6results about How to "Reduce sodium" patented technology

This invention discloses a method for preparing nano-boehmite and its application in lithium-ion battery separators, belonging to the field of inorganic nanomaterial preparation technology. The method includes five steps: raw material calcination and activation, preparation of precursor slurry, hydrothermal synthesis reaction, washing and filtration, and drying and depolymerization. Calcination is carried out in a dynamic calcination furnace, whose exhaust mechanism can promptly remove water vapor. During discharge, the switching mechanism automatically opens the discharge cover, achieving continuous production with no material sticking to the wall and no residue. The obtained nano-boehmite is characterized by low sodium content, uniform particle size, and good dispersibility. This material can be formulated with binders and other agents to form a ceramic coating slurry. After coating and drying, a robust nano-ceramic coating is formed on the surface of a polyolefin-based membrane. This coating significantly improves the thermal stability, electrolyte wettability, and puncture resistance of the separator, thereby improving the battery's safety performance and cycle life.

This invention discloses a pressure-resistant, high-gravity reaction device and a method for preparing low-sodium boehmite. The device includes a packing layer, which is divided into an upper packing layer and a lower packing layer. The upper packing layer is equipped with an upper baffle and an upper packing annular column. The upper baffle is a disk with one or more concentric concave annular grooves, and the upper packing annular column is a multi-layered concentric annular column filled with packing. The lower packing layer is equipped with a lower baffle and a lower packing annular column. The lower packing annular column is a multi-layered concentric annular column filled with packing, and the lower baffle is a disk with at least one concentric concave annular groove, which is arranged radially from the outer edge to the inner edge. The special packing structure solves the sealing problem without adding new sealing devices, controls the fluid flow path, is suitable for pressurized conditions, and improves mass transfer efficiency. Using this device in processes such as carbon fractionation for preparing boehmite slurry, rapid slurry heating, and sodium-free aging not only prevents the generation of impurities but also effectively reduces the sodium content of the product.

The invention provides low-sodium pseudo-boehmite and a preparation method of the low-sodium pseudo-boehmite. The preparation method comprises the following steps: uniformly mixing a sodium-containing aluminum source, a fatty amine compound and water to obtain slurry A; wherein the mass ratio of the sodium-containing aluminum source to the fatty amine compound is (0.1-1.5): 1; adding an aluminum salt aqueous solution into the slurry A for reaction, and filtering to obtain a filter cake B; washing the filter cake B with an ammonium salt aqueous solution to obtain a filter cake C; and heating and aging the filter cake C, filtering, washing and drying to obtain the low-sodium pseudo-boehmite. The sodium-containing aluminum source is firstly mixed with the fatty amine compound, so that the elution efficiency of sodium ions from the pseudo-boehmite can be improved, and the content of the sodium ions in the pseudo-boehmite is reduced. In addition, ammonium ion exchange is introduced before pseudo-boehmite is formed, so that the exchange efficiency between ammonium ions and sodium ions is enhanced, and the sodium content is further reduced.

The invention provides a low-sodium high-crystallinity Y-type molecular sieve and a preparation method thereof. The preparation method comprises the following steps: mixing and pulping a NaY molecular sieve, a first inorganic salt and water to form slurry, adding an acidic buffer solution to form a first solution, adjusting the pH value of the first solution to 3.8-4.0, and carrying out ion exchange, filtration, washing and wet baking to obtain an intermediate molecular sieve; and mixing and pulping the intermediate molecular sieve, a second inorganic salt and water to form a slurry, adding an alkaline buffer solution to form a second solution, adjusting the pH value of the second solution to 10.5-12, and carrying out ion exchange, slurry filtration, water washing and wet baking in a pressurized environment to obtain the low-sodium high-crystallinity Y molecular sieve. The invention also provides the low-sodium high-crystallinity Y-type molecular sieve prepared by the preparation method. The preparation method can effectively reduce the sodium content of the molecular sieve and prevent the crystallinity of the molecular sieve from being damaged.

The application relates to the technical field of inorganic porous materials, and particularly discloses a preparation method of pseudo-boehmite for chloromethane. The preparation method comprises the following steps: S1: adding a sodium-free aluminum salt, zirconium nitrate pentahydrate and tetrabutyl titanate into a mixed solvent, adding a complexing agent, then adding nano-boehmite, uniformly mixing, adjusting the pH value to 7.5-8.0, increasing the temperature to 25-35 DEG C, mixing, adjusting the pH value to 5.5-6.0, mixing, and obtaining a uniform sol; S2: mixing urea and ammonium bicarbonate in water, adding zirconium ammonium carbonate, and obtaining a mixed solution B; S3: adding the mixed solution B into the uniform sol, uniformly mixing, performing gradient temperature reaction, performing solid-liquid separation, washing, drying, and obtaining the pseudo-boehmite for chloromethane. The pseudo-boehmite for chloromethane prepared by the application has extremely low sodium content, high specific surface area and excellent thermal stability.

The invention relates to the technical field of seasoning processing, in particular to a preparation method of a rare edible mushroom byproduct salt-reducing and freshness-increasing compound seasoning, which is characterized in that processing byproducts of oudemansiella radicata, pleurotus eryngii, volvariella volvacea, tricholoma matsutake, morchella esculenta, cordyceps militaris and lentinula edodes are used as main raw materials, and are compounded with apples and carrots to prepare the rare edible mushroom byproduct salt-reducing and freshness-increasing compound seasoning. The preparation method comprises the following steps: fully releasing delicate flavor components by virtue of a synergistic process of steam explosion, belt type microwave flavor enhancement and ultrasonic-assisted directional enzymolysis in sequence, compounding with a flavor enhancement material, low-sodium salt and a filling agent, and finally granulating and drying to obtain a finished product. According to the method, high-value utilization of edible mushroom byproducts is achieved, the sodium chloride content of the prepared seasoning is smaller than or equal to 20%, the sodium content is remarkably reduced, meanwhile, through the synergistic effect of natural freshness increasing components, the product is rich in delicate flavor and rich in flavor level, and the healthy target of reducing salt without freshness is achieved. The method is efficient in process, natural in product and suitable for industrial production.