229results about How to "The reaction equipment is simple" patented technology

The invention relates to a boiling bed hydrogenation catalyst and a preparation method. The boiling bed hydrogenation catalyst of the invention is spherical shape which diameter is 0.1mm to 0.8mm, and has appropriate amount of additives and hydrogenation of metal components, and has reasonable hole distribution. The catalyst preparation method of the invention is spherical carrier impregnation, the process of spherical carrier preparation is following: making catalyst carrier raw material which is in appropriate temperature into appropriate size grain, then spheroidizing the grain, heating the conglobation and making them into spherical catalyst carrier. The process for making the catalyst carrier raw material into the appropriate size grain is that wet stock passes screen stencil by mechanical action and generates grain. Between the processes of the making grain and nodularization, granular material primely is placed for a period of time or operates in low-speed in nodularization device for a period of time. The catalyst of the invention appropriately conducts the boiling bed hydrogenation for heavy oil, residual oil.

The invention discloses a catalyst system for preparing vinyl chloride by hydrochlorinating acetylene, and preparation and application thereof. The catalyst system comprises a catalyst carrier and a catalyst, wherein the catalyst carrier is pyridine ionic liquid, and the catalyst is one or any combination of more than two of tin, palladium, gold, copper, manganese, bismuth, mercury and rhodium. The preparation method for the catalyst system comprises a step of dissolving the catalyst in the catalyst carrier. Acetylene gas and hydrogen chloride gas are mixed and then reacted in the presence of the catalyst system. The preparation process realizes a liquid phase reaction for preparing the vinyl chloride by hydrochlorinating the acetylene, avoids the loss of the catalyst system, is more environment-friendly and safer, and improves the conversion rate of the acetylene and the selectivity of the vinyl chloride.

The invention provides a method for preparing a high-specific-surface-area porous graphitic nanocarbon plate with coconut shells serving as raw materials, and relates to a preparation method of a graphitic nanocarbon material, and the method is used for solving the problems of conventional preparation method of the graphitic nanocarbon material that the production cost is high, the process is complex, the safety is poor, the output is low, the industrialization is hard to realize, and the prepared graphitic nanocarbon material is low in specific surface area and poor in graphitic degree. The preparation method comprises the following steps: 1, preprocessing the raw materials; 2, coordinating the raw materials with catalysts and activating agents; 3, curing the coordination compound; 4, thermally treating under an inert gas condition; and 5, carrying out acid leaching, washing by distilled water, and drying, so as to obtain the high-specific-surface-area porous graphitic nanocarbon plate. The porous graphitic nanocarbon plate prepared by the method provided by the invention is high in specific surface area, high in graphitic degree and excellent in electrochemical performance; the method is simple, low in energy consumption, high in safety, and suitable for industrial production; and a scientific way is provided for realizing the resource utilization of biological wastes like the coconut shells.

The present invention discloses a class of isocoumarin derivatives, which have the following general formula, wherein R is selected from hydrogen atom, C1-C10 alkyl, halogen, carbonyl, hydroxyl, nitrile, ester, alkoxy or trifluoromethoxyl, and E1 or E2 is selected from C1-C6 alkyl formate, phenyl or nitrile. The present invention further discloses a synthesis method of the isocoumarin derivatives. According to the present invention, divalent copper is adopted as a catalyst, a simple and easily-available o-halogenated benzoic acid and an alkyne compound are adopted as starting raw materials to synthesize an isocoumarin compound and derivatives thereof, and advantages of low cost, high yield, simple operation, easily-available raw materials, simple reaction equipment, easy industrial production, and the like are provided.

The invention discloses a polyamide/graphite composite material with high conduction performance and a preparation method thereof. The composite material consists of a polyamide substrate and nanometer graphite and is prepared through in-situ polymerization. The nanometer graphite has high diameter-to-thickness ratio; and an effective conduction network can be formed in a polymer by using little nanometer graphite. With the low content of a conduction filling of the nanometer graphite, a conduction polymer material keeps original good mechanical performance. The volume conductivity of the polyamide/graphite composite material with high conduction performance can reach 8*10S/cm; and compared with a conventional natural graphite and expanded graphite conductive composite material, the polyamide/graphite composite material has excellent properties of low filling amount and high conductivity.

