65results about How to "Removed in time" patented technology

The invention relates to catalysts, in particular to a catalyst for preparing arene from synthesis gas through one-step conversion and a preparation method of the catalyst. The catalyst is prepared from, by mass, 30%-70% of zirconium-containing perovskite, 30%-60% of multistage porous zeolite molecular sieve and 0.1%-10% of oxide additive. The preparation method comprises the steps that 1, a salt compound of at least one of IA, IIA, VB, VIB, VIIB, IIB and IVA family elements and rare earth elements is weighed according to the components of the catalyst and added into water or alcohol to be prepared into a solution A; the multistage porous zeolite molecular sieve is weighed and added into the solution A, suction filtration, washing and filter cake drying are carried out to obtain solid powder, then the solid power and the zirconium-containing perovskite are mixed, ground and calcined, hydrogen or mixed gas of hydrogen and inert gases is introduced, heating is carried out for reduction, the reduced solid sample is tablet molded, and the catalyst is prepared.

The invention relates to a kind of efficient reactor with paddle bed, which belongs to the chemical machinery field. It is composed mainly with the solid and liquid separator, the inner tube that the track is changeable, the reactor cover, the heat exchanger with an internal component, the riser with the spray nozzle, the inner-tube tank that has the heating and gas distribution function, the spray nozzle for protecting from choking, the mounting plate of the spray nozzle, the heat exchanger, the outlet of the heating coil, the quadratic distribution plate, the heating coil and so on. The beneficial effictiveness of the invention can be described as follows: the reactor and the distributor can't block up easily; the gas and the liquid can be mixed evenly; the reactive efficiency is high; the carrying amount of the catalyst and the solvent is so bit that it can not occur the bias current, channeling and dead bed; the size running quickly, and the viscosity of the size in the reactor is identical generally; the reactor can be shifted out in time, and especially in the stage of the catalytic, reducing and intensifying, it can realize to operate the reactor steadily; otherwise, the distribution of the virgin gas in the reactor along the axle is in agreement on the concentration of the catalyst, so that can make the catalyst have the most activity, and then it can be make the full use of the reactor space.

The invention provides a method for preparing p-chlorotoluene and o-chlorotoluene by toluene chlorination. The method comprises the following steps that: after raw material toluene is dried in a drier, the raw material toluene and chlorine are directly chlorinated in the presence of a catalyst so as to obtain mixed chlorotoluene, by-product hydrochloric acid and minor residual; and the mixed chlorotoluene obtained by the chlorination process is used as a raw material to be delivered to a process for separating the mixed chlorotoluene so as to obtain the o-chlorotoluene, the o-chlorotoluene and minor residual liquid through precise fractionating. By the method, a tower type fixed bed circulating chlorination process ensures that gas and liquid are contacted more sufficiently, reaction heat energy can be removed in time, so the reaction effect is better, side products are reduced, and the problem of environmental pollution caused by leakage of chlorine hydride gas in a positive pressure or normal pressure system in the prior absorbing process can be solved. Generation of wastewater is prevented, a rectifying separation mode of two serially connected towers reduces assembly height of the tower and improves separation efficiency, and purities of final products, namely p-chlorotoluene and o-chlorotoluene are both more than or equal to 99.9 percent by weight.

The invention discloses a production method for preparing an m-nitrobenzenesulfonic acid by a tubular sulfonation reactor and relates to the production method of a chemical product. A production device comprises a nitrobenzene storage tank (1), a sulphur trioxide storage tank (2), the tubular sulfonation reactor (3), a kettle sulfonation reactor (4), a material delivery pump (5), a spraying pump (6), a connecting pipeline and accessories (a valve, a flow meter, a thermometer, an anti-explosion film, sight glass and the like). Nitrobenzene and a sulphur trioxide sulfonating agent enter the tubular sulfonation reactor (3) in proportion, the tubular sulfonation reactor (3) and the kettle sulfonation reactor (4) are used in series, or the tubular sulfonation reactor (3) is used independently.The invention is applied to continuous or discontinuous sulfonation reaction, good in mixing and heat transfer effects, high in reaction speed, high in production efficiency and high in operational flexibility. The production device and the production method which are provided by the invention are applied to various sulfonation reaction production processes.

