1354 results about "Xylose" patented technology

Lignin polymers having distinctive properties, including a generally high molecular weight and generally homogeneous size distribution, as well as preservation of native reactive side groups, are isolated by solvent extraction of plant materials. Methods for isolation of lignin polymers, and for use of the isolated lignin polymers are disclosed. Compositions containing lignin isolated from plant materials, such as carbon fiber composites, resins, adhesive binders and coatings, polyurethane-based foams, rubbers and elastomers, plastics, films, paints, nutritional supplements, food and beverage additives are disclosed. Xylose and xylose derivatives, furfural, fermentable sugars, cellulose and hemi-cellulose products may be used directly or further processed. The lignin polymers and other plant-derived products disclosed herein may be produced in abundance at low cost, and may be used as substitutes for feedstocks originating from fossil fuel or petrochemical sources in the manufacture of various products.

Methods of making glucose and/or furfural from biomass require one or more supercritical fluids that may be used to process biomass, cellulose from the biomass, and/or xylose from the biomass. Examples of supercritical fluids for use in processing biomass include ethanol, water, and carbon dioxide at a temperature and pressure above the critical points for ethanol and carbon dioxide but at a temperature and/or pressure below that of the critical point for water. A supercritical fluid containing carbon dioxide and water may be used to convert cellulose to glucose or convert xylose to furfural. The fluid has a temperature and pressure above the critical point of carbon dioxide, but at least one of the temperature and pressure is below the critical point for water.

The present invention describes a process for at least a 90% conversion of a plant biomass preferably by a reduction of the units of cellulase needed and by using a xylanase which acts synergistically with the cellulase to improve the yield of xylose and glucose as sugars. The process enables greater conversion of a lignocellulosic plant biomass to glucose and xylose for use as animal feeds and as fermentation as medium for producing ethanol.

The present invention provides thermosetting aqueous binder compositions of (i) one or more diprimary diamine, e.g. lysine, or poly(primary amine), e.g. polyethylenimine and tris(2-aminoethyl)amine, and (ii) one or more 5-carbon reducing sugar, such as xylose. The binders are at least substantially formaldehyde free and cure rapidly at temperatures sufficiently low and with sufficiently little swelling to enable one to provide wood or woody material containing articles, such as particle board, oriented strand board and bamboo boards or articles.

The invention relates to a method for preparing xylose by using squeezed waste alkali in the viscose fiber production process. According to the method, xylose finished products are obtained through work procedures of hemicellulose solution preparation, hemicellulose extraction, hemicellulose hydrolysis, neutralization and deacidification, preconcentration, decoloration, ion exchange, ordinary concentration, crystallization, separation and drying. When the technical scheme provided by the invention is adopted, harmful environment-pollution substances such as waste alkali and waste water generated in the viscose production process can be thoroughly eliminated, the standard of full-flow-process clean production can be reached, viscose production enterprises can also produce xylose in the viscose production process, the goal of environment protection is reached, and meanwhile, the waste reutilization is also realized.

The invention relates to a method for producing a wood sugar product and a byproduct of ethanol or D-ribose or citric acid. The method takes hydrolysis liquid, wood sugar mother liquor and/or production waste liquid containing pentose of agricultural or forestry waste as the raw materials, comprising the following steps: (a) preprocessing feed liquid; (b) colour spectrum separation: separating thefeed liquid into arabinose fraction feed liquid and wood sugar fraction feed liquid; (c) removing mixed sugar at least containing glucose and galactolipin; and (d) carrying out aftertreatment on thewood sugar fraction feed liquid to obtain the wood sugar product. The wood sugar product comprises xylitol and D-wood sugar. The invention has low production cost and high efficiency and is suitable for large-scale industrial production.

