1099 results about "Organic base" patented technology

The invention relates to the technical field of lithium-sulfur batteries, and discloses a sulfonyl ZIF-8 metal organic framework material, a lithium-sulfur battery diaphragm and a preparation method of the lithium-sulfur battery diaphragm. The preparation method of the sulfonyl ZIF-8 metal organic framework material comprises the following steps: dissolving a metal precursor and a mixed ligand in an organic solvent, and carrying out a coordination reaction under the action of organic alkali; solid is collected, washed and dried, and the sulfonic group ZIF-8 metal organic framework material is obtained. The metal precursor is soluble zinc salt; the mixed ligand comprises 2-methylimidazole and an imidazole derivative containing a sulfonic acid group. The sulfo group ZIF-8 metal organic framework material is prepared through a ligand doping strategy and is used for functional modification of the lithium-sulfur battery diaphragm; the shuttle behavior of lithium polysulfide (LiPS) can be effectively inhibited through the electrostatic repulsion effect of sulfonic acid groups and the synergistic effect of high-polarity adsorption sites; and the migration of Li < + > and the conversion efficiency of LiPS are remarkably promoted by an efficient ion transmission network, so that the cycle performance of the lithium-sulfur battery is improved.

The invention relates to a copper-molybdenum-titanium etching solution as well as a preparation method and application thereof. The copper-molybdenum-titanium etching solution comprises a main agent, the main agent is prepared from organic acid, a fluorine-containing compound, a surfactant, organic alkali, a corrosion inhibitor, hydrogen peroxide and deionized water. The copper-molybdenum-titanium etching solution provided by the invention does not contain phosphorus, the cost and environmental protection risk in a wastewater treatment link are greatly reduced, and meanwhile, the copper-molybdenum-titanium etching solution contains low fluorine, so that the etching solution has good etching activity, corrosion to equipment is effectively reduced, a powerful guarantee is provided for stable operation of production, and the copper-molybdenum-titanium etching solution is suitable for industrial production. And meanwhile, the safety of an operation environment is improved. Especially, under the condition of low hydrogen peroxide content, the copper-molybdenum-titanium etching solution shows excellent etching performance. In addition, the etching solution also has long copper service life, can effectively inhibit the negative influence of copper ions on the etching performance, prolongs the effective service time of the etching solution in a high copper content state, greatly reduces the replacement frequency of the etching solution, reduces the production cost, and improves the production efficiency.

The invention discloses an immobilized organic base catalyst and a preparation method and application thereof, the immobilized organic base catalyst comprises functionalized activated carbon, the functionalized activated carbon has a Bronsted base site comprising an organic Bronsted base molecular structure, the organic Bronsted alkali molecular structure is connected to the surface of the functionalized activated carbon through a covalent bond. The immobilized organic base catalyst is a heterogeneous active carbon-based immobilized organic # imgabs0 # base catalyst, and has the advantages of low preparation cost, high reaction activity, good stability and the like.

The present application provides a device and method for preparing methyl isoamyl ketone. In the method, acetone and isobutyraldehyde are reacted under the catalysis of a condensation catalyst and a hydrogenation catalyst in the presence of hydrogen to obtain the methyl isoamyl ketone, wherein the condensation catalyst comprises an organic base; and the molar ratio of the condensation catalyst to the isobutyraldehyde is (0.02-0.15):1. The MIAK obtained by the method has at least one of the advantages of high conversion rate, simple process flow, low production cost, easy separation of side reaction products, and high product purity.

