897results about How to "Short reaction time" patented technology

Method for preparing vegetable oil polyalcohol by continuous process

The invention discloses a method for preparing vegetable oil polyalcohol by a continuous process, which comprises the following steps: dissolving epoxy vegetable oil in an organic solvent, simultaneously pumping the epoxy vegetable oil dissolved in organic solvent and a catalyst water solution into a microchannel modular reactor, reacting at 30-100 DEG C under normal pressure for 2-12 minutes, standing the reaction product, skimming, recovering the water phase, washing the oil phase with an Na2CO3 water solution to a neutral state, skimming, and carrying out rotary evaporation to obtain the vegetable oil polyalcohol. The preparation method disclosed by the invention is operated continuously, and has the advantages of controllable preparation technique, short reaction time, green and environment-friendly raw materials, abundant sources, small pollution due to recyclable wastewater and organic solvent, low energy consumption, weakened side reaction, and wide controllable hydroxyl value of the product. The production plant is simple and easy to disassemble and assemble and convenient to carry and move, can be adjusted by simply increasing or decreasing the quantity of microchannels, and does not have the scale-up effect similar to industrial production.

Intelligent vehicle head-up display

The invention discloses a vehicle head-up display which comprises a sight tracking device, a sensor message receiver, an information processing center and a projector. The sight tracking device is used for acquiring the sight position of a driver and transmitting the sight position to the information processing center, the sensor message receiver is used for acquiring pick-up information of a vehicle sensor and transmitting the pick-up information to the information processing center, the pick-up information includes position information representing a road condition in front of a vehicle, the information processing center is used for selecting the best projection position within the sight of the driver or on the periphery of the sight on a front vehicle windshield without hindering the driver from observing the road condition according to the sight position of the driver and the pick-up information of the vehicle sensor, and the projector projects the information to the front vehicle windshield according to the best projection position determined by the information processing center. The vehicle head-up display can automatically select the best projection position on the front vehicle windshield according to the sight of the driver and the condition outside the vehicle, so that the area of the projected information is increased without affecting the sight of the driver.

Modification technique of synthetic resin impregnated timber

The invention relates to a technique for modifying synthetic resin impregnation wood and includes the following steps: 1. Preparation of impregnation solutions: liquid alkali is added into phenol at temperature of 42 to 45 DEG C and formaldehyde is added in succession at temperature of 65 to 80 DEG C, the mixture is kept for 3 to 4 hours at temperature of 70 to 85 DEG C and discharging is done after the temperature is reduced to less than 25 DEG C; 2. Impregnation: wood is added into an autoclave, and the vacuum is pumped in the pressure of 0.050 to 0.085Mpa, and the working solution of the impregnation solution is pumped in and pressure is added for 50 to 60 minutes in the condition of 0.7 to 0.9Mpa; 3. Solidification: the wood is placed into a baking oven, and the temperature rises to 90 DEG C after 3 to 4 hours and the wood is baked for 3 to 4 hours at temperature of 90 to 95 DEG C. The impregnation solution of the invention shortens the reaction time in synthesis process, improves the production efficiency, is stable in product quality and has good strengthening performance and processability; in the impregnation technique, the method for first reducing pressure and then increasing pressure is adopted, which causes the infiltration capacity of the synthetic resin to reach a stable amount and solves the problem of quality differences of the modified wood caused by different adsorption amounts of resin; compared with the solidification at temperature of 90 to 95 DEG C, the solidification at temperature of 100 to 105 DEG C causes the failure load and bending strength to increase, the wood not to embrittle and the processability to be good.

Joining the mixing and variable gas atomizing of reactive chemicals in flue gas cleaning systems for removal of sulfur oxides, nitrogen oxides and mercury