The invention relates to a method and a device for recycling silicon tetrachloride, which are characterized in that preheated silicon tetrachloride and water vapor are continuously and steadily loaded into a reactor to react according to a molar ratio of 2.0-5.0:1.0 so as to generate hydrogen chloride gas and silicon dioxide powder. The hydrogen chloride gas is recycled after being dried, and the silicon dioxide powder can be used as a product for sale after being treated in a subsequent handling. The device for recycling the silicon tetrachloride is a gas-solid fluidized bed reactor and comprises a fluidized bed cylinder, a water vapor gas inlet, a water vapor gas distributor, a silicon tetrachloride gas distributor, a tubular type heat exchange tube, a cyclone separator, a silicon dioxide powder discharge port and the like. The method and the device have the advantages of short process flow, low energy consumption, less equipment investment, easily controlled operation and the like.

The present invention discloses an unsaturated acetal preparation method. According to the preparation method, an unsaturated alcohol and an unsaturated aldehyde are subjected to a reaction in a pre-reactor to achieve a thermodynamic equilibrium, and then enter a tower type reactor, a water carrying agent is subjected to gasification through a gas generator, and then is subjected to reverse contact with a reaction liquid, and the water generated from the reaction is removed, such that the unsaturated alcohol and the unsaturated aldehyde are subjected to a continuous condensation reaction to prepare the unsaturated acetal. The preparation method has the following characteristics that: the method can be performed under a normal pressure condition, the reaction temperature is constant, low cost synthesis of the unsaturated acetal can be achieved, particularly 3-methyl-2-buten-1-ol and 3-methyl-2-butenal can be adopted as raw materials to synthesize 3-methyl-2-butenal-1 diisopentenyl acetal, wherein the compound is an important intermediate of a synthetic perfume citral.

The fluidized bed reactor for preparing vinyl chloride through reaction between hydrogen chloride and acetylene and preparation process belongs to the field of chemical technology. The fluidized bed reactor includes fluidized bed, reactant material gas inlet, heat exchange pipes, member, cyclonic separator, reacted gas outlet, catalyst feeding port and catalyst removing port connected successively to the wall of the fluidized bed. After the catalyst in the molar ratio to the reactant material of 1.01-1.1 to 1 is fed, hydrogen chloride and acetylene are introduced are converted through reaction into vinyl chloride completely, and the reacted product is made to enter the post equipment through the gas outlet. The present invention has simple reaction member, high bubble crushing effect, low catalyst loss, greatly strengthened gas-solid contact, high vinyl chloride product purity and other advantages.

The invention discloses a filtering device facilitating clearing of filter residue for chemical industry. The filtering device comprises a bottom plate, a cylindrical cylinder is fixed to the top of the bottom plate, and a through hole is formed in the side face of the cylindrical cylinder; a frame and a filtering net are arranged inside the cylindrical cylinder, the filtering net and the inner wall of the frame are fixed, and a rotating rod is fixed to the outer side of the frame and penetrates through the through hole; a driven gear is fixed to the end, away from the frame, of the rotating rod, a supporting frame is fixed to the top of the bottom plate, and a motor is fixed to the top of the supporting frame; and a driving gear is fixed to an output shaft at the output end of the motor,an opening is formed in the side face of the cylindrical cylinder, and a fixed pulley is fixed to the inner bottom of the opening. According to the filtering device, by reversely rotating the filtering net, solid impurities fall from the filtering net through gravity, the filtering efficiency is acceleratedimproved, meanwhile, the solid impurities are quickly transferred through a movable groove plate, and thus the clearing efficiency is improved.

The present invention provides a new method for preparing o-nitro anisole by using a micro-channel reactor, particularly application of a micro-channel reactor with an enhanced mass transfer unit structure to carry out a continuous flow o-nitro chloro benzene etherification reaction. According to the present invention, the mass transfer and the heat transfer can be completed dependent on the kinetic energy of the fluid without the mechanical stirring process under the reactor operation condition higher than the normal temperature, the space time reaction rate of the micro-channel reactor can be substantially improved, the temperature fluctuation and the concentration fluctuation during the reaction process can be avoided, the phenomena such as temperature runaway and overheating do not exist, and the reaction process is safe.

