85results about How to "Increase sugar yield" patented technology

The invention relates to cellulosic hydrolysis, in particular to a method for high-efficiently hydrolyzing celluloses in ionic liquid. In the method, the ionic liquid in which celluloses are dissolved is used as solvent, and water, the equivalent weight of which is more than or equal to 1 mol, is used as reactant, and inorganic acids, the catalytic amount of which is the stoichiometric amount, are used as catalyst, and celluloses are reacted under the conditions of the normal pressure and the temperature of between 70 to 100 DEG C for 2min to 9hr; after the reaction is over, celluloses undergo the cold water quenching reaction and the alkali neutralization reaction, and the cellulose hydrolysate is obtained; total reducing sugar and glucose in the cellulose hydrolysate are taken with quantitative chemical analysis, and results of which show that the highest yield of reducing sugar is 73 percent, and correspondingly the yield of glucose is 53 percent. Compared with the conventional hydrolysis method, the method of the invention has the advantages of unnecessary pretreatment, mild reaction conditions, high hydrolytic activity, quick reaction speed, little acid consumption, low requirement on corrosion resistance of a reactor and easy tracking and controlling of the extent of reaction; the method opens a new road for resolving the lasting problem of the complete utilization of lignocelluloses.

A fractionation process for producing value-added products from a lignocellulosic biomass, comprises: a) mechanically refining the lignocellulosic biomass under mild refining conditions to form a refined biomass pulp with enhanced susceptibility to separation of hemicellulose, cellulose and lignin, and enhanced digestibility of carbohydrates in hydrolysis b) separating hemicellulose and sulfur-free high-quality lignin from cellulose in the refined biomass, and, optionally c) producing various bioproducts from the above said process.

The invention relates to a method for increasing the sugar yield of cellulase enzymolysis through pretreatment by using ion liquid. In the method, natural lignin from different sources is pretreated by using different types of ion liquids to increase the sugar yield of enzymolysis. The method comprises the following steps of: firstly, pretreating natural lignin at certain temperature under fully stirring condition by using an ion liquid; secondly, extracting regenerated cellulose from a mixed liquor and drying; and lastly, adding cellulase which can decompose the regenerated cellulose serving as a substrate into reducing sugar at certain temperature, pH and concentration to generate liquid glucose mainly containing glucose. By adopting the method, the sugar yield of lignin can be remarkably increased, the accessibility and the reaction efficiency of cellulase can be effectively increased, the liquid glucose reaches the fermentation level at the final reaction stage, and the entire technical process is simplified.

The invention relates to a maize straw pretreatment method that is a new method for using supercritical or subcritical fluid technology to pretreat the maize straw. The new method improves the enzymolysis efficiency of cellulose in the maize straw, removes lignin that has inhibiting effect on the further fermentation process while improving the sugar yield of the straw, and provides an effective way for further cleanly and highly efficiently producing products such as fuel ethanol and the like. The method is characterized in that the pretreatment temperature is 50-250 DEG C; the operation pressure is 10-20MPa; the reaction time is 0.1-5h; and the solvent is the mixed solvent of CO2, water and one of or more of methanol, ethanol, butanol, pentanol and the like. The sugar yield of the cellulose in the maize straw is 40-95 percent.

The invention relates to cane juice purifying separating technology of sugar making. It includes the following steps: separating the initial extraction liquid and the secondary at sugar cane juicing stage; adding lime cream or other basic compound into the secondary extraction liquid or their mixture to make the pH value equal to 8.0-13; once or many times clarifying of chemical coagulation, flocculation, and solid-liquid separation; mixing the clarified liquid with the initial extraction liquid to do further clarifying by limebase process, phosphoric acid and sulphitation process.

Provided are methods for the pretreatment of ligno-cellulosic biomass such as softwoods with bisulfite such as ammonium bisulfite without the need for exogenous acid. In one variation, a method of pretreating ligno-cellulosic biomass is provided including the following steps: a) providing ligno-cellulosic biomass; b) contacting the ligno-cellulosic biomass with a solution comprising bisulfite at an amount between 1 and 10% of a dry weight of the ligno-cellulosic biomass to form a slurry; c) heating the slurry to a first temperature of 150-210° C. for a first period of time to form a first mixture; d) cooling the first mixture to a second temperature of 100-200° C. to form a second mixture; and e) maintaining the second mixture at the second temperature for a second period of time to form pretreated ligno-cellulosic biomass; wherein the first temperature is higher than the second temperature.

