724 results about "Solubility" patented technology

The invention discloses a method and a system for identifying mixed gas in transformer oil, a product and a medium, and relates to the technical field of testing or analyzing materials by means of measuring chemical or physical properties of the materials, and the method comprises the following steps: acquiring an internal structure diagram of a transformer, determining spatial position relations of parts and corresponding temperature distribution characteristics, and obtaining solubility differences of different spatial positions according to the spatial position relations and the corresponding temperature distribution characteristics. During operation, mixed gas concentration data of a plurality of detection points are collected, initial gas concentration data are recorded when an operation threshold range is deviated, and gas concentration change data are corrected according to solubility differences of different temperature zones. Calculating gas concentration space-time distribution characteristics, and determining a gas accumulation area according to the gas concentration space-time distribution characteristics and a space position relation. And separating the mixed gas components by using a gas chromatographic method, comparing preset gas types with the content of each component, and determining the corresponding gas type of each internal region. By implementing the method, the accuracy of identifying the types of the mixed gas in the transformer oil can be improved.

The invention provides slick water fracturing fluid as well as a preparation method and application thereof. The slick water fracturing fluid comprises chitosan, a polymer matrix, paraformaldehyde and a solvent. In the slick water fracturing fluid provided by the invention, the chitosan and the polymer are fully dissolved, and the main chains of the two polymers are physically interpenetrated and wound. In the presence of paraformaldehyde, a polymer main chain is chemically crosslinked with paraformaldehyde to form a primary network structure. Then, chitosan and molybdenum disulfide can form coordination cross-linking sites, a secondary network structure is obtained, then a multi-network structure which cannot be split is formed, and the viscosity is high; moreover, the components have good solubility in the solvent, are easy to mix on line and are relatively low in preparation cost.

The invention provides a novel crystal form of rosemeltirome and a preparation method thereof. And the crystal form of the APTI-II and the crystal form of the APTI-III are as follows. The crystal forms are easy to prepare and high in purity. Particularly, the crystal form APTI-III has good stability and good solubility in a water solvent, and is suitable for industrial large-scale production and preparation of pharmaceutical preparations.

A radiation-sensitive composition containing: a polymer that undergoes a change in solubility in a developing solution when subjected to the action of an acid; and a compound represented by formula (1).

The invention belongs to the technical field of 4-BMA mother liquor recycling, and relates to a method for recycling 4-BMA in mother liquor by adopting a membrane treatment technology, which comprises the following steps: dropwise adding isopropylamine into 4-BMA refining wastewater, adjusting the pH value to 8-9, selecting a proper filter membrane, and filtering by using membrane filtering equipment at a certain temperature to obtain concentrated liquor and permeate liquid; the maximum separation effect is achieved by controlling the volume ratio of the permeate to the concentrated solution, and the 4-BMA isopropylamine salt concentrated solution is obtained; ethyl acetate is added into the 4-BMA isopropylamine salt concentrated solution for extraction, then 13.5 wt% hydrochloric acid is dropwise added for crystallization, and a 4-BMA product is obtained. According to different solubility of 4-BMA, isomer and isopropylamine after salification in water, the isomer salt is dissolved in water to be removed, 4-BMA salt with high purity is obtained, qualified 4-BMA with the purity larger than or equal to 98.00% is obtained through acid adjustment, and the purity of 4-BMA is larger than or equal to 98.00%. The method is low in energy consumption, simple in process, simpler to operate and easier to convert.

This resist composition contains: a resin component (A1), the solubility of which in a developer solution changes due to the action of an acid; and a compound (D0) represented by general formula (d0-1). In the formula, Ar is an aromatic ring; OH is a hydroxy group; Xd01 is an iodine atom, a fluorine atom, a bromine atom, or a fluorinated alkyl group; Ld is a single bond or a divalent linking group; Z+ is S+ or I+; and Xd02 is an iodine atom, a fluorine atom, a bromine atom, or a fluorinated alkyl group. [Chemical formula 1]

The invention provides a novel crystal form and a novel crystal form APTI-I. The novel crystal form and the novel crystal form APTI-I are radiated by Cu-K alpha, and an X-ray powder diffraction pattern represented by a 2 theta angle has characteristic peaks at 5.0 degrees + / -0.2 degrees, 6.3 degrees + / -0.2 degrees, 7.8 degrees + / -0.2 degrees, 12.2 degrees + / -0.2 degrees and 20.0 degrees + / -0.2 degrees. The crystal form is easy to prepare, high in purity, good in stability, good in solubility in buffer solutions and deionized water solvents with different pH values, and suitable for industrial large-scale production and preparation of pharmaceutical preparations.