InactiveUS20100068111A1Short reaction timeIncreased time requirementCombination devicesGas treatmentAmount of substanceFossil fuel
Diverse methods of utilization and the corresponding, related modifications, of linear type, Variable Gas Atomization (VGA) nozzles and lances are described. Therein is joined the mixing and gas atomization of chemicals that react to form active products that further react with harmful flue gas constituents of combustion so as to enable their effective collection. One version combines, in a lance assembly of nozzles, the injection of reactants, in the form of finely divided dry solids conveyed in a carrier air stream, and the fine atomization of water, aqueous solutions or slurries. Atomization of such streams is employed to effectively wet the surfaces of the dry particles and, thereby, promote the rapid sorption of gaseous constituents of flue gas being treated. Another version simultaneously mixes and atomizes reacting chemicals to produce, and release into the flue gas stream, strongly oxidizing, transient, species of their reaction products. The simultaneous atomization and chemical reaction enables the effective capture of targeted flue gas constituents. An accompanying flue gas duct modification is described providing means for cost effective, high-performance system operation of linear VGA nozzle-lance arrays, as components of the various subject flue gas cleaning processes. The combination of linear VGA nozzle-lances and, as needed, flue gas duct enhancement, is intended to provide an economical and technically practicable means of retrofitting existing fossil fueled boilers of a wide range of capacities to meet future emission limits for SO2, SO3, NOx and mercury.

Acesulfame potassium synthesis section acylation reaction process

ActiveCN105198778AIncrease temperatureShort reaction timeSulfuric acid amide preparationDichloromethaneAcesulfame potassium
The invention discloses an acesulfame potassium synthesis section acylation reaction process. The process includes the following steps that a, a stirring machine of an acylation kiln and circulating cooling water flowing through a plate heat exchanger are started; b, objects obtained through the synthesis reaction of sulfamic acid and triethylamine are placed in an acylation kiln. C, dichloromethane and diketene with the volume ratio of 1 to 1 are evenly mixed, and a mixture of dichloromethane and diketene is dropwise added into the acylation kiln according to the ingredient amount, wherein the dropwise adding flow is 500 L/H; d, vaporized dichloromethane returns to a container for containing dichloromethane after passing through the plate heat exchanger, the mixture of dichloromethane and diketene is dropwise added into the acylation kiln, the acylation reaction temperature is raised, the reaction time is shortened, and the production efficiency is improved; meanwhile, dichloromethane is evaporated through the acylation reaction, evaporated dichloromethane is liquefied after being cooled through circulating cooling water, and liquefied dichloromethane returns to the container for containing dichloromethane to be recycled. The process is simplified, and the energy consumption is lowered.

Method for removing arsenic and antimony in industrial wastewater by using smelting furnace slag

The invention relates to a method for removing arsenic and antimony in industrial wastewater by using smelting furnace slag. The method comprises the following steps: adding acid to the industrial wastewater containing more than 10mg/L of As and more than 10mg/L of Sb so as to adjust the acidity, and controlling the pH to 0.5-4; adding the smelting furnace slag and an oxidizing agent, enabling the smelting furnace slag to chemically react with or physically adsorb As<3+> and Sb<3+> in the wastewater under acidity and oxidation atmospheres, controlling the temperature at 40-100 DEG C, and carrying out heat preservation reaction for 1-3 hours; adding a neutralizing agent for neutralization, and controlling the pH to 6-9; filtering a solution so as to obtain filtrate and filter residues, if the As contained in the filtrate is less than 0.3mg/L and Sb contained in the filtrate is less than 0.5mg/L, meeting the residue removal standards, feeding the filtrate to a wastewater treatment system for further purifying other impurities, if the As contained in the filtrate is more than 0.3mg/L and the Sb contained in the filtrate is more than 0.5mg/L, repeating the steps till meeting the residue removal standards, and sending the filtrate residues to a filter residue yard for storage. The method has the advantages that the smelting furnace slag is used for replacing a precipitant so as to remove impurities, the arsenic and the antimony in the wastewater are rapidly and efficiently removed within 1 to 3 hours, the removal rate is close to 100%, the method is high in efficiency and low in cost, and the filter residues have good crystal structures, are easy to clarify and filter and contain arsenate and antimonite formed by iron, calcium, magnesium, aluminium, pentavalent arsenic and pentavalent antimony and have stable chemical property.

