45 results about "Equilibrium time" patented technology

The invention discloses a headspace gas chromatography method for determining the residual quantity of an organic solvent in a glycine bulk drug. The method is implemented under conditions that a DB-624 capillary column and a hydrogen flame ionization detector are used, sample inlet temperature is 150 DEG C, the detector temperature is 250 DEG C, high purity nitrogen is taken as carrier gas with flow rate being 2.2 mL / min, the split ratio is 10:1, headspace heating temperature is 80 DEG C, and equilibrium time is 35 min; besides, glycine is easily soluble in water and the 12 solvents are soluble in water to a certain degree, so that an aqueous solvent is adopted. The method can be used for simultaneously determining the residual quantity of the 12 organic solvents including methanol, ethanol, acetone, isopropanol, acetonitrile, dichloromethane, n-propanol, ethyl acetate, tetrahydrofuran, cyclohexane, n-butanol and toluene in the glycine bulk drug, has the characteristics of being easyto operate, quick, sensitive and accurate in result, and provides reference for effectively controlling the quality of the glycine raw material and ensuring medication safety.

A system for determining nucleic acid sequences, including (a) an array of nucleic acid features; (b) a fluidic apparatus configured to deliver sequencing reagents, including polymerases and nucleotides, to the array; (c) a detector configured to obtain pre-equilibrium kinetic measurements from the array at a resolution that distinguishes individual nucleic acid features; (d) a control module having instructions for (i) directing the fluidic apparatus to deliver the sequencing reagents to the array, and (ii) directing the detection apparatus to obtain the kinetic measurements; and (e) an analysis module having instructions for (i) processing the kinetic measurements to determine binding of the polymerase molecules to the nucleic acid features at several pre-equilibrium time points, thereby determining a transient state of the polymerase molecules at the nucleic acid features, and (ii) identifying nucleic acid features that correctly incorporate the nucleotide molecules based on the transient state of the polymerase molecules.

The invention belongs to the technical field of analysis methods for natural gas and especially relates to a carbon isotope analysis method for a series of hydrocarbon compounds in natural gas. The method comprises the following steps: step A, carrying out solid-phase micro-extraction enrichment on a series of hydrocarbon compounds in natural gas; step B, separating the hydrocarbon compounds and carrying out qualitative analysis on unknown hydrocarbon compounds; and step C, carrying out carbon isotope determination on the hydrocarbon compounds. According to the invention, solid-phase micro-extraction technology is introduced into a natural gas isotope analysis method and combined with a GC-IRMS analysis system, influence of factors like equilibrium time and equilibrium temperature on difference of adsorption capability of the hydrocarbon compounds and on carbon isotope values are analyzed, and operation conditions are optimized, so effective enrichment and carbon isotope composition analysis of the series of hydrocarbon compounds in natural gas are realized. The method provided by the invention can realize rapid and effective enrichment and carbon isotope composition analysis of the series of hydrocarbon compounds in natural gas.

The invention provides a nondestructive equilibrium management system of a modular high-power battery pack. The system comprises an equilibrium charging / discharging module, a battery parameter acquisition module and a microprocessor, wherein the equilibrium charging / discharging module is connected with the battery pack to charge or discharge battery cells required to be equilibrated in the battery pack; the battery parameter acquisition module acquires battery information of each battery cell in the battery pack; and the microprocessor is used for receiving the battery information of the battery parameter acquisition module, judging a charge state of each battery cell according to the acquired battery information, determining the battery cells required to be equilibrated and the equilibrium time according to the acquired battery information if a preset threshold is exceeded, and controlling the equilibrium charging / discharging module to charge or discharge the battery cells required to be equilibrated according to the battery cells required to be equilibrated and the equilibrium time. According to the nondestructive equilibrium management system, the flow of energy between the battery cells is realized in a centralized management mode to finish an equilibrium management function, and dynamic online nondestructive equilibrium is implemented through charging, discharging or standing of the equilibrium charging / discharging module to the battery cells so as to finish nondestructive equilibrium management of the battery pack.

