1835 results about "Aqueous solubility" patented technology

The invention relates to a particulate composition comprising, or substantially consisting of, urea, an inhibitor, preferably a urease inhibitor and / or a nitrification inhibitor, and an additive, wherein the additive comprises components (i) and (ii): (i) a carboxylic acid or an anhydride, salt, or derivative thereof; preferably a carboxylic acid salt or a carboxylic acid derivative, more preferably a carboxylic acid salt; and (ii) a polar polymer; preferably a water-soluble polar polymer. The invention further relates to a process for preparing the particulate composition, an additive for a particulate composition, and the use of the particulate composition as a fertilizer.

The invention discloses an impregnation liquid for preparing hydrogenated bisphenol A through bisphenol A hydrogenation. The impregnation liquid comprises a Ru complex, a water-soluble nonionic surfactant and water, wherein the molecular size of the Ru complex is greater than 1nm. According to the preparation method disclosed by the invention, by adopting the impregnation liquid containing the Ru complex of which the molecular size is greater than 1nm and the water-soluble nonionic surfactant, more Ru complex of which the molecular size is greater than 1nm can exist in mesoporous channels of an activated carbon carrier in an impregnation process, so that the contact probability of an active phase and a reactant bisphenol A molecule is increased; the purposes of improving the active metal utilization rate and improving the catalyst activity are achieved.

The invention discloses an oligopeptide from undaria pinnatifida and application thereof. The amino acid sequence of the oligopeptide is YRKD, and the molecular weight is 580.63 g / mol. The polypeptide is identified from undaria pinnatifida through a high performance liquid chromatography technology for the first time, and an unreported oligopeptide capable of inhibiting tyrosinase and cooperating with vitamin C to synergistically inhibit tyrosinase is screened out. The oligopeptide derived from undaria pinnatifida is synthesized by a solid phase method, has the characteristics of safety, no toxicity, good water solubility and good stability, and is combined with vitamin C to generate a synergistic effect and synergistically increase the inhibition effect on tyrosinase, so that the oligopeptide can achieve a better tyrosinase inhibition effect at a lower and more stable concentration; the use concentration of the oligopeptide can be greatly reduced, the stability is enhanced, and the oligopeptide can be widely applied to preparation of cosmetics, medicines, health-care products or food additives, and has important economic value and social significance.

The invention relates to a method for preparing lithium dihydrogen phosphate from a lithium-containing solution by using an extraction-reverse extraction technology, an extraction agent adopted in the method comprises a main extraction agent, a synergistic extraction agent and a diluent, the pKa value of the main extraction agent is 2.2-7, the synergistic extraction agent has a P = O group or a cavity diameter of 0.12-0.15 nm, the water solubility of the synergistic extraction agent is less than or equal to 50 mg / L, and the diluent is a diluent. The synergistic extraction factor R of the extraction agent is more than 100, R = Dmix / (D1 + D2), Dmix is the extraction distribution ratio of the main extraction agent to the lithium when the main extraction agent and the synergistic extraction agent are mixed according to the mass ratio of 1: 1-1: 2, D1 is the extraction distribution ratio of the main extraction agent to the lithium, D2 is the extraction distribution ratio of the synergistic extraction agent to the lithium, and the stripping agent is phosphoric acid. According to the method disclosed by the invention, by selecting the main extraction agent and the synergistic extraction agent, on one hand, lithium monohydrogen phosphate and lithium phosphate impurities cannot be generated by reaction when phosphoric acid is adopted for reverse extraction, and on the other hand, higher separation degree on sodium and potassium can be achieved during extraction, so that high-purity lithium dihydrogen phosphate can be efficiently prepared.

