52results about How to "Reduce granulation" patented technology

The invention discloses a preparation method of nylon fibers. The preparation method comprises the following steps: directly spinning after taking raw materials containing 1,5-pentamethylene diamine and adipic acid to react. The invention further provides the nylon fibers prepared by the method. The method adopts a manner of combining nylon polymerization and fusion direct spinning to prepare nylon 56 wires so that the production cost is reduced, the waste gas is reduced and the pollution to the environment is reduced. The high-performance nylon fibers prepared by the method can be further used for preparing textile materials including yarns, woven fabrics, knitted fabrics or non-woven fabrics, can be widely applied to the fields of clothing material industries, decoration carpets and the like, and has a wide industrial application prospect.

The invention discloses a filler, synthetic rubber and wet rubber compound integrated production method. A filler is selected from carbon black, white carbon black or a combination of the carbon black and the white carbon black. Compared with traditional and respective independent technologies, the method disclosed in the invention has the advantages of omitting of the post-treatment technologies of the filler and a synthetic rubber, realization of the cycle of sodium carbonate, and full utilization of carbon dioxide and heat generated in a traditional carbon black production technology. So the method can reduce production equipment and simultaneously realize the low carbon and low pollution discharge through the integrated optimization of the process flow in order to reach the recycle purpose.

The invention relates to a preparation method of AdBlue. The method comprises the following steps: 1, carrying out pressurizing sending on carbon dioxide and ammonia into a urea synthesis tower, and reacting at 150-200DEG C to obtain a synthetic reaction solution; 2, carrying out stripping, steaming and decomposition on excess ammonia and unconverted methylamine; 3, carrying out vacuum pre-concentration and evaporation separation on the synthetic reaction solution to obtain molten urea; 4, treating industrial water to obtain highly pure water; 5, mixing the molten urea with the highly pure water to prepare crude AdBlue; and 6, carrying out ultrafiltration treatment on the crude AdBlue to obtain the AdBlue. The method simplifies present production technologies, allows the AdBlue with high added values to be produced through original production technologies, allows the quality level of theobtained AdBlue to meet or exceed all present quality standards of AdBlue, reduces the cost, and reduces the environmental pollution.

The invention discloses a preparation method of a porous ZnO block material. The method comprises the following steps: dissolving a raw material zinc acetate in an ammonia water solution of citric acid, adding a certain concentration of a compounded dispersant, carrying out a gelatinizing process to form a spatial network structure in order to make zinc ions uniformly exist in the network structure, gelatinizing the obtained material, carrying out dry gelatinization, carrying out direct compaction molding, and sintering obtained blocks to obtain the porous ZnO block material. The method has the advantages of short preparation period, simple technology and device, low cost, and realization of uniform dimensions and uniform distribution of apertures of the obtained porous material through a proper dispersant formula.

A hammer type shearing granulator comprises a granulating cabin (2) provided with a feeding port (1) and a discharging port (11), a blade support (4) and shearing blades (3) installed on the blade support, wherein the blade support (4) is installed in the granulating cabin and can rotate around a horizontal central shaft (5). The outer end of the central shaft of the blade support is connected with a power transmission device. The blade support is of a transversely arranged cylindrical-cage-shaped structure, cylindrical-cage-shaped strips (4a) are evenly distributed on the outer circumferential face of the blade support, each blade is of a structure with a single side or double sides provided with edges, installation holes (3a) capable of being freely sleeved on the cage strips (4a) are arranged at one ends or two ends of the blades, at least two blades are evenly installed on each cage strip, the blades on two adjacent cage strips are arranged in staggered mode, and a screen net (10) is arranged at the position of the discharging port of the granulating cabin. Expansion tobacco stalk granulation is performed by means of the hammer type shearing granulator, particle shape of ternary porous particles of expansion tobacco stalk is changed, production yield is improved, a product filling value is improved, and service life of the blades is prolonged.

The invention discloses a method for the integrated production of carbon black and white carbon black. Compared with the traditional mutually-independent processes, the method has the effects that the cyclic utilization of sodium carbonate is realized; and carbon dioxide and heat which are generated in the traditional carbon black production process are utilized fully. Thus, by integrating and optimizing the process flows, the purposes of low carbon emission, low pollution emission and cyclic utilization are realized.

