37 results about "Eutectic system" patented technology

The invention relates to 5-hydroxymethylfurfural, particularly a method for preparing 5-hydroxymethylfurfural from fructose. The method has the advantages of low cost, high yield, simple steps and environment friendliness. The method comprises the following steps: mixing fructose and choline chloride, adding hydrochloric acid as a catalyst, heating to react, and adding an organic extractant to extract the reaction mixture, thereby obtaining the product 5-hydroxymethylfurfural. By using the ultralow-concentration hydrochloric acid as the catalyst, the 5-hydroxymethylfurfural can be efficiently prepared in the fructose-choline chloride eutectic system, thereby being green and environment-friendly. By using the ultralow-concentration hydrochloric acid as the catalyst, the yield of the 5-hydroxymethylfurfural can reach 92%. The eutectic formed by the cheap choline chloride and fructose has favorable economical efficiency, thereby providing a novel idea for research of 5-hydroxymethylfurfural and downstream products thereof.

The invention discloses a method for preparing biodiesel in a eutectic system. The biodiesel is prepared by stirring and heating plant oil and methyl alcohol, which are used as raw materials, under normal pressure. The method has the advantages that a sodium hydroxide catalyst is adopted, so that the cost is low, the catalysis activity is high, and the using amount is small; the reaction conditions are mild, and the reaction can be executed under normal pressure and methyl alcohol backflow temperature conditions; a eutectic solvent consists of choline chloride and glycerinum, so that an emulsification phenomenon is avoided, and the technical flow is simplified; the product is high in purity and contains few impurities; the eutectic catalysis system consisting of the eutectic solvent and the sodium hydroxide is easy to recycle and use and has an environment-friendly effect.

The invention relates to a preparation method of a composite phase change energy storage material by using bentonite as a base body and using aliphatic dibasic acid as a phase change energy storage body, which belongs to the technical field of the preparing technology of energy storage materials and comprises the steps of: putting the bentonite, CTAB (cetyltriethylammnonium bromide) and deionized water into a reaction container to heat and stir; modifying the bentonite; preparing a eutectic system of aliphatic dibasic acid by using myristic acid (MA) and palmitic acid (PA), or lauric acid (LA) and myristic acid (MA); heating 20% to 37% of eutectic mixture of the aliphatic dibasic acid, 26% to 42% of modified bentonite and 36% to 44% of absolute ethyl alcohol in the reaction container to 75 DEG C; stirring for 2 hours; and drying a product in the reaction container to constant weight to obtain the aliphatic dibasic acid/bentonite composite phase change material. The material has good heat storage capability and the stability of storing heat circulation, and can be used for the fields of using waste heat, residual heat and solar energy and the like.

The invention relates to a method for preparing a cellulose nano crystal by using an acidic eutectic solvent through hydrolysis, and belongs to the field of natural polymer material preparation. The cellulose nano crystal is prepared through hydrolysis of 1 to 10 parts by mass of cellulose slurry, wherein the hydrolysis is catalyzed by an acidic eutectic system composed of 40 parts by mass of oxalic acid dihydrate, 40-50 parts by mass of choline chloride, 5-10 parts by mass of distilled water and 5-10 parts by mass of sulfuric acid, the reaction time is 1-5 hours, and the reaction temperatureis 45-55 DEG C. The reaction conditions are mild, and the operation is simple. The cellulose nano crystal is prepared in one step by utilizing an acidic eutectic solvent, and the steps of machining treatment and the like are omitted. The prepared cellulose nano crystal has good thermal stability and good dispersion stability in water.

The invention relates to a rectification-molecular sieve membrane coupling process and a rectification-molecular sieve membrane coupling device for separation of a ternary water-containing eutectic system, and discloses a novel separation device for direct coupling of a rectifying tower and a membrane component. The novel separation device comprises a tower internal component and a membrane permeation unit internal component contained in a conventional rectifying tower. For ternary water-containing system separation, a molecular sieve membrane steam permeation device and a rectifying tower areingeniously combined into a whole, separation of a ternary azeotropic system through a single rectifying tower of a simple structure is achieved, and the separation efficiency is obviously improved.

The invention belongs to the technical field of a solid dispersion, and concretely relates to a solid dispersion matrix and an application thereof. The solid dispersion matrix is an eutectic system composed of a hydrogen bond donor, a hydrogen bond acceptor, and an excipient, and the hydrogen bond donor is any one or more of glucose, mannitol, citric acid, succinic acid, and menthol; the hydrogenbond acceptor is choline chloride; and the excipient is any one or more of PEG, PVP and poloxamer. The beneficial effects of the solid dispersion matrix are as follows: firstly, the dissolution of aninsoluble drug in water is improved, and the utilization degree is greatly improved; secondly, the eutectic system is used as the solid dispersion matrix for preparing pills, water-dispersible granules or wettable powder, the process is simple, the operation is easy, the solid dispersion matrix does not use toxic and harmful organic solvents, is non-polluting, and is suitable for industrial production; and furthermore, the addition of excipient improves the storage stability of the prepared drug and is less susceptible to wetting liquefaction.

