49 results about "Metal free" patented technology

The application belongs to the field of medicine synthesis, and particularly relates to a preparation method of mesopram racemate. First, 1-(4-methoxy-3-propoxyphenyl) ethan-1-one, methyl triphenylphosphonium bromide and alkali are reacted in a solvent under inert gas protection to obtain a styrene intermediate I; then the intermediate I, a BocNCl2 reagent and an alkali reagent are reacted in a solvent to generate the mesopram racemate. The method provided by the application has the advantages of short steps, low cost, no metal residue and mild reaction conditions, and is suitable for industrial production.

This invention discloses a method for preparing a metal-doped anode material with high closed-pore ratio, comprising the following steps: pre-oxidation, liquid-phase coating, isostatic pressing, metal doping, and carbonization. By using glucose to liquid-phase coat pre-oxidized biomass char, followed by isostatic pressing to form a dense and uniform composite carbon framework, the pores are predominantly closed pores of 0.4-2 nm, and the carbon layer is tightly bonded to the matrix without cracks. Furthermore, by gas-phase doping with zinc, zinc is uniformly dispersed in the form of single atoms / clusters and embedded in the carbon lattice, forming a unique Zn-C coordination structure without metal particle agglomeration defects. Simultaneously, the high temperature of 1400-1600℃ promotes the migration of zinc atoms into the carbon lattice depth, improving the microcrystallinity of the carbon material while retaining sodium storage active sites, resulting in stronger structural stability and ultimately achieving a high closed-pore ratio, thereby improving the capacity and rate performance of the anode material.

This invention provides a method for preparing 4,1-disubstituted pyrrolo[1,2-a]quinoxaline-1-yl ketone derivatives, belonging to the field of organic synthesis technology. This invention uses 2-(1H-pyrrolo-1-yl)aniline compounds and α-carbonyl acids as reactants, employing only ammonium persulfate as an oxidant. Under metal-free catalysis, a one-pot tandem reaction is carried out to simultaneously complete the cyclization of the pyrrolo[1,2-a]quinoxaline nucleus and the C-1 acylation modification. The substituents at the 4- and 1-positions of the product can be flexibly controlled by changing the α-carbonyl acid with different structures. This method requires no pre-modified substrate, eliminates the need for metal catalysts, avoids the risk of metal residue, and features simplified steps and high functional group compatibility, providing a new green and low-cost route for the synthesis of polysubstituted pyrrolo[1,2-a]quinoxaline ketone derivatives.

The application discloses a force-ultraviolet-X ray three-mode excited doped organic room-temperature phosphorescent material and a preparation method and application thereof. The doped organic room-temperature phosphorescent material comprises a guest compound and a host compound, and the host compound comprises halogenated benzophenone or unsubstituted benzophenone. The doped organic room-temperature phosphorescent material provided by the application can generate stable phosphorescent emission under external force stimulation, ultraviolet light and X ray excitation. Moreover, the preparation method is simple, the cost is low, the excitation mode is various, and the doped organic room-temperature phosphorescent material can emit light in the condition of no light source. The doped organic room-temperature phosphorescent material provided by the application adopts pure organic material, is not doped with metal, the structure is convenient to modify, is more green and economical, and is more in line with the development trend of green chemistry. The material can be used in the field of force-induced light emission and can be applied to the field of X ray imaging.

The application discloses a kind of ultrafast metal-free and solvent-free preparation method for preparing symmetric and asymmetric disulfide, which comprises the following steps: at room temperature, raw material R-SH, R'-SH and oxidant and base are added to reaction bottle, shake rapidly for 10-30 seconds, and R-S-S-R' is prepared after the reaction product is purified;Wherein R in R-SH is aliphatic or aromatic group, R' in R'-SH is aliphatic or aromatic group;R in R-SH and R' in R'-SH are same or different;The aromatic group has substituent or no substituent, and the aliphatic is straight chain or has branch;The oxidant is chloroform, and the base is N, N-diisopropylethylamine (DIPEA).The method is simple in operation, high in yield (60-99%), ultrafast in reaction kinetics, greatly improves production efficiency, wide in applicability, avoids the use of organic reaction solvent, raw material is cheap and easy to obtain, and does not contain residual metal and other sticky contaminants from reagent and ligand, provides a safer and more effective method for the synthesis and production of symmetric and asymmetric disulfide-containing compounds.

