68 results about "Sodium Bicarbonate Solution" patented technology

The invention discloses a preparation method of micromolecular active collagen peptide, which comprises the following steps: (1) cutting fresh leather into fragments, pretreating the leather with a sodium bicarbonate solution, rinsing the leather with deionized water, and refrigerating and storing; (2) mixing papain, bromelain, pancreatin, pepsase, alkaline protease, neutral protease and flavourzyme to obtain a compound enzyme preparation; (3) performing high-pressure steam sterilization on the leather at 110-140 kPa and 120-122 DEG C to obtain leather with the hydrolysis degree of 75-85%, then adding distilled water into the leather to obtain mucilage, then adding a compound enzyme preparation into the mucilage, reacting for 5.5-6.5 hours at the pH of 6.8-7.2 and the temperature of 50-55 DEG C, and then performing enzyme inactivation at the temperature of 85-95 DEG C; and (4) after the reaction system is cooled to room temperature, purifying and centrifuging the reaction system, and taking clarified supernate, thereby obtaining the product. Different animal skins are treated, the proportion of peptide fragments with the molecular weight smaller than 1000 Da of the prepared small-molecule active collagen peptide is larger than or equal to 80%, and the hydroxyproline content is larger than 3%.

Provided is a method for producing a solution of atropine with improved recovery. A method for producing a solution of atropine-211, comprising the steps of: irradiating bismuth with alpha rays, generating atropine-211 in the bismuth, and distilling the bismuth irradiated with the alpha rays, separating and purifying atropine-211, and dissolving it in an aqueous sodium bicarbonate solution.

The invention discloses high-activity high-titanium slag micropowder as well as a preparation method and application thereof, and belongs to the technical field of industrial solid waste resource utilization. The preparation method comprises the following steps: compounding alkaline industrial solid waste and an alkali activator into a composite alkaline modifier; grinding a high-titanium slag raw material, mixing the ground high-titanium slag raw material with the modifier, and carrying out high-temperature calcination treatment; carrying out carbonization treatment on the calcined product in a hot and stuffy tank by using a 20-40g / L sodium bicarbonate solution; and finally, carrying out filter pressing, drying and grinding to obtain the product. Through the synergistic effect of high-temperature modification, alkali fusion activation and carbonization treatment, an inert mineral phase in the high-titanium slag is reconstructed into a high-activity mineral phase, free calcium oxide is effectively eliminated, the 28d activity index of the obtained high-titanium slag micro-powder is not lower than 105%, the content of the free calcium oxide is lower than 0.5%, the stability is excellent, and the high-titanium slag micro-powder is suitable for being used as a high-titanium slag micro-powder. The mineral admixture can replace cement in a large proportion, and high-value utilization of the high-titanium slag is achieved.

The application discloses a self-sensing recycled aggregate cement stabilized macadam mixture and a preparation method thereof. The mixture comprises: aggregate, cement, liquid-solid carbonation modification solution and conductive component; wherein, the calcium chloride solution and sodium bicarbonate solution are used to replace mixing water and form calcium carbonate deposition products inside the mixture to regulate the pore structure and interface state of the recycled aggregate cement stabilized macadam mixture; the chopped carbon fiber is located in the mixture matrix after liquid-solid carbonation regulation and forms a conductive path with piezoresistive response characteristics, so that the mixture generates identifiable apparent volume resistivity change in the compression process. The application enables the mixture to maintain the basic road performance of the road base layer, generates identifiable apparent volume resistivity change in the compression process, is beneficial to damage feature point identification and electrical early warning before peak damage, and can be used for functional preparation of the recycled aggregate cement stabilized macadam base layer material.

The invention relates to the technical field of comprehensive utilization of non-ferrous metal smelting waste residues, and discloses a harmless treatment and valuable metal recovery method for arsenic-alkali residues, which comprises the following steps: carrying out selective leaching and antimony separation on the arsenic-alkali residues, and precipitating antimony by using solubility product difference to obtain arsenic-containing alkali filtrate; carrying out gradient carbonization crystallization under oxidation-reduction potential clamping on the filtrate, converting sodium carbonate into sodium bicarbonate crystals under the constraint of specific potential by utilizing the salting-out effect of pentavalent arsenic in a saturated sodium bicarbonate solution, separating out the sodium bicarbonate crystals, and filtering and separating to obtain a sodium bicarbonate product and arsenic-rich mother liquor; according to the method, through a coupling mechanism of potential clamping and gradient carbonization crystallization, the solubility difference of arsenic and alkali is constructed, the salting-out effect is utilized, the arsenic-alkali co-dissolution balance is broken on the premise that exogenous foreign ions are not introduced, and the arsenic-rich mother liquor is subjected to terminal mineralization to generate arsenic-containing mineral precipitates. Efficient separation and recovery of antimony and sodium carbonate and deep solidification of arsenic are realized.