The invention relates to an ovarian large cortex piece vitrified cryopreservation protection liquid and a cryopreservation method thereof. Although the vitrified cryopreservation method is widely applied to experimental animals, a universal cryopreservation method and a standard cryopreservation liquid preparation scheme are absent at present, so that the sized transplantation subjected to vitrified cryopreservation is at a small-size stage, an ovarian small cortex piece has limited follicles, and the service life of the transplanted follicles is influenced. The invention provides vitrified cryopreservation protection liquid suitable for an ovarian large cortex piece, and gonadotropin is added on the basis of the common vitrified liquid. According to the vitrified cryopreservation protection liquid suitable for the ovarian large cortex piece, especially the ovaries of experimental animals, improved variety livestock and wild endangered species in sudden death are conveniently cryopreserved at the most proper osmotic equilibrium time of performing vitrified cryopreservation on the ovarian large cortex pieces of different sizes; and moreover, according to the method, the survival rate of the follicles can be improved, the blood reperfusion time of the transplant is shortened, and the survival rate of the cryopreserved ovarian transplantation in vivo is improved.

The invention discloses a method for determination of pesticide residues in vegetable oils, and the method includes (1) sample treatment; (2) preparation of a standard solution; (3) chromatographic conditions: a Restek C18 chromatographic column, column temperature of 35 DEG C, equilibrium time of 5min, injection volume of 10 muL, flow rate of 0.5mL / min, mobile phases comprising A 10mMol ammonium acetate aqueous solution and B 10mMol ammonium acetate methanol solution; (4) mass spectrometry conditions: an electrospray ion (ESI) source, positive ion scan, a programmed multiple reaction monitoring mode, curtain gas of 15L / min, GS1 atomization gas of 60L / min, GS2 auxiliary heating gas of 70L / min, a medium CAD (collision-activated dissociation) collision gas, auxiliary heating gas temperature of 500 DEG C and spray voltage of 5000v. The high throughput detection method for variety of pesticide residues in three commonly used vegetable oils comprising olive oil, palm oil and peanut oil is established and is used for quality control of the vegetable oils.

The invention relates to a high-magnification thermoplastic polyurethane microporous foamed plate which is prepared from the following components in parts by weight: 70-100 parts of TPU (thermoplastic polyurethane) and 0-30 parts of polydimethylsiloxane. The high-magnification thermoplastic polyurethane microporous foamed plate has the advantages that, as a supercutical fluid has relative high solubility in the polydimethylsiloxane and the polydimethylsiloxane has relatively low interfacial tension, a little polydimethylsiloxane mixed in the TPU greatly accelerates the diffusion velocity of the supercutical fluid in the TPU; a diffusion equilibrium time of the supercutical fluid in the TPU is shortened; the volume of a die cavity is slightly more than that of a TPU plate; moreover, a die made of a breathable metal material is laid on a surface of a die, so that the supercutical fluid can synchronously diffuse to enter the TPU plate through the upper surface and the lower surface of the TPU plate; in comparison with that the supercutical fluid can diffuse to enter the TPU plate through the upper surface only, a diffusion distance is shortened; the diffusion equilibrium time is shortened; the production efficiency is improved; in addition, the invention also provides a production method of the high-magnification thermoplastic polyurethane microporous foamed plate.

The invention discloses alkali-modified pig manure biochar and a preparation method and application thereof. The preparation method of the alkali-modified pig manure biochar comprises: (1) pyrolyzingpretreated pig manure in nitrogen at 300-700 DEG C, during which the temperature increasing rate is 8-12 DEG C / min and the pyrolysis time is 2 h-4 h, and performing cooling, crushing and sieving to obtain pig manure biochar; (2) mixing the biochar with potassium hydroxide solution, stirring the mixture for reaction at a reaction temperature of 90-100 DEG C and a stirring speed of 867-1300 r / min for 12 h-24 h, and then performing filtering, washing and drying to obtain the alkali-modified pig manure biochar. The alkali-modified pig manure biochar is large in specific surface area and pore area,greatly shortens the absorption equilibrium time, achieves high capacity of removing lead in waters, and meanwhile, is simple in preparation process and low in cost and has a broad application prospect.

