489results about How to "Easy to pollute" patented technology

The present invention relates to a press-type liquid pump. The liquid pump comprises a fixed unit fixed relative to a container and a movable unit capable of performing a reciprocating motion relative to the fixed unit, and a liquid product is pumped to the exterior of the container. The reciprocating motion is achieved by a pressing force applied by a user to the movable unit to move the movable unit relative to the fixed unit in combination with an elastic restoring means for restoring the movable unit relative to the fixed unit after the pressing force is removed. The elastic restoring means is a plastic elastic compressing means located below a toothed sleeve and installed between the fixed unit and the movable unit, which comprises at least one elastic strip generally formed in an arc shape.

A three-dimensional object forming apparatus for forming a three-dimensional object includes: a base platform; a transmission portion; a detachable construction tank; a movable powder supplying tank provided for driving to supply construction powder above the detachable construction tank; a print module including at least a print cartridge with at least a nozzle; a heating portion; an lifting portion arranged below the detachable construction tank; a nozzle cleaning module; a nozzle sealing module having a holder, at least a sealing portion and a moisture portion; and a stretchable dust-proof cover connected to a side of the powder supplying tank, which is provided for moving together with the powder supplying tank to cover the construction powder in the construction tank.

The invention relates to a disposable cystoscope sheath. To solve the problem of mutual cross-infection during medical inspection. The technical solution adopted is: a disposable bladder inspection mirror sheath, including a sheath tube, a sheath main body, an instrument valve, a short bridge, a water inlet valve and a water outlet valve, and it is characterized in that: said sheath tubes are provided with independent speculum cavities And the instrument channel, the front end of the speculum cavity is provided with a transparent window for sealing the speculum cavity, the front end of the instrument channel is open, the front section of the instrument channel is curved, and forms a certain angle with the front section of the speculum cavity; It is connected with the instrument channel and the main body of the sheath, and the speculum cavity is connected and communicated with the short bridge connected in the main body of the sheath; one end of the instrument valve is inserted in the main body of the sheath, and the other end of the instrument valve is equipped with a rubber cap; the main body of the sheath is provided with an inlet The water valve and the water outlet valve; the water inlet valve, the water outlet valve, the instrument channel and the main body of the sheath communicate with each other. The invention creates an integrated structure, which is simple and convenient to operate, economical, practical and safe.

The invention relates to a nitrogen increasing method for nitrogen-bearing pure steel. The invention comprises the following steps: nitrogen increasing is performed to the melted steel in a steel ladle at the final stage of the second refining of nitrogen-bearing pure steel by adopting the method of nitrogen gas blowing to a steel ladle bottom; after nitrogen blowing, argon gas is blown to the melted steel immediately, to clean the melted steel. The nitrogen gas and the argon gas are respectively conveyed to the steel ladle bottom through two pipes. Through the cleaning argon gas after nitrogen gas is blown, the invention enables the foreign impurities in the melted steel to be removed to produce pure steel material, and the method can increase the nitrogen content of the melted steel at low cost, and simultaneously satisfy the request of the melted steel of the pure alloy steel to the purity thereof.

The invention discloses a pulse laser etching device used for a transparent electroconductive thin film and a control method of the pulse laser etching device. The pulse laer etching device comprises a vacuum platform used for adsorbing a film material, a laser and a galvanometer, a beam expander is arranged between the laser and the galvanometer, a CCD image sensor is arranged above the vacuum platform, an air blowing device is arranged on one side of the vacuum platform, and a dust collecting device is arranged on the other side of the vacuum platform. The high-frequency short-pulse laser is adopted as a laser source for laser etching, film material etching is completed through the small-breadth galvanometer, and generated dust is collected through an air blowing system and a dust collecting system, so that the defects of high cost, low efficiency, large processing limitation, serious pollution and the like in the prior art can be overcome, etching process can be simplified, and accuracy can be improved.