The invention belongs to the technical field of oil well sealing cement, and particularly discloses a material for activating the repairing function of a self-repairing cement base and a preparation method thereof.The material comprises a rupturable hard shell, the rupturable hard shell is filled with a sodium bicarbonate solution, and a dilute sulphuric acid solution is wrapped in paraffin; and the paraffin coated with the dilute sulphuric acid solution is arranged in the rupturable hard shell filled with the sodium bicarbonate solution. Compared with the prior art, carbon dioxide is needed for the self-repairing cement to play a repairing role, and when the outside detects that an extraction drill hole has cracks, the material can provide carbon dioxide through mutual reaction of solutions to enable the self-repairing cement to generate a repairing product to block the cracks.

The invention relates to a process for producing scandium oxide by comprehensively recovering bauxite. According to the method, scandium compounds in the red mud are activated through bubbling treatment, the pH value of a liquid phase is smaller than or equal to 10.5, after multi-stage filtration, insoluble residues are leached through a sodium carbonate-sodium bicarbonate solution, and a scandium-containing sodium carbonate-sodium bicarbonate solution is obtained; after filtering the obtained solution, mixing a scandium-containing alkaline aluminate solution with a scandium-containing sodium carbonate-sodium bicarbonate solution to prepare a scandium-containing hydrolysis concentrate; carrying out two-stage sulfuric acid leaching on the filtered scandium-containing hydrolysis concentrate; the scandium-containing sulfuric acid solutions obtained after two-stage leaching are mixed, alkali is added to adjust the pH to 4.5-5.5, and scandium sulfate without impurity elements is precipitated; then treating with caustic alkali until the pH is not more than 5.6, and carrying out selective precipitation of scandium; treating scandium sulfate with a sulfuric acid solution to obtain basic scandium sulfate; treating the obtained basic scandium sulfate with oxalic acid to convert the basic scandium sulfate into scandium oxalate; filtering the obtained scandium oxalate precipitate; and calcining scandium oxalate to remove carbon and obtain scandium oxide, wherein the content of Sc2O3 in the calcined product is at least 99.0 mass percent.

The invention provides basic cobalt carbonate with high carbonate content and a preparation method thereof, and belongs to the technical field of cobalt compound preparation. The basic cobalt carbonate can be used as a cobalt source or a cobalt compound precursor for a positive electrode material. The method comprises the following steps: introducing carbon dioxide into a sodium carbonate solution in advance to obtain a pre-carbonized sodium carbonate solution; synchronously dropwise adding the pre-carbonized sodium carbonate solution and the cobaltous sulfate solution for reaction under the condition of partial pressure of carbon dioxide, and controlling the pH value of the reaction solution to obtain reaction slurry; aging the reaction slurry under a carbon dioxide pressurization condition, regulating the pH value, and filtering to obtain a wet filter cake; the wet filter cake is sequentially subjected to sodium bicarbonate solution replacement washing and carbon dioxide saturated deionized water washing, then dried, smashed and screened, and a product is obtained; the method disclosed by the invention is beneficial to improving the carbonate introduction degree of basic cobalt carbonate and reducing soluble salt entrainment, and few insoluble residues are generated in acid medium dissolution evaluation.

The invention belongs to the technical field of bioengineering, and particularly relates to myrobalan fruit nano-vesicles, a preparation method and application of the myrobalan fruit nano-vesicles in skin aging resisting products. The preparation method comprises the following steps: firstly, carrying out enzymolysis on a myrobalan fruit raw material by adopting a compound enzyme preparation containing feruloyl esterase, and adding sodium alginate and a calcium chloride solution into enzymatic hydrolysate after enzymolysis to carry out precipitation treatment on nano-vesicles; and finally, treating the precipitate by adopting a sodium carbonate or sodium bicarbonate solution, fully stirring, centrifuging, and collecting the supernatant, thereby obtaining the purified product of the myrobalan fruit nano-vesicle. The preparation method of the myrobalan fruit nano-vesicle is efficient and low in cost, the content of miRNA in the obtained nano-vesicle is high, animal experiments show that the nano-vesicle can reduce the content of IL-6 inflammatory factors in experimental animal skin tissue and reduce collagen loss caused by ultraviolet rays, and the nano-vesicle has remarkable anti-aging and light aging relieving effects and can be used for preparing the nano-vesicle. The method can be applied to functional skin care products.

