42 results about "Kinetics reaction" patented technology

Neurodegenerative diseases, such as multiple sclerosis, may be caused or aggravated by insufficient venous draining from the central nervous system. Functional MRI measures the surge of blood flow into localized regions of cerebral cortex in response to activation of those regions by performing visual, auditory or executive tasks. These fMRI measurements are based on blood-oxygen-level dependence. The resulting fMRI/BOLD data is converted to hemodynamic response data and analyzed to determine any abnormality in the hemodynamic response data. Vascular drainage insufficiency is identified in the presence of abnormal hemodynamic response data. Abnormal hemodynamic response data can be determined by a negative trough in a graph of the HDR data or by the duration, depth, or area of the negative trough.

The invention provides a molten steel dephosphorization agent and a molten steel dephosphorization refining method. The molten steel dephosphorization method comprises the following steps in sequence: ensuring the oxygen activity is greater than or equal to 5000ppm at the final point of molten iron at the blowing end point of a converter, and adding 5-8kg of a dephosphorization agent into each ton of steel in the process that steel is discharged from the converter, wherein the dephosphorization agent comprises the following components in parts by weight: 85-90 parts of lime and 10-15 parts of fluorite, and the total parts is 100; performing LF ladle refining on the molten iron, melting the slag in an electric heating mode, introducing argon for bottom blowing and stirring to the molten iron at the speed of 80-150Nm<3>/hour so as to provide a sufficient power reaction space to the molten iron and the dephosphorization slag, and subsequently slagging off. The molten steel dephosphorization agent has the beneficial effects that dephosphorization treatment can be performed on the molten iron after smelting and dephosphorization in the converter, so that the rephosphorization phenomenon of the molten iron which is smelted in the converter can be effectively avoided, and the dephosphorization effect is good.

A hollow profile sensor for installation in roads or a road surface for the purpose of sensing the weight of vehicles and/or driving dynamics reactions of vehicles or vehicle wheels to the road includes a tube part having a hollow interior profile. A counterpart is connected to the tube part. A measuring arrangement is held in the hollow interior profile between the tube part and the counterpart. A force introduction flange is connected to the tube part in such a manner that force application lines are concentrated on the measuring arrangement.

The invention relates to a hyperthermophilic glycosidase mutant and an application thereof in preparation of ginsenoside CK, and belongs to the technical field of biotechnology engineering. An amino acid sequence of the hyperthermophilic glycosidase mutant is as shown in SEQ ID NO:2; and the hyperthermophilic glycosidase mutant is applied to preparation of rare ginsenoside CK. The hyperthermophilic glycosidase mutant has high heat resistance and stability; relatively high catalytic activity can still be kept after heat preservation at 70-80 DEG C for over 300 hours, and thus hyperthermophilic glycosidase mutant has the advantages of low storage and transportation cost, and low requirement standards on a cooling system of a reactor when applied to production; the kinetic reaction is accelerated; meanwhile, the hyperthermophilic glycosidase mutant has beta-glucosaccharase activity; glucosides of main protopanaxadiol type saponins C3 site and C20 site can be hydrolyzed on the basis that the saponin structure is not destroyed; and the hyperthermophilic glycosidase mutant is efficient, specific, few in byproducts, high in yield and the like, so that the Fpglula can be applied to industrial production of a rare ginsenoside Compound K.

The invention discloses a high-performance oxygen reduction catalyst based on surface function enhancement provides a preparation method of the above catalyst. The catalyst is a HCM/Pt/C catalyst witha core-shell structure, the material of the shell is a porous heteroatom-doped carbon material coating the surface of a Pt active center. Since the heteroatom-doped carbon material has a special adsorption-enrichment effect on oxygen, the material can provide an oxygen-rich environment for an active site, the collision frequency of reaction gas oxygen and the active site is increased, and the kinetic reaction rate of an oxygen reduction reaction is greatly improved. At the same time, the electronic effect at a HCM/Pt interface optimizes the electronic structure of Pt, so that the adsorption of Pt on an oxygen reduction reaction intermediate is weakened, and the desorption rate is increased to provide a site for subsequent oxygen adsorption. On the other hand, a carbon shell around Pt particles prevents migration and agglomeration, and the overall stability of the catalyst is greatly improved.