The invention relates to the technical field of power, and especially relates to an equalizing charging circuit for a battery pack, and a control circuit for an equalizing charging circuit. Based on the above equalizing structure, an inversion module is started for charging a low-voltage battery unit when voltage of the battery unit is too low, and then a chopping module is used for charging the whole body, thereby completing the equalization of key tasks. When the voltage of the battery unit is too high, the chopping module is started at first, and enables the electric quantity of the high-voltage battery unit to be transferred to other low-voltage battery unit, and then the inversion module is used for charging the whole body, thereby achieving the equalizing charging. According to the scheme, the two modules cooperate with each other, thereby reducing the equalizing time, guaranteeing the equalizing precision, avoiding a condition that a single module cannot adapt to various types of imbalance conditions and achieves the equalizing function and effect improvement.

A supergravity extraction separation couple device and its application are provided. A supergravity mixing unit and an extraction separation unit are simultaneously arranged, the supergravity mixing unit first disperses at least one of that light phase fluid and the heavy phase fluid into micro-nano scale droplet, and mixes the two fluids to form an extraction mixed fluid, the contact area of thetwo-phase fluid is increased, on the other hand, the light phase fluid and the heavy phase fluid in the extraction mixture fluid are separated by centrifugation in the extraction separation unit, thedispersion of one phase and the mixing efficiency between the two phases are improved, and the extraction equilibrium time is shortened, and moreover the centrifugal force generated by a driving motorin the supergravity mixing unit can simultaneously act on the extraction separation unit, on the one hand, the separation time is shortened, on the other hand, the power consumption is saved, and theenergy utilization rate is improved.

The invention discloses a method for analyzing a residual solvent in an explodable bead of a cigarette filter based on the HS-GC (head space-gas chromatography) / MS (mass spectrometry) technology. The method is characterized in that after a sample is pinched to be broken by an external force, a matrix correction agent and an internal standard into a head space bottle, a cover is applied for sealing, and the HS-GC / MS method is used for measuring the residual solvent in the explodable bead of the cigarette filter under certain equilibrium temperature and certain equilibrium time. According to the method, unknown ingredients contained in the sample can be monitored while the residual solvent in the explodable bead of the cigarette filter is simply and quickly detected. The universality is wide, the expandability is strong, the detection result is accurate, the repeatability is good, the pre-treating process is simple, and easy operation, high throughout and low cost are realized.

The invention relates to a zirconium-loaded organic hybridizing adsorbent capable of removing radioactive caesium in water as well as preparation and a use method of the zirconium-loaded organic hybridizing adsorbent. The adsorbent is a nano zirconium phosphate-strong acid cation exchange resin organic hybrid material adsorbent with zirconium loading capacity of 13%-37%. The preparation method comprises the following steps: preparing a precursor by using zirconium oxychloride as nano zirconium phosphate, dissolving the precursor in 10%-35% deionized water, then adding a certain mass of strong acid cation exchange resin with solid-to-liquid ratio of 50-150g / L and reaction temperature of 40-60 DEG C, fully stirring for 18-36h and then filtering out resin particles; adding the resin particles to a 20%-60% phosphoric acid solution in volume fraction, fully stirring for 18-36h at the temperature of 15-25 DEG C and then filtering out, and carrying out thermal treatment for 5-10h at the temperature of 40-60 DEG C after washing the solution to be neutral. The adsorbent disclosed by the invention is large in caesium adsorbing capacity and short in equilibrium time and still shows good adsorbability when conventional high-concentration positive ions including Na<+>, Ca<2+> and Mg<2+> and the like exist in the water; the preparation method is simple.

The invention discloses a vitrification freezing observing device. The vitrification freezing observing device comprises a vertical microscope, an isolation box and a culture dish; the vertical microscope is connected with a shooting device and used for observing and shooting; the hollow part of the isolation box is shaped like a cylinder, and the isolation box is arranged on a containing table of the vertical microscope and used for bearing observation materials and passing light rays below the containing table of the vertical microscope; the culture dish is arranged in the hollow part of the isolation box and used for containing the observation materials. When the vitrification freezing observing device is applied to optimal liquid glass screening and structure equilibrium time optimization, vitrification states of different liquid glass in the rapid freezing and remelting process and surface area changes of structure in the liquid glass in the equilibrium process can be conveniently observed, initial glassy state screening and optimization and determining of structure equilibrium time are completed, the advantages of being rapid, easy and convenient are achieved, and invalid work is greatly reduced.

