13 results about "Oxalate salt" patented technology

The present application relates to a kind of preparation methods of pressurized water reactor MOX fuel powder, comprising the following steps: by mixed actinide salt and urea solid preparation mixed actinide eutectic, mixed actinide eutectic is directly obtained by deamination, denitrogenation / decarbonation, reduction, MOX fuel powder;The mixed actinide salt is hexavalent actinide nitrate and tetravalent actinide oxalate;When the mixed actinide salt is uranyl nitrate hexahydrate solid and thorium oxalate hexahydrate solid, the MOX fuel powder is (U x Th 1‑x )O2;When the mixed actinide salt is uranyl nitrate hexahydrate solid and plutonium oxalate hexahydrate solid, the MOX fuel powder is (U x Pu 1‑x )O2.The method provided by the present application has simple raw materials, can greatly simplify the preparation process of MOX fuel powder composed of UO2 and PuO2 (or ThO2), reduce the use of process reagent, and does not produce any process waste liquid, thereby providing a simple, high production efficiency, waste liquid-free, more economical and green MOX fuel powder preparation method.

A lithium primary battery 10 disclosed herein comprises a positive electrode 1, a negative electrode 2, and a non-aqueous electrolyte. The positive electrode 1 contains manganese dioxide. The negative electrode 2 contains at least one among metallic lithium and a lithium alloy. The non-aqueous electrolyte contains: at least one compound selected from the group consisting of oxalate salts, sulfonylimide salts, and isocyanate compounds; and a cyclic imide compound.

The application belongs to the technical field of adsorbing materials, and particularly relates to a high-selectivity strontium adsorbing material, a preparation method and application. The preparation method of the high-selectivity strontium adsorbing material comprises the following steps: loading rare earth ions on collagen fibers to obtain an intermediate material; and reacting an oxalate salt and a dimethylamine cation mixed solution with the intermediate material to generate a MOF crystal material with cavities in situ. The application takes dimethylamine cations as exchange ions, and the crystal structure formed by the coordination of rare earth ions and oxalate ions has a cavity size matching the hydrated ion radius of strontium, and has high selectivity to strontium ions, so that the strontium ions can be removed with high selectivity in the presence of various ions.

The application belongs to the technical field of compound preparation, and particularly relates to a preparation method of an alkali metal salt of an oxalate chelate structure, at least comprising the following steps: mixing tris(trimethylsilyl) phosphate, an oxalate and a phosphorus-containing or boron-containing fluorine compound in a first organic solvent, stirring and heating to obtain lithium phosphate, trimethyl fluorosilane gas, and difluorobisoxalate phosphate or difluorooxalate borate, filtering the reaction solution to obtain lithium phosphate solid and a difluorobisoxalate phosphate solution or a difluorooxalate borate solution; adding a second organic solvent for recrystallization after concentration; and obtaining difluorobisoxalate phosphate or difluorooxalate borate solid after filtration, and drying the solid under reduced pressure to obtain a finished product. The process is simple, and the cost is low. By-products lithium phosphate, potassium fluoride and hexamethyldisiloxane can be directly sold as products after purification. Therefore, the application has an atomic utilization rate close to 100%, no invalid waste, less three-waste emissions, and is friendly to the environment.

This invention belongs to the fields of medicinal chemistry and organic synthesis, specifically relating to a stable 3-aminocyclobutane-1,1-dicarboxylic acid diethyl oxalate and its application in the preparation of 3-(cholate-valerate)cyclobutane-1,1-dicarboxylic acid. This invention effectively solves the technical bottlenecks of poor stability, difficulty in purification, and storage by converting unstable free 3-aminocyclobutane-1,1-dicarboxylic acid diethyl oxalate into a specific organic acid salt form. More importantly, this invention discovers that this organic acid salt can be directly used as a reaction intermediate, and can be used efficiently in subsequent amide condensation reactions with cholic acid or its active derivatives without the separation of free amines. This method significantly improves the purity and yield of the key intermediate and its downstream product 3-(cholate-valerate)cyclobutane-1,1-dicarboxylic acid. The process is stable and simple to operate, providing a stable, controllable, and economical preparation route for the industrial production of 3-(cholate-valerate)cyclobutane-1,1-dicarboxylic acid, a key active pharmaceutical ingredient in the liver cancer prodrug LLC-202.