The invention discloses a preparation method of vehicle urea. The preparation method comprises the following steps: (S1) synthesizing ammonia and carbon dioxide so as to obtain fused urea, wherein the mass concentration of the fused urea is 80%, and the mass percentage of biuret is less than or equal to 0.25%; (S2) treating desalted water by virtue of water refining equipment, so as to obtain refined water with a resistivity of 18Mohm.cm-20Mohm.cm; (S3) simultaneously adding the fused urea obtained in the step (S1) and the refined water obtained in the step (S2) into a batching tank in a proportion of 1 to 1.5, stirring for 30 minutes or longer, so as to obtain a urea solution with a mass concentration of 31.5%-32%; (S4) finely adjusting the amount of the fused urea or the refined water, so as to obtain the urea solution with a mass concentration of 32.5%, namely crude urea; (S5) filtering the crude urea so as to obtain vehicle urea; and (S6) conveying the vehicle urea into a finished product tank, and pumping the vehicle urea into a filling machine by virtue of a finished product pump, so as to obtain the finished vehicle urea. By utilizing the fused urea as the raw material, the vehicle urea with relatively high quality is obtained.

The invention discloses a preparation method of a high-water-absorption polymer. The polymer comprises the following components (in parts by weight): 40g to 45g of acrylic acid, 55g to 60g of water, 19.28g to 20.5g of sodium hydroxide, 0.01g to 0.02g of N, N' methylene bis-alkenyl amide, 1g to 2g of 3% potassium persulfate aqueous solution, 0.05g to 0.1g of sorbide glycerinum-laurate and 1g to 2g of 3% potassium persulfate aqueous solution. The preparation method comprises the following steps: preparing the acrylic acid aqueous solution with concentration of 55 to 60 percent; adding a cross-linking agent, a surface active agent and a polymerization initiator into the acrylic acid aqueous solution, blowing nitrogen, sending the solution into a blender at a feed speed of 250g/min, sending the 3% sodium bisulfate aqueous solution into the blender at a feed speed of 6 to 10 g/min, enabling the material mixed by the blender to rapidly flow into a screw squeezing device to be polymerized, controlling the temperature at 103 DEG C, discharging the hydrogel polymer out of the squeezing device, drying by virtue of hot air at 160 DEG C, and crushing to obtain the high-water-absorption polymer. The preparation method is stable in product quality, high in yield, labor-saving and high in efficiency.

The invention relates to the field of foods, and discloses probiotic tablets based on lactobacillus plantarum and a preparation method of the probiotic tablets. Lactobacillus plantarum freeze-dried powder, tea leaf theanine, konjaku flour, direct compression auxiliary materials, vitamin C and magnesium stearate are compounded, the direct compression auxiliary materials are adopted, and a direct compression technique is adopted, so that process flows for granulation and the like can be omitted, and the energy consumption can be reduced, the productivity can be increased, and the properties of the tablets can also be improved notably. The probiotic tablets can reduce weight, reduce in vivo fat accumulation, reduce ratio of internal organs of the body and body fat ratio, reduce leptin level and reduce blood lipid, and can be used for preventing and treating obesity. In addition, lactobacillus plantarum 1701 contained in the tablets also has favorable tolerance and adhesion property. The bacterial strains after being inactivated also have the function of reducing weight, so that products containing the bacterial strains are good in stability and long in quality guarantee period.

The invention discloses a method for preparing a zeolitic particulate material from washed coal gangue. The method comprises the following steps: crushing and sieving the ash residue obtained after the washed coal gangue is calcinated at a temperature of 650 to 900 DEG C, and adding the obtained particulate matter to a sodium hydroxide solution, so that an active silicon aluminum component in theparticulate matter is reacted with sodium hydroxide to crystallize and grow zeolite 4A on the surface of the particulate matter, namely, the zeolitic particulate material. The zeolitic granular material prepared from the washed coal gangue disclosed by the invention has the advantages of wide source of raw materials, comprehensive utilization of waste, and low preparation cost, the synthetic zeolite is mainly distributed on the surface of the particulate matter, the speed of adsorbing a pollutant is fast, and the zeolitic particulate material can be widely applied to a percolation material forpolluted rainwater treatment in the construction of the sponge city, and a percolation material for the constructed wetland.