The invention relates to a TDS-OFDM receiving device using different equalizing methods according to channel status and a equalizing method, which comprises: a synchronous unit which is used to enable the OFDM signal according to the receiving of the antenna, transformation to baseband and the analog-digital conversion to be synchronous; a demultiplexer which is used to decompose the OFDM signal received from the synchronous element to a plurality of signals comprising the synchronous information and the OFDM code elements; a time domain equilibrium element which is used to use the OFDM code elements in the synchronous information equilibrium time domain; a first FFT unit which is used to transform the correlation of the synchronous information by the FFT; a second FFT unit which is used to transform the OFDM code elements by the FFT; a frequency domain equilibrium unit which is used to use the correlation of the synchronous information transformed in the first FFT unit to balance the OFDM code elements transformed in the second FFT unit; and a channel state confirmation unit which is used to calculate the correlation of the synchronous information to estimate the channel state, and choose one of the time domain equilibrium unit and the frequency domain equilibrium unit for equilibrium based on the estimated channel state. So the receiving function is improved by choosing one of the time and the frequency domain equilibrium units according to channel state.

The invention discloses a method for predicting the influence range of surface crack on an internal temperature field of concrete. The method comprises the steps of on basis of a temperature responsetest, using ANSYS finite element software to carry out numerical simulation analysis of concrete temperature response, establishing a finite element model of a concrete sample with surface cracks, studying a one-dimensional temperature response process of the model, and considering the actual concrete structure protective layer thickness and crack situation; extracting the temperatures of nodes atdifferent depths from the upper surface of the concrete for analyzing, and working out the temperature response equilibrium time of the concrete with the surface cracks; using the temperature response equilibrium time at the distal end of the cracks as a reference value to calculate ratios of the temperature response equilibrium time at different coordinate positions to the reference value so asto obtain relative values of the concrete temperature response equilibrium time at the different coordinate positions, defining a coordinate region corresponding to the certain relative values as theinfluence range of the cracks, and carrying out regression fitting analysis to obtain a calculation model of the influence range of the concrete cracks.

The invention belongs to the technical field of vanadium hydrometallurgy and ionic liquid extraction, and particularly relates to a method for extracting vanadium from an acidic solution by using an ionic liquid [OMIM]BF4. According to the present invention, an oxidant is added into a vanadium-containing solution obtained from the vanadium extraction process of a vanadium-containing mineral to make the low-valent vanadium be oxidized into the pentavalent vanadium so as to obtain a vanadium-containing acidic solution, the vanadium-containing acidic solution and an ionic liquid are mixed, liquid-liquid extraction is performed, the mixing solution obtained after the completion of the extraction is subjected to centrifugal separation to obtain a vanadium-bearing organic phase and a raffinate, the vanadium-bearing organic phase is subjected to back extraction with a back extraction agent, and the mixed solution obtained after the completion of the back extraction is subjected to centrifugal separation to obtain the pure vanadium solution and the recovered ionic liquid; and the method has characteristics of high extraction efficiency, short equilibrium time, rapid layering after extraction, no emulsification phenomenon, and simple operation, wherein the ionic liquid is hydrophobic and is substantially immiscible with water so as to reduce the organic phase loss due to the water phase entrainment or dissolution.

