15 results about "Mutual solubility" patented technology

Provided is a method for preparing lactide by one-step reaction of lactic acid, which comprises mixing lactic acid raw material with a solvent and contacting with a catalyst, wherein the solvent comprises solvent I and solvent II, the solvent I is at least one selected from polar solvents such as benzophenone, dihydrolevoglucosenone, N-methylpyrrolidone, trichloropropane and sulfolane, the solvent II is C4-C12 alkane, substituted alkane, aromatic hydrocarbon or substituted aromatic hydrocarbon, the solubility of the solvent II for lactic acid at normal temperature is not more than 1 g lactic acid / 100 g solvent; and the reaction temperature and pressure are such that the solvent I does not boil in the reaction system. The mixed solvent is used as the liquid environment for preparing lactide by one-step reaction of lactic acid, the mixed solvent can be completely miscible with lactic acid in the reaction raw material, on the one hand, it can increase the contact between lactic acid and the solid catalyst, make the reaction more complete, reduce the generation of by-product poly lactic acid, and increase the selectivity of lactide; on the other hand, since the poly lactic acid can also be dissolved in the selected solvent, the adhesion of the poly lactic acid on the catalyst can be reduced, the influence of catalyst deactivation caused by carbon deposition can be reduced, and the service life of the catalyst can be improved.

The application provides a liquid crystal compound and application thereof. The liquid crystal compound has a structure as shown in formula I. The liquid crystal compound has excellent characteristics such as high dielectric anisotropy, good liquid crystal mutual solubility, low rotational viscosity and the like, and can be used to improve the performance of a liquid crystal material. Formula I

This invention discloses a method for preparing potassium glycinate. The method includes adding potassium salt and glycine to water, adjusting the pH of the solution to 6.0-8.0 with an acid-binding agent, and removing a portion of the water from the reaction solution using cyclohexane as a dehydrating agent. The residue is added to a non-aqueous solvent of a certain concentration and temperature that is miscible with water to precipitate a solid. After centrifugation or filtration and drying, the finished potassium glycinate product is obtained. The potassium salt and glycine are prepared from the following molar proportions of raw materials: 1-10 parts glycine; 1-11 parts potassium salt. The preparation method of this invention operates under mild conditions, and the clever introduction of a dehydrating agent during the preparation process further shortens the drying time required for the product and improves the stability of the product.

The application provides a negative liquid crystal composition and application thereof, and belongs to the technical field of liquid crystal materials. The negative liquid crystal composition comprises at least one compound represented by a general formula I, at least one compound represented by a general formula II, at least one compound represented by a general formula III, at least one compound represented by a general formula IV and at least one compound represented by a general formula V. The negative liquid crystal composition provided by the application has low rotational viscosity, large elastic constant, small optical dispersion, good low-temperature mutual solubility, relatively high transmittance and fast response speed, can be used for fast response liquid crystal display of various display modes, improves the transmittance and contrast ratio, and is especially suitable for IPS and FFS mode liquid crystal displays.

This invention provides an apparatus and method for preparing selectively soluble microspheres, where the compound microspheres are readily soluble in a first solvent, substantially insoluble in a second solvent, and the first and second solvents are miscible. The main functional modules of the apparatus include: a real-time particle size detection module, a microsphere-liquid separation module, a concentration titration module, a centrifugal differential spheroidizing module, and a microsphere drying and separation module. This apparatus can separate the spheroidized compound and polymer materials, ensuring high sphericity of the compounds and polymer materials, preventing microsphere adhesion, and maintaining the dispersion of the compound microspheres. Simultaneously, the solvent and titration system are recycled to ensure that the particle size of the compound microspheres gradually decreases.

