744 results about "Reaction timing" patented technology

An automatic playback overshoot correction system predicts the position in the program material where the user expects to be when the user stops the fast forward or reverse progression of the program material. The invention determines the position where the program material was stopped. The media controller transitions to the new mode that the user selected, starting at the stopped position with an overshoot correction factor added or subtracted from it. The invention adapts to the user by remembering how much the user corrects after he stops the fast forward or reverse mode. Correction factors are calculated using the user's corrections and adjusting the correction factors if the user continues to make corrections. The invention also uses a prediction method to correctly place the user within the program upon transition out of either mode and determines if the speed of the fast forward or reverse modes and then automatically subtracts or adds, respectively, a time multiple to the frame where the transition was detected and positions the user at the correct frame. The time multiple is fine tuned if the user is consistently correcting after the fast forward or rewind mode stops. Another method initially tests the user's reaction time using a test video and asks the user to press the fast forward or reverse button on his control device during the test video and then asks the user to position the video to the place that he expected the system to have been. This time span is then used whenever the user uses the fast forward or reverse modes and is adjusted with a multiple for each speed. A final method allows the user to simply set a sensitivity setting that the system will use as a correction factor and a multiple is subtracted or added to the release frame whenever the user uses the fast forward or reverse modes, respectively.

Disclosed herein is a dissolvable downhole tool. The tool includes, a dissolvable body constructed of at least two materials and at least one of the at least two materials is a reactive material, and a first material of the at least two materials being configured to substantially dissolve the dissolvable body and a second material configured to control reaction timing of the first material.

Methods and systems for the production of ethyl acetate are described herein. The methods and systems incorporate the novel use of a high shear device to promote dispersion and mixing of a carbonyl co-reactant (e.g. acetic acid, acetaldehyde) with ethanol. The high shear device may allow for lower reaction temperatures and pressures and may also reduce reaction time with existing catalysts.

In reagent reaction experiments using microplates, a desired period of time can be set for determining the time to introduce a reaction stop solution after introduction of a reagent. The set time is measured starting from the introduction of the reagent and the reaction stop solution is introduced immediately after expiration of the set time. A control device for an automatic liquid handling system having the above-described reaction time managing feature is also provided with a self-diagnosing function that is capable of determining whether scheduled processes are executable or not during the time set before execution of the processes and informing an operator of the results of determination.

The invention discloses a modulating method of LiFePO4 particle shape, which comprises the following steps: blending one or more composition with lithium ion, ferric ion and phosphate radical ion; adding solvent and certain quantity of crystal growing inhibitor; proceeding solvent heat reaction under certain temperature; washing; filtering; drying; sintering to improve crystallizing property; obtaining the product with regular shape and size.

A method for manufacturing 3-hydroxy-3-methylbutanoic acid (HMB) in commercially viable amounts is disclosed. The reaction mixture cycles through an external heat exchanger while the primary reactant is added in a warmer so as to control and maintain a low temperature for the reaction mixture. The manufacturing process herein disclosed increases yield while decreasing reaction time from the synthetic processes currently practiced.

A method for producing a cross-linked hyaluronic acid in accordance with the present invention comprises: (a) cross-linking at least one polymer at a temperature, from about 35° C. to about 60° C., for a reaction time of from about 0.1 hour to about 72 hours with a cross-linking agent; and (b) lowering the temperature in step (a) to form about 10° C. to about 30° C. for a reaction time of from about 48 hours to about 28 days to obtain the cross-linked hyaluronic acid, whereby, a cross-linking agent content in a product of the method can be decreased so the product does not require purification.

The invention discloses a preparation method of a novel hyperbranched triazine char forming agent, which comprises the following steps: adding a dissolved diamine solution at 0-10 DEG C, gradually and dropwisely adding a dispersed cyanuric chloride solution, and reacting for 1-4 hours; heating to 30-70 DEG C, adding an acid-binding agent, and reacting for 3-8 hours; heating to 90-150 DEG C, and reacting for 6-10 hours; and stopping stirring, carrying out vacuum filtration, washing with water, and drying to obtain the triazine hyperbranched char forming agent. Compared with the prior art, the invention has the advantages of continuous reaction process, short reaction time, cheap raw materials, low solvent consumption, no addition of any blocking agent in the reaction process, simplified synthesis technique, high heat stability and high char forming ratio.