The invention relates to a comprehensive assessment system for a new sugar cane strain. In the sugar material sugar cane variety comparative test stage, 12 character assessment indexes are classified based on a DTOPSIS method and corresponding weight coefficients for the indexes are established after the test data is acquired. The 12 character indexes of the strain to be tested are divided into positive indexes, neutral indexes and negative indexes; and the weight coefficients for the indexes are established.

The invention discloses a method for hydrolysis of corncob under normal pressure, belonging to the field of functional sugar production technology. The method adopts hydrolysis under normal pressure, the hydrolysis temperature is low and the hydrolysis condition is mild. The method includes the steps of: (1) pickling: breaking the corncob to be size of 1-2cm, putting the broken corncob in a hydrolysis kettle, adding sulfuric acid solution with mass concentration of 0.1-1.0% according to solid-to-liquid proportion of 1:5-1:10, heating to 90-100 DEG C, preserving heat for 20-60min, and discharging the waste liquid; (2) rinsing: adding purified water according to proportion of 1-5:1:10 between the pickled dry corncob and the water, heating to 80-100 DEG C, preserving heat for 20-60min and then discharging the waste liquid; and (3) hydrolysis under normal pressure: adding sulfuric acid solution with mass concentration of 1.0-2.0% according to the proportion of 1:8-1:12 between the pretreated corncob and the sulfuric acid solution, heating to 100 DEG C under normal temperature, maintaining the mixture boiling, preserving heat for 2-6h and then discharging the xylose hydrolysate. Detection finds that the dry substance concentration is 5-9%, the transmittance is 20-40% and the content of the xylose is 50-70%.

The invention provides a method for improving cellulase hydrolysis sugar field. The method comprises the following steps: (1) taking cellulose as a raw material; (2) dissolving the cellulose in a CO2 switch-type ionic compound or a mixed solvent consisting of the CO2 switch-type ionic compound and an organic solvent, thereby obtaining a cellulose-containing solution; (3) adding an anti-solvent into the cellulose solution, regenerating, filtering and separating the dissolved cellulose, thereby obtaining the pretreated cellulose material; and (4) taking a certain amount of regenerated cellulose, adding a buffer solution and cellulase for performing enzymolysis, thereby obtaining the glucose solution. The CO2 switch-type ionic compound or the mixed solvent consisting of the CO2 switch-type ionic compound and the organic solvent serves as a solvent, the cellulose is subjected to dissolving pretreatment, and the method has the advantages that the process is simple, the solvent cost is low, the operation is convenient, the solvent can be recycled, the cellulase hydrolysis speed is high, the sugar yield is high and the like.

The invention provides a preparing method for malt sugar. The preparing method comprises the following steps that barley is added with water to be steeped and then sprouted; the barley is ground when growing two leaves wrapping the core, the ground barley malt is obtained, part of the ground barley malt is mixed with cooked sticky rice and subjected to primary fermentation, and the rest of the barley malt is added after primary fermentation for secondary fermentation; after secondary fermentation is finished, filtering is carried out to obtain juice, the juice is boiled out, and malt sugar is obtained. According to the preparing method, barley and sticky rice are selected for preparation, and two times of fermentation are carried out in the fermentation process when barley malt and sticky rice are mixed. By means of the two-section type fermentation method, the fermentation time is prolonged so that an amylolytic enzyme in the barley malt can fully perform the hydrolysis action, starch in sticky rice can be hydrolyzed into malt sugar as much as possible, and thus the sugar yield can be increased.

A process for cold clarification of juice is described. A sugar cane or beet juice clarification process to clarify raw juice by means of aeration of fresh raw juice, addition of milk or lime, anionic and/or cationic flocculants, particularly together with a carbonating process, addition of phosphoric acid and then passing the juice through activated carbon bed is described. The process eliminates the need to heat the juice at any stage thus making it more cost effective, energy saving and gives better yield in terms of quality and quantity both. The recycling of defecated, carbonated and phosphated filtered juice and carbonated and phosphated mud that reduces the consumption of lime, CO₂ and phosphoric acid up to some extent is described.