The application discloses an emulsion based on a water-DMF mutual solubility system and a preparation method thereof, and comprises the following steps: (a) a water phase, which comprises a water solution of noble metal nanoparticles with a concentration of 25-200 nmol / L; (b) a DMF phase, which comprises a DMF dispersion of mercapto-terminated polystyrene with a concentration of 10-100 mg / mL; wherein the volume ratio of the water phase to the DMF phase is 1:0.1-50. The application further discloses applications of the emulsion in a microreactor, a near-infrared light-controlled controllable release emulsion carrier and a noble metal-based flexible conductive ink. The application can not only break through the technical bottleneck that the mutual solubility system is difficult to emulsify, but also can endow the emulsion with optical and photothermal functional properties of noble metal nanoparticles.

A system for containing a chemical mixture including a liquid with at least two intermiscible components having different densities, and a gas. The system includes a spherical reservoir, including top and bottom sections and a bottom; a vertically positioned standpipe having a top section in fluid communication with the top section of the spherical reservoir through a connection pipe, and a bottom section including a bottom, in fluid communication with the bottom section of the spherical reservoir through a connection pipe; a conduit for supplying the gas from the chemical mixture; and first and second draining pipes in fluid connection with the bottoms of the spherical reservoir; and of the standpipe, respectively. The bottom section of the standpipe is higher than the bottom section of the spherical reservoir, and the connection pipe is a downwardly-inclined pipe from the bottom section of the standpipe to the bottom section of the spherical reservoir.

The application belongs to the technical field of novel aqueous energy storage, and discloses a locally high-concentration aqueous electrolyte and a preparation method and application thereof. The locally high-concentration aqueous electrolyte is a homogeneous phase solution formed by mixing solute, water and diluent. The solute is a soluble salt of alkali metal, and the mass of the solute is greater than that of the water. The diluent is formamide, which is miscible with water, and the binding energy of the diluent with alkali metal ions in the solute (if there are multiple alkali metal elements in the solute, the alkali metal ions are the ones with the dominant amount of substance) is higher than the binding energy of water and the alkali metal ions. The locally high-concentration electrolyte provided by the application can overcome the shortcomings of high-concentration aqueous electrolyte, such as high cost, high viscosity, sensitivity to temperature, and instability of the solid-state electrolyte interface formed.

The application discloses a multifunctional modified mutual solvent for alcohol ether fuel and a preparation method thereof, and belongs to the technical field of fuel additives. The application aims at solving the problems of poor mutual solubility, strong corrosion to metal parts, difficult low-temperature starting and poor storage stability of the existing alcohol ether fuel mutual solvent. The modified mutual solvent is composed of the following raw materials in parts by weight: mutual solubility main agent 45-65 parts, corrosion-resistant composite agent 15-25 parts, low-temperature starting composite agent 8-18 parts and synergistic stabilizer 5-12 parts. The product of the application is mutually soluble and stable in a wide temperature range of-30 DEG C to 40 DEG C, the copper sheet corrosion reaches 1 a grade, the cold starting time at-30 DEG C is less than or equal to 3.5 seconds, the performance attenuation after storage for 6 months is less than or equal to 15%, the flash point is increased by more than 10 DEG C, and the comprehensive performance is significantly better than that of the prior art.

The application discloses a production method of preparing tetrabutyl tin with single solvent, and particularly relates to the technical field of organic compound synthesis. The application solves the technical problems of large solvent loss, high energy consumption of separation, complex water removal process and low product yield in the traditional THF and toluene mixed solvent process. In the application, isopropyl ether is used as single solvent, magnesium and chlorobutane are used to generate butylmagnesium chloride in the isopropyl ether; then, tin tetrachloride is dropped into the mixture, and tetrabutyl tin and anhydrous magnesium chloride are generated by continuous stirring reaction; hydrochloric acid is added to the system to dissolve the solid precipitate, and the upper organic phase is obtained by standing and separating; finally, the isopropyl ether is recovered by normal pressure distillation, and the tetrabutyl tin is obtained by reduced pressure distillation. The application realizes efficient recovery and recycling of the solvent by using the low boiling point and water insolubility of the isopropyl ether; and the molecular sieve drying step is omitted by using the in-situ water absorption property of the by-product anhydrous magnesium chloride.

