475 results about "Saturated aqueous solution" patented technology

The present invention relates to a process for producing a spherical particle comprising an aggregate of particles containing at least 95% of a water-soluble single substance having a viscosity of 10 mPa.s or less as determined in the form of a saturated aqueous solution, the process comprising: preparing moist spherical particles of the single substance by charging, as cores, crystalline particles or granulated particles of the single substance on a rotary disc in a processing vessel of a centrifugal tumbling granulating apparatus, wherein the granulated particles are prepared by granulating a powder of the single substance, and dispersing over the cores a powder of the single substance and simultaneously spraying on the cores a liquid such as water or the like while supplying slit air to provide a fluidized condition; and then fixation treating the moist spherical particles by drying them while spraying an aqueous solution of the single substance or the like on the spherical particles in a fluidized bed apparatus; to the spherical particle produced by the process; and to a pharmaceutical preparation and a food containing the spherical particle.

The invention relates to an evaporative crystallization process, in particular to the multifunctional multi-effect automatic continuous evaporative crystallization process and a crystallization device. The process preheats unsaturated water solution or organic solution of materials and carries out the continuous evaporation to the material liquid by a multi-effect evaporator, the temperature of the multi-effect evaporator is gradually reduced and the vacuum degree is gradually increased; when the concentration of the material liquid achieves the saturation, the material liquid enters a crystallizer for the flash evaporation crystallization, and products after the crystallization are subjected to the solid-liquid separation in a centrifuge; the unsaturated solution after the centrifugalization is sent back to the device for the further evaporation crystallization, and the evaporated water or the organic solvent is recycled for use after cooling, thereby realizing the continuous production. The evaporative crystallization process can greatly reduce the labor use and improve the productivity, thereby directly bringing economic benefits to enterprises which use the device and simultaneously reducing the national energy consumption.

An antimicrobial agent includes silver-chloro complex salts and chloride, and further oxidizing agents such as sodium hypochlorite or sodium chlorite. As a result, it is possible to provide the antimicrobial agent having immediate and residual disinfecting and antimicrobial effects on bacteria and molds of a wide variety of species and capable of demonstrating instantaneous deodorizing effect. The antimicrobial agent includes the silver-chloro complex salts and chloride, and further a compound, for example, such as alcohols or surfactants, which has compatibility with a solvent such as water which dissolves the chloride. As a result, it is possible to provide the antimicrobial agent which can be used conveniently at the stored concentration, and which has immediate effect and cleansing ability without causing rust or deposition of salts in use. Further, the antimicrobial agent includes the silver-chloro complex salts, and chloride, for example, such as polyaluminium chloride or benzalkonium chloride, which has at least (I) a property capable of existing as a supersaturated aqueous solution in the presence of a crystal nucleus at least at room temperature for 24 hours or longer and (II) a property capable of being decomposed when dissolved in water.

The invention discloses a traditional Chinese medicine inclusion compound with an antibacterial effect and a textile finishing method of the traditional Chinese medicine inclusion compound. The traditional Chinese medicine inclusion compound is prepared from traditional Chinese medicine extract liquid with the total ingredient percentage being 100 percent and beta-cyclodextrin through a saturated water solution method, wherein the traditional Chinese medicine extract liquid comprises the following ingredients in percentage by mass: 25 percent to 60 percent of honeysuckle, 15 percent to 50 percent of folium Artemisiae argyi, 20 percent to 35 percent of liquorice and 5 percent to 15 percent of scutellaria baicalensis. The traditional Chinese medicine inclusion compound and cross linking agents are added into chitosan acetic acid solution to be prepared into antibacterial finishing liquid. A simple rolling baking process is adopted for carrying out antibacterial finishing on the cellulose fiber, the process is simple, the finished textile has the broad-spectrum antibacterial performance on common germs such as staphylococcus aureus, escherichia coli and the like, and in addition, the water washing resistance performance is good.