The invention provides a method of separating olefins/alkanes, comprising the steps of (1) mixing a hydrogen bond receptor and a hydrogen bond donor in a suitable ratio to prepare a eutectic solvent; (2) dissolving a cuprous salt in the eutectic solvent prepared in step (1) to prepare an active eutectic solvent containing the cuprous salt; (3) applying the active eutectic solvent containing the cuprous salt prepared in step (2) evenly to a porous organic supporting membrane, and preparing the Cu(I)/eutectic supporting liquid membrane by a pressurizing method; (4) using the eutectic supporting liquid membrane prepared in step (3) to separate olefins/alkanes. The active membrane liquid with high support concentration is acquired herein by changing the types of cations, anions and hydrogen bond donor in a eutectic system and changing the ratio of the hydrogen bond donor and hydrogen bond receptor to adjust the dissolvability of the cuprous salt therein. Unique hydrogen bond network and proton environment in the eutectic solvent are used to stabilize a support, so that long-term stability of the supporting liquid membrane is ensured.

The invention relates to salicylic acid organic medicine eutectic and a preparation method of the eutectic. The preparation method comprises the steps of taking salicylic acid as an active ingredient of a medicine, taking 4,4'-dipyridyl as an eutectic precursor, putting salicylic acid, 4,4'-dipyridyl, water, alcohol, methanol or acetone into an eutectic vessel, placing the eutectic vessel on a stirrer, performing room temperature stirring for 2h, placing the eutectic vessel in a 40-100 DEG C oven for 10-40h after stirring stop, taking the eutectic vessel out, and performing cooling to a room temperature until lumpy and flaky clear crystal is separated out. The eutectic inherits pharmacological activity of salicylic acid, and has obvious improvement in solubility, stability and bioavailability of salicylic acid.

The invention relates to a method for producing zinc based on a choline chloride-malonic acid low eutectic system. The method is characterized in that a choline chloride-malonic acid-zinc oxide original electrolyte is prepared; little ethidene diamine is added to choline chloride-malonic acid-zinc oxide ion liquid based on the fixed dose concentration of substances; zinc plates in the ion liquid can be used as soluble anodes; red copper blocks can be used as cathodes; electrodes are soaked into the ion liquid and then are connected to a power supply through copper wires, high-current-density and constant-current electrolytic deposition is carried out under constant temperature; and after the electrolytic deposition, a sample is subjected ultrasonic washing and drying. According to the method, the raw materials are simple and are not preprocessed; few additives are added; the operation is simple, easy to carry out, green, environmentally friendly, safe and nontoxic; in addition, the used current density is high; the electrolytic deposition rate is high; and zinc can be rapidly generated on a copper substrate.

The invention discloses a method for synthesizing biodiesel in a eutectic system. The biodiesel is obtained by taking vegetable oil and methanol as raw materials and performing stirring and heating at a normal pressure in the eutectic system composed of N-sulfopropyl-N,N,N-trihydroxyethyl ammonium and glycerol. The method disclosed by the invention has the following advantages: (1) a sodium hydroxide catalyst is adopted, and is low in cost, high in catalytic activity and little in dosage; (2) the reaction condition is mild to ensure that reaction can be carried out at a normal pressure and a methanol refluxing temperature; (3) a eutectic solvent in the composition eliminates emulsification and then the process flow is simplified; (4) the product is high in purity and few in impurity; and (5) a eutectic catalytic system composed of the eutectic solvent and sodium hydroxide facilitates recycling, and does not contain halide ions, thereby being safe and reliable for environment and metal equipment.

The invention relates to a preparation method for a mesoporous silica coated gold nanorod doping integral column. The preparation method comprises the following steps: leading GNRs@mSiO2 into preparation of a capillary tube integral column which takes green solvent ionic liquid and a low eutectic system as a binary pore-foaming agent, regulating proportion of GNRs@mSiO2 to choline chloride-alcohol, the type of ionic liquid and the proportion of the ionic liquid to a low eutectic solvent to observe separating ability, on small molecular substances, of the capillary tube integral column. The preparation method is easy to operate, and is easy and easy to implement. The integral column is compact in material structure, and is good in permeability; the prepared capillary tube integral column iscompact in material structure; according to the electro-chromatographic experiment for alkylbenzene analogues, the column effect (168000 boards/meter) of the GNRs@mSiO2 doped integral column is obviously higher than that (87300 boards/meter) of a blank column, indicating that the column effect of the capillary tube integral column can be effectively improved by doping GNRs@mSiO2; and an organic-inorganic hybrid integral column prepared by a gold nanorod doping scheme has a potential application prospect.