This invention provides methods for producing ethylene glycol from polyhydroxy compounds such as cellulose, starch, hemicellulose, glucose, sucrose, fructose, fructan, xylose and soluble xylooligosaccharides. The methods uses polyhydroxy compounds as the reactant, a composite catalyst having active components comprising one or more transition metals of Groups 8, 9, or 10, including iron, cobalt, nickel, ruthenium, rhodium, palladium, iridium, and platinum, as well as tungsten oxide, tungsten sulfide, tungsten hydroxide, tungsten chloride, tungsten bronze oxide, tungsten acid, tungstate, metatungstate acid, metatungstate, paratungstate acid, paratungstate, peroxotungstic acid, pertungstate, heteropoly acid containing tungsten. Reacting at a temperature of 120-300° C. and a hydrogen pressure of 1-13 MPa under hydrothermal conditions to accomplish one-step catalytic conversion. It realizes efficient, highly selective, high yield preparation of ethylene glycol and propylene glycol from polyhydroxy compounds. The advantage of processes disclosed in this invention include renewable raw material and high atom economy. At the same time, compared with other technologies that converts biomass raw materials into polyols, methods disclosed herein enjoy advantages including simple reaction process, high yield of targeted products, as well as easy preparation and low cost for the catalysts.

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.

The invention belongs to the biochemical industry field and particularly relates to a novel process for producing the polyatomic sugar alcohol and the lignin by comprehensively using agricultural and forestry wasters of corncobs. The process includes preprocessing raw materials by using a chemical or biological method, and producing a xylose hydrolysate in a high-temperature digesting or steam blasting mode to produce xylose products or xylitol products through a biological method. According to the process for producing the polyatomic sugar alcohol and the lignin by comprehensively using agricultural and forestry wasters of corncobs, ingredients of cellulose and lignin contained in the raw materials are fully used to develop and produce corresponding products.

Improved fermentation activity of microorganisms in a polysaccharide gel such as an alginate gel is obtained after dehydration, staorage and rehydration by soaking the gel containing the microorganisms prior to dehydration in a sugar solution to provide in the gel an amount of sugar of at least 100 g/kg and less than 500 g/kg of gel, preferably less than 300 g/k of gel. The dehydration may be carried out in a fluidized bed or by lyophilization. The gel may be in the form of beads or fibers having a double layer structure formed by an internal layer or core of gel containing the microorganisms and an external lay er or envelope of gel essentially devoid of the microoraganisms. The sugar is preferably xylose, glucose, fructose, lactose or sucrose, and the sugar solution may contain a polyol such as sorbitol, inositol or glycerol to provide in the gel an amount of polyol of at least 30 g/kg of gel. The sugar solution may also contain a non-ionic surfactant such as sorbitan monostearate as a protecting substance to fur ther improve fermentation activity. The microorganisms in the gel are preferably yeast, and after rehydration the yeast containing gel is used in producing a fermented drink such as in secondary fermentaion of wine to produce sparkling wine or champagne.

The ecological nutritive compound feed for meat chicken consists of corn, soybean dregs, corn protein powder, lysine, methionine, soybean oil, salt, sodium bicarbonate, stone powder, calcium biphosphate and other materials. It has the functions of promoting growth of meat chicken, raising immunity and raising disease resistance. The feed contains no antibiotic and has no drug residue.

The invention discloses a method for utilizing straw biomass by grades, comprising the following steps: carrying out steam explosion to straw biomass; extracting and separating water soluble constituents and water insoluble constituents in steam exploded straw by water, wherein the water soluble constituents are purified and concentrated to obtain active low polyxylose and xylose and the water insoluble constituents are used for further fermentation to generate ethanol; and extracting lignin from the fermentation residue. The invention realizes the maximization of utilization of biomass and overcomes the disadvantages of high production cost, low efficiency and environmental pollution and the like in the prior art.

A method for using biomass to produce cellulose, lignin and wood sugar comprises that breaking and screening the biomass, using low-boiling-point organic acid to immerge to decompose the biomass into wood sugar and oligosaccharide, and fluidize the cellulose and lignin, cools the liquid biomass after reaction, adds organic solvent, mixes uniformly and lays, after deposits completely, separating deposits and washes, dries to obtain non-shaped cellulose, distills the mother liquid of cellulose, recycles organic acid and generated volatile organics, distills mother liquid, cools and lays until complete deposition, separates deposits, washes, and dries to obtain wood sugar and oligosaccharide, evaporates to recycle the wood sugar and the organic solvent of deposited mother liquid, then separates the deposits, and dries to obtain lignin. The invention can completely circulate organic acid and organic solvent without waste discharged.

