| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 549489000 | Preparation of furfural (i.e., furan-2-aldehyde) | 32 |
| 20090131690 | METHOD FOR THE SYNTHESIS OF 5-ALKOXYMETHYL FURFURAL ETHERS AND THEIR USE - Method for the manufacture of 5-alkoxymethylfurfural derivatives by reacting a fructose and/or glucose-containing starting material with an alcohol in the presence of a catalytic or sub-stoechiometric amount of solid (“heterogeneous”) acid catalyst. The catalysts may be employed in a continuous flow fixed bed or catalytic distillation reactor. The ethers can be applied as a fuel or fuel additive. | 05-21-2009 |
| 20090234142 | HIGH-YIELD CONVERSION OF CELLULOSIC BIOMASS INTO FURANIC BIOFUELS AND VALUE-ADDED PRODUCTS - Paper, cotton, corn stover, straw, and wood are converted into furanic products in high yields (based on their cellulose content) using a simple, inexpensive process involving concurrent hydrolysis, dehydration, and substitution reactions coupled with continuous extraction into an organic phase. In a simultaneous process, the hemicellulose fraction of these substrates is converted into furfural, and together these constitute an efficient means for the total exploitation of the carbohydrate content of biomass. | 09-17-2009 |
| 20100048924 | SOLVO-THERMAL HYDROLYSIS OF XYLOSE - The invention relates to a process for producing furfural from xylose comprising: (a) mixing an aqueous xylose solution containing xylose oligosaccharides with sub-critical or near-critical water to form a mixture at a first temperature and a first pressure; (b) maintaining the mixture at the first temperature and the first pressure for a first time period; and (c) rapidly cooling the mixture to a second temperature and a second pressure, wherein furfural is produced by the process (d) process can also be carried out with or without mixing of carbon dioxide with aqueous xylose solution before it is mixed with sub-critical or near-critical water to form a mixture at a first temperature and pressure. | 02-25-2010 |
| 20100317879 | METHODS FOR CONVERSION OF CARBOHYDRATES IN IONIC LIQUIDS TO VALUE-ADDED CHEMICALS - Methods are described for converting carbohydrates including, e.g., monosaccharides, disaccharides, and polysaccharides in ionic liquids to value-added chemicals including furans, useful as chemical intermediates and/or feedstocks. Fructose is converted to 5-hydroxylmethylfurfural (HMF) in the presence of metal halide and acid catalysts. Glucose is effectively converted to HMF in the presence of chromium chloride catalysts. Yields of up to about 70% are achieved with low levels of impurities such as levulinic acid. | 12-16-2010 |
| 20110137051 | PROCESS FOR RECOVERY OF FORMIC ACID - The invention relates to a process for the recovery of concentrated high purity formic acid having a concentration of at least 50%, most preferably at least 95%, from biomass wherein an aqueous liquid mixture containing levulinic acid and possibly furfural is subjected to a liquid-liquid extraction step, followed by the recovery of furfural, formic acid and levulinic acid. | 06-09-2011 |
| 20110144359 | METHOD FOR PRODUCING FURFURAL FROM LIGNOCELLULOSIC BIOMASS MATERIAL - A method for producing furfural from lignocellulosic biomass material is provided, comprising (a) contacting the lignocellulosic biomass material with a mixture comprising water and an organic acid at a temperature of at least 100° C. and a pressure of at most 10 bar (absolute) to obtain a first liquid stream comprising hydrolysed hemicellulose and a second stream comprising lignin and cellulose; (b) maintaining the first liquid stream comprising hydrolysed hemicellulose at a temperature of at least 130° C. to obtain a second liquid stream comprising furfural; and (c) separating the furfural obtained in step b) from the second liquid stream. | 06-16-2011 |
| 20110282079 | One-step catalytic conversion of biomass-derived carbohydrates to liquid fuels - The invention relates to a method for manufacture of hydrocarbon fuels and oxygenated hydrocarbon fuels such as alkyl substituted tetrahydrofurans such as 2,5-dimethyltetrahydrofuran, 2-methyltetrahydrofuran, 5-methylfurfural and mixtures thereof. The method generally entails forming a mixture of reactants that includes carbonaceous material, water, a metal catalyst and an acid reacting that mixture in the presence of hydrogen. The reaction is performed at a temperature and for a time sufficient to produce a furan type hydrocarbon fuel. The process may be adapted to provide continuous manufacture of hydrocarbon fuels such as a furan type fuel. | 11-17-2011 |
| 20120083611 | PROCESS FOR PRODUCING FURFURAL - A process is provided for producing furfural from solid biomass by gaseous acid catalysed hydrolysis and dehydration in the presence of superheated steam and one or more acid catalysts. The solid biomass is heated to a temperature which is sufficiently high to ensure that the superheated steam and the acid catalyst or catalysts to be used remain in gaseous form during the reaction. The heated solid biomass is contacted with a gaseous stream containing superheated steam and one or more acid catalysts to produce a furfural-containing gaseous stream containing superheated steam, one or more acid catalysts and furfural. The furfural-containing gaseous stream is recirculated to bring it into further contact with the heated solid biomass to enrich the concentration of furfural. | 04-05-2012 |