The invention relates to the technical field of non-ferrous metallurgy, and discloses a dissolution method of high-iron-monohydrate-boehmite type bauxite. The method comprises the following steps: (1) preparing mixed ore pulp from high-iron monohydrate bauxite, sodium aluminate circulating mother liquor and an additive; the additive is one or a mixture of more of organic alkali, carboxylic acid and amino acid; (2) the mixed ore pulp is subjected to ultrasonic treatment and then heated to 190-280 DEG C for a dissolution reaction, dissolution slurry and dissolution residues are obtained, the dissolution residues are subjected to magnetic separation and recovery, and iron ore concentrate is obtained; the power of the ultrasonic treatment is 200 to 300W, and the time of the ultrasonic treatment is 30 to 50 minutes. According to the method, the problem that iron minerals are difficult to separate due to silicon minerals in the dissolution process of the high-iron monohydrate bauxite is solved. The method is simple in process, low in production cost, low in equipment requirement and good in industrialization prospect.

The invention provides a thioether oxidation catalyst, a preparation method thereof and a preparation method of pyroxasulfone. The preparation method comprises the following steps: S1, preparing a selenium source and a first solvent into a first solution; s2, adding a Lewis acid source into the first solution, and performing first mixing to obtain a second solution; s3, adding an organic alkali ligand source into the second solution, and performing second mixing to obtain a third solution; and S4, carrying out solvothermal reaction on the third solution at 100-150 DEG C to obtain the thioether oxidation catalyst. A selenium source, a Lewis acid source and an organic alkali ligand source are subjected to a combined reaction according to a specific sequence and conditions, and finally the inorganic-organic hybrid selenite catalyst with a special structure is formed under a solvothermal condition. The obtained catalyst is high in active atom utilization rate and strong in reactant molecule adsorbability, is beneficial to deep oxidation of reactants, accelerates oxidation of thioether into sulfone, and improves reaction selectivity and production efficiency.

The invention discloses a polyarylamine hole transport material, a synthesis method thereof and a perovskite solar cell, and belongs to the field of chemical and energy materials. The synthesis method comprises the following steps: mixing arylamine, aryl halide, a palladium catalyst, a phosphine ligand and organic alkali, carrying out a reflux reaction, and then adding an end-capping reagent to terminate the reaction; and settling the product in methanol, carrying out suction filtration to obtain a solid, and then carrying out Soxhlet extraction. By adjusting the activity of the reaction intermediate, two continuous C-N cross-coupling catalytic cycles are achieved, in the first catalytic cycle, high-reaction-activity arylamine and aromatic halide are coupled to generate a low-activity bifunctional secondary arylamine intermediate, the intermediate is kept in a dormant state in the first catalytic cycle, and after primary arylamine is completely consumed, the intermediate is separated from the primary arylamine, and the secondary arylamine is separated from the primary arylamine. And the secondary arylamine intermediate and the aromatic halide are subjected to coupling polymerization, so that accurate synthesis of a series of polyarylamine with narrow molecular weight distribution is realized. The polyarylamine can be used as a hole transport material to construct a perovskite solar cell, adjust interface hole extraction and promote perovskite growth.

The invention provides a VOCs catalyst as well as a preparation method and application thereof, and belongs to the field of atmosphere prevention and control. The invention provides a VOCs (Volatile Organic Compounds) catalyst. The VOCs catalyst comprises a modified ZSM-5 zeolite molecular sieve and active metal and / or oxide of the active metal loaded on the modified ZSM-5 zeolite molecular sieve, the preparation method of the modified ZSM-5 zeolite molecular sieve comprises the following steps: mixing a ZSM-5 zeolite molecular sieve and an organic alkali solution, and carrying out a hydrothermal reaction to obtain an organic alkali-loaded ZSM-5 zeolite molecular sieve; and roasting the ZSM-5 zeolite molecular sieve loaded with the organic alkali, and removing the organic alkali to obtain the modified ZSM-5 zeolite molecular sieve, the organic alkali solution is a tetrapropylammonium hydroxide solution.

The invention discloses a preparation method of an ultra-pure hydroxylamine aqueous solution, and relates to the field of organic chemistry and chemical industry production. The method comprises the following steps: reacting electronic-grade hydroxylamine salt with organic alkali in a proper solvent to generate hydroxylamine, then separating and removing salt and unreacted hydroxylamine in a reaction solution through a mercaptopyridine ion exchange modified membrane, and finally concentrating the solution into 50wt% ultra-high-purity hydroxylamine aqueous solution by adopting reduced pressure evaporation or multi-effect evaporation. The process has the characteristics of high efficiency, environmental protection, simplicity and easiness in operation, effectively improves the purity, yield and separation efficiency of hydroxylamine, and meets the strict requirements of electronic grade hydroxylamine on purity and metal ion content.

