108 results about "Diethyl ether" patented technology

The invention discloses application of a carbon steel corrosion inhibitor based on combination of physical adsorption, chemical adsorption and hydrophobic barrier, and relates to the technical field of metal corrosion inhibition. The technical problem that a corrosion inhibitor in the prior art is low in corrosion inhibition efficiency in a high-temperature strong-acid environment is solved. The preparation method of the carbon steel corrosion inhibitor comprises the following steps: firstly, ultrasonically dissolving 4-aminopyridine to obtain a solution I; then, dropwise adding an isopropanol solution of 2, 3-epoxypropyltrimethylammonium chloride into the solution I according to a molar ratio of 1: 1, removing a solvent through a rotary evaporation method, washing with ethanol, centrifuging to obtain quaternized 4-aminopyridine, and drying the quaternized 4-aminopyridine; and finally, the dried quaternized 4-aminopyridine and bromododecane are added into acetonitrile for a reaction, diethyl ether is dropwise added into obtained reaction liquid for precipitation, and the quaternized 4-aminopyridine-bromododecane carbon steel corrosion inhibitor is obtained after drying. The prepared carbon steel corrosion inhibitor is high in corrosion inhibition efficiency in a high-temperature and strong-acid environment.

The invention relates to the technical field of pharmaceutical analysis, in particular to a thin-layer chromatography identification method of vitality-preserving decoction and a preparation thereof. Comprising the following steps: S1, extracting a sample to be detected by using diethyl ether, and preparing a test solution; s2, preparing a cinnamaldehyde reference substance solution and a 6-gingerol reference substance solution; the method further comprises at least one of the steps S3 and S4; s3, dripping the test solution and the cinnamaldehyde reference solution on the same thin-layer plate, developing with a first developing solvent, and identifying the cinnamon; the first developing solvent comprises petroleum ether and ethyl acetate in a volume ratio of (15-20): 3; s4, dripping the test solution and the 6-gingerol reference substance solution on the same thin-layer plate, developing with a second developing solvent, and identifying the ginger; the second developing solvent is prepared from petroleum ether, trichloromethane and ethyl acetate according to the volume ratio of (2-4): (1-2): (1-3). The method is good in overall separation effect, clear in spots, good in specificity and durability, and capable of identifying the medicine flavors of cinnamon and ginger in the vitality-preserving decoction and the preparation thereof.

The invention discloses a phototherapy reagent and a preparation method and application thereof. The preparation method comprises the following steps: 1-[4-(diethylamino) phenyl]-ethane-1-ketone and 4-methoxybenzaldehyde are subjected to a condensation reaction in a NaOH ethanol solution, and a product and nitromethane are subjected to addition; performing condensation and addition on the other groups of raw materials by the same method; cyclizing the two addition products with ammonium acetate, and coordinating with boron trifluoride diethyl etherate to obtain NHM; carrying out substitution reaction on the NHM and sodium nitrite to obtain NOO; and oxidizing NOO by m-chloroperoxybenzoic acid to obtain NNOO. The reagent can target a tumor hypoxia microenvironment, hypoxia monitoring is achieved, NO is released through photostimulation for tumor gas therapy, meanwhile, the secondary amplification photo-thermal therapy effect is achieved, preparation is controllable, diagnosis and treatment are integrated, and the reagent is sensitive, safe and suitable for biomedical research and clinical diagnosis.

The invention discloses a method for measuring the purity of lithium hydroxide based on a gravimetric method, which comprises the following steps: weighing a lithium hydroxide sample, mixing with an organic reagent 1 in batches, and heating to obtain a primary reactant; fully mixing the primary reactant with an organic reagent 2, filtering, collecting filtrate, diluting, adjusting the pH value to 6-6.5, and adding diethyl ether for extraction to obtain a lower-layer lithium chloride solution; adding a precipitant into the solution, reacting under a constant-temperature water bath condition, filtering and drying the obtained filter residue to constant weight, and calculating the purity of the lithium hydroxide according to the constant weight. According to the method, carbonate interference is avoided through the selective organic reagent, the content of the lithium hydroxide is directly measured through the gravimetric method, the detection process is simplified, dependence on operators and large equipment is reduced, the method has the advantages of being high in accuracy, good in repeatability, wide in application range and low in detection cost, and rapid and accurate measurement of the purity of the lithium hydroxide can be achieved.