The invention discloses a dynamic analysis method for a controlled reserves-variable gas well, which breaks through the limitation that a conventional single well dynamic analysis theoretical model and a conventional interpretation method assume that single well controlled reserves is fixed, and accurately analyzes and estimates the change of controlled reserves in a long-term production process of a gas well. The dynamic analysis method comprises the following steps: S1. data segmentation: segmenting according to slope change on a pressure index-total material balance time curve; S2. data regression: selecting an interval according to the real time in segments, performing linear regression, and determining an initial value of phase reserve; S3. gas well iteration: performing material balance correction on gas reservoirs. The invention provides the production dynamic analysis method for the controlled reserves in multiple stages, an analysis mode of dynamic material balance is followed, the variation of the controlled diagnoses is reserved through the slope of a pressure material balance time curve, stage division is performed on multi-controlled reserves analysis data, and segmentdata regression analysis is performed, so that the controlled reserves in each stage is estimated.

The invention discloses a dynamic method for measuring surface property parameters of a substance. In the dynamic method, the surface property parameters of a liquid substance to be measured are obtained by processing the substance to be measured by electrolyte solution, measuring the activity of the liquid to be measured after reaction according to a set time interval and carrying out processingby a dynamic data processor and a surface property operation module in a detection system. According to the dynamic method, the ion exchange dynamic method is adopted to overcome the difficulties that in the measuring process, the reaction balance time is long, the balance is difficult to determine and the accurate calibration of an m value is difficult to implement; dynamic data obtained in short time is utilized to carry out accurate forecasting, so that the difficulties that the balance time is long and the balance is difficult to determine are overcome; five parameters of surface properties of the substance can be calculated only by two parameters, i.e. the intercept and the slope, of an equation of linear regression, which is obtained by the dynamic data; and meanwhile, after the dynamic method is adopted, the total quantity of surface charges can be directly measured.

The invention relates to an energy-saving environmental protection and CO2 emission reduction technology, and aims to provide a method for removing CO2 from biohydrogen alkane gas by ionic liquid supported on graphene. The method comprises the following steps of mixing ionic liquid [P66614][Triz] with anhydrous ethanol, adding the graphene, and stirring to obtain a liquid-solid mixed suspension; heating and evaporating to remove ethanol to obtain supported ionic liquid; loading into a fixed bed reactor, and introducing the biohydrogen alkane gas for chemical absorption reaction; desorbing thesupported ionic liquid which absorbs CO2 by heating to obtain CO2; recycling the regenerated ionic liquid for use. When the ionic liquid [P66614][Triz] is supported on the graphene with a high specific surface area, the absorption reaction rate of the ionic liquid to the CO2 in the biohydrogen alkane gas can be significantly increased, the rate of a mixed absorbent removing the CO2 is increased by20-70%, compared with the rate of pure ion liquid [P66614][Triz] removing the CO2, and the absorption equilibrium time is shortened by 20-40%.

The invention relates to a method for determining the content of methyl p-toluenesulfonate in a medicine, and concretely relates to a method for detecting the content of methyl p-toluenesulfonate in amedicine through headspace derivatization gas chromatography-mass spectrometry. The above derivatization method, using a mixed aqueous solution containing vitamin C and sodium iodide as a derivatization solution, has the advantages of wide suitable equilibrium temperature and equilibrium time range, high sensitivity, high precision, high accuracy, good durability, and easiness in operation, and can realize the accurate determination of the methyl p-toluenesulfonate in the medicine in order to ensure the safety of the medicine.

The invention relates to a forced convection heat transfer test device for a comprehensive environmental stress test. The forced convection heat transfer test device for the comprehensive stress testprovided by the invention comprises a test box, an air supply system, an air supply pipeline and a ventilation cover; the air supply system is arranged on the top of the test box; the ventilation cover is installed on the opening of the cabin of a tested product; the ventilation cover is connected with the air supply system through the air supply pipeline; the air supply system feeds an airflow, the temperature and the humidity of which are same as that in the test box, into the cabin of the tested product; the temperature equilibrium time in a test process is accelerated; the test time is shortened; the test efficiency is increased; and the cost is reduced.