Provided are an aqueous composition and printed matter that achieve both adhesion to a base material and film removability during recycling and pose little risk to humans or the environment. The aqueous composition contains at least a photopolymerization initiator, a polymerizable compound, a resin component, and water. The photopolymerization initiator has a solubility in the water of 1 wt% or more and has an absorption wavelength peak within the range from 350 nm to 400 nm. The polymerizable compound has a solubility in the water of 1 wt% or more and has a plurality of polymerization-reactive functional groups. The aqueous composition is in the form of an emulsion in which the resin component is dispersed in the water.

The invention provides a manganese sulfate purification method based on a membrane separation technology, and relates to the technical field of manganese sulfate purification, the manganese sulfate purification method comprises the following steps: S1, pretreatment and solution blending: starting a stirring tank for stirring at a stirring speed of 230-500 RPM; adding a raw material solution into the stirring tank; adding a mixed solvent into the raw material solution, wherein the total adding amount of the mixed solvent accounts for 1-2% of the mass of the raw material solution; according to the preparation method, a mixed solvent and a stability additive are introduced in the raw material solution preparation stage, and the stirring speed and the reaction temperature are regulated and controlled, so that the uniformity and the system stability of raw material components are enhanced, the solubility and the dispersity of impurity components are reduced, and subsequent impurities are promoted to be thoroughly and sufficiently settled; in the chemical precipitation stage, precipitation of the impurities is accelerated by controlling the proportion of a precipitator, the reaction temperature and the stirring speed, so that the precipitation rate and the particle size uniformity of precipitated particles are improved, and the impurities are fully separated from a main solution.

The invention provides a method for in-situ determination of mineral volume and solubility in DAC, which comprises the following steps: loading a to-be-measured sample and a solvent into a DAC sample cavity, generating an initial three-dimensional image of the to-be-measured sample at normal temperature and normal pressure through a Raman spectrum three-dimensional imaging technology, and calculating the initial volume # imgabs0 # of the to-be-measured sample; after the temperature and pressure are increased to a target condition and stabilized, generating a real-time three-dimensional image of the to-be-detected sample through a Raman spectrum three-dimensional imaging technology, and calculating the volume # imgabs1 # of the to-be-detected sample under the target condition; and calculating the mass difference value of the sample under the normal temperature, normal pressure and target conditions by combining the volume compression coefficient and thermodynamic parameters of the to-be-detected sample, and calculating the solubility # imgabs2 # according to the mass difference value and the mass of the solvent. The method is simple to operate, high in accuracy and wide in universality, can solve the problems of dependence on a standard curve, complex experimental operation, sensitivity to instrument performance and environmental factors and the like in a traditional method, and is suitable for in-situ solubility determination of minerals and organic matters.

The application discloses a solid dispersion of tolvaptan, and the raw material composition of the solid dispersion comprises tolvaptan, a hydrophilic carrier material, a hydrogen carbonate, and can further comprise a plasticizer and / or an organic acid. The solid dispersion is prepared by a hot melt extrusion process, the solubility of tolvaptan raw material can be obviously increased, and the oral preparation prepared from the solid dispersion can meet the sink condition of dissolution detection, and the accuracy of the detection result is ensured.

A chemically amplified negative resist composition containing (A) a base polymer containing a polymer which contains a repeat unit having formula (A1) and a repeat unit having formula (A2), the polymer being adapted to decrease its solubility in an aqueous alkaline solution under an action of an acid.

