319results about How to "Less variety" patented technology

The present invention discloses one kind of urea-formaldehyde foam as plant cultivating matrix and its preparation process. The urea-formaldehyde foam as plant cultivating matrix is prepared through the following steps: 1. mixing formaldehyde and urea to produce polycondensation reaction to obtain urea-formaldehyde resin solution; 2. mixing sodium butyl naphthalenesulfonate to obtain foaming liquid; 3. foaming the urea-formaldehyde resin solution with the foaming liquid in a foaming machine to obtain liquid foam; 4. solidifying the liquid foam and drying to operate foamed matrix; and 5. eliminating aldehyde group from the matrix to obtain urea-formaldehyde foam as plant cultivating matrix. The preparation process is simple and low in cost, and the prepared urea-formaldehyde foam as plant cultivating matrix has penetrating porous structure, high hydroscopicity and high soil-less culturing character.

In this invention, oxime is used as raw material being hydrolyzed in acid solution. Said hydrolytic process is coupled with osmotic vaporization membrane separation technique. The produced organic by-product ketone is removed by said membrane directionally and high efficiently. Thus recovers the limitation of the reaction chemical equilibrium of the hydrolysis, proceeding the reaction to the direction of production of hydroxylamine salts. This technique enhances the conversion rate greatly with high yield of hydroxylamine salts. This inventive method is better than prior art method with advantages of: simple process, less kinds of raw materials being needed, easy to operation, no side reaction, mild reaction condition and high yield of hydroxylamine salts being up to 80%.

The invention discloses a method for preparing nanoscale sheet cerium oxide by a hydrothermal method. The method comprises the following steps of: 1) preparing a 0.01-0.05mol/L Ce<3+> ion aqueous liquor at room temperature; preparing an ammonia water liquor at room temperature, wherein pH value of the ammonia water liquor is greater than 11; 2) placing the ammonia water liquor in a reaction kettle in a temperature range from -10 DEG C to 20 DEG C, taking the Ce<3+> ion aqueous liquor, and slowly dropping to excessive ammonia water liquor while stirring; and 3) stirring the mixed liquor obtained in the step (2) at constant temperature for reacting for 2-24 hours, centrifugalizing after reaction, removing the supernatant liquid, washing the powder obtained by centrifugalization and drying to obtain the solid sheet cerium oxide. According to the method disclosed by the invention, the nanoscale sheet cerium oxide is synthesized by one step by the hydrothermal method. The method is simple in preparation process, and low in demand on production and process conditions. No template materials are required and no organic solvents are added. The method is basically free from pollution and very environmental-friendly.

The invention provides a method for preparing chlorinated-2-acetyl-1,10-phenanthroline amine iron (II) complex with the structural formula of formula (I) and an application of the obtained complex as an ethylene oligomerization catalyst, wherein variables in the formula (I) are defined in the specification. According to the method, triethyl aluminum which is adopted as an initial raw material in the process of the preparation of 2-acetyl-1,10-phenanthroline from 1,10-phenanthroline is hydrolyzed and undergoes an oxidation reaction with nitrobenzene to obtain 2-acetyl-1,10-phenanthroline, 2-acetyl-1,10-phenanthroline is condensed with substituted aniline to obtain a 2-acetyl-1,10-phenanthroline amine ligand, and the ligand is reacted with iron dichloride to obtain the complex. The synthetic method of the invention, which has the advantages of less step, simple technology, and catalyst preparation cost reduction, and adopts nontoxic triethyl aluminum to replace potassium cyanide used in routine preparation methods, has a wide industrialization prospect.

The dispersed tablet of proton pump inhibitor is used for treating gastric ulcer, duodenal ulcer, stomal ulcer and other indications. It contains at least one kind of proton pump inhibitor and at least one kind of biologically acceptable buffering agent in the weight ratio of 1 to 10-200. The proton pump inhibitor is one selected from omeprazole, S-omeprazole, pantoprazole, lansoprazole, rabeprazole, leminoprazole, tenatoprazole and their salts. The biologically acceptable buffering agent is sodium bicarbonate, sodium carbonate, magnesium carbonate, etc or their mixture.

The invention provides a high-altitude long-span overhung cornice formwork supporting system. The system comprises an overhung I-shaped steel beam, an overhung I-shaped steel beam fixing hoop, an anchoring ring, a steel wire rope inhaul cable, an operating platform, an overhung structure load-bearing frame, an outer protecting scaffold, a cornice supporting formwork and a secondary unloading assembly, wherein a pull ring, a vertical rod inserting-connection positioning part and steel angles are arranged on the overhung I-shaped steel beam, one end E of the overhung I-shaped steel beam is fixed to an architectural structure plane through the overhung I-shaped steel beam fixing hoop, the other end of the overhung I-shaped steel beam is tensioned with the steel wire rope inhaul cable, the secondary unloading assembly comprises an inclined-supporting steel tube and a pre-buried supporting point steel tube, and the secondary unloading assembly is used for performing secondary unloading on a cornice supporting formwork system. A constructing method of the high-altitude long-span overhung cornice formwork supporting system includes the steps of manufacturing the overhung I-shaped steel beam, arranging the pre-buried part, installing the overhung I-shaped steel beam, setting up the operating platform, the overhung structure load-bearing frame, the outer protecting scaffold and the cornice supporting formwork, installing the inclined-supporting steel tube and the like. The high-altitude long-span overhung cornice formwork supporting system is easy to construct and operate and convenient to detach, the construction period is shortened, and cost is saved.

