22 results about "Cerous chloride" patented technology

The invention discloses polyacrylate anti-deposition and cerium chloride synergistic composite corrosion inhibitor cooling liquid, relates to the field of cooling liquid, and is particularly suitable for a multi-metal cooling system. According to the method, polyacrylate, cerium chloride, benzotriazole, benzimidazole, ethylene glycol, deionized water and triethanolamine serve as core raw materials, during preparation, equipment and the raw materials are pretreated, then a base solution is prepared, the pH value is adjusted to be alkalescent, then polyacrylate and cerium chloride are dissolved and coordinated, an auxiliary corrosion inhibitor is added, and synergistic protection is formed. And defoaming, filtering and filling. The cooling liquid adapts to multi-metal material protection through the synergistic effect of deposition resistance of polyacrylate and corrosion inhibition and synergism of cerium chloride, the cooling liquid is diluted according to working conditions during application, waste cooling liquid is discharged after being subjected to combined treatment of biological contact oxidation and Fenton oxidation, a finished product needs to be stored in a proper environment in a sealed mode, and the protection performance, the environmental protection property and the storage stability are effectively considered.

The application discloses a preparation method of a carbon-loaded CeNCl catalyst and application thereof, and belongs to the field of catalysts. The preparation method comprises the following steps: mixing cerium chloride and chitosan, and performing ball milling treatment to obtain pretreated materials; and performing calcination treatment on the pretreated materials in an N2 atmosphere, and naturally cooling after the calcination treatment is completed to obtain the carbon-loaded CeNCl catalyst. The catalyst preparation process is simple, time-consuming is short, and mass production and industrial application can be realized. The catalyst after a catalytic reaction is easy to separate and recycle. The catalyst preparation raw materials are widely sourced and cheap. The catalyst has excellent catalytic performance and can obtain a yield close to 100%.

The present application relates to a kind of micro CO efficient removal adsorbent and its preparation and application, the preparation method includes the following steps: (1) active carbon powder, active component A, inorganic clay and dispersing agent are placed in ball mill and are uniformly ground, and mixture material is obtained;(2) active component B and the water solution of reducing agent are atomized and sprayed into the mixture material, then glue is added, and wet material is obtained;(3) wet material is extruded into shape by template, after heat reduction, after drying, calcination, CO removal adsorbent is obtained, i.e. target product;Active component A is monovalent copper salt, and active component B is the mixture of lanthanum chloride and at least one of cerium chloride or yttrium chloride.The strength and adsorption capacity of the CO removal adsorbent of the present application are increased by more than 30% and 25% respectively, the strength is ≥40N / cm, the wear is ≤1.5wt%, the CO adsorption capacity is ≥35ml / g (40℃), the removal precision can reach below 0.01ppm, suitable for the efficient purification of trace CO in hydrogen, nitrogen and other raw gas.

The application relates to a composite catalytic system for accelerating hydrogen production by magnesium hydride hydrolysis and a preparation method and application thereof, relates to the technical field of hydrogen production by magnesium hydride hydrolysis, and solves the problem that the existing hydrogen production by magnesium hydride hydrolysis reaction has large mass transfer resistance in the later stage and it is difficult to realize rapid and complete conversion of MgH2 under mild conditions. The composite catalytic system is composed of independently mechanically ball-milled pre-activated magnesium hydride powder and cerium chloride powder. In an inert atmosphere, the magnesium hydride powder is independently mechanically ball-milled for pretreatment to obtain activated magnesium hydride powder; the activated magnesium hydride powder and the cerium chloride powder are uniformly mixed according to a set molar ratio to obtain a cerium-based composite catalytic system. The above cerium-based composite catalytic system is added into water to initiate a hydrolysis reaction for hydrogen production at 20-60 DEG C. The catalytic system can stably meet the rapid gas production demand of a portable hydrogen supply device, has catalytic efficiency and cost advantages, and is suitable for large-scale application in actual scenes.