The invention belongs to the field of medicine, health and health, and particularly relates to a preparation method for controllably synthesizing polysulfonic acid mucopolysaccharide with different molecular weights, which comprises the following steps: reaction, acid-base neutralization, formamide removal by alcohol precipitation, desalting and freeze-drying. Wherein the reaction process comprises the following steps: adding sodium chondroitin sulfate and a pyridine sulfur trioxide complex into a mixed solvent of N, N-dimethylformamide and dimethyl sulfoxide, and heating for reaction to obtain a reaction mixture; the volume fraction of the dimethyl sulfoxide in the mixed solvent is 0-80%. According to the method, the low-price pyridine sulfur trioxide complex (about 150 yuan / 500g) is used, and the ratio of N, N-dimethylformamide to dimethyl sulfoxide in the mixed solvent is adjusted, so that the solubility of the chondroitin sulfate sodium and the pyridine sulfur trioxide complex is changed, and the polysulfonic acid mucopolysaccharide with molecular weights in different ranges can be regulated and generated.

Described are sprayable compositions containing oil-in-water emulsions. The emulsions contain (i) submicron particles of one or more hydrophobic agent(s), (ii) an emulsifier system comprising one or more nonionic surfactant(s) or emulsifier(s), and (iii) an aqueous-solute fluid. The submicron particles of one or more hydrophobic agent(s) are present in an amount from about 0.01% wt. to about 70% wt., the one or more nonionic surfactant(s) or emulsifier(s) are present in an amount from about 0.01% wt. to about 10% wt., and the aqueous-solute fluid is present in an amount from about 1.0% wt. to about 98.5% wt., all based on the total weight of the sprayable composition. The submicron particles of one or more hydrophobic agent(s) (i) have an average particle size from about 100 nm to less than about 1000 nm, (ii) have a solubility of less than about 0.1% by weight in water under standard conditions, and (iii) are 85% or more of a size within ±2.0 standard deviations, of the average particle size. The one or more nonionic surfactant(s) or emulsifier(s) comprise ester(s) of one or more fatty acid moieties with one or more hydroxyl groups of glycerol or polyglycerol having a HLB from about 3 to about 20, based on the degree of glyceryl units or ethoxyl units, or combinations thereof; and optionally ester(s) of one or more fatty acid moieties with one or more hydroxyl groups of sucrose having a HLB from about 2 to about 18, based on the degree of glyceryl units or ethoxyl units, or combinations thereof. The one or more nonionic surfactant(s) or emulsifier(s) are sufficient to stabilize the submicron particles of one or more hydrophobic agent(s) in the emulsion, at a level from about 0.05% w / w to about 70% w / w of said one or more hydrophobic agent(s), in the emulsion. Also described are processes of making the emulsions, and methods of use of the emulsions. The emulsions are useful, for example, in nutritional, pharmaceutical, biomedical, over-the-counter (OTC) drug, cosmetic, food, personal care, animal care, veterinary health, household, pet care, and other applications.

The invention belongs to the technical field of synthesis of food additive cooling agent intermediates, and particularly relates to a method for efficiently preparing 2, 2-diisopropyl propionitrile. According to the method, the solubility of sodium amide is promoted through the complexing action of the nitrogen-containing organic solvent in the reaction process, the reaction rate is increased, the situation that ultralow-temperature conditions and pressure-resistant equipment need to be used in the reaction process is avoided, and the operation difficulty of the reaction is reduced. The technical scheme provided by the invention simultaneously has the advantages of a liquid ammonia method and a solvent method in the prior art, the production energy consumption is reduced, the reaction rate is accelerated, and the production safety coefficient is improved. The industrial production is favorably realized.

A battery includes a cathode comprising a disordered rock salt structure and an electrolyte. The electrolyte includes a solvating solvent and a lithium salt soluble in the solvating solvent. The electrolyte includes a diluent that is miscible with the solvating solvent. The solubility of the lithium salt in the solvating solvent is at least 5 times the solubility in the diluent, and the solvating solvent and the diluent are present in the battery at a diluent / solvating solvent ratio of 0.1 to less than 3.0.

