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744 results about "Reaction timing" patented technology

Automatic playback overshoot correction system

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.

Reaction system and preparation method for nitrous alkyl ester

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.

Rutile type titanium dioxide nanowire film and preparation method and applications thereof

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.

A ball hydroxide oxidated Ni-Co-Mn and its making 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.

Method for preparing furan chemical by catalytic pyrolysis of biomass

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.

Synthesis method for producing ethylene with high-efficiency dehydration of biological ethyl alcohol

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.

Method for preparing modified pseudo-boehmite

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.
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