This disclosure relates to a hydrosilylation-curable organopolysiloxane composition which contains an organopolysiloxane and an organohydrogenpolysiloxane crosslinked via a hydrosilylation reaction, a non-reactive organopolysiloxane resin which exhibits a mass loss rate of 2.0 mass % or less when exposed to 200° C. for 1 hour, and optionally a reaction product of an alkali metal silanolate and at least one or more cerium chlorides and / or carboxylates. The composition has a low elastic modulus and low stress, and has excellent strength, cold resistance, and transparency. Furthermore, the addition of a cerium compound allows these characteristics to be maintained even under high temperature conditions for a long period of time, and provides a cured product that is resistant to cracking, peeling, and the like, particularly when a strong temperature gradient occurs inside the composition.

The invention discloses a composite material as well as a synthesis method and application thereof. The composite material comprises cerium chloride nitrogen and carbon. The synthesis method of the composite material comprises the following steps: mixing chloromethyl resin with a first solvent, adding a nitrogen-containing organic compound for reaction, and drying to obtain modified chloromethyl resin; adding a cerium precursor and a second solvent into the modified chloromethyl resin under heating and stirring conditions, mixing, drying, and roasting in an inert gas atmosphere to obtain the composite material. The composite material disclosed by the invention can be applied to transesterification and shows good catalytic performance.

This invention relates to the field of wastewater treatment, specifically to a water treatment agent for synergistic removal of fluoride and heavy metals and its preparation method. By weight, it comprises the following raw materials: 100 parts water, 10-30 parts aluminum-based flocculant, 0.5-3 parts citric acid, 2-10 parts modified montmorillonite, 1-3 parts cerium chloride heptahydrate, 1-8 parts calcium chloride, 1-3 parts soluble zirconium salt, 2-4 parts thiolated chitosan, and 2-3 parts stabilizer. Through the synergistic effect of the aluminum-based flocculant, organic ligand, modified montmorillonite, polymetallic salt, and thiolated chitosan, it achieves efficient, deep, and simultaneous removal of fluoride ions and various heavy metal ions from wastewater, exhibiting high removal efficiency and good stability.

The application belongs to the technical field of medical organic synthesis, and particularly relates to a preparation method of an oxazole ester compound. The oxazole ester compound is prepared by using N-ethoxyoxalyl-alpha-alanine ethyl ester (oxalate) as a starting material, adding a catalytic amount of rare earth cerium trichloride as a catalyst under the action of triphenylphosphine dichloride and an organic base, and promoting a chloro-cycloaddition reaction by using a rare earth coordination effect. The obtained oxazole ester can be further subjected to saponification and decarboxylation to obtain a vitamin B6 intermediate 4-methyl-5-ethyloxazole. The reaction rate is significantly accelerated and the reaction yield is improved by using the coordination effect of the rare earth cerium trichloride, the amount of the cerium trichloride is as low as 0.003%, and the cerium trichloride is easy to recover. The process does not need to use imidazole compounds as a catalyst, and the problem of difficult recovery of imidazole is avoided. The process is green, environmentally friendly, safe, simple and convenient to operate, the yield and purity of the target product are high, and the process is suitable for industrial production.

This invention discloses a palladium-based bimetallic ene catalytic material modified with polyaniline molecules, its preparation method, and its application. The preparation method includes the following steps: preparing a DMF solution of potassium palladium chloride and cerium chloride; preparing a mixed solution of KOH, DMF, and EG; adding the potassium palladium chloride and cerium chloride solutions dropwise into the mixed solution, then adding polyaniline molecules, followed by DETA; placing the mixed solution into a stainless steel high-pressure reactor lined with Teflon for hydrothermal reaction; after the reaction, cooling to room temperature, centrifuging, washing, and drying to obtain the palladium-based bimetallic ene catalytic material. The raw materials used in this invention are inexpensive and readily available. The prepared material, when used as the negative electrode of a proton exchange membrane fuel cell, exhibits a high power density. This method is simple, cost-effective, easy to operate, and can be mass-produced.