The invention relates to a method for making a chitosan derivative. The method is characterized in that: firstly, the purified chitosan is activated by a strong base to form a hydroxyl-K type chitosan; secondly, a 1, 2-butyl oxide linkage is taken as an etherifying agent, an isopropanol is taken as a disperse phase, the reaction lasts 2 to 4 days moderately at room temperature; after the reaction is finished, 8 to 10 times volume of acetone is precipitated and washed to be neutral as well as is dried in vacuum at a temperature of 50 DEG C to obtain the white powder. The hydroxybutyl chitosan with different degrees of substitution is obtained by controlling the proportion of the chitosan and the 1, 2-butyl oxide linkage and the reaction time. The method has the advantages of good water-solubility and the existence of the temperature sensitivity at a physiological temperature.

The invention discloses a covalent organic framework material and a preparation method thereof and belongs to the technical field of preparation of covalent organic framework materials. Multiple covalent organic framework materials are quickly synthesized under a room temperature and an open system by utilizing ionothermal reaction, and include a Schiff-base type covalent organic framework material and a boric-acid type covalent organic framework material, and also include covalent organic framework materials with two-dimensional and three-dimensional structures. The synthetic method has the advantages of short reaction time, low energy consumption, no pollution of volatile organic matters, no additive, simple operation and the like. Ironic liquid can be reused for at least three times after being simply filtered and separated. The covalent organic framework material synthesized by the method has potential application in the aspects of gas storage and separation and the like because ofloading the ironic liquid.

The present invention discloses a three-phase ultrasonic photo-catalyzed reaction device and a CO₂ reducing method with the device. With the device, a photo-catalyst is placed in a photo-reactor, and the reactor is placed in a water bath of an ultrasonic generator. A light source is arranged above the photo-reactor. The method is that the CO₂ gas to be reduced is mixed evenly with the photo-catalyst and a sodium hydroxide solution in the photo-reactor under the ultrasonic action, and reacts for 3-20 hours with radiation of the light source. Then the CO₂ gas is reduced. The photo-catalyst is made from titanium dioxide or silicon dioxide and metal phthalocyanine. Metal phthalocyanine is supported on the surface of titanium dioxide in the way of in-situ synthesis, sol-gel, and immersion. The present invention promotes the photo-catalysis efficiency, reduces the reaction time, and saves the energy. Visible light can be used for reducing. Moreover, the phot-catalyst can be recycled, which reduces the pollution and the cost, sot the present invention is quite applicable for the three-phase ultrasonic photo-catalyzed reaction device and photo-catalyzed CO₂ reducing.

The invention discloses a preparation method for a triazine hyperbranched macromolecular carbon forming agent. The method is characterized by comprising the following steps: 1), mixing diamino or hydroxyl compound with non-protonic organic solvent, and adding catalyst in the atmosphere of inert gases; 2), dropwise adding cyanuric chloride non-protonic organic solution, and continuing the reaction at the temperature after finishing dropwise adding the cyanuric chloride non-protonic organic solution; 3), adding blocking agent, and carrying out reaction again; and 4), precipitating, filtering, cleaning the organic solvent, separating, and drying to obtain the triazine hyperbranched macromolecular carbon forming agent. Compared with the prior art, the invention has the advantages that the 'one-pot' method is adopted, the reaction process is continuous, the reaction time is short, the product has favorable heat stability, the carbon forming rate is high, and the processability is good.

The invention discloses a preparing method of spinel lithium titanate as Li-secondary battery cathode material, which adopts titanium dioxide and inorganic Li salt as raw material to low-temperature fusing salt as synthetic dielectrics to generate the product through solid-phase reaction.

