composition until the composition has a viscosity, which corresponds to 45-95% of a predetermined viscosity value of the final binder composition; (iii) adding tannin as a reactant component to the composition; and (iv) cooking the composition at a temperature of 60-95° C. for polymerizing the reactant components until a binder composition with a predetermined viscosity value is formed.

Abstract: Biobased cross-linked compositions, methods of fabrication and structures, in particular biobased printed wiring boards using the compositions and methods of making the structures are described. Biobased materials such as lignin, crop oils, wood resins, tannins, and polysaccharides and combinations thereof are cross-linked, preferably using heat, a cross-linking agent, and an initiator. The materials fabricated have suitable properties for printed wiring boards which are made by impregnating a fiberglass or biobased cloth with an admixture of the biobased material, cross-linking agent and initiator which is processed by conventional methods to produce a printed wiring board.

Abstract: Tannin containing polymers, their method of production and methods of using as water treatment agents are disclosed. The tannin containing polymers comprise copolymers of tannin and a cationic monomer. Another embodiment comprises tannin containing polymers of tannin, cationic monomer and at least one monomer selected from the group consisting of an anionic monomer and a nonionic monomer.

Abstract: The invention concerns the waste liquor from the chemical-thermal pulping of fibre boards and particle boards containing bonding agents. The waste liquor is produced through a procedure in which fibre boards and wood particle boards are first chopped into shreds and, in a subsequent step, pulped according to a chemical-thermal procedure which dissolves the wood structure. The liquid remaining after the separation of the cellulose is retained as waste liquor and used as extender for wood adhesives.

Abstract: Tannin containing polymers, their method of production and methods of using as water treatment agents are disclosed. The tannin containing polymers comprise copolymers of tannin and a cationic monomer. Another embodiment comprises tannin containing polymers of tannin, cationic monomer and at least one monomer selected from the group consisting of an anionic monomer and a nonionic monomer.

Abstract: A heat-curable, formaldehyde-free binding agent comprising a polyflavonoid type tannin and as a curing catalyst, a compound having a weak acid reaction curable at relatively high temperatures and compatible with cellulose containing materials such as wood chips for the production of particle boards.

Abstract: A soluble or crosslinked graft copolymer of lignin-(2-propenamide)-(2-methyl-3-oxo-4-oxyhex-1-ene-6-ol) having a central lignin network and at least one grafted side chain, R, having randomly repeating units of the formula: ##STR1## such that the central lignin network has a molecular weight of about 1,000 to 150,000 and the total number of randomly repeating units in the grafted side chain or chains is in the range of 1 to 300,000, such that the total copolymer molecular weight is in the range of 1,000 to 30,000,000 for use as thickeners for water and aqueous solutions and may be advantageously used in the recovery of oil from subterranean wells, in the preparation and use of drilling fluid compositions, or in plastics and elastomers.

Abstract: An aqueous gel composition is formed from xanthan gum crosslinked with ions of a transitional metal, resorcinol, and formaldehyde. The gel which initially forms is injected into a formation where it selectively enters pores in a more permeable zone. Once in the more permeable zone, the gel reheals and forms a shear and thermally stable gel. This gel can be used in high temperature formations in addition to those formations having a pH of from about 3.0 to about 10. After the shear and thermally stable gel has formed, a steam-flooding, water-flooding, or a carbon dioxide oil recovery process is commenced in a zone of lesser permeability.

Abstract: The invention provides a method for the enhanced recovery of oil from an oil-bearing stratum having a zone of high fluid permeability through plugging of this zone by introducing into the stratum a gelable solution which, in the case of use under moderately high operating temperatures in the stratum, comprises a polyphenolic lignin extract, a formaldehyde source and sufficient alkaline material to give a solution having a pH of at least 9.0 and which, in the case of higher operating temperatures, comprises a lignosulfonate and a source of formaldehyde or tannin in aqueous solution.

Abstract: The present invention relates to new azulmic acids stabilized by condensation with carbonyl compounds, several processes for their preparation and their use for various purposes.