34results about How to "Full solubility" patented technology

The invention discloses an environment-friendly aluminum cleaning agent and a preparation method thereof. The cleaning agent is composed of the following components in percentage by weight: 20% to 25% of inorganic acid, 10% to 20% of organic acid, 10% to 18% of surfactant, 8% to 15% of osmotic agent, 6% to 18% of emulsifier, 2% to 8% of antifoaming agent, 5% to 8% of complexing agent, and 25% to 30% of water. In the provided cleaning agent, the using amount of hydrochloric acid, sulfuric acid, and nitric acid is reduced, the aluminum parts are washed by medium-strong acids and organic acids, and the cleaning agent has a very good oil stain and rust removing ability. The cleaning agent is acidic, the pH value of the cleaning agent is 2.1 to 5.6, and the cleaning agent can well remove the oxide scale on the aluminum surface. Because the acidity of the organic acids is weak, the over-corrosion on work tools and acid volatilization, which can harm the workers' health, are effectively avoided, and the cleaning effect is not influenced at the same time. Moreover the adopted organic acids are easy to decompose, and thus the cleaning agent is environment-friendly.

The invention discloses a manufacturing process for a high-strength corrosion-resistant aluminum alloy forged piece. The process comprises the following steps of material preparation, heating, multi-axial forging, mechanical machining, heating, trestle bearizing, heating, ring rolling, mechanical machining, annealing, solid-solution water-quenching, cold pressing deformation, aging and the like. The aging treatment method comprises the steps of first-grade aging, specifically, a ring forged piece subjected to cold pressing is put into a furnace at the room temperature and heated to 90-110 DEGC, heat preservation is performed for 1-3 hours, and air cooling is performed; second-grade aging, specifically, the ring forged piece is put into the furnace when the temperature is reached, heat preservation is performed for 4-8 hours at the temperature of 150-160 DEG C, and air cooling is performed after aging is ended.

The invention relates to a CuO-NiO/rGO composite material with efficient electro-catalysis oxygen reduction performance, and belonging to the technical field of electro-catalysis materials. In the CuO-NiO/rGO composite material provided by the invention, CuO-NiO nanoparticles are attached to a reduction-oxidized graphene sheet layer, a mass ratio of the CuO-NiO nanoparticles to the rGO is 100:3-5, the sizes of the CuO-NiO nanoparticles are 6-10nm, and the reduction-oxidized graphene sheet layer is a single sheet layer; and the electro-catalysis oxygen reduction performance is provided. Compared with existing oxygen reduction reaction catalysts, the CuO-NiO/rGO composite material provided by the invention is significantly reduced in cost, and is the oxygen reduction reaction catalyst with low price and excellent electro-catalysis oxygen reduction performance. The CuO-NiO/rGO composite material provided by the invention adopts copper salts, nickel salts, hydroxides and oxidized graphene as materials, deionized water and absolute ethyl alcohol as solvents, and glycol as a dispersing agent and a reducing agent, and is synthesized by using a one-pot hydrothermal method. The CuO-NiO/rGO composite material provided by the invention is low in material price, prone to get materials, simple and easy in preparation operation, simple in aftertreatment process, prone to control reaction parameters, short in flow and low in energy consumption.

The invention relates to a fiber screen bag and a method for rapidly determining coarse fibers. After special fibers are used for making a screen with pore diameter being 25.0mum, a sample is put into a screen bag with certain size and is respectively boiled in acid and alkaline for 40min, then the sample is washed clean, dried and weighed and the content of the coarse fibers can be calculated by subtracting the weight of ash. The fiber screen bag and the method can be used by scientific research institutions, analysis and detection institutions, feed plants and the like to rapidly determine the content of the coarse fibers of feed, grains, oil and food on a large scale, and can also be used for rapidly determining neutral detergent fibers (NDF), acid detergent fibers (ADF), celluloses, hemicelluloses, dietary insoluble fibers, lignin and the like on a large scale. Compared with the traditional national standard method, the method has the advantages that the method is suitable for large-scale rapid determination, the efficiency is high, the time is short, the precision and the accuracy are high, the cost is low, and equipment such as any fiber determination instrument, filter and suction filtration devices and the like are not required. The fiber screen bag has the advantages that the bag is not floated, the weight is not lost, the moisture is not absorbed, the bag is not broken, the ash does not exist and the like when solvents such as acid, alkaline, acetone and the like are used for treatment.