The invention belongs to the technical field of electrocatalysts, and discloses a method for preparing a heterogeneous monomolecular electrocatalyst by using water-soluble metalloporphyrin / phthalocyanine and a carbon carrier and application of the heterogeneous monomolecular electrocatalyst. The method comprises the following steps: 1) dissolving water-soluble metalloporphyrin / phthalocyanine in water to obtain a water-soluble metalloporphyrin / phthalocyanine solution; 2) soaking the electrode coated with the nanoscale carbon material in a water-soluble metalloporphyrin / phthalocyanine solution; or uniformly mixing the carbon nanomaterial organic solvent dispersion liquid with a water-soluble metalloporphyrin / phthalocyanine solution to obtain a composite catalyst; and dispersing the composite catalyst in an organic solvent, uniformly mixing with a binder solution, coating an electrode with the mixture, and drying to obtain the heterogeneous monomolecular electrocatalyst. The method disclosed by the invention is simple, catalyst molecules can be completely dispersed and adsorbed on a nanoscale carbon material in a single molecule form, and active sites are improved; the prepared monomolecular electrocatalyst is used for electrocatalysis of carbon dioxide reduction reaction, and high product selectivity and stability of carbon dioxide reduction can be realized.

An “inverse” precipitation route to precipitate aqueous soluble species with copolymers as nanoparticles having a hydrophilic, polar core and a less polar shell is described.

The invention relates to a method for preparing lithium phosphate from a lithium-containing solution by using an extraction-reverse extraction technology, an extraction agent adopted in the method comprises a main extraction agent, a synergistic extraction agent and a diluent, the pKa value of the main extraction agent is greater than 12.5, the synergistic extraction agent has a P = O group, a hydroxyl group or a cavity diameter of 0.12-0.15 nm, the water solubility of the synergistic extraction agent is less than or equal to 50 mg / L, the viscosity is less than or equal to 50 mpa.s, and the diluent is a diluent. The synergistic extraction factor R of the extraction agent is more than 100, R = Dmix / (D1 + D2), the Dmix is the extraction distribution ratio of the main extraction agent to lithium when the main extraction agent and the synergistic extraction agent are mixed according to the mass ratio of (1: 1)-(1: 2), the D1 is the extraction distribution ratio of the main extraction agent to lithium, the D2 is the extraction distribution ratio of the synergistic extraction agent to lithium, and the stripping agent is phosphoric acid. According to the method disclosed by the invention, by selecting the main extraction agent and the synergistic extraction agent, on one hand, lithium monohydrogen phosphate and lithium dihydrogen phosphate impurities cannot be generated by reaction when phosphoric acid is adopted for reverse extraction, and on the other hand, sodium and potassium can be separated at a higher degree during extraction, so that high-purity lithium phosphate can be efficiently prepared.

According to the fisetin nanoparticle preparation method, the fisetin nanoparticle product and the application, the synergistic effect of amino acid catalysis and a microwave or ultrasonic energy field is matched with mixing self-assembly and subsequent spray drying forming under the acidic condition, on one hand, the traditional Maillard reaction period is greatly shortened, and energy consumption is reduced; on one hand, the whole technological process of wall material preparation and active ingredient loading is simplified, the large-scale production requirement is met, on the other hand, the fisetin encapsulation effect and the nanoparticle structure stability are improved, the defects that fisetin is poor in water solubility and low in bioavailability are overcome, meanwhile, it is guaranteed that the nanoparticle product quality is uniform, the technology efficiency and the product performance superiority are considered, and the method is suitable for industrial production. The core pain points of low efficiency, poor drug loading effect and insufficient product stability of the existing traditional process are effectively overcome.

The invention provides a thickening agent for an oil field fracturing fluid, a preparation method of the thickening agent and the fracturing fluid, and belongs to the technical field of fracturing fluids. Comprising a polymer, a synergist, a salt-resistant component, a structure regulator, a suspending agent and an emulsifier. The polymer prepared by the invention contains abundant anions and cations, including quaternary ammonium salt cation structures, sulfonate anions and the like, and molecular winding can be realized through mutual attraction of the anions and cations, so that the elasticity modulus is increased, the sand-carrying performance is improved, and the sand-carrying and thickening performance of the thickening agent is improved; the fracturing fluid has good temperature resistance, salt resistance, shearing resistance, water solubility and thickening property, integrates the functions of drag reduction, sand carrying, fracture forming, swelling prevention, discharge aiding, low damage and the like, and has wide application prospects.

