Disclosed is a method for making a carbon fibre from a paper product. The method includes preparing a cellulose-based fibre by crushing the paper product, dissolving the crushed material obtained in an aqueous phosphoric acid solution to form a spinning solution, and forming a cellulose-based continuous fibre by use of a solvent spinning process. The cellulose fibre formed in this way is subjected to carbonisation treatment in order to form a carbon fibre.

A process and a device for regenerating a solvent for cellulose in a shaped cellulose article production process, including the steps of starting a continuous process for the production of solid shaped cellulose articles from a cellulose solution which includes the steps of: i) providing a cellulose solution of dissolved cellulose and a cellulose solvent and preferably a non-solvent, particularly preferably water, ii) shaping the cellulose solution into a desired geometrical shape, iii) consolidating the shaped cellulose solution into shaped cellulose articles in a coagulation liquid, iv) washing the shaped cellulose articles, wherein upon start-up and/or during the continuous process, shaped article waste of the cellulose solution accrues in an unwanted form, collecting the shaped article waste in the unwanted form, comminuting the shaped article waste, extracting solvent from the comminuted shaped article waste.

A process and a device for regenerating a solvent for cellulose in a shaped cellulose article production process, including the steps of starting a continuous process for the production of solid shaped cellulose articles from a cellulose solution which includes the steps of: i) providing a cellulose solution of dissolved cellulose and a cellulose solvent and preferably a non-solvent, particularly preferably water, ii) shaping the cellulose solution into a desired geometrical shape, iii) consolidating the shaped cellulose solution into shaped cellulose articles in a coagulation liquid, iv) washing the shaped cellulose articles, wherein upon start-up and/or during the continuous process, shaped article waste of the cellulose solution accrues in an unwanted form, collecting the shaped article waste in the unwanted form, comminuting the shaped article waste, extracting solvent from the comminuted shaped article waste.

Provided is a cellulose solution (a composition) in which decomposition of cellulose does not easily proceed even if heated. Further, provided is a method for producing a cellulose fiber excellent in mechanical strength. The composition includes cellulose and a compound represented by the following formula (1), a concentration of 1-methylimidazolium chloride being 300 ppm or less on a mass basis with respect to the compound represented by the formula (1).

In the formula (1), R is an alkyl group having 2 to 6 carbon atoms, and Me is a methyl group.

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A method of obtaining rayon fibers from cellulose waste is provided. The method includes extracting alpha-cellulose from cellulose waste, dissolving the alpha-cellulose in a cuoxam solution, obtained by reacting gaseous ammonia with an aqueous solution of copper hydroxide, to obtain a chemically modified cellulose. The chemically modified cellulose was extruded in an acid bath to obtain a precipitate. The precipitate was further neutralized to obtain the rayon fibers.

The present disclosure discloses a method for preparing cellulose fiber. The method includes the following steps: 1) mixing cellulose pulp with NMMO aqueous solution of a mass concentration of 60%-85%, preferably 70% to 76%, to obtain a uniform mixture; 2) subjecting the obtained uniform mixture to dewatering for swelling, dissolution, and deaerating to obtain a cellulose spinning stock solution; 3) the cellulose spinning stock solution entering into a spinning machine after being filtered and heat exchange, and entering into a coagulation system after carrying out extruding by a spinneret-pack and cooling by air, and then coagulating in a NMMO coagulating bath of a mass concentration of 50% to 72% to obtain nascent fiber; and 4) subjecting the nascent fiber to rinsing to obtain a fiber filament bundle, and then, performing subsequent-section treatment to obtain cellulose fiber.

The present disclosure relates to methods and systems for recovering and repolymerizing textile fibers. Textile fibers, such as those containing cellulose or elastomers, can undergo multiple rounds of recovery and regeneration. During the regeneration process, the textile fibers are isolated from non-desired material, repolymerized or reformed, and then extruded to form a second set of textile fibers. The degree of polymerization of the textile fiber decreases with each regeneration cycle. Regeneration and production can be repeated any appropriate number of times until the regenerated textile fibers do not have the necessary or appropriate degree of polymerization for textile production.

The present disclosure relates to methods and systems for recovering and repolymerizing textile fibers. Textile fibers, such as those containing cellulose or elastomers, can undergo multiple rounds of recovery and regeneration. During the regeneration process, the textile fibers are isolated from non-desired material, repolymerized or reformed, and then extruded to form a second set of textile fibers. The degree of polymerization of the textile fiber decreases with each regeneration cycle. Regeneration and production can be repeated any appropriate number of times until the regenerated textile fibers do not have the necessary or appropriate degree of polymerization for textile production.

Method of manufacturing a regenerated cellulosic molded body, wherein the method comprises supplying a starting material which comprises cellulose and at least one foreign matter, transferring at least a part of the starting material with at least a part of the at least one foreign matter into a spinning mass which additionally contains a solvent for solving at least a part of the cellulose of the starting material in the solvent, and extruding the spinning mass to the molded body, and subsequently precipitating in a spinning bath, wherein thereby the molded body is obtained, wherein the molded body comprises cellulose and at least a part of the at least one foreign matter.

Method of manufacturing a regenerated cellulosic molded body, wherein the method comprises supplying a starting material which comprises cellulose and at least one foreign matter, transferring at least a part of the starting material with at least a part of the at least one foreign matter into a spinning mass which additionally contains a solvent for solving at least a part of the cellulose of the starting material in the solvent, and extruding the spinning mass to the molded body, and subsequently precipitating in a spinning bath, wherein thereby the molded body is obtained, wherein the molded body comprises cellulose and at least a part of the at least one foreign matter.