The invention discloses a method for obtaining xylose hydrolysate by corncob hydrolysis, comprising the following steps of: (1) dedusting and crushing corncobs into grains having a grain diameter of 3-5 mm; (2) adding the crushed corncob grains into a 1.5-0.5wt% sulphuric acid aqueous solution or hydrochloric acid aqueous solution, and soaking; (3) heating the solid materials after the soaking is finished to 120-150 DEG C, and performing a gaseous-phase hydrolysis reaction; and (4) after the hydrolysis is finished, washing the materials by a washing liquid to obtain the 12-15wt% xylose hydrolysate. According to the invention, gaseous-phase hydrolysis is adopted, the corncobs are dedusted, crushed and mixed with acid, and then filled in a pot to be directly hydrolysed, and then subjected to affination by adding water to obtain the hydrolysate, and the sugar degree Bx of the hydrolysate is 12-15%, thus greatly increasing the sugar productivity of the corncob hydrolysis; the processes of water washing and acid pre-treatment are omitted during the technical process; the production of the hydrolysis working procedure realizes sewage zero-discharge, and the production cost is reduced simultaneously.

The invention relates to an improved sugar manufacturing technique adopting the alkaline sulfite method, and particularly relates to a sugar manufacturing technique for improving the yield and reducing the color value of white sugar. According to the sugar manufacturing technique, the appropriate pH value is controlled at three technique points, and the timing of adding phosphoric acid in the conventional method is changed; the reaction time is increased in the step of the phosphoric acid reaction, so that phosphoric acid can completely react with calcium salt in clear syrup; the color value of clear syrup obtained by adopting the sugar manufacturing technique can be reduced from 2000 IU to 1700-1900 IU, and the yield is improved.

The invention aims to provide a progressive stoving neutralization reaction device, comprising a box body, an exhaust port, a tube diffuser, a stove tail tube, a lime milk adding tube, an ash adding actuator, more than one separator and a pH control device, wherein the box body is internally divided into more than two reaction layers by the separator in the horizontal direction; and the pH control device is used for detecting the pH of mixed sugarcane juice in the box body and controlling the dosage of the lime milk according to pH information, thus keeping the pH value of the mixed sugarcane juice stable. The invention also provides a stoving neutralization reaction method, wherein pH detection and control are performed on the sugarcane juice in reaction through the pH control device, so that the pH of the sugarcane juice after reaction is kept in a predetermined range. The progressive stoving neutralization reaction device and method provided by the invention have the characteristics that the pH of the sugarcane juice is regulated and controlled in sections and the reaction efficiency of the neutralization reaction is enhanced through a stirring device, so that the pH of the sugar juice is stabilized, the cleaning efficiency is improved and the reaction time is prolonged; and therefore, the device and the method play an important role in improving the product quality and the sugar yield of a sugar refinery.

Disclosed is a method of separating carbohydrate, including: mixing formic acid with heteropoly acid, chloride or bromide of lithium, magnesium, calcium, zinc, or iron, or combinations thereof to form a mixing liquid, dissolving a cellulose biomass by the mixing liquid to form a solution, mixing water and the solution to hydrolyze the cellulose biomass for forming a carbohydrate solution, and mixing an extractant and the carbohydrate solution to extract the formic acid out of the carbohydrate solution. The heteropoly acid, the chloride or bromide of lithium, magnesium, calcium, zinc, or iron, or combinations thereof in the carbohydrate solution is separated out of the carbohydrate solution by ion exclusion chromatography separation to obtain a carbohydrate. The method for separating the carbohydrate has the advantages of low temperature, the high speed, the high carbohydrate yield and the like, and does not need to use a reactor made of a material resistant to strong acid corrosion.

The invention discloses a xylitol extraction process. The process comprises the following steps: A. pretreatment: carrying out coarse crushing on fresh corn straws by a coarse crusher to obtain particles; B. hydrolysis: adding the corn straw particles subjected to coarse crushing into a hydrolyzer, and carrying out hydrolysis to obtain a liquid which is a sugar solution; C. decolorization: removing impurities from the sugar solution with powdery activated carbon; D. purification: removing anions and cations from the sugar solution by using an anion exchange resin and a cation exchange resin; E. hydrogenation: adding the xylose solution into a reaction kettle, and converting the xylose solution into a xylitol solution; F. crystallization: enabling the hypersaturated-state xylitol crystal to grow, form and precipitate by controlling the cooling rate; G. centrifugation: separating the xylitol from the mother solution by controlling the centrifugating speed of the centrifuge; and H. evaporating water in the xylitol by controlling the temperature of the drying machine and the ambient humidity, thereby obtaining the xylitol product. The xylitol extraction process has the advantages of high yield and low water consumption.