The invention provides an azelnidipine preparation with combination of two disintegrating agents. The azelnidipine preparation is prepared from azelnidipine, two combined disintegrating agents in different proportions and other pharmaceutic adjuvants, wherein the combined disintegrating agents are prepared from calcium carboxymethyl celluloses and low-substituted hydroxypropyl celluloses; the adding amount of the calcium carboxymethyl celluloses accounts for 13% to 120% of that of the low-substituted hydroxypropyl celluloses; the other pharmaceutic adjuvants contain one or multiple types of filling agents, adhesives or lubricants. The azelnidipine preparation is simple in preparation method and controllable in quality, and has the high fitting degree with the in-vitro stripping curve of a product prepared by a specified pharmaceutical factory while having the bioequivalence at the same time. Thus, the efficacy and safety of the azelnidipine preparation in clinical applications are ensured.

The invention relates to a crystallizing method of a urea solution and particularly relates to a producing method of urea that is a raw material of a diesel vehicle exhaust treating liquid. The method includes (1) a step of preparing urea, namely a step of conveying a urea synthesis reaction solution in a synthesis stage of a urea production device into a urea solution tank to obtain an initial urea solution, (2) a step of removing excessive ammonium and carbon dioxide from the initial urea solution through flash evaporation, (3) a step of conveying the urea synthesis reaction solution into a vacuum flash evaporation crystallization kettle and performing vacuum flash evaporation crystallization, (4) a step of preparing high-purity water, namely a step of desalting industrial water, filtering the water with activated carbon, removing macro-molecule substances through a reverse osmosis membrane apparatus, removing TOC, deoxygenizing the water, disinfecting the water and filtering the water, and (5) a step of mixing crystallized urea and the high-purity water, and fully stirring the crystallized urea and the high-purity water to obtain the urea solution used for vehicles. The urea solution used for vehicles can reduce environment pollution, saves a cost and is of great significance for environment protection.

The invention discloses a preparation method of a titanium dioxide porous material. The method comprises the following steps: synthesizing xerogel powder from titanium sulfate by adopting anhydrous ethanol and deionized water as solvents and ethylene diamine tetraacetic acid, citric acid, diethylenetriaminepentacarboxylic acid, tartaric acid, ethylene glycol and polyethylene glycol as dispersants, carrying out direct dry press molding on the xerogel powder to obtain a block material, and carrying out heat treatment to obtain the titanium dioxide porous material. The method has the advantages of simple technology, short period, simple device, low cost, and realization of high controllability of the dimensions and the distribution of apertures of the obtained porous material.

The invention discloses a granulation process for a high-compaction microcrystalline graphite negative electrode material. The preparation method comprises the following steps of putting small-granularity microcrystalline graphite powder and a large-granularity adhesive into a fusion machine for mixing, heating the fusion machine to a temperature 2-4 DEG C lower than the softening point of the adhesive, and carrying out fusion granulation for 60-120 minutes to obtain softened composite particles of microcrystalline graphite and the adhesive, and heating the fusion machine to 500-700 DEG C, keeping the temperature for 1-3 hours, cooling the material to room temperature, graphitizing, screening, demagnetizing and packaging to obtain the secondary composite particles for the high-compaction microcrystalline graphite negative electrode material. The method disclosed by the invention solves the problems that granulation equipment is overloaded and abraded due to high adhesive content, and faults are easy to occur.

