# US 2015/0147787 A1 · Process of producing sugar solution > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0147787 A1 - Document ID: US20150147787A1 - Status: Published application - Kind: A1 - Application number: 14/405,239 - Filed: 2013-06-04 - Published: 2015-05-28 - Earliest claimed: 2012-06-05 - Assignees: Toray Industries, Inc. - Applicants: Toray Industries, Inc. - Inventors: Hiroyuki Kurihara; Katsushige Yamada - Web page: https://patentgrep.com/patent/US20150147787A1 ## CPC - C13K 1/04: Purifying - C12P 7/56: Lactic acid - C12P 19/02: Monosaccharides (2-ketogulonic acid C12P7/60) - C12P 19/14: produced by the action of a carbohydrase {(EC 3.2.x)}, e.g. by alpha-amylase {, e.g. by cellulase, hemicellulase} - C13K 13/002: {Xylose} - C12P 2203/00: Fermentation products obtained from optionally pretreated or hydrolyzed cellulosic or lignocellulosic material as the carbon source - Y02E 50/10: Biofuels, e.g. bio-diesel - C13K: SACCHARIDES OBTAINED FROM NATURAL SOURCES OR BY HYDROLYSIS OF NATURALLY OCCURRING DISACCHARIDES, OLIGOSACCHARIDES OR POLYSACCHARIDES (chemically synthesised sugars or sugar derivatives C07H; polysaccharides, e.g. starch, derivatives thereof C08B; malt C12C; fermentation or enzyme-using processes for preparing compounds containing saccharide radicals C12P19/00; production of sucrose C13B) - C12P: FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE {(brewing of beer C12C; producing vinegar C12J; producing specific peptides or proteins C07K; producing enzymes C12N9/00; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification C12N15/00; measuring or testing processes involving enzymes or microorganisms C12Q; measuring or testing processes involving nucleic acid amplification reactions C12Q1/6844; fermentation processes to form a food composition, A21 or A23; compounds in general, see the relevant compound class, e.g. C01, C07)} - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A method produces a sugar liquid from a cellulosic biomass material, which sugar liquid has improved fermentability. The method produces a sugar liquid by: adding an alkali(s) to a concentrated cellulosic biomass sugar liquid to adjust the pH to not less than 7 to precipitate an insoluble substance(s) containing at least magnesium; and performing filtration through a microfiltration membrane to remove the insoluble substance(s), to obtain a sugar liquid as a permeate. ## Claims ### Claim at position 1 1-8. (canceled) ### Claim 9 A method of producing a sugar liquid comprising: adding an alkali(s) to a concentrated cellulosic biomass sugar liquid to adjust the pH to not less than 7 to precipitate an insoluble substance(s) containing at least magnesium; and performing filtration through a microfiltration membrane to remove said insoluble substance(s) and obtain a sugar liquid as a permeate. ### Claim 10 (depends on 9) The method according to claim 9, wherein said concentrated cellulosic biomass sugar liquid is a sugar liquid prepared by subjecting a hydrolysate obtained from a cellulosic biomass by any one or more of treatments selected from the group consisting of hydrothermal treatment, acid treatment, alkali treatment and enzyme treatment, to any one or more of treatments selected from the group consisting of membrane concentration, concentration under reduced pressure and concentration by heating. ### Claim 11 (depends on 9) The method according to claim 9, wherein the pH is adjusted to not less than 8. ### Claim 12 (depends on 9) The method according to claim 9, wherein average pore size of said microfiltration membrane is within the range of 0.01 μm to 1 μm. ### Claim 13 (depends on 9) The method according to claim 9, wherein said microfiltration membrane is a hollow fiber microfiltration membrane. ### Claim 14 (depends on 9) The method according to claim 9, wherein one or more additives selected from the group consisting of nitrogen sources, metal salts, vitamins, amino acids, sugars, antifoaming agents and surfactants are further added. ### Claim 15 (depends on 9) A method of producing a chemical product comprising culturing a microorganism using, as a fermentation feedstock, a sugar liquid obtained by the method according to claim 9. ### Claim 16 (depends on 9) A method of producing a chemical product comprising culturing a microorganism using, as a fermentation feedstock, a sugar liquid obtained by the method according to claim 9 to allow production of a chemical product in a culture liquid, while continuously or intermittently filtering said microorganism and said chemical product through a separation membrane to recover said chemical product. ### Claim 17 (depends on 10) The method according to claim 10, wherein the pH is adjusted to not less than 8. ### Claim 18 (depends on 10) The method according to claim 10, wherein average pore size of said microfiltration membrane is within the range of 0.01 μm to 1 μm. ### Claim 19 (depends on 11) The method according to claim 11, wherein average pore size of said microfiltration membrane is within the range of 0.01 μm to 1 μm. ### Claim 20 (depends on 10) The method according to claim 10, wherein said microfiltration membrane is a hollow fiber microfiltration membrane. ### Claim 21 (depends on 11) The method according to claim 11, wherein said microfiltration membrane is a hollow fiber microfiltration membrane. ### Claim 22 (depends on 12) The method according to claim 12, wherein said microfiltration membrane is a hollow fiber microfiltration membrane. ### Claim 23 (depends on 10) The method according to claim 10, wherein one or more additives selected from the group consisting of nitrogen sources, metal salts, vitamins, amino acids, sugars, antifoaming agents and surfactants are further added. ### Claim 24 (depends on 11) The method according to claim 11, wherein one or more additives selected from the group consisting of nitrogen sources, metal salts, vitamins, amino acids, sugars, antifoaming agents and surfactants are further added. ### Claim 25 (depends on 12) The method according to claim 12, wherein one or more additives selected from the group consisting of nitrogen sources, metal salts, vitamins, amino acids, sugars, antifoaming agents and surfactants are further added. ### Claim 26 (depends on 13) The method according to claim 13, wherein one or more additives selected from the group consisting of nitrogen sources, metal salts, vitamins, amino acids, sugars, antifoaming agents and surfactants are further added.