The invention relates to a CuO/rGO composite material having efficient electrocatalysis oxygen reducing performance and belongs to the technical field of electrocatalysis materials. Nano CuO particles are attached onto a reduced-oxidized graphene sheet layer, a mass ratio of nano CuO and rGO is 100:3-5, size of the nano CuO particles is 6-10nm, the reduced-oxidized graphene sheet layer is a single sheet layer, and the CuO/rGO composite material has electrocatalysis oxygen reducing performance. Compared with existing oxygen reducing reaction catalysts, the CuO/rGO composite material has the advantage that cost is lowered obviously; the CuO/rGO composite material is an oxygen reducing reaction catalyst low in cost and excellent in electrocatalysis oxygen reducing performance. The CuO/rGO composite material is synthesized by taking copper salt, hydroxide and graphene oxide as raw materials, deionized water and anhydrous alcohol as solvents and ethylene glycol as a dispersant and reductant and adopting a hydrothermal one-pot process. The raw materials are low in cost and easy to obtain, preparation operation is simple and easy to implement, aftertreatment process is simple, reaction parameters are easy to control, process is short, and energy consumption is low.

Disclosed is a coating agent for electronic components, which contains (1) a polymer having a repeating unit (A) derived from a fluorine-containing acrylate monomer and a repeating unit (B) derived from an amino group-containing monomer, and (2) an aqueous liquid medium. A coating can be easily formed on the surface of an electronic component by using the coating agent. The coating agent also enables formation of a coating film which excels not only in moisture prevention but also in chemical resistance, electrical insulation, weather resistance and durability.

The invention discloses an aluminum alloy sheet forming and heat treatment technology. The technology comprises the following steps of material preparing, homogenization heat treatment, multi-axis forging, machining, surface milling, heating, deforming at different temperature intervals, heat treatment, straightening, saw cutting and the like. Deforming at different temperature intervals comprisesthe steps of the first interval process, specifically, high temperature rolling is conducted on a heated forging stock; the second interval process, specifically, the forging stock is transferred toa hydraulic machine for medium-temperature hot compression deformation; the third interval process, specifically, medium-temperature rolling is conducted after compression deformation is completed; and the fourth interval process, specifically, cold finish rolling deformation is conducted when a sheet is cooled to room temperature, and then a rolled sheet is obtained.

The present invention relates to a desulfurization synergist having a scale inhibition performance and for a limestone-gypsum wet flue gas desulfurization system (FDG), and a preparation method thereof. The desulfurization synergist is characterized in that the desulfurization synergist is prepared by compounding 70-90% by mass of a hydroxyl carboxylate and an organic carboxylate, 9-28% by mass of a scale inhibitor, and 1-2% by mass of a fluorescent tracer, wherein a mass ratio of the hydroxyl carboxylate to the organic carboxylate is an arbitrary ratio. With the present invention, desulfurization efficiency can be significantly improved.

The invention relates to a three-cavity dosing device for sewage treatment. The device comprises a chemical dissolving case and a control case, wherein the inside of the chemical dissolving case is divided into a dissolving cavity, a curing cavity and a storing cavity, a feed hopper is arranged on the dissolving cavity, a water supply system and a dry powder dosing system are arranged above the feed hopper, and a motor-controlled stirrer is arranged in the dissolving cavity; a stirrer and a curing cavity liquid level meter are arranged in the storage cavity; a metering pump is arranged at thebottom of the storage cavity, and is communicated with a chemical discharge tube which passes through a pipeline and penetrates out of the storage cavity; an air release valve is arranged at the bottom of the storage cavity; the dissolving cavity and the curing cavity are communicated at the bottom of the chemical dissolving case, while the curing cavity and the storage cavity are communicated onthe top of the chemical dissolving case; a horizontal pipeline communicated with the storage cavity from the dissolving cavity is arranged at the bottom of the chemical dissolving case, and an electromagnetic valve at one end, positioned in the dissolving cavity, of the horizontal pipeline; the middle part of the horizontal pipeline is connected with a vertical pipeline in the curing cavity through a tee-joint; and an electromagnetic valve is arranged on the vertical pipeline.

