5results about How to "Controllable reaction rate" patented technology

The invention relates to the technical field of battery negative electrode materials, in particular to a silicon-carbon negative electrode material and a preparation method of the silicon-carbon negative electrode material in a low-temperature silicon-carbon deposition mode. The method comprises the following steps: performing synchronous silicon-carbon deposition or step-by-step silicon-carbon deposition on carbon-based material particles in a fluidized bed at a relatively low temperature to form silicon-carbon intermediate phase particles, and further performing carbon coating to form the silicon-carbon negative electrode material. The low-temperature silicon-carbon deposition mode involved in the process can effectively control the stability of heat release of the chemical vapor deposition reaction in the aspect of operation and improve the uniformity of temperature field distribution in the reactor, so that the overall reaction rate is controllable, and parameters such as the particle size and the nano silicon content of the silicon-carbon negative electrode material are easy to regulate and control. When the preparation method provided by the scheme of the invention is adopted, on the basis of ensuring that the safety is effectively improved, the yield and the product quality of the silicon-carbon negative electrode material are obviously optimized, and the silicon-carbon negative electrode material shows excellent electrochemical performance.

The invention provides an MHP precipitation method based on a compound alkali precipitator and application of the MHP precipitation method, and the MHP precipitation method comprises the following steps: mixing laterite-nickel ore iron and aluminum removed liquid and a compound alkali solution for precipitation reaction to obtain cobalt nickel hydroxide slurry; the compound alkali in the compound alkali solution comprises a mixture of sodium carbonate and sodium hydroxide; and carrying out post-treatment on the cobalt nickel hydroxide slurry, and separating to obtain the MHP. According to the method, a sodium hydroxide and sodium carbonate compounded system is used as a precipitator, the MHP is prepared under the cooperation of sodium carbonate and sodium hydroxide, the content of manganese in the obtained MHP is remarkably reduced, the content of nickel and cobalt in the MHP is increased, the method has important significance for reducing the cost for preparing crystals through subsequent MHP refining, meanwhile, the reaction rate is more controllable, the obtained MHP is better in filtering performance, and the method is suitable for industrial production. The water content is lower.

The invention relates to a method for solidifying aeolian sand and resisting wind erosion by combining microorganisms with sugar calcium, which is characterized in that a sandy soil body is more sufficiently and efficiently solidified by utilizing a synergistic effect mechanism of combining MICP with sugar calcium, so that the purposes of enhancing the strength of the sandy soil body and resisting natural environment erosion are achieved; in the process of solidifying the sandy soil by combining sugar and calcium with MICP, the sugar and calcium can promote the growth of microorganisms, regulate the reaction environment and contribute to the generation of calcium carbonate precipitates, so that the sandy soil particles play a role in cementation, and meanwhile, the sugar and calcium are dissolved in water to release viscous substances, so that the generated calcium carbonate precipitates are more uniform, and the quality of the soil is improved. The effect of solidifying a sandy soil body is more obvious; the method adopts green and environment-friendly materials, is suitable for reinforcing a large-area sandy soil area, has a very remarkable curing effect, has the excellent characteristic of resisting natural environment erosion, and is widely applied to the fields of sandy soil curing, protection and the like.

The invention discloses a hydrogen production device and method based on aluminum-water reaction. The hydrogen production device comprises a reaction container, a water inlet pipe, a hydrogen outlet pipe, a bearing assembly, an aluminum alloy bar, a blow-off pipe, a monitoring assembly and a controller. The bearing assembly is fixedly arranged in the reaction container, and the multiple aluminum alloy bars are located in the bearing assembly; the water inlet pipe, the blow-off pipe and the hydrogen outlet pipe are respectively communicated with the reaction container; all the aluminum alloy bars in the reaction container are always located below the liquid level; the aluminum alloy bar reacts with water to generate hydrogen and reaction heat; the monitoring assembly is used for acquiring pressure data, temperature data and liquid level data in the reaction container in real time and transmitting the data to the controller; the controller can control the on-off of the water inlet pipe according to temperature data and control the on-off of the blow-off pipe according to liquid level data, and reaction heat is taken out through the discharge of inlet water and a reaction solution, so that the temperature and the liquid level in the reaction container are dynamically stable; and the controller can control the on-off of the hydrogen outlet pipe according to the pressure data, so that the discharge of hydrogen is controlled, and the pressure in the reaction container is dynamically stable. The reaction rate of hydrogen can be controlled, large-scale preparation of hydrogen is achieved, stable supply of hydrogen is guaranteed, the structure is compact, and practicability is high.

The invention discloses an environment-friendly long-acting antifouling paint and a preparation method thereof, and belongs to the technical field of paint materials and antifouling. The environment-friendly long-acting antifouling paint comprises the following components in parts by weight: 30-50 parts of a component A, 25-45 parts of a component B, 8-25 parts of a functional body, 1-5 parts of color paste and 0.3-3 parts of an auxiliary agent, the component A is an aliphatic isocyanate prepolymer which is prepared from aliphatic isocyanate and castor oil through a reaction, and the specific preparation raw materials comprise the following components in parts by weight: 20-40 parts of aliphatic isocyanate and 10-20 parts of castor oil; the component B is polyaspartic acid ester, and the molecular weight of the polyaspartic acid ester is 800-1500 g / mol; the castor oil has good reaction activity with aliphatic isocyanate, can significantly improve the flexibility of a prepolymer (polyurea precursor) and the cohesiveness with a base material, and can optimize the compatibility of the polyurea precursor with polyaspartic acid ester with the molecular weight of 800-1500 g / mol, thereby improving the mechanical stability and weather resistance of the whole polyurea paint coating. The technical problem that an existing coating material cannot give consideration to synergistic improvement of environmental protection property and mechanical property is solved.