The present application relates to an electrolyte composition for a lithium secondary battery and a lithium secondary battery comprising the same, the electrolyte composition comprising a lithium salt and an organic solvent. The organic solvent includes a first ether solvent (R-O-R ') having a fluorinated alkyl group, and a second ether solvent. The first ether solvent may be 5-ethoxy-1, 1, 2, 2, 3, 3, 4, 4-octafluoropentane, 1, 1, 2, 2, 3, 3, 4, 4-octafluoro-5-methoxypentane, or a mixture thereof, and the second ether solvent may be selected from the group consisting of dimethoxyethane, diethyl ether, and similar ethers. The lithium salt includes a compound such as LiTFSI, LiFSI, or LiPF6. The first ether solvent accounts for 30% to 90% by volume of the electrolyte, wherein the concentration of the lithium salt ranges from 0.1 M to 3.0 M. The electrolyte composition enhances battery stability and makes it suitable for use in lithium secondary batteries and lithium metal secondary batteries.

The application discloses a method for preparing submicron and micron alkylated graphene oxide by using coal, and comprises the following steps: 1, graphitizing coal powder to rearrange carbon atoms and grow submicron crystal regions; 2, oxidizing and peeling the graphitized coal under the action of sulfuric acid, phosphoric acid and potassium permanganate; 3, adding hydrogen peroxide to react with potassium permanganate and high-valence manganese salt in the solution until the solution turns yellow; 4, screening the solution to remove unreacted black impurities; 5, centrifuging the solution to reserve the precipitate, and then washing and centrifuging the precipitate with dilute hydrochloric acid and ethanol; 6, dispersing the precipitate with diethyl ether, and then obtaining graphene oxide powder through suction filtration. The prepared graphene oxide has an average size of 800 nm, an average layer number of 1-2 layers, and a yield of 107%. The method has simple steps, low cost and high yield, and is easy to realize industrial production, and has a very broad prospect in the present situation of urgently realizing high-value utilization of coal.

The invention discloses an alpha-aminophosphoryl derivative as well as a preparation method and application thereof. The method comprises the following steps: by taking a quinoline derivative as a raw material and tetrahydrofuran (THF) as a solvent, adding boron trifluoride diethyl etherate in a nitrogen system at the reaction temperature of 0 DEG C, stirring for 15 minutes, reducing the temperature of the reaction system to T1 (-60 DEG C to-30 DEG C), adding a Grignard reagent into the reaction system, and reacting for 30 minutes to obtain a solution A; dissolving a phosphorus reagent in the organic solvent at room temperature in a nitrogen atmosphere to obtain a solution B; and adding the solution A into the solution B, reacting for 6-15 hours at the reaction temperature T2 (0-50 DEG C), and after the reaction is finished, extracting, concentrating and carrying out column chromatography to obtain the target product alpha-aminophosphoryl derivative. The invention provides a novel synthetic route for preparing the alpha-aminophosphonyl derivative, and various phosphorus reagents such as diaryl phosphorus oxide and phosphite ester can be compatible with the reaction. The alpha-aminophosphoryl derivative synthesized by the invention has a good antibacterial effect on gram-positive bacteria, especially staphylococcus aureus.

The invention belongs to the technical field of caulking agents, and particularly relates to a polyurethane caulking agent and a preparation method thereof.The polyurethane caulking agent is prepared from, by mass, 35%-40% of siloxane modified dendritic polyether tetrahydric alcohol, 35%-40% of diphenylmethane diisocyanate, 5%-10% of plasticizer chlorinated paraffin, 3%-4% of 2-phenyl-5-trifluoromethyl-1, 3-oxazolidine latent curing agent, 1%-2% of foam stabilizer and 1%-2% of catalyst 2. 0.5-0.8% of 2, 2 '-dimorpholinyl diethyl ether, 5-8% of dimethyl ether and 5-8% of propane and butane. According to the polyurethane joint mixture, the 2-phenyl-5-trifluoromethyl-1, 3-oxazolidine latent curing agent is added, in the curing process, the latent curing agent reacts with water in advance of the diphenylmethane diisocyanate to form an amine substance, amido in the amine substance reacts with the diphenylmethane diisocyanate to generate a macromolecular polymer, curing of the polyurethane joint mixture is achieved, and the polyurethane joint mixture has the advantages that the curing effect is good; the curing time can be shortened, and the construction speed is increased.

