# US 5,350,524 A · Mixed polysaccharide precipitating agents and insulating articles shaped therefrom > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,350,524 A - Document ID: US5350524A - Status: Granted - Kind: A - Application number: 07/737,766 - Filed: 1991-07-30 - Granted: 1994-09-27 - Earliest claimed: 1990-07-30 - Assignees: Rhone-Poulenc Chimie - Inventors: Marie-Madeleine Besnard; Claire David; Magali Knipper - Web page: https://patentgrep.com/patent/US5350524A ## CPC - C04B 26/28: Polysaccharides or derivatives thereof - C02F 1/5263: {using natural chemical compounds} - C04B 24/38: Polysaccharides or derivatives thereof {(C04B24/243 takes precedence)} - C08L 5/00: Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00 - Y02W 30/91: Use of waste materials as fillers for mortars or concrete - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT ## Abstract Mixed polysaccharide compositions, well adopted for flocculating/precipitating solid particulates from liquid dispersions thereof and for the shaping of insulating articles therefrom, comprise (i) at least one succinoglycan polysaccharide, the basic recurring structural unit of which comprising glucose, galactose and succinyl moieties, and (ii) at least one natural polysaccharide or derivative thereof. ## Claims ### Claim 1 In a process for precipitating solid particulates from an aqueous dispersion thereof by adding an effective amount of a precipitating agent thereto, the improvement which comprises utilizing as such precipitating agent a mixed polysaccharide composition of matter which is capable of precipitating a dispersion of solid particles in an aqueous medium, comprising: (i) at least one succinoglycan polysaccharide, the basic recurring structural unit of which comprises glucose, galactose and succinyl moieties, and (ii) at least one natural polysaccharide or derivative thereof, wherein in the aqueous medium the concentration of said mixed polysaccharide composition ranges from 0.001% to 0.5%. ### Claim 2 (depends on 1) The mixed polysaccharide as defined by claim 1, said at least one succinylglycan polysaccharide comprising glucose, galactose and succinyl moieties in molar ratios of from 5 to 8/1 to 3/0.5 to 2, respectively. ### Claim 3 (depends on 2) The mixed polysaccharide composition as defined by claim 2, said molar ratios ranging from 6 to 7.5/1 to 2/0.5 to 1, respectively. ### Claim 4 (depends on 1) The mixed polysaccharide composition as defined by claim 1, said at least one succinoglycan polysaccharide further comprising organic acid and/or mannose and/or glucuronic acid moieties. ### Claim 5 (depends on 4) The mixed polysaccharide composition as defined by claim 4, said at least one succinoglycan polysaccharide further comprising acetyl or pyruvyl moieties. ### Claim 6 (depends on 1) The mixed polysaccharide composition as defined by claim 1, said at least one succinoglycan polysaccharide (i) having been prepared by Agrobacterium, Arthrobacter, Rhizobium, Alcaligenes or Pseudomonas fermentation of a nutrient medium comprising at least one carbon source. ### Claim 7 (depends on 6) The mixed polysaccharide composition as defined by claim 6, said at least one succinoglycan polysaccharide (i) having been prepared by Agrobacterium tumefaciens I-736 fermentation. ### Claim 8 (depends on 1) The mixed polysaccharide composition as defined by claim 1, comprising at least one plant or animal polysaccharide (ii) or derivative thereof. ### Claim 9 (depends on 8) The mixed polysaccharide composition as defined by claim 8, said at least one plant or animal polysaccharide (ii) or derivative thereof comprising a gum. ### Claim 10 (depends on 8) The mixed polysaccharide composition as defined by claim 8, comprising a cellulose derivative. ### Claim 11 (depends on 10) The mixed polysaccharide composition as defined by claim 10, said cellulose derivative comprising a cellulose derivative selected from the group consisting of hydroxymethylcellulose, hydroxyethylcellulose, hydroxymethylpropylcellulose and hydroxypropylcellulose. ### Claim 12 (depends on 8) The mixed polysaccharide composition as defined by claim 8, comprising a cationic starch or galactomannan. ### Claim 13 (depends on 1) The mixed polysaccharide composition as defined by claim 1, wherein the weight ratio between the at least one succinoglycan polysaccharide and the at least one natural polysaccharide or derivative thereof ranges from 5/95 to 