The invention provides a photoacid generator, a preparation method thereof and a photoresist based on the photoacid generator. The photoacid generator is 4-alkyl-N-hydroxyl naphthalimide fluoroalkyl sulfonate, and the molecular structural formula of the photoacid generator is # imgabs 0 #, and in the formula, R is alkyl. The preparation method of the photoacid generator comprises the following steps: S1, dissolving 5-alkyl acenaphthene in a first solvent, heating, adding potassium permanganate in the heating process, then heating to reflux for reaction, and after the reaction is finished, purifying to obtain 4-alkyl-1, 8-naphthalic anhydride; s2, dissolving the 4-alkyl-1, 8-naphthalic anhydride, hydroxylamine hydrochloride and a first inorganic base in a second solvent for reaction, and after the reaction is finished, purifying to obtain 4-alkyl-N-hydroxy-1, 8-naphthalic imide; and S3, adding the 4-alkyl-N-hydroxy-1, 8-naphthalimide and an organic alkali into a third solvent, dropwise adding fluoroalkyl sulfonic anhydride, heating to react after dropwise adding is completed, and purifying after the reaction is completed to obtain the 4-alkyl-N-hydroxy-1, 8-naphthalimide. The photoresist based on the photoacid generator provided by the invention is large in ADR, and the negative photoresist development defect and the standing wave are improved.

The invention discloses a high-efficiency fluorite collecting agent and a preparation method thereof. The high-efficiency fluorite collecting agent comprises the following raw materials in parts by weight: 20-45 parts of oleic acid with different iodine values, 5-10 parts of an amidate surfactant, 3-5 parts of inorganic alkali or organic alkali and 10-25 parts of a low-carbon-chain alcohol compound. The amidate surfactant is a nonionic surfactant, the structural general formula of the amidate surfactant is R1-C (O) NH (CH2) nCH2-R2, in the formula, R1 is a hydrocarbon chain containing 12-18 carbon atoms, n is equal to 5-6, and in the formula, R2 is a functional group with a hydrogen bond effect. According to the fluorite collecting agent, the efficient recovery rate of fluorite is guaranteed, meanwhile, the grade of fluorite concentrate is improved to a certain degree, the using amount of the collecting agent is reduced, and the problem that the fatty acid fluorite collecting agent is poor in fluorite concentration efficiency is solved.

The invention discloses a synthesis method of a 9, 9-di-n-octylfluorene copolymer, which comprises the following steps: under the action of an N-heterocyclic carbene palladium complex and organic alkali, reacting 9, 9-dioctylfluorene-2, 7-bis (boronic acid pinacol ester) with 2, 5-dichloropyridine to obtain the 9, 9-di-n-octylfluorene copolymer, and reacting the 9, 9-di-n-octylfluorene copolymer with the boronic acid pinacol ester to obtain the 9, 9-di-n-octylfluorene copolymer. The structure of the N-heterocyclic carbene palladium complex is as shown in a formula (I): # imgabs0 # formula (I); the 9, 9-di-n-octylfluorene copolymer is prepared through catalysis of the N-heterocyclic carbene palladium complex, the 9, 9-di-n-octylfluorene copolymer has the advantage of being high in catalysis efficiency, the 9, 9-di-n-octylfluorene copolymer with high molecular weight and narrow distribution can be obtained, and the problems that a phosphine ligand catalyst is large in toxicity and the like are solved; and the application of the 9, 9-di-n-octylfluorene copolymer in preparation of a hole transport layer of a perovskite solar cell is developed.

