31results about How to "Few control conditions" patented technology

The invention provides a method for preparing magnesium lithium alloy cerium salt and molybdate-phosphate-zirconium fluoride conversion coating, which comprises: subjecting the magnesium lithium alloy to degreasing, pickling and activating; performing conversion by cerium salt for 10 to 15 minutes in cerium salt conversion solution under conditions of a pH value of 3 to 4 and a temperature of 40 DEG C, and forming a layer of rare earth conversion coating on the surface of the magnesium lithium alloy; and immersing in molybdate-phosphate-zirconium fluoride conversion solution to perform conversion for 12 to 15 minutes under conditions of a pH value of 3.7 to 3.8 and a temperature of 50 to 55 DEG C. The method has better anticorrosion effect and is environment friendly; the bonding force between the conversion coating and the substrate is high; the color of the conversion film is uniform; the anticorrosion performance is high; and the obtained molybdate-phosphate-zirconium fluoride conversion solution has high recycling value and long service life and can be better reduce production and application cost.

The invention discloses an air conditioner and a cleaning control method thereof. The air conditioner comprises a filter screen, a dust removing brush, a dust collecting box and a filter screen support, wherein the dust removing brush makes contact with the surface of the filter screen on an annular moving rail to clean the filter screen on the annular moving rail, and the dust collecting box is located below the dust removing brush on the annular moving rail. The filter screen support on the annular moving rail is provided with the annular moving rail and a filter screen driving device for driving the filter screen on the annular moving rail to move. The filter screen can move circularly on the filter screen support so as to be automatically cleaned, and the whole cleaning control process is simple and not prone to mistakes.

The invention provides a synthetic method of cellulose derivatives having a long alkoxyl side chain. The method includes the steps of (1) with a triphosgene method, synthesizing phenyl isocynate having the long alkoxyl side chain on the basis of phenylamine and triphosgene; and (2) with microcrystal cellulose as a substrate, introducing the long alkoxyl side chain into a main chain of cellulose through esterification to synthesize the cellulose phenyl carbamate derivatives having a long alkoxyl side chain. The synthetic method is clear and available in route, is mature in technology, is simple in operation, is less in conditions required to control, is easy to achieve and can be used in large-scale batched production.

Based on the molecular formula of the material of positive electrode of the lithium ion battery, the proportioning materials are prepared. The mechanical ball milling method is utilized to mix the materials evenly. With the deionized water being added, the said dmixture is stirred up to obtain the solution of the materials. Spraying the prepared solution to the refrigerating medium in liquid state with being stired up obtains the refrigeration object. With being filtered, the refrigeration object is quickly moved to the desiccator, which is freezed by liquid nitrogen in advance, so as to obtain the predecessor in fine crystal caused by vacuum drying. Nano anode material of lithium ion battery is obtained by sintering the predecessor in 3-10 hours at 500-1000 deg.C.

The invention provides magnesium-lithium alloy molybdate and phosphate conversion solution and a method for forming a conversion coating. The magnesium-lithium alloy molybdate and phosphate conversion solution is prepared from sodium molybdate serving as main salt, monosodium phosphate serving as secondary main salt, citric acid serving as a coordinating agent, sodium fluoride serving as an accelerator, sodium nitrate serving as an accelerating agent, and glacial acetic acid serving as a pH regulator. By using the magnesium-lithium alloy molybdate and phosphate conversion solution to treat a magnesium-lithium alloy, the formed molybdate-phosphate coating has high surface coverage degree on the magnesium-lithium alloy, is uniform and dense, and greatly improves the corrosion resistance of the matrix. The magnesium-lithium alloy molybdate and phosphate conversion solution and the method for forming the conversion coating have the advantages of simple and practicable process, short coating time, low cost, little influence on fatigue property of the magnesium-lithium alloy, low requirement on matrix materials, and no influence of the matrix materials.

The invention relates to a normal-temperature and normal-pressure synthesizing method of a Zr-Si-C ceramic precursor. The normal-temperature and normal-pressure synthesizing method includes the steps of firstly, dissolving dimethyl zirconium dicyclopentadiene in an organic solvent under inert gas atmosphere protection, stirring, adding an organic lithium compound and a ligand compound, and drying to obtain active zirconium dicyclopentadiene lithium salt; secondly, dissolving the active zirconium dicyclopentadiene lithium salt with an organic solvent under inert gas atmosphere protection, stirring, adding halogenated silane monomer, performing polymerization reaction, dropwise adding a terminating agent to terminate the reaction, filtering, concentrating, purifying, and drying to obtain the Zr-Si-C ceramic precursor. The normal-temperature and normal-pressure synthesizing method has the advantages that conditions such as high temperature, low temperature, high pressure and energizing are not needed, the reaction can be performed under normal temperature and normal pressure, the dimethyl zirconium dicyclopentadiene high in activity and cheap and safe n-butyl lithium are used to have reaction with the halogenated silane monomer so as to prepare the Zr-Si-C ceramic precursor through a two-step method, and the preparation method is simple, scientific and reasonable; the Zr-Si-C ceramic precursor synthesized by the method is diversified and can be used for prepared various kinds of Zr-Si-C ceramics.