The application relates to the technical field of magnesium alloy detection, and discloses a connecting piece for magnesium alloy SSRT (stress-strain-rupture-temperature) experiments and a preparation method thereof, the preparation method comprising the following steps: firstly, PA6 resin is pretreated by Soxhlet extraction to remove residual polymerization metal catalysts and small-molecule oligomers; secondly, the purified PA6 base material is mixed with a hydrolysis-resistant stabilizer, glass beads and other additives, special modified PA6 granules are obtained through double-stage vacuum melting, blending and granulation, then the connecting piece preform is injection molded by adopting a process of in-mold step pressure keeping and synchronous constant-temperature cooling, and after saturated steam gradient annealing in an inert atmosphere, a dense non-polar crosslinking passivation layer is formed on the surface of the blank body through low-temperature argon plasma activation and gas-phase in-situ deposition crosslinking, and finally the target connecting piece is obtained. The connecting piece prepared by the application has no risk of metal ion precipitation, and has excellent insulation, hydrolysis resistance and mechanical bearing performance.

This invention discloses a thin-film lithium niobate silicon optical integrated chip and its fabrication method. The thin-film lithium niobate silicon optical integrated chip sequentially comprises a metal-free silicon photonic base chip, a thin-film lithium niobate waveguide layer bonded thereon, a silicon dioxide cladding covering the chip, and at least two functionally separated metal layers located above the cladding. The first metal layer serves as an electrical contact and modulation electrode, and the second metal layer is interconnected with the first layer via a visor and serves as a traveling wave electrode. The fabrication method is used to fabricate the thin-film lithium niobate silicon optical integrated chip. Advantages: In this invention, the silicon photonic base chip does not contain any metallization layer (except for metal silicides) before bonding to the thin-film lithium niobate layer, thus ensuring the flatness of the bonding interface and bonding quality, and reducing interlayer coupling loss.

This invention relates to the field of fine chemical technology and discloses a metal-free catalytic purification and distillation process for chromatographic grade tetrahydrofuran. This process uses industrial-grade tetrahydrofuran as raw material. First, a fully metal-free composite impurity remover is used for synergistic pretreatment, efficiently decomposing peroxides and converting polar impurities such as aldehydes and ketones into easily separable high-boiling-point products under normal pressure and mild conditions, without introducing any metal elements. Then, through pre-distillation to remove light components and dehydration, deep purification without metal adsorption, high-efficiency precision distillation purification, aseptic filtration, and nitrogen-filled packaging, the final chromatographic grade tetrahydrofuran product is obtained. This invention completely solves the industry pain points of traditional processes, such as excessive metal residues, high safety risks from high-pressure hydrogenation, and incomplete impurity removal. Furthermore, the process can be continuously produced, is safe to operate, generates little waste, is environmentally friendly, and has excellent industrial application value.

This invention discloses a eutectic explosive for laser-initiated detonation and its preparation method. The basic structure of the eutectic explosive includes one CL-20 molecule, two DATNBI molecules, and two acetonitrile molecules. The unit cell parameters of the eutectic explosive are α = 94.764°, β = 95.065°, γ = 107.066°, Z = 2, belonging to the monoclinic crystal system, space group P-1. The CL-20 / DATNBI eutectic of this invention exhibits low insensitivity and good thermal stability. It can be used as a new generation of metal-free laser-initiated explosives through a molecular-level hierarchical detonation structure, showing promising application prospects in the field of laser-initiated detonation.

This invention discloses a composite filter material, apparatus, and method for removing metal ions from white oil, relating to the field of white oil purification technology. The composite filter material comprises a kaolinite layer, a montmorillonite layer, a porous resin layer, and a filter cotton layer. The kaolinite particle size in the kaolinite layer is ≤1mm; the montmorillonite particle size in the montmorillonite layer is ≤50nm; the porous resin particle size in the porous resin layer is ≤1mm; and the filter cotton in the filter cotton layer has a mesh size ≥600 mesh and a thickness ≥2mm. By employing a composite filter material formed from the kaolinite, montmorillonite, porous resin, and filter cotton layers, and controlling the particle size, mesh size, and / or thickness parameters of each layer, metal ions and impurities in white oil can be effectively filtered, resulting in white oil free of metal ions after recovery. This prevents discoloration of ceramic green bodies after sintering, ensuring the quality of ceramic products.