The invention relates to a method for reclaiming and condensing sugar and removing toxicity inhibitors in lignocellulose prehydrolysis liquid by the applied nanofiltration technology. The method is realized by the following scheme: the pH value of the lignocellulose prehydrolysis liquid is firstly adjusted to 2.0-5.0, and the filtration pretreatment is carried out to remove suspended impurities; and then a filtration membrane is used for condensing sugar and remove inhibitors, the sugar of glucose, xylose and the like is trapped by the nanofiltration membrane, the weakly acidic inhibitors (formic acid, acetic acid, levulinic acid and the like) and the furfural inhibitors (furfural, 5-hydroxymethyl furfural and the like) continually penetrate through the nanofiltration membrane, the various inhibitors in the prehydrolysis liquid are removed, and the sugar in the prehydrolysis liquid is condensed to realize the purification, reclaiming and condensation of the sugar in the prehydrolysis liquid, so that the fermentability of the sugar is improved. The invention has the advantages of simple and safe operation, high efficiency and energy saving, and facilitates the continuous production; the nanofiltration has effects of purification, reclaiming and condensation; and the method can realize the industrial production.

The invention relates to a method for producing a chicken flavor essence base material by using a chicken framework, which comprises the following steps: firstly, crushing the cleaned chicken framework by a bone crusher, grinding the crushed chicken framework into chicken bone cement of which diameter is 10 +/- 5mu m by a colloid grinder, directly delivering the chicken bone cement into a reaction kettle without high-temperature boiling, adding water into the chicken bone cement to make the solid content reach 8 percent, and adjusting the pH to 7.0 by using 10 percent NaOH solution; adding 0.5 to 1.5 percent of composite proteinase by mass of the chicken bone cement into the mixture, and carrying out enzymolysis for 3 to 5 hours at a temperature of 55 DEG C; adding a thermal reaction mixture into the reaction kettle; heating the reaction kettle to make the mixture react at a temperature of between 100 and 125 DEG C; and after reacting for 30 to 180 minutes, obtaining the essence base material with intense chicken flavor, wherein the thermal reaction mixture comprises: 5 to 15 percent of glucose, 5 to 10 percent of xylose, 1 to 3 percent of cysteine hydrochloride, 1 to 3 percent of glycin, 30 to 50 percent of enzymolysis liquid, 1 to 5 percent of chicken fat, 5 to 20 percent of yeast powder, and 0.5 to 1.5 percent of vitamin B1.

The invention provides a preparation technology of xylose, which mainly comprises the following technical steps: hydrolyzation, ultrafiltration purification, primary decoloring, electrodialytic deacidification and desalination, membrane concentration, primary evaporation and concentration, secondary decoloring, ion exchange refined desalting, secondary evaporation and concentration, crystallization, centrifugation, and drying to obtain a finished product xylose crystal. The technology has the advantages that the membrane technology is used to remove macromolecule impurities of colloid, protein, and the like in xylose hydrolysate, electrodialytic deacidification and desalination technology is used to lower the electric conductivity of an xylose solution, and meanwhile, neutralization and positive-negative-positive resin combined one-step purification process is removed to simplify the technical process; therefore, the manufacturing cost of xylose is lowered, meanwhile, the waste water discharge load of the manufacturing of xylose can be allowed to be lowered by more than 40%, and well environmental benefits and economic benefits are achieved.

Disclosed is a clostridium beijerinckii capable of producing butanol with high yield. The classification and nomenclature of the clostridium beijerinckii is Clostridium beijerinckii Y-3, with an accession number of CGMCC 5805. The method for preparing biological butanol through fermentation of xylose residue serving as raw material in the invention comprises the steps of performing calcium hydroxide detoxification pretreatment, carrying out anaerobic hydrolysis, preparing C. beijerinckii Y-3 anaerobic fermentation medium and adopting fermentation to produce biological butanol. According to the invention, the high-yielding butanol bacterial strain screened by using ethyl methyl sulfonate (EMS) mutation, starch plate and 2-deoxy-D-glucose plate is capable of producing butanol by using xylose residue treated by calcium hydroxide detoxification process as raw material and through fermentation. In this way, the problems of inadequate strain ability and raw material shortage during the process of producing butanol through traditional biological fermentation are solved and the transformation from industrial waste to high value-added biological energy is realized. The method is an environment-friendly method for preparing biological butanol and has a wide prospect of industrial application.

