45results about How to "Reduce chemical reaction time" patented technology

The invention relates to a neutral blockage removing agent composition used for an oil recovery formation in an oilfield. The neutral blockage removing agent composition is prepared from the following raw materials in parts by weight: 10-14 parts of polyepoxysuccinic acid amine, 35-40 parts of diethylenetriaminepentaacetic acid amine, 33-37 parts of hydroxyl succinic acid amine, 20-25 parts of polyacrylamide, 7-10 parts of sodium polyaspartate, 10-14 parts of sodium gluconate, 10-15 parts of activated clay, 20-25 parts of potassium peroxodisulfate, 9-11 parts of hydroxyl butanedioic acid amine, 4-7 parts of sodium salicylate, 5-9 parts of hexamethylene tetramine, 0.2-0.3 part of vanadium pentoxide, 2-5 parts of starch, 5-8 parts of alpha-sulphonated fatty acid methyl ester and derivative thereof (MES) and 0.1-0.3 part ofdiethyl ethanolamine. The neutral blockage removing agent composition is used for the blockage removal of an oil pumping well and a screw pump well in the oilfield, can effectively solve the problems of cleaning blockage removal of the oil pumping well and the screw pump well in the oilfield and the corrosion of oil recovery equipment, has high blockage removing speed, is neutral and is free of corrosion; waste liquid for blockage removal can be degraded and does not need to be discharged onto the ground to be subjected to sewage treatment, no corrosion, dead angle, precipitation or secondary well blockage are generated, and more safety and more reliability are realized as compared with traditional pickling blockage removing, biological blockage removing and solvent blockage removing.

The invention discloses a preparation method of room-temperature ball-milling solid phase chemical reaction of rare earth mixing with nano stannic oxide, relates to a preparation technology of the rare earth mixing with the nano stannic oxide, which can be applied for antistatic coating, plastics, fibre and other fields. Inorganic salts containing stannum and rare earth are taken as reactants, oxalic acid, ammonium carbonate, ammonium bicarbonate, sodium oxalate or sodium carbonate is taken as a ligand, the processing steps are sequentially dosing, mixing and preparing precursors of the room-temperature ball-milling solid phase chemical reaction, and the targeted product can be obtained after impurity removing, drying and thermal decomposition. The preparation method is characterized in that the reaction process does not use water, the stannum ion can be prevented from hydrolysis, uniform mixing can be realized, a solid phase reaction system is broken by utilizing the shearing force and the impact force generated during the ball milling process, the specific surface area of the reactant is increased, the reaction rate is increased, micro-fine and uniform precursors can be prepared, then the processes of cleaning, drying and controlling the thermolysis temperature and time are carried out, and thereby the rare earth mixing with nano stannic oxide powder, the particle size distribution of which is 30 to 80nm and has controllable morphology, can be obtained.

A nano rare-earth oxide is prepared from the inorganic salt of rare-earth element (Ce, La, Pr, Nd, or Tb) and ligand (oxalic acid, sodium oxalate, dicarbonate, 8-hydroxyquinoline, complexon, etc) through proportioning, mixing, and ball grinding while solid-phase chemical reaction to obtain precursor, removing impurities, drying, and medium-temp thermal decomposition. Its advantages are simple process, low cost, saving energy, high purity (more than 99%) and narrow size distribution (10-30 nm).

The invention relates to a method for synthesizing titanium silicide (Ti5Si3) granule in original position to intensify the composite material based on titanium carbide aluminum (Ti3AlC2). Adding a certain amount of silicon, to prepare the Ti3AlC2/Ti5Si3 composite material of different volume ratio, the volume percentage of the titanium silicide granule is 10-40%. The specific preparing method comprises: employing titanium powder, aluminium powder, silicon powder and graphite powder as raw material, the mole ratio of Tií†Alí†Sií†C is 3: (1.1-x): (1.8~2.0), and x is 0.1-0.5, mixing the raw material powder with physical-mechanical means for 8-24 hours, loading into the graphite mould, the forced pressure is 10-20 Mpa, calcinating in the heating furnace under protective atmosphere, the heating-up speed is 10-50 Deg C/min, the calcining temperature is 1400-1600 Deg C and lasting for 0.5-2 hours, the calcinating pressure is 20-40 Mpa. The titanium carbide aluminium /titanium silicide of high purity and high intensity can be produced under lower temperature and in shorter time by applying this invention.