The invention relates to the technical field of fullerene derivatives, in particular to a structure-determined fullerene derivative, a structure-determined water-soluble fullerene derivative and preparation methods and applications of the structure-determined fullerene derivative and the structure-determined water-soluble fullerene derivative. The invention provides a fullerene derivative with a determined structure. The structural formula of the fullerene derivative is shown as (VII). The invention also provides a method for preparing the fullerene derivative with the determined structure shown as (VII). The water-soluble fullerene derivative determined by the structure as shown in (VII) provided by the invention has good water solubility and oxidation resistance.

The invention discloses giant salamander grease and application thereof in a blood fat reducing product. The giant salamander grease is obtained by adding papain into giant salamander tissues for enzymolysis and then adsorbing by using an egg white modified microsphere adsorbent. The giant salamander grease is refined by using the egg white modified microsphere adsorbent, and then the giant salamander grease is compounded with the dark tea extract, the hawthorn extract and the lotus leaf extract and processed into embedded particles, so that the water solubility of the giant salamander grease preparation can be improved, and the giant salamander grease preparation can be used as an oral preparation for reducing blood fat.

The invention relates to a selective nanofiltration membrane as well as a preparation method and application thereof. The selective nanofiltration membrane comprises a support layer and a separation layer, the separation layer is obtained through interfacial polymerization of an oil-phase reactant and a water-phase reactant; the water-phase reactant comprises a negatively charged monomer and a positively charged monomer; the positively charged monomer comprises any one or a combination of at least two of polyvinylamine, polyethyleneimine, diethylenetriamine, water-soluble chitosan, quaternized polyethyleneimine, polyallylamine or triethylene tetramine. According to the method, monomers with different charges are added into a water phase, so that the nanofiltration membrane is wholly charged and neutral, the interception of sodium sulfate can be effectively reduced, the interception of antibiotics is increased, and the separation of the antibiotics and inorganic salts can be efficiently promoted.

The invention relates to the field of cosmetics, in particular to skin moistening oil containing a water-soluble active matter and a preparation method of the skin moistening oil. The skin moistening oil of the water-soluble active matter is prepared from the following raw materials in parts by mass: 0.1-1 part of a phase A, 3-15 parts of a phase B and 80-100 parts of a phase C, wherein the phase A is a water-soluble component, and the water-soluble component comprises one or more of deionized water, VC ethyl ether and nicotinamide; the phase B is a solvent, and the solvent comprises one or more of ethyoxyl diethylene glycol, 1, 2-pentanediol, isopentanediol and isostearic acid; the phase C is skin moistening oil, and the skin moistening oil comprises caprylic / capric triglyceride. The skin moistening oil product provided by the invention has the advantages of clear and transparent appearance, good fluidity, excellent stability, no need of adding a surfactant or a solubilizer, mildness, no irritation, simple process, controllable cost, good practical value and good application prospect.

The application relates to a quality inspection technology of inorganic salt, and discloses a detection reagent and a rapid detection method for high-purity lithium carbonate. A water-soluble fluorescent probe detection reagent is obtained by using 2-(4-chlorophenyl) benzoxazole, 2-(2-hydroxyphenyl) benzoxazole and other benzoxazole compounds as a substrate, and by modifying the substrate with glycerol, tris(hydroxyl) aminomethane and other compounds; high-purity lithium carbonate is detected by using the detection reagent; the high-purity lithium carbonate is solid-phase prepared into lithium carbonate suspension liquid; the upper liquid phase of the lithium carbonate suspension liquid is taken; the fluorescent probe detection reagent is added into the upper liquid phase; and the high-purity lithium carbonate is rapidly detected according to the fluorescent spectrum and a working curve. The application can realize the rapid detection of the high-purity lithium carbonate in a water-soluble environment, and the detection response time can be as short as 3-10 seconds.

The application discloses a hydrogel kit capable of quick dissolution on demand, comprising a gel system and a dissolving solution, and the volume ratio of the gel system to the dissolving solution is 1:(2-10). The aldehyde group-terminated star-shaped multi-arm polyethylene glycol gel system and the dissolving solution of the water-soluble amino compound jointly act, so that the gel can be quickly degraded, the gel degradation is realized within half an hour, and the problem that inflammation is caused to the body after the gel is completed is avoided. Moreover, the pH of the water-soluble amino compound dissolving solution is controlled to be 3-7.5, the low-temperature quick degradation of the gel system can be realized, and the degradation time is controlled to be less than 30 min. The application range of the gel is greatly widened, and the long-term foreign body stimulation side effect on patients is reduced.