The invention relates to a method and a device for preparing a continuous transparent conductive carbon nanotube film. In the device, a water tank is connected with a quartz tube in a tubular furnacevia water seal chemical vapor reaction; a spindle shaft of a spindle film is installed on a seal water surface and rotates driven by a motor; the spindle shaft and the motor can be mounted in a smalltrough or on a bracket of the water surface; the mixed solution of ethanol, ferrocene and thiofuran are injected in a carrier gasflow of H2 with the speed of 200-4000ml/min to react at a high temperature of 900-1600 DEG C; the tubular continuous carbon nanotube film synthesized by reaction is spinned by the spindle shaft, and the spinned carbon nanotube film can be resolved; the size of the carbontube film is correlated to the size of the reactor, and the size of the carbon tube film can be adjusted by adjusting the reaction parameter as for special reactors; and the continuous transparent conductive carbon nanotube film of different structures can be prepared by altering the chemical mixture ratio of the reacted solution. The invention ensures that the continuous transparent conductive carbon nanotube film can be prepared in one step, has high preparation efficiency and simple reaction devices, and is suitable for large-scale production of carbon nanotube films.

The invention discloses a preparation method for electrolyte used for a vanadium flow cell. The preparation method comprises the steps of dissolving high-purity vanadium pentoxide into concentrated sulfuric acid to activate the vanadium pentoxide, dissolving the obtained (VO2) 2 SO4 through deionized water, obtaining catholyte, pouring the catholyte into a cathode cavity of an electrolytic bath with a membrane, pouring a sulphuric acid water solution into an anode cavity of the electrolytic bath, placing electrodes, carrying out electrolytic reduction, and obtaining the electrolyte. The electrolyte comprises divalent, trivalent or quadrivalent vanadium ions, or comprises divalent and trivalent vanadium ions, or comprises trivalent and quadrivalent vanadium ions. The preparation method for the electrolyte used for the vanadium flow cell is capable of obtaining the high-purity electrolyte used for the vanadium flow cell, and has the advantages of being simple in technical process, simple in reaction device, easy to operate, few in variety of required raw materials, low in cost, capable of being used for large-scale industrial production, free of environmental pollution and the like.

The invention discloses a method for preparing a polycarboxylic acid water reducer intermediate, namely the method for preparing polyethylene glycol monomethyl ether methacrylate or polyethylene glycol monomethyl ether acrylate, in particular the method for preparing a polycarboxylic acid water reducer macromer. The method for preparing the polycarboxylic acid water reducer macromer comprises the following steps of: putting polyethylene glycol monomethyl ether, methacrylic acid or acrylic acid into a reaction kettle; adding a polymerization inhibitor and a catalyst into the reaction kettle, stirring and heating the mixture; raising the temperature of esterificatin reaction, then introducing inert gas into the reaction kettle, and keeping certain pressure in the reaction kettle; and then preserving the heat for hours to obtain the polyethylene glycol monomethyl ether methacrylate or the polyethylene glycol monomethyl ether acrylate. The invention mainly aims to provide the simple and fast method for preparing the polycarboxylic acid water reducer macromer so as to overcome the defects of the conventional production technique and process of the macromer.

An organosilicon compound containing carbonyloxyether bond is disclosed, which can be used to synthesize the organosilicon material containing carbonyloxyether bond and to modify the surface of meso-porous Si material. Its preparing process is also disclosed.

Belonging to the technical field of preparation and application of electronic ceramics, the invention relates to a preparation method of a perovskite-like varistor ceramic material CaCu3Ti4O12 (CCTO) with a high dielectric constant. With nitrates of Cu and Ca as well as Ti (OC4H9)4 as starting materials, the method of the invention combines a hydrothermal method for preparing nanometer CCTO powder so as to prepare high performance CCTO varistor ceramics, thus realizing the purposes of lowering temperature, and improving varistor as well as dielectric properties.

The invention relates to a method for synthesizing a carbyne nano-material from calcium carbide and polyhalohydrocarbon as raw materials through ball-milling and belongs to the field of preparation of novel carbon nano-materials. The method is characterized by comprising the steps: adding the calcium carbide and the polyhalohydrocarbon, which serve as the raw materials for preparing the carbon material, into a ball milling tank in one time or in a staged manner according to a certain ratio, and carrying out a ball-milling reaction for a certain time; and after the reaction ends, subjecting the product to acid washing, and performing water washing and drying, thereby obtaining the carbyne nano-material. According to the method, the reaction raw materials are cheap and readily available, the reaction conditions are mild, and the reaction equipment and process are simple. The produced carbon material is uniform in texture and excellent in physico-chemical properties and has a broad application prospect in the fields of energy, catalysis, environmental protection and the like.