The invention relates to a ceramic-matrix composite material as well as a preparation method thereof, in particular to a titanium zirconium carbide particle reinforced silica-alumina titanium zirconium carbide matrix composite material and a preparation method thereof. A zirconium titanium carbide particle reinforced silica-alumina titanium zirconium carbide solid solution adopting the in-situ synthesis has a zirconium titanium carbide particle reinforced phase with the volume percentage of 5 to 30 percent; and the preparation method comprises: firstly, taking a titanium powder, a zirconium powder, a silicon powder, an aluminum powder and a graphite powder as raw materials, mixing the materials by a physical mechanical method for 10 to 25 hours, putting the materials in a graphite mould for cold briquetting, with the exerted pressure of 5 to 20MPa, and sintering the materials in a hot pressing furnace input with a protective atmosphere, with a rate of rise of temperature of 5 to 50DEG C/min, a sintering temperature of between 1400 and 1650 DEG C, the sintering time of 0.5 to 2 hours, and a sintering pressure of 20 to 40MPa. The composite material and the method can prepare the titanium zirconium carbide particle reinforced silica-alumina titanium zirconium carbide matrix composite material with excellent combination properties such as high purity, high density, high hardness, high toughness and high-temperature mechanical property under rather low temperature and in a short period of time.

The invention relates to a method for synthesizing silicate green fluorescent powder for a white light emitting diode (LED), and belongs to a technology for preparing rare-earth fluorescent powder. The chemical formula of the fluorescent powder is Ca2-xMgSi2O7:xEu<2+>, wherein x is more than 0 and less than 0.1. The method comprises the following steps of: weighing the required alkali earth metal compound, silicic acid, europium nitrate, an appropriate amount of surfactant and a flux in a stoichiometric ratio; fully mixing the alkali earth metal compound, the silicic acid, the europium nitrate, the surfactant and an appropriate amount of ligand, performing ball milling, and adding an appropriate amount of lubricant during ball milling; performing suction filtering, washing, and drying to obtain a precursor; and mixing the precursor and the flux, and calcining in reducing atmosphere to obtain the required fluorescent powder. The fluorescent powder prepared by the method is large in excitation wavelength, high in luminous intensity and crystallinity, narrow in particle size distribution and suitable to be used as the green fluorescent powder for the white LED.

The invention discloses a preparation method of starch sodium octenyl succinate. The method comprises the following steps: (1) starch pretreatment: preparing starch and deionized water into a starch milk solution, carrying out ultrasonic treatment on the starch milk solution in an ice-water bath by using an ultrasonic cell disruptor, carrying out suction filtration on the pretreated starch milk, and drying for later use; and (2) synthesis of starch sodium octenyl succinate: adding deionized water into the starch treated in the step (1) to prepare starch milk, diluting octenyl succinic anhydride with absolute ethyl alcohol, slowly adding the diluted octenyl succinic anhydride into starch milk, performing esterification reaction while stirring, controlling the reaction temperature to be 30-35 DEG C and the pH value to be 8-8.5, regulating the pH value of the system to be 6-6.5 after the reaction is finished, stopping the esterification reaction, performing suction filtration and washing on reactants with ethyl alcohol, performing centrifugal washing with distilled water, drying, crushing and sieving to obtain OSA starch. The method is simple in process, mild in process condition, short in production period, high in product substitution degree and high in synthesis efficiency.

