800results about "Cellulose material pulping" patented technology

The invention discloses a method for preparing a herbal biological fiber and biological paper pulp, and the used microbial composite agent and a preparation method thereof. The biological fiber is prepared through pretreatment of a herbal raw material, biological degumming fermentation, and subsequent mechanical treatment of a fermentation product. The composite agent comprises degumming bacteria, nutrition bacteria and decolorizing bacteria, and various strains are synergistic without antagonistic reaction. In the method for preparing the biological fiber and the biological paper pulp, a chemical additive is not needed at all, but the high-cellulose and hemicellulose biological fiber and the biological paper pulp can be industrially produced; decolorization is complete, and the produced biological fiber and biological paper pulp have white color; a bleaching process is avoided, so investment in decolorizing production equipment is saved, and fiber extracting and pulping investment cost can be effectively reduced; in addition, waste gas and waste water are not generated in the fiber extracting and pulping process, inorganic pollutants are not generated, waste water and waste residues produced in each process step can be produced and converted into a biological fertilizer, and water is recycled.

Digesting cellulosic biomass in the presence of a slurry catalyst may reduce degradation product formation, but catalyst distribution and retention can be problematic. Digestion methods can comprise: providing cellulosic biomass solids and a slurry catalyst capable of activating molecular hydrogen in a digestion unit; providing a digestible filter aid in the digestion unit; distributing the slurry catalyst within the cellulosic biomass solids using fluid flow; retaining at least a portion of the slurry catalyst in a fixed location using the digestible filter aid; heating the cellulosic biomass solids in the presence of the slurry catalyst, a digestion solvent, and molecular hydrogen, thereby forming a liquor phase comprising soluble carbohydrates; and performing a catalytic reduction reaction on the soluble carbohydrates within the digestion unit, thereby at least partially forming a reaction product comprising a triol, a diol, a monohydric alcohol, or any combination thereof in the digestion unit.

Apparatus and methods in which one or more elemental taggants that are extrinsically placed in an object are detected by x-ray fluorescence analysis to identify or authenticate the object are described. The taggant is manufactured as part of the object or the taggant is placed into a coating, packaging, label, or otherwise embedded onto the object for the purpose of later verifying the presence or absence of these elements by x-ray fluorescence. The taggant is then analyzed by XRF and the analysis is then converted into a 2D symbol format that can be used in various security and authentication applications. By using x-ray fluorescence analysis, the apparatus and methods of the invention are simple and easy to use, without the limitations experience by current anti-counterfeiting technologies.

The enzymatic straw material pulping process includes three stages of mechanical pre-treatment, enzyme treatment and chemical pulping or chemical-mechanical pulping. After being pretreated mechanically in a pulp grinder, the straw material is treated with hemicellulase liquid or mixed enzyme liquid comprising hemicellulase and lignin peroxidase at pH 3.5-6.5 and 40-60 deg.c for 1-10 hr. In chemical pulping, the material is presoaked with waste pulp-making liquor before extruding out wastes liquor and digested; and in chemical-mechanical pulping, the material is first treated with EDTA, NaOH and H2O2 at 40-80 deg.c for 30-120 min and then ground to form the pulp. The present invention is used in papermaking enterprises with straw as material and has the advantages of low pollution load, high, paper pulp quality, easy-to-process waste liquor, etc.

A process for separating organic components from a pulp mill waste stream comprising the steps of washing a cellulose pulp to obtain an aqueous extraction liquor containing organic components, and separating at least a portion of said organic components from the extraction liquor by passing the extraction liquor through at least one nanofiltration membrane. The process may be used in conjunction with a variety of pulp mill processes, including kraft cooking processes, hot caustic extraction processes, sulfite cooking processes, and bleaching processes.

A process comprising treating a lignocellulosic material preferably pulp in the presence of a transition metal catalyst with a oxidizing agent selected from a group consisting of hydrogen peroxide, hypochlorite, hypochlorous acid and any combination thereof to form a treated lignocellulosic material having a viscosity equal to or less than about 17 cp and having reducing functional groups selected from the group consisting of aldehyde and aldehyde type functional groups at the C6 and C1 positions but predominating at the C1 position.

The present invention provides a novel production method of a cellulose nanofiber and a novel cellulose nanofiber.A method for producing a cellulose nanofiber comprising defibrating pulp by a single- or multi-screw kneader in the presence of water, the single or multi-screw kneader having a screw circumferential speed of 45 m / min. or more.