The invention discloses a preparation method of an NASICON-type lithium ion solid electrolyte. The method comprises the following steps: dissolving lithium nitrate and aluminum nitrate in a citric acid solution, and stirring to form a transparent and uniform nitrate mixed solution; dissolving tetrabutyl titanate in anhydrous ethanol, and stirring to form an alcoholic solution of tetrabutyl titanate; slowly adding the alcoholic solution of tetrabutyl titanate to the nitrate mixed solution, and stirring to a transparent mixed solution; dissolving ammonium biphosphate in water to obtain a saturated aqueous solution of ammonium biphosphate, adding the saturated aqueous solution of ammonium biphosphate to the transparent mixed solution in a dropwise manner, and stirring to obtain an emulsion; adjusting the pH value of the emulsion, and drying the emulsion to obtain an xerogel; carrying out heat treatment of the xerogel, and grinding the obtained xerogel to form fine powder which is precursor powder; and compacting the precursor powder to form a green body, and sintering to obtain NASICON-type lithium ion solid electrolyte slices. The method has the advantages of low energy consumption, simplicity, easy implementation, and convenience for large-scale industrialized production, and the obtained solid electrolyte has a high conductivity.

The invention provides a method for preparing sulfur and nitrogen co-doped titanium dioxide with visible light catalytic activity, which adopts a sol-gel method and comprises the following steps: hydrolyzing titanium ester and introducing sulfur and nitrogen sources to obtain a titanium dioxide sol, wherein the sulfur and nitrogen sources are from thiourea solution; in a sol system, dropwise adding 1 to 5 percent saturated aqueous solution of thiourea to perform the hydrolysis reaction to obtain the sol; then performing aging and volatilizing a diluent to obtain a titanium dioxide gel; drying the titanium dioxide gel and grinding into powders; performing heat treatment on the solid powder; and calcinating to obtain sulfur and nitrogen co-doped titanium dioxide nano powder. In the method, the thiourea is used as the raw materials of the nitrogen and sulfur sources, the sulfur and the nitrogen are simultaneously introduced in the process of the hydrolysis reaction of the sol to achieve synergistic effect and improve the reaction efficiency, raw material consumption is less, the process is simplified, the absorption range of visible light is effectively improved, the wavelength of the visible light is expanded to about 650nm, and the sulfur and nitrogen co-doped titanium dioxide has obvious visible light activity in the photocatalytic degradation reaction of organic pollutant molecules.

The invention discloses a process for preparing ultrapure nitric acid. The method comprises the following steps of: adding nitric acid metal salt to react with impurity anions, namely Cl<-> and SO4<2-> in industrial nitric acid serving as a raw material, precipitating, performing membrane filtration purification, rectifying to remove inorganic salt, regulating rectification liquid to form 69 to 70 weight percent nitric acid by using ultrapure water, white-blowing by using purified air in a white-blowing tower, absorbing blown nitrogen oxide by using saturated aqueous solution of sodium hydroxide, adding white-blowing liquid into a crude product groove, and performing membrane filtration to obtain the ultrapure nitric acid. The detection shows that: the content of the ultrapure nitric acidprepared by the process reaches 69 to 70 weight percent and various indexes of the product all meet the semiconductor equipment and material international (SEMI) C8 standard. The rectification is performed and waste acid is collected simultaneously, and the waste acid is treated and recycled, so that the quality and productivity of the product are improved; and the product has stable quality, lowimpurity content and high purity and is suitable for large-scale and continuous production.

The invention relates to a method for preparing saturated poly-chloralkane in the technical field of industrial organic chemical. The method comprises the steps as follows: 1, 1, 1, 1, 3-tetrachloropropane, inert organic solvent, a catalyst and a chlorinating agent are used as raw materials to prepare 1, 1, 1, 3, 3-pentachloropropane reaction liquid which is washed by reducing saturated aqueous solution; and solvent is distilled and recovered to prepared a pure product of 1, 1, 1, 3, 3-pentachloropropane. Compared with the prior art, the invention has the advantages of less investment on equipment, simple and easy operation, and being fit for mass production, etc. 1, 1, 1, 3, 3-pentafluoropropane (HFC-245fa for short) prepared from the 1, 1, 1, 3, 3-tetrachloropropane can be widely applied to the fields of solvent, cleaning, frothing, refrigerating, gaseous propellant and the like and has very high industrial value.

A humidity control device for use in maintaining the desired humidity for wood musical instrument, art objects and museum artifacts, the device including a water vapor permeable pouch and a saturated aqueous solution having a suitable humidity control point for use with these objects.