The present invention involves immersing beef or pork in alkaline water, carbonated water, a sodium bicarbonate solution, or a sodium carbonate solution, and then removing it. This relates to a method for manufacturing a processed grilled meat product in which beef or pork is aged in pear juice and then baked in an oven, and the raw meat By improving pH, swelling degree, water retention, and tenderness during cooking, it has the greatest influence on the palatability of grilled meat products. By providing processed grilled meat products with improved texture, grilled meat products such as galbi and bulgogi are introduced to foreigners Overcoming the limitation that, despite its high popularity, it has not become mainstream because it is difficult for foreigners to cook it themselves outside of Korean restaurants New possibilities for Korean food franchises providing grilled meat products that are complex, fast, and standardized in taste and quality We can contribute to the globalization of Korean food by opening [it].

This invention discloses a purification method for Tirzepatide. The method includes: dissolving crude Tirzepatide peptide in ammonia or sodium bicarbonate solution, filtering, and purifying by reversed-phase chromatography to obtain a purified sample; eluting the purified sample using reversed-phase high-performance liquid chromatography (RP-HPLC) with a sodium or potassium buffer solution as mobile phase A3 and one or a mixture of acetonitrile, methanol, and isopropanol in any proportion as mobile phase B, preparing a sodium or potassium salt fraction; cooling the sodium or potassium salt fraction to -20 to 10°C and maintaining the temperature; then adding an organic solvent to the fraction, controlling the temperature at -20 to 10°C to precipitate the sample; after complete precipitation, solid-liquid separation is performed, the solid is collected, dissolved in water, filtered, and freeze-dried. This invention improves the concentration speed, ensures product purity, and strictly controls impurities.

The application discloses a method for determining water-soluble calcium content in stone powder, and relates to the technical field of material detection. The method comprises the following steps: firstly, mixing a stone powder sample with water to extract a sample solution; then, adding an excess of sodium bicarbonate solution to part of the sample solution, heating at 70-80 DEG C, cooling and standing, and then treating the sample solution by filtration, washing and drying to obtain a precipitate; finally, calculating the water-soluble calcium content in the stone powder according to the mass of the precipitate. The method realizes accurate detection of the water-soluble calcium content through sodium bicarbonate precipitation and constant weight determination. The method can also realize batch detection of samples, improves work efficiency, and is safe and environmentally friendly in the experimental process.

The invention belongs to the technical field of wet metallurgy extraction agents, and particularly relates to an amide extraction agent and a preparation method and application thereof. The preparation method of the amide extracting agent comprises the following steps: (1) putting n-butyl bromide and sec-butylamine into a reactor, reacting in a homogeneous reactor for 6-10 hours, washing with a saturated sodium bicarbonate solution after the reaction is finished, then separating liquid, and carrying out rotary evaporation on an organic phase to obtain N-butyl sec-butylamine; (2) dissolving N-butyl sec-butylamine in an organic solvent, dropwise adding diglycyl chloride into the solvent at-20 to 0 DEG C, reacting at room temperature for 1-5 hours after dropwise adding, filtering to remove precipitate, washing an organic phase with hydrochloric acid and secondary water in sequence, removing water with anhydrous sodium sulfate, performing rotary evaporation on the organic phase, and performing vacuum drying on a product to obtain the N, N '-di-n-butyl-N, N'-diglycyl chloride. The catalyst is N, N '-di-sec-butyl-3-oxoglutaramide.