A process for preparing zinc oxide nanotubes by hydrothermal decomposing and growth includes such steps as dripping concentrated ammonia water in the solution of zinc chloride while stirring, regulating pH=9-11, sealing, ultrasonic treating, putting a clean and electrically conductive substrate in the solution, sealing again, laying a side at 80-98 deg.C, natural cooling, ageing, taking the substrate, flushing with deionized water, and natural drying to obtain the zinc oxide nanotubes on the surface of substrate.

The invention relates to a method for preparing nano-silver powders or nano-gold powders. In a single cell, metallic silver or an gold electrode is processed through anodic oxidation, inert conducting material is used as a cathode, room-temperature ionic liquid containing silver salt or gold salt is used as electrolysing solution, the electrolysis is executed under direct current, and the nano-silver powders or the nano-gold powders are obtained around the cathode; wherein, the silver salt is AgBF4; the gold salt is Au (PPh3) Cl or Au (PPh3) Br; the room-temperature ionic liquid is one of [bmim]BF4, [bmim]PF6, [emim]BF4, and [hmim]BF4. In the method, the metallic silver or gold is used as a sacrificial anode, the nano-silver powders and the nano-gold powders can be produced directly through electrolysis, the technology is simple, the cost is low, and the method is suitable for industrialized production. The room-temperature ionic liquid is used as an electrolytic dissolvent, the ionic liquid performs a role of not only a dissolvent but also a dispersant and a stabilizing agent, and nano-metal is easy to obtain, compared with water solution; compared with organic solvent, the room-temperature ionic liquid is safer and more environment-protecting.

The invention discloses a supramolecular multi-copolymer type clean fracturing fluid. The supramolecular multi-copolymer type clean fracturing fluid comprises the following components in percentage by mass: 0.3-1.0% of supramolecular active polymer, 0.3-1.0% of cross-linking agent, 1-2% of KCL and 96-98% of water, wherein the molecular formula of the supramolecular active polymer is shown in the specification, R is C13-C21 straight chain or branched chain alkyl, n is an integer of 3-6 and p is an integer of 2-4. The fracturing fluid disclosed by the invention has the characteristics of high-temperature resistance, safety and environmental friendliness.

The invention discloses a method for preparing a bisphenol compound antioxidant product by using an organic acid catalyst. A closed reactor is adopted, water is used as reaction solvent, a liquid organic acid catalyst is selected as a catalyst, and the bisphenol compound antioxidant product is generated through the condensation reaction of dialkyl phenol and aliphatic aldehyde. The liquid organicacid catalyst is one or a mixture of more of long-chain alkyl benzene sulfonic acid, long-chain dialkyl benzene sulfonic acid, long-chain alkyl diphenyl ether disulfonic acid and long-chain dialkyl diphenyl ether disulfonic acid and aliphatic hydrocarbon of C6 to C10 or aromatic hydrocarbon of C6 to C8 in a mass ratio of 1: 0.1-1.0. The dosage of the liquid organic acid catalyst is 7 to 30 percent by mass of dialkyl phenol; the mass ratio of the water to the dialkyl phenol is 2-5:1; and the molar ratio of the aliphatic aldehyde to the dialkyl phenol is 0.45-0.60: 1. The reaction pressure is 0to 0.1MPa, the reaction temperature is 60 to 95 DEG C, and the reaction time is 4 to 7 hours. The raw material variety used by the method is reduced, and the production efficiency is improved; and the method avoids using sulfuric acid and hydrochloric acid with stronger corrosion on the equipment.

The invention discloses an LED plant-growth lamp with a continuous spectrum. The LED plant-growth lamp comprises an LED light source lamp bead group (namely a light source), a light source base board, a radiator and a driving power source matched with the light source, wherein the LED light source lamp bead group consists of warm white light LEDs and red light LEDs. The correlated color temperature of the warm white light LEDs is below 4000K, and each warm white light LED is formed by applying fluorescent powder on a blue light chip of which the wave length of emitted light is 420-490nm; the fluorescent powder is a mixture of YAG fluorescent powder which emits yellow light at peak and fluorescent powder which emits green light at peak wavelength; the green-light fluorescent powder accounts for 5%-30% of the total weight of the fluorescent powder; the wave length of the red light LEDs is within the range of 620-680nm. The LED plant-growth lamp disclosed by the invention has the technical effects that the wave length of light is within the range of 430-680nm, and the lamp has the continuous spectrum so that the requirements of plants for light with other wave lengths can be met; the light supplementing effect is good; the growth quality of plants is high. The LED plant-growth lamp saves energy and is low in production cost.