This invention discloses a solid waste-based highly active carbon material and its preparation method. It uses industrial waste distiller's grains and spent lithium-ion battery cathode materials as raw materials. The distiller's grains are crushed into particles, while the cathode materials are separated by acid dissolution and oxalate precipitation to obtain a lithium-ion solution and a transition metal oxalate precipitate. Cerium metal salt is added to the precipitate to obtain a non-lithium multi-metal precursor. The resulting distiller's grain particles and multi-metal precursor are then mixed and activated to modify the carbon material with transition metals. Finally, the carbon material is impregnated in the obtained lithium-ion solution and calcined at high temperature to obtain the final solid waste-based highly active carbon material. This invention uses solid waste as raw material and can fully utilize the various active metal components in spent lithium-ion batteries. The resulting solid waste-based highly active carbon material has good capture efficiency for organic molecules in high-temperature exhaust gases, thus possessing promising prospects for large-scale industrial preparation and application.

This invention discloses an antigen-protective melanoma specimen decolorization kit and its application, relating to the biological and medical fields. The kit consists of two separately packaged components: Component A is a lyophilized decolorizing agent powder composed of potassium permanganate, sodium acetate, and mannitol, with each component accounting for 0.1% of the total mass before lyophilization, 0.2% of the total mass of potassium permanganate, and 1.0% of the total mass of sodium acetate and mannitol, respectively. This antigen-protective melanoma specimen decolorization kit uses a lyophilized powder form for Component A and a 5x concentrated solution form for Component B, solving stability problems such as easy decomposition of potassium permanganate solution and easy crystallization of oxalate solution. Accelerated stability tests show that the pH value, effective concentration, and decolorization efficiency of the working solution after reconstitution / dilution do not change significantly, and the batch-to-batch CV value is <5%, meeting the quality control requirements of commercially available kits.

This invention provides a method for preparing rare earth oxides by alkaline leaching and degreasing. The method includes the following steps: providing a rare earth-containing organic phase extract; back-extracting the rare earth-containing organic phase extract using an oxalic acid solution; performing a first solid-liquid separation on the back-extracted product to obtain a crude rare earth oxalate salt; slurrying the crude rare earth oxalate salt to obtain a crude rare earth oxalate salt slurry; adjusting the pH of the crude rare earth oxalate salt slurry using an alkaline ammonium carbonate solution; and performing a second solid-liquid separation to obtain a rare earth-containing complex solution and a solid organic phase; adjusting the pH of the rare earth-containing complex solution to precipitate a solid; acid washing the precipitated solid to obtain a refined rare earth oxalate salt; and calcining the refined rare earth oxalate salt to obtain rare earth oxides. This invention achieves the separation of rare earth elements and organophosphorus compounds by the principle of complexation and dissolution of rare earth oxalate with an alkaline ammonium carbonate solution and the colloidal precipitation of an acidic organophosphorus extractant in an alkaline solution, thereby obtaining high-purity rare earth oxides.

The utility model discloses a device for removing oxalate from sodium aluminate solution, which comprises a box body, supporting legs arranged at the four corners of the bottom of the box body, a feed pipe and a liquid outlet pipe respectively inserted and fixed at the top and the bottom of the right side of the box body, and a cam driven by a driving motor to rotate, when the cam collides with the lifting plate, the filter cylinder can be shaken up and down, so that solid-liquid separation is realized under the action of the filter plate, and the liquid stains adhered to the surface of the filter residue on the filter plate can be shaken off through the shaking of the filter cylinder, thereby improving the solid-liquid separation effect. After the chuck is moved to the left by the starting hydraulic push rod, the square hole round pipe can be sleeved on the transmission square rod, and then the filter cylinder can be rotated by 180 degrees by starting the servo motor, the filter residue in the filter cylinder can be poured out and fall onto the conveyor belt, the filter residue can be conveyed through the circulating rotation of the conveyor belt, thereby improving the convenience of filter residue discharge.