The invention relates to the field of bronze ware, in particular to a bronze ware distressing method which comprises the following steps: S1, cleaning the surface of a bronze ware, uniformly coating the cleaned surface of the bronze ware with an etchant, and standing to obtain an oxidized bronze ware; s2, the surface of the oxidized bronze ware is washed until eluate is clear, then the whole oxidized bronze ware is soaked in a sodium bicarbonate solution for 24 h, the pH is 7.5-8, and the rusted bronze ware is obtained; s3, the rusted bronze ware is washed and dried, and the antique bronze ware is obtained; the corrosion inducing agent is at least one of silver nitrate, copper chloride and aspartic acid. According to the method, the surface of the bronze ware is eroded through the corrosion inducing agent, then the basic carbonate aerugo rust layer is formed on the erosion layer of the bronze ware through sodium bicarbonate induction, and finally the antique bronze ware is obtained through washing and drying, so that the antique effect of the surface of the bronze ware can be achieved within a short time; and uniform distribution of the antique layer on the surface of the bronze ware can be ensured.

This utility model relates to the field of baking soda production and processing technology, and discloses a baking soda alkali material conveying device, including a conveying pipe for conveying alkali, flanges at both ends of the conveying pipe, several mounting holes arrayed near the inside of the flanges, a valve fixedly installed at the end of the conveying pipe through the flanges, a heat insulation component for maintaining the temperature inside the conveying pipe provided on the outside of the conveying pipe, and a heat insulation group for heat preservation provided on the outside of the heat insulation component; by sequentially connecting and installing heat insulation pipes around the outside of the conveying pipe, and connecting multiple heat insulation pipes through an annular shell, a water pump can be started to introduce hot water into the heat insulation pipes, and the hot water will circulate from the annular shell along the return pipe, thereby maintaining the temperature outside of the conveying pipe, minimizing the accumulation of alkali crystals due to cooling as the conveying length progresses and blocking the valve, thus stably maintaining the temperature and preventing alkali crystallization.

The invention discloses a process method for producing zinc oxide by recovering zinc from waste galvanized steel sheets. The process method comprises the following steps: step 01, carrying out corrosion reaction on galvanized steel sheet wastes and acid liquor; 02, reacting the liquid with a hydrogen peroxide solution; step 03, injecting a sodium hydroxide solution into the liquid; step 04, filtering the liquid to obtain a ferric hydroxide flocculate precipitate; and step 05, filtering impurities in selective chelating adsorption resin to obtain a zinc-containing solution. Step 06, adding a sodium hydroxide solution into the zinc-containing solution to obtain a sodium metazincate solution; step 07, filtering the sodium metazincate solution, and introducing carbon dioxide gas into the obtained filtrate to obtain a sodium bicarbonate solution; and step 08, carrying out centrifugal separation on the solution, and calcining the obtained solid to obtain zinc oxide. According to the method, the zinc is effectively extracted by adopting the waste galvanized steel as the raw material, and the economic benefit of treating the waste galvanized steel is improved.

The invention discloses a distributed carbon management integrated system capable of automatically realizing carbon capture, carbon utilization and carbon sequestration in a single system. The distributed carbon management integrated system comprises a direct air capture unit, an electrochemical regeneration unit, a carbon dioxide release and pressurization unit, a water mineral separation and carbon sequestration unit, a circulating liquid transmission system and a control module. Carbon dioxide in the air is firstly adsorbed by the copper-chelated alkalescent resin, and the resin after adsorption saturation is regenerated through alkali liquor generated through electrochemistry and forms a sodium bicarbonate solution. The sodium bicarbonate solution enters a closed container filled with weakly acidic resin to be subjected to acidification reaction, carbon dioxide gas is generated through self-pressurization and conveyed to the water mineral separation and carbon sequestration unit under pressure driving, and calcium carbonate precipitates generated in the water are subjected to solid-state sequestration. According to the invention, integration of carbon capture, regeneration, conversion and sequestration and low-energy-consumption operation are realized, and the system is suitable for distributed carbon management application scenarios.

This invention relates to a polypropylene composition, its preparation method, and its application. The polypropylene composition comprises: 54-92 parts of polypropylene resin, 0.01-31 parts of filler, 0.01-16 parts of elastomer, and 0.4-2.3 parts of sodium bicarbonate. The sodium bicarbonate is added in the form of a sodium bicarbonate solution, wherein the mass concentration of sodium bicarbonate in the solution is 2-15%. This invention utilizes the characteristic of sodium bicarbonate to release carbon dioxide upon thermal decomposition, introducing carbon dioxide into the material. It combines the extremely high saturated vapor pressure and excellent solubility of carbon dioxide with stripping and volatilization technology to efficiently remove volatile odor substances from the product, reducing the product's odor level. Simultaneously, it can also reduce the product's gloss, meeting the application requirements in automotive interiors.