The invention belongs to the technical field of petrochemical anticorrosion, and provides a multifunctional water-soluble corrosion inhibitor for an oil refining device and a preparation method of the multifunctional water-soluble corrosion inhibitor, and the corrosion inhibitor is a functionalized grafted copolymer obtained by a ring-opening reaction of a succinimide ring on a polysuccinimide intermediate and a plurality of amino-containing compounds; the amino-containing compound at least comprises gemini imidazoline quaternary ammonium salt with a corrosion inhibition function; a polyaspartic acid chain segment precursor with scale inhibition and dispersion functions; the organic amine compound has targeted chelating and pH buffering functions and contains sulfonic acid groups and carboxyl groups; according to the invention, double-anchored gemini imidazoline quaternary ammonium salt is taken as a corrosion inhibition core, and a polysuccinimide ring-opening grafting process is combined, so that chain segments with corrosion inhibition, scale inhibition, targeted buffering and temperature-sensitive self-repairing functions are covalently integrated into a same polymer main chain, and multi-functional efficient protection of a single agent in an oil refining device water phase system is realized.

The invention discloses a 4-BrPA / beta-CD supramolecular photosensitizer as well as a preparation method and application thereof, and belongs to the field of biomedical materials. According to the method, beta-cyclodextrin is used as a subject, 4-bromophthalic anhydride is used as an object, and the water-soluble photosensitizer is constructed through a chemically modified supramolecular assembly strategy. The preparation method comprises the following specific steps: reacting beta-cyclodextrin with paratoluensulfonyl chloride to obtain mono-(6-O-paratoluensulfonyl)-beta-cyclodextrin; then carrying out a reaction with ethidene diamine to obtain mono-(6-ethidene diamine-6-deoxy)-beta-cyclodextrin; then reacting with 4-bromophthalic anhydride in N, N-dimethylformamide, and precipitating and purifying through ethyl acetate to obtain a crude product; and finally, carrying out ultrasonic treatment, centrifugal separation and freeze drying to obtain a pure product. The prepared 4-BrPA / beta-CD supramolecular photosensitizer is excellent in water solubility, has at least 7 excitation centers in a visible light region of 400-520 nm, correspondingly generates at least 7 emission centers in a range of 500-780 nm, has a maximum excitation wavelength of about 460 + / -10 nm and a maximum emission wavelength of about 620 + / -10 nm, has an extremely wide visible light response characteristic, and can be used for antibacterial photodynamic therapy.

The invention provides a semi-interpenetrating network polymer plugging agent for drilling fluid and a preparation method and application thereof, and the preparation method comprises the following steps: 1) mixing an oil-soluble monomer A and an oil-soluble polymer B, and completely dissolving the oil-soluble polymer B to obtain an oil phase; 2) mixing an emulsifier A, an emulsifier B, a water-soluble organic monomer C and water to obtain a water phase; 3) mixing 65-70% of the oil phase and the water phase, and emulsifying to obtain an emulsion reaction mixed solution; (4) carrying out heat-preservation polymerization on the emulsion reaction mixed solution and a section of initiator to obtain a polymerized emulsion; and 5) continuously carrying out heat preservation polymerization on the polymerized emulsion, 30-35% of the remaining oil phase, a cross-linking agent and a second-stage initiator to obtain the semi-interpenetrating network polymer plugging agent. The plugging agent has temperature resistance, elastic deformability and cohesiveness, the temperature resistance can reach 180 DEG C, the plugging agent is good in compatibility with oil-based drilling fluid and water-based drilling fluid, the filtration loss reduction and plugging effects are obvious, and the plugging agent can be used for plugging high-temperature strata; and the adhesive wall protection effect is also achieved.