The invention relates to the preparation and application of a lithium ion sieve with a three-dimensional macropore-mesoporous structure. The lithium-ion sieve uses polystyrene microsphere arrays as a template, and isopropyl titanate and anhydrous lithium acetate as titanium and lithium sources, and obtains titanic acid with a three-dimensional macroporous-mesoporous structure by infusion and calcination. Lithium 3DM‑Li4Ti5O12. Finally, 3DM‑Li4Ti5O12 was delithiated by acid leaching to obtain a three-dimensional macroporous‑mesoporous lithium ion sieve 3DM‑H4Ti5O12. The macropore structure in the lithium ion sieve is arranged regularly, and the pores are connected through mesopores, forming a three-dimensional macropore-mesopore structure in which the channels are interconnected. Compared with other materials, the unique pore structure of the lithium ion sieve is conducive to the entry of lithium ions into the pores from all directions, reducing the internal diffusion resistance of lithium ions, reducing the adsorption-desorption equilibrium time of lithium ions, and increasing the adsorption capacity of lithium ions. The above many advantages make the lithium ion sieve can be used as a good lithium adsorption material.

The present invention discloses a method and a structure of a temperature and humidity testing chamber for shortening the time of balancing high temperature and high humidity. A heater is fixed on a saturer inside the temperature and humidity testing chamber. When the workaround of the temperature and humidity testing chamber is want of higher humidity, the saturer is solely heated by the heater to increase the quantity of saturated moisture and then the saturated moisture is delivered to the workaround. The present invention resolves the problems that high temperature and high humidity take a long time to be balanced and even high temperature and high humidity can not be carried out. The heater is used to heat solely the saturated moisture that is brought about by the saturer, which can make the temperature and humidity of the workaround be up to the preset numerical value. In comparison with the testing chamber without the heater, the balance time can be shortened by 20-40 percent, and at the same time, the demand of high temperature and high humidity can be easily attained. Thus, the present invention has the advantages of expanding the scope of humidity test; shortening the balance time; and making the temperature and humidity testing chamber meet the demands of high temperature and high humidity.

The invention discloses a method for removing arsenic in water. According to the method, strong base anion exchange resin is used for removing arsenic in water; the molecular structural formula of the strong base anion exchange resin is shown in the specification, wherein n is more than or equal to 2. The method has the advantages of high arsenic removal rate, relatively high selectivity in the presence of certain co-existing ions, simple technological operation and facilitation of industrialization. The strong base anion exchange resin is wide in using pH range and relatively high in adsorption capacity under the condition that the pH value is 1-14. The strong base anion exchange resin is high in adsorption rate, short in equilibrium time, high in adsorption capacity and easy to regenerate and can be recycled.

The invention discloses preparation of an ionic liquid modified magnetic graphene oxide (MGO) composite material and a method for adsorbing and removing trivalent arsenic As(III) and pentavalent arsenic As(V) in water. The traditional trivalent arsenic and pentavalent arsenic adsorbing materials are poor in adsorption effect and long in time and are difficultly separated from water. The preparation method disclosed by the invention comprises the following steps: preparing the MGO by a common method, performing ultrasonic mixing on [BMIM] [PF6] and the MGO, washing and drying after reaction completion, thereby obtaining the magnetic graphene oxide-ionic liquid composite material. The preparation method is simple and convenient. The material has large specific surface area of magnetic graphene oxide, the characteristic of superparamagnetism and excellent characteristics of the ionic liquid, has excellent dispersion property in water, and is easily separated from water by virtue of an applied magnetic field. The maximal adsorption capacity of the trivalent arsenic and pentavalent arsenic respectively reaches 155.65mg / L and 149.25mg / L, the equilibrium time is only 30 minutes, the material can be repeatedly utilized for 5 times, and the anti-jamming capability is high. The method can be used for removal and recycle of arsenic in arsenic-containing wastewater and separation and enrichment of trace trivalent arsenic and pentavalent arsenic in the water.

The invention discloses a method of removing palladium in NPTHs (Non-Plated Through Hole) of a PCB. The method is characterized in that after the procedure of eletcroless plating copper of PTHs (Plated Through Hole) is completed, and before a chemical gold procedure is performed, a palladium removing agent is sprayed to the PCB to remove colloid palladium on the walls of NPTHs, wherein the palladium removing agent is formed by 0.4-0.8 mol / L of hydrochloric acid, 50-80 g / L of sulfourea and the balance of water. According to the invention, concentration of sulfourea solution and hydrochloric acid solution in the palladium removing agent and proportion of the sulfourea solution to the hydrochloric acid solution are optimized, and as for colloid palladium, the palladium removing agent has favorable removal rate and shorter reaction equilibrium time, which is particularly conducive to use in large-scale industrial production.

