11results about How to "Simple extraction process" patented technology

The invention belongs to the technical field of algal polysaccharide extraction, and discloses a modification extraction method of algal asparagus polysaccharide and a method for preparing a lutein coating by using the algal asparagus polysaccharide. The modified extraction method comprises the following steps: extracting gracilaria lemaneiformis powder with a weak base solution, enabling lactide and polysaccharide to be subjected to grafting reaction through a redox initiation system under the assistance of ultrasonic waves, and then separating out a first polysaccharide component with high emulsibility and a second polysaccharide component with high gel property through graded alcohol precipitation. The two obtained functional components are used for coating xanthophyll, specifically, the first polysaccharide component emulsifies a xanthophyll oil phase to form a pre-emulsion, the second polysaccharide component is compounded with gelatin, a composite coacervate is formed on an oil drop interface by adjusting the pH value, and finally drying and curing are conducted. According to the method, two modified polysaccharides with definite functions can be synchronously obtained, the prepared xanthophyll coating is high in encapsulation efficiency, good in storage and processing stability and excellent in water dispersibility, and the problems that xanthophyll is unstable and difficult to apply are effectively solved.

The application discloses a method for extracting sodium glycolate from pesticide wastewater and belongs to the wastewater treatment field. After 2,4-D production wastewater is stirred after pH is adjusted to 3.0, the filtrate is collected by filtration, the pH of the filtrate is adjusted to 8.0, and the concentrated solution is obtained by concentration under reduced pressure. The concentrated solution, modified cyclodextrin and modified cellulose are mixed according to the weight ratio of 100:0.8-1.2:0.1-0.3, the first mixing and stirring are performed, the second mixing and stirring are performed after cooling, the third mixing and stirring are performed after cooling again, and the filter cake is collected. After the filter cake and deionized water are mixed and stirred, the filtrate is collected by filtration, and the sodium glycolate is obtained by vacuum drying of the filtrate. The application solves the problem of co-crystallization of sodium glycolate and sodium chloride, and improves the purity and yield of sodium glycolate.

The utility model belongs to non-ferrous metal smelting technical field, concretely relates to a device of improving rhenium element content in white smoke dust. The device includes smelting furnace, smelting waste heat boiler, rhenium adsorption tower, rhenium adsorbent groove, smelting electric dust collector, spray cooling tower, reagent groove, cloth bag arsenic collector and flue gas exhaust main pipe, and the top end of smelting furnace is equipped with smelting furnace straight ascent flue, and the smelting furnace straight ascent flue is connected with the air inlet end of smelting waste heat boiler through membrane type wall, and the air outlet end of smelting waste heat boiler is connected with the air inlet end of rhenium adsorption tower through pipeline, and the air outlet end of rhenium adsorption tower is connected with the air inlet end of smelting electric dust collector through pipeline. The utility model adds rhenium adsorption tower after smelting waste heat boiler, adds spray cooling tower after smelting electric dust collector, and installs atomizing spray gun in rhenium adsorption tower and spray cooling tower, utilizes secondary cooling adsorption effect, thereby improves the recovery efficiency of rhenium.

The application provides a tungsten extractant, a preparation method of the tungsten extractant and a method for extracting and separating tungsten, and belongs to the field of metal extraction and separation in hydrometallurgy. The extractant is composed of a double secondary amine, a double phosphorus oxide and a diluent. The double secondary amine has a unique space structure and alkalinity. The double phosphorus oxide has different chemical structures and properties compared with P204. The synergistic effect of the double secondary amine and the double phosphorus oxide can be used to have high selectivity to tungstate in the extraction process. The tungstate containing molybdenum metal can be directly extracted, so that high-purity tungstate products are obtained by purification and separation. The extractant provided by the application does not need to be pretreated by saponification and the like, and does not need to add acid or alkali. The use of acid and alkali and the like is reduced, the environment is friendly, the requirement for equipment is low, the economy is good, the extraction process is simple and efficient. Different extractant formulations can be selected for different tungsten-molybdenum salt systems, and the extractant is flexible and changeable.

The invention discloses a biosynthesis method of alpha-lipoic acid, an engineering strain and a preparation method of the engineering strain. The construction of the engineering strain comprises the following steps: transforming lipocaprylamide enzyme Lpa of enterococcus faecalis, constructing the lipocaprylamide enzyme Lpa to an arabinose promoter or a Cold temperature-sensitive promoter, and then replacing the lipocaprylamide enzyme Lpa to a LacZ gene and an lpxM gene of escherichia coli through RED recombination; or the genes of LipD, lplA, lipA and lpA which are subjected to gene code modification are expressed in the saccharomyces cerevisiae through a pESC vector. The engineering strain is cultured to biologically synthesize alpha-lipoic acid, so that the fermentation cost is further reduced, cyclic synthesis is realized, and the yield is greatly increased.

