35results about How to "Achieve high-value conversion" patented technology

The invention discloses a method for efficiently extracting mulberry branch bark pectin. The method comprises the following steps of: (1) treating mulberry branch bark by using a greenhouse ionic liquid to separate pectin in the branch bark from cellulose and the like; (2) after treating with the greenhouse ionic liquid, adding water for dissolving the pectin in the mulberry branch bark pectin into water, and precipitating components such as cellulose, hemicellulose, lignin and the like out; (3) taking an upper layer liquid, adding cellulose for treating, and removing cellulose impurities; and (4) decolorizing a supernatant, adding ethanol for precipitating the pectin out, washing with absolute ethanol, drying, and grinding into powder to obtain mulberry branch bark pectin. In the method, the ionic liquid is taken as a treating agent for extracting mulberry branch bark pectin, so that pectin can be extracted effectively, ionic liquid treatment is only required to be performed for 20-50 minutes, the final yield of pectin can be up to about 11 percent, and the pectin extracting efficiency of the mulberry branch bark is increased.

The invention belongs to the technical field of biomass resource utilization and electrode material preparation, and relates to a method for preparing a carbon-based transition metal sulfide composite electrode material based on pyrolysis bio-oil. First, dissolving nickel sulfate or cobalt sulfate into an alcohol / water solution to prepare a bio-oil absorbing solution; then using the absorbing solution to capture the bio-oil produced by biomass pyrolysis, drying the absorbing solution after the pyrolysis reaction, and then passing After being calcined in a reducing atmosphere and cooled to room temperature, the composite electrode material can be prepared. The invention uses bio-oil produced by biomass pyrolysis as raw material, and the prepared composite electrode material has excellent supercapacitor performance: under the current density of 1 A / g, the specific capacitance of the composite electrode material is as high as 1000 F / g above. In addition, the biomass raw material of the invention is cheap, green and sustainable, and the preparation process is simple, which provides a new approach and idea for the high-value conversion of biomass resources and the preparation of carbon-based transition metal sulfide composite electrode materials.

The invention discloses mulberry and bamboo composite fibers obtained after graft modification of mulberry fibers and bamboo fibers in ionic liquid and a preparation method thereof. The preparation method includes the following steps that firstly, the mulberry fibers and the bamboo fibers are subjected to ultrasonic wave aided NaOH treatment and then dissolved in the ionic liquid for a constant temperature reaction, a mulberry fiber solution and a bamboo fiber solution are obtained, and finally the mulberry and bamboo composite fibers are prepared in the ionic liquid and are obtained. According to the preparation method, the ionic liquid is adopted as a solvent, mulberry twig and bamboo twig waste is converted into the high-value high-quality mulberry and bamboo composite fibers, and the method is environmentally friendly, simple, convenient to operate and high in preparation efficiency.

The invention discloses a method for preparing simulated cellulase. The method comprises the following steps: taking a cellulose material, washing, removing the impurities, drying, grinding, and screening, thereby obtaining cellulose powder; uniformly mixing and stirring the obtained cellulose powder with ionic liquid according to a mass ratio of 1-20:100, preserving the temperature, performing assisted microwave treatment so as to expand the fibers, washing to remove the ionic liquid, and drying to remove the moisture, thereby obtaining a primary sample; adding the obtained primary sample into a crucible, putting the crucible into a tube furnace, and performing heating treatment under gas protection; adding a mixed acid, adding water and washing to remove the impurities, and drying to obtain dried powder, thereby obtaining the sample powder; adding the obtained sample powder into an organic base, stirring, heating, reacting, and washing by using a cleaning solvent, thereby obtaining the simulated cellulase. The simulated cellulase prepared by the method is high in binding ability with a substrate (a cellulose material) and good in thermal stability, high-temperature catalysis can be performed, the catalytic effect is good, the cost of the raw materials is low, and the cellulase can be repeatedly utilized.

The invention discloses a selenium and nitrogen co-doped biochar catalytic material as well as a preparation method and application thereof. The present invention utilizes the biological detoxification effect of bacteria (Bacillus megaterium B-10, preservation number CGMCC No.15753) to reduce highly toxic selenite to low-toxic biological nano-selenium, and then uses selenium-enriched bacteria as the carbon of biochar A new type of selenium and nitrogen co-doped biochar catalytic material was prepared by a simple one-step carbonization method by adding a nitrogen source. The preparation method of the selenium and nitrogen co-doped biochar proposed by the invention is simple, convenient, safe, cheap and easy to control, and can be produced on a large scale. At the same time, the reduction of high-valent selenium by bacteria can quickly detoxify selenite pollutants, which has the advantage of being environmentally friendly. In addition, the biochar can effectively degrade refractory organics or pollutants by activating monopersulfate, and the removal effect is good. The reaction speed is fast, and the application prospect in the field of wastewater restoration is very broad.

The invention discloses a synthesis method of imidazolinone derivatives. Using amidine compounds and polyols as raw materials, it catalyzes the high-value conversion of polyols into a series of imidazolinone derivatives through cobalt catalysts, and develops a novel, green, and sustainable chemical synthesis route. The high-value conversion of renewable resources is realized, thus meeting the demand for the synthesis of imidazolinone derivatives. This synthetic method has the advantages of wide substrate applicability, good functional group compatibility, and the use of reusable and cheap metal catalysts and air as the oxidant, and has the potential to prepare imidazolinone derivatives on a large scale in one step, and is also an important resource for biomass resources. Conversion into high-value functional molecules provides an important pathway.