The invention discloses garlic leisure food as well as a preparation method thereof, and belongs to the field of food processing. The preparation method of the garlic leisure food comprises the steps of washing a garlic clove with clear water, removing the water, steaming for 20-30min with a steamer at ordinary pressure, after the garlic clove is steamed, taking the garlic clove out for natural cooling, uniformly mixing the garlic clove and sauce at a weight ratio of 1:1, placing in a ceramic cylinder, sealing in a 0-5 DEG C dark environment for dipping for 30-35 days, pouring the cylinder and uniformly mixing every other 10 days, finally taking out, removing the sauce, washing off the sauce remained on the surface of the garlic clove with 60-degree high-quality brewing liquor, removing remaining liquor, spreading on a foil mat, putting in a cool and ventilated place for natural airing for 3-4 days to allow a water content to be 50-55%, obtaining a semifinished product, drying the semifinished product to allow the water content to be 5-8%, performing vacuum packaging or nitrogen-filled packaging with a polyethene packaging bag which is poor in air permeability and high in mechanical strength, and obtaining a finished product.

The invention relates to the technical field of effervescent tablet preparation, and discloses tea polyphenol effervescent tablets. The tea polyphenol effervescent tablets are composed of acid granules, alkaline granules and a lubricant, wherein the acid granules comprise, by weight, 8-12 parts of tea polyphenols, 1-3 parts of citric acid and 1-3 parts of soluble starch, and further comprises, by volume, 6-9 parts of ethyl alcohol serving as a binding agent, the alkaline granules comprise, by weight, 8-12 parts of tea polyphenols, 1-3 parts of sodium bicarbonate and 1-3 parts of soluble starch, and further comprises, by volume, 5-8 parts of PVP absolute ethyl alcohol solution serving as a binding agent, and the lubricant comprises, by weight, 0.50-0.70 part of PEG6000. The invention further comprises a preparing method of the tea polyphenol effervescent tablets. The prepared tea polyphenol effervescent tablets can be quickly disintegrated in water, effective components are released, which is beneficial to sufficient dissolution and absorption of tea polyphenols, and the healthcare effect is good. The prepared tea polyphenol effervescent tablets are small in size, light in weight and convenient to carry and use, and thus the using performance of the tea polyphenol effervescent tablets is sharply improved.

A combined process coupling aerobic biochemical treatment, ozone catalytic oxidation and biological denitrogenation for acrylonitrile wastewater is disclosed. The combined process comprises an aerobic biochemical process, an ozone catalytic oxidation process and a biological denitrogenation process. Discharged water subjected to aerobic biochemical process treatment in an aerobic biochemical unit is led into an ozone catalytic oxidation unit. Ozone catalytic oxidation process treatment is performed in the ozone catalytic oxidation unit, and discharged water after the ozone catalytic oxidation process treatment is led into a biological denitrogenation system and subjected to biological denitrogenation process treatment.

The invention discloses a device and method for treating high-concentration dye wastewater. The device comprises a pH adjusting tank; a coagulation sedimentation, wherein a water inlet end of the coagulation sedimentation tank is connected with a water outlet end of the pH adjusting tank; a main reaction tank, wherein a water inlet end of the main reaction tank is connected with a water outlet endof the coagulation sedimentation tank; an oil-free air compressor; an adsorption dryer, wherein an air inlet end of the adsorption dryer is connected with an air outlet end of the oil-free air compressor; an ozone generator, wherein an air inlet end of the ozone generator is connected with an air outlet end of the adsorption dryer, and an air outlet end of the ozone generator is connected with anaeration pipe at the bottom of the main reaction tank through a pipeline. The device adopts a microelectrolysis-ozone-ultrasonic wave system, and the utilization rate of ozone can reach more than 95%through the synergistic effect of an iron-carbon filler and ultrasonic wave and the cyclic utilization of ozone tail gas. The device has the advantages of compact structure, high space utilization rate, good economy, high treatment efficiency and the like, and can be used for treating high-concentration dye wastewater.