This invention belongs to the field of coating technology, specifically relating to a durable anti-corrosion coating, its preparation method, and its application in bridge steel structures. In preparing the durable anti-corrosion coating, this invention first reacts magnesium nitrate hexahydrate with ZIF-67 to obtain LDH nanoparticles, and then loads them with a 2-mercaptobenzimidazole corrosion inhibitor to obtain corrosion-inhibiting LDH nanoparticles. Pyrrole and dopamine are then subjected to in-situ oxidative polymerization on the surface of the corrosion-inhibiting LDH nanoparticles to obtain a corrosion-inhibiting active filler. Next, tetramethyldihydrodisiloxane, octamethylcyclotetrasiloxane, and trifluoropropylmethylcyclotrisiloxane are used as monomers to synthesize polysiloxane intermediates, and cerium chloride and allylamine are introduced to obtain an anti-UV polysiloxane curing agent. Finally, epoxy resin, the anti-UV polysiloxane curing agent, and the corrosion-inhibiting active filler are mixed and vacuum degassed to obtain the durable anti-corrosion coating. The coating prepared by this invention exhibits excellent anti-corrosion performance, durability, and mechanical properties.

The invention relates to the technical field of metal material manufacturing, in particular to a preparation method of rare earth cerium and cerium dioxide coated graphene synergistically enhanced aluminum alloy, which comprises the following steps: step 1, dispersing graphene oxide in deionized water, and carrying out ultrasonic oscillation to obtain uniformly dispersed graphene oxide suspension liquid; the preparation method comprises the following steps: adding cerium chloride heptahydrate and a surfactant hexadecyl trimethyl ammonium bromide into a dispersion liquid of graphene oxide, uniformly stirring a mixed solution, and dropwise adding a sodium hydroxide solution to adjust the pH value of the solution; the cerium dioxide coated graphene is creatively combined with the added cerium element, cerium dioxide on the surface of the graphene and an aluminum melt are subjected to an in-situ reaction, and a transition layer is formed at an interface to enhance combination between the graphene and an aluminum matrix and inhibit generation of a brittle phase Al4C3; meanwhile, the cerium element in the aluminum melt and the cerium released by the interface reaction jointly achieve the effects of grain refinement and dispersion strengthening.

The invention belongs to the technical field of nano materials and biological catalysis, and particularly relates to a preparation method of cerium atom doped palladium particle nano enzyme. The method comprises the following steps: uniformly mixing palladium chloride and cerium chloride which are used as metal precursors, phloroglucinol which is used as a reducing agent and a mixed solution of oleylamine and octadecene which is used as a solvent and a dispersion medium, carrying out high-temperature reaction in a closed reaction kettle, and centrifuging, washing and drying a reaction product to obtain the Ce atom-doped Pd nano-particles with waxberry-shaped morphology. According to the invention, Ce is embedded into a Pd lattice in an atomic-scale dispersion form, and most of Ce is located at the junction of the Pd (111) and Pd (100) crystal faces to form a d-f orbital hybrid structure, so that the electron transfer ability of the material is significantly enhanced. The prepared nano-enzyme has excellent catalase-like activity and oxygenase-like activity at the same time under the weak acid condition, the activity of the two enzymes can be efficiently cascaded, and the catalytic activity is remarkably improved compared with that of the nano-enzyme without Pd doping.

The invention relates to a preparation method of anhydrous cerium chloride, which comprises the following steps: performing multi-stage heating dehydration treatment on a cerium chloride hydrate under a vacuum condition to obtain the anhydrous cerium chloride, wherein in two adjacent stages of heating dehydration treatment, the vacuum degree of the next stage of heating dehydration treatment is 50-2000Pa lower than that of the previous stage of heating dehydration treatment, and the temperature of the next stage of heating dehydration treatment is 10-115 DEG C higher than that of the previous stage of heating dehydration treatment. According to the method, free water, crystal water and hydroxyl water are gradually stripped in an environment without adding chemical reagents, the hydrolysis side reaction is inhibited in the whole process, the prepared anhydrous cerium chloride water is small in oxygen residue and low in impurity content, and the purity of the anhydrous cerium chloride is improved.