This invention provides a method for preparing refined glufosinate. Unlike existing technologies that use glufosinate as a raw material, this method specifically uses crude 4-(hydroxymethylphosphono)-2-carbonylbutyric acid (containing oxalic acid) as the raw material. Based on this raw material, this invention specifically adds an alkaline reaction to pre-remove oxalate, resulting in oxalic acid residue <0.05%. When the specific alkaline is not ammonia, ammonia of at least the molar amount of the raw material needs to be added. Further alkaline is added to adjust the pH, and the mixture is continuously fed into a one-step enzymatic conversion system to obtain the corresponding refined glufosinate. Compared to the traditional process of preparing refined glufosinate using racemic glufosinate technical powder through a two-step enzymatic catalysis, this method features simpler processes, lower production costs, and greater applicability.

The present application relates to a kind of based on organic sulfonic acid scandium double salt precipitation scandium recovery method, comprising: using sulfuric acid to the scandium concentrate is treated by acid immersion to obtain the scandium-containing leaching solution;Scandium-containing leaching solution is adjusted to alkaline pH, and precipitate to obtain coarse scandium hydroxide;Coarse scandium hydroxide is reacted with organic sulfonic acid to obtain organic sulfonic acid scandium salt;Organic sulfonic acid scandium salt is mixed with saturated sulfate solution and carries out double salt precipitation, and separation is obtained containing scandium double salt;Scandium double salt is washed, precipitated by ammonia, acid dissolution, oxalate precipitation and high temperature calcination, and high-purity scandium oxide is obtained.The present application combines organic sulfonic acid scandium salt and sulfate for the first time to construct a new double salt precipitation system, which can realize efficient and high-selectivity separation of scandium, various rare earth elements and conventional metal impurities in a single precipitation, and obtain scandium oxide with purity higher than 99.9%.The total recovery rate of scandium is more than 85%.The process is simple, without complex saponification process, reducing the generation of salt-containing and ammonia-containing wastewater, and reducing equipment investment and operating cost.

This invention discloses a crystalline oxalate film passivating agent as an alternative to phosphates, comprising, by weight percentage: 15.0%–30.0% sodium oxalate, 10.0%–20.0% potassium titanium oxalate, 5.0%–9.0% nitric acid, 10.0%–15.0% sodium dodecyl sulfate, 3.0%–5.0% complexing agent, 1.0%–4.0% corrosion inhibitor, and the balance being water. This crystalline oxalate passivation film forms a more uniform and dense film compared to phosphate passivation, and is more environmentally friendly.

The present invention relates to the field of pharmaceuticals, and in particular, to a salt form of a pyridazine derivative, a crystal form, a method for preparing same, and use thereof. The present invention provides a salt form of a compound of formula I, and particularly relates to a hydrochloride salt, a hydrobromide salt, a sulfate salt, a phosphate salt, an oxalate salt, a citrate salt, a malate salt, a maleate salt, a fumarate salt, a succinate salt, a malonate salt, a methanesulfonate salt, a benzenesulfonate salt, and a p-toluenesulfonate salt. The present invention further provides an amorphous form and a crystal form of the hydrochloride salt, and particularly relates to crystal form A and crystal form B. The present invention further provides a method for preparing the salt form and the crystal form, and use thereof. The salt form of the compound of formula I and the crystal form of the present invention have significant SOS1 inhibitory activity and a significant anti-tumor cell proliferation effect, have advantageous pharmaceutical properties such as high solubility, good stability, and excellent pharmacokinetics, and are thus suitable for pharmaceutical use.