The invention relates to a method for catalytically degrading a polyester material by using an ionic liquid and application of the polyester material, and mainly solves the technical problems of high energy consumption, environment unfriendliness and complex process in polyester material recovery research in the prior art. According to the technical scheme, the novel method for catalytically degrading the polyester material through the ionic liquid comprises the steps that the ionic liquid is used as a catalyst, diol is used as an alcoholysis agent, polyester is catalytically degraded, and the ionic liquid has the following general formula: A + B-(I); in the formula, A < + > is an organic alkali cation, and B <-> is an alkoxy anion, the problem is well solved, and the method can be applied to polyester recovery industry.

An improved solvent system for the formulation and application of N-alkyl thiophosphoric triamide urease inhibitors. These formulations provide safety and performance benefits relative to existing alternatives and enable storage, transport and subsequent coating or blending with urea based or organic based fertilizers. These formulations are comprised primarily of environmentally friendly aprotic and protic solvents (particularly dimethyl sulfoxide and alcohols / polyols) to stabilize the urease inhibitor.

The invention discloses a polymer resin and a preparation method thereof, an optical lens and intelligent glasses, and relates to the technical field of resin materials. The polymer resin comprises a thioamide group, a thioether group and an aromatic group, and is prepared from the following raw materials: thiocyanate, a sulfhydryl compound, an organic base catalyst and a solvent. The oxidation resistance and the stability of the polymer resin can be improved, and the polymer resin also has high refractive index performance.

The invention relates to a high-orientation polyimide fiber based on liquid crystal spinning and a preparation method of the high-orientation polyimide fiber. Rigid anhydride is used as a raw material to prepare para-diacid diester, and the para-diacid diester and rigid diamine are polymerized to prepare a full-para polyamic acid ester solution with lyotropic liquid crystal characteristics; and then adding an organic base catalyst to prepare a spinning solution, and carrying out high-temperature dry spinning, catalytic cyclization and high-temperature heat treatment to prepare the high-orientation polyimide fiber. According to the invention, an organic base catalyst is introduced into a spinning solution with lyotropic liquid crystal characteristics, and the high orientation of a liquid crystal domain along a fiber axis is realized by virtue of the shearing and fluid stretching effects of spinneret orifices; then, on the basis of high-temperature dry spinning and catalytic cyclization reaction, structural transformation from polyamide acid ester to polyimide is achieved while curing forming of the fiber is promoted, locking of an oriented structure and densification of the interior of the fiber are achieved, and therefore the stability and uniformity of the fiber are guaranteed; the method has great application potential in the field of extreme special environments such as aerospace.

The invention discloses an anti-collapse photoresist flushing fluid and a photoetching method for forming a photoresist pattern, the anti-collapse photoresist flushing fluid comprises a nonionic surfactant, an anionic surfactant, an organic alkali and a solvent, the nonionic surfactant is # imgabs0 #; and the anionic surfactant is isooctyl alcohol ether phosphate ester or isooctyl alcohol polyoxyethylene ether phosphate ester. According to the invention, the alkynediol nonionic surfactant has the effect of double tails with interconnected bipolar groups and has a synergistic effect with the anionic surfactant, so that the surface tension of the flushing fluid is reduced while the activity of the surfactant is improved, thereby reducing the internal stress of photoresist lines and preventing collapse; bis-OH in the alkynediol and incompletely developed free carboxylic acid in the photoresist are subjected to esterification reaction to generate a hydrophobic material surface layer, so that the line edge roughness and the image surface roughness are improved; organic alkali and functional groups on the surface of the photoresist are subjected to cross-linking reaction, so that the mechanical property is improved, and collapse is further prevented.