The invention discloses a preparation method of an adsorbent for removing heavy metals in municipal sludge. The method comprises the synthesis and modification processes of the adsorbent. The preparation method comprises the following steps: firstly, preparing an adsorbent precursor, preparing a mixed solution according to the ratio of a calcium source to a silicon source to sodium hydroxide to water being 4: (5-6): (11-40): (72-175), then transferring the obtained mixed solution into a hydrothermal reaction kettle with a polytetrafluoroethylene lining, and reacting for 10-12 hours under the conditions of 180-190 DEG C and 0.8-1.0 MPa; after the reaction is finished, washing, drying and grinding to obtain an adsorbent precursor; and then preparing the heavy metal adsorbent: mixing cerium chloride and water according to a mass ratio of 1: (30-50), and stirring for 30-60 minutes in a room temperature environment. The mass ratio of the adsorbent precursor to the cerium chloride solution is 1: (20-25), stirring at room temperature for 2-4 hours, standing for 1-2 hours, alternately washing with ethanol and deionized water for 3-5 times, and finally drying to obtain the adsorbent. The prepared adsorbent can be used for removing the heavy metals in the municipal sludge, the amount ratio of the adsorbent to the municipal sludge is 1: (200-250) when the adsorbent is used, and the highest value of the removal efficiency of each group after the reaction is carried out for 50-70 minutes at the temperature of 25-50 DEG C reaches 90% or above. The method effectively improves the removal effect of the heavy metals in the municipal sludge, and provides a solution for reducing the content of the heavy metals in the municipal sludge.

The present disclosure relates to the technical field of diamond powder compaction sintering, and provides a high-strength diamond saw blade and a preparation device and method thereof, the diamond saw blade comprising a base body and a blade head, the blade head comprising a first cutting zone and a second cutting zone, the first cutting zone being located between the second cutting zone and the base body, and the particle size of the first cutting zone being greater than that of the second cutting zone; the material mass percentage of the first cutting zone and the second cutting zone comprising a binder raw material and diamond, the binder raw material comprising cerium chloride 0.1%-0.5%, copper 25%-35%, iron 35%-45%, tin 7%-10%, nickel 5%-10%, alloy powder 10%-15%, and the rest being diamond. Thus, the first cutting zone with a larger particle size is used for cutting under the opening of the second cutting zone, which helps to reduce the situation of edge explosion after the diamond saw blade cuts hard stone such as ceramic or granite, thereby improving the applicability of the diamond saw blade.

The invention discloses a synthesis process of dapagliflozin. The method comprises the following steps: (1) preparing a Grignard reagent THF solution of 1-chloro-2-(4-ethoxybenzyl)-4 iodobenzene; (2) preparing 2, 3, 4, 6-tetra-O-acetyl-alpha-D-glucopyranosyl bromide; (3) in the presence of a catalyst containing anhydrous cerium chloride and titanium tetraisopropoxide, carrying out coupled reaction on the Grignard reagent THF solution obtained in the step (1) and the 2, 3, 4, 6-tetra-O-acetyl-alpha-D-glucopyranose bromide obtained in the step (2) at the temperature of-15 to-10 DEG C to obtain an acetylated dapagliflozin intermediate; and (4) carrying out deprotection reaction on the acetylated dapagliflozin intermediate obtained in the step (3) to obtain the dapagliflozin. Under a composite catalytic system, the reaction shows excellent stereoselectivity, the required beta-configuration C-glycoside product is specifically generated, and the generation of by-products such as alpha-isomers and the like is effectively inhibited.

The invention discloses electronic-grade ceric ammonium nitrate and an industrial production method thereof. The production method comprises the following steps: receiving cerium chloride feed liquid from a rare earth extraction production process; adding ammonia water into the cerium chloride feed liquid to obtain a purified solution; diluting the purified solution with pure water to obtain a diluted solution; adding hydrogen peroxide into the diluted solution and applying an electric field; ammonia water is sprayed in a variable manner and added into the diluted solution, and a reaction solution containing cerium hydroxide is obtained under the reaction condition; solid cerium hydroxide is separated from the reaction solution; adding the obtained solid cerium hydroxide into concentrated nitric acid, and reacting to obtain a cerium nitrate solution; the method comprises the following steps: adding ammonium nitrate into a cerium nitrate solution, evaporating and crystallizing until crystallization begins, and slowly standing and crystallizing at normal temperature until no crystal is generated in a crystallized solution; and separating crystals from the crystallization solution to obtain ceric ammonium nitrate. According to the method, a compact process route is adopted, and the electronic-grade ceric ammonium nitrate is prepared while the yield is increased and the production cost is minimized.