The invention relates to a reaction system for alkyl nitrite and a preparation method for the alkyl nitrite. The preparation method comprises the following steps that: a trickle-bed reactor is adopted and porcelain ring filler is filled into the trickle-bed reactor; liquid added into the reactor forms liquid membranes on the filler; alkyl alcohol is taken as a liquid-phase raw material and nitric monoxide, oxygen and nitrogen are taken as gas-phase raw materials; and gas and liquid phases are reacted in the trickle-bed reactor by means of co-current flow or countercurrent flow under the condition of nitrogen protection so as to generate the alkyl nitrite. The mol ratio of the alkyl alcohol to NO is between 2 to 1 and 7 to 1, and the mol ratio of the NO to O2 is between 4 to 1 and 8 to 1; the reaction temperature is between 40 and 100 DEG C, and the reaction pressure is between 0.1 and 1.0 MPa; and the retention time of continuous feeding of liquid-phase alkyl alcohol in the trickle-bed reactor is between 10 and 500 minutes, and the retention time of continuous feeding of gas phase in the trickle-bed reactor is between 0.02 and 1 minute. The reaction system and the preparation method have the advantages that: the operating condition is mild; the reaction time is short; the conversion rate of the raw materials, and the selectivity and the yield of products are high; and the whole reaction system is convenient for realizing continuous production, etc.

The invention relates to a rutile type titanium dioxide nanowire film and a preparation method and applications thereof. The preparation method of the film comprises the steps of directly growing rutile phase titanium dioxide nanowire array on a conductive glass substrate, and evenly distributing titanium dioxide nanowire clusters on the surface of the top end of the array; and regulating the proportion of various reactants, reaction time, temperature and other factors by taking sulfate radical-containing titanium slat as precursor for preparing the film. The invention further provides applications of the film, and the film can be used as anode materials to assemble a solar cell, or as photocatalyst to carry out water photolysis or organic matter degradation treatment. The method is simple, and has strong controllability, the problems that therutile phase is difficult to be prepared by using the sulfate radical-containing titanium slat and the titanium dioxide nanowire array grows on the conductive substrate in situ are solved, and the change on the diameter and length of the nanowire can be realized while the no change on crystallinity of a sample can be ensured through a calcination method.

The utility model discloses a spherical hydroxyl nickel oxide cobalt manganese and the fabrication method, relating to the anode material of a lithium battery, and aiming to provide a spherical hydroxyl nickel oxide cobalt manganese and the fabrication method. The fabricated anode material of the lithium battery has the advantages of big tap density, good electrochemical activity, big specific volumetric capacity, low synthesis temperature and short reaction time. The key points of the technical proposal of the utility model are that: the general formula of the spherical hydroxyl nickel oxide cobalt manganese is Ni1-x-yCoxMnyOOH; the spherical hydroxyl nickel oxide cobalt manganese and the fabrication method comprise the following steps: (1)a mixed salt solution of nickel, cobalt and manganese is confected according to the ratio that Ni:Co:Mn=1:(1/5-2/5):(1/5-2/5); (2) an alkaline solution of two to ten mol/L is confected; (3) the mixed salt solution of nickel, cobalt and manganese, the alkaline solution and the ammonia are conducted to an reaction kettle; (4) the intermediate products are added to the reaction kettle according to the solid-liquid ratio of 1:2 to 10, and reacted with the oxidant to produce the utility model. The utility model is used as the anode material of lithium batteries.

The invention relates to a method for the preparation of CuS hollow balls in the field of inorganic materials and functional materials processing. First, a certain amount of soluble cupric salt and PVP are dissolved in the water for form clear solution, which is then added in with a certain amount of reductant to produce yellow suspending solution, and then added in with a certain amount of S source substance, reacting at the temperature of 10-90 degree for 10min to 24h to produce CuS hollow balls. The invention is characterized in soft preparation conditions, simple processing, low cost, high yield etc., which is good for industrialization production and the produced product is characterized in good dispersibility, uniform wall thickness, superior performances to the present products and wide application foreground.