The invention relates to the technical field of chemical synthesis and particularly discloses a method for preparing 1,4-cyclohexanedione monoethylene glycol ketal. The method comprises the steps of producing an eutectic system from ammonium methyltriethylchloride and ethylene glycol, and then, directly adding 1,4-cyclohexanedione for a reaction. According to the method disclosed by the invention,produced monoketal is high in selectivity, the yield can reach 90% or more, and other reaction solvents are not required to be used, so that the production cost is reduced; after the reaction ends up, the product is easy to separate, and the operation is simple.

The invention provides a cooking utensil and a forming method thereof. The cooking utensil comprises a utensil and an anti-rust layer, and the anti-rust layer covers the surface of the utensil; and the anti-rust layer comprises a titanium-silicon eutectic system alloy, and the mass ratio of the titanium-silicon eutectic system alloy is not less than 80%. The anti-rust effect of the cooking utensil can be improved.

An oxide solid electrolyte and a preparation method thereof belong to the technical field of batteries. The oxide solid electrolyte is formed by sintering and crystallizing a lithium salt precursor and a main material, the lithium salt precursor comprises a lithium salt eutectic system which is formed by at least two lithium salts and has the eutectic temperature of 100-450 DEG C. The preparation method comprises the following steps: sintering and crystallizing a mixture formed by the lithium salt precursor and the main material at the temperature of 300-750 DEG C to obtain the oxide solid electrolyte. The preparation method can reduce the sintering temperature and is beneficial to reducing the cost.

The invention relates to a method for preparing cellulose nanocrystals by hydrolyzing cellulose with a eutectic solvent, and belongs to the field of preparation of natural polymer materials. The cellulose nanocrystal is an acidic eutectic system consisting of 40 parts by mass of citric acid, 40-50 parts by mass of betaine, 5-10 parts by mass of distilled water and 5-10 parts by mass of sulfuric acid and carrying out catalytic hydrolysis on 1-10 parts by mass of cellulose slurry, wherein the reaction time is 2-6 hours, and the reaction temperature is 50-65 DEG C; the reaction conditions are mild, and the operation is simple. The one-step preparation of the cellulose nanocrystals by using the acidic eutectic solvent is realized, the reaction efficiency of preparing the cellulose nanocrystalsby using the eutectic system is effectively improved, and the product properties of the cellulose nanocrystals are improved. The prepared cellulose nanocrystal has good thermal stability and high crystallinity, and is stable in dispersion in water.

The invention provides a cooking utensil and a forming method thereof. The cooking utensil comprises a utensil and a non-stick layer covering the surface of the utensil. The surface of the non-stick layer is of a lotus leaf structure, the non-stick layer comprises titanium particles, silicon particles and a titanium-silicon eutectic system alloy, and the mass proportion of the titanium-silicon eutectic system alloy is 60%-80%. According to the cooking utensil, use of non-stick paint can be avoided, the durability of the cooking utensil is improved, and the service life of the cooking utensil is prolonged.

The invention discloses an ethoxyl inner salt based eutectic substance. The substance is characterized by comprising organic amphipathic molecules with a positive charge and a negative charge as well as polyhydric alcohol. According to a preparation method, the two raw materials, the organic amphipathic molecules and polyhydric alcohol, are mixed in a proportion, heated and stirred, a transparent liquid is obtained, and a target product is obtained after the transparent liquid is dried. The ethoxyl inner salt based eutectic substance has the advantages as follows: chloride ions and other halide ions are not contained in the eutectic system, and the eutectic substance cannot corrode metal equipment such as stainless steel equipment and the like; the preparation process is simple, operation is convenient and the raw materials are easy to obtain; solvents are not required for a reaction medium, an atomic economy reaction is realized, the eutectic substance is suitable for industrial production, and the chemical process is environment-friendly.

The invention provides a eutectic device and a transistor packaging eutectic system. The eutectic device comprises a wafer suction structure, a to-be-eutectic product suction structure, preheating structures, eutectic heating platforms and eutectic recognition structures, the wafer suction structure is used for sucking wafers, the to-be-eutectic product suction structure is used for sucking to-be-eutectic products, the preheating structures are used for preheating the to-be-eutectic products, the eutectic heating platforms are used for heating a wafer and the to-be-eutectic products, the eutectic recognition structures are used for photographing in the eutectic process, the number of the preheating structures, the number of the eutectic heating platforms and the number of the eutectic recognition structures are all two, the two preheating structures are arranged corresponding to the two eutectic heating platforms respectively, and the two eutectic recognition structures are correspondingly arranged above the two eutectic heating platforms. According to the eutectic device, the eutectic efficiency can be improved, the structures of the two preheating structures are the same, the influence of machining and assembly tolerance of the preheating structures is greatly reduced, and the eutectic precision and the eutectic effect of the two eutectic heating platforms are basically consistent.