Corn cobs are important biomass resources. For a long time, the corn cobs have low chemical utilization ratio or cannot be utilized sufficiently to cause a great waste of resources. The invention develops a method for preparing ethylene glycol, propylene glycol and glycerine by carrying out catalytic hydrocracking conversion on the corn cobs, wherein the product is an important polyester synthetic chemical raw material. The corn cobs are efficiently converted into low carbon polyol products by the processes of acid-catalyzed hydrolysis, catalytic hydrogenation conversion and cracking. The yield of xylose in the hydrolytic process reaches over 30 percent; the conversion rate in the hydrogenation process reaches over 90 percent; and the selectivity in the hydrogenation process reaches over 90 percent.

The invention discloses a method for preparing furfural by xylose dehydration through fixed bed catalysis, which comprises the following steps: adding a 1-3 mol/L acid catalyst solution into a reaction vessel, adding a cocatalyst of NaCl till saturation is achieved, heating to backflow, stirring to form a rotating liquid level of a catalyst layer with a fixed volume and concentration, jetting 10-20 wt% of xylose solutions obtained by straw hydrolyzation through dilute acid catalysis into the reaction vessel with a certain speed, performing xylose dehydration, and performing rectification to obtain a furfural solution with a purity of up to above 99% and a furfural yield of 50-70 wt%. The advancement of the invention is that the heating temperature is adjustable, which allows the volume of the xylose solution jetted into the reaction vessel to be maintained to be equal to the volume of the distilled furfural solution; the concentrations of the acid catalyst and the cocatalyst are constant; the volume of the catalyst layer is constant; the reaction process is maintained to be stable; continuous production is realized; the water phase of furfural-water separation returns to the hemicellulose hydrolyzation procedure for recycle; no waste water is discharged; the furfural yield is increased twice when compared with the yield of traditional production processes.

The invention discloses a preparation method for fast separating flavonoid glycosides from oil-tea-cakes with a medium pressure column, which comprises the following steps of: decorticating and crushing camellia oleifera abel seeds, degreasing the camellia oleifera abel seeds with non-polar solvents, performing extraction with ethanol water, filtering and condensing the extract to obtain crude extract concrete, performing fast separation with the medium pressure column to obtain an over 90 percent flavonoid glycoside mixture, and further adopting a high performance liquid chromatography to prepare over 95 percent flavonoid glycoside monomers, wherein the flavonoid glycoside monomers are kaemplerol 3-O-[2-O-beta-D-galactose-6-O-alpha-L-rhamnose]-beta-D-glucoside (I) and kaemplerol 3-O-[2-O-beta-D-xylose-6-O-alpha-L-rhamnose]-beta-D-glucoside (II) respectively. The method can be used for batch preparation, and has the advantage of providing quality raw materials for the development of flavonoid glycoside medicaments and healthcare functional products in the oil-tea-cakes.

The invention provides a method for producing xylose co-produced with acetone, butanol and ethanol by utilizing straws. The straws are hydrated by acid to be filtered to be divided into xylose hydrolysis fluid and xylose residue; the xylose residue is zymohydrolyzed, fermented and rectified to prepare the acetone, the butanol and the ethanol; the xylose hydrolysis fluid is used for preparing the xylose. The method of producing xylose co-produced with acetone, butanol and ethanol by utilizing straws of the invention realizes the maximization of the cellulose straw substances, not only the straw resources are fully utilized to realize changing waste into valuable and the added value of products is improved to realize the economic value of the straws, but also the new raw material source and methods for the production of the acetone and the ethanol are developed and more economic benefits and social benefits are brought to the enterprises and the society.