95/5. ### Claim 14 (depends on 13) The mixed polysaccharide composition as defined by claim 13, said weight ratio ranging from 30/70 to 70/30. ### Claim 15 (depends on 1) The mixed polysaccharide composition as defined by claim 1, further comprising a flocculating agent. ### Claim 16 (depends on 15) The mixed polysaccharide composition as defined by claim 15, said flocculating agent comprising a quaternary ammonium organic compound, ammonium hydroxide, a synthetic anionic organic polymer or copolymer or salt thereof, or an iron or aluminum group compound. ### Claim 17 (depends on 1) The process as defined by claim 1, comprising adding such mixed polysaccharide precipitating agent to a concentration ranging from 0.001% to 0.5% by weight. ### Claim 18 (depends on 17) The process as defined by claim 17, said concentration ranging from 0.005% to 0.2% by weight. ### Claim 19 (depends on 1) The process as defined by claim 1, said solid particulates comprising inorganic fibers. ### Claim 20 (depends on 19) The process as defined by claim 19, said solid particulates also comprising inorganic filler material. ### Claim 21 (depends on 1) The process as defined by claim 1, said solid particulates comprising wood fibers. ### Claim 22 (depends on 1) The process as defined by claim 1, said at least one natural polysaccharide comprising a natural polysaccharide selected from the group consisting of a glucomannan, a galactomannan, an alginate and a starch. ### Claim 23 An insulating shaped article, comprising an insulating amount of inorganic fibers and a mixed polysaccharide composition of matter which is capable of precipitating a dispersion of solid particles in an aqueous medium, comprising: (i) at least one succinoglycan polysaccharide, the basic recurring structural unit of which comprises glucose, galactose and succinyl moieties, and (ii) at least one natural polysaccharide or derivative thereof, wherein in the aqueous medium the concentration of said mixed polysaccharide composition ranges from 0.001% to 0.5%. ### Claim 24 (depends on 23) The insulating shaped article as defined by claim 23, further comprising at least one inorganic filler material. ### Claim 25 An insulating shaped article, comprising an insulating amount of wood fibers and a mixed polysaccharide composition of matter which is capable of precipitating a dispersion of solid particles in an aqueous medium, comprising: (i) at least one succinoglycan polysaccharide, the basic recurring structural unit of which comprises glucose, galactose and succinyl moieties, and (ii) at least one natural polysaccharide or derivative thereof, wherein in the aqueous medium the concentration of said mixed polysaccharide composition ranges from 0.001% to 0.5%. ### Claim 26 (depends on 25) The insulating shaped article as defined by claim 25, further comprising at least one inorganic filler material. ### Claim 27 In a process for the purification of a water supply having particulate impurities suspended therein by flocculating/precipitating such impurities therefrom, the improvement which comprises flocculating/precipitating such impurities with a mixed polysaccharide composition of matter which is capable of precipitating a dispersion of solid particles in an aqueous medium, comprising: (i) at least one succinoglycan polysaccharide, the basic recurring structural unit of which comprises glucose, galactose and succinyl moieties, and (ii) at least one natural polysaccharide or derivative thereof, wherein in the aqueous medium the concentration of said mixed polysaccharide composition ranges from 0.001% to 0.5%. ### Claim 28 A method for precipitating ceramic fibers from dispersion comprising adding to a ceramic fiber containing dispersion an effective amount of a precipitating agent comprising a succinoglycan type polysaccharide produced by Agrobacterium tumefaciens I-736 and at least one natural polysaccharide or derivative thereof. ### Claim 29 (depends on 28) The method of claim 28 wherein the natural polysaccharide is cationic guar gum or cationic starch. ### Claim 30 (depends on 28) The method of claim 28 wherein the weight ratio between said succinoglycan polysaccharide and the natural polysaccharide ranges from 5/95 to 95/5. ### Claim 31 (depends on 30) The method of claim 30 wherein the weight ratio ranges from 70/30 to 30/70. ### Claim 32 (depends on 31) The method of claim 31 wherein the ceramic fibers comprise alumina/silica fibers.