| 20120108829 | PROCESS FOR THE PRODUCTION OF FURFURAL FROM PENTOSES - The invention is directed to a process for the production of furfural from pentoses and/or water soluble pentosans, said process comprising converting the said pentoses and/or water soluble pentosans in aqueous solution in a first step to furfural and in a second step feeding the aqueous solution containing furfural obtained in the first step to the top of a distillation column to produce an aqueous, liquid downflow, which column is heated at the bottom to produce an upflow water vapour flow, recovering a gaseous water and furfural containing product stream from the top of the said column, compressing the said vapour flow and condensing it on the hot side of a reboiler at the bottom of the said column. | 05-03-2012 |
| 20120149924 | PROCESS FOR THE PRODUCTION OF FURFURAL FROM PENTOSES AND/OR WATER SOLUBLE PENTOSANS - The invention is directed to a process for production of furfural from pentoses and/or water-soluble pentosans, said process comprising converting said pentoses and/or water soluble pentosans in aqueous solution in a first step to furfural and in a second step feeding the aqueous solution containing furfural obtained in step one to the top of a distillation column to produce an aqueous, liquid downflow, which column is heated at the bottom part thereof, using at least one reboiler to produce an upflow steam flow, recovering a water and furfural containing vapor product stream from the top of said column, compressing said vapor flow and condensing it on the hot side of the reboiler at the bottom of said column to produce sufficient steam in said bottom part of the column to produce said upflow steam flow, and to recover an aqueous furfural containing solution as the condensate in the reboiler. | 06-14-2012 |
| 20120157697 | PROCESS FOR FURFURAL PRODUCTION FROM BIOMASS - Furfural is produced from a lignocellulosic feedstock comprising glucan and xylan. The feedstock is contacted with water in the presence of an acid catalyst. The resulting mixture is contacted with at least one water-immiscible organic solvent to form a mixture comprising an aqueous phase and an organic phase. Under suitable reaction conditions, furfural is produced and preferentially partitions into the organic phase, from which it may be recovered. | 06-21-2012 |
| 20120184756 | Production process of furfural from cellulose using as a solvent and catalyst an imidazolium sulphate or chloride in a reaction with simultaneous extraction with dibutyl ether - Furfural is a known component of both gasoline or diesel fuels as well as a chemical raw material. | 07-19-2012 |
| 20120330040 | CONTINUOUS PRODUCTION OF FURFURAL AND LEVULININC ACID - A process for continuously producing furfural and levulinic acid from biomass, said process comprising steps including pre-treatment of the biomass; hydrolysis and dehydration of the biomass; removing a vapour mixture by flashing the slurried biomass and a heat integration step comprising the water used being heated through a heat exchange system with the flashed vapour mixture. | 12-27-2012 |
| 20130030194 | Metal Catalyst Composition for Producing Furfural Derivatives from Raw Materials of Lignocellulosic Biomass, and Method for Producing Furfural Derivatives Using the Composition - The present invention relates to a metal catalyst composition for producing furfural derivatives from raw materials of lignocellulosic biomass, and method for producing furfural derivatives using the composition. The present invention comprises ruthenium chloride (RuCl | 01-31-2013 |
| 20130109869 | PRODUCTION OF FURFURAL FROM BIOMASS | 05-02-2013 |
| 20130172581 | PROCESS FOR THE PRODUCTION OF FURFURAL - Furfural is produced by mixing an aqueous feedstock solution containing C | 07-04-2013 |
| 20130172582 | PROCESSES FOR MAKING FURFURALS - Processes for making furfural and 5-hydroxymethylfurfural from sugars are provided. The processes can be carried out using a batch process or a continuous mode of operation. An aqueous sugar solution is pressurized with CO | 07-04-2013 |
| 20130172583 | PROCESS FOR THE PRODUCTION OF FURFURAL - Furfural is produced by contacting a feedstock solution containing C | 07-04-2013 |
| 20130172584 | PROCESS FOR THE PRODUCTION OF FURFURAL - Furfural is produced by mixing an aqueous feedstock solution containing C | 07-04-2013 |
| 20130172585 | PROCESS FOR THE PRODUCTION OF FURFURAL - Furfural is produced by contacting an aqueous feedstock solution containing C | 07-04-2013 |
| 20130317239 | METHOD FOR PRODUCING 2-FURALDEHYDE - An object of the present invention is to provide a method for suppressing the corrosion of a reactor and reducing waste in the production of 2-furaldehyde from a sugar raw material containing a hexose as a constituent component, and another object of the invention is to provide an industrially advantageous method for producing 2-furaldehyde, which suppresses a decrease in the activity of a catalyst in a case of using an acid catalyst and provides a higher yield. The present invention relates to a method for producing 2-furaldehyde comprising heating a sugar raw material containing a hexose as a constituent component in an aprotic polar solvent in the presence of a solid acid catalyst. | 11-28-2013 |