The invention discloses a method for preparing na-bentonite using ca-bentonite, the process of which is that pulverized ca-bentonite raw mine soil is added into the water solution which the dispersing agent (NaPO3)6 is already added, and are immersed, stirred and mixed evenly, then the modifier Na2CO3 is added to the saturated water solution; finally the working procedure of stirring and aging, heating and modifying, high speed dispersion, siphon and impurity removal, centrifugally purifying, flocculating and dewatering are performed in order to obtain the na-bentonite with high quality; the purifying and the modifying working procedure are performed at the same time, and the purifying operation passes through the whole working flow, thus na-bentonite with high quality and high purity comprising very high content of montmorillonite can be obtained. With flocculating and dewatering, the preparing method of the invention has the advantages that the problem of dewatering difficulty for wet modifying is effectively resolved, and the water after flocculating and dewatering is very convenient for recovery, thus the water consumption, the energy consumption and the processing time during drying in the wet modifying process are greatly decreased.

The invention relates to a preparation method of beta-cyclodextrin inclusion compound-containing electrospun fiber, which comprises the steps of: (1) preparing beta-cyclodextrin inclusion compound by a saturated water aqueous solution method or a grinding method; and (2) mixing water-soluble polymer solution with the prepared beta-cyclodextrin inclusion compound, and stirring to obtain spinning solution; and after that, carrying out electrostatic spinning to obtain the beta-cyclodextrin inclusion compound-containing electrospun fiber. The preparation method is simple and low in cost; the preparation method of the electrospun fiber can evenly disperse hydrophobic components, and is environment-friendly; the inclusion compound has good wettability, increases the solubility of medicine and improves the dispersion effect of the medicine in the spinning solution as well as the quality of the obtained electrospun fiber; and the electrospun fiber is smooth and uniform in surface, reduces the dosage of organic solvent and avoids the burst release of directly-loaded medicine.

An analysis method for a trace tobacco specific N-nitrosamine (TSNAs) in an animal blood sample is characterized by comprising the following steps of: placing the animal blood sample into a centrifuge tube with ethylene diamine tetraacetic acid EDTA-k2 saturated aqueous solution, performing the centrifugation at 10,000 rpm; adding the upper blood plasma into the mixed internal standard solution of NNN-d4, NNK-d4, NAT-d4, NAB-d4 and NNAL-d3; after standing for 30min to precipitate protein, and filtering upper solution; and detecting the content of the tobacco specific N-nitrosamine in the sample by adopting LC-MS/MS. The method has the advantages of exactly determining the content of the tobacco specific N-nitrosamine (TSNAs) and the content of metabolites thereof in the complex matrix sample of the animal blood. Compared with the prior art, the invention has the characteristics of simplicity in operation, high sensitivity and reliability in result, and creates the method of determining the content of the tobacco specific N-nitrosamine (TSNAs) and the content of the metabolites thereof in the complex matrix sample of the animal blood.

The invention discloses a method for preparing a melissa officinalis L. essential oil and beta-cyclodextrin molecule microcapsule and aims to improve the physical and chemical properties and the stability of the melissa officinalis L. essential oil and expand the application range of the melissa officinalis L. essential oil. The method comprises the following steps of: adding ethanol solution of the melissa officinalis L. essential oil into saturated aqueous solution of beta-cyclodextrin slowly, wherein the molar ratio of citral in the melissa officinalis L. essential oil to beta-cyclodextrin is 1:2, and the volume ratio of the melissa officinalis L. essential oil to ethanol is 3:100; oscillating the solutions for 3 hours at a rotating speed of 160r/min at the temperature of 30 DEGC for complete reaction, preserving a product of reaction at the temperature of 4 DEG C for 4 hours, standing, and precipitating; and filtering the obtained solution, and drying a precipitate at the temperature of 50-70 DEG C for 4 hours to obtain the melissa officinalis L. essential oil and beta-cyclodextrin molecule microcapsule. By encapsulating beta-cyclodextrin and the melissa officinalis L. essential oil, the powder of the molecule microcapsule has extremely good optical and thermal stability; the range of application of the melissa officinalis L. essential oil is expanded; and the method is simple and highly practical.