The invention relates to a disposable urinary bladder sight glass sheath for solving the problem of cross infection during a medical inspection. The adopted technical proposal is as follows: the disposable urinary bladder sight glass sheath comprises a sheath tube, a sheath body, an instrument valve, a short bridge, a water inlet valve and a water outlet valve. The disposable urinary bladder sight glass sheath is characterized in that: a sight glass cavity and an instrument passage independent from each other are arranged in the sheath tube, a transparent window for closing the sight glass cavity is arranged on the front end of the sight glass cavity, the front end of the instrument passage is of an open type, and the front section of the instrument passage is bent and forms a certain angle with the front section of the sight glass cavity; the sight glass cavity and the instrument passage are connected with the sheath body, and the sight glass cavity is connected and communicated with the short bridge arranged in the sheath body; one end of the instrument valve is inserted into the sheath body, and the other end of the instrument valve is provided with a valve cap; the sheath body is provided with the water inlet valve and the water outlet valve; the water inlet valve, the water outlet valve and the instrument passage are communicated with the sheath body. The disposable urinary bladder sight glass sheath has an integrated structure with simple and convenient operation, economical efficiency, practicability and safety.

The invention discloses an animal feed additive and a preparation method thereof. The animal feed additive is prepared from the following raw materials in parts by weight: 5-10 parts of corn fiber, 15-20 parts of soybean curb residue, 12-15 parts of zeolite powder, 40-60 parts of corn sugar residue, 1 part of compound biological active enzyme, 1 part of saccharomycetes, 1 part of lactobacillus, 1 part of bacillus and 1 part of bifidobacterium, wherein the compound biological active enzyme comprises the following components: 20,000 IU / g of xylanase, 10,000 IU / g of pectinase, 400 IU / g of cellulose and 200 IU / g of protease. The preparation method comprises the steps of raw material weighing, pre-processing, mixing, dual fermentation and packaging. The animal feed additive disclosed by the invention can be used for improving the digestibility to promote the growth and development of animals, regulating the gastrointestinal micro-ecological balance to enhance animal immunity and improve disease resistance, improving animal feed intake, improving the cultivation environment to reduce respiratory diseases, and improving the quality and quantity of cultivated products.

The invention belongs to natural enemy insect predacious stink bug raising technology field, more specifically a method for raising natural enemy insect southern minute pirate bug indoor in great deal and a raising box. The raising method comprises the steps of southern minute pirate bug adult and nymph raising; the existing southern minute pirate bug raising method is improved based on the biological characteristics of the southern minute pirate bug; and a method for raising the predacious natural enemy minute pirate bug in different states indoor is provided. According to the raising method, a suitable oviposition environment for the minute pirate bug is provided and the male and female pairing number can be increased; the cannibalism among the nymph and non-natural death are effectively reduced; the nymph survival rate and the imago obtaining rate are raised; and the tedious procedure of individual test tube raising, replacing and cleaning is simplified. According to the invention, the survival rate in each state is high; the procedure is simplified; the demand for raising the southern minute pirate bug indoor in great deal is satisfied; the enough insect source for deep indoor research is provided; at the same time, the key technology support for predacious stink bug propagation and raising and application in agricultural biological control are provided.

The invention discloses an electric power steering system of a new energy vehicle and a control method of an electric control unit thereof. The electric control unit comprises an input circuit which is used for connecting with a sensor part, an MCU and an output circuit which is used for connecting with an actuator part, wherein both ends of the MCU are connected with the input circuit and the output circuit; the control method adopts an improved PI algorithm; integral separation and dead zone processing are carried out, and the smooth and steady follow of power torque under the condition of low cost of hardware is realized by the current closed-loop control of the variable parameter PID based on vehicle speed grouping; the duty ratio nonlinear compensation technique is adopted in the mode of limited bipolar pulse width modulation; the duty ratio is corrected by the current in the limited bipolar mode. When the current is across a dead zone, namely when the target current is changed from positive to negative or from negative to positive, and when the power is from zero to existence, the duty ratio is directly arranged near the target current value to be accurately adjusted by the current closed-loop feedback, and the current of the motor can reach the target value.

