Class / Patent application number | Description | Number of patent applications / Date published |
549488000 | Additional chalcogen attached indirectly to the hetero ring by nonionic bonding | 38 |
20080200698 | PROCESS FOR PREPARING 5-HYDROXYMETHYLFURFURAL VIA 5-ACYLOXYMETHYLFURFURAL AS AN INTERMEDIATE - 5-hydroxymethylfurfural of the formula II | 08-21-2008 |
20090018352 | Method for purifying hydroxymethylfurfural using non-functional polymeric resins - Disclosed are methods of at least partially purifying HMF from an aqueous mixture containing reactants and products of HMF synthesis from fructose that relies on use of non-functional polymeric resins. A first type of non-functional polymeric resin preferentially adsorbs HMF relative to fructose and is used to remove a majority of fructose from the reaction mixture. HMF is desorbed from the first non-functional polymeric resin with an organic solvent such as acetone. A second type of non-functional polymeric resin preferential adsorbs furfural from an aqueous reaction mixture allowing HMF to pass through. In one embodiment, these non-functional polymeric resins may be used alone in combination with each other to obtain HMF of high purity. In other embodiments, one or more of the foregoing non-functional polymeric resin resins is used in combination with cation exchange chromatography to still further purify the HMF. | 01-15-2009 |
20090030215 | METHOD FOR PRODUCTION OF 5-HYDROXYMETHYL-2-FURFURAL FROM FRUCTOSE - A method of producing HMF by mixing or agitating an aqueous solution of fructose and inorganic acid catalyst with a water immiscible organic solvent to form an emulsion of the aqueous and organic phases. The mixture is heated in a flow-through reactor at elevated pressures and then separated into aqueous and organic phases to obtain HMF. The aqueous phase and the organic phase are mixed with an in-line mixer prior to, preferably, immediately before addition of the biphasic reaction mixture into the reactor. After separation, HMF is recovered from the aqueous and organic phases to obtain high yields of HMF without the presence of insoluble solid impurities. | 01-29-2009 |
20090156841 | CONVERSION OF CARBOHYDRATES TO HYDROXYMETHYLFURFURAL (HMF) AND DERIVATIVES - A method of producing substantially pure HMF, HMF esters and other derivatives from a carbohydrate source by contacting the carbohydrate source with a solid phase catalyst. A carbohydrate starting material is heated in a solvent in a column and continuously flowed through a solid phase catalyst in the presence of an organic acid, or heated with the organic acid and a solid catalyst in solution to form a HMF ester. Heating without organic acid forms HMF. The resulting product is purified by filtration to remove the unreacted starting materials and catalyst. The HMF ester or a mixture of HMF and HMF ester may then be oxidized to 2,5-furandicarboxylic acid (FDCA) by combining the HMF ester with an organic acid, cobalt acetate, manganese acetate and sodium bromide under pressure. Alternatively, the HMF ester may be reduced to form a furan or tetrahydrofuran diol. | 06-18-2009 |
20090281338 | PROCESSES FOR THE PREPARATION AND PURIFICATION OF HYDROXYMETHYLFURALDEHYDE DERIVATIVES - A method for utilizing an industrially convenient fructose source for a dehydration reaction converting a carbohydrate to a furan derivative is provided. Recovery methods also are provided. Embodiments of the methods improve upon the known methods of producing furan derivatives. | 11-12-2009 |
20100152470 | Hydroxymethyl Furfural Oxidation Methods - A method of oxidizing hydroxymethylfurfural (HMF) includes providing a starting material which includes HMF in a solvent comprising water into a reactor. At least one of air and O | 06-17-2010 |