The invention relates to an indole hair dye based on air oxidation. The hair dye provided by the invention is characterized in that a chemical strong oxidant is not added, and oxygen in air can be catalyzed by using an air oxidation catalyst and a metal ion catalyst to naturally finish the oxidative polymerization process of indole substances (natural bionic melanin precursor substances). The used reducing agent is a combination of cysteine and a derivative thereof and sodium sulfite and a derivative thereof, the oxidative polymerization speed of indole substances can be controlled, and finally generated melanin macromolecules are embedded in hair cortex, so that white hair is obviously blackened. The natural oxidation process does not need hydrogen peroxide, destructive strong base or organic base, so that the use of harmful chemical reagents is reduced, the formula is simplified, the hair dyeing process is milder, potential hazards to hair and scalp are reduced, and the natural oxidation hair dye is safe, environmentally friendly and sustainable.

The invention discloses a kind of high-efficiency and environment-friendly developer for PCB board, and the developer includes the following components by mass: 60-100 parts of organic alkali composition; 30-80 parts of cosolvent; 30-70 parts of defoamer; 40-70 parts of surfactant; 20-50 parts of antioxidant; 15-45 parts of penetrant; 30-50 parts of buffer; 10-20 parts of inhibitor; The invention also discloses a preparation process of high-efficiency and environment-friendly developer for PCB board. The present invention develops PCB board by using organic alkali composition, fully dissolves dry film by ether group, hydroxyl group and amine group, avoids solid precipitation caused by traditional carbonate development, thereby effectively improving the efficiency and quality of PCB development process; penetrant and cosolvent are added at the same time, significantly improving the penetration and dissolution effect of developer on dry film, further improving development efficiency; and with the antioxidant, buffer etc. added therein, the antioxidant capacity of developer and PCB board can be improved, and the stability of developer during use is ensured.

The invention relates to a two-agent type copper acid etching solution for a liquid crystal panel as well as a preparation method and application of the two-agent type copper acid etching solution. The etching liquid comprises an etching liquid main agent and an etching liquid auxiliary agent, and the etching liquid main agent comprises the following components in parts by weight: 5-20 parts of hydrogen peroxide; 5-15 parts of an acidic material; 3-10 parts of an organic base; 0.01 to 0.1 part of a corrosion inhibitor; 0.01 to 0.08 part of a chelating agent; 0.3-2 parts of a stabilizer; 60 to 80 parts of deionized water; the etching liquid auxiliary agent comprises the following components: 30-45 parts of an acidic material; 30 to 50 parts of organic base; 0.02 to 0.2 part of a corrosion inhibitor; 0.3-2 parts of a stabilizer; and 40 to 60 parts of deionized water. The chelating agent in the etching solution has double effects of corrosion inhibition and chelation, the pH value of the main agent can be adjusted, the etching environment of the etching solution is stabilized, the service cycle of the main agent in the etching process is prolonged, the etching capability of the two-agent type etching solution can be kept consistent after 48 hours, and the pH value and the hydrogen peroxide content are kept stable.

The invention relates to a method and a device for preparing an organic alkali salt of bis (fluorosulfonyl) imide. Ammonia gas, sulfuryl fluoride and liquid organic alkali are adopted as reaction raw materials, and under the condition that no solvent is added or a small amount of solvent is added, the raw materials react through pressurization to generate the organic alkali salt of the bis (fluorosulfonyl) imide. As no solvent is used or only a small amount of solvent is used in the reaction, the chroma of the obtained product is relatively low, and subsequent preparation of lithium bis (fluorosulfonyl) imide as a precursor is facilitated. The invention provides a simple and effective method for reducing the chromaticity of the imidodisulfuryl fluoride salt.

The invention belongs to the technical field of perfluoropolyether fluorosilicone oil preparation, and particularly relates to polyvinyl perfluoropolyether fluorosilicone oil and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out ring-opening reaction on tetramethyl tetravinyl cyclotetrasiloxane and cyclosiloxane to prepare polyvinyl polysiloxane, then carrying out reaction on the polyvinyl polysiloxane and perfluoropolyether trimethoxy silane to prepare polyvinyl perfluoropolyether fluorosilicone oil; the modified catalyst, which is prepared by carrying out a reaction on 1, 2, 5-g] isoquinoline and 2-iodopropane to prepare modified organic alkali and then carrying out a reaction on the modified organic alkali, tris (pentafluorophenyl) boron and mercaptan, has relatively high reaction activity, and avoids the difficulty in impurity removal by using a plurality of catalysts; the perfluoropolyether trimethoxy silane, which is prepared by reacting perfluoropolyether alcohol with allyl chloroformate and then carrying out addition with trimethoxy silane, has excellent mechanical properties. The preparation process is relatively simple, addition and use of a fluorine-containing solvent in the reaction process are reduced, and the prepared product contains more vinyl functional groups and has higher crosslinking degree and corrosion resistance.