The invention discloses uracil maleamic polyol ester and a preparation method and application thereof. The chemical formula of uracil maleamic polyol ester is as shown in the specification, wherein R1is H or CnH2n+1, R2 is H or CnH2n+1, R3 is CnH2n+1-x(OH)X, n=1-10, and X is greater than or equal to 3. The uracil maleamic polyol ester can effectively inhibit degradation and coloration of PVC, improve thermal stability of PVC, and enhance precipitation resistance of aminouracil. The plasticized peak torque reaches 18-26 Nm, equilibrium torque is 15.0-16.8 Nm, and equilibrium time is 28-35min.Meanwhile, the uracil maleamic polyol ester has good synergistic effect with a Ca-Zn heat stabilizer when being used as a PVC heat stabilizer. Thus, heat stability and precipitation resistance of PVCare further improved, and the heat stable temperature can reach 190-195 DEG C.

The invention relates to a method for synthesizing low-viscosity room temperature vulcanized methyl silicone rubber. According to the method, a dimethyl dichlorosilane concentrated-acid hydrolyzate istaken as a raw material to undergo a polycondensation reaction under action of a basic catalyst, the viscosity of the reaction material is monitored by a low-range online viscometer, a neutralizing agent is added after a target viscosity is reached, the reaction product is subjected to low-molecule removal treatment at a high temperature under vacuum, so that a low-viscosity room temperature vulcanized methyl silicone rubber product is obtained. According to the invention, on the basis of conventional viscosity room temperature vulcanized methyl silicone rubber production technologies, the method further makes the viscosity change of the reaction system one-way smooth by reducing the catalyst usage amount, lowering the reaction temperature condition, shortening the reaction equilibrium time, widening raw material loop ratio requirements and employing other technological means. The inorganic salt content of the catalytic system is reduced by 70% or more on year-on-year basis, the production efficiency is increased by 50% or more, the primary viscosity qualification rate reaches 95%, the product turbidity is 1.0 NTU or below, the Mw / Mn ratio is small and the hydroxyl value is high,and meanwhile, the dehydration process is optimized and product quality is stable.

The present invention relates to a processing method of low-sugar candied dates. The processing method comprises the following steps: selecting raw materials: selecting 100-120 parts of fresh dates without damages by insects, damages and cracks as a raw material; conducting sterilization and disinfection; conducting stone removing and surface scratching; preparing nutrient floating balls; and conducting ultrasonic moisture equilibrium, shaping, packaging and sterilization. The low-sugar candied dates are subjected to the ultrasonic moisture equilibrium; when ultrasonic waves diffuse in liquid,liquid micro-particles vibrate violently; small voids are generated inside the liquid; these small voids rapidly expand and close; the liquid micro-particles are violently impacted; a cavitation effect is used to shorten the moisture equilibrium time from 24 h to 10 h; and the moisture equilibrium efficiency is increased by 58%.

The invention relates to a preparation method for a mixed hemimicelle solid-phase extraction agent based on dimercaptosuccinic acid modified ferroferric oxide magnetic nanoparticles. The preparation process mainly comprises the four steps of preparation of ferroferric oxide magnetic nanoparticles, preparation of the dimercaptosuccinic acid modified ferroferric oxide magnetic nanoparticles, preparation of the mixed hemimicelle solid-phase extraction agent and a solid-phase extraction process. The synthetic method provided by the invention is simple and convenient, target object separation can be achieved just through little absorbing agents and short equilibrium time in the extraction process, the extraction capacity is high, lots of toxic and harmful solvents do not need to be used, and environmental friendliness is achieved; and meanwhile, influences of complex matrix effects of environmental samples can be effectively reduced, and the method is quite suitable for the rapid analyzing requirement of trace PPCPs compounds in complex matrixes.