The invention discloses an elevator control system and elevator equipment. The elevator control system comprises a light curtain data acquisition module, a light curtain imaging drawing module, an electric vehicle identification module and an elevator work control module; the light curtain data acquisition module is used for acquiring signals received by each receiver of a light curtain; the lightcurtain imaging drawing module is used for drawing an image according to the signals acquired by the light curtain data acquisition module; the electric vehicle identification module is used for comparing the image drawn by the light curtain imaging drawing module with a set image in a database to identify whether the vehicle is an electric vehicle; and the elevator work control module is used for controlling the running state of the elevator equipment according to the identification result of the electric vehicle identification module. According to the elevator control system and the elevator equipment, the situation of a battery car entering the elevator can be monitored in real time, and it is ensured that the imaging situation of the electric car entering the elevator can be accurately displayed when the electric car enters the elevator; and elevator passengers can be prompted to forbid the electric vehicle from going upstairs, so that fire safety of residents is guaranteed.

The invention discloses a soil layer drilling device, and belongs to the technical field of soil sampling. The soil layer drilling device comprises a box body, and a spiral blade is sleeved with the side wall of the box body. The device further comprises a rotating block and a lifting column, the rotating block is rotationally connected to the interior of the box body, the inner wall of the rotating block is connected with a collecting ring column, a collecting chamber is formed in the inner wall of the collecting ring column, the lifting column is connected to the interior of the box body, the lifting column and the rotating block are connected through a threaded strip, one end of the lifting column is arranged in the collecting chamber, and a closer is connected to the bottom of the rotating block. When soil is collected by the device, the soil cannot be scattered, the collecting effect is good, the soil can be conveniently taken out from a sampler, and the device is convenient to carry.

The invention discloses an ester-exchange reaction device. The ester-exchange reaction device comprises a reaction kettle, a rectifying tower, a condenser, an azeotrope storage tank and an entrainer, wherein the reaction kettle is communicated with the rectifying tower by a pipeline; the condenser is communicated with the top part of the rectifying tower by a pipeline; the azeotrope storage tank is respectively communicated with the top part, the middle part and the bottom part of the rectifying tower by a feeding pipe at the top part of the rectifying tower, a feeding pipe at the middle part of the rectifying tower and a feeding pipe at the bottom of the rectifying tower. Due to adoption of the technical scheme, the ester-exchange reaction device disclosed by the invention can overcome the defects that the by-product (alcohol) is not removed in time, the removing speed of the by-product (alcohol) is slow, the reaction conversion rate is not high and the reaction time is longer in the existing production process of ester-exchange reaction, the simple and effective ways are provided for increasing the reaction conversion rate, shortening the reaction time, reducing the energy consumption and lowering the material consumption.

The invention relates to a polyvinyl chloride, in particular to a production method of the polyvinyl chloride with a small pot suspension method, belonging to the technical field of chemical industry, characterized in that: EHP (peroxydicarbonate-diethylhexyl ester) which has high activity, uniform heat generation, and light sticking is used, based on using the EHP, a composite initiator is used, heat exchange capability of the kettle is fully utilized to allow the reaction speed to be uniform, prevent the acceleration of the post reaction speed to guarantee the timely removal of polymerization heat, and reduce the polymerization time; a composite system of binary PVA (polyvinyl alcohol) with different alcoholysis degrees and a polybasic composite system of HPMC (hydroxypropyl methyl cellulose) and PVA are used; and a secondary water injection technology is used, so that viscosity of the materials is reduced, the heat removing capability of the polymerizing pot is improved, and the quality of the PVC products is increased. According to the invention, the polymerization time is reduced, the viscosity of the materials is reduced, the cleaning time of the polymerizing pot, and a low water-oil ratio can be used for filling, so that the production capacity is improved.

The invention discloses a built-in high-efficiency tube nest reaction heat exchange device which is suitable for the fields of reaction equipment needing forced heat exchange, such as chemical engineering, petroleum, foods and power. The built-in high-efficiency tube nest reaction heat exchange device has the main structure that heat exchange tube nests are firstly arranged and connected to a tube plate in a U shape or straight pipe shape, and the tube plate and the heat exchange tube nests are arranged in a reaction kettle; for increasing the heat exchange efficiency, the tube plate and the heat exchange tube nests can be connected to a heat conducting medium pipe, and the heat conducting medium pipe is used for inputting a heat conducting medium pipe into a reaction kettle through a kettle casing and is connected with all heat exchange tube nests through the tube plate.

