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388 results about "Hexose" patented technology

In bio-organic chemistry, a hexose is a monosaccharide with six carbon atoms, having the chemical formula C₆H₁₂O₆. Hexoses are classified by functional group, with aldohexoses having an aldehyde at position 1, and ketohexoses having a ketone at position 2.

Integrated process for separation of lignocellulosic components to fermentable sugars for production of ethanol and chemicals

A continuous and modular process converts lignocellulosic materials for the production of ethanol principally and / or chemicals such as methanol, butanediol, propanediol, hydrocarbon fuel, etc. Renewable lignocellulosic biomass such as but not all inclusive hardwoods (gum, beech, oak, sweet gum, poplar, eucalyptus, etc.), soft woods (pines, firs, spruce, etc.), corn stovers, straws, grasses, recycled papers, waste products from pulp and paper mills, etc can be used as feedstock. The process is designed to be modular and the feed entry point can be selected to adapt to different biomass feedstock. Lignocellulosic biomass such as hardwood and softwood are subjected to chemical / pressure treatment stages using potent and selective chemicals such as sodium chlorite / acetic acid (anhydrous) and chlorine / chlorine dioxide to separate the main components—lignin, cellulose (glucose) and hemicelluloses (xylose, arabinose, galactose)—into three process streams. The separated carbohydrates are further subjected to washing, cleaning, neutralization, and / or mild hydrolysis and subsequently fermented to produce ethanol. Residual lignin and extractives remained with the cellulose are removed by chemical treatment steps to enhance the fermentations of cellulose. Pre-hydrolysate after neutralization to neutralize and remove toxic components such as acetic acid, furfural, phenolics, etc. containing (xylose, arabinose, galactose) and hexoses (glucose) can be either separately or together with the purified cellulosic fraction fermented to produce ethanol. Approximately 100 gallons of ethanol, suitable to be used as a fuel, can be produced from one dried ton of wood. Significant amount of lignin are separated as a by-product and can be converted to hydrocarbon fuel, surfactant, drilling aid, or can be incinerated for generation of power and steam.
Owner:NGUYEN XUAN NGHINH

Method for preparing 5-hydroxymethyl-furfural

The invention relates to a method for preparing 5-hydroxymethylfurfural (HMF) by transforming a biomass saccharine source. The method comprises the following concrete steps: using an ionic liquid as a solvent, hexose or hexose source biomass as a raw material substrate, and acid as a catalyst, heating the mixture to react for 5 minutes to 20 hours at normal pressure, and then depressurizing and distilling the mixture under the condition that an operation temperature is not higher than 180 DEG C to obtain the HMF after the reaction is ended; and after the distilled remainder is cooled, directly adding the remainder into the biomass saccharine source, and repeating the processes of reaction and separation to obtain the HMF, so as to realize recycling of an ionic liquid catalyst system and semi-continuous preparation of the HMF. By using the method, once through yield of the HMF reaches as high as 94 percent. The method has the advantages of high selectivity, low acid consumption, mild condition, quick reaction, reusability of the ionic liquid, low cost, simple process, environmental protection, semi-continuous production and the like, and provides new technology for industrialized production of the HMF by transforming the biomass saccharine source, so as to develop a new path for preparing common chemicals in a large scale by using biomass resources and replacing fuels.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

Organic material production system using biomass material and method

An organic material production system using biomass material includes: a hydrothermal decomposition apparatus (13) that causes the biomass material (11) and hot compressed water (12) to countercurrently contact with each other and undergo hydrothermal decomposition, and that transfers a lignin component and a hemicellulose component into the hot compressed water, so as to separate the lignin component and the hemicellulose component from a biomass solid residue; a cellulose enzymatic saccharification device (17) that treats, with an enzyme, cellulose in the biomass solid residue, so as to enzymatically saccharify the cellulose to a first sugar solution containing hexose; an alcohol fermenter (18) that produces alcohols by fermentation using the obtained first sugar solution; a sulfuric acid decomposition device (33) that decomposes, with sulfuric acid, the hemicellulose component in hot water (30) discharged from the hydrothermal decomposition apparatus, which contains the eluted lignin component and the eluted hemicellulose component, so as to decompose the hemicellulose component to a second sugar solution containing pentose; and a second alcohol fermenter (34) that produces, using the second sugar solution containing pentose, alcohols by fermentation.
Owner:MITSUBISHI HITACHI POWER SYSTEMS ENVIRONMENTAL SOLUTIONS LTD

Catalyst for synthesizing 5-hydroxymethylfurfural by hexose dehydration and method for synthesizing 5-hydroxymethylfurfural

The invention discloses a catalyst for synthesizing 5-hydroxymethylfurfural by hexose dehydration and a method for synthesizing the 5-hydroxymethylfurfural by using the catalyst. The catalyst consists of iron halide and ammonium halide, and the molar ratio of the iron halide to the ammonium halide is 0.1 to 10. The synthesizing method comprises the following steps: dissolving a reaction substrate into a solvent, adding the catalyst consisting of the iron halide and the ammonium halide into the solution, reacting the solution for 0.5 hour at the temperature of between 0 and 200 DEG C, distilling and condensing the solution, performing extraction, distilling the concentrate under reduced pressure, drying the distillate and collecting a product. The catalyst of the invention overcomes the defects that the catalyst in the prior art has large toxicity and the catalytic reaction needs a large amount of organic solvent and additive. The catalyst totally shows the characteristic of a homogeneous catalyst in the reaction process, and has high catalytic activity and high selectivity; and the using amount of the catalyst can be optimized to trace so as to facilitate the separation and purification of the reaction product. The catalyst has the advantages of simple reaction system, environment friendliness, low toxicity, low production cost and easy post treatment.
Owner:TIANJIN UNIV
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