The application provides a negative liquid crystal composition and application thereof, and belongs to the technical field of liquid crystal materials. The negative liquid crystal composition comprises at least one compound represented by general formula I, at least one compound represented by general formula II and at least one compound represented by general formula III. The negative liquid crystal composition provided by the application has low rotational viscosity, large elastic constant, large optical anisotropy, good low-temperature mutual solubility and fast response speed, can effectively improve the contrast ratio of a liquid crystal display, simultaneously takes into account the response speed of the liquid crystal display, and can obviously improve the display effect of the liquid crystal display in a VA, IPS or FFS mode display.

This invention relates to the field of copper alloy technology, and more particularly to a high-temperature wear-resistant copper alloy and its preparation method. This invention utilizes the infinite mutual solubility of Cu and Ni elements. An equiatomic ratio of Ni is added to Cu to form a Cu-Ni solid solution, achieving solid solution strengthening. Then, precipitation strengthening is achieved by introducing Al elements to form a Ni3Al precipitate phase with Ni elements in situ. Combined with the strengthening effects of Ti, Cr, Si, and B elements, a copper alloy with high hardness, strength, and excellent wear resistance at high temperatures is obtained. Due to the high thermodynamic stability of the Ni3Al phase, it is not prone to phase transformation or coarsening under high-temperature conditions. Therefore, the CuNiAlX alloy is not prone to softening at high temperatures and exhibits good mechanical load-bearing capacity during high-temperature friction. Simultaneously, the CuNiAlX alloy undergoes a tribochemical reaction during high-temperature friction, forming a composite oxide layer on the wear surface, which plays a role in reducing friction and resisting wear.

The application provides an imidazole ionic liquid for trans-polybutadiene rubber mixing, a preparation method and application thereof. The imidazole ionic liquid is named as MI, and X in the chemical formula is at least one of Br, Cl, I or F. The imidazole ionic liquid for trans-polybutadiene rubber mixing is used in wet mixing and premixing of trans-polybutadiene rubber. The application innovatively designs and synthesizes an imidazole ionic liquid MI which is soluble in alkaline water, and the MI shows good solubility to TBIR. After the MI is used to dissolve the TBIR, the wet premixing system of natural latex and magnesium hydroxide with water as a solvent is added, and the green wet premixing technology for TBIR (without organic solvent) is realized.

The invention relates to a method for preparing BHET by depolymerising a plastics feedstock comprising PET and polymers other than PET, which method comprises: a) depolymerising the PET, in the presence of a diol, with a weight ratio between the amount of diol and the amount of PET contained in the feedstock between 0.3 and 8.0, the step a) comprising a reaction phase carried out at a temperature between 150 and 300°C and being carried out in a liquid reaction medium; b) dissolving the polymer other than PET, comprising mixing a solvent that is immiscible with the liquid reaction medium of step a), thus making it possible to solubilise the polymer other than PET; and b') separating the immiscible solvent resulting from step b) from the liquid reaction medium; the steps b) and b') being carried out independently during or after the depolymerisation step a), the method producing a purified effluent comprising BHET.

The present application relates to PC resin toughening agent technical field, aiming at the problem of poor mutual solubility of organic silicon material and PC resin, insufficient mechanical properties of target product, the present application specifically discloses a kind of acrylate resin-g-silicone elastomer toughening agent and preparation method and application thereof, the preparation method of the toughening agent is as follows: take hydrogen-containing silicone oil, vinyl silicone oil, third alkenyl functional component and platinum catalyst, mix uniformly, pre-emulsification is carried out under the action of surfactant and thickening agent, obtain silicone pre-emulsion;Other methyl methacrylate and other acrylate, and / or crosslinking agent are taken, mix uniformly, molecular weight regulator and oil-soluble initiator are added, pre-emulsification is carried out under the action of surfactant, obtain acrylate pre-emulsion;Take silicone pre-emulsion, heat reaction, obtain the organic silicon elastomer suspension with residual vinyl group, then drop acrylate pre-emulsion and water-soluble initiator, heat preservation reaction, demulsification, obtain acrylate resin-g-silicone elastomer toughening agent.