The invention provides an aqueous suspension/concentrate of a sparingly soluble borate, preferably as disclosed in Mondshine U.S. Pat. No. 4,619,776, which is effective in crosslinking aqueous solutions of a water soluble, borate-crosslinkable polymer, preferably guar gum and derivatives thereof. The aqueous suspension/concentrate comprises a saturated aqueous solution of a sparingly soluble borate, a suspension agent, suspended particles of a sparingly soluble borate, and optionally a stabilizing agent, wherein the saturated solution of the sparingly soluble borate is prepared prior to the particles of the sparingly soluble borate being suspended therein. The preferred suspension agent is a palygorskite clay such as attapulgite and sepiolite. The invention further provides a method of hydraulically fracturing a formation with the aqueous borate suspension/concentrate.

The invention relates to the medical technical field, in particular to a paeonol micro-emulsion preparation and a preparation method thereof. The paeonol micro-emulsion preparation consists of components with the weight percentage as follows: 0.1 percent to 2 percent of paeonol, 10 percent to 25 percent of surfactant, 5 percent to 30 percent of cosurfactant, 5 percent to 15 percent of oil phase and 40 percent to 70 percent of deionized water. The mouse percutaneous experiment in vitro shows that the paeonol micro-emulsion prepared by the invention has obviously higher capacity of penetrating through the horny layer than the saturated aqueous solution of paeonol (p is less than 0.05), and the paeonol micro-emulsion can penetrate into the skin deeply to take curative effect within a short time and also has certain sustained and controlled release function. At the same time, the paeonol micro-emulsion improves the solubility of the paeonol obviously, increases the drug loading quantity of the preparation and reduces the drug administration times and the dosage. The paeonol micro-emulsion preparation has simple preparation method and uniform grain diameter of the preparation, has the advantages of being safe, stable and efficient and, can be used for preparing dermal medication preparation or cosmetic.

The invention discloses metallic titanium doped carbon-coating lithium iron phosphate and a preparation method thereof, which belong to the technical field of battery material preparation. The lithium iron phosphate has the chemical formula: LiFe1-xTixPO4/C, wherein x is greater than 0 and is smaller than or equal to 0.2, and the C has the mass percent of 10%. The preparation method comprises thefollow steps of: weighing and proportioning lithium sources, Fe2O3, TiO2 and NH4H2PO4 at the mol ratio of lithium to iron to titanium to phosphorus being 1 to 1-x to x to 1, wherein x is greater than0 and is smaller than or equal to 0.2; then, grinding the materials after acetone addition, adding a saturated aqueous solution of citric acid after drying to be prepared into rheological phase precursor, grinding the precursor for 3 to 6h at the constant temperature of 400 DEG C under inert atmosphere and pressing the ground precursor into tight cylinder bodies; and finally, raising the temperature to 500 to 900 DEG C and roasting for 5 to 15h at the constant temperature to obtain the product. The prepared material has the characteristics of high capacity and high tap density; and the preparation method is simple, has lower cost and is applied to industrial production.

The invention belongs to the technical field of nanomaterials, and discloses a hydrophilic boron nitride nanosheet and a preparation method and application thereof. The preparation method specifically comprises the following steps that firstly, hexagonal boron nitride powder is dispersed in an alcohol solvent, and a certain quantity of alkali saturated aqueous solution is added; secondly, the alcohol dispersion solution of the boron nitride powder is put into a reaction kettle to be sealed, and reacts for a period of time under a high-temperature closed condition; thirdly, after the product is cooled to the room temperature, the product is washed with deionized water to be neutral after vacuum suction filtration, and freeze drying is conducted to obtain alkali ion intercalated boron nitride compound powder; fourthly, the composite powder is re-dispersed in deionized water, ultrasonic treatment is conducted for 10 minutes, and an aqueous dispersion solution of the boron nitride nanosheet can be obtained after dialysis and purification. The preparation method is simple in process, easy to operate, low in cost and environmentally friendly, the yield of the obtained boron nitride nanosheet is high, and the boron nitride nanosheet has good water dispersibility and stability. The hydrophilic boron nitride nanosheet has potential application prospects in the fields of drug carriers, biological sensing and the like.