The ecological nutritive compound feed for sucking pig consists of corn, puffed corn, puffed soybean, plasma protein powder, soybean milk powder, whey powder, fish meal, calcium biphosphate, lysine, threonine and other materials. It has the functions of promoting growth of sucking pig, raising immunity and raising disease resistance. The feed contains no antibiotic and has no drug residue.

The invention discloses a blueberry composite tablet candy capable of relieving visual fatigue and a preparation method thereof. The blueberry composite tablet candy capable of relieving the visual fatigue comprises the following raw materials in percentage by weight: 13.25 percent of a blueberry extract, 0.5 percent of lutein esters, 0.3 percent of beta-carotene, 1.0 percent of citric acid, 64.45 percent of sorbitol, 2 percent of xylooligosaccharide, 3 percent of dextrin and 15 percent of microcrystalline cellulose, wherein the blueberry extract is extracted from a mixture of blackberry pomace dry matter and acid ethanol; the acid ethanol comprises ethanol and water with the volume percentage of 60 percent; the pH value of the acid ethanol is 1.5 to 3.0; the blackberry pomace dry matter and the acid ethanol are in the mass volume ratio of 1:50-1:70; the preparation method of the blueberry composite tablet candy capable of relieving the visual fatigue comprises the following main steps: 1, preparing the blueberry extract; 2, crushing; 3, mixing; 4, granulating; 5, tabletting; 6 packaging. The blueberry composite tablet candy capable of relieving the visual fatigue can effectively relieve the visual fatigue, can improve eyesight after long-term eating, and is convenient to take; a new using way is provided for utilizing fresh blueberry and fully playing intentional physiological and pharmacological efficacies.

The invention discloses a new clean method for producing xylitol and arabinose; the method originally utilizes xylose mother liquor as raw material, improves the fermentation process and the separation and purification process by pretreatment of the xylose mother liquor, fermentation, separation of fermented fluid thalli, fermentation pre-treatment, nanofiltration, concentration, chromatographic separation of a simulated moving bed, concentration and crystallization, and the like, shortens the fermentation time, lowers the production cost, greatly reduces the discharge amount of sewage, and increases the conversion rate of xylitol and the yield rate of arabinose; the purity of the xylitol and the arabinose which are obtained by utilizing the method can respectively reach more than 99.9 percent and 99 percent; and the yield rate of xylitol and arabinose is improved greatly, thereby creating an effective clean pollution-free industrial road for the production of xylitol and arabinose.

The invention provides a processing and recovering process of a chemical fiber pulp cellulose alkali pressed liquor. The processing and recovering process mainly comprises the steps of primary film separating, secondary film separating, hemi-cellulose separating-out, ternary film separating, hemi-cellulose recovering, and the like. The invention provides a process for recovering the hemi-cellulose and alkali from the alkali pressed liquor. Compared with the prior art of recovering the alkali by using a nano-filtration system, the process provided by the invention has the advantages that the alkali recovering rate is higher and can reach 95% under the precondition that the concentration of the alkali is unchanged. Meanwhile, the recovering of the hemi-cellulose in the pressed liquor is realized, the obtained hemi-cellulose can be used as xylose producing raw material or directly used as a dispersing agent. In addition, the service life of the films can be prolonged.

The invention discloses an industrial Saccharomyces cerevisiae bacterial strain with XKS1 gene knockout for high efficient production of xylitol, the bacterial strain is named SEB9, and a preservationnumber is CGMCC No.14272; the invention also relates to a construction method of the Saccharomyces cerevisiae bacterial strain, and the method comprises the following steps: a KanMX gene of an initial strain is knocked out in order to construct a KanMX-bacterial strain, and a KanMX-bacterial strain with high xylitol yield is screened; the XKS1 gene of the screened KanMX-bacterial strain is knocked out in order to construct a delta XKS1 bacterial strain, and a delta XKS1 bacterial strain with high xylitol yield is screened. A CRISPR/Cas9 gene editing technology is used, the XKS1 gene can be rapidly and fast knocked out by one-time yeast conversion, in order to block further metabolism from xylosone into D-xylulose 5-phosphate, and obtain the bacterial strain with high-yield of xylitol; compared with the initial strain, the Saccharomyces cerevisiae bacterial strain SEB9 prepared by the construction method has superior performance for producing xylitol by fermentation of xylose, the yield may reach a theoretical value 1.0, yield and production of xylitol are effectively improved, and the strain has good application prospects.