The present invention relates to a press-type liquid pump. The liquid pump comprises a fixed unit fixed relative to a container and a movable unit capable of performing a reciprocating motion relative to the fixed unit, and a liquid product is pumped to the exterior of the container. The reciprocating motion is achieved by a pressing force applied by a user to the movable unit to move the movable unit relative to the fixed unit in combination with an elastic restoring means for restoring the movable unit relative to the fixed unit after the pressing force is removed. The elastic restoring means is a plastic elastic compressing means located below a toothed sleeve and installed between the fixed unit and the movable unit, which comprises at least one elastic strip generally formed in an arc shape.

The present invention relates to a producing technique of degradable medical device. The polylactic acid is taken as raw material and is processed with a plastic film blowing machine and a plastic injection machine for producing various medical devices. The medical device can be easily and totally degraded in natural environment and therefore has the advantages of no pollution, energy conservation, and actual green environment protection.

The invention provides an intelligent warehouse goods management method based on a RFID (Radio Frequency Identification) technology. The method is characterized by comprising the following steps of: firstly, respectively implanting a RFID tag for each goods, registering different ID for each RFID tag, and allocating storage space for each ID in a database server; then, reading the RFID tag on each goods through a mobile RFID reader while registering the goods for storage, storing the goods, registering the goods for delivery and packing the goods; obtaining the ID of the RFID tag, inputting related information of the goods; and transmitting the data to the database server through a management system for storage. The method has the advantages of: (1) quick scanning; (2) excellent penetrability and barrier-free reading; (3) strong contamination resistance and durability; (4) large data memory capacity; (5) miniaturized volume and diversified shape; (6) excellent reusable property; (7) high security.

The invention relates to nano polishing solution for chemically mechanical polishing of vanadium oxide, which consists of a nano-abrasive, a pH regulator, a surfactant, a defoaming agent, a bactericide, a cleaning aid and a solvent, wherein the nano-abrasive is zirconium oxide, titanium oxide, plutonium oxide or silica; the pH regulator comprises inorganic base of KOH and organic base of tetramethylammonium, tetraethyl ammonium hydroxide or hydroxy amine; the surfactant is silicane polyethylene glycol ether, polyethylene glycol ether or 2-(2-dodecyloxyethoxy)ethanol; the defoaming agent is poly(dimethylsilane); the bactericide is isomerous thiazolidinone; the cleaning aid is isopropanol; and the solvent is deionized water. The invention has the advantages that: the polishing rate is stably controllable, the damage is low, the cleaning is simple, equipment is not corroded, the environment is not polluted, and the storage time is long; and a vanadium oxide film material is subjected to the chemically mechanical polishing by the nano polishing solution for preparing a resistive random access memory, and the method is simple and practicable, and is completely compatible with an integrated circuit process.

The invention discloses a cobalt sulfide / carbon fiber compound and preparation method and application thereof. The preparation method comprises the steps of A, preparing a polyacrylonitrile / cobalt nitrate composite film by an electrospinning method; B, immersing the polyacrylonitrile / cobalt nitrate composite film in a solution containing 2-methylimidazole to obtain a polyacrylonitrile / cobalt nitrate@metal organic framework; C, calcining the polyacrylonitrile / cobalt nitrate@metal organic framework under an atmosphere of a mixed gas to obtain a cobalt oxide / carbon fiber compound; and D, allowingthe cobalt oxide / carbon fiber compound to react with sublimed sulfur under an atmosphere of an inert gas to obtain the cobalt sulfide / carbon fiber compound. The sulfide / carbon fiber compound can be directly used as a negative electrode of a lithium ion battery, a current collector and a binding agent are not needed, thus, the preparation process of the battery is simplified, no pollution to an environment is generated, and favorable electrochemical performance is shown when the cobalt sulfide / carbon fiber compound is directly used as the negative electrode of the lithium ion battery.