This invention belongs to the field of organic synthesis, specifically relating to a method for synthesizing 2,9-dimethyl-1,2,3,4-tetrahydro-1,10-phenanthroline. The method includes: using 2,9-dimethyl-1,10-phenanthroline as a raw material, under a normal pressure carbon dioxide atmosphere, using pinacol diborate as a reducing agent and N,N-dimethylacetamide as an organic solvent, mixing the above components and carrying out a reductive hydrogenation reaction to produce 2,9-dimethyl-1,2,3,4-tetrahydro-1,10-phenanthroline as shown in formula (2). This invention provides a novel method for synthesizing tetrahydroquinoline compounds using pinacol diborate as a reducing agent under normal pressure carbon dioxide conditions. This method has advantages such as mild reaction conditions, no metal residue, environmental friendliness, high reaction selectivity, and a short synthesis procedure, making it suitable for the efficient preparation of target compounds.

This invention discloses an antioxidant foaming material and its preparation method. The material is formed by mixing and reacting component A and component B in a weight ratio of 100:30-50. Component A includes the following raw materials in parts by weight: 90-100 parts of a basic polyether composition, 1-4 parts of water, 0.5-2 parts of an organosilicon surfactant, 0.3-1.5 parts of a complex amine catalyst, and 0.5-2 parts of a complex antioxidant. The basic polyether composition is a compound of white oil polyether polyol and trifunctional polyether polyol. Component B is toluene diisocyanate, which is a mixture of 2,4-toluene diisocyanate and 2,6-toluene diisocyanate. This invention uses a metal-free complex amine catalyst, completely free of metal components such as tin, bismuth, and zinc, which avoids the catalytic acceleration effect of metal ions on the oxidative degradation reaction, significantly delays the thermo-oxidative decomposition and mechanical decay of polyurethane segments, and improves the environmental friendliness of the material, meeting the requirements for low-toxicity and low-residue use in home and automotive interiors.

The application discloses a kind of continuous flow photocatalytic decarboxylation preparation biological hydrocarbon method, belong to the technical field of biofuel preparation.The method includes the following steps: high fatty acid compound, hydrogen atom transfer catalyst and acridine photocatalyst are dissolved in organic solvent, and mixed solution is obtained;The mixed solution is passed into circulating continuous flow light reactor, and photocatalytic decarboxylation reaction is carried out at room temperature for 12-24 hours, and reaction liquid is obtained;Reaction liquid is separated by reduced pressure distillation, and the biological hydrocarbon compound after decarboxylation is obtained.The application uses continuous flow light reactor to strengthen mass transfer and heat transfer efficiency, solves the problem that light penetration depth is limited in traditional batch photoreactor, and reaction is not uniform;Metal-free catalytic system is used, and the use of noble metal and potential residual risk is avoided.The method has mild reaction condition, higher product yield, good atom economy, and for unsaturated high fatty acid, olefin configuration can be maintained before and after decarboxylation, and has good industrial application prospect.

The application relates to a boron and nitrogen co-doped carbon catalyst, a preparation method thereof and a method for catalytically synthesizing unsymmetrical organic carbonates, and belongs to the field of catalytic organic synthesis. The application constructs a boron and nitrogen co-doped carbon material-based metal-free catalytic system, utilizes Lewis acid-base site synergism, realizes efficient synthesis of unsymmetrical organic carbonates, reduces the substrate ratio of symmetrical carbonates and alcohols, reduces separation energy consumption and cost, improves the applicability of the catalytic system to various alcohol substrates, and excellent catalytic activity is shown for alkyl alcohol, cycloalkyl alcohol, aryl alcohol, heterocyclic alcohol and other biomass alcohols, high yield and high selectivity are ensured, Lewis acid-base synergistic sites are constructed in the carbon material through boron and nitrogen co-doping, traditional metal-based catalysts are replaced, metal residues are avoided, the product can be used in fields such as medicine and food which have high purity requirements, the application scenarios are wider, the subsequent treatment pressure of catalyst separation and recovery is reduced, and the economic efficiency and greenness of the process are strengthened.

This invention discloses a nitrogen, sulfur, and fluorine triple-doped metal-free carbon-based catalyst, its preparation method, and its applications, belonging to the field of electrochemical catalyst technology. The catalyst uses p-trifluoromethylthiobenzaldehyde and melamine as monomers, with dimethyl sulfoxide as the sulfur source in solvent, to form a porous organic polymer precursor via polymerization, followed by pyrolysis. This achieves highly efficient in-situ co-doping of nitrogen, sulfur, and fluorine. The resulting catalyst exhibits excellent dual-function catalytic activity for oxygen reduction and oxygen evolution in alkaline electrolytes, with an oxygen reduction half-wave potential of 0.88 V and an OER overpotential of only 1.64 V at 10 mA cm⁻². The catalyst also possesses outstanding stability and resistance to methanol cross-contamination. A zinc-air battery assembled with this catalyst has an open-circuit voltage of approximately 1.50 V and a peak power density of 230.5 mW cm⁻², superior to commercial Pt / C. This invention utilizes inexpensive raw materials and a simple process, providing a high-performance dual-function catalyst for high-performance metal-air batteries.