The application discloses a synthesis method of a trimellitic anhydride binary phenol ester or a trimellitic anhydride binary alcohol ester in the field of organic synthesis chemical industry, and comprises the following steps: firstly, stirring binary phenol / alcohol and anhydrous solvent to be fully dissolved, then adding N-alkyl imidazole chloride as a catalyst to obtain solution A1; secondly, stirring chlorinated trimellitic anhydride and anhydrous solvent to be fully dissolved to obtain solution A2; then, slowly adding solution A1 into solution A2 under the conditions of 0-5 DEG C and N2 protection, and preparing reaction liquid A3 through a catalytic esterification reaction; and finally, centrifuging reaction liquid A3, stirring the solid into saturated sodium bicarbonate solution to be neutral, reducing pressure and filtering, and drying the filter cake to obtain high-purity trimellitic anhydride hydroquinone ester. The method has the effect of efficiently catalyzing the esterification of chlorinated trimellitic anhydride and binary phenol / alcohol, the residual solvent in the target product can be easily removed, the next step of polymerization is not affected, the production cost is low, and the method has better economy.

The invention belongs to the technical field of medicine, and particularly discloses a preparation method and application of anacycline alkali C and D. The preparation method comprises the following steps: extracting anacycline root medicinal materials by using a mixed solution of acetone and methanol, dissolving by using a hydrochloric acid solution, extracting by using ethyl acetate, adding a saturated sodium bicarbonate solution into an ice-water bath to adjust the pH value, filtering, washing, and drying to obtain the anacycline alkali C and the anacycline alkali D. The preparation method comprises the following steps: extracting the anacycline alkali C and the anacycline alkali D; an alkalized solution is obtained; fully extracting with ethyl acetate and n-butyl alcohol in sequence to obtain crude alkaloid; performing multi-step separation and purification through silica gel column chromatography, MCI gel, Sephadex LH-20 column chromatography, semi-preparative HPLC (High Performance Liquid Chromatography) and the like, and finally performing forward HPLC chiral resolution to obtain a target compound. Activity research shows that the anacycline C and the anacycline D have a remarkable inhibiting effect on mouse writhing reaction caused by acetic acid under the dosage of 5mg / kg, and the analgesic effect of the anacycline C under the dosage of 1mg / kg and 0.2 mg / kg is superior to that of morphine, so that the anacycline C and the anacycline D can be used as novel analgesic lead compounds with development potential.

The invention discloses a small-particle-size basic cobalt carbonate synthesis process in the technical field of inorganic functional materials, and the process is characterized in that firstly, surface-engineered gadolinium-doped cerium oxide nanoparticles are prepared as an inorganic modifier, and the modifier is prepared through the steps of coprecipitation, hydrothermal treatment, surface phosphorylation, reduction heat treatment and the like. In the synthesis of basic cobalt carbonate, the modifier is dispersed in water to form a turbid liquid, then cobaltous sulfate and a sodium bicarbonate solution are added into the turbid liquid in a parallel flow manner at a mild temperature to carry out a precipitation reaction, and nucleation and growth processes are regulated and controlled by accurately controlling the pH value of a reaction system; and finally, adjusting the terminal pH value by using a sodium carbonate solution, aging, separating, washing and drying to obtain a final product. Through the synergistic effect of the unique inorganic modifier and the double precipitants, high-yield preparation of the basic cobalt carbonate with small particle size, good sphericity degree and high purity under mild conditions is realized, the process is simple, and industrial production is easy to realize.

The invention relates to the technical field of magnesium alloy surface treatment, in particular to strontium salt and calcium salt composite chemical conversion liquid for magnesium alloy, a preparation method and a preparation method of a conversion film. The method comprises the following steps: firstly, preparing a saturated calcium bicarbonate solution and a saturated strontium hydroxide solution; sequentially adding a saturated strontium hydroxide solution and hydrogen peroxide into water to obtain a strontium hydroxide preparation solution; preparing a sodium bicarbonate solution; mixing the saturated calcium bicarbonate solution, the strontium hydroxide preparation solution and the sodium bicarbonate solution to obtain a strontium salt and calcium salt composite chemical conversion solution; and the magnesium alloy part to be treated is placed in the strontium salt and calcium salt composite chemical conversion liquid, and after no bubble emerges, the magnesium alloy part subjected to surface treatment is taken out, washed with water and blow-dried. The method is low in cost, low in energy consumption and environmentally friendly, and the prepared composite conversion film composed of SrCO3, CaCO3, MgCO3, MgO, Al2O3 and other phases is uniform, fine, smooth and flat and has excellent corrosion resistance.

