# US 2014/0193872 A1 · Process for the Conversion of Cellulosic Feedstock Materials > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0193872 A1 - Document ID: US20140193872A1 - Status: Published application - Kind: A1 - Application number: 14/105,742 - Filed: 2013-12-13 - Published: 2014-07-10 - Earliest claimed: 2012-12-14 - Inventors: Bo Ava Chen; Ian Dobson; Russell F. Heissner - Web page: https://patentgrep.com/patent/US20140193872A1 ## CPC - C12P 7/14: Multiple stages of fermentation; Multiple types of microorganisms or re-use of microorganisms - C12P 7/10: substrate containing cellulosic material - 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 1/02: obtained by saccharification of cellulosic materials (manufacture of fodder A23K10/32) - C12P 2201/00: Pretreatment of cellulosic or lignocellulosic material for subsequent enzymatic treatment or hydrolysis - 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 - 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)} - 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) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A process for converting a cellulosic feedstock to chemical compound, such as an alcohol, or mixture of chemical compounds, wherein one or more process streams can be used in one or more of the other process steps. ## Claims ### Claim 1 A process for converting a cellulosic feedstock to one or more chemical compounds, comprising: a) processing the feedstock to form a first juice and a first solids comprising cellulose and hemicellulose; b) hydrolyzing at least part of the first solids to form a first liquid comprising one or more sugars and second solids comprising cellulose; c) separating in one or more separation apparatuses first liquid from second solids to form a first liquid portion comprising one or more sugars and a solids portion comprising cellulose; d) fermenting at least part of the one or more sugars in the first liquid portion to form a first fermentation mixture comprising one or more chemical compounds; e) saccharifying in the presence of at least a portion of the first fermentation mixture at least part of the solids portion to form a second mixture comprising one or more sugars; f) fermenting at least a portion of the sugars in the second mixture to form a second fermentation mixture comprising one or more chemical compounds; and at least one of the following additional steps: i) washing second solids with at least part of the first juice; ii) adding at least a part of the first juice to solids portion exiting the one or more separation apparatuses; iii) combining in a slurry vessel at least a part of the first juice with at least a part of the solids portion comprising cellulose; iv) saccharifying solids portion in the presence of at least part of the first juice; and v) and fermenting sugars in the second mixture in the presence of at least part of the first juice. ### Claim 2 (depends on 1) The process of claim 1 wherein the first juice comprises one or more sugars. ### Claim 3 (depends on 1) The process of claim 1 wherein the processing comprises pressing the feedstock to form the first juice. ### Claim 4 (depends on 1) The process of claim 1 wherein the first juice comprises sucrose. ### Claim 5 (depends on 1) The process of claim 1 comprising step i) and wherein at least part of the first juice used for the washing is combined with first liquid. ### Claim 6 (depends on 1) The process of claim 1 wherein at least part of the saccharifying in step e) and at least part of the fermentation in step f) occur simultaneously. ### Claim 7 (depends on 1) The process of claim 1 wherein the additional steps is i) and all or substantially all of the first juice is used in washing second solids. ### Claim 8 (depends on 1) The process claim 1 wherein the washing is in one or more separation apparatuses. ### Claim 9 (depends on 1) The process claim 1 wherein step e) is subsequent to step d). ### Claim 10 A process for converting a cellulosic feedstock to one or more chemical compounds, comprising: a) processing the feedstock to form a first juice and a first solids comprising cellulose and hemicellulose; b) hydrolyzing at least part of the first solids to form a first liquid comprising one or more sugars and second solids comprising cellulose; c) separating in one or more separation apparatuses first liquid from second solids to form a first liquid portion comprising one or more sugars and a solids portion comprising cellulose; d) fermenting at least part of the one or more sugars in the first liquid portion to form a first fermentation mixture comprising one or more chemical compounds; e) saccharifying at least part of the solids portion to form a second mixture comprising one or more sugars; f) fermenting at least a portion of the sugars in the second mixture to form a second fermentation mixture