The application discloses a kind of free radical source molecule modified metal-free high-temperature ferromagnetic carbon materials, preparation method and application, material is obtained by electrochemical modification free radical source molecule on the surface or interlayer of carbon material, free radical source molecule is any one or more in quinone / quinone dimethyl derivative directly reduced by cathode or need pass through two-pole cooperation hydroxyl-naphthoquinone / anthraquinone molecule, carbon material is any one of bulk carbon material or powder carbon material;Preparation method includes: dissolving organic molecule in solvent to obtain molecular solution;Carbon material is fixed on electrode;Electrochemical reaction modification is carried out under constant voltage, and target product is obtained after drying;The application realizes metal-free, high Curie temperature ferromagnetic carbon material, with light weight, flexibility, excellent conductivity, adjustable magnetic characteristics, etc., can be used in electromagnetic shielding, microwave absorption, flexible magnetic response device and structure-electromagnetic integrated composite material and other fields in the future.

This invention provides a comprehensive recovery method for laterite nickel ore and sulfate wastewater. This invention eliminates the energy-intensive evaporation and crystallization stage in traditional sulfate wastewater treatment. It not only successfully captures heavy metals (nickel, cobalt, and manganese) from sulfate wastewater and laterite nickel ore, converting them into precipitates for recovery and yielding a high-purity sodium sulfate solution that can be directly used in other processes, but also achieves the resource utilization of laterite nickel ore. This comprehensive recovery of sulfate wastewater and laterite nickel ore is achieved without the generation of metal sludge during the recovery process, significantly reducing wastewater discharge and resource waste, and transforming waste management costs into revenue.

The application belongs to the field of fine chemicals and medicinal chemistry, and particularly relates to a catalyst for Claisen ester condensation and a preparation method and application thereof. The application improves the preparation method of alpha-ketoglutarate calcium, adopts cheaper and more easily obtained raw materials, and innovatively invents a guanidino-amino co-functional KIT-6 mesoporous silica (Gua-NH2@KIT-6) to catalyze the Claisen ester condensation reaction. The catalyst carrier obtained by the application has a large pore size (4-12 nm), a high specific surface area (>600 m 2 / g), a surface rich in silicon hydroxyl groups (-SiOH), is convenient for grafting organic bases, has good thermal / chemical stability, is simple to handle, is safe to operate, reduces water consumption, is completely free of metal residues, is not dissolved, can be separated by filtration, can be reused after simple washing, has a wide substrate application range, and is suitable for industrialization.

This utility model relates to the field of electronic cigarette technology and discloses an all-glass, metal-free atomizing oil tank, including a connecting ring. A threaded ring is threaded to the outer top of the connecting ring, and a shell is threaded to the outer side of the threaded ring. An oil tank is fixedly connected to the inner side of the shell. An air outlet pipe is formed in the middle of the inner wall of the shell, with a suction port at the top and an atomizer connected to the bottom. A sealing gasket is fixedly connected to the bottom outer side of the air outlet pipe, and a leak-proof gasket is fixedly connected to the bottom outer side of the atomizer. An installation ring is fixedly connected to the middle of the outer wall of the connecting ring, and a threaded slot is formed at the bottom of the outer wall of the connecting ring. In this utility model, the cooperation between the shell, air outlet pipe, and oil tank reduces the probability of leakage. Furthermore, the cooperation between the connecting ring, leak-proof gasket, and atomizer facilitates integrated processing of the mouthpiece and oil tank, making it more environmentally friendly and stable.

Included herein are methods and materials for nontoxic, biocompatible, optionally metal-free, tunable, and long-lasting coloration of human hair. More particularly, provided herein are methods, and associated formulations, for efficient formation and deposition of synthetic melanin to human hair, thereby coloration of hair, whereby the hair treatment formulation is viscous enough for treatment of hair without substantially loss of the formulation which further allows an easier application process that includes exposing the hair to the treatment formulation for an extended amount of time. For example, the hair treatment formulation, or viscous solution, can be applied and left on the hair, such as if it were a cream or gel, without requiring soaking the hair in a bath. Different colors can be achieved by tuning reaction conditions such as temperature and solution phase composition. These methods, and associated materials, can be used in salons and at home, for example, without degradation of the resulting colored hair and safety of the user of the present materials and methods.

