36 results about "Sodium aluminum hydride" patented technology

A process for production of sodium borohydride. The process comprises the steps of: (a) combining a boric acid ester, B(OR)₃ and sodium aluminum hydride to produce sodium borohydride and Al(OR)₃; and (b) combining Al(OR)₃ and sulfuric acid to produce alum and ROH.

The invention belongs to the technical field of oil exploitation, and relates to a hydrogenation heat gas chemical yield increasing solution component capable of increasing permeability of a shallow well and a near wellbore region. The solution component comprises first solution and second solution, the mass ratio of the first solution to the second solution is 1:1, the first solution comprises 37-43% of ammonium nitrate NH4NO3, 23-26% of urea CO(NH2)2, 5-8% of decaborane B10H14, 1-2% of glucose C6H12O6, 0.5-1.5% of methenamine (CH2)6N4 and 19.5-33.5% of water. The second solution comprises 44-48% of sodium nitrate NaNO3, 15-20% of sodium nitrite NaNO2, 17-21% of sodium aluminum hydride NaAlH4 and 15-19% of tetrachloroethylene C2Cl4. By the aid of the solution component, porosity of an ore bed can be increased, accordingly, permeability is increased, and the yield can be increased by 2-10 times.

The invention relates to a method for producing polycrystalline silicon by utilizing a sodium fluosilicate byproduct of a phosphate fertilizer. The sodium fluosilicate byproduct of the phosphate fertilizer is subjected to paralysis to form silicon tetrafluoride and sodium aluminum hydride, which serve as raw materials to prepare silane, and the silane is cracked to form the polycrystalline silicon and hydrogen, wherein the hydrogen is circulated and used for hydrogenating sodium aluminum tetrafluoride. A hydrofluoric acid byproduct generated in the reaction process is used for producing fluoride salt products. In the method for producing the polycrystalline silicon, the byproduct is taken as a raw material, the price is low, the process is simple, easy to operate, environment-friendly and energy-saving; the produced polycrystalline silicon has low impurity content and high purity; in addition, the hydrofluoric acid byproduct in the production can be used for producing the fluoride salt products, so that the production cost is further reduced, and the method has better economic, social and environmental benefits.

The invention relates to a catalyst of sodium aluminum hydride coordination oxide and a preparation method thereof. A chemical general formula of the catalyst is RExAly, wherein x is smaller than 10 but larger than or equal to 1, and y is smaller than 20 but larger than or equal to 1. In the formula, the RE is Sc, Y, La, Ce, Pr, Sm, Nd, Ml (lanthanum-rich mixed tombarthite) or Mm (cerium-rich mixed tombarthite). The preparation method is as follows: according to a chemical amount proportion of the RExAly, RE and the Al block-shaped metal raw materials are weighed and proportionally mixed; theraw materials are then melted into an RExAly alloy cast ingot under an argon protection atmosphere and then crushed and put into a high-power ball mill for ball milling; and then the RExAly catalyst with a particle size of micro-nanometer level is obtained. The preparation process of the catalyst is simple, the operation is easy, and the cost is low. The catalyst is used for reversible catalysis hydrogen storage of sodium aluminum hydride, greatly improves the dynamic performance of the sodium aluminum hydride in terms of hydrogen absorption and release and does not undergo elementary reactionwith a matrix hydrogen storage material group to generate inert byproducts so that the system reversible hydrogen storage amount is not damaged.

The invention discloses sodium aluminum hydride and rare earth-nickel base alloy composite hydrogen storage material consisting of sodium aluminum hydride and rare earth-nickel base alloy. The mass percent of the rare earth-nickel base alloy is between 5 and 35 percent and the balance being sodium aluminum hydride; wherein the rare earth-nickel base alloy has a chemical general expression of RENi5, and RE in the general expression can be La, Ce, Pr, Nd, Y, Ml or Mm. The preparation method for the sodium aluminum hydride and rare earth-nickel base alloy composite hydrogen storage material is a high-energy ball milling method. The preparation method is simple. The prepared sodium aluminum hydride and rare earth-nickel base alloy composite hydrogen storage material has good activation hydrogen storage performance and hydrogen discharging kinetics, and a reversible hydrogen storage capacity of above 3.7 weight percent without adding a special catalyst. The composite hydrogen storage material can be applied to miniature mobile phones, laptops, the hydrogen supply sources of independent galvanic pile systems, the field of hydrogen purification, and the like.