The invention discloses a bottom plate rock roadway layer penetrating drilling hydraulic slag discharging efficient cleaning system and method, and relates to the technical field of coal and gas outburst prevention and treatment. An extraction device, a coal water separation device, a filter pressing device and a transportation device are included. The extraction device comprises a drilling machine and an extraction pipeline. A coal water extracting and releasing pipe of the extraction pipeline is connected with the coal water separation device. A coal water separation bin of the coal water separation device is connected with a filter pressing pump of the filter pressing device through a coal unloading pipe. After the filter pressing device extrudes coal slime, the transportation device isused for conveying coal cakes. When the system works, the drilling machine is used for drilling, then, the extraction pipeline is installed, coal-water-gas mixture is extracted and released, gas is collected through a gas extracting and releasing pipe, and the coal water mixture enters the coal water separation device. The coal water separation device separates coal and water, and residual gas iscollected. After the coal slime enters the filter pressing device, the coal slime is extruded into the coal cakes and then conveyed out through the transportation device. According to the system andthe method, the coal-water-gas mixture can be efficiently separated, and the gas extraction operating efficiency is improved.

The invention discloses a treatment method of high-salt solid waste containing organic matters; the treatment method comprises the following steps of: conveying high-salt solid waste containing organic matters to an incinerator for incineration, wherein the incineration temperature is 1000-1300 DEG C; generating waste smoke and salt after incineration; through an exhaust gas treatment process, theseparated CO2 gas of the waste smoke enters an alkali making process for recycling; the waste salt can obtain saturate sodium chloride solution by a waste salt treatment process to enter alkali making reaction for recycling; the heat in the waste smoke and waste salt is supplied to power generation through a part of the smoke heat exchanger and the waste salt heat exchanger, and the other part isused for alkali production reaction. The treatment method provided by the invention can treat the high-salt solid waste containing organic matters by an incineration method; the high-salt solid wastecontaining organic matters can be subsequently converted into a series of chemical productsAt the same time, the heat generated by the incinerator is used for supplying each application section during the whole process, and the whole process is energy-saving and efficient.

The invention provides an optical path device supporting multi-station automatic switching and fine tuning of lamp sources. The device comprises a mounting fine tuning device and a power output device; a multi-station flange in the mounting fine tuning device is a disc with a central hole; a plurality of light source mounting seats are symmetrically arranged; and a rotary support shaft penetratesthrough the central hole of the flange. The power output device can drive the multi-station flange to rotate by rotating the supporting shaft and drive the light source to rotate to reach a designatedposition. The invention also provides a gas-phase molecular absorption spectrograph comprising the optical path device. According to the invention, the light source can be automatically selected to reach the designated to-be-detected position, and the fault light source can be moved out of the designated to-be-detected position at any time; meanwhile, a stepping motor is matched with an infraredoptical coupling induction technology, and the position of the lamp source installed on the multi-station flange plate is accurately and finely adjusted.

The invention provides a construction waste multi-stage screening and sorting device, and the device comprises a box body, a hopper and supporting legs; a first conveyor is installed on the inner sideof the box body, a second conveyor is arranged at the top of the first conveyor, an electromagnet is installed on the inner side of the second conveyor, and a metal detector is installed on the innerside of the box body through bolts; a first motor is installed on one side of the metal detector, a guide rod is installed on the first motor, and a roller is installed at the bottom of the first conveyor. According to the invention, iron can be moved out in time, the screening efficiency is improved, balls can be effectively used for reducing friction force, and the safety of the second conveyorand an electromagnet is protected; a filter cartridge can be effectively and automatically cleaned, the filter cartridge can be effectively prevented from being blocked, dust can be effectively pressurized into blocks and cannot be blown up again by wind, air is prevented from being polluted again by the dust in the conveying and cleaning process, and the device is suitable for multi-stage screening and sorting of construction waste.

The invention provides a method for preparation of xylose and co-production of sodium sulfate by employing a viscose fiber squeeze liquid as raw material. The method comprises the following processing processes: neutralizing the viscose fiber squeeze liquid by using sulfuric acid, carrying out acidolysis, decoloration and concentration, and removing ions through a crystallization process; carrying out primary crystallization to obtain sodium sulfate coarse crystal and a primary crystallization mother liquor; carrying out recrystallization on the primary crystallization mother liquor to obtain sodium sulfate coarse crystal and a secondary crystallization mother liquor; dissolving the sodium sulfate coarse crystal obtained through two times of crystallization, then carrying out recrystallization, centrifugal separation and drying to obtain a sodium sulfate crystal product; concentrating the secondary crystallization mother liquor, removing the ions through a continuous automatic ion exchange method and then separating and purifying xylose by using a simulated moving bed chromatographic separation device to obtain a xylose solution and a hybrid syrup solution; and carrying out concentrating, crystallization, centrifugal separation and drying on the xylose solution to obtain a xylose crystal product.