The invention provides a blast furnace furnace-front molten iron titanium removing method comprising the steps that titanium remover is added into the molten iron of an iron tap channel of a blast furnace, then the molten iron falls to arrive into a torpedo ladle to be stirred, and titanium removing reaction is conducted on the molten iron; and the matching-in speed of the titanium remover is 1-3kg/s. Through the blast furnace furnace-front molten iron titanium removing method, the existing production mode and procedures are changed, the titanium remover can be evenly added into the iron tapchannel of the blast furnace, after added, the titanium remover provides kinetic reaction through molten iron flowing and falling, thus the titanium remover and the molten iron are fully mixed, reaction can be fully conducted, titanium removing efficiency is high, and field adaptability is high.

The invention discloses a method for quickly preparing silver/polypyrrole composite sol. An oxidation-reduction reaction between a silver salt and a pyrrole monomer is a simple and effective method for preparing a silver/polypyrrole composite material, but has the defect of low dynamic reaction speed. In the invention, a method for adding a microwave external field irradiation solution into a reaction system is provided, so that the reaction speed is effectively increased, and the silver/polypyrrole composite sol is formed within 15-270 minutes.

The invention relates to a calcium-carbonate-containing calcium oxide-based manganese alloy dephosphorization slag. The calcium-carbonate-containing calcium oxide-based manganese alloy dephosphorization slag comprises the following components in parts, by weight: 15-30 parts of calcium oxide,15-30 parts of manganese oxide, 35-45 parts of sodium carbonate, and 15-30 parts of fluorite, wherein the particle size D50 of the calcium oxide, the manganese oxide, the sodium carbonate and the fluorite is less than or equal to 10 mm; the preparation method of the dephosphorization slag comprises the following steps that pre-melting treatment on a mixed material is carried out, heating is carried out to 1000-1200 DEG C, and the temperature is kept for 30-50 minutes, the molten slag is poured out, andnaturally cooling is carried out; crushing and screening are carried out on the slag which is cooled to the room temperature, and finally the dephosphorization slag with the particle size smaller than or equal to 5 mm is obtained; and the application method of the dephosphorization slag is provided, when the manganese alloy is smelted, the preheated dephosphorization slag is added in multiple times. The preparation and the application method have the beneficial effects that effects of dephosphorization in the slag is stabilized through the dephosphorization slag, the gas generated by decomposition of the sodium carbonate can play a role in stirring and removing phosphorus slag at the same time, and a kinetic reaction condition is increased, the dephosphorization melting point of the manganese oxide and the fluorite is reduced, the liquidity of the dephosphorization slag is improved, and the better dynamic condition is provided for the dephosphorization.

The invention belongs to the field of fruit fresh keeping and storage, and discloses Ag-TiO2/Ti(NO2)/ITO photoelectrode, a photoelectric synergistic catalytic reaction apparatus based on the Ag-TiO2/Ti(NO2)/ITO photoelectrode and application of the photoelectric synergistic catalytic reaction apparatus. A Ag-TiO2/Ti(NO2)/ITO system is used as a photoelectrode, a TiO2 film is doped and modified byvirtue of Ag, then the plasma treatment is performed at the atmosphere pressure of N2, N is in site doped to form a novel phase, a semiconductor photocatalytic oxidation method and an electrochemicalmethod are combined to produce a synergistic effect, so that the quantum efficiency of the catalytic process can be significantly increased, when the photoelectrode synergistic catalytic reaction apparatus is applied to the fresh keeping of fruits, the effect is apparently improved compared with the single photocatalytic effect and the single electric catalytic effect, and a monopolar dynamics reaction rate constant of the C2H4 photoelectric synergistic catalytic degradation is increased from the 6.86*10<-4>(min<-1>) with no voltage to 9.06*10<-4>(min<-1>) and is increased by 32 percent.