The invention provides a urethral stent for non-invasive surgery. The urethral stent comprises a main body structure made of a polydodecyl glyceride (PGD) material and a degradable alloy wire, whereinthe main body structure is in a thin strip shape at normal temperature and is converted into a spiral structure after being implanted into a human body; and the degradable alloy wire is coiled on theouter surface of the main body structure. The main body structure of the stent is made of polydodecyl glyceride, and the main body structure is in a slender strip shape at normal temperature, so thatthe main body structure is convenient to insert into a urethra in an operation process; and the polydodecyl glyceride has a memory effect at body temperature, can deform after being implanted into ahuman body to become a spiral structure, and plays a role in expanding the urethra, so that operation difficulty is obviously reduced, and comfort of the implanted stent is improved. According to theinvention, the degradable alloy wire rod is coiled on the main body structure, so that the stent structure can be supported, and meanwhile, the stent structure can be deformed together with the PGD material to play a role in expanding the urethra.

The invention discloses a filter for a granulator. The filter comprises a screen plate, an ox horn scraper, a porous flange, a discharging part and a granule discharging flange. The ox horn scraper is matched with a screen plate impurity removal notch, so that impurities and molten materials are effectively separated, and separation of the molten materials is not affected; the ox horn scraper tightly attached to the screen plate to rotate anticlockwise, normal materials are extruded through the screen plate under the extrusion and ox horn scraping and pressing effects, the materials are conveyed, the materials which are not completely molten can be further extruded and molten, the impurities in the materials are separated from the molten materials, and the effect of auxiliary extrusion and melting is achieved; and complete material melting is ensured, the material compactness is good, a good granulating mechanical property is achieved, the strength is high, the purity of a granulated material and the granulating quality are improved, and practicability is good.

The invention discloses a preparing method for a porous metastable stable Bi2SiO5 block. Absolute ethyl alcohol and deionized water serve as solvents, ethylenediaminetetraacetic acid, citric acid, diethylenetriamine pentabasic acid, tartaric acid, ethylene glycol, polyethylene glycol and the like serve as dispersing agents, gelatinization is carried out at a certain temperature, and dried gel powder is obtained after drying; then, the dried gel powder is directly subjected to dry pressing forming, a block material is formed and subjected to heat treatment, and the porous metastable stable Bi2SiO5 block can be obtained. The method is simple in process, short in period, simple in equipment and low in cost, and the obtained porous material is high in controllability over the pore size and distribution.

The invention discloses a flunarizine hydrochloride capsule preparation and a preparation method thereof. The flunarizine hydrochloride capsule preparation is prepared from the following raw materials in parts by weight: 2-10 parts of flunarizine hydrochloride, 100-150 parts of lactose, 10-40 parts of starch, 0.1-1 part of a flow aid and 2-20 parts of a lubricant. The flunarizine hydrochloride capsule prepared by the invention is placed for 3 months under a high-temperature experimental condition, the dissolution curve of the flunarizine hydrochloride capsule in a medium with a pH value of 3.0 has no obvious change, and an f2 value is greater than 50; and the dissolution curve of an original developed preparation is obviously reduced, and the f2 value is 12.7. The in-vitro dissolution curve stability of the flunarizine hydrochloride capsule prepared by the invention is superior to the in-vitro dissolution curve stability of the original preparation.

The invention discloses production equipment and process for preparing a breathable film through an one-step method. The production equipment comprises a rack, a collecting hopper, a double-rotor continuous internal mixer and a casting machine; the collecting hopper is fixedly installed on the rack, a feeding port is formed in the upper end of the collecting hopper, and a first discharging port isformed in the lower end of the collecting hopper; an internal mixing barrel on the double-rotor continuous internal mixer is fixedly installed on the rack, and the internal mixing barrel is located below the material collecting hopper; a first material receiving opening and a second material discharging opening are formed in the internal mixing barrel, and the first material receiving opening communicates with the first material discharging opening; a casting screw cylinder on the casting machine is arranged on the rack through a supporting frame, a second material receiving opening is formedin the casting screw cylinder, and the second material receiving opening communicates with the second discharging opening through a pipeline; and the tail end of the casting screw cylinder is connected with a casting mold. Through the stirring of the internal mixing cylinder, the raw material is fully and uniformly mixed and primarily plasticized, and continuously enters the casting screw cylinder in a semi-molten state in the mixing motion to be plasticized again, so that the raw material low-temperature mixing plasticizing effect is good, and the coke phenomenon in the casting screw cylinder and the casting mold can be reduced.