Device and method for processing municipal utilities foul gas

The invention belongs to a technical field of waste gas treatment, in particular to a device used for treating the malodorous gas of municipal facilities and a method thereof. The device of the invention consists of a filter screen, a plasma reactor, a honeycomb activated carbon bed and a blower which are connected in sequence; wherein the plasma reactor adopts the structure form of a double medium barrier discharge plasma and is formed by the combination of a plurality of plasma reaction tubes; the honeycomb activated carbon bed is an absorption-catalysis oxidative bed and adopts the honeycomb activated carbon as a filling layer. The particles such as the dust in the waste gas are filtered out through the filter screen and enter into the plasma reactor, and a series of reactions occur to the malodorous matter in the bombardment of high energy electrons, and a little un-reacted malodorous matter is further treated through the honeycomb activated carbon bed. The blower which is arranged at the back of the device thus ensures the reaction device in negative pressure conditions so as to avoid the leakage of the malodorous gas. The device and the method provided by the invention have a large processing capacity of the malodorous gas and are high in processing efficiency.

Method for preparing graphene by rotationally shearing in electric field environment

InactiveCN104876211AShort reaction timeLow requirements for equipment and instrumentsCvd grapheneExperimental Devices
The invention discloses a method for preparing graphene by rotationally shearing in an electric field environment. Adopted experimental devices are a reaction container filled with electrolyte, high-purity graphite as a cathode, an inert electrode as an anode and a stirrer. The method comprises the following steps: switching on the cathode and the anode with a direct-current power supply, and stirring the electrolyte by using the stirrer; polarizing the cathode to strip the high-purity graphite under constant voltage, and simultaneously, stirring the electrolyte at a certain speed under the action of the stirrer, so that multi-layer graphene striped from the cathode is subjected to a shearing force again so as to prepare a solution containing graphene; cleaning the solution containing graphene for at least 5 times, ultrasonically dispersing, and centrifuging at a low speed; then, centrifuging a supernatant liquid of a prepared product at a high speed; and finally, drying to obtain graphene. The method disclosed by the invention is simple, convenient, rapid, safe, green and lower in cost; furthermore, natural graphene can be directly striped; due to the method, the traditional technology for preparing graphene by electrochemically striping is improved; and the yield and the quality for preparing a graphene film are increased.

Preparation method for maleic anhydride-grafted polypropylene

The invention relates to a preparation method for maleic anhydride-grafted polypropylene. The preparation method comprises the following steps: (1) uniformly mixing 0.4 to 2 parts of an initiator and 0.6 to 2 parts of styrene by weight; (2) adding 110 parts of polypropylene and 0.6 to 2 parts of maleic anhydride by weight into a high-speed mixing machine and mixing for 1 to 3 minutes, and meanwhile dropwise adding the product obtained by the step (1); (3) adding the product obtained by the step (2) into a double-screw extruder, blending, extruding, melting and grafting to prepare the maleic anhydride-grafted polypropylene. Compared with the prior art, the preparation method has short reaction time, simple preparation and low production cost, and is suitable for industrialization; an anti-oxidant is not required to be added; the effective reaction time can be prolonged by controlling the factors, such as the rotating speed of a main machine, the feeding rotating speed, the temperature and the like; meanwhile, the maleic anhydride-grafted polypropylene with high grafting rate can be obtained by adding the styrene, so that the grafting efficiency of maleic anhydride is improved; the preparation method does not have special requirements on the double-screw extruder, a liquid feeding device is not required, and the length-diameter selection range is large.

Method for preparing metal, metallic oxide or metallic hydroxide and carbon nano tube composite

The invention discloses a method for preparing metal, metallic oxide or metallic hydroxide and carbon nano tube composite. In the method, a carbon tube is ultrasonic-dispersed in solvent, a metal precursor is ultrasonic-dispersed in the solvent, and the dispersion solution are mixed uniformly and ultrasonically; under the ultrasonic action, the solution can react with reducing agent or aqueous alkali or ethanol and water, so as to obtain the metal, the metallic oxide or the metallic hydroxide and the carbon nano tube composite respectively. In the invention, by utilizing the reduction, oxidization and hydrolysis reactions of the metal precursor in the carbon tube dispersion solution under the ultrasonic action, the generated metal, metallic oxide or metallic hydroxide are directly loaded on the surface of the carbon tube, so as to prepare the metal, the metallic oxide or the metallic hydroxide and the carbon nano tube composite. The method has simple operation, short reaction time and easy realization; the reaction condition is mild without high-temperature high-pressure equipment; pre-modification treatment for the carbon tube is avoided, so as not to damage the electronic structure of the carbon tube; in addition, the higher load concentration can be achieved.
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