The invention belongs to the technical field of coal mine machinery lubrication and hydraulic transmission, and discloses an environment-friendly total-synthesis concentrated solution for a hydraulic support and a preparation method of the concentrated solution. The biological sensing microcapsule corrosion inhibitor is characterized by comprising 0.5%-3.0% of a biological sensing microcapsule, 8.0%-15.0% of a main corrosion inhibitor, 2.0%-6.0% of an auxiliary corrosion inhibitor, 4.0%-10.0% of a water-soluble lubricant, 0.05%-0.2% of an anti-foaming agent, 1.0%-3.0% of a pH buffering agent and deionized water. Wherein the biological sensing microcapsule has a core-shell-shell structure, is integrated with electroactive microorganisms, an electron mediator carrier and a corrosion inhibition precursor release layer, and can trigger targeted release of benzotriazole derivatives when the pH value of a local corrosion microarea is less than or equal to 5.5. The corrosion inhibitor has excellent corrosion protection performance and environment-friendly characteristics, effectively overcomes the problem of inactivation of microorganisms under severe hydraulic working conditions through a microcapsule encapsulation strategy, realizes accurate matching of corrosion signal in-situ sensing and corrosion inhibition response, remarkably improves the anti-rust performance under high-shear and wide-temperature-range working conditions, and has wide application prospects. And meanwhile, the requirements of environmental protection and sealing material compatibility are met.

The invention discloses a mitochondrial / lysosome dual-targeting viscosity response AIE probe as well as a preparation method and application thereof. According to the probe, tetraphenylethylene (TPE) is used as an AIE light-emitting framework, and two flexible side chains containing hydrophilic units are introduced by utilizing the excellent structural modifiability of the TPE. The tail end of each side chain is modified with a trimethylamine group, quaternary ammonium salt cations derived from the trimethylamine group have localized positive charges, and combination with water molecules can be enhanced through ion-dipole interaction, so that the water solubility and biocompatibility of the molecules are effectively improved. Based on the design, the invention provides the AIE polymer probe which is constructed by taking TPE as a core and taking an amphiphilic flexible chain as a functional unit. The probe can establish a three-dimensional linear relationship among drug action time-regional viscosity-fluorescence lifetime (t-eta-tau) by capturing fluorescence lifetime signals inside and outside cells, so as to realize visual detection and quantitative analysis of average viscosity change of mitochondria and lysosome in the mitochondrial autophagy process.

The application provides a high-stability salt-free meat protein beverage and a preparation method thereof, and relates to the field of food. The method comprises the following steps: extracting myofibrillar protein in chicken, washing the myofibrillar protein with water to remove salt in the myofibrillar protein, and obtaining salt-free myofibrillar protein; dissolving the salt-free myofibrillar protein in water to obtain a salt-free myofibrillar protein solution; and dissolving high-charge-density sodium carboxymethyl cellulose in the salt-free myofibrillar protein solution and uniformly mixing. The high-charge-density sodium carboxymethyl cellulose is combined with meat protein in a non-covalent form to form a complex, the charge property of the meat protein is changed, the self-assembly behavior of the myofibril is hindered, and the aggregation is inhibited, so that the water solubility of the meat protein is improved; the steric hindrance effect and the electrostatic repulsion of the system are greatly improved, so that the thermal stability of the meat protein is greatly improved, and the instability effect of the meat protein in the heat processing process is effectively avoided. The clear and transparent salt-free beverage product with good stability can be processed by using the method.

Provided is a water-soluble polymer that has a low viscosity and can withstand use in strongly acidic or powerfully oxidizing environments such as in hydrogen peroxide.　A polymer according to the present invention includes a structural unit represented by formula (1) and has a viscosity of at least 10 mPa·s in a 10 mass% aqueous solution. (In formula (1), m and n are 0 or 1, m+n=1, and R1–R5 represent a hydrogen atom, a C1–8 alkyl group or hydroxyalkyl group, or a phenyl group.)