The invention discloses a preparation method of carbon-coated and doped lithium-iron phosphate, which is a synthetic process of reduction, oxidation and reduction crushing and comprises the following steps of: synthesizing a lithium-iron phosphate crude product by adopting a cheap iron sources, a phosphate-group source and a lithium source through high-temperature reduction, then crushing and refining large grains in the crude product through an oxidizing reaction, and finally obtaining a lithium-iron phosphate material with excellent electrochemical performance through heat processing and reduction after being mixed with a reduced carbon source. The large lithium-iron phosphate grains in the lithium-iron phosphate material prepared by the invention is refined, and the lithium-iron phosphate with uniform and fine grains is prepared from the refined grains through carbon-coated reduction; and because the grains of the raw material are small and are uniformly mixed, the grains can be converted into lithium-iron phosphate crystals with fine grains at a lower temperature.

The invention belongs to the technical field of production of metatitanic acid through titanium dioxide slurry, and particularly relates to a production method and equipment for producing metatitanic acid through titanium dioxide slurry.The production method for producing metatitanic acid through the titanium dioxide slurry is characterized by comprising the following steps of 1 diluting; 2 reacting by adding alkali; 3 reacting by adding acid; 4 water washing; 5 recycling; 6 spin-drying; 7 drying; 8 milling; 9 packaging.The production equipment for producing metatitanic acid through the titanium dioxide slurry is characterized by comprising reacting washing equipment (1), a supernatant liquor vertical flow sedimentation device (2), a delivery pump (3), a spin-drying device (4), a drying device (5) and a ball mill.According to the production method and equipment, few technological steps and few control conditions are needed, the equipment structure is simple, operation is convenient, reacting is complete, and the recycling rate and quality of metatitanic acid are guaranteed.

The invention provides a preparation method of a functional inorganic silicon-based chiral microsphere fixed-phase material based on amylose derivatives. The preparation method comprises the following steps: taking amylose as an initial raw material; simultaneously introducing 3,5-dimethylphenylcarbamate and a small amount of 3-(trimethylsiloxy)propyl carbamate in a sugar unit of the amylose; and synthesizing into amylose-tri(3,5-dimethylphenylcarbamate) derivatives containing a small amount of 3-(trimethylsiloxy)propyl groups . On that basis, the synthesized amylose derivatives are fully dissolved in tetrahydrofuran, the mixture and tetraethylortho silicate are subjected to crosslinking copolymerization by a sol-gel process, then the product is dispersed and aged in a sodium dodecyl sulfate aqueous solution, and finally, organic and inorganic hybridized silicon spheres with high content of the amylose derivatives are prepared. The surface of the obtained material is subjected to end sealing. The whole synthesis process is simple, mature and easy to control, the yield is high, and therefore, the preparation method can be used for large-scale batch production.

The invention relates to a controllable synthesis method of highly stereoregular polymethyl methacrylate. The method comprises the following steps that: 1, with amylose adopted as a matrix raw material and 3, 5-dimethylphenyl isocyanate as a derivatization reagent, a spiral polymer amylose-tri (3, 5-dimethylphenyl carbamate) is synthesized by a traditional esterification method; and step 2, the synthesized amylose-tri (3, 5-dimethylphenyl carbamate) obtained in the step 1 is added into a methyl methacrylate free radical polymerization reaction as an additive, the regular spiral structure of the synthesized amylose-tri (3, 5-dimethylphenyl carbamate) is used for inducing the free radical polymerization behavior of methyl methacrylate, and finally the highly stereoregular polymethyl methacrylate is prepared. The method of the invention is clear and feasible in synthetic route, is mature in process and simple in operation, requires few control conditions, is easy to realize and can be used for large-scale batch production.

The invention relates to a response surface optimization method for reducing the heavy metal content of crops in a biogas slurry returning mode, which comprises the following steps: selecting a plurality of test factors, and setting the gradient value of each test factor in each test based on the Box-Behnken principle of a response surface method; based on the set gradient value, carrying out potting tests on a plurality of biogas slurry returning crops, and collecting the heavy metal element content of the plants after the growth period of the crops ends; performing polynomial fitting based on test data by taking the heavy metal element content as a dependent variable and the gradient of each test factor as an independent variable to obtain a multiple regression model equation; and obtaining a response surface diagram based on the multiple regression model equation, and obtaining an optimal condition for minimizing the heavy metal content of the crops cultured in the biogas slurry. Compared with the prior art, the method has the advantages of flexibility, rapidness, convenience, low cost and the like, and an optimal solution can be provided for the problem of heavy metal accumulation of crops returning the biogas slurry to the field.

The invention discloses a tubular continuous production technology for generating six-membered heterocyclic compounds by means of dehydration cyclization, particularly N-((2Z)-piperazine-2-subunit)-2, 2, 2-trifluoroacetyl hydrazine (1) by taking 5-trifluoromethyl-2-chloromethyl methyl ether-1, 3, 4-NBD-F as a raw material in the presence of ethidene diamine. The channelized method for continuously producing 1 comprises the following steps of: firstly, putting methanol solution of ethidene diamine into one storage tank, putting the methanol solution of raw material NBD-F into the other storage tank, and keeping at a proper temperature T1; directly charging the methanol solution in the two storage tanks into a tubular reactor according to a certain proportion, and controlling the reaction temperature in the tubular reactor at T2, and the reaction time at t; and charging the obtained reaction liquid into a crystallization kettle to be cooled to separate out white solid. The synthesis technology provided by the invention has the advantages of being simple in device, good in technological safety, mild in reaction conditions, easy to control, continuous in production, environment-friendly, high in yield, stable in product quality and the like.