The invention discloses a preparation method of bismuth phosphate (BiPO4) photocatalysts differing in structure, and adopts a hydrothermal method. The preparation method comprises the following steps of: 1) dissolving Bi(NO3)3.5H2O in a solvent to obtain a solution A; 2) dissolving Na2HPO4.12H2O in a solvent to obtain a solution B; 3) dropwise adding the solution B in the solution A to obtain a precursor solution; 4) transferring the precursor solution into a stainless steel reaction kettle, wherein hydrothermal temperature is 180 DEG C and reaction duration is 6-24hours; and 5) after the reaction, cooling to normal temperature, repeatedly cleaning and centrifuging through de-ionized water and anhydrous ethanol, and air-drying under a natural condition to obtain the target product. The preparation method disclosed by the invention has the advantages that the preparation method is simple in process, moderate in reaction condition, low in cost and high in crystallizing degree of the prepared product; and through different solvents, the prepared BiPO4 photocatalysts are different in structure with remarkable difference, easy to distinguish, and provide a material basis for widening application field.

The invention relates to a method for preparing a liquid product rich in furfural and other furan chemicals by biomass. The method comprises the following steps: a catalyst is added into particles of a biomass raw material by a dry method or a wet method; the mixture is dried after the mixture is sufficiently mixed; the mixture is placed in a drying cabinet to remove free moisture for standby; the obtained material is filled into a quartz reactor, the reactor is placed in a microwave purolyzer, and oxygen in the quartz reactor and a condenser pipeline is driven off by inert gas; and microwave is started, power of the microwave is adjusted to pyrolyze the material in the quartz reactor, and the pyrolyzed steam is condensed into a pyrolysis liquid through a two stage water-cooled condenser. The method has the advantages that the yield of the pyrolysis liquid reaches over 50 percent (dry base), the furfural in a liquid product is over 60 percent of the content of organic compositions, which is far higher than the content of quickly pyrolzed furfural by the biomass (below 10 percent), and the time of a pyrolyzing reaction is obviously shortened. The method has the characteristics of simple process, single product, high furfural selectivity, and the like.

The invention discloses a method for preparing a hierarchical bimetallic composite oxide denitrification catalyst by employing a prussian blue analogue as a precursor, and belongs to the technical field of hierarchical material preparation and environmental protection. The preparation method comprises the following steps of (a) preparing the prussian blue analogue, wherein the shape and size of the prussian blue analogue are controlled by controlling the reaction temperature, reaction time and the concentration and ratio of reagents under the condition that polyvinylpyrrolidone is used as a surfactant; and (b) calcining the prussian blue analogue prepared in the step (a) by controlling the temperature to obtain the hierarchical bimetallic composite oxide denitrification catalyst. According to the method, due to the combined action of a hierarchical porous structure and highly uniformly dispersed active ingredients, the catalyst has high catalytic activity and a wide active temperature interval, and can be used for the selective catalytic reduction removal of ammonia of nitrogen oxide in flue gas emitted by various movable source and fixed sources.

The invention relates to a polymer supported quaternary ammonium salt ion catalyst as well as a preparation method and an application thereof. The preparation method is characterized in that chloromethylated polystyrene is taken as a carrier and reacts with N, N-dimethylethylamine to obtain polymer supported quaternary ammonium salt ion liquid catalyst; and under the condition that the catalyst dosage is 0.04-0.4 g, the initial pressure of carbon dioxide is 0.5-5.0 MPa, the reaction temperature is 110-180 DEG C, and the reaction time is 1-10 h, cyclic carbamate is prepared with high selectivity through cycloaddition reaction of carbon dioxide and epoxide. The catalyst has higher catalytic activity to the cycloaddition reaction of carbon dioxide and epoxide without adding any organic solvent or catalyst promoter, and the reaction condition is mild, and the obtained cyclic carbamate has a high yield and selectivity. The solid catalyst has the advantages of low price of raw material, simplie preparation method, good hydrothermal stability, convenience in recovery, and reusability.