The application discloses a method for rapidly and harmlessly treating phosphogypsum, and particularly relates to the harmless treatment technical field of industrial solid waste. The method comprises the following steps: mixing raw materials with an alkaline neutralizing agent, a trapping agent and an activating agent, adding a phosphorus solidifying agent and a fluorine solidifying agent, mixing, carbonizing and aging, and obtaining harmless phosphogypsum. The method adopts the alkaline neutralizing agent to rapidly neutralize free acid and improve the pH of the system; the trapping agent adsorbs heavy metals; the activating agent promotes As, Cd and the like to form a difficult-to-dissolve iron oxide gel or a precipitate; the phosphorus solidifying agent and the fluorine solidifying agent perform deep chemical precipitation to form a stable iron-calcium-phosphate / ferric fluoride composite solidified body. The functions of the agents are clear, and the agents have synergistic effects; the solidification effect of the agents on high water-solubility phosphorus, fluorine and various heavy metals is far better than that of a single or simply compounded agent system; and the leaching concentration can be reduced to a level far lower than the national standard.

This invention provides an inkjet recording method that enables the recording of images with minimal misalignment of grid lines, even when recording images using a recording head having overlapping sections where the end ejection ports of adjacent ejection port rows overlap. [Solution] An inkjet recording method comprising the step of discharging aqueous ink from end discharge ports constituting an overlapping portion, allocated to a first discharge port row and a second discharge port row, to record an image on a recording medium, wherein the viscosity of the aqueous ink is 4.0 mPa·s or more, and the water-soluble organic solvent contains a water-soluble organic solvent (A) with a vapor pressure of 0.030 Pa or more and 0.200 Pa or less at 25°C, and a water-soluble organic solvent (B) with a vapor pressure of 1.000 Pa or more at 25°C, wherein the content (mass%) of water-soluble organic solvent (A) is 0.30 times or more by mass ratio to the content (mass%) of water-soluble organic solvent (B).

The application discloses a food-grade O / W quercetin microemulsion and a preparation method and application thereof, and each component and weight percentage are as follows: 10%-42% of a surfactant, 2%-32% of an oil phase solution, and the balance of water; wherein the oil phase solution is composed of isopropyl myristate and ethanol, and the weight ratio of isopropyl myristate to ethanol is 1:1-4. The O / W microemulsion preparation method is simple, is a good carrier of active substances or functional substances represented by quercetin which has poor stability and water solubility, so that the stability of the active substances or functional substances in pharmaceutical preparations is improved, and the sustained release behavior is improved.

The invention provides a posaconazole ethosome and a preparation method thereof, posaconazole is encapsulated in ethosome, and the posaconazole ethosome is composed of the following components by weight: 0.1-5% of posaconazole, 0.1-5% of posaconazole, 0.1-5% of posaconazole, 0.1-5% of posaconazole, and the balance of ethanol. 1-8% of phospholipid; 0%-0.5% of cholesterol; 20%-45% of ethanol; 0-0.1% of an antioxidant; 0%-0.5% of a nonionic surfactant; and 40.9 to 78.9 percent of water. The invention has the characteristics of high encapsulation efficiency, uniform particle size distribution and no irritation to skin. And the ethosome can load both water-soluble drugs and fat-soluble drugs, and has the advantages of simple composition, high encapsulation efficiency, uniform particle size distribution, no skin irritation, simple preparation and the like.

This invention relates to the field of food preservation technology and discloses a liquid preservative for preserving fresh walnut kernels. The preservative comprises a natural preservative, a solubilizing and stabilizing agent, and a solvent. This liquid preservative uses natural phloretin as the preservative component, combined with Tween 80 as a solubilizing and stabilizing agent and ethanol as a solvent. This effectively solves the problems of poor water and oil solubility and inadequate stability of phloretin, allowing it to be stably dispersed in the preservative system and fully exert its antioxidant and antimicrobial effects. Furthermore, the preparation method is simple and easy to implement, and the production process is safe and controllable. It is convenient to use; the preservation of fresh walnut kernels can be achieved through dilution and soaking. The diluted solution can be reused, reducing usage costs. Simultaneously, it can inhibit bacterial growth during the storage of fresh walnut kernels, delay oxidative deterioration, maintain their good appearance and quality, extend shelf life, and meet the market demand for high-quality fresh walnut kernels.