The invention discloses a dual metal joint interface metallographic etching agent and a display method. The dual metal joint interface metallographic etching agent comprises the following components: a first etchant which is a mixed solution prepared from 6-10% of H2O2 water solution and 27% of ammonia water according to the volume ratio of 1 to 1, a saturated aqueous solution with 0.5-1 ml of potassium dichromate, and a second etchant which is 4-6% of HNO3 anhydrous ethanol solution by volume. The method comprises the steps of: sampling, preparing a sample, preparing an etching reagent, and displaying and obtaining a metallographic structure map of the sample. The agent disclosed by the invention is easily prepared; a copper and copper alloy/steel dual metal composite material joint interface structure can be rapidly and clearly displayed; and test and analysis of related performances of the novel composite material can be accurately carried out. By adopting the dual metal joint interface metallographic etching agent, performance improvement and failure analysis inspection abilities of a dual metal composite material member can be improved; and the etching agent has important directive significance on production and use.

A polishing composition containing a silica, an acid, a surfactant, and water, wherein (a) the acid has solubility in water at 25° C. of 1 g or more per 100 g of an aqueous saturated solution; (b) the surfactant is a sulfonic acid represented by the formula (1) or (2), or a salt thereof; and (c) the polishing composition has a pH of a specified range; and a polishing process of a substrate using the polishing composition are provided. The polishing composition is suitably used, for example in polishing a substrate for disk recording media such as magnetic disks, optical disks and opto-magnetic disks.

The invention relates to generation of a sodium dihydroxyl sulfonate compound by a substitution reaction of a saturated aqueous solution of sodium sulfite and a chloro dihydroxy compound; a dehydration reaction is carried out for the sodium dihydroxyl sulfonate compound obtained by the step and excess dehydrating agents, after the reaction, excess dehydrating agents are removed; residual sodium dihydroxyl sulfonate is removed by washing and extracting the reaction products; drying and purification are carried out in order to obtain a hydroxy substituted sultone compound; a fluorination reaction is carried out for the obtained hydroxy substituted sultone compound and a fluorating agent, underpressure distillation and purification are carried out, and the fluorosultone compound is obtained. The method has the advantages of cheap raw material, easy purchase, simple operation steps, mild reaction conditions, short reaction steps, easy purification, and high purity of produced products.

The invention relates to a method for synthesizing tri-amino trinitrobenzene (TATB) by trinitrotoluene (TNT), belonging to the field of organic synthesis technology. The method comprises the following steps of: dissolving the TNT into the concentrated nitric acid, heating up, adding the saturated water solution of the sodium chlorate, reacting, cooling and filtering to obtain the TNBA; adding the TNBA into the water, stirring, adding the sodium hydroxide water solution, filtering, heating up the filter liquor to perform the decarboxylation reaction, cooling, filtering and drying to obtain the TNB; dissolving the TNB into reagent, adding the TNB into turbid liquid mixed by the ammoniation reagent, the sodium methylate and the reagent, and stirring; and heating up, cooling after the reaction, pouring into the distilled water, adjusting the PH value to be neutral or weakly acidic by the acetic acid, stewing, filtering in a pumping way, washing with water, and drying to obtain the TATB. The method takes the TNT as the raw material and uses the chrome-free technology in the oxidizing reaction to avoid the environment pollution, uses a small quantity of the reagent during the aminating reaction to increase the concentration of the reactant and optimize the dynamic conditions, and uses a small quantity of the ammoniation reagent and the sodium methylate to reduce the cost.

The invention discloses Litsea cubeba essence oil clathrate and a preparation method of the Litsea cubeba essence oil clathrate. The method comprises the following steps: (1) preparing beta-cyclodextrin (beta-CD) saturated aqueous solution at a controlled temperature of 40-80 DEG C, stirring until smooth, and adding Tween 20 until the volume fraction of Tween 20 in beta-CD aqueous solution is 0.1%-0.5% to obtain Tween 20-containing beta-CD saturated aqueous solution; (2) adding Litsea cubeba essence oil into a solvent at volume ratio of 1:(1-4) to obtain Litsea cubeba essence oil solution; and (3) dropping Litsea cubeba essence oil solution into Tween 20-containing beta-CD saturated aqueous solution according to a ratio of 1:(8-12) mL/g of Litsea cubeba essence oil to beta-CD, stirring for 3-5 h at 40-80 DEG C, standing for 12-48 h at 0-4 DEG C for precipitation, filtering, collecting precipitate, washing, and freeze-drying to obtain Litsea cubeba essence oil clathrate. The clathrate can slowly release active ingredients of Litsea cubeba essence oil, has lasting effects in resisting mildew/bacteria and refreshing air, and is convenient to carry and use.