The invention discloses a photoinduced controllable free radical polymerization method which uses ferric bromide as a catalyst and does not need ligand. The polymerization method comprises the following steps: composing a polymerization system from a monomer, an initiator, ferric bromide, a proper amount of reducing agent and a solvent in a certain mol ratio; and carrying out photoinduced polymerization under an anoxic or aerobic condition at room temperature. A polymer prepared by using the method has controllable activity. The method does not need ligand in the process of polymerization, has reduced polymerization substance components and is a low-cost active polymerization technology.

The invention provides a dissolvent thermal synthesis Method for preparation of maleic anhydride grafting ethene-octene copolymer, adding ethane-octene resin, maleic anhydride, initiator and monomer and dissolving them in solvent, controlling reaction temperature above the solvent's boiling point, carrying through reaction in the supercritical state of systerm, making ethene-octene contacts with reactant sufficiently, then washing and desiccation, getting the grafted copolymer of ethene-octene maleic anhydride. The getted maleic anhydride grafting ethene-octene copolymer is used as compatible reagent of ethene-octene and polycarbonate, polyester, nylon, polyurethane, polyvinyl chloride blending, viz. getting composite material of better combination property. This invention's method is simple, the grafting rate is high, the mass production is easy and the application foreground is wide.

The invention discloses a preparation method of an ether amphoteric polycarboxylic acid water reducing agent. According to the preparation method, based on the second-generation polycarboxylic acid water reducing agent, a novel ether amphoteric polycarboxylic acid water reducing agent is prepared by introducing a small number of amide polyamine units into a molecular structure of an ether polycarboxylic acid copolymer through two-step single reaction. Since the adsorption of the water reducing agent on the surfaces of cement particles can be improved by the amide polyamine units to a certain extent, the amide polyamine units have a plastic retaining effect in place of a short side chain; and thus, the slump retaining performance of a polyether water reducing agent is favorably improved, and the water reducing agent prepared by the process has low cost and stable performance to expand the application range of the polyether water reducing agent. The preparation method has the advantagesof simple reaction equipment, easiness for control, low cost and the like; and meanwhile, the prepared polycarboxylic acid water reducing agent has higher water reducing rate, superior workability and higher slump retaining property.

The invention relates to cadmium (II) coordination compound including 5-bromoniacin and a preparation method thereof. The chemical formula of the coordination compound is [Cd(L)2]infinite, wherein L is the deprotonated 5-bromoniacin anion ligand of carboxyl. The synthesis method of the coordination compound comprises the steps of: placing the cadmium (II) metal salt at the bottom layer of a glass test tube under the normal pressure and temperature, and adding distilled water for dissolution; adding the mixture of methanol and water thereupon as a buffer layer; adding a methanol solution of 5-bromoniacin ligand (HL) to the uppermost layer; and standing for a plurality of weeks to obtain the coordination compound of the invention. The coordination compound has good thermal stability, and the synthesis method thereof has the advantages of simple and convenient operation, high yield, good reproducibility, and the like. The invention is hopeful to be widely applied in the field of fluorescent crystal materials.

A preparation method of a super-sustained release ester-ether crosslinking polycarboxylic acid water reducer is provided. The method which combines synthesis of an ester water reducer and synthesis of an ether water reducer allows the polycarboxylic acid water reducer synthesized from large monomers containing different chain lengths and simultaneously containing long side chains and short side chains to be researched and developed, and the method which can guarantee good dispersity and good fluidity keeping ability brings conveniences for the concrete construction process. In the esterification reaction process, hydroxyethyl methacrylate is introduced to increase active hydroxy side chains, and the activity of methacrylic acid is effectively controlled, so the esterification rate of a reaction system is high, product performances are high, and the synthetic method of optimized ester polycarboxylic acid water reducer intermediates is researched and developed through utilizing above principles. A certain synergistic effect is reached by introducing high activity ester monomers in the copolymerization process and combining the long side chains and the short side chains of produced polycarboxylic acid, so performances of the ester-ether crosslinking polycarboxylic acid water reducer of the invention are better than the performances of common ester and ether polycarboxylic acids, and the water reducing rate and the fluidity keeping ability are improved.