The present invention relates to the method of reducing aromatic heterocyclic carboxylic ester to form alcohol. Aromatic heterocyclic carboxylic ester 5-methylol thiazole and 3-methylol pyridine are reduced with bis(2-methoxyoxethyl) sodium aluminum hydride as the reductant to obtain corresponding alcohol. Bis(2-methoxyoxethyl) sodium aluminum hydride has excellent dissolvability and this makes it possible to select solvent according to the reduced matter. Bis(2-methoxyoxethyl) sodium aluminum hydride has excellent heat stability, is stable at temperature up to 140 deg.c, will not burn spontaneously in the air and thus is safe. Bis(2-methoxyoxethyl) sodium aluminum hydride and the reduced matter 5- thiazolyl ethyl formate and 3-pyridyl ethyl formate can be dissolved well in arene, cheaper than tetrahydrofuran and easier in separation.

The invention relates to an improvement on the hydrogen storage material, especially providing a high-capacity coordinated sodium aluminum hydride storage material which is impure with transition metal. Said hydrogen system is formed by basic material, catalyst, and auxiliary structure. In the doping process, it directly uses transition metal as catalyst, and adding alkali metal/alkali hydride or alkaline earth metal/alkaline earth hydride as auxiliary structure at the same time; and processing ball grinding under inertia gas protection or reactive hydrogen gas. The invention has the advantages that: the method is simple, with easy operation and lower cost, while it can solve the problems of traditional techniques which will generate inertia by-product and foreign gas; and provided system has high capacity of hydrogen and high cycle stability. The actual hydrogen capacity can reach 4.7wt% in some system which is increased 40% than present ones.

The invention discloses a method for preparing fluorescent silicon oxide nanoparticles, which belongs to the technical field of silicon oxide particles. In the present invention, quartz sand is used as raw material to make silicon dioxide through nanometerization to make nano-silicon dioxide, and then the prepared nano-silicon dioxide and hydrofluoric acid form silicon fluoride, and then react with sodium aluminum hydride , to produce silane gas, and then use lycopene and fluorescein isothiocyanate to vaporize and mix with silane gas, add hydrogen peroxide and place it in a strong magnetic field for reaction, so as to obtain fluorescent silicon oxide nanoparticles. Examples prove that the present invention is safe to operate. By gasifying lycopene and fluorescein isothiocyanate extracted from tomatoes, it is environmentally friendly and at the same time enhances the fluorescence of fluorescent silicon oxide nanoparticles. In addition, hydrogen peroxide is added and placed in a strong magnetic field reaction, forming free radicals to generate corona, improving stability, and the prepared fluorescent silica nanoparticles have extremely narrow half-width of fluorescence spectrum, strong luminosity, and can be applied on a large scale.

A method for reducing a malonate having the formula R1R2C(CO2R3)(Co2R4) to a diol having the formula R1R2C(CH2OH)2 comprising treating said malonate with sodium aluminum hydride.

The invention provides a preparation method of silane. The method comprises steps of albite decomposition reaction, silicon fluoride purification and silane preparation, wherein the albite decomposition reaction comprises steps as follows: mixing albite, fluorite and sulfuric acid with concentration of 98% at a mass ratio of 1: (1.55-2.57): (3.28-4.62) and performing reaction at the temperature of 100-200 DEG C under the self-generated pressure to obtain solid residues and silicon fluoride contained gas; the silicon fluoride purification comprises steps as follows: performing dust removal on the silicon fluoride contained gas, liquefying the silicon fluoride contained gas after dust removal to obtain a silicon fluoride liquid, removing hydrogen fluoride in the silicon fluoride liquid to obtain a silicon fluoride liquid free of hydrogen fluoride, and gasifying the silicon fluoride liquid free of hydrogen fluoride to obtain pure silicon fluoride gas; and silane preparation comprises step as follows: introducing the pure silicon fluoride gas into a sodium aluminum hydride solution for reaction to obtain a silane product. According to the preparation method, gas products including silicon fluoride and sodium aluminum hydride which are generated after albite decomposition are mainly utilized and react to prepare silane, and one novel silane preparation method capable of realizing continuous production is provided.