20100191004 | SYSTEMS AND METHODS FOR PRODUCING FUELS AND FUEL PRECURSORS FROM CARBOHYDRATES - The present invention relates to systems and methods for producing fuels and fuel precursors from carbohydrates. In an embodiment the invention includes a method of producing 5-hydroxymethylfurfural (HMF), including contacting a saccharide with a metal oxide catalyst at a temperature of greater than about 100 degrees Celsius. In an embodiment the invention includes a method of producing a biofuel including contacting a saccharide with a metal oxide catalyst at a temperature of greater than about 100 degrees Celsius. Other embodiments are also described herein. | 07-29-2010 |
20110071306 | BIOMASS REFINING BY SELECTIVE CHEMICAL REACTIONS - A method is disclosed for the acid hydrolysis of carbohydrates in or from biomass, using a solvent system including an aqueous ether, where the ether form a majority of the system, which affords high yields to the platform chemicals such as 2-furfural and 5-hydroxymethylfurfural (5-HMF). The later can also undergo a domino reaction to chemicals including levulinic acid, particularly with oxygenated anions and greater water content. A total dissolution and reaction of biomass occurs under a range of relatively mild conditions (combined Severity range ˜2.2-2.6). Lignin and lignin derived products can be easily separated by precipitation. | 03-24-2011 |
20110082304 | METHOD FOR THE SYNTHESIS OF 5-HYDROXYMETHYLFURFURAL ETHERS AND THEIR USE - Method for the manufacture of 5-hydroxymethylfurfural derivatives by reacting a fructose and/or glucose-containing starting material with an alcohol in the presence of a catalytic or sub-stoichiometric 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. | 04-07-2011 |
20120004430 | PRODUCTION OF HYDROXYMETHYLFURFURAL - The invention provides a process for making hydroxymethylfurfural comprising exposing a saccharide, e.g. glucose or fructose, to a metal complex of an N-heterocyclic carbene. | 01-05-2012 |
20120016141 | METHOD AND APPARATUS FOR PREPARING HYDROXYMETHYLFURFURAL - In an embodiment of the invention, an apparatus for preparing hydroxymethylfurfural (HMF) is provided. The apparatus includes a reaction area including a first organic layer including sugar and a solvent and a second organic layer including a solvent mixture with azeotropy and extractability, a boiling area including a mixing solution formed by the hydroxymethylfurfural and the solvent mixture, connected with the reaction area, and a distilling area including water and a liquid layer including the solvent mixture, connected to the reaction area. In another embodiment of the invention, a method for preparing hydroxymethylfurfural (HMF) is provided. | 01-19-2012 |
20120083610 | 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 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. | 04-05-2012 |
20120172607 | Method For Preparing Hydroxymethylfurfural - A method for preparing hydroxymethylfurfural, which includes: a) mixing and dissolving triose or its derivatives and solvent 1 to obtain the first reaction mixture; b) reacting the obtained first reaction mixture with Alkaline Catalyst 1 to condense into hexose; c) mixing and dissolving the resulting hexose and solvent 2 to obtain the second reaction mixture; d) adding acid catalyst 2 to the second reaction mixture, then heating the second reaction mixture at 80˜280° C. to form the third reaction mixture including hydroxymethylfurfural; e) obtaining the hydroxymethylfurfural separating by separating from the third mixture. The method is a new synthetic way for preparing 4-hydroxymethylfurfural and 5-hydroxymethylfurfural. | 07-05-2012 |
20120330039 | METHOD FOR DEHYDRATING A CARBOHYDRATE-COMPRISING COMPOSITION - The present invention relates to a method for dehydrating a carbohydrate-comprising composition. | 12-27-2012 |
20130023679 | PREPARATION OF FURFURAL COMPOUNDS, AND MIXTURE FOR PREPARING THE SAME - A method of preparing furfural compounds and a mixture for preparing the same are disclosed. First, a solution is prepared by mixing an organic ammonium salt and a hydroxyl organic solvent. Then, a carbohydrate is mixed with the solution to form a mixture. The mixture is heated to a reaction temperature for conversion of the carbohydrate to produce the furfural compounds. | 01-24-2013 |