The invention provides a pharmaceutical composition for treating inflammatory skin diseases, and particularly relates to an O / W cream containing trifarotene. The pharmaceutical composition provided by the invention has proper viscosity and elasticity, and the trifarotene composition preferably contains diethylene glycol monoethyl ether. The pharmaceutical composition can be directly applied to skin.

The invention discloses a low-stress perovskite thin film, a preparation method thereof and application of the low-stress perovskite thin film in a solar cell. The method comprises the following steps: (1) dissolving SBMA, HEA, an initiator and raw materials for preparing a Cs0. 05FA0. 95PbI3 perovskite precursor solution in a solvent to form the perovskite precursor solution; and (2) spin-coating the perovskite precursor solution on a substrate, dropwise adding an anti-solvent diethyl ether on the substrate before spin-coating is finished, and performing annealing treatment to form the low-stress perovskite thin film. Two monomers and an initiator are added into a perovskite precursor solution, and the two monomers are subjected to in-situ copolymerization during annealing, so that large-size grains and better crystallization orientation are formed. In addition, the polymer formed by copolymerization has relatively low Tg, so that the polymer is in a soft elastic state in the annealing process of the perovskite thin film, and the stress in the perovskite thin film can be effectively released. Therefore, the performance and the stability of the perovskite solar cell are effectively improved.

The utility model discloses a resin sand production device convenient to operate, which comprises two groups of support frames, the inner walls of the support frames are rotatably connected with a drying cylinder, and the drying cylinder comprises an outer cylinder and an inner cylinder; the ceramic cylinder is located between the outer cylinder and the inner cylinder, the inner wall of the ceramic cylinder is filled with heat conduction liquid, the supporting frame and the base are used in cooperation and used for supporting and rotating the outer cylinder, and the inner cylinder is used for containing resin sand. And the heat conduction liquid is diethyl ether, damage to the resin sand caused by too high temperature can be avoided, the resin sand is heated and dried, and meanwhile the resin sand can be prevented from being melted in advance.

The invention discloses a plant extract composition. The plant extract composition is prepared by mixing a paullinia cupana fruit extract and lycium barbarum polysaccharide according to a mass ratio of 1:(1-5). A preparation method of the paullinia cupana fruit extract comprises the following steps: (1) paullinia cupana fruits are dried and crushed, an ionic liquid ethanol solution is added, aftersealed infiltration is conducted for 1-2 h, a 30-50 V / V% ethanol solution is added, heating is conducted to achieve the reflux temperature, reflux extraction is conducted for 1-2 hours, filtering isconducted, filtrate is collected, and concentrating is conducted to obtain a crude extract; and (2) the crude extract is diluted with a proper amount of water, hydrochloric acid is added to adjust a pH value to 2.0-5.0, extracting with diethyl ether is conducted for 2-3 times, organic phases are combined, concentrating under reduced pressure is conducted, and drying is conducted. Compared with theprior art, a smaller amount of paullinia cupana fruits is adopted, so that the production cost is reduced, and the technical effect of better inhibiting tyrosinase activity is further achieved.