The invention relates to the field of coal chemical industry, and discloses a method for preparing hard asphalt by solvent extraction of coal tar. The method comprises the following steps: mixing a first solvent with coal tar, heating and stirring, standing for a period of time, separating a first extract liquor on the upper layer, adding the first solvent into the raffinate again, heating, stirring, standing and circularly extracting to obtain a first raffinate, wherein the first solvent is selected from methanol or ethanol; and mixing a second solvent with the first raffinate, heating, stirring, standing, and separating an upper-layer second extract, the raffinate being the hard asphalt component, and the second solvent being selected from toluene or xylene. According to the method, high-quality hard asphalt is obtained by extracting coal tar step by step through two solvents, the softening point of the high-quality hard asphalt is high, and the content of toluene insoluble substances and quinoline insoluble substances is relatively high; the selected solvent is low in toxicity, low in boiling point and good in extraction effect, the extraction process is simple, the extraction temperature is low, and the solvent can be recycled; the method has the advantages of low energy consumption, less investment, stable quality of the hard asphalt product and less discharge of three wastes.

The application discloses a plant dye dyeing method for improving the sunlight fastness of cashmere / wool fabric, which comprises the following steps: (1) dyeing cashmere / wool fabric by using plant dyes; (2) mordanting the dyed cashmere / wool fabric in a mixed solution of ferrous sulfate and gallnut, taking out after mordanting, and washing clean; (3) soaping the mordanted cashmere / wool fabric, washing clean after soaping, and drying. After the cashmere / wool fabric is dyed by using plant extract, the dyed cashmere / wool fabric is immersed in a mixed solution of ferrous sulfate and gallnut, so that the ferrous sulfate and the gallnut form hydrogen bonds and coordination bonds with cashmere / wool fibers and plant pigments, thereby improving the sunlight fastness of the cashmere / wool fabric.

The invention relates to the technical field of chemical engineering, in particular to an extracting agent and a method for extracting bromine from a bromine-containing solution, the extracting agent comprises an extracting agent and halogen, the extracting agent comprises at least one of phosphate, phosphonate and trialkyl phosphine oxide, and the halogen comprises at least one of bromine and iodine. The screened extracting agent and bromide ions form a [M.S] < + > [Br (Y2) n] <-> compound, M is alkali metal ions, alkaline earth metal ions or hydrogen ions, S is a phosphorus-oxygen compound, Y2 is molecular halogen, n is 1-2, the extraction efficiency of the bromide ions can be remarkably improved, the extraction rate reaches up to 90% or above, and the method is suitable for industrial production. The method is suitable for bromine extraction of low-concentration bromine-containing solutions and high-concentration bromine-containing solutions. In a water phase separated for the first time, a peroxidant and acid are not added, a water source is free of pollution, can be directly discharged without any treatment, is more environment-friendly, is free of peculiar smell in the whole extraction process, is low in energy consumption and is suitable for large-scale industrial popularization and application.

This invention belongs to the technical field of plant extract nanoemulsion preparation. To address the current limited research on flavonoids in jujube seed, particularly regarding the extraction, separation, and purification of total flavonoids from jujube seed, this invention provides a jujube seed total flavonoid nanoemulsion, its preparation method, and applications. The process involves extracting fatty oil from jujube seed, enzymatically hydrolyzing jujube seed powder, fermenting the jujube seed enzymatic hydrolysate, extracting total flavonoids, purifying the total flavonoids, and preparing the nanoemulsion using a self-emulsification method. The resulting jujube seed total flavonoid nanoemulsion exhibits high purity, a simple process, and is environmentally friendly and safe. It shows promising applications in the preparation of drugs to improve insomnia, depression, and anxiety. It provides excellent encapsulation and delivery capabilities, protecting the total flavonoids from hydrolytic enzymes, gastrointestinal pH, and other environmental conditions, promoting drug absorption, and improving drug bioavailability and brain penetration. It easily crosses intestinal intercellular spaces and the epithelial barrier, increasing the cellular uptake rate of jujube seed total flavonoids and enhancing the brain targeting and effectiveness of in vivo drug administration.

This invention relates to a lentinan, its preparation method, and its applications. The monosaccharide composition includes glucose, galactose, mannose, fucose, and glucosamine, with a molar ratio of (85.0~88.0):(5.5~6.5):(3.5~4.1):(1.8~2.2):(1.0~1.2). The preparation method uses a composite packing material composed of AB-8 macroporous resin and acidic alumina. Static adsorption decolorization is performed at an optimal mass ratio of 2:3. The extraction process, combining fractionated hot water extraction with negative pressure concentration, is optimized to achieve highly efficient purification of the lentinan without the use of organic solvents. This results in a polysaccharide retention rate of 22.38%, while effectively preserving its β-triple helix active structure.

The application discloses a kind of extraction method of Yao medicine total saponins of Hexangteng based on response surface method optimization and application thereof, the application utilizes response surface method to optimize the extraction process of total saponins of Hexangteng, obtains a kind of method of Yao medicine total saponins of Hexangteng, the extraction method is as follows: the medicinal material of Hexangteng is pulverized, and Hexangteng powder is obtained, then ethanol is added to ultrasonic extraction, and the extraction process conditions are as follows: extraction temperature is 65-70 DEG C, the volume concentration of ethanol is 70-80%, extraction time is 120-150 min, and the ratio of solid to liquid is 1g:25-30 mL.The extraction method process is stable, simple to operate, good repeatability, feasible, higher extraction efficiency, low cost, high yield of total saponins of Hexangteng.The application also determines the antioxidant activity of the obtained total saponins of Hexangteng, and the results show that total saponins of Hexangteng has certain inhibition and clearance effect on DPPH free radical, and has certain reducing power, which provides a theoretical basis for further development and utilization of Hexangteng.