The application discloses a kind of active site adjustable porous carbon catalyst based on waste plastics microwave pyrolysis preparation and its application in efficient activation peroxymonosulfate (PMS) degradation organic pollutants. The method is that polycarbonate (PC) is mixed with polypropylene (PP) or polyether sulfone (PES) waste plastics as carbon source, sodium hydroxide is used as microwave absorber and pore-forming agent, and microwave one-pot solid-phase pyrolysis method is used to prepare metal-free porous carbon catalyst (PC1PP3 and PC1PES3) under 800W power irradiation for 2 minutes. The application realizes directional switching of catalytic mechanism by regulating waste plastic components: doping PP significantly improves the graphitization degree, specific surface area (up to 934.99m 2 / g) and defect vacancy concentration of the material, and constructs a direct electron transfer channel; doping PES introduces thiophene sulfur sites and modifies the electronic structure of C=O sites, which promotes the generation of singlet oxygen ( 1 O2). The obtained catalyst shows excellent sulfamethoxazole (SMX) degradation performance in PMS activation system, and the highest reaction rate constant can reach 0.257min −1 . Moreover, PC1PP3 / PMS system realizes PMS utilization rate up to 92.5%. The application not only realizes high-value utilization of waste plastics, but also provides a new way for low-consumption drug and high-efficiency water treatment technology.

The application belongs to the technical field of lithium ion batteries without metal current collectors, and specifically discloses a metal current collector-free integrated self-supporting electrode as well as a preparation method and application thereof. The electrode comprises, from top to bottom, a positive active material layer, a first conductive functional coating, a porous diaphragm substrate, a second conductive functional coating and a negative active material layer. The first and second conductive functional coatings are both composite functional coatings containing a conductive agent and a binder, and are used to replace metal current collectors to realize electronic conduction. The preparation method comprises the following steps: forming conductive functional coatings on both sides of the porous diaphragm substrate synchronously through a spraying process, and then coating the positive and negative active material layers respectively to form an integrated self-supporting structure. The application eliminates the use of copper foil and aluminum foil, reduces the weight and cost of the battery, solves the problem of large electronic transmission impedance of the electrode without current collectors, simplifies the preparation process and assembly process, improves the structural stability and energy density of the battery, and can be widely applied to the field of lithium ion batteries.

The application discloses a self-heating type polymer solid-state battery composite diaphragm material and a preparation method, and comprises the following steps: activating a porous polymer base, constructing a self-heating functional layer in situ, coating an ion conductive modification layer, crosslinking an interface adaptation layer by ultraviolet, heat pressing and shaping, modifying by argon oxygen plasma, and drying at a final temperature; a multilayer composite diaphragm composed of a base, a self-heating layer, an ion conductive layer and an interface adaptation layer is prepared through the step-by-step process; the self-heating layer is composed of a carbon-based nano-conductive network and a conjugated polymer, and no metal conductive component is used, so that the risk of metal short circuit is completely avoided; the conjugated polymer and the carbon-based material form a continuous three-dimensional conductive path, the Joule heating is uniform after power-on, the temperature of the diaphragm can be raised to above 25 DEG C within 60s under the environment of-20 DEG C, the movement of the polymer electrolyte chain segment is simultaneously activated, the low-temperature ion transmission impedance is greatly reduced, and the problem that the solid-state battery cannot work at low temperature is solved.

The application discloses a flexible metal-free perovskite X-ray detector and a preparation method thereof. A metal-free perovskite precursor solution is filled into a flexible high polymer porous polymer nylon thick film through vacuum filtration. During a heating and annealing process, the perovskite filled in the flexible high polymer nylon film is uniformly heated, slowly crystallizes in the skeleton of the flexible high polymer nylon film with the volatilization of the solvent, and the proportion of the perovskite is improved through secondary filling and secondary annealing. The peeling and separation of the perovskite from the flexible substrate during the bending process of the flexible metal-free perovskite thick film are prevented through a hot-pressing process. The method prepares an X-ray detector based on the flexible metal-free perovskite filling thick film, obtains the flexible metal-free perovskite X-ray detector, provides a new idea for the application of the next generation of wearable electronic products, and promotes the development of large-area, flexible and metal-free perovskite X-ray detector devices.