The invention provides a liquid-liquid reaction experimental apparatus based on hydraulic rotary spraying, comprising a reaction cylinder, a cylinder cover, and a liquid incoming pipe. The liquid incoming pipe is passed into the cylinder cover from outside and extended into the reaction cylinder; the bottom end of the liquid incoming pipe is provided with a connection terrace; a rotary spraying mechanism is arranged in the connection terrace. The rotary spraying mechanism connected with the liquid incoming pipe is arranged in the reaction cylinder herein; the liquid incoming pipe is connectedwith a miniature water pump; the rotary spraying mechanism sprays a liquid reaction material to the reaction cylinder in rotational manner under the action of liquid pressure, the liquids in the reaction cylinder is driven in compound multidirectional motions, such as vertical motion, anticlockwise and clockwise motions and rolling; contact area is effectively enlarged for the liquid reaction materials; mixing is uniform; reaction is complete. The spraying rate of liquids can be flexibly adjusted by adjusting the power of the miniature water pump, so that reaction rate can be effectively adjusted. Observing the reaction process is convenient for experimental personnel; operation is mechanically automated; experimental data are precise; safety is high.

The present invention relates to a preparation method of 1, 4-dioxane alkone, and provides a highly efficient, rapid method of preparing high-purity 1, 4-dioxane alkone, which has no heavy metal ions. In the method, glycol and chloroacetic acid or the chloroacetate are used as raw materials. The method is characterized in that the intermediate beta-hydroxyl ethoxy acetate of the 1, 4-dioxane alkone is synthesized in one step, and the 1, 4-dioxane alkone can be produced through acidification and ring formation. Because the beta-hydroxyl ethoxy acetate is synthesized in one step, the present invention has the advantages that the reaction time is greatly shortened, the reaction yield is improved, and the production cost is reduced.

The invention discloses a quick reaction technology and a production system for deflazacort. The production system comprises a reaction kettle, an elutriation kettle, centrifugal filtering equipment, a concentration kettle, drying equipment and a discoloring kettle which are mutually connected according to procedures, wherein the reaction kettle comprises a tank body, and an interlayer cavity is arranged at the outer wall of the tank body; a temperature adjusting tube is arranged in the tank body; a stirring shaft is arranged at the center of the interior of the tank body; the upper end of the stirring shaft is connected with a magnetic coupling rotary device, and a stirring impeller is arranged at the lower end of the stirring shaft; a rotary cylinder is arranged on the stirring shaft; a buoyancy impeller is arranged on the rotary cylinder; a lifting tray is arranged at the upper end of the buoyancy impeller; a circular hole is formed in the lifting tray; water filtering holes are uniformly distributed in the lifting tray; a vertical slide groove is arranged in the outer wall of the rotary cylinder; a rolling shaft is arranged at the inner wall of a base of the buoyancy impeller; an upper key board is arranged at the upper end of a rotary cover of the stirring impeller; a lower key board is arranged at the lower end of the rotary cylinder. The production system and the technology have the advantages that the multi-azimuth flowing of reaction liquid is realized, the reaction time of the deflazacort in each step is shortened, and the quick production of the deflazacort is realized.

A camping multi-fuel warming stove comprises a stove body. A movable oil-fired hearth is arranged inside the stove body. A plurality of gas inlets are formed in the wall of the oil-fired hearth. A gasification device for enabling fuel oil to be evaporated and gasified is arranged inside the oil-fired hearth. A movable coal-fired hearth is sleeved with the oil-fired hearth. An ash outlet is formed in the lower portion of the stove body. A stove panel is arranged at the upper portion of the stove body. A smokestack base is arranged on the stove panel. A coal adding opening is formed in the side wall of the stove body. When oil is fired, the coal-fired hearth is taken out, and the oil-fired hearth and a fire gathering cover are placed in; when coal or firewood is fired, the oil-fired hearth is taken out, and the coal-fired hearth is placed in; and various liquid and solid fuels such as diesel oil, coal oil, coal, firewood and excrement can be used, the fuel adaptability is high, the good combustion effect can be ensured at the areas with the altitude being 4500 m, the high-altitude adaptability is good, the thermal efficiency is high, and the duty assurance capacity is strong. The camping multi-fuel warming stove is applicable to a plain area, low in manufacturing cost and using and maintenance cost and stable and reliable in performance.