The invention relates to a new method for preparing LixFeyPzO4 (particularly LiFePO4, LiFe2 / 3PO4 and Li4 / 7Fe4 / 7P8 / 7O4) by using ferro phosphorus, which comprises the following steps of: supplying an oxygen source for oxidizing P in the ferro phosphorus by only utilizing the oxygen in raw materials, proportioning in the mol ratio of the total phosphorus element to the total oxygen element of 1.0:(1.5-9.0), mixing the raw materials and then carrying out one-step reaction in a closed system at the temperature of 500-900 DEG C to obtain a product. The oxidation-reduction reacted material balance of the raw materials per se is realized in the closed system, without external oxygen sources, thereby solving a series of technical difficult problems caused by difficult oxygen quantity accurate control and oxygen introduction and eliminating the pollution of a large amount of waste gas during roasting by adopting an inert atmosphere or a carbide split product reducing atmosphere; the reaction is finished in the closed system, and the complete reaction is promoted by utilizing the pressure of the reaction per se, thereby reducing the volatilization of substances, such as lithium and the like in the raw materials, at high temperature and causing the product to be looser; and the method has no pollutant discharge in the preparation process, cleanness, environmental protection, short reaction flow, simple process, easy reaction operation, low requirement for equipment, low cost, less investment and good benefit and is easy to realize industrialization and suitable for producing high-performance LixFeyPzO4 by using the ferro phosphorus with low cost.

The invention relates to a bioactivity plant synergistic nutrient preservation concentrated solution. The bioactivity plant synergistic nutrient preservation concentrated solution comprises bioactive matters, plant organism nutrients, mineral matters needed by a plant, microelement complex liquid, and the balance of stable type sterilized water agent. The nutrient preservation concentrated solution which is applied to different crops in different modes is used to reinforce the resistance of the plant and fruits thereof to diseases and insect pests, bacteria and corrosion, drought and waterlogging, coldness and hotness, and wound and fatigue, and provide double safeguards for plant growth and development and nutrition conveyance. The nutrient preservation concentrated solution is an innocuous, degradable, easily absorbed, residue-free, pollution-free, low carbon type biologic green high-tech product capable of degrading pesticide residues, improving fertilizer efficiency and speeding up the available nutrient absorption of the plant.

The invention discloses a metallographic corrosive agent of high nitrogen stainless steel and a metallographic structure display method. The metallographic corrosive agent comprises 20 to 35g of ferric trichloride, 20 to 40ml of hydrochloric acid, 60 to 70ml of water and 20 to 40ml of glycerol. The metallographic corrosive agent effectively solves the problem that the existing corrosive agent easily over-corrodes a local part of a sample and causes structure corrosion nonuniformity so that the structureboundary is not clear and the metallographic structure display effect is poor. High nitrogen stainless steel corroded by the metallographic corrosive agent has a uniform corrosive surface, good corrosive effects, a clear metallographic structure, a tidy crystal boundary, can be easily washed, has no surface residues and pollutants, can be used in a metallographic sample preparation room without a fuming cupboard and does not damage the human body. The metallographic corrosive agent can be easily prepared, has no toxicity, damage and pungent smell, can be directly used in a metallographic sample preparation room without a fuming cupboard, can be washed easily, does not produce residues, does not produce pollution, has good corrosive effects and can produce a clear metallographic structure.

The invention relates to the field of pesticides and in particular relates to a biological preparation for preventing and treating astragalus membranaceus powdery mildew and a preparation method of the biological preparation. The biological preparation for preventing and treating astragalus membranaceus powdery mildew is characterized by providing components A, B and C which are prepared from hot pepper, garlic, pepper, ailanthus altissima swingle, gelsmium elegans, purslane, tobacco, golden cypress, celastrus angulatus, cacumen biotae, melia toosendan and birthwort, sequentially spraying the components A, B and C on the astragalus membranaceus when the powdery mildew occurs in the astragalus membranaceus growth period to remove the astragalus membranaceus powdery mildew germs. The biological preparation for preventing and treating astragalus membranaceus powdery mildew has the advantages that the biological preparation takes Chinese herbal medicines as the raw materials, has the inhibiting and killing functions for fungi through manners of contact poisoning, stomach poisoning and inward absorbing, is free of harm to people and livestock and pollution to the environment, simple in formula, convenient to use and capable of effectively preventing and treating a variety of diseases and insect pests.