| 20140018555 | PROCESS FOR THE PRODUCTION OF FURFURAL AND LEVULINIC ACID FROM LIGNOCELLULOSIC BIOMASS - A process for producing furfural and levulinic acid from lignocellulose-comprising biomass is disclosed. The biomass is slurried using water and optionally an acid, subjected to hydrolysis, and then subjected to a solid/liquid separation to yield at least an aqueous fraction comprising C5 and C6 sugars and a solid fraction comprising cellulose and lignin. Furfural is obtained by adding an organic solvent to the aqueous fraction, heating at 120-220° C. for a sufficient time to form furfural, cooling, and separating an organic phase comprising at least part of the furfural from an aqueous phase. Levulinic acid is obtained by suspending the solid fraction in water and optionally an acid, heating the suspension to 140-220° C., and separating an aqueous fraction comprising the levulinic acid from a solid fraction. | 01-16-2014 |
| 20140051873 | METHODS FOR FURFURAL PRODUCTION FROM BRANCHED NON-FERMENTABLE SUGARS IN STILLAGE OR SYRUP - Furfural is obtained selectively and in good purity from non-fermentable branched sugars found in soluble waste streams of lignocellulosic biomass. In a monophasic method, stillage or syrup is contacted with water and an acid catalyst under suitable reaction conditions to convert the branched non-fermentable branched sugars to furfural. Additionally, the stillage or syrup can be treated with a water-immiscible organic solvent to form a biphasic mixture comprising an aqueous phase and an organic phase. The furfural that is produced preferentially partitions into the organic phase, from which it may be recovered. | 02-20-2014 |
| 20140163245 | PROCESS FOR PRODUCING FURFURAL FROM BLACK LIQUOR - A process for making furfural using papermaking black liquor from the kraft pulping process as a feed material. First, the lignin is removed from the black liquor by carbonizing the black liquor to a pH below pH 10 to insolubilize the lignin, neutralize NaOH and other inorganic components of the black liquor. The next step is to treat the carbonated black liquor that contains the hemicellulose to remove the high molecular weight components. In a preferred embodiment the treatment uses multiple sequential steps. The first step of the treatment is to use ultrafiltration, centrifugation or dissolved-air floatation to separate the high molecular weight components. The second filtration is to pass the hemicellulose containing black liquor stream through a nanofilter to remove low molecular weight components. The conversion of xylans in the hemicellulose-containing mixture to furfural is accomplished using a catalytic process. The xylans are converted to pentose sugars and then converted to furfural. The furfural is formed at a low concentration and then further concentrated. | 06-12-2014 |
| 20140171664 | FURFURAL PRODUCTION FROM BIOMASS - Furfural is produced from a xylan-containing lignocellulosic feedstock which is contacted with water in the presence of an acid catalyst. Specifically, the catalyst is sulfuric acid characterized by a room temperature pH in the range of about 0.2 to about 0.6. The use of sulfuric acid in place of phosphoric lowers costs and avoids the high viscosity of very low pH phosphoric acid. | 06-19-2014 |
| 20140309440 | Method for Preparing Furfural - The invention relates to a method for preparing furfural by reacting pentose in water and in the presence of carboxylic acid and of a heterogeneous acid catalyst, the method being conducted in an aqueous solution of carboxylic acid as a reaction medium. The present invention also relates to the preparation of furfural by reaction of pentose in water and in the presence of carboxylic acid and of a heterogeneous acid catalyst. The invention also relates to an aqueous solution of carboxylic acid rich in furfural. | 10-16-2014 |
| 20150031904 | Method for Producing 5-Hydroxymethyl-2-Furfural from Maize Syrup Containing Fructose - Provided herein is a method for producing 5-hydroxymethyl-2-furfural (HMF) from maize syrup containing fructose including a conversion step in which a reaction product containing the 5-hydroxymethyl-2-furfural is produced by mixing and heating the maize syrup, a dioxane solvent and a solid acid catalyst, thus providing an advantage that the solvent can be easily isolated and the isolated solvent can be reused because dioxane is used as the solvent, and an advantage that the catalyst can be easily isolated and the isolated catalyst can be easily reused because a nonuniform solid acid catalyst is used. | 01-29-2015 |
| 20170233359 | ENERGY-EFFICIENT AND ENVIRONMENTALLY FRIENDLY PROCESS FOR THE PRODUCTION OF TARGET CHEMICAL COMPOUNDS FROM CELLULOSIC MATERIAL | 08-17-2017 |
| 20170233360 | CLOSED-LOOP PRODUCTION OF FURFURAL FROM BIOMASS | 08-17-2017 |
| 20170233361 | PROCESS FOR THE MANUFACTURE OF FURURAL AND FURFURAL DERIVATIVES | 08-17-2017 |
| 20170233362 | ONE-STEP PRODUCTION OF FURFURAL FROM BIOMASS | 08-17-2017 |
| 20190144409 | LIGNIN-BASED SOLVENTS AND METHODS FOR THEIR PREPARATION | 05-16-2019 |