The present invention relates to the field of pharmaceutics, and discloses a water-in-water deep eutectic solvent microemulsion, which comprises: a hydrophobic deep eutectic solvent, which is prepared by mixing at least two components according to a specific ratio, and the two components are respectively a terpenoid solvent and a fatty acid solvent; an emulsifier; an aqueous phase comprising an emulsifier and water; wherein the microemulsion is an oil-in-water type microemulsion, and the average particle size of the microemulsion is less than 300nm; the hydrophobic deep-eutectic solvent is a solvent prepared by mixing a diterpenoid solvent and a fatty acid solvent according to a weight ratio of 1: 9 to 9: 1. By adopting the deep eutectic solvent technology, the hydrophobic deep eutectic solvent is used for replacing a traditional oil solvent, the solubility of the quercetin is effectively improved, and the highest drug loading capacity of the quercetin in the preferable hydrophobic deep eutectic solvent can reach 23 mg / mL and is improved by 2000-3000 times compared with the highest drug loading capacity of the quercetin in water which is only 1 microgram / mL.

Provided is a resist composition which generates an acid upon exposure to light, and the solubility of which with respect to a developer solution is changed by the action of the acid. The present invention employs the resist composition containing a compound (D0) that is represented by general formula (d0). In the formula, Rar represents an aromatic ring which may have a substituent. R01 represents a chain saturated hydrocarbon group having 1 to 10 carbon atoms. R02 represents a hydrogen atom or an optionally substituted chain saturated hydrocarbon group having 1 to 10 carbon atoms. R03 represents a halogen atom. j represents an integer of 1 or more, valence permitting. k represents an integer of 1 or more, valence permitting. Yd0 represents a divalent linking group or a single bond. m represents an integer of 1 or more, and Mm+ represents an organic cation having a valence of m.

To provide a resist composition or the like that is superior in all of sensitivity, roughness, and resolution.SOLUTION: The present invention provides a resist composition that generates an acid upon exposure and that changes solubility in a developer solution due to the action of the acid, the resist composition comprising a compound containing a cation (C0) represented by general formula (c0). [In the formula, Y0 represents a polar group containing an oxygen atom. Rf0 represents a fluorine atom or a fluorinated alkyl group. R01 represents a substituent (excluding a polar group containing an oxygen atom, a fluorine atom, and a fluorinated alkyl group), and R02 and R03 each independently represent a substituent (excluding an iodine atom)].SELECTED DRAWING: None

The invention relates to a nanofiltration membrane concentration and separation method for ionic rare earth leachate, and belongs to the technical field of membrane separation. In the membrane concentration process of the rare earth leachate, in order to solve the problem of membrane pollution caused by calcium sulfate scaling, the invention provides a novel process for membrane concentration under the low pH condition: under the low pH condition, the solubility of calcium sulfate is increased, and the concentration multiple is favorably increased; (2) under the condition of low pH, the electropositivity of the surface of the membrane is increased, so that the interception of rare earth ions is improved; by researching permeation selectivity of different membrane materials and combining a Hermia model, influences of different membrane process parameters and feed liquid characteristics on calcium sulfate scaling are analyzed, and finally an optimal membrane concentration process is formed.

The invention provides a single-component cleaning agent composition and a preparation method and application thereof.The single-component cleaning agent composition is prepared from, by weight, 0.5-10 parts of inorganic alkali, 0.5-8 parts of alkali-soluble wetting agent, 0.1-1 part of polymeric dispersant, 1-5 parts of oxidizing agent, 1-6 parts of pH buffering agent and 80-100 parts of water; in a liquid phase environment with a pH value of 10-12 and a temperature of 25 + / -2 DEG C, the solubility of the alkali-soluble wetting agent is 400-1000 g / L. The formula of the single-component cleaning agent is finely designed, and through reasonable combination and proportion control of multiple components, the obtained single-component cleaning agent composition can provide an efficient cleaning effect for silicon wafers under the conditions of stable pH value and temperature.