The present invention relates to a method for preparing a novel S-(-)-amlodipine, and especially to a novel method for preparing S-(-)-amlodipine through the resolution of racemic amlodipine. The N,N-dimethylformamide (DMF) is used as a dissolvent. The L-(+)-tartaric acid is used as a resolving agent. Not only can the excellent resolving effect be obtained, but also the cost is low and safety is excellent.

The invention discloses a novel closed type nucleic acid visual detecting method for coupling a nucleic acid amplification reaction, a nucleic acid intrusive reaction and a nano-particle chromogenic reaction. The detection method comprises the following steps: 1) target nucleic acid amplification and signal conversion phase: further amplifying the target nucleotide sequence, and converting the detection of the target nucleic acid to the detection of a hairpin probe fragment; 2) nanoprobe hybridization phase: after the amplification reaction, under the corresponding conditions, generating a gathering or dispersing phenomenon by the special nanoprobe, and utilizing the phenomenon to realize distinguishing detection to the target nucleic acid. With adoption of the detection method disclosed by the invention, the nucleic acid target sequence can be detected; furthermore, the nucleic acid intrusive reaction is high in specificity, and the nucleic acid sequence with single different basic groups near the intrusive loci can be distinguished and detected, so that the method not only can be used for detecting a template, but also can be used for single basic group distinguished SNP genotyping and gene mutation.

The invention provides an intelligent warehouse cargo management method adopting an RFID technology. The method is characterized in that steps are: firstly, implanting an RFID label for each cargo respectively, registering a different ID for each RFID label and distributing a storage space for each ID in a database server; then both after the cargos undergo warehousing registration and warehousing, and when the cargos are undergoing ex-warehouse registration and cargo packing, adopting a mobile RFID reader-writer to read the RFID label on each cargo and obtaining the IDs of the RFIDs and inputting related information of the cargos and sending the data to the database server for storage through a management system. The advantages of the intelligent warehouse cargo management method adopting the RFID technology are: (1): rapid scanning; (2) penetrability and no-screen reading; (3) anti-pollution capability and durability; (4) large memory capacity of the data; (5) volume miniaturization and shape diversification; (6) reusability; (7) security.

The invention belongs to the technical field of environmental protection, and particularly relates to a preparation method of an algae biofilm and application thereof in sewage treatment. The preparation method specifically comprises the steps of carrier pretreating, algae culturing, algae domesticating and algae biofilm preparing. The preparation method of the algae biofilm has the advantages that the preparation cost is low, the raw materials are easy to obtain, and the algae biomass is easy to recycle; the prepared algae biofilm can achieve the efficient nitrogen and phosphorus removal effect in sewage treatment, achieves the purpose of general sewage treatment and not only can overcome the defects that in a suspended algae system, the algae density is low, the hydraulic retention time is long, algae and water are difficult to separate, too more suspended solids (SS) exist, the resource recycling rate is low but also has the advantages of reducing immobilization reagent cost, weakening the influences of immobilization reagents on the algae activity, reusing immobilization carriers and the like.

The invention discloses a vehicle and a drive axle module used for the vehicle. The drive axle module comprises a drive axle assembly, wherein the drive axle assembly comprises two vehicle axle assemblies, each vehicle axle assembly comprises an axle housing assembly, and each axle housing assembly comprises an axle housing module and two semi-axles; at least one of the two vehicle axle assemblies is an electric drive axle assembly; the electric drive axle assembly also comprises an electrodynamic assembly and a suspension device; the electrodynamic assembly comprises a power motor, a transmission and a differential mechanism, the transmission comprises a transmission shell body, the power motor is fixed on the transmission shell body, the differential mechanism is supported on the transmission shell body, the transmission shell body is fixed on the axle housing module, the transmission comprises multiple transmission shafts, the multiple transmission shafts are disposed successively from top to bottom, and the suspension device is connected between the electrodynamic assembly and a frame of the vehicle; and the drive axle module also comprises a suspension system, wherein each vehicle axle assembly is connected to the frame of the vehicle by the suspension system. The drive axle module used for the vehicle disclosed by the invention has the advantages of a compact structure, green and environment-friendly effects and steady transmission.