The invention relates to a method for preparing stable isotope-labeled glucose, which comprises the following steps: pretreatment of raw materials: 13 C-labeled Chlorella pyrenoidosa as isotopic raw material, using organic solvents for 13 C-labeled Chlorella pyrenoidosa is subjected to decolorization treatment, and the decolorization bacterium cell crushing treatment; starch liquefaction and saccharification reaction: after the pretreatment 13 C-labeled Chlorella pyrenoidosa undergoes a liquefaction reaction with a liquefaction enzyme, and then undergoes a saccharification reaction with a glucoamylase, separates the reaction liquid from solid to liquid, and collects the supernatant; 13 Separation of C-labeled glucose: The supernatant is subjected to resin decolorization treatment to obtain an eluate, which is concentrated, activated carbon decolorized and crystallized to obtain the 13 C labeled glucose. Compared with the prior art, the present invention has 13 The C-labeled glucose product has the advantages of high abundance and purity, mild process conditions, little impact on the environment, and high utilization rate of chlorella.

The invention discloses a method for preparing biodiesel by directly using cellulose through mixed fermentation. The mixed fermentation is performed by using a plant fiber degrading strain and a grease producing strain, and ethanol is produced by directly using natural plant fiber such as straws. The method comprises the following steps of: designing a culture medium for the mixed fermentation by optimization methods such as a response surface method, and optimizing to obtain the fermentation conditions such as the optimum temperature of mixed fermentation, optimum mixing proportion of strains and optimum mixing time of the strains by utilizing the methods such as orthogonal test and response surface methodology; according to the optimized fermentation conditions, by using the plant fiber as a carbon source, degrading the cellulose into fermentable sugar by using a cellulase producing strain, and adding grease-producing microorganisms into the culture system for the mixed fermentation; and by using the sugar which is produced by the constant enzymolysis of the plant fiber as the carbon source, fermenting to produce grease by using the grease producing strain, and performing methyl esterification reaction of the microbial grease to obtain the biodiesel.

The invention discloses a preparation method of a mulberry twig-based solid acid. The preparation method comprises the steps: firstly washing cleanly impurities and mud on mulberry twigs, peeling, drying, smashing, and thus obtaining a mulberry twig powder; then mixing the obtained mulberry twig powder with N-methyl morpholine oxide according to a ratio of 1:8-10, stirring at the temperature of 80-100 DEG C with the stirring time of 0.5-3 h, and assisting with ultrasonic treatment to make fibers swelled, then washing to remove N-methyl morpholine oxide, adding an auxiliary agent according to a ratio of the mulberry twig powder to the auxiliary agent of 20:1 to make the mulberry twig powder activated, and drying to remove water; then putting the obtained product into a crucible, placing in a tube furnace, adjusting the furnace temperature to 400-500 DEG C, and carrying out heating treatment with nitrogen protection and the treatment time of 1-5 h; and finally, adding fuming sulfuric acid according to a ratio of the mulberry twig powder to a 20% fuming sulfuric acid of 1:1-5, treating, washing to remove impurities, and drying to obtain the mulberry twig-based solid acid. The solid acid has the advantages of small particles, good adsorption property on reaction substrates, good catalytic effect, high thermal stability, high acid value, and low cost, and the raw materials are waste materials.

The invention discloses a preparation method of mulberry active peptide, which comprises the following steps: after washing, drying and crushing mulberry leaves and mulberry bark, adding a treatment agent composed of magnetic graphene oxide, dilute acid and hydrogen peroxide to extract, and using Magnet recovers magnetic graphene oxide, adjusts the pH value to 4.5-5.5, centrifuges to obtain the precipitate, dissolves the precipitate with water and filters, the filtrate contains mulberry protein solution, heats it, cools and adjusts the pH value to 7-8.5, adds protease to keep warm, and puts Ultrasonic-assisted enzymolysis in an ultrasonic field, high-temperature heating to inactivate the enzyme, centrifugation, collecting the supernatant, decolorization, suction filtration, ultrafiltration, dialysis, ion exchange and concentration to obtain the mulberry active peptide. The present invention adopts mulberry leaf and mulberry bark as raw material to prepare active peptide, and the raw material is agricultural waste with low cost, which is of great significance for environmental protection and resource utilization of waste; the method extracts mulberry protein content and conversion efficiency of mulberry active peptide Both are more than the conventional method, and the physical and chemical properties are stable.

The invention discloses a preparation method of a mulberry twig bark fiber / silk fibroin multilayer composite membrane. The preparation method includes the steps of: 1) initial separation of mulberry twig bark fibers; 2) identification of content and purity of the mulberry twig bark fibers; 3) modification of the mulberry twig bark fibers; 4) grafting of the mulberry twig bark fibers; 5) productionof single-layer membranes; and 6) production of the multilayer membrane. The multilayer composite membrane not only solves a problem of single physical mixing during preparation of composite membranes in the prior art, has good water absorption and moisture retention effect, has good thermostability, is reduced in crystallization degree, and is improved in mechanical properties.

The invention discloses a preparation method of a mulberry fiber composite three-dimensional oil-water separation membrane, which belongs to the technical field of membranes and includes the following preparation steps: (1) preparing mulberry fiber; Enzyme partial treatment, ionic liquid mixed solution treatment; (3) Preparation of monolayer film: adding cross-linking reagent, hydrophobic reagent and initiator, drying and molding to obtain a formed hydrophobic and lipophilic monolayer film; (4) Three-dimensional multilayer film Preparation: According to application needs, the single-layer film is prepared into a multi-layer three-dimensional composite film by using an ionic liquid composite cross-linking agent. The beneficial effects of the invention are: providing a new way for the resource utilization of biomass waste. It has many advantages such as high efficiency and environmental friendliness, improves the spatial dimension and contact area of ​​the membrane, and solves the problem of poor mechanical properties during the use of the membrane.