The invention discloses a method for synthesizing 1, 2-bis (4-vinylphenyl) ethane, which comprises the following steps: S1, under the protection of nitrogen, taking 4-vinylbenzyl chloride as a solvent and a reactant, and reacting in the presence of iodine, magnesium metal and ethylene glycol diethyl ether to generate the 1, 2-bis (4-vinylphenyl) ethane; s2, after the reaction is finished, heating, and filtering to remove magnesium chloride while the solution is hot; and S3, cooling and crystallizing to separate out the product 1, 2-bis (4-vinyl phenyl) ethane, and filtering and separating the product to obtain mother liquor which can be directly used for synthesizing the 1, 2-bis (4-vinyl phenyl) ethane. The method has the beneficial effects that the solubility of the product 1, 2-bis (4-vinylphenyl) ethane in 4-vinylbenzyl chloride can be effectively adjusted by introducing the additive ethylene glycol diethyl ether (EGDE), magnesium chloride can be removed by directly heating and filtering while the solution is hot after the reaction, then the product can be obtained by cooling and crystallizing the mother liquor, the process of the method is shorter than that of the existing method, a washing step is omitted, and the method is suitable for industrial production. And subsequent magnesium sulfate mother liquor drying and harsh solvent dehydration steps are avoided.

Provided is a novel means for delivering an active ingredient into the skin. An external preparation composition for the skin, which is characterized by containing composite microneedle-like crystals in which a polymer active ingredient is included in crystals of a biosoluble substance; a method for producing a taurine composite microneedle-like crystal in which a polymer active ingredient is encapsulated in a crystal, the method being characterized by comprising a step for inducing crystal growth in an environment in which an aqueous solution (A) in which taurine, which is a biosoluble substance, is dissolved in water, and a liquid substance (B) having a low solubility in taurine are mixed or brought into contact with each other, by dissolving or dispersing a polymer active ingredient in the aqueous solution (A) or the liquid substance (B), the polymer active ingredient is enclosed in the crystal along with the growth of the crystal.

The invention relates to the technical field of crude oil extraction, in particular to a composition for improving the solubility of carbon dioxide in thickened oil and a preparation method and application thereof. The composition comprises a silicon-containing amine compound as shown in a formula (I) and a polyether compound as shown in a formula (II), in the # imgabs0 # formula (I), R1 and R2 are respectively and independently selected from alkyl of C1 to C20 and alkyl siloxy of C1 to C20; r3 is selected from hydrogen, alkyl with 1 to 20 carbon atoms and alkyl siloxy with 1 to 20 carbon atoms; R4 is alkylene with 3 to 10 carbon atoms; r5 and R6 are respectively and independently selected from hydrogen, C1-C24 alkyl or O = CR0, and R0 is selected from hydrogen and C1-C31 alkyl; in the formula (II), R7 is selected from alkyl of C1 to C20 and alkyl siloxy of C1 to C20; r8, R8'and R8 ''are respectively and independently selected from hydrogen or C1-C10 alkyl, a, b and c are the number of polyether fragments, a is equal to 1-50, b is equal to 1-50, c is equal to 1-50, R9 is selected from hydrogen and C1-C24 alkyl or O is equal to CR0', and R0 'is selected from hydrogen and C1-C31 alkyl. The composition can improve the efficiency of carbon dioxide cold recovery of heavy oil.

The present invention relates to aqueous polymer dispersions, which are obtainable by free radical aqueous emulsion polymerization of ethy lenically unsaturated monomers M comprising a) 0.5 to 5.0% by weight, based on the total weight of monomers M, of a combination of a1) at least one monomer Ma1, selected from hydroxy alkyl C2-C6 (meth)acrylates; a2) at least one monomer Ma2, selected from monoethylenically unsaturated monosulfonic acids having 2 to 10 carbon atoms and the salts thereof; b1) 50 to 75,45% by weight, based on the total weight of monomers M, of at least one monomer Mb1, which is selected from nonionic monoethylenically unsaturated monomers having a solubility in deionized water of at most 60 g / L at 25°C and 1 bar, and whose homopolymers have a glass transition temperature Tg of at least 50°C; b2) 24 to 49,45% by weight, based on the total weight of monomers M, of at least one monomer Mb2, which is selected from nonionic monoethylenically unsaturated monomers having a solubility in deionized water of at most 60 g / L at 25°C and 1 bar, and whose homopolymers have a glass transition temperature Tg of at most 40°C; c) optionally, 0.05 to 2.0% by weight of at least one crosslinking monomer Me; whereby the aqueous polymer dispersion is substantially free of monoethylenically unsaturated carboxylic acids, and whereby the aqueous emulsion polymerization is carried out optionally in the presence of a chain transfer compound.