The application relates to the technical field of textiles, in particular to a high-breathability antibacterial lining cloth and a preparation method thereof. The pre-emulsion is obtained by adding ethyl methacrylate, hydroxyethyl acrylate, modified chitosan, modified silver-loaded titanium dioxide, modified lignin and a sodium dodecyl sulfate solution; the acrylic adhesive is obtained by adding a sodium dodecyl sulfate solution, a sodium bicarbonate solution and an ammonium persulfate solution into the pre-emulsion. The high-breathability polyester fabric is immersed in the acrylic adhesive for 1-2 minutes, and then is subjected to rolling, baking and the like, so that the high-breathability antibacterial lining cloth is obtained. The high-breathability antibacterial lining cloth prepared by the application has excellent antibacterial performance and ultraviolet resistance, and therefore has a wide application prospect in the technical field of textiles.

The invention provides a method for separating a double-walled carbon nanotube through protonation and temperature control. The method comprises the following steps: mixing a nanotube material with an original mixed structure, a surfactant and water, and carrying out ultrasonic treatment; the obtained dispersion liquid is centrifuged, supernate is loaded into a gel column at the temperature of 25 DEG C to adsorb semiconductor single-walled carbon nanotubes, and first separation liquid is obtained; filling the first separation liquid into a gel column at the temperature of 40 DEG C to adsorb metal single-walled carbon nanotubes, so as to obtain a second separation liquid; uniformly mixing the second separation liquid and a protonated material, loading the mixture into a gel column at 44 DEG C to adsorb the S-coated S-type double-walled carbon nanotube so as to obtain a third separation liquid, the protonated material being a Nafion alcoholic solution, hydrochloric acid or a sodium bicarbonate solution; enabling the third separation liquid to sequentially pass through gel columns at 48 DEG C, 52 DEG C and 55 DEG C to respectively adsorb M-and-S-type double-walled carbon nanotubes, S-and-M-type double-walled carbon nanotubes and M-and-M-type double-walled carbon nanotubes, so as to realize effective separation of four kinds of double-walled carbon nanotubes with different electron types of inner and outer tubes.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a preparation method of triazolone-14C. Comprising the following steps: synthesizing phenol-14C: preparing a system A: adding water and concentrated sulfuric acid into a single-mouth bottle and stirring; performing liquid separation on aniline hydrochloride-14C and a saturated sodium bicarbonate solution, performing extraction, adding an organic phase into the system A, performing reaction concentration, dropwise adding sodium nitrite, adding methylbenzene, and performing reaction at 100 DEG C; extracting, drying, filtering, concentrating, and passing through a chromatographic column; the preparation method comprises the following steps: synthesizing 4-chlorophenol-14C, namely dropwise adding N-chlorosuccinimide into 4-chlorophenol-14C, p-toluenesulfonic acid and acetonitrile, and reacting completely; extracting, drying, filtering, concentrating, and passing through a chromatographic column; 4-chlorophenol-14C, ethyl acetate, 1, 2, 4-triazole, potassium carbonate and 600 polyethylene glycol are synthesized, 1, 1-dichloropinacolone is dropwise added, and a reaction is conducted at the temperature of 85 DEG C; after the reaction is finished, cooling to room temperature, extracting, drying, filtering, concentrating, and passing through a chromatographic column; the total yield of the three steps is basically maintained between 60% and 85%, the synthetic reaction conditions are simple, and the yield is high.