The present invention is directed to an apparatus and method for obtaining kinetic information for commercial-form catalysts using minimal catalyst material while approximating large-scale reactor hydrodynamics and heat and mass transfer.

The present invention relates to systems and methods for obtaining optimized EPO dosage regimens for a desired pharmacodynamic/pharmacokinetic response. The system includes choosing one or more EPO dosage regimens, then using a PK/PD model to determine the pharmacodynamic/pharmacokinetic profile of one or more EPO dosage regimens, and finally selecting one of the EPO dosage regimens for administration to achieve the desired pharmacodynamic/pharmacodynamic response based on the EPO profile.

The invention discloses a preparation method of methyl-terminated propenol polyether. The preparation method includes: adding a propenol polyoxyethylene ether raw material into an external-circulating spray-type reactor for deoxidizing, nitrogenizing, replacement and protection; starting an external circulating pump for high-speed circulating spraying, controlling reaction temperature to 0-60 DEG C, and spraying a liquid alkali raw material into the reactor; slowly adding a methane chloride raw material, and sufficiently mixing for reaction. The system belongs to dynamic control systems, side reaction is sufficiently inhibited, and a low-temperature method is further adopted to control dynamic reaction according to the characteristic that the side reaction is high in activation energy, so that hydrolysis reaction of methane chloride is inhibited, allyl isomerization reaction is further inhibited, the reaction system is higher in selectivity, and color of methyl-terminated propenol polyether which is finally obtained is lower than 30 while terminating rate is higher than 98%.

The invention discloses a novel method for terminating allyl alcohol irregular polyether methyl. The novel method comprises the following steps of: adding allyl alcohol irregular polyether raw materials through a material inlet in a jetting loop reactor based on Venturi effect, deoxidizing and introducing inert gases for replacement and protection, and starting an external circulating pump to carry out high-speed jetting mixing; and at a control temperature ranging from 20 DEG C to 70 DEG C, slowly adding a methane chloride raw material and an alkali raw material into the jetting loop reactor through a methane chloride raw material feeding hole and a material feeding hole separately, and the like. According to the novel method disclosed by the invention, this system belongs to a dynamic control system, side reactions are restrained sufficiently, a low-temperature method is further adopted to carry out dynamic reaction control according to the characteristic that activation energy of side reactions is high, hydrolysis reaction of methane chloride is restrained, and isomerization reaction of allyl is further restrained, and therefore, selectivity of a reaction system is higher. Finally obtained allyl alcohol irregular polyether methyl terminated product has color and luster smaller than 30, and has a terminating rate greater than 98%.

The invention belongs to the technical field of molecular sieves and preparation thereof and discloses a hierarchical porous titanium-silicon molecular sieve catalyst with an oxidative desulfurizationfunction and a preparation method and application thereof. The preparation method includes the steps of mixing tetrapropylammonium hydroxide and deionized water, dropwise adding ethyl silicate and butyl titanate, and stirring; transferring the mixture to a stainless steel high-pressure kettle, and drying in a drying box at 180 DEG C in static state; separating by centrifuging, washing, and dryingovernight in an oven at 80 DEG C to obtain a molecular sieve; mixing the molecular sieve, sodium hydroxide, water and aspartic acid, stirring at room temperature, filtering by centrifuging, drying the filter residue in the oven at 80 DEG C for 10 hours, taking out, and calcining in a muffle furnace for 6 hours at a temperature rate of 2 DEG C/min from room temperature to 550 DEG C to obtain the catalyst herein. The molecular sieve catalyst of Si/Ti=20 is up to 43% in conversion rate 4 hours after sulfide removal; dynamics simulation of the catalyst shows that the reaction is first-order dynamics reaction.