The invention provides a preparation method of blueberry dew wine. The preparation method comprises the following steps: pre-treating raw materials; adjusting components; inoculating yeast; regulatingthe sugar; carrying out low-temperature fermentation; immersing; separating pomace; naturally clarifying; ageing; purifying; blending, filtering with diatomite and ageing to obtain a blueberry dew wine qualified product. A technological flow provided by the invention has a reasonable design and an advanced technology; in a whole preparation process, the temperature is strictly controlled and thelow-temperature fermentation is ensued; the loss of procyanidin content, caused by heating in a blueberry preparation process, is reduced, so that the content of procyanidin of the blueberry dew wineis greatly improved and the taste is more pure.

The invention discloses a water resource purification ecological floating bed. The water resource purification ecological floating bed comprises a floating bed body, an impeller, soilless plant cultivation devices, submerged plant tanks and side plates, wherein the impeller is mounted at the lower end of the floating bed body, the soilless plant cultivation devices are mounted on the two sides ofthe impeller, the submerged plant tanks are mounted at the lower ends of the soilless plant cultivation devices, and the side plates are mounted on the two sides of each submerged plant tank. The water resource purification ecological floating bed is scientific and reasonable in structure, safe and convenient to use, is provided with the impeller, mixes gas and water mixtures, promotes sufficientdissolving and absorption of oxygen in air, and improves the oxygen transfer efficiency and oxygenation capability; the soilless plant cultivation devices and the submerged plant tanks are arranged, and plants are planted evenly, so that pollutants such as nitrogen and phosphorous in the water body are removed conveniently, and eutrophication of the water body is controlled; the side plates are arranged, through buffer effects of flow buffer chambers in the side plates, the phenomenon is avoided that water flow outside tank bodies directly impact soil in the tank bodies, the flow velocity of the water flow is reduced conveniently, and soil loss in the tanks is reduced.

The invention discloses an external plant extractive composition with an anti-sensitive effect and a preparation method thereof. According to the formula, the composition is prepared from 42-61% of water, 30-40% of butanediol, 3-5% of astragalus root extractives, 2-4% of radix sophorae extractives, 2-4% of glycyrrhiza inflata root extractives, 1-3% of lactic acid bacteria/mung bean seed fermentation product extractives and 1-2% of serine. The preparation method of the composition comprises the steps of 1 selecting materials, 2 cleaning and drying instruments, 3 performing one-time stirring, 4performing secondary stirring, 5 performing tertiary stirring and standing, 6 performing filtering and cleaning and 7 performing disinfecting and packaging. The composition has the anti-sensitive effect, meanwhile generates no stimulus response and is high in safety; the raw materials can be sufficiently dissolved and make sufficient contact, and the phenomenon that blocking is performed due to the fact that excessive raw materials are added is avoided.

The invention discloses a malt preparation process capable of stably controlling chroma of Canadian beer malt. The Canadian beer malt is subjected to malt soaking, germination and a drying process to be made into beer malt with stable chroma, wherein the drying process further comprises the procedures of whithering, kilning and cold air blowing. The drying process is optimized to guarantee sufficient dissolution and the homogeneity of malt and to improve the chroma stability of the out-furnace malt; a germination time prolonging mode is not adopted to improve the dissolution, so that the production cost is lowered while the product quality is improved; and when applied to beer brewing, the Canadian beer malt with low malt chroma and stable chroma can greatly meet market demands.

