9 results about "Molten salt" patented technology

A one-step process for preparing both cyanuramide and the ammonium hydrogen carbonate/sodium carbonate and ammonium chloride features that the synthetic amonia is directly delivered to the cyanuramide preparing step, where it is preheated to 350-400 deg.C and used as gas carrier of fluidized bed, and the gas from liquid urea washing tower is divdied into two channels, one returning back to crystallizer and used as cold gas and another being directly used to prepare ammonium hydrogen carbonate/sodium carbonate and ammonium chloiride. Its advantages are low cost and high catalytic efficiency.

The present invention provides a method for preparing a mordenite, which is a method for preparing the mordenite through a hydrothermal crystallization by using natural aluminosilicate minerals as total silicon sources and total aluminum sources, comprising the steps of: subjecting the natural aluminosilicate minerals to activation treatment which is an activation by sub-molten salt and an activation by thermal treatment; selecting and mixing the activated natural aluminosilicate minerals according to the silicon-to-aluminum ratio of the targeted mordenite, adding thereto deionized water, sodium hydroxide, crystal seed, a templating agent to obtain a reaction mixture; adjusting the reaction mixture by using an inorganic acid to have a pH of 10-13, and then aging it at 40-80° C. for 6-24 hours; and subjecting the aged reaction mixture to hydrothermal crystallization, and then filtering, washing, drying and calcinating the crystallized product to obtain the mordenite. The method for preparing a mordenite provided in the present invention enlarges the sources of raw materials for a molecular sieve, has a low cost and a simple process route, and can largely reduce the cost for synthesizing a molecular sieve.

Belonging to the technical field of catalysts for oxidation of benzene to maleic anhydride, the invention in particular relates to a catalyst for oxidation of benzene to maleic anhydride, a preparation method and application thereof. The catalyst for oxidation of benzene to maleic anhydride provided by the invention still has high conversion rate and maleic anhydride mass yield under the conditionof a low molten salt temperature. The catalyst with high activity and low molten salt service temperature provided by the invention can save a large amount of electrical power energy, and has a positive promoting effect on the maintenance and service life of the reaction device. Moreover, due to the high activity of the catalyst, the way of diluting the catalyst bed layer with a carrier can alsobe employed to reduce the catalyst consumption, thus further reducing the cost of enterprises.

The invention belongs to the field of energy storage materials adopting mixed molten salt and particularly relates to a mixed molten salt type heat transfer and storage working medium and an application thereof. The mixed molten salt type heat transfer and storage working medium is characterized by comprising components in percentage by mass as follows: 20wt%-30wt% of Ca(NO3)2*4H2O, 41wt%-50wt% of KNO3,5wt%-20wt% of NaNO3 and 10wt%-31wt% of NaNO2. The application of the mixed molten salt type heat transfer and storage working medium is characterized in that the mixed molten salt type heat transfer and storage working medium is widely applied to the medium-high-temperature heat transfer and heat storage fields, such as solar thermal power generation and storage, wind power curtailment, photoelectricity curtailment and ''coal to electricity'' heat storage and supply or industrial waste heat recovery and storage. The cost of ingredients used for preparing the mixed molten salt is low, and the preparation process is very simple; the thermophysical property of the mixed molten salt is very stable, the separation phenomenon of certain ingredients cannot be caused in the use process, the molten salt has a good heat transfer performance in a liquid-state temperature zone, and the saturated vapor pressure is lower than double barometric pressure. The working medium has low corrosivity for metal and has a wide application range.