The application belongs to the technical field of bioengineering, and particularly relates to a Terminalia chebula Retz. fruit nano vesicle, a preparation method thereof and application of the nano vesicle in anti-skin aging products. In the application, a composite enzyme preparation containing ferulic acid esterase is used to perform enzymolysis on Terminalia chebula Retz. fruit raw materials, sodium alginate and a calcium chloride solution are added to the enzymolysis liquid after the enzymolysis, and the nano vesicle is subjected to precipitation treatment; finally, a sodium carbonate or sodium bicarbonate solution is used to treat the precipitate, the mixture is fully stirred, centrifuged, and the supernatant is collected to obtain a purified product of the Terminalia chebula Retz. fruit nano vesicle. The preparation method of the Terminalia chebula Retz. fruit nano vesicle provided by the application is efficient and low in cost, the nano vesicle obtained has a high miRNA content, animal experiments show that the nano vesicle can reduce the content of IL-6 inflammatory factors in the skin tissue of experimental animals, reduce the loss of collagen caused by ultraviolet rays, has significant anti-aging and light-aging alleviating effects, and can be applied to functional skin care products.

The invention relates to the field of solid waste resource utilization, in particular to a method for preparing high-molecular-ratio cryolite from fluorine-containing aluminum waste residues. The method for preparing the high-molecular-ratio cryolite from the fluorine-containing aluminum waste residues comprises the following steps: mixing the fluorine-containing aluminum waste residues, calcium oxide and sodium carbonate to obtain a mixed material; mixing the mixed material with a dissolution reagent, and performing dissolution to obtain a mixed solution; adding a fluorine-containing compound or an aluminum-containing compound into the mixed solution to regulate and control the fluorine-aluminum atomic ratio, and then introducing carbon dioxide for carbonization decomposition to obtain a mixture; aging the mixture to obtain filtrate and high-molecular-ratio cryolite; wherein the dissolution reagent comprises water, a sodium carbonate solution, a sodium bicarbonate solution or a mixed solution of sodium carbonate and sodium bicarbonate. According to the method, fluorine-containing aluminum waste residues, calcium oxide, sodium carbonate and carbon dioxide are systematically combined for the first time, hazardous waste is successfully converted into high-value high-molecular-ratio cryolite, and waste is treated with waste, and resources are recycled.

This invention relates to the field of textile finishing technology and discloses a skin-friendly blended denim fabric and its preparation method, comprising the following steps: mixing blended denim fabric, sodium hydroxide solution, and sodium bicarbonate solution evenly, heat-treating, removing, washing, and drying to obtain pre-treated blended denim fabric; mixing polyacrylate emulsion, polyether-modified silicone oil, skin-friendly modifier, and deionized water, stirring evenly to obtain a skin-friendly finishing agent; immersing the pre-treated blended denim fabric in the skin-friendly finishing agent, treating, removing, and baking to obtain skin-friendly blended denim fabric. Testing and determination show that the skin-friendly blended denim fabric can quickly absorb excess moisture and keep dry, exhibiting high moisture-wicking, antibacterial, and soft properties, demonstrating the high skin-friendly properties of blended denim fabric.

The application discloses a preparation method of thin sheet four-water lanthanum carbonate powder crystal based on microwave / ultrasonic technology, which comprises the following steps: (1) preparation of eight-water lanthanum carbonate, slowly drop sodium bicarbonate solution into lanthanum chloride solution, fully react for 2-5 hours at a reaction temperature of 30 DEG C; then, the final product is washed with water, filtered and dried to prepare eight-water lanthanum carbonate powder; (2) preparation of thin sheet four-water lanthanum carbonate powder crystal, the eight-water lanthanum carbonate powder prepared in the step (1) is placed in a solvent medium at room temperature, different microwave intensities are regulated to carry out rapid dehydration treatment; then, the product is peeled by means of high-frequency ultrasonic vibration, centrifuged and dried to obtain four-water lanthanum carbonate powder crystal product. The four-water lanthanum carbonate is prepared by means of microwave / ultrasonic technology, which can avoid the generation of basic lanthanum carbonate impurities, and the obtained four-water lanthanum carbonate is thin sheet and uniform in dispersion, and the purity is more than 99.5%.

The application belongs to the field of biochemistry, and particularly relates to an adherable hydrogel material and a preparation method and use thereof. The application provides an adherable hydrogel material, wherein silver nanoparticles are prepared by a GA functionalized PLG mineralization reduction method, and then the silver nanoparticles are incorporated into a hydrogel network to obtain the adherable hydrogel material. The adherable hydrogel material provided by the application has excellent adhesion, and can be simply de-adhered after being treated by glutathione or sodium bicarbonate solution. The hydrogel material provided by the application also has antibacterial property, cell compatibility and low hemolysis rate, and can be used as a wound dressing to promote tissue repair.