8results about How to "Reduce package" patented technology

The invention belongs to the technical field of dibromohydantoin production, and particularly provides a dibromohydantoin synthesis method which comprises the following steps: S1, preparing a raw material aqueous solution, namely respectively mixing dimethyl hydantoin, sodium bromide and liquid caustic soda NaOH with deionized water to form a dimethyl hydantoin aqueous solution, a sodium bromide aqueous solution and a liquid caustic soda NaOH aqueous solution; s2, premixing the raw material aqueous solution, namely mixing the aqueous solution of dimethyl hydantoin, sodium bromide and caustic soda liquid NaOH prepared in S1 to obtain a premix; s3, electrochemical in-situ bromination reaction: introducing the premix into a micro-channel reactor provided with an electrolysis electrode, and applying current to the premix to obtain a dibromohydantoin initial solution; and S4, crystallizing, separating and drying the product, carrying out cooling crystallization through a three-stage stepped cooling method to obtain a dibromohydantoin crystal, carrying out centrifugal separation to obtain a dibromohydantoin wet product, and then drying to obtain a dibromohydantoin finished product. The method can improve the generation stability and the product quality of the dibromohydantoin.

The application discloses a kind of high density low rebound shotcrete and preparation method thereof, it is related to shotcrete field, and preparation method includes: (1), respectively to cementitious material, fine aggregate, coarse aggregate is using MAA model to be packed and the design ratio of each raw material in interior is obtained;(2), cementitious material, fine aggregate, coarse aggregate and the rebounding agent of design ratio obtained according to step (1) are fully mixed, water, water reducing agent is mixed, then by the way of mixing with pressurized air, incorporate accelerator, obtain high density low rebound shotcrete.The application uses early strength rebounding agent, improves the pumpability of shotcrete, accelerates the early hydration of concrete, under the joint action of alkali-free accelerator, rapidly improves the early mechanical properties of shotcrete, improves shotcrete construction efficiency.Multiple close packing is used, and cementitious material, fine aggregate, coarse aggregate respectively form close packing structure, effectively improve the plastic viscosity of paste and the compactness of concrete.

This invention discloses a low-carbon, high-density shotcrete admixture, its preparation method, and its application, relating to the field of concrete admixtures in building materials. The admixture comprises the following components by mass percentage: 53-73% rheological component, 15-25% thickening component, 10-18% early-strength component, and 0.5-4% setting regulator component. The rheological component includes manganese slag powder and silica fume, and the thickening component is tailings powder loaded with nano-modified cellulose ether. This invention increases the cohesiveness of shotcrete and improves the slurry encapsulation of concrete through the thickening component, increases the yield stress of concrete through the rheological component, and synergistically improves the adhesion and rapid hardening performance of the material after spraying by combining with the early-strength component, thereby reducing the rebound rate. Furthermore, the nanoparticles loaded on organic matter hydrate in the pores, directionally filling harmful pores, effectively improving the density and strength of shotcrete, achieving low-carbon, low-rebound, and high-density shotcrete.

The utility model discloses a vibrating filter belongs to vibrating filter technical field, including body, storage tank and adjusting part, the storage tank sets up on the body, has been seted up in the storage tank and has the discharge gate, adjusting part sets up on the storage tank, the adjusting part includes the adjusting plate of adjusting discharge gate size, is connected with the adjusting lever on the adjusting plate, a plurality of hook plate of different height is arranged to the both sides of adjusting lever, the hanging rod that hangs on the hook plate is fixed on the adjusting lever, through the size of adjusting the discharge gate of storage tank, can change the flow of material from the discharge gate, can reduce the thickness of material layer at fixed landing point, reduce the package and extrusion of upper layer big material to lower layer small material, make small material more easily contact screen and smoothly screen, effectively solve the problem of not enough filtration.

The utility model relates to a kind of special crushing system for lithium battery, the crushing system includes crusher;The crusher is four-axis crusher;The crushing system further includes breaker, the breaker is connected with crusher, located after crusher.The design is reasonable, simple structure, adopts four-axis crusher to break lithium battery, and increases breaker, and the broken lithium battery is broken, and the size of discharge is uniform, and the powder rate is high.

The application relates to the technical field of inorganic chemical synthesis, in particular to a sodium carbonate preparation method based on ternary synthesis technology. The method takes sodium chloride, liquid ammonia and carbon dioxide as ternary raw materials, and through a'segmented carbonization-gradient temperature control crystallization-CO2 closed loop recovery-mother liquor optimization treatment' synergistic process, first, uniform crystal nuclei are induced through low-temperature pre-carbonization, then, sufficient reaction is promoted through medium-temperature deep carbonization, and the crystal structure is optimized by combining gradient cooling crystallization and aging, and the efficient recycling of carbon, ammonia and salt resources is realized. The application improves the carbon dioxide utilization rate and the product purity, optimizes the crystal particle size uniformity, reduces the energy consumption and the environmental protection load, the process is stable and easy to control, and has strong industrialization adaptability, and the obtained sodium carbonate can meet the strict requirements in the fields such as food processing, and has economic and environmental benefits.

The present application relates to wastewater treatment technical field, disclose a kind of processing method of inorganic fluorine-containing wastewater, comprising the following steps: the pH of inorganic fluorine-containing wastewater is adjusted to 2~4, calcium carbonate is loaded into carbide slag, and reaction is carried out;Coagulant is added to the wastewater after step S1 processing, coagulation and precipitation are carried out, and the precipitate is separated out.In the present application, the fluorine ion in wastewater is converted into calcium fluoride by using calcium carbonate loaded carbide slag, which can reduce the adhesion and wrapping of calcium fluoride on the surface of carbide slag, thereby achieving better wastewater defluorination effect under smaller carbide slag dosage, which is beneficial to reduce sludge amount.

The invention relates to the field of biological medicine, in particular to a chlorzoxazone preparation process which comprises synthesis of 2-nitro-4-chlorophenol, synthesis of a 2-amino-4-chlorophenol methanol solution, preparation of a chlorzoxazone crude product and refining of chlorzoxazone, the 2-nitro-4-chlorophenol can be synthesized at normal temperature and normal pressure by adopting p-chlorophenol with lower cost as a starting material, and the 2-nitro-4-chlorophenol can be used for preparing chlorzoxazone. The addition rate of hydrochloric acid is strictly controlled in the preparation of the crude product, urea byproducts generated by urea digestion can be avoided, impurity wrapping of the product can be reduced through hot filtration and slow cooling crystallization, the purity of the product is further improved, and in the refining link, activated carbon decoloration can adsorb small molecular impurities, and the purity of the product is improved. High-content impurities and trace single impurities can be removed through two times of crystallization, high-purity purification of the product is achieved, and meanwhile salt slag pollution generated by traditional acid-base refining is avoided.