The invention relates to a synthetic method of an alpha-hydroxyl carbonyl compound. The method is as below: mixing a carbonyl compound (I) with an organic phosphorus compound in an organic solvent; adding a catalyst cesium carbonate; and reacting under aerobic conditions to obtain the alpha-hydroxyl carbonyl compound (II). R1 is selected from the group consisting of hydrogen, alkyl, alkoxy, amino, aromatic base, substituted aromatic base and heterocyclic aromatic base; R2 is selected from alkyl, carbonyl, ester and phenyl; R3 is selected from alkyl, carbonyl, ester group and phenyl. Or, R1 combines with R2 to form naphthenic group or substituted cycloalkyl, benzo cycloalkyl base or substituted benzo cycloalkyl base, indole ring or substituted indole ring. Or, R2 combines with R3 to form the cycloalkyl or substituted cycloalkyl. The organic phosphorus compound is triphenylphosphine or triethyl phosphate. The organic solvent is dimethyl sulphoxide, N,N-dimethyl formamide, N,N-dimethyl acetamide or N-methyl pyrrolidone.

The present invention provides a thermal synthesis process for preparing grafted polyvinyl-maleic anhydride copolymer in solvent. It features that inside one high pressure reactor, polyethylene resin, maleic anhydride, dispersant, initiator and conjugated monomer are dissolved in solvent and reacted at certain temperature for certain period, and the product is then washed and dried to obtain grafted polyvinyl-maleic anhydride copolyer. The copolymer may be used as adhesive for composite polyethylene and metal pipe or plate; compatibilizer for polymer alloy to raise its compatibility and compatizier for polyethylene and inorganic communication material to raise the tensile strength without change in compact toughness. The process is simple, high in grafting rate and suitable for large-scale production.

The invention provides a solvent synthesis method of maleic anhydride graft styrene-butadiene -styrene, placing styrene-butadiene-styrene resin (SBS), maleic anhydride, initiator and comonomer in high pressure kettle to dissolve in solvent, reacting at a certain temperature and in a certain time, and then washing and drying to obtain SBS-maleic anhydride graft copolymer. It is simple, has high grafting rate and convenient for large-scale production. The prepared SBS-g-MAH is used in the compatilizer of the mixture of SBS with polycarbonate, polyester, nylon, polyurethane, polyvinyl chloride and so on.

The invention discloses a cheap and efficient synthesis method of an alpha-hydroxyketone compound. The synthesis method is characterized in that a carbonyl compound undergoes an oxidation hydroxylation reaction at 10-120DEG C under normal pressure with iodine simple substance, N-bromosuccimide, copper bromide, bromine simple substance, hydrogen bromide, N-iodosuccimide or hydrogen iodide as a catalyst, sulfoxide as an oxidant, water or sulfoxide as a hydroxy source and sulfoxide, ethyl acetate, N,N-dimethyl formamide, acetonitrile, toluene, 1,4-dioxane, 1,2-dichloroethane, tetrahydrofuran or H2O as a solvent, and converts into the alpha-hydroxyketone compound in a high selectivity manner. Compared with traditional synthesis methods, the method disclosed in the invention has the advantages of simple operation, high yield, simple conditions, easy purification, small waste discharge amount, simple reaction apparatus, and easy industrial production. The method has wide applicability and can be used for synthesizing various alpha-hydroxyketone compounds.

The invention provides fluorescent carbon dots, and a fused salt preparation method and application thereof. The fluorescent carbon dots have uniform particle size distribution; a main particle size is 2 to 4 nm and 85 to 98% of the carbon dots have a particle size of 2 to 4 nm; carbon dots with a particle size of 2 to 3 nm account for 50 to 82% of all the carbon dots; carbon dots with a particle size of 3 to 4 nm account for 15 to 40% of all the carbon dots; excitation wavelength is 340 to 440 nm, and emission wavelength dependent on the excitation wavelength is 470 to 700 nm. The fluorescent carbon dots have the advantages of high yield, low cost, simple preparation technology and good controllability of the sizes.

The invention discloses an N-quinolyl substituted beta-lactam compound as shown in a general formula (I), wherein R<1> and R<2> refer to mutually independent H or C1-12 straight-chain or branched-chain hydrocarbonyl, aryl, alkoxy, acyloxy or amino; R<3> refers to H or C1-25 straight-chain or branched-chain hydrocarbonyl or aryl, or R<3> together with R<1> or R<2> forms a substituted or non-substituted five-eight-membered ring containing or without containing heteroatoms, and the heteroatoms can be N, O and S; R<4> and R<5> refer to mutually independent H or C1-12 straight-chain or branched-chain hydrocarbonyl, aryl, alkoxy, acyloxy or amino, nitryl, sulfonyl and halogen, and halogen refers to F, Cl, Br and I. The invention also provides a synthetic method of the N-quinolyl substituted beta-lactam compound, a pharmaceutical composition containing the compound, as well as application of the compound in medicine preparation of beta-lactamase inhibitors.