20130085285 | METHOD FOR THE MANUFACTURE OF FURAN COMPOUNDS FOR RENEWABLE PRIMARY PRODUCTS - Method for the manufacture of furan compounds by using a heterogeneous catalyst in aqueous solution. | 04-04-2013 |
20130150595 | LEWIS AND BRONSTED-LOWRY ACID-CATALYZED PRODUCTION OF 5-HYDROXYMETHYLFURFURAL (HMF) FROM GLUCOSE - Described is a process to make hydroxymethylfurfural (HMF) from glucose. The process includes the steps of reacting a feedstock solution comprising glucose, in the presence of a homogeneous Brønsted acid catalyst and a homogeneous Lewis acid catalyst, in a reaction vessel containing a biphasic reaction medium. The reaction medium includes an aqueous reaction solution and a substantially immiscible organic extraction solution. HMF is produced in the aqueous reaction solution and extracted into the organic extraction solution. | 06-13-2013 |
20130150596 | PRODUCTION OF 5 HYDROXYMETHYULFURFURAL (HMF) FROM HEXOSE SOLUTIONS IN THE PRESENCE OF STEAM - Method for producing 5-hydroxymethylfurfural (HMF), wherein
| 06-13-2013 |
20130150597 | PREPARATION OF 5-HYDROXYMETHYLFURFURAL (HMF) FROM SACCHARIDE SOLUTIONS IN THE PRESENCE OF A SOLVENT HAVING A BOILING POINT GREATER THAN 60 C AND LESS THAN 200 C (AT STANDARD PRESSURE, CALLED LOW BOILER FOR SHORT) - A process for preparing 5-hydroxymethylfurfural (HMF), which comprises
| 06-13-2013 |
20130281719 | METHOD OF CATALYTIC CONVERSION OF CARBOHYDRATES INTO 5-HYDROXYMETHYLFURFURAL - The present invention relates to a method for efficient conversion of carbohydrates into 5-hydroxymethylfurfural (HMF) in the presence of tantalum-containing solid acid, which shows good activity and high selectivity for HMF preparation from saccharides. The catalyst is stable in aqueous system which makes it as an ideal catalyst for HMF production. High HMF yield was obtained even in mild condition. The catalysts of the invention are advantageous in that they are environment-friendly, easy separation and recovery, can be re-used in subsequent reactions, do not corrode reaction reactors. These features make the catalyst as an ideal catalyst for HMF preparation and have strong industrial application significance. | 10-24-2013 |
20130310579 | PROCESSES FOR PREPARING DIACIDS, DIALDEHYDES AND POLYMERS - Alcohols are catalytically oxidized to aldehydes, in particular to benzaldehyde and diformylfuran, which are useful as intermediates for a multiplicity of purposes. The invention also relates to the polymerization of the dialdehyde and to the decarbonylation of the dialdehyde to furan. | 11-21-2013 |
20140100378 | UTILIZING A MULTIPHASE REACTOR FOR THE CONVERSION OF BIOMASS TO PRODUCE SUBSTITUTED FURANS - The present disclosure provides methods to produce substituted furans (e.g., halomethylfurfural, hydroxymethylfurfural, and furfural), by acid-catalyzed conversion of biomass using a gaseous acid in a multiphase reactor, such as a fluidized bed reactor. | 04-10-2014 |
20140121389 | Method for Producing 5-Hydroxymethylfurfural - The invention relates to a method for preparing 5-hydroxymethylfurfural (HMF) by reacting hexose in water and in the presence of carboxylic acid. The present invention further relates to the preparation of 5-hydroxymethylfurfural (HMF) by reacting hexose in water and in the presence of carboxylic acid and of a heterogenous acid catalyst. The invention also relates to an HMF-rich carboxylic acid solution. | 05-01-2014 |
20140128625 | METHOD OF PREPARING FURFURAL COMPOUNDS - Provided is a two-step method of producing a compound of chemical formula 1 in the presence of an alcohol solvent and a Group 3B metal catalyst or a salt thereof, comprising a first step comprising alkylation or isomerization of an aldohexose-containing substrate to obtain an intermediate, and a second step comprising dehydration of the intermediate to produce a compound of chemical formula 1. Preferably, additional solvent and/or catalyst are not added in the second step. | 05-08-2014 |