The invention provides a method and device for predicting the bottom scouring depth of an underwater crossing pipeline, and belongs to the technical field of underwater crossing pipelines. According to the technical scheme provided by the embodiment of the invention, the corresponding limit equilibrium scouring depth and the duration of reaching the scouring equilibrium state are obtained based on the various characteristic parameters of the first crossing pipeline which is scoured in the river; and the data are obtained based on the actual scouring data, so that the reliability is relatively high, and the accuracy is high. According to the data, the scouring time and the scouring depth of the first crossing pipeline and the first-level kinetic reaction equation, a scouring pit vertical expansion mathematical model of the crossing pipeline in the river can be obtained, and the model can reflect the rule that the scouring pit depth changes along with the scouring time. Based on the mathematical model, the scouring depth of the to-be-predicted second crossing pipeline at any preset scouring time can be obtained, so that a riverbed can be reinforced in time, and the safety and reliability of the underwater crossing pipeline are improved.

The invention discloses a preparation method of allyl alcohol polyether glycidyl ether. The method comprises the following steps: in an external circulation spray reactor, adding allyl alcohol polyoxyethylene ether raw materials, carrying out deoxygenation-nitrogenization replacement protection, starting an outer circulating pump to carry out high-speed circulating spray; controlling the temperature at 10 to 55 DEG C, spraying epichlorohydrin raw materials and liquid caustic soda raw materials into the reactor to fully mix and make the allyl alcohol polyoxyethylene ether raw materials, the epichlorohydrin raw materials and the liquid caustic soda raw materials react and the like, the system belongs to a kinetic control system, and side effects are further sufficiently inhibited. In addition, according to the characteristic of high activation energy of the side effects, the preparation method of the allyl alcohol polyether glycidyl ether uses a low-temperature method to carry out kinetic reaction control, so that a reaction system is higher in selectivity. The color of the finally obtained product, namely the allyl alcohol polyether glycidyl ether is less than 40, and the capping rate of the allyl alcohol polyether glycidyl ether is greater than 96%.

The invention discloses a method for preparing methyl-ended butanol random polyether. The method comprises the following steps: adding a butanol random polyether raw material into a Venturi effect-based jet loop reactor through a material inlet; removing oxygen and introducing inert gases for replacement and protection; starting an outer circulating pump for high-speed jet mixing; and controlling the temperature to be 20-80 DEG C, slowly adding a methane chloride raw material and a bas raw material respectively through a methane chloride inlet and the material inlet, and the like. The system belongs to a kinetic control system, and the side effect is sufficiently inhibited. Furthermore, according to the characteristic of high side reaction activation energy, a low-temperature method is adopted for kinetic reaction control, the hydrolysis reaction of methane chloride is inhibited, and thus the reaction system has higher selectivity. Finally, the methyl-ended butanol random polyether product has the color of less than 30 and the ending rate of more than 98 percent.

The invention discloses a supported bridged bis-phenoxy IVB metal catalyst and a preparation method thereof. The structural formula of the active component [ONNO]MX2 of the catalyst is disclosed as Formula (I) or Formula (II). The active component of the catalyst is supported on a triethyl-aluminum-modified MgCl2/EtnAl(OR)[3-n] supporter, wherein R is C2-C5 straight-chain alkyl; and n represents the quantity of hydroxyl hydrogens substituted by triethyl aluminum in ethanol, and n=0-3. According to the characteristics of the [ONNO] bridged bis-phenoxy IVB metal catalyst framework ligand, the [ONNO] bridged bis-phenoxy IVB metal catalyst is supported on the MgCl2/EtnAl(OR)[3-n] supporter to form a novel supported catalyst, thereby solving the problem of low activity in the homogeneous [ONNO] bridged bis-phenoxy IVB metal catalyst. The kinetic reaction of the novel supported catalyst is stable and efficient, has higher catalytic activity, and can be used for preparing branched polyethylene.