Provided are solid forms of 5-(halomethyl)furfural, including a crystalline form of 5-(chloromethyl)furfural. Provided are also methods for preparing solid forms of 5-(halomethyl)furfural by crystallization using certain solvents.

Provided herein are methods of producing dialkylfurans, such as 2,5-dimethylfuran, and other alkyl furans, such as 2-methylfuran. For example, 2,5-dimethylfuran may be produced by hydrogenation of (5-methylfuran-2-yl) methanol or 2-(chloromethyl)-5-methylfuran in the presence of a solid supported metal catalyst having an excess of either basic or acidic sites (as determined by chemisorption of CO2 or NH3). The process could further include a urea reagent (TMU, DMPU, TMI) and an alkyl benzene.

The present invention relates to an improved process for the preparation of 2,5-dimethylfuran and furfuryl alcohol over ruthenium supported catalysts. Further, the present invention disclosed a process for the selective hydrogenolysis of biomass derived 5-hydroxymethylfurfural (HMF) into 2,5-dimethylfuran (DMF) using Ru nanoparticles supported on NaY zeolite as a catalyst.

The present invention relates to an improved process for the preparation of 2,5-dimethylfuran and furfuryl alcohol over ruthenium supported catalysts. Further, the present invention disclosed a process for the selective hydrogenolysis of biomass derived 5-hydroxymethylfurfural (HMF) into 2,5-dimethylfuran (DMF) using Ru nanoparticles supported on NaY zeolite as a catalyst.

A process for the production of furfural from a biphasic composition including furfural, an organic solvent and soluble organic debris. The said process includes subjecting the biphasic composition to a liquid-liquid separation step to provide an organic phase and an aqueous phase. The organic phase includes the organic solvent, a first portion of the furfural and a first portion of soluble organic debris. The aqueous phase includes a remainder portion of the furfural and a remainder portion of soluble organic debris. The organic phase is subjected to a distillation step to provide a furfural stream and an organic solvent stream including the organic solvent and the first portion of the soluble organic debris. The organic solvent stream is conveyed to an adsorption unit to adsorb a second portion of the soluble organic debris, forming an organic debris-depleted recycle stream.

A process for the production of furfural from a biphasic composition including furfural, an organic solvent and soluble organic debris. The said process includes subjecting the biphasic composition to a liquid-liquid separation step to provide an organic phase and an aqueous phase. The organic phase includes the organic solvent, a first portion of the furfural and a first portion of soluble organic debris. The aqueous phase includes a remainder portion of the furfural and a remainder portion of soluble organic debris. The organic phase is subjected to a distillation step to provide a furfural stream and an organic solvent stream including the organic solvent and the first portion of the soluble organic debris. The organic solvent stream is conveyed to an adsorption unit to adsorb a second portion of the soluble organic debris, forming an organic debris-depleted recycle stream.

The present invention provides a method of preparing a furan derivative comprising the steps of (a) converting a monosaccharide to provide a keto-intermediate product; and (b) dehydrating the keto-intermediate product to provide a furan derivative; wherein the keto-intermediate product is pre-disposed to forming keto-furanose tautomers in solution. The method may further comprising a step of oxidizing the furan derivative to provide a furandicarboxylic acid or a furandicarboxylic acid derivative.

The present invention provides a method of preparing a furan derivative comprising the steps of (a) converting a monosaccharide to provide a keto-intermediate product; and (b) dehydrating the keto-intermediate product to provide a furan derivative; wherein the keto-intermediate product is pre-disposed to forming keto-furanose tautomers in solution. The method may further comprising a step of oxidizing the furan derivative to provide a furandicarboxylic acid or a furandicarboxylic acid derivative.

A process for producing 5-hydroxymethylfurfural (HMF) including a) a step of converting a carbohydrate into HMF, the converting step including providing a reaction medium including carbohydrate, catalyst, water, tetrahydrofuran (THF), and salt to form a biphasic solvent system including an aqueous phase and a THF phase and b) a step of separating the THF phase and the aqueous phase, to provide a separate THF phase and a separate aqueous phase, wherein an organic quaternary ammonium salt is present. The process results in a high conversion of carbohydrate and in the formation of HMF in high selectivity with low formation of side products, together with an efficient extraction of HMF into the THF phase.

Systems and method for production of furfural comprising combining a xylose-containing solution with an extraction solution comprising water-insoluble boronic acid to provide a first combined solution comprising an aqueous phase and a non-aqueous phase, said non-aqueous phase comprising xylose-diboronate ester (BA.sub.2X); combining at least a portion of the non-aqueous phase with an ionic conversion solution having a pH of less than or equal to 4 and comprising one or more salts to form a second combined solution, wherein the ionic conversion solution has a calculated molar ionic strength of at least 1, heating the second combined solution to convert at least a portion of the xylose-diboronate ester into furfural; separating the second combined solution into a second aqueous phase comprising from a second non-aqueous phase and recovering furfural from the second non-aqueous phase.