The invention relates to a polymer agitating device. The invention is characterized in that the device comprises an agitating tank, a cylindrical bracket and a pedestal, wherein the agitating tank is vertically and fixedly arranged in the cylindrical bracket, and the bracket is fixedly arranged on the pedestal; the cross section of the agitating tank is 8-shaped, and has a feeding port at the upper part thereof and a discharging port on bottom part thereof; a pair of spindle agitators are axially arranged in the agitating tank and comprise two main shafts axially running through the agitating tank, wherein upper ends and lower ends of the two main shafts are fixed with the agitating tank through bearings respectively; the lower ends of the two main shafts are respectively arranged with gears which are connected to the output end of a motor through a gear transmission device; a plural groups of blades are radially arranged on parts with different height of the two main shafts, and the blades on the two main shafts are arranged staggerly on height. The polymer agitating device has a compact structure, reduces volume of equipment, saves space and can be widely applied to driving polymer in offshore oil exploitation.

The invention belongs to the technical field of milk food preparation, and particularly relates to an additive-free normal-temperature yoghourt and a preparation method thereof. Main raw materials ofthe normal-temperature yoghourt only comprise three main components of liquid milk, a sweetener and nostoc sphaeroides, and addition of additional stabilizers and acidity regulators is not needed. Theproduct provided by the invention can be stored at normal temperature for 5 months, and the yoghourt has thick, pure and delicious flavor and mellow and smooth taste. After the product is placed at normal temperature for 5 months, the product basically has no phenomena of water seepage, bad flavor, protein coagulation and precipitation phenomena, and has stable mouthfeel and longer shelf life. Finally, it proves that the product has a reasonable formula, good flavor and smooth mouthfeel. According to the preparation method disclosed by the invention, the nostoc sphaeroides powder is subjectedto hydration and independent fermentation treatment, so that polysaccharide substances of the nostoc sphaeroides powder are effectively dissolved out, and bad flavor brought by the nostoc sphaeroidespowder is also modified. According to the invention, viscosity and stability of the product are successfully improved in a green mode, and the normal-temperature yoghourt with clean ingredients is prepared.

The invention discloses a lactobacillus beverage containing euglena powder and chia seed powder and a preparation method thereof. The lactobacillus beverage is prepared from chia seed powder, a sweetening agent and fermented milk, the fermented milk is prepared from milk powder, euglena powder and fermentation strains, the proportion of all the raw materials is reasonably configured, no stabilizer needs to be added, and the system is stable and has a clean product label; meanwhile, through cooperation of all the raw materials, the taste and flavor of the lactic acid bacteria beverage are improved. Meanwhile, according to the preparation method, two-time material melting and material mixing are combined, and the euglena fishy smell can be effectively covered.

The invention belongs to the technical field of manufacturing of biomedical engineering equipment and related devices, and in particular relates to a preparation method of a micro-fluidic chip for sequencing. The preparation method comprises the following steps: 1. preparing a single-surface polished substrate; 2. carrying out water bath with N,N-dimethyl formamide and flushing with water, blowing the substrate and drying; 3. coating the polished surface of a chip with a photoresist, and exposing to form a reaction tank pattern on the surface; 4. by virtue of dry etching, forming a reaction tank; 5. carrying out water bath with N,N-dimethyl formamide, soaking in a sulfuric acid and hydrogen peroxide mixed solution and flushing with water; and 6. completing the preparation of the chip. According to the preparation method disclosed by the invention, interference of impurities or stains on a sequencing reaction can be avoided, and the sequencing accuracy and the sequencing efficiency can be guaranteed.