The invention provides a synthesis method for dehydrating biological ethanol to prepare ethylene, belongs to the technical field of the synthesis chemical project and relates to a preparation of the ethylene. The invention provides a method for dehydrating the biological ethanol to prepare the ethylene under the function of a nanometer molecular sieve catalyst. Under the normal pressure and in a certain temperature range, a fixed bed reactor which uses the nanometer molecular sieve as the catalyst and uses the liquid biological ethanol as a raw material, and while the inertia gas is used for adjusting the partial pressure of the gas ethanol in the preheating section of the reactor, the desorption of the generated ethylene from the catalyst is strengthened so as to achieve the aim of efficiently dehydrating and synthesizing the ethylene by the ethanol. The synthesis method of dehydrating the biological ethanol to prepare the ethylene of the invention is outstandingly characterized in that: (1) the nanometer molecular sieve is applied in dehydrating the biological ethanol to prepare the ethylene; (2) while the inertia gas is used for adjusting the partial pressure of the gas ethanol, the desorption of the generated ethylene from the catalyst is strengthened; (3) the catalyst is good in stability, reaction is low in temperature, ethanol is high in conversion, ethylene is high in selectivity, environment is not polluted and the process is simple. A nanometer HZSM-5 molecular sieve is used as the catalyst, and 95(v/v) percent of liquid ethanol is used as the raw material (the ethanol weight space velocity is 1.2 hours<-1>), the nitrogen is used for adjusting the partial pressure of the gas ethanol in the preheating section of the reactor, the ethanol conversion is more than 99 percent and the ethylene selectivity is more than 98 percent in the reaction time of 600 hours under the reaction temperature of 240 DEG C.

The invention discloses a preparation method of nano cellulose. The method comprises the following steps: under an ultrasonic condition, processing microcrystalline cellulose by a TEMPO-NaClO-NaClO2 oxidization system, washing the obtained cellulose solution, subjecting the cellulosed solution to centrifugation, directly freeze-drying the upper layer suspension, subjecting the lower layer precipitate to a nano-crystallization treatment to obtain nano cellulose dispersion liquid, and freeze-drying the dispersion liquid to obtain nano cellulose. The preparation method has the advantages that the reaction time is reduced due to the ultrasonic treatment, moreover, the consumption amount of reagents is reduced, the acid/alkali treatment is eliminated, thus the length of cellulose will not be destroyed by the acid/alkali treatment, nano cellulose with large strength can be obtained, the cellulose that has not reach the nano grade is subjected to a nano-crystallization treatment to increase the raw material utilization rate, the waste is reduced, and the energy is saved.

The invention discloses a method for preparing modified pseudo-boehmite. The method is characterized by comprising the following steps: (1) sequentially adding activated aluminum oxide, aluminum hydroxide and modifying agents into a proper amount of deionized water under the fully stirring condition, wherein the total amount of the activated aluminum oxide and aluminum hydroxide accounts for 5-20 mass percent of the deionized water, the modifying agent(s) is/are selected from one or more of boron, fluorine, silicon, phosphorus, magnesium, titanium, zinc and zirconium, and the total amount of the modifying agents accounts for 0.1-10 mass percent of the deionized water; (2) performing homogenizing and refining pretreatment on the obtained slurry, thereby obtaining the slurry of which the average particle size is 0.2-20 microns; (3) adding an alkali to regulate the pH value of the pretreated slurry system to 8-11, transferring the materials into a high pressure reactor to carry out a hydrothermal reaction, controlling the reaction temperature to 100-250 DEG C, wherein the reaction time is 1-48 hours; (4) performing solid-liquid separation on the obtained slurry after the reaction is ended, and washing, thereby obtaining a product filter cake in which the impurities are removed; and (5) drying, and grinding, thereby obtaining the pseudo-boehmite powder.