The invention discloses a fertilizer suitable for saline-alkali soil and a preparation method and device thereof, and relates to the field of saline-alkali soil fertilizers.The fertilizer particles are of at least N layers of core-shell structures, first compositions are arranged on the odd layers from inside to outside, second compositions are arranged on the even layers from inside to outside, N is an odd number larger than or equal to 3, and the core-shell structures are of a core-shell structure. The composition I is prepared from the following raw materials: an organic base fertilizer, a nitrogen-phosphorus-potassium base fertilizer, ammonium lignosulfonate, amino acid, a microbial agent and a mariculture product extract. The fertilizer particle has an odd-layer core-shell structure, the outermost layer is nutrient substances, the problem that the composition I on the surface is rapidly dissolved along with irrigation when the fertilizer is just put into the saline-alkali soil is solved, the effect of rapidly improving the saline-alkali soil is achieved, and the survival rate of seedlings is increased. After the irrigation period is finished, the composition II protects the composition I on the inner layer and waits for the next irrigation period, so that the excessive concentration of the fertilizer in a short time can be avoided, the purpose of slowly releasing the fertilizer can be achieved, and the fertilization frequency of the saline-alkali soil is reduced.

The present invention relates to: a slurry composition for final polishing of a silicon wafer, which reduces haze and the number of defects in the surface of an object to be polished and has excellent performance; and a final polishing method using same, the slurry composition comprising 1-20 wt % of colloidal silica as abrasive particles, 0.03-0.5 wt % of a surfactant, 0.1-10 wt % of a pH adjuster, 0.02-2 wt % of a water-soluble thickener, 0.05-0.2 wt % of a chelating agent, and 0.1-1 wt % of an organic base.

The invention relates to the technical field of material preparation, and particularly discloses a functionalized NH2-MIL-125 (Ti)-based material as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, under the action of an organic base catalyst, grafting an imidazole group to an amino group of NH2-MIL-125 (Ti) to obtain imidazole grafted NH2-MIL-125 (Ti); then, the imidazole modified NH2-MIL-125 (Ti) material and alkyl bromide are subjected to a coordination reaction, and the functionalized NH2-MIL-125 (Ti)-based material is obtained. The functionalized NH2-MIL-125 (Ti)-based material provided by the invention has the advantages of high adsorption capacity, high selectivity, high adsorption rate, high reduction efficiency, stable structure and the like in the aspect of adsorbing and reducing the noble metal, and a very potential solution is provided for recycling and reusing the noble metal.

The invention relates to the field of polyimide films, and discloses a catalytic polyimide film preparation method, which comprises: S1, preparing a prepolymer, dissolving a fluorine-containing diamine monomer in a polar solvent, placing in a reaction kettle, adding an aromatic dianhydride monomer at a low temperature of 0-10 DEG C, stirring, mixing, and reacting to generate a polyamide acid solution; s2, primary catalysis: adding an organic base catalyst into the polyamide acid solution prepared in the step S1; s3, second-stage catalysis: after the step S2 is completed, adding a coordination type organic basic catalyst into the first-stage catalyst; and S4, film formation and post-treatment. Amidation and ring-closure reactions are promoted in stages through the synergistic effect of the double catalysts, the reaction rate matching performance is remarkably improved, accurate control over molecular chains is achieved, a high-purity polymer matrix with uniform molecular weight distribution and complete ring closure is obtained, and the structural uniformity and mechanical strength of the film are fundamentally improved; the structure defect caused by incomplete reaction under a traditional single catalytic system is avoided.