The invention discloses a coating composition for a transferable laser anti-counterfeiting plate and a method for preparing the transferable laser anti-counterfeiting plate. The coating composition comprises the following components in parts by weight: 2-15 parts of polyacrylate resin, 5-10 parts of high-Tg-monomer-containing modified polyacrylate resin, 2-5 parts of hydroxyl-containing polyacrylate resin, 1-3 parts of low polyisocyanate resin, 0.1-0.5 part of aid and 72-82 parts of solvent. The method for preparing the transferable laser anti-counterfeiting plate comprises the following steps: coating the coating composition on a polyethylene glycol terephthalate (PET)-based film, performing die pressing, plating aluminum, coating and transferring a heat-seal adhesive, and preparing a transferable film; stripping the PET-based film on the transferable film, compounding the coating composition to a coil base material, and preparing the transferable laser anti-counterfeiting plate. The coating composition can meet high solvent-resistant and temperature-resistant temperatures in the production process of laser anti-counterfeiting plates. Moreover, the PET-based film used by transferable color steel can be repeatedly used, environment friendliness is promoted, and the production cost is reduced.

The invention discloses a method for culturing chlorella pyrenoidosa by taking sheep manure leach liquor as a main nitrogen source, and belongs to the field of aquiculture. The chlorella pyrenoidosa is rich in nutrition, widely used for manufacturing healthcare products, cosmetics, medicines, sea fishes and shrimp feeds; a f / 2 culture solution and an open cement pit are conventionally adopted to culture, so that the growth is slow, the pollution is easily produced, the cost is high and the benefits are low; at present, a horizontal type white plastic water storage tank is adopted for aerated feeding culture, and the sheep manure leach liquor is taken as the main nitrogen source and added with an appropriate amount of nutritional ingredients such as ammonium nitrate, sodium dihydrogen phosphate, soil extract, DL malic acid, D-sodium erythorbate, potassium silicate, indoleacetic acid, alpha-naphthylacetic acid, medical stone powder, a titanium solution, wheat gluten and hydroxypropyl methyl cellulose, so that not only can the waste be utilized, but also microalgae with a high healthcare value can be obtained; the organic fertilizer and the inorganic fertilizer are mixed for use, so that the nutrition is relatively comprehensive, the operation is convenient, the automatic and large-scale production can be realized, the cost is low, the benefits are high, and the microalgae yield is increased by 240%.

The invention discloses an electrostatic power machine experimental instrument and belongs to the field of physics teaching experiment instruments of universities and middle schools. The electrostatic power machine experimental instrument is mainly composed of an electrode plate, a swing plate, a high-voltage electrostatic power supply, a rotation wheel and a motion conversion rod. The electrostatic power machine experimental instrument is substantially different from prior arts and has the following advantages: when the distances between positive and negative electrode plates and voltages are fixed, the larger the swing plate is, the more the swing plate carries charges and the larger the applied electrostatic acting forces are, power is strong and is close to constant-force output in the swing process of the swing plate, since the swing plate is symmetrically distributed at the two sides of a plastic rotation disc rotation shaft, equidirectional driving moment can be generated, besides, the apparatus can also be enabled to placed at any inclination angles without affecting work, through the swing rod, the driving moment generated on the rotation wheel can be increased, and the rotation wheel is more easily driven to rotate when the motion conversion rod is used for outputting power. The power machine provided by the invention is low in manufacturing cost and low in operation cost, is free from pollution, is quite simple to manufacture and obvious in effect and increases education functions in classroom teaching, thereby being of great significance and having great development prospect.