This invention discloses a pharmaceutical composition, a topical formulation, a method for producing the same, and its use. The pharmaceutical composition of this invention comprises the drug-active ingredient, diethylene glycol monoethyl ether, and polyethylene glycol 400, wherein the pharmaceutical composition does not contain water, and the mass ratio of diethylene glycol monoethyl ether to polyethylene glycol 400 is 1:(0.5~4.0), and the drug-active ingredient has structural formula (I). Topical formulations produced from the pharmaceutical composition provided by this invention have stable properties and do not crystallize, have a good feel, promote rapid penetration of the drug into the stratum corneum, have excellent epidermal and dermal retention ability, deliver the drug to the target on the skin, reduce systemic side effects, can achieve high local concentrations, have excellent therapeutic effects and stability, and can reduce safety risks. JPEG2026518290000036.jpg65142

The invention provides a nitrogen-defect g-C3N4 / CsCu2I3 composite material as well as a preparation method and application thereof, and belongs to the technical field of preparation of nano heterogeneous materials. A preparation method of a nitrogen-defect g-C3N4 / CsCu2I3 composite material comprises the following steps: dissolving cesium iodide and cuprous iodide in anhydrous acetonitrile, and carrying out a stirring reaction at 50-70 DEG C for 4-6 h to obtain a CsCu2I3 precursor solution; adding g-C3N4 into the CsCu2I3 precursor solution, and reacting for 10-14 hours at the temperature of 50-70 DEG C to obtain a crystallization solution; and dropwise adding diethyl ether into the crystallization solution, carrying out anti-solvent crystallization, aging, washing and drying to obtain the nitrogen-defect g-C3N4 / CsCu2I3 composite material. The nitrogen-containing defect rod-like g-C3N4 / CsCu2I3 binary nano heterojunction with good gas sensitive performance is prepared by the method disclosed by the invention.

The invention provides a method for identifying and detecting a phlegm stasis and arthralgia dredging prescription. The method comprises three modules of construction of a characteristic chromatogram of a medicinal material and optional thin-layer chromatography identification and effective component content determination. The construction of the characteristic spectrum adopts a diethyl ether-ethyl acetate two-stage segmented extraction UPLC analysis strategy, so that the interference of complex components is overcome, and the overall chemical characteristics of the compound can be comprehensively represented; thin-layer chromatography identification provides a specific identification method for medicines such as coptis chinensis, curcuma wenyujin and vinegar-processed rhizoma corydalis; and the content determination adopts a high performance liquid chromatography to detect the effective components chlorogenic acid, salvianolic acid B, glycyrrhizic acid and berberine hydrochloride. According to the invention, a multi-dimensional and configurable quality control system is constructed, the comprehensive quality control of the phlegm stasis and arthralgia dredging prescription from qualitative and overall characterization to quantitative analysis is realized, the specificity is strong, and the result is reliable.

The invention relates to the technical field of energy storage, in particular to a gel electrolyte, and an electrochemical device and electronic equipment comprising the same, and the gel electrolyte is obtained by gelation reaction of a precursor solution comprising 1, 3-dioxolane, boron trifluoride diethyl etherate, lithium perchlorate and fluoroethylene carbonate. The gel electrolyte provided by the invention can realize a 5.4 V electrochemical stable window, and has high ionic conductivity and excellent cycle performance.

This invention relates to an alkyl sulfonyl fluoride resin, its preparation method, and its applications. The structural formula of the alkyl sulfonyl fluoride resin is shown below: where n1 is 1~10000; n2 = 0~2. The preparation method includes: mixing compound 1 as shown in Formula I with a nitrite reagent and boron trifluoride diethyl ether and performing a diazotization reaction to obtain compound 2 as shown in Formula II; and then performing a fluorination reaction of compound 2 with a sulfur source, a fluorine source or a fluorosulfonylating reagent and an acid under the action of a catalyst to obtain the resin. Compared with the prior art, the preparation method of this invention is simple, the raw materials are readily available, and the prepared sulfonyl fluoride resin has high reactivity and good stability, and can be used as a high-efficiency matrix resin for the preparation of novel functional resins.

