# US 10,501,606 B2 · Modified cellulose fibers and preparation method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,501,606 B2 - Document ID: US10501606B2 - Status: Granted - Kind: B2 - Application number: 16/060,437 - Filed: 2016-12-07 - Published: 2019-01-03 - Granted: 2019-12-10 - Earliest claimed: 2015-12-08 - Assignees: Technische UniversitäT Berlin - Applicants: Technische Universität Berlin - Inventors: Thomas Kunz; Niklas Ole Brandt; Frank-Jürgen Methner - Web page: https://patentgrep.com/patent/US10501606B2 ## CPC - C08L 1/02: Cellulose; Modified cellulose - B01D 39/18: the material being cellulose or derivatives thereof ({cork or peat B01D39/1646} ; making filter paper D21F11/14) - C08K 3/36: Silica - B01D 2239/10: Filtering material manufacturing - C08L 3/02: Starch; Degradation products thereof, e.g. dextrin - C08L 39/04: Homopolymers or copolymers of monomers containing heterocyclic rings having nitrogen as ring member - C08L 2203/12: used for fibers - C08L 2205/16: Fibres; Fibrils - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract The invention relates to a method for the preparation of modified cellulose fibers for artificial clarification of active haze substances from liquids. In addition, the invention relates to a modified cellulose fiber obtained by the method according to the invention for artificial clarification of active haze substances from a liquid, and to auxiliary filtering means containing one or more of the modified cellulose fibers. ## Claims ### Claim 1 A method for producing modified cellulose fibers for artificial clarification of turbidity-causing substances from beverages for human consumption, the method comprising the following steps: preparing a fiber mixture comprising 80-99.9 wt % cellulose fibers, 0.1-10 wt % sodium croscarmellose and 0-10 wt % of one or more additives; swelling and adjusting the volume and pH of the fiber mixture in a neutral to alkaline medium; heating the fiber mixture; washing the cooked fiber mixture to obtain a moist mass of the modified cellulose fibers; and, isolating the modified cellulose fibers to obtain a resulting finished fibers mixture for treatment for clarification of beverages for human consumption. ### Claim 2 (depends on 1) The method according to claim 1, wherein the fiber mixture for production of modified cellulose fibers is homogenized. ### Claim 3 (depends on 1) The method according to claim 1, wherein the cellulose fibers are selected from the group of fibers containing cellulose, cellulose containing fibers, fibers from grains, from wood, from bamboo, from wood chips, from wood wastes and mixtures of same, and wherein the fibers have an average fiber length in the range of <1 to 500 μm. ### Claim 4 (depends on 1) The method according to claim 1, wherein the fiber mixture according to step (a) comprises 92-99 wt % cellulose fibers, 1-8 wt % sodium croscarmellose and 0-4 wt % of one or more additives. ### Claim 5 (depends on 1) The method according to claim 1, wherein the fiber mixture according to step (a) is selected from a composition consisting of 90-99.9 wt % cellulose fibers, 0.1-5 wt % sodium croscarmellose and 0-5 wt % of one or more additives or from 90-99 wt % cellulose fibers and 1-5 wt % sodium croscarmellose and 0-5 wt % of one or more additives. ### Claim 6 (depends on 1) The method according to claim 1, wherein one or more additives are selected from the group of additives consisting of pectin, carrageenan, isinglass, hydrocolloids, starch, gallotannins, silica sol, silica gel, polyvinylpyrrolidone and polyvinylpolypyrrolidone as well as mixtures of same. ### Claim 7 (depends on 1) The method according to claim 1, wherein for workup of the fiber mixture, the pH is adjusted with at least one acid and/or with at least one base to a value between pH 6 and pH 13. ### Claim 8 (depends on 1) The method according to claim 1, further comprising after washing, drying the moist mass to a residual water content of 2-10 wt % to obtain a dry mass. ### Claim 9 A method for producing modified cellulose fibers for artificial clarification of turbidity-causing substances from liquids, the method comprising the following steps: preparing a fiber mixture comprising 80-99.9 wt % cellulose fibers, 0.1-10 wt % sodium croscarmellose and 0-10 wt % of one or more additives; swelling and adjusting the volume and pH of the fiber mixture in a neutral to alkaline medium; heating the fiber mixture; washing the cooked fiber mixture to obtain a moist mass of the modified cellulose fibers; and, isolating the modified cellulose fibers to obtain a resulting finished fibers mixture, wherein the finished fiber mixture is processed in an additional method step using the moist mass to form filter aids and/or filter sheets. ### Claim 10 (depends on 9) The method according to claim 9 wherein the additional method step comprises at least one process selected from layering, tamping, absorbing, pressing, and pouring the moist mass of the modified cellulose fibers into filter units. ### Claim 11 (depends on 10) The method according to claim 10 comprising preparing a filter aid by inserting at least one of the filter units into at least one of: deadend tube filters, deadend sheet filters, deadend disk filters, deadend leaf filters and layered sheet filters. ### Claim 12 (depends on 9) The method according to claim 9 further comprising after washing, drying the moist mass to a residual water content of 2-10 wt % to obtain a dry mass, wherein the dry mass finished fibers mixture is processed using at least one selected from layering, tamping, absorbing, and pressing the dry mass modified cellulose fibers into dry mass filter units. ### Claim 13 (depends on 12) The method according to claim 12 further comprising preparing dry mass filter aids by inserting at least one of the dry mass filter units into at least one off; deadend tube filters, deadend sheet filters, deadend disk filters, deadend leaf filters and layered sheet filters.