20140235881 | METHOD FOR PRODUCING 5-HYDROXYMETHYL-2-FURFURAL OR ALKYL ETHER DERIVATIVES THEREOF USING AN ION EXCHANGE RESIN IN THE PRESENCE OF AN ORGANIC SOLVENT - The present invention relates to a method for producing a furan-based compound using an ion exchange resin in the presence of an organic solvent. In the method for producing a furan-based compound according to the present invention, a furan-based compound is made from an aldose-type hexose compound in the presence of an organic solvent by using an anion exchange resin and a cation exchange resin. Thus, the aldose-type hexose compound obtained from biomass by simultaneously or consecutively using the anion/cation exchange resins as catalysts can be made into 5-hydroxymethyl-2-furfural (HMF) or alkyl ether derivatives thereof such as 5-alkoxymethyl-2-furfural (AMF) without using an expensive reagent. Also, since the selection of an organic solvent is not limitative and a heterogeneous catalyst can be used, separation and purification is easy and chemically stable AMF can be directly obtained. Further, the conversion efficiency of the aldose-type hexose compound is excellent, and the hexose compound can be used at a high concentration. | 08-21-2014 |
20140357878 | METHOD OF PRODUCING 5-HYDROXYMETHYLFURFURAL FROM CARBOHYDRATES - Disclosed herein is a process for preparing 5-hydroxymethylfurfural comprising the step of contacting a carbohydrate and a Brønsted acid in an alcoholic solvent comprising an alcohol selected from the group consisting of secondary alcohols, tertiary alcohols, aryl alcohols and combinations thereof under conditions to dehydrate the carbohydrate thereby forming a reaction product containing 5-hydroxymethylfurfural. | 12-04-2014 |
20140371473 | Process for the Preparation of 5-Hydroxymethylfurfural (HMF) - A process is described for the preparation of 5-hydroxymethylfurfural (HMF), which comprises the following steps:
| 12-18-2014 |
20150025256 | Purification of 5-Hydroxymethylfurfural (HMF) by Crystallization - This invention relates to an efficient procedure for purifying HMF by crystallization at low temperature from an organic solvent. | 01-22-2015 |
20150087848 | ACID-FUNCTIONALIZED POLYOLEFIN MATERIALS AND THEIR USE IN ACID-PROMOTED CHEMICAL REACTIONS - An acid-functionalized polyolefin material that can be used as an acid catalyst in a wide range of acid-promoted chemical reactions, wherein the acid-functionalized polyolefin material includes a polyolefin backbone on which acid groups are appended. Also described is a method for the preparation of the acid catalyst in which a precursor polyolefin is subjected to ionizing radiation (e.g., electron beam irradiation) of sufficient power and the irradiated precursor polyolefin reacted with at least one vinyl monomer having an acid group thereon. Further described is a method for conducting an acid-promoted chemical reaction, wherein an acid-reactive organic precursor is contacted in liquid form with a solid heterogeneous acid catalyst comprising a polyolefin backbone of at least 1 micron in one dimension and having carboxylic acid groups and either sulfonic acid or phosphonic acid groups appended thereto. | 03-26-2015 |
20150354019 | CONTINUOUS PROCESSES FOR HYDROLYZING HEMICELLULOSES FROM LIGNOCELLULOSIC MATERIALS WITH CLEANING SYSTEM - A continuous process for producing hemicellulose sugars from a biomass extraction liquor is provided. A system is configured for continuously producing hemicellulose sugars and/or hemicellulose derivatives from a biomass extraction liquor, the system comprising at least a first hydrolysis reactor and a second hydrolysis reactor. Each of the hydrolysis reactors is in switchable communication with (i) an operating feed stream of a biomass extraction liquor containing water, hemicellulose oligomers, and dissolved or suspended lignin, and (ii) a cleaning feed stream of a cleaning agent selected from the group consisting of steam, an alkaline solution, an organic solvent, and combinations thereof. The cleaning agent dissolves precipitated lignin formed from the lignin under the hydrolysis reaction conditions. | 12-10-2015 |