The invention relates to the technical field of silver powder synthesis, in particular to a green synthesis process of high-purity silver powder. The silver powder synthesized by the process overcomes the problems of low purity and poor dispersity of the silver powder, and the synthesis process is green. By means of the characteristic that silver ions and carbonate ions generate low-solubility silver carbonate precipitates in the precipitation treatment stage in S1 and in combination with reduction treatment in S2, preliminary purification and further impurity removal are conducted under specific reaction conditions, interference of impurity metal ions is effectively inhibited, and the purity of the silver powder is improved; on the aspect of optimizing the comprehensive performance of the silver powder, a reverse micelle structure is constructed by utilizing various substances in the S2 reduction process, and the growth of silver nanoparticles is regulated and controlled; adjusting the dosage of related substances, illumination and reduction time; controlling synthesis parameters of the tea saponin fatty acid ester; and key parameters are adjusted in the S3 calcination stage, and finally the silver powder is good in specific surface area, average particle size and stability and has good dispersity and pore diameter structure.

The application provides a method for synchronously separating active substances of Haematococcus pluvialis, and relates to the technical field of natural product extraction, and comprises an extraction phase with a mass ratio of 20%-50%, and the balance is water; the extraction phase is a quaternary phosphonium ionic liquid or a eutectic solvent; the quaternary phosphonium ionic liquid comprises tetrabutylphosphonium trifluoroacetate or tributyl octyl phosphonium bromide; and the eutectic solvent comprises a quaternary phosphonium ionic liquid and a fatty acid with a molar ratio of 1:1-5:3. The extraction phase has weak acidity, the ability to form van der Waals forces and hydrogen bond interactions, the Haematococcus pluvialis cell wall breaking effect and high solubility. The extraction phase can form liquid-liquid phase separation, can realize the synchronous extraction of Haematococcus pluvialis cell wall breaking, astaxanthin, carbohydrates and proteins, and has no organic solvent, is simple to operate, has short extraction time and high extraction efficiency. The method solves the technical problem that the extraction agent in the prior art cannot effectively separate multiple active substances of Haematococcus pluvialis.

The present invention relates to a composition of aliphatic emulsion preparation for malignant thoracicoabdominal hydrops and its preparation method. It is made up by adopting pure natural anticancer medicine elemene and at least one polysaccharide selected from ginseng polysaccharide, astragalus polysaccharide, acanthopanax polysaccharide and lyceum polysaccharide as raw material. Said invention can obviously raise solubility of medicine, increase stability of medicine, effectively remove and kill cancer cells and raise immunity of body.

The invention relates to the technical field of analytical chemistry, in particular to a high performance liquid chromatography detection method of a ridecevir intermediate GS-441524, which comprises the following steps: preparing a sample: taking a GS-441524 test sample, dissolving and diluting with a mixed solution composed of dimethyl sulfoxide and a phosphoric acid solution to prepare a test sample solution; the volume fraction of phosphoric acid in the phosphoric acid solution is 0.05-0.1%, and the volume ratio of dimethyl sulfoxide to the phosphoric acid solution is (30: 70)-(60: 40). According to the application, the ridecevir intermediate GS-441524 is dissolved and diluted through the mixed solution composed of the dimethyl sulfoxide and the phosphoric acid solution, and due to the high solubility of the dimethyl sulfoxide to the ridecevir intermediate GS-441524 and the high boiling point of the dimethyl sulfoxide, the ridecevir intermediate GS-441524 with relatively high concentration can also be subjected to high performance liquid chromatography.

Provided is a resist composition which generates an acid upon exposure, and the solubility of which in a developer solution is changed by the action of the acid. The resist composition contains a resin component (A1) the solubility of which in a developer solution is changed by the action of an acid. The resin component (A1) has a structural unit (a01) that is represented by formula (a01) and a structural unit (a02) that is represented by formula (a02). In formula (a01) and formula (a02), R represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or a halogenated alkyl group having 1 to 5 carbon atoms, Ar0 represents an aromatic hydrocarbon group, Ar01 represents an aromatic hydrocarbon group, m0 represents an integer of 1 or more, Y02 represents a single bond or a divalent linking group, Rf02 represents a divalent linking group that contains a fluorine atom, m represents an integer of 1 or more; and Mm+ represents an m-valent cation.