The invention discloses a multifunctional water cup for elementary school students. The water cup comprises a cup body, a cup cover and a stirring mechanism; the cup cover is in threaded connection with the cup body, a rubber pad capable of improving the leakproofness of the cup body and the cup cover is further arranged in the cup cover, and a stirring mechanism is arranged in the cup body and comprises a rotation shaft, stirring rods and inclined plates; the lower end of the rotation shaft penetrates through a partition plate, extends into a slide groove and is fixedly connected with a gear,the gear is meshed with a rack plate arranged at the side end of the gear, and one end of the rack plate is connected with the side wall of the slide groove through a spring; the other end of the rack plate penetrates through the slide groove and is rotatably connected with an arc handle through a rotation connector. The water cup is novel in design, the rack plate is pulled through the arc handle, the rack plate drives the rotation shaft to rotate through the gear, when the rotation shaft rotates, stirring is conducted through the stirring rods and the inclined plates, a solute can be sufficiently dissolved, and the water cup is convenient to use. The problem is effectively solved that an existing cup is monotonous in function, and when the students need to make coffee or milk powder, other auxiliary rods need to be adopted for stirring.

The invention discloses a pretreatment process of a high-comfort China-hemp fabric, and belongs to the technical field of fabric pretreatment. The pretreatment process of the high-comfort China-hemp fabric comprises the procedures of steam explosion scouring and bleaching pretreatment, bleaching, mercerizing and softening treatment, wherein the steam explosion scouring and bleaching pretreatment adopts a two-stage flash-explosion pretreatment technology; the bleaching process adopts sodium chlorite bleaching; the bleaching process has a remarkable capability of removing cellulose lignin impurities; the problem of incomplete impurity removal in the scouring process is solved; and the whiteness of the treated China-hemp fabric is high. The China-hemp fabric treated by the pretreatment process disclosed by the invention has soft, comfortable and smooth hand feeling and does not have scratchiness.

The invention discloses a biological kit with an automatic vibration function. The biological kit comprises a cover, wherein grooves are formed in the two ends of the top of the cover; handles are arranged in the grooves; a box matched with the cover is arranged at the lower part of the cover; an anti-slip pad is arranged at the bottom of the box; a fixed seat is arranged at the bottom in a cavityof the box; fixed blocks are arranged at corners of the two ends of the top of the fixed seat; a clamp strip is arranged on one side of each fixed block; a vibration strip is arranged at the top of each clamp strip; a vibration rack is transversely arranged between the tops of the vibration strips in a penetrating manner and is a U-shaped groove rack, a plurality of through holes are formed in aU-shaped groove of the vibration rack, reagent tubes are arranged in the through holes in a penetrating manner, a reagent tube cap is arranged at the top of each reagent tube, and fixed strips matchedwith the vibration strips are arranged at corners of the two sides of the vibration rack.

The invention provides a traditional Chinese medicine composition for reducing hypertension and a preparation method, and relates to the technical field of traditional Chinese medicines. The traditional Chinese medicine composition for reducing hypertension comprises the following raw materials in parts by weight: 20-30 parts of euphorbia humifusa, 10-20 parts of salvia miltiorrhiza, 5-14 parts of ligusticum chuanxiong hort, 6-18 parts of radix curcumae, 6-15 parts of dogwood, 9-18 parts of siegesbeckia orientalis, 10-20 parts of ruddle, 5-12 parts of malt, 5-12 parts of oriental wormwood, 3-8 parts of arisaema cum bile, 5-10 parts of semen raphani, 5-10 parts of bulbophyllum inconspicuum maxim, 3-9 parts of polygala tenuifolia, 3-9 parts of lily and 3-7 parts of liquorice. The medicine prepared by the invention has the effects of removing stasis and dredging collaterals, tonifying and astringing the kidney, soothing the liver and regulating qi, and clearing away the heart fire and soothing the nerves, so that the traditional Chinese medicine formula treats both symptoms and root causes, can quickly treat the symptoms, relieve the symptoms and slowly treat the root causes to balance yin and yang of the liver and the kidney so as to reduce side effects, and has a remarkable blood pressure reduction effect.