The application discloses corn-highland straw wood vinegar and a preparation method and application thereof, and belongs to the technical field of pesticide synergists, and the preparation method comprises the following steps: (1) corn straw and highland straw are mixed, crushed, dried, preheated and cracked, and then subjected to solid decomposition at a temperature of 300-600 DEG C to obtain a crude wood vinegar; (2) the crude wood vinegar is repeatedly stored by freezing and thawing for 6 months, then filtered and distilled, the light components are reserved, and the heavy components are removed; (3) the light components are extracted by butyl triphosphate and diethyl ether in sequence, then the extract is subjected to molecular distillation to evaporate the solvent, and the wood vinegar is obtained. The application further discloses the wood vinegar prepared by the preparation method and application of the wood vinegar in a pesticide synergist. The wood vinegar obtained by the application mainly plays a stomach poison, contact killing and avoidance role on the target, and can provide a further idea for developing a low-toxicity and environment-friendly plant source compound pesticide.

The invention relates to the technical field of prevention and control of soil termites, in particular to a soil termite attractant as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) taking camphor tree barks and / or eucalyptus barks as raw materials, and extracting by adopting a mixed solvent containing ethanol, diethyl ether, ethanone, water and normal hexane; and (2) filtering the leach liquor obtained in the step (1), and drying the filtrate to obtain the traditional Chinese medicine composition. The attractant for the soil-dwelling termites is added into common bait for the soil-dwelling termites, so that the common bait can attract the soil-dwelling termites for feeding in a long distance, the appetite of the soil-dwelling termites can be increased, the feeding amount of the soil-dwelling termites in unit time can be increased, and the purpose of accurately and quickly monitoring the soil-dwelling termites or killing the soil-dwelling termites is achieved.

The invention discloses a weather-resistant flame-retardant single-component perfluoropolyether waterproof coating and a gradient catalytic preparation method thereof, and the coating is mainly prepared from the following components in parts by weight: 20-30 parts of perfluoropolyether diol with the molecular weight of 4000, 5-10 parts of perfluoropolyether diol with the molecular weight of 2000, 5-7 parts of isophorone diisocyanate and 25-35 parts of piperazine pyrophosphate. The coating comprises the following components in parts by weight: 20-30 parts of epoxy resin, 3-6 parts of melamine phosphate, 0.3-1.0 part of secondary amino silane, 0.1-0.2 part of an organic bismuth catalyst and 0.03-0.08 part of dimorpholine diethyl ether. The weather-resistant flame-retardant single-component perfluoropolyether waterproof coating disclosed by the invention has the advantages of excellent storage stability, outstanding mechanical properties, excellent weather resistance, up-to-standard flame retardance, high curing efficiency and good self-cleaning performance, and is particularly suitable for exposed waterproof projects of high-standard buildings.

The invention discloses a method and a device for separating carbazole compounds in light hydrocarbon oil, and belongs to the technical field of separation and purification. The separation method of the carbazole compounds in the light hydrocarbon oil comprises the following steps: mixing the light hydrocarbon oil with normal hexane, and then centrifuging to obtain top layer filtrate; transferring the filtrate into a chromatography device filled with activated neutral aluminum oxide, and then eluting saturated hydrocarbon fractions in the light hydrocarbon oil by using an n-hexane reagent; analyzing non-hydrocarbon fractions in the light hydrocarbon oil by using a mixed reagent of diethyl ether and dichloromethane; and eluting the carbazole compounds in the light hydrocarbon oil by using a mixed reagent of diethyl ether and dichloromethane. In addition, the invention further provides a separation device for the carbazole compounds in the light hydrocarbon oil, and the separation device comprises a storage rack, a beaker, a Pasteur pipette, a polytetrafluoroethylene tube and a funnel. The method provided by the invention is higher in experimental efficiency of separating and enriching carbazole compounds and better in separation effect.

The invention discloses a near-infrared two-region imaging material and a preparation method and application thereof, and belongs to the technical field of photoelectric functional materials. The near-infrared two-region imaging material is an aza-fluorine boron pyrrole derivative NJ1040; the preparation method comprises the following steps: dissolving 2-acetylthiophene in ethanol to obtain a mixed solution, adding a potassium hydroxide aqueous solution, stirring, adding 4-diethylaminobenzaldehyde, stirring, and extracting; drying the extracted organic phase, and performing rotary evaporation concentration and purification to obtain an intermediate I; mixing the intermediate I, diethylamine and nitromethane, reacting, extracting, drying the extracted organic phase, and performing rotary evaporation concentration and purification to obtain an intermediate II; mixing the intermediate II, ammonium acetate and ethanol for reaction, adding triethylamine and a boron trifluoride diethyl etherate complex for continuous reaction after rotary evaporation concentration, and extracting; and drying the extracted organic phase, carrying out rotary evaporation concentration, and purifying to obtain the product. NJ1040 nanoparticles are prepared by a nano coating technology, so that the problem of poor solubility of a contrast agent is solved.