The invention discloses a method for producing a ytterbium-doped lithium nickel cobalt manganese oxide material used for a lithium ion battery. The method comprises the following steps: a) weighing the raw materials according to stoichiometric ratio; b) adding absolute ethyl alcohol in the raw materials, performing ball milling and taking the materials out and drying the materials; c) adding acetate fibre, potassium chloride and sodium chloride in the raw materials obtained in the step 2) for mixing with molten salt and absolute ethyl alcohol, performing ball milling and drying the materials; and d) sintering the raw materials obtained in the step c), cooling the materials, washing the obtained powder, and drying to obtain the material. The ytterbium-doped lithium nickel cobalt manganese oxide material has higher discharge capacity and gram capacity; and has a hollow tube structure, through further processing, the tube wall is loosening so as to alleviate the volume expansion problem; inorganic filling material titanium dioxide in the acetate fibre is used, and is doped into crystal lattice of the ytterbium-doped lithium nickel cobalt manganese oxide material, so that stability of the ytterbium-doped lithium nickel cobalt manganese oxide material is improved, and the capacity attenuation problem of the lithium ion battery is improved.

The invention belongs to the technical field of catalysts, and discloses a photocatalyst transition metal halide molten salt preparation method and application, a low-valence compound stable to air and water is used as a Ti source, transition metal halide is used as molten salt, the Ti source and the molten salt are mixed and ground according to a molar ratio, and a photocatalyst transition metal halide molten salt is obtained; and heating the transition metal halide in an air atmosphere until the temperature is not lower than the melting point of the molten salt, enabling the transition metal halide to be in a molten state, preserving heat, washing with water, and separating to obtain the reduction-state TiO2-x photocatalyst which is rich in Ti < 3 + > and Ov and has excellent visible light response capability. The obtained product has excellent visible light response performance, and the defects that multiple steps are needed for traditional defect-state titanium dioxide preparation, and flammable and explosive reducing gas or other dangerous reducing agents or oxidizing agents are used are overcome; and the adopted Ti source is stable to air and water, so that the defects of adopting an organic solvent and other easily-hydrolyzed Ti sources are completely avoided, and industrialization is facilitated.

The invention provides an ethanol recovery device for an exhaust port of a molten salt furnace, and belongs to the technical field of pharmaceutical equipment. The device comprises a condensation structure and an intermittent waste gas suction structure, wherein the condensation structure comprises a condensation box and a plurality of condensation pipes, a fixed partition plate and a movable partition plate are arranged in the condensation box, the movable partition plate is located above the movable partition plate, a condensation cavity is formed between the fixed partition plate and the box bottom of the condensation box, and an air inlet cavity is formed between the fixed partition plate and the movable partition plate; a plurality of exhaust pipes are fixedly arranged on the fixed partition plate; the exhaust pipe communicates with the outside and the top of the condensation cavity. The movable partition plate is longitudinally and slidably connected to the exhaust pipe. A compression spring driving the movable partition plate to be close to the fixed partition plate is arranged between the exhaust pipe and the movable partition plate. The inlets of the condenser pipes are connected in parallel and then are connected with a medium inlet pipe; and the outlets of the condenser pipes are connected in parallel and then are connected with a medium outlet pipe; the intermittent waste gas suction structure can intermittently feed waste gas at the exhaust port of the molten salt furnace into the gas inlet cavity. The device has the advantages of high ethanol recovery rate and the like.

The invention discloses a preparation method of antibacterial high-strength glass, which comprises the following steps: (1) cleaning a glass substrate, and then putting the glass substrate into a drying oven for drying; (2) heating and melting potassium nitrate to prepare potassium nitrate molten salt; (3) preheating the glass substrate and then rapidly and completely immersing the glass substrate into the potassium nitrate fused salt for ion exchange; (4) taking out the glass substrate after the exchange is completed, cooling, and then cleaning and drying; (5) mixing potassium nitrate and silver nitrate, heating and melting to prepare mixed molten salt; (6) preheating the glass prepared in the step (4), and rapidly and completely immersing the glass into the mixed molten salt for ion exchange; and (7) taking out the glass prepared in the step (6), cooling, cleaning, and drying in a drying furnace to obtain a finished product. The antibacterial high-strength glass prepared by adopting an ion exchange technology is simple in process and relatively low in cost, large-scale production can be realized, and the produced glass is high in strength, good in antibacterial property and good in light transmittance.