20150368218 | OXIDATION OF ALCOHOL COMPOUNDS VIA MESOSTRUCTURED VPO CATALYSTS - The present invention concerns a process for the production of an aldehyde compound by an oxidation reaction of an alcohol compound in the presence of a mesostructured vanadium phosphorus mixed oxide catalyst, at a temperature comprised between 50° C. and 200° C., in presence of an oxidant. The reaction medium may also comprise a solvent. | 12-24-2015 |
20160009675 | PROCESS FOR MAKING HMF FROM SUGARS WITH REDUCED BYPRODUCT FORMATION, AND IMPROVED STABILITY HMF COMPOSITIONS | 01-14-2016 |
20160060141 | METHOD FOR TREATMENT OF PROCESS WATER - Within the scope of hydrothermal carbonization of biomass, not only the main product, coal, but also the platform chemical 5-hydroxymethyl furfural, as well as furfural and levulinic acid, are formed. These are extracted from the process water of the carbonization reaction. However, in this connection, the problem exists that humic substances deposit on the container walls of the extraction column and can only be removed again by means of great cleaning effort. Furthermore, oligomers clearly worsen the purity of the product. This problem is solved by a filtration cascade through which the process water passes before extraction. In this connection, first the impurities mentioned are removed in a first filtration stage, and the remaining products and educts are separated from one another in a second filtration stage. Only the products are passed to extraction. | 03-03-2016 |
20160096813 | TETRAHYDROFURAN-2,5-DICARBALDEHYDES (DIFORMYL-TETRAHYDROFURAN, DFTHF) AND PROCESS FOR MAKING THE SAME - Tetrahydrofuran-(THF)-2,5-dicarbaldehyde and a process of preparing the same are described. The process involves reacting THF-diols in an inert organic solvent with an oxidizing agent at a temperature up to about 50 C. The process can use either HMF or THF-diols as starting materials, and enables a single-step conversion of THF-diols into a precursor material that can be transformed into a multitude of furanic derivative compounds. THF dicarbaldehyde can be modified according to certain reaction processes to generate either new or existing derivative compounds. | 04-07-2016 |
20160115142 | PROCESS FOR THE SYNTHESIS OF 5-HYDROXYMETHYLFURFURAL FROM SACCHARIDES - This invention relates to a process for the synthesis of 5-hydroxymethylfurfural (HMF) from saccharides. In particular this invention relates to a process for the dehydration of monosaccharides having 6 carbon atoms (haxoses), disaccharides, oligosaccharides, and polysaccharides deriving to yield highly pure 5-hydroxymethylfurfural (HMF) in high yield. | 04-28-2016 |
20160122450 | SYNTHESIS OF A SUBSTITUTED FURAN - The present invention provides a polymer comprising an aliphatic backbone having a plurality of aromatic rings bonded thereon, said plurality of aromatic rings comprising a first aromatic ring type that has an alkyl halide group substitution on the aromatic ring and a second aromatic ring type that has an optionally substituted ammonium halide group substitution on the aromatic ring. The present invention also provides a method for making an optionally substituted furan, the method comprising the step of subjecting a sugar to a dehydration reaction in the presence of a catalyst comprising said polymer. | 05-05-2016 |
20160168107 | UTILIZING A MULTIPHASE REACTOR FOR THE CONVERSION OF BIOMASS TO PRODUCE SUBSTITUTED FURANS | 06-16-2016 |
20170233363 | PROCESS FOR THE PRODUCTION AND ISOLATION OF 5-HYDROXYMETHYLFURFURAL | 08-17-2017 |