43results about How to "Avoid underreaction" patented technology

The invention relates to preparation method for high water-soluble nano carbon tube, which comprises acidifying purifying treatment, acylchloridization and grafting. Wherein, based on not destroying its high length-diameter ratio and electron valence band structure, using chemical modification to graft lycine on wall and end of the tube to endow its high water-solubility of 30mg / ml and biocompatibility; reflowing the tube in HNO3 to remove the impurity metal catalyst particle and carboxylate the tube; then, reflowing tube in SOCl2 for completed acylchloridization; finally, acyl chloride group and amido in grafted lycine react to obtain the product.

The invention relates to a fluorescent powder material for light-emitting diode (LED) lighting and a preparation method thereof. A two-stage burning synthesis new technology is adopted for nitride andnitric oxide fluorescent powder for LED, so that two types of high-quality raw material powder, i.e., Si3N4 and AlN are prepared, and the nitride and nitric oxide fluorescent powder is further prepared. According to the fluorescent powder material for LED lighting and the preparation method provided by the invention, the influence rule of formula and process parameters on ingredients, structuresand performance of the prepared raw material powder and the fluorescent powder is systematically researched, and on the basis, through the process optimization, the Si3N4 and AlN raw material powder with low oxygen content and high activity, and the nitride and nitric oxide fluorescent powder with a complete crystal form and excellent light-emitting performance are prepared.

The invention discloses a method of adding B induction heating to eliminate the primary β grain boundary of TC4 alloy produced by laser additive material, comprising the following steps: step S1, drying B powder and titanium alloy powder in a vacuum environment, wherein the mass ratio of B powder is 0.01-0.2%; step S2, uniformly mix the dry B powder and titanium alloy powder obtained in step S1 to obtain a mixed powder; step S3, heat the base material to 900-1100°C, and use a laser additive manufacturing device on the base Formed samples on the material. The laser additive manufacturing TC4 primary β grain boundary can be eliminated, thereby refining its grains and improving the microstructure of the TC4 alloy.

The invention belongs to the technical field of plexiglass recovery, and specifically relates to a method for recycling waste plexiglass. The method uses cracking equipment, and the cracking equipment includes a furnace body, a stirring motor, a feeding module and a slag extractor. One side of the furnace body is There is an electric burner at the bottom, and a furnace in the furnace body. The stirring motor is fixedly connected to the stirring shaft through the gearbox; the stirring motor is set on the top of the furnace; the stirring shaft runs through the furnace and enters the furnace; Connected; there is a storage tank under the condenser; the bottom of the slag discharger is connected to the water tank through a pipe; the feeding module is installed in the upper right corner of the furnace body; the feeding module includes a feeding box, a driving motor, a driving roller, and a driven roller , cams, airbags, curved guides, mounting plates, blowing heads and automatic doors. In the present invention, the organic glass particles are projected to the middle and upper part of the furnace through the air bag, so that the organic glass particles are evenly dispersed, and the raw materials are not piled up in the furnace to cause insufficient reaction and affect the production efficiency.

The invention discloses waste gas treatment equipment for environmental engineering. The waste gas treatment equipment comprises a reaction box body; a sliding groove is formed in the outer ring of the upper surface of the reaction box body; a detection mechanism is arranged above the sliding groove; the two ends of an adjusting rope are connected to a compressed gas cleaning plate; a flow baffleis arranged in the reaction box body; a sliding column is arranged at the bottom of a storage box; and partition plates are arranged on the two sides of the middle of a catalytic bed. The waste gas treatment equipment has the advantages of being scientific and reasonable in structure and safe and convenient to use, a plastic film is fixed to the edges of the reaction box body through sealing rods,so that whether cracks exist at the edge position can be effectively known, the generation of the cracks of the reaction box body can be conveniently found in time, and the hidden danger in installation, the escape of pollution waste gas and the waste of heat energy can be avoided; and a rocking handle is rotated to enable sealing plates to drive the catalytic bed to rotate, the operation is simple and easy to carry out, workers can conveniently and quickly replace the catalytic bed inside the reaction box body, so that the situation that the environment pollution is caused due to the fact that the waste gas in the reaction box body escapes can be avoided.

The invention belongs to the technical field of water treatment materials, and discloses a quaternary amine modified straw material for removing nitrate in water body, a preparation method and application thereof. Dry at 60 °C for 24 h, pack in a sealed bag, and store in a glass desiccator; take the obtained straw, add 10% NaOH solution by mass, and carry out alkali pretreatment at room temperature for 2 h to obtain a treatment solution, which is dehydrated; Then add epichlorohydrin to the straw sample; slowly add ethylenediamine to obtain ethylenediamine-treated straw; add 30% trimethylamine solution by volume and react at 90 °C for 3 h; the product is adjusted with sodium hydroxide and hydrochloric acid to neutral, washed with ethanol and deionized water, and dried in an oven at 60° C. to obtain a quaternary amine modified straw material. The invention uses NaOH and ethylenediamine as main reagents, reduces the use of highly toxic reagents, and reduces the preparation cost of quaternary amine modified straw.

The invention discloses an environment-friendly cooling reaction kettle for chemical production. The environment-friendly cooling reaction kettle includes a supporting underframe, a reaction kettle main body is fixedly connected to the middle of the top end of the supporting underframe; a protective shell is fixedly connected to the middle of the outer side of the reaction kettle main body; one side of the supporting underframe is fixedly connected with a cooling oil tank. The top of the cooling oil tank is fixedly connected with a cold oil pump through an oil pipe; the input end of the cold oil pump is electrically connected with the output end of mains supply; one end of the cold oil pump is fixedly connected with a lower cooling oil pipe; a heat exchanger is fixedly connected to the bottom of one side, corresponding to the protective shell, of the top of the lower cooling oil pipe; according to the reaction kettle, the temperature of the reaction kettle can be slowly and quickly reduced through a temperature conversion mechanism, damage to the reaction kettle due to sudden temperature drop is prevented, the production safety of the reaction kettle is improved, the phenomenon ofenvironmental pollution caused by chemical agent leakage due to explosion of the reaction kettle is prevented, and the environmental protection performance of the reaction kettle is improved.

The invention relates to the technical field of zirconium and hafnium metallurgy, and discloses a solid-phase condensation recovery device for zirconium and hafnium metallurgy, which includes a base and a dehydration chamber. The upper part of the dehydration chamber is provided with thin tubes, and the inside of the dehydration chamber is fixedly installed with A fixed plate, the outer side of the fixed plate is provided with fine holes, the inside of the fixed plate is provided with a discharge port, the inside of the fixed plate is provided with a rotating plate, the outer side of the rotating plate is provided with a blocking column, the A second spring is fixedly connected below the blocking post. The solid-phase condensation recovery device for zirconium and hafnium metallurgy, when the rotating plate rotates, when the plugging column moves below the fine hole opened on the fixed plate, the blocking column moves up into the fine hole under the elastic force of the second spring, making the powder The water-absorbing agent will not fall, and as the rotating plate rotates, the plugging column squeezes the second spring and leaves the pores, and the water-absorbing agent falls through the pores and swayes to the lower part of the dehydration chamber, so that the powdery quicklime swayes in the dehydration chamber and is fully mixed with the dehydration chamber. The effect of water contact thereby absorbing water.