The invention relates to the technical field of crude oil catalysis technologies, and provides a CeO2-graphite carbon composite material and a preparation method and application thereof, and the CeO2-graphite carbon composite material is composed of nanometer CeO2 and graphene or carbon nanotubes growing on the surface of the nanometer CeO2; the nano CeO2 is prepared from cerium chloride heptahydrate, urea and sodium hydroxide through a hydrothermal reaction; graphene or carbon nanotubes grow on the surface of nano CeO2 through a chemical vapor deposition method by taking ethanol as a carbon source and blowing and heating argon, the prepared CeO2 can reach 30-90nm, is narrow in size distribution and is spherical, the graphene or carbon nanotubes directly grow on the surface of CeO2, and the graphene or carbon nanotubes and the CeO2 are tightly combined, so that the dispersibility and catalytic activity of CeO2 are improved, and the preparation method is simple and easy to implement. The viscosity of thickened oil can be obviously reduced when the catalyst is applied to thickened oil hydrothermal cracking.

The invention provides a corrosion-resistant coating for a heat exchanger tube in a high-temperature chloride molten salt environment and a preparation method thereof, and the preparation method comprises the following steps: mixing, stirring and drying aluminum powder, aluminum chloride powder, yttrium chloride powder and cerium chloride powder to obtain a mixture 1; mixing the mixture 1 with chloride mixed salt to obtain a mixture 2; and in the inert gas environment, the mixture 2 is heated to be in a liquid state, the liquid mixture 2 wraps the surface of the heat exchanger, an anti-corrosion coating is generated on the surface of the heat exchanger tube under the heat preservation condition, and the anti-corrosion coating comprises, by mass, 10%-20% of aluminum, 1%-4% of chromium, 0.5%-2% of nickel, 0.02%-0.1% of a cerium-yttrium mixture and the balance iron. The corrosion-resistant coating on the surface of the heat exchanger tube is prepared during molten salt flowing, so that the corrosion resistance of the heat exchanger tube is improved by more than 10 times, and the problem of strong corrosion of an alloy material under high-temperature molten chlorate in next-generation solar thermal power generation is solved.

The invention relates to a synthesis method of (9R, 10S)-2-chloro-9, 10-bis (4-methoxyphenyl)-9, 10-dihydroanthracene-9, 10-diol, and particularly relates to a synthesis method of (9R, 10S)-2-chloro-9, 10-bis (4-methoxyphenyl)-9, 10-dihydroanthracene-9 The synthesis method comprises the following steps: by taking tetrahydrofuran as a solvent, adding cerium trichloride as a catalyst and an exchange system atmosphere as an inert atmosphere, and regulating and controlling a temperature value to activate cerium trichloride so as to obtain cerium trichloride dispersion liquid; under the condition of 10-20 DEG C, adding a Grignard reagent into the cerium trichloride dispersion liquid to be complexed with cerium trichloride to obtain a mixed solution; the Grignard reagent is tetrahydrofuran dispersion liquid of p-methoxyphenyl magnesium bromide; the preparation method comprises the following steps: adding tetrahydrofuran dispersion liquid of 2-chloroanthraquinone into a mixed solution under the condition of 10-20 DEG C, carrying out a reaction, and after the reaction is finished, carrying out quenching and post-treatment to remove impurities, so as to obtain (9R, 10S)-2-chloro-9, 10-bis (4-methoxyphenyl)-9, 10-dihydroanthracene-9, 10-diol, namely (9R, 10S)-2-chloro-9, 10-bis (4-methoxyphenyl)-9, 10-dihydroanthracene-9, 10-diol. According to the synthesis method, raw materials are easy to obtain, and the yield is high and can reach 55% or above.

The invention relates to the field of soil nutrients, in particular to a microdomain activator, anthocyanin black corn and anthocyanin drinking water. The microdomain activating agent is prepared from the following raw materials in parts by weight: 3 to 8 parts of cerium chloride, 2 to 7 parts of methyl jasmonate, 5 to 10 parts of ferulic acid, 5 to 10 parts of gallic acid, 40 to 60 parts of acidified humic acid, 15 to 25 parts of seaweed extract and 5 to 10 parts of potassium silicate. The anthocyanin black corn is obtained by applying the microdomain activator to the rhizosphere in the seeding and jointing booting stages of the black corn. Through multi-target and multi-layer precise regulation and control, a large amount of photosynthetic products are directionally converted into procyanidine in a key growth period of plants and stored in corncobs, and finally, the procyanidine dry basis content is improved in a breakthrough manner.