The invention discloses a washable super-hydrophobic cotton fabric as well as a preparation method and applications thereof, which belong to the technical field of functional materials. The washable super-hydrophobic cotton fabric is obtained through the steps of washing a cotton fabric, and then sequentially soaking the cotton fabric in an acetone solution of epoxy resin, an aqueous solution of polyethyleneimine, an epoxidized silicon dioxide aqueous solution, and an n-hexane solution of stearic acid for treatment. The preparation method comprises the following detailed steps: 1. washing the cotton fabric; 2. soaking the cotton fabric in an epoxy resin solution; 3. soaking the cotton fabric in a polyethyleneimine solution; 4. soaking the cotton fabric in a modified sub-micro silicon dioxide aqueous solution in which 3-glycidyl ether oxyl propyl trimethoxysilane is dispersed; 5. repeating the steps 3 and 4; 6. soaking the cotton fabric in a stearic acid hydrophobically-modified solution and drying the cotton fabric. The washable super-hydrophobic cotton fabric is used for oil-water separation. The preparation method is simple in technology, low in cost, short in period and low in energy consumption and does not need special complicated equipment; the prepared super-hydrophobic cotton fabric is washable and capable of rapidly separating an oil-water mixture and can be applied to the fields of industrial oil-water separation and the like.

The invention relates to a preparation method of irinotecan hydrochloride. The preparation method comprises the following steps: 1, reacting 4-piperidylpiperidine with dimethyl carbonate in a dipolar aprotic solvent to generate 4-piperidylpiperidine dimethyl carbonate; 2, reacting 4-piperidylpiperidine dimethyl carbonate with 7-ethyl-10-hydroxycamptothecin in a nonpolar solvent to generate irinotecan monomers; and 3, adding water to dissolve the irinotecan monomers, adding a hydrochloric acid solution to adjust the pH value of the obtained solution to 3-4, adding acetone, crystallizing, filtering, and carrying out vacuum drying to obtain finished irinotecan hydrochloride. The preparation method which introduces carbonyl groups to the active substance dimethyl carbonate during preparation of irinotecan hydrochloride has the characteristics of safe use, convenience, small pollution, easy transportation and the like in production; the preparation method which allows use of phosgene substances to be completely avoided and pollution to the environment to be correspondingly migrated is green; and an acid binding agent is not needed by the method, and methanol which is the only byproduct is a volatile substance with a low boiling point, so post-processing is simple.

The invention provides an environment-friendly non-chlorine-salt snow melting and deicing agent and a preparation method thereof, and belongs to the field of snow melting and deicing. The environment-friendly non-chlorine-salt snow melting and deicing agent is characterized by comprising the following raw materials in percentage by weight: 60-90 percent of main solvent, 2-20 percent of wetting cosolvent and 2-20 percent of corrosion inhibitor, wherein the main solvent is prepared from 60-90 percent by weight of formate and 10-40 percent by weight of sodium metasilicate; the wetting cosolvent is prepared from 40 percent by weight of sodium borate or calcium nitrate and 60 percent by weight of urea or ammonium carbonate; the corrosion inhibitor is prepared from 60 percent by weight of sodium gluconate and 40 percent by weight of zinc sulfate. According to the environment-friendly non-chlorine-salt snow melting and deicing agent, the common problems of high corrosivity, serious impact on soil structures and the like of common inorganic chlorine salt snow melting agents can be effectively solved; after being used, the environment-friendly non-chlorine-salt snow melting and deicing agent can be naturally decomposed under the natural environment, and the cost of the non-chlorine-salt snow melting and deicing agent is lower than that of other organic salt (like acetates including potassium acetate, calcium magnesium acetate and the like) snow melting and deicing agents; therefore, the environment-friendly non-chlorine-salt snow melting and deicing agent is suitable for being used in places like domestic and overseas roads, airport pavements and streets, and has wide popularization and application prospects.

The invention discloses a mixer vehicle, comprising: a frame; a first axle assembly; a second axle assembly spaced apart from the first axle assembly in front-rear direction and comprising two axle assemblies spaced part in the front-rear direction, wherein each axle assembly comprises an axle housing assembly that comprises an axle housing component and two axle shafts positioned in the axle housing component, at least one of the two axle assemblies is an electric drive axle assembly which also comprises an electric power assembly, the electric power assembly comprises a power motor, a transmission and a differential, the differential has a transmission housing, the power motor is fixed on the transmission housing, the differential is supported on the transmission housing, the differential is positioned in the axle housing component, and the transmission housing is fixed on the axle housing component; a suspension system, wherein all the axle assemblies are connected with a frame through the suspension system. The mixer vehicle according to the invention is compact in structure, high in integrity and green.