The invention provides a preparation method of an adhesive for an excrement storage bag capable of being smeared, and belongs to the field of preparation of adhesives for excrement storage bags. The method comprises the following steps: dissolving a mixture A in anhydrous dichloromethane, carrying out a stirring reaction under the protection of inert gas, and sequentially carrying out hydrochloric acid washing, saturated saline solution washing, rotary evaporation concentration and diethyl ether precipitation to obtain two-arm polyethylene glycol allyl succinate; wherein the mixture A is prepared from the following components in parts by weight: 20 to 40 parts of two-arm type polyethylene glycol, 1 to 2 parts of allyl succinic anhydride and 1 to 2 parts of dimethylaminopyridine. The prepared adhesive can be smeared on the surface of any uneven skin around the stoma, and the adhesive can generate viscosity through ultraviolet irradiation, so that an excrement storage bag is tightly adhered to the skin, excrement leakage is prevented, and tissues around the stoma are protected. And the adhesive can be easily eluted by using medical alcohol, so that the excrement storage bag is convenient to replace. The used materials are simple and easy to obtain, the operation is simple, the price is low, and good news is brought to vast stoma patients.

The invention relates to the technical field of luminescent material synthesis. The invention provides a Te-based hybrid halide luminescent material and a preparation method thereof. The luminescent material is of a zero-dimensional organic-inorganic hybrid crystal structure and comprises [TeCl6] < 2-> anions and organic phosphonium cations (C25H21PCl) < + > containing polar substituent groups. The preparation method comprises the following steps: dissolving tellurium dioxide in hydrochloric acid; continuously adding (2-chlorobenzyl) triphenyl phosphonium chloride, and reacting to generate a precipitate; centrifugally separating the precipitate, and drying under a vacuum condition to obtain intermediate powder; dissolving the powder in acetonitrile; and putting the solution into a sample bottle, putting the sample bottle into a sealed container containing diethyl ether, and carrying out solvent diffusion crystallization to obtain the luminescent material. According to the luminescent material, energy coupling and non-radiation loss between luminescent units are reduced, excitation energy can be more sufficiently converted into radiation luminescence, the luminous efficiency is improved, the luminescent material can be better matched with a blue light wave band, and the luminescent material is suitable for application scenes such as high-brightness solid-state illumination and photoelectric display.

The application provides a preparation method of furanone, comprising the following steps: S1, using diethyl ether and 1,2-ethylene glycol as raw materials, a Lewis acid as a catalyst, and a peroxide as an initiator, and reacting to obtain 2,5-dimethyl-3,4-diol tetrahydrofuran; S2, dehydrogenating and oxidizing the 2,5-dimethyl-3,4-diol tetrahydrofuran to obtain furanone. The preparation method of furanone can effectively solve the problems of long process flow, difficult-to-obtain raw materials, complex operation, many by-products, and low product yield in the synthesis process of furanone.

The invention discloses a weather-resistant polyurethane acrylate copolymer hot melt adhesive and a preparation method thereof. The invention relates to a water-based polyurethane adhesive, which is prepared from the following raw materials in parts by weight: 15 to 61 parts of hydroxypropyl methacrylate, 20 to 81 parts of pentaerythritol diacrylate, 5 to 20 parts of polypropylene glycol 1000, 5 to 20 parts of polypropylene glycol 4000, 25 to 100 parts of diphenylmethane diisocyanate, 0.025 to 0.1 part of dimorpholinyl diethyl ether, 3.5 to 14 parts of first filler and 8 to 32 parts of second filler. Polyacrylate is added into polyurethane for modification, so that the weather resistance, the water resistance and the bonding strength of the hot melt adhesive can be effectively improved; by adding the first filler and the second filler, the respective reinforcing effects can be exerted, and the problems that the initial peel strength is reduced and the curing rate is reduced when the polyacrylate is added into the polyurethane hot melt adhesive can also be solved.