The invention discloses a decoder of an RFID receiver, comprising an input end from which data are input, an output end from which decoded data are output and a zero-crossing detection module; wherein, the zero-crossing detection module comprises a counting unit, a coding unit and a decoding unit; the counting unit is used for counting the data input from the input end; the coding unit is used for coding in accordance with the simplified storage format based on the output of the counting unit; the decoding unit is used for decoding the data subjected to real-time bi-phase space coding in the coding unit and outputting the decoded data from the output end. The invention also discloses a decoding method of the RFID receiver. The invention adopts the simplified storage format for coding the data, thereby dispensing with storing all the data, realizing real-time decoding and reducing consumption of hardware resources while solving the response time. The decoder is small and exquisite in structure and can be embedded into mobile phones for use.

A preparation method of chitosan with high deacetylation degree and high viscosity through shrimp shell includes the following steps: microwave drying and fresh-keeping are carried out on the raw materials; the deproteinization reaction between the shrimp shell and alkali solution with 5 to 10 percents concentration should be heated by microwave; the deacetylation reaction between chitin and NaOH solution with 45 to 50 percents concentration should be heated by microwave. After all the reactions, ethanol solution of the chitosan and the NaOH is obtained in the present invention for further deacetylation reaction. The present invention has the advantages of less acid and alkali use, short reaction time, economy, environmental protection, etc. The chitosan prepared by the present invention is the white or light yellow powder with high deacetylation degree and high viscosity, which can be widely applied in the fields of environmental protection, food, medicine, etc.

The invention discloses a preparation method of a Cu2O-CuO composite oxide. The preparation method comprises the following steps: adding a glucose solution with certain concentration and a certain amount of basic copper carbonate powder into a hydrothermal kettle, fully stirring, placing the hydrothermal kettle in an oven with a preset temperature, taking out a product after reacting for a period of time, and carrying out vacuum drying on the product to obtain the Cu2O-CuO composite oxide. According to the preparation method, the glucose content, the reaction temperature and the reaction time are adjusted to control the preparation, and no surfactant or acid-base reagent is added, so that the whole process is environment-friendly, the reaction condition are mild, the operation is convenient and efficient, the controllability and repeatability are good, and a high-yield spherical Cu2O-CuO composite oxide assembled by nanometer pieces can be prepared.

The invention relates to a flower-shaped copper oxide catalyst and a preparation method and application thereof to the direct synthesis of an organic silicon monomer. The preparation method of the flower-shaped copper oxide catalyst comprises the following steps: (1) adding copper salt to ethanol or mixed solvent of ethanol and water to form solution; and (2) stirring and adding ammonia, strong alkali and nitrate to the solution in sequence to obtain a homogeneous solution, transferring the homogeneous solution to a reactor to carry out the thermal reaction of a solvent, and controlling the amount of the product of reaction, the reaction temperature and the reaction time to obtain the lower-shaped copper oxide catalyst. The preparation process of the flower-shaped copper oxide catalyst has simple experiment procedures and low cost, is convenient to operate, is environment-friendly and can be produced on a large scale. The prepared flower-shaped copper oxide powder can be used as the catalyst to the field of the direct synthesis of the organic silicon monomer, and particularly, the flower-shaped copper oxide powder is highly selective for the dimethyldichlorosilane monomer.

Production non-metal doped nano-TiO2 is carried out by taking Ti non-metal compound as precursor, mixing it with acid and water, hydrothermal synthetic reacting at 110-300 degree for 1-60 hrs, washing, drying and grinding to obtain nano-TiO2 catalyst. It has no secondary pollutant and inactivation and better light catalytic effect.

A synthesis of polylactic acid in super-critical CO2 fluids iscarried out by: adjusting mono-lactide' concentration in a reaction kettle, catalyst and cosolving reagent and its concentration, adjusting reaction temperature, CO2 pressure, reaction time, CO2 purity etc. conditions, to obtain polylactic acid with different molecular weights, and extracting and removing the non-reacted monomers, catalysts and cosolving reagents etc. low molecular weight substances with super-critical CO2 after reaction. The polylactic acid is obtained without post treatment and direct post processing. This invention has advantages of without pollution for products and environment, saving post treatment works, only through depressing operation to realize separating for products and CO2 solvent. It meets demands of current green world environmental protection and saves resources.