comprising one or more chemical compounds; and at least one of the following additional steps: i) washing in the separation apparatus second solids with at least part of the first fermentation mixture; ii) adding at least a part of the first fermentation mixture to solids portion exiting the one or more separation apparatuses; iii) combining in a slurry vessel at least part of the first fermentation mixture with at least part of the solids portion comprising cellulose; iv) saccharifying solids portion in the presence of at least part of the first fermentation mixture; v) fermenting sugars in the second mixture in the presence of at least part of the first fermentation mixture; vi) processing the feedstock with at least part of the first fermentation mixture; and vii) hydrolyzing at least part of the first solids with at least part of the first fermentation mixture. ### Claim 11 (depends on 10) The process of claim 10 wherein the first juice comprises one or more sugars. ### Claim 12 (depends on 10) The process of claim 10 wherein the processing comprises pressing the feedstock to form the first juice and first solids, and washing the first solids with at least part of the first fermentation mixture. ### Claim 13 (depends on 10) The process of claim 10 comprising step ii) wherein the first fermentation mixture is added to the solids portion as the solids portion exits the one or more separation apparatuses and wherein the first fermentation mixture reduces the viscosity of the solids portion. ### Claim 14 (depends on 10) The process of claim 10 comprising step iii) wherein the first fermentation mixture reduces the viscosity of the solids portion. ### Claim 15 (depends on 10) The process of claim 10 wherein the additional step is iii). ### Claim 16 (depends on 15) The process of claim 15 wherein all or substantially all of the first fermentation mixture is combined with the solids portion comprising cellulose. ### Claim 17 (depends on 10) The process of claim 10 wherein at least part of the saccharifying in step e) and at least part of the fermentation in step f) occur simultaneously. ### Claim 18 (depends on 10) The process of claim 10 wherein the saccharifying is in the presence of at least part of the first fermentation mixture. ### Claim 19 (depends on 18) The process of claim 18 wherein step e) is subsequent to step d). ### Claim 20 A process for converting a cellulosic feedstock to one or more chemical compounds, comprising: a) processing the feedstock to form a first juice and a first solids comprising cellulose and hemicellulose; b) hydrolyzing at least part of the first solids to form a first liquid comprising one or more sugars and second solids comprising cellulose; c) separating in one or more separation apparatuses first liquid from second solids to form a first liquid portion comprising one or more sugars and a solids portion comprising cellulose; d) fermenting at least part of the one or more sugars in the first liquid portion to form a first fermentation mixture comprising one or more chemical compounds; e) saccharifying, in the presence of at least part of the first fermentation mixture, at least part of the solids portion to form a second mixture comprising one or more sugars; f) fermenting at least a portion of the sugars in the second mixture to form a second fermentation mixture comprising one or more chemical compounds; and at least one of the following additional steps: i) washing in the separation apparatus second solids with part of the second fermentation mixture; ii) adding part of the second fermentation mixture to solids portion exiting the one or more separation apparatuses; iii) combining in a slurry vessel a part of the second fermentation mixture with at least a part of the solids portion comprising cellulose; iv) processing the feedstock with part of the second fermentation mixture; and vi) hydrolyzing at least part of the first solids with part of the second fermentation mixture. ### Claim 21 (depends on 20) The process of claim 20 wherein the first juice comprises one or more sugars. ### Claim 22 (depends on 20) The process of claim 20 wherein the processing comprises pressing the feedstock to form the first juice and first solids, and washing first solids with part of the second fermentation mixture. ### Claim 23 (depends on 20) The process claim 20 wherein at least part of the saccharifying in step e) and at least part of the fermentation in step f) occur simultaneously. ### Claim 24 (depends on 30, 31, 32, 33) The process of any one of claims 30 through 33 wherein the saccharifying is in the presence of at least a portion of the first fermentation mixture. ### Claim 25 (depends on 24) The process of claim 24 wherein step e) is subsequent to step d). ### Claim 26 (depends on 1) The process claim 1 wherein the one or more chemical compounds is ethanol.