This invention relates to the field of chemical process treatment technology, and discloses a method and system for treating organic wastewater from ethanol dehydration to ethylene production. The invention first hydrogenates a mixed solution containing ethanol, diethyl ether, and acetaldehyde, converting acetaldehyde in the mixed solution into ethanol, effectively avoiding the impact of acetaldehyde accumulation on the dehydration catalyst. Then, the overhead gas from the stripping tower is collected to recover ethanol and diethyl ether from the aqueous phase, with recovery rates reaching over 99 wt%. This invention employs a "hydrogenation reaction + stripping" technology, effectively recovering and reusing ethanol and diethyl ether from the aqueous phase. It solves the problems of difficulty in separating the ternary azeotrope of diethyl ether, acetaldehyde, and water through distillation, acetaldehyde in the recovered product causing deactivation of the dehydration catalyst, and the high energy consumption caused by the need for condensation followed by vaporization of the recovered product.

The application discloses a non-polyrolone drop and a preparation method thereof, relates to the technical field of pharmaceutical preparations, and solves the technical problems of poor stability, obvious increase of impurities during long-term storage and the like of the existing non-polyrolone drop.The non-polyrolone drop contains the following raw material components per 1000ml: 0.1-1g of ammonium bromide, 100g of non-polyrolone, 10-12g of an antioxidant, 10-12g of a solubilizer, 100-150ml of a stabilizer, and the balance of purified water.The antioxidant is at least one of dibutyl hydroxyl toluene and p-hydroxy tertiary butyl anisole, the solubilizer is polyvidone K17, and the stabilizer is diethylene glycol monoethyl ether.The stability of the drop can be greatly improved by adding the component ammonium bromide in the non-polyrolone drop, and the quality stability of the non-polyrolone drop prepared by the application is obviously improved.

The invention belongs to the technical field of manufacturing of optoelectronic devices, and particularly relates to a stripping liquid additive for recycling waste liquid and a preparation method of the stripping liquid additive. The preparation method comprises the following steps: (1) reacting benzotriazole, concentrated hydrochloric acid and paraformaldehyde to obtain a first intermediate product; (2) mixing the first intermediate product, N, N-dimethylethylenediamine, anhydrous acetonitrile and an acid-binding agent, carrying out heating reaction under the protection of nitrogen, cooling to room temperature, and carrying out suction filtration, purification and vacuum drying to obtain a second intermediate product; and (3) mixing the second intermediate product, polyethylene glycol monomethyl ether, triphenylphosphine and anhydrous tetrahydrofuran, dropwise adding a toluene solution of diethyl azodicarboxylate, reacting, carrying out reduced pressure distillation, adding diethyl ether, separating out a solid, carrying out suction filtration, concentrating the filtrate, and carrying out purification, reduced pressure distillation and vacuum drying. The additive can improve the efficiency and effect of the stripping liquid, and is low in corrosivity.

This invention provides a continuous synthesis method for cyclopentadiene trimer, comprising the following steps: mixing dicyclopentadiene, an organic solvent, and a Lewis acid catalyst, and then feeding the mixture into a tubular reactor for reaction, followed by sequential atmospheric distillation and vacuum distillation to obtain the cyclopentadiene trimer; the organic solvent is one or more selected from cyclohexane, n-heptane, dichloromethane, benzene, toluene, xylene, ethylbenzene, propenzene, o-dichlorobenzene, ethyl acetate, isobutyl acetate, and acetonitrile; the Lewis acid catalyst is one or more selected from aluminum trichloride, ferric chloride, boron trifluoride diethyl ether, methyl aluminum dichloride, and zinc chloride. This invention, by selecting appropriate solvents and Lewis acids, enables the reaction to occur with higher selectivity and reduces side reactions. Subsequent purification by vacuum distillation can reduce the decomposition of TCPD and the formation of other byproducts during distillation.