[Object] To provide an FAD-conjugated glucose dehydrogenase having a higher specificity for glucose.

[Means for Resolution] A modified glucose dehydrogenase (GLD) which includes a substitution of at least one amino acid residue selected from the group consisting of amino acid residues at positions 37, 69, 72, 73, 76, 78, 102, 217, 228, 240, 356, 407, 424, 437, 527, and 530 in an amino acid sequence of a wild-type FAD-conjugated glucose dehydrogenase (GLD) represented by SEQ ID NO: 1, and has a decreased ratio of activity for xylose/activity for glucose as compared with the wild-type GLD; a polynucleotide encoding the modified GLD; a recombinant vector containing the polynucleotide; a transformed cell produced by using the recombinant vector; etc.

The invention relates to a method for producing L-arabinose, which can simultaneously produce ethanol, D-ribose and citric acid as byproducts. The method utilizes a hydrolyzate of agricultural waste, a xylose mother liquor and/or a production waste liquor containing pentose as the raw materials and comprises the following steps: (a) pretreating the raw materials; (b) carrying out the chromatographic resolution to separate the raw materials into an arabinose-stage liquor and a xylose-stage liquor; (c) removing impurities and unwanted bacteria, which have an inhibiting effect on fermentation, as well as unwanted saccharides at least comprising glucose and galactose; (d) and carrying out the post treatment on the arabinose-stage liquor to obtain the L-arabinose. Steps (c1) and (c2) are arranged before the chromatographic resolution in step (b) or after step (b). The invention has the advantages of low production cost and high efficiency, and is suitable for large-scale industrial production.

The invention provides a method of applying a low metal loading catalyst for preparing glycol and propylene glycol from carbohydrate, including cellulose, starch, semi-cellulose, cane sugar, glucose, fructose, fructosan, xylose, and soluble xylo oligosaccharide. In the method, carbohydrate is taken as the raw material, the compound catalyst is composed of catalytic active components selected from one or more components from following components: highly-disperse and low-loading ruthenium, inorganic compounds, organic compounds, and complex of tungsten, or simple substance tungsten, then one-step catalytic conversion process is carried out under the hydrothermal conditions: temperature of 60 to 350 DEG C, and hydrogen pressure 0.1 to 15 MPa, and the high-efficient, high-selective and high yield preparation of glycol and propylene glycol from carbohydrate is achieved. The method takes highly-disperse and high stability low loading Ru-based catalyst as the reaction catalyst, so the usage amount of value metals is reduced, the loss of catalyst carrier is slowed down, and the recycle rate of Ru-base catalyst is increased. The catalyst has the prominent advantages of high activity, high selectivity, and very high cyclicity. Compared to other technologies, which prepare polyol from carbohydrate, the method has the advantages of simple reaction process, high efficiency, good stability of catalyst, and multi-circulation, and has very vast industrial application value.

The invention discloses a new oil production microbe culture method, wherein a mixture of cellobiose and xylose is adopted as a main carbon source substance, other necessary nutrients are added, gas introduction is performed to culture oil production microbe, and microbe oil is prepared, wherein the mixture of the cellobiose and the xylose can be prepared through lignocelluloses raw material hydrolysis, the lignocelluloses raw material is subjected to complete hydrolysis to usually obtain a hydrolyzate adopting glucose and xylose as main ingredients, a glucose effect exists when the hydrolyzate is used for microbe culture, and a fermentation period is long. According to the present invention, the glucose effect is avoided, a culture period is shortened, production efficiency and raw material utilization rate are increased, cost is reduced, technical economy of the microbe oil is improved, and the method can be applicable for microbe oil and biodiesel preparation through biomass resource conversion.