The present invention belongs to the technical field of petrochemical catalysis, and relates to a preparation method for improving the stability of a Cu-Beta zeolite catalyst for preparing caprolactam from caprolactone, and the use thereof. In the present invention, a cavity-modified dealuminated Beta zeolite is used as a carrier, and copper is loaded in pore channels of the zeolite carrier by means of an improved ammonia distillation method. The cavity modification refers to subjecting the dealuminated Beta zeolite carrier to a desiliconization technique controlled by the use of a weak organic base so as to enlarge silanol nests generated by dealumination of the dealuminated Beta zeolite carrier, thereby better accommodating and stabilizing the nano and sub-nano copper particles. The core of the improved ammonia distillation method involves impregnating a zeolite carrier with an equal volume of a copper-ammonia complex solution, such that the copper-ammonia complex mainly undergoes, during ammonia distillation, a reaction of depositing copper hydroxide in zeolite pore channels, thereby improving the sintering resistance. The Cu-Beta catalyst prepared using the method provided by the present invention exhibits high activity, selectivity and stability when applied to the reaction of caprolactam prepared from caprolactone via gas-solid phase hydroamination.

The invention relates to a synthetic method of a finelrenone racemate, which comprises the following steps: carrying out Knoevenagel condensation, Hantzsch dihydropyridine synthesis, O-ethylation and deprotection four-step reaction, selecting a compound shown as a formula (2) and a compound shown as a formula (3) as initial raw materials, and carrying out Knoevenagel condensation reaction under the combined action of organic alkali and organic acid to synthesize a compound shown as a formula (4); carrying out Hantzsch reaction on the compound in the formula (4) and a compound in a formula (5) to synthesize a compound in a formula (6); carrying out O-ethylation reaction on the compound shown in the formula (6) and an ethylation reagent under the catalysis of acid to synthesize a compound shown in a formula (7); finally, 2, 4-dimethoxybenzyl is removed from the compound shown in the formula (7) under the promotion of acid to synthesize the finerenone racemate, the method is high in selectivity and simple in post-treatment, the yield and purity of the product are high, the HPLC purity can reach 99% or above, a new synthesis route and method are developed for synthesizing the finerenone racemate, and the method has good application potential and research value.

The invention provides a viloxazine hydrochloride product impurity as well as a synthesis method and application thereof, and belongs to the technical field of medicine synthesis. The viloxazine hydrochloride product impurity is shown as a formula (I), the synthesis method comprises the following steps: adding epichlorohydrin and organic alkali into 2-ethoxyphenol for preliminary reaction, adding an alkaline solution for further reaction, and purifying to obtain a compound 1; and dissolving the compound 1, adding piperazine for reaction, stirring to obtain a reaction mixture, and purifying to obtain the viloxazine hydrochloride product impurity. The invention also provides an application of the viloxazine hydrochloride product impurity. Compared with the prior art, the synthesis method provided by the invention is simple and feasible, the raw materials are easily available, and the operation is convenient; the prepared viloxazine hydrochloride product impurity can be applied to quality control of a viloxazine hydrochloride product. # imgabs0 #

The invention relates to the technical field of etching solutions, in particular to a Cu-MTD alloy etching solution composition and application thereof. The composition comprises a main agent and an auxiliary agent, and the main agent comprises the following components in percentage by weight: 12-20% of hydrogen peroxide, 6-15% of first organic acid, 0.001-0.08% of a first pH regulator, 2-8% of organic alkali and the balance of deionized water; and the auxiliary agent comprises 20-55% of second organic acid, 2-10% of inorganic acid, 0.05-0.5% of a second pH regulator, 10-30% of an alkaline compound and the balance of deionized water. According to the etching solution, the main agent and the auxiliary agent are compounded, the taper angle of a Cu layer can be larger than 42 degrees, and the service life cycle can reach that the Cu concentration is larger than or equal to 10000 ppm.