The invention relates to a method for preparing foamed ceramics based on nano-alumina, which comprises the following steps of: mixing nano-alumina particles, de-ionized water and short-chain amphipathic organic molecular solution, placing the mixture into a mill pot and grinding and stirring the mixture to form suspension with stable particles; taking the suspension out, adding a water insoluble organic solvent like a hydrocarbon material in a certain proportion into the suspension and completely stirring the mixture to form micro-emulsion with an oil-in-water structure; injecting the micro-emulsion into a prepared stainless steel mould and drying the micro-emulsion for 10 to 15 days to form a foamed sample; and sintering the foamed sample in a sintering furnace of 650 to 900 DEG C for 2 to 8 hours to mold the foamed sample, taking the molded foamed sample out of the stainless steel mould, and placing the molded foamed sample into a high-temperature sintering furnace of 1,350 to 1,600 DEG C for sintering for 2 to 8 hours to obtain the high-strength nano-alumina foamed ceramics. The method of the invention has the advantages of simple equipment and process, low energy consumption, raw materials which are large-scale industrial products and easy realization of large-scale industrial production. The product not only has the high-strength characteristic of fireproof bricks, but also has the advantages of the light weight and heat preservation of ceramic fibers.

A door closer is described, which has an output shaft, on which a cam disc is torsion-resistantly disposed, and has a pressure roller. By means of an operational connection, a closer spring presses the pressure roller against a running surface of the cam disc. In relation to an axial center of the output shaft, the pressure roller is disposed such that, during opening or closing of a swing leaf coupled to the output shaft, the pressure roller is movable along a path. Due to the fact that the path bypasses the axial center of the output shaft and on account of the configuration of the running surface of the cam disc, at a respective opening angle of the swing leaf, in different modes of operation of the door closer, a very similar or identical torque is respectively applied to the output shaft.

The invention discloses a method for measuring seawater chemical oxygen demand by photometry, wherein the seawater exemplar is first pre-processed, then using the basic potassium hypermanganate as reaction system, the potassium permanganate is deacidized quantitatively by organics to produce manganate, using pure water or margin solution as reference ratio, measuring the absorbance an of the manganate at its maximum absorbing wave length 430 nm, drafting the A-COD value operating curve, obtaining the concentration of the organics in the water, i.e. seawater COD value based on the photometric quantity of the operating curve. The method is easy and simple to operate and can reduce the environmental pollution, it is easy to accomplish the automation of the seawater COD measurement.

The invention provides a method for preparing nanometer cerium oxide. The invention adopts the following technical scheme that the method comprises the following steps: 1) preparing a Ce(NO3)3.6H2O aqueous solution with a concentration of 0.05-0.1 mol/L at room temperature; 2) taking a certain volume of the Ce(NO3)3.6H2O aqueous solution at room temperature, dropwisely adding undiluted commercially-available 25% ammonia water into the Ce(NO3)3.6H2O aqueous solution according to a volume ratio of 10:1-3; 3) allowing the mixed solution to react for 2-24 hours, after the reaction, performing centrifugation, removing the liquid at the upper level, washing the powder obtained after centrifugation, and drying to obtain solid powder. The invention realizes one-step synthesis of nanometer cerium oxide by a hydrothermal method; the preparation process is simple, and the requirements for production equipment and process conditions are low; no organic solvent is added, which is basically free of pollution, and is quite environment-friendly; no macromolecular surfactant is added, which prevents posttreatment process such as washing and the like; the kinds of the required raw materials are few, and when compared with traditional process, the method of the invention is quite low in production cost; the method cam prepare uniform and pure cerium oxide nanoparticles, cerium oxide nanorods, and mixtures of the above two.

The invention discloses a preparation method of spherical nanometer CeO2 polishing powder and belongs to the field of nanometer material research. The preparation method utilizes a crystal water-containing cerium salt and citric acid as raw materials, a proper amount of ethanol as a lubricant and the ball milling mechanical force to refine the raw materials so that reaction efficiency is improved. Crystal water released by the raw materials and the lubricant ethanol form a liquid film and precursor gel is directly prepared so that a ball milling solid-phase chemical reaction method and a sol-gel method are combined. The gel can effectively inhibit the agglomeration and growth of cerium oxide particles in later calcination processes so that the pherical nanometer CeO2 polishing powder with uniform particle sizes, good dispersibility and good polishability are prepared. The pherical nanometer CeO2 polishing powder has uniform particle sizes, good dispersibility and good polishability. The preparation method has the advantages of simple processes, high efficiency, no pollution and good reproducibility, and is suitable for industrial mass production.