The invention discloses a preparation method of a laboratory reagent bottle label protective film, and relates to the technical field of label protective films. Putting the water-based flame-retardant treatment agent into deionized water, and heating in a water bath to fully dissolve the water-based flame-retardant treatment agent; triethanolamine, stearic acid and isothiazolinone are added, and water bath heating and stirring are continued; heating to melt the white wax, and pouring the white wax while hot; and adding boiling deionized water, heating and stirring until the substances are completely dissolved, taking down, standing, naturally cooling to room temperature, covering and storing in a glass container to obtain a prepared finished product. The water-based flame-retardant treating agent is used as a raw material of the label protective film, so that the prepared finished product has good fireproof performance; isothiazolinone is added, so that the prepared protective film has a mildew-proof effect; and stearic acid and triethanolamine are added, so that the raw materials are more fully dissolved and emulsified, and the finished product is more uniform. And the prepared finished product is uniform in film formation, fast in film formation and convenient to manufacture, meets the requirements of green chemistry, and has obvious economic benefits and social benefits.

The invention discloses a detergent release device and a washing machine. The detergent release device comprises a body, the body is hollow and forms a containing cavity, the containing cavity is internally provided with a detergent containing device, the detergent containing device is communicated with the containing cavity, and the surface of the body is provided with multiple liquid outlets by which the containing cavity is communicated with the outside. During washing clothes, the detergent release device performs turnover movements along with washing water flow, and the water flow enters the detergent containing device to dilute or dissolve a detergent and washes the interior of the detergent release device so as to cause the detergent to be completely released in the washing machine, thereby solving the problems that the release of the detergent with the hands of a user is inconvenient and the detergent cannot be completely diluted or dissolved in the washing machine.

The invention relates to a process agent adding device. The process agent adding device comprises a liquid level switch, an overlow empty pipe, a stirring machine, a solution box system, an agent feedpipe, a venturi pre-stirring bucket, a machine frame, a material cylinder and a quantitative agent adding machine, a vacuum charge machine, a control box, an agent discharge pipe, a pipeline pump, acuring process curved pipe A, a curing process curved pipe B, a curing process curved pipe C, and a static mixing pipe, wherein the upper ends of the curing process curved pipe A, the curing process curved pipe B and the curing process curved pipe C are connected with the agent feed pipe; the static mixing pipe is arranged in the curing process curved pipe or the agent feed pipe. The process agentadding device has the advantages that by additionally arranging the venturi pre-stirring bucket, the agent and water are fully and uniformly mixed before entering the solution box; by additionally arranging the curing process curved pipe A, the curing process curved pipe B and the curing process curved pipe C between the agent feed pipe and the venturi pre-stirring bucket, and using in an alternative or joint way, the stirring time and curing time of the agent are extended, the full dissolving and curing of the agent can be guaranteed, and the problems of incomplete curing, and waste of agentare solved.

A mixing device for a tub for supplying to a tub a mixed liquid which has mixed gas and water includes: a 1mixing tub which includes: a chamber with a port which connects to an inlet pipe of the mixed liquid at the top of the chamber, and a cylinder disposed within the chamber and having an upper end opening which connects to an outlet pipe of the mixed liquid and a lower end opening placed in the vicinity of a bottom of the chamber; and a 2mixing tub connecting to a flow inlet for supplying the mixed liquid to the inside of the tub and including a supply pipe with multiple holes or bores for the flowing out of the mixed liquid to the mixed liquid which has accumulated inside 2mixing tub.

The invention discloses a catalyst for preparing 1,2-dimethylimidazole and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing a chromium source, ammonia water, a structure-directing agent and deionized water under stirring at the room temperature so as to obtain a first solution; mixing a tin source with deionized water, and conducting uniform stirring at room temperature to obtain a second solution; dropwise adding the second solution into the first solution, and performing stirring at a temperature of 60-90 DEG C to form sol-gel; transferring the obtained sol-gel into a supercritical reaction kettle for a crystallization reaction; and filtering an obtained crystallization product, washing and drying the crystallization product, and conducting roasting at 450 DEG C for 1-3 hours to obtain the product. The catalyst is small in grain size, large in specific surface area, large in the number of exposed acid active sites, rich in acid amount, high in acid strength and beneficial for dehydration reactions of 2-methylimidazole and methanol, and the raw material conversion rate and the yield of the target product 1,2-dimethylimidazole are high.