37 results about "Fluoride products" patented technology

The invention discloses a hamartite smelting separation process. First optimal slag or/and second optimal slag mainly containing cerium (IV), thorium (IV) and fluorine, obtained by oxidative roasted salt acid leaching of hamartite, is/are used as raw materials, and extraction and separation of rare earth are performed. The process comprises the following steps of: 1) leaching the first optimal slag by using sulfuric acid to obtain sulfuric acid-rare earth solution and filter residue; or leaching the second optimal slag obtained by alkali conversion-hydrochloric acid dissolution of the first optimal slag by using sulfuric acid to obtain sulfuric acid-rare earth solution and filter residue; or leaching the mixed slag of the first optimal slag and the second optimal slag by using sulfuric acid to obtain sulfuric acid-rare earth solution and filter residue; 2) performing extraction separation on the sulfuric acid-rare earth solution obtained in the step 1) to obtain a rare earth compound,fluorine washing liquor, a pure cerium product and a thorium product; and 3) synthesizing a fluoride product by using the fluorine-containing alkali wastewater obtained by alkali conversion in the step 1) and the fluorine washing liquor obtained by the extraction separation in the step 2). The process has the advantages that: the recovery rate of the rare earth is obviously improved, the fluorineand the thorium (IV) are effectively reclaimed in a product form, the high-purity cerium product is obtained, reclamation of the rare earth and associated resources is realized, and the additional values of the resources are improved; and the process flow is simple, the consumption of acid and alkali is low, the production cost is low, and the process is environmentally-friendly.

The invention discloses an industrial synthesis method for graphite fluoride. Fluorine gas or the mixture of fluorine gas and inert gas is led into a specific reaction container filled with graphite at certain flow speed and pressure; and then graphite fluoride with various specifications of more than 50 percent is obtained by controlling reaction temperature, reaction pressure and reaction speed. Compared with methods specified in other relevant patents, the method has simple operation and can carry out industrial production safely. The obtained graphite fluoride products are mainly applied to the electrode materials of novel high-energy lithium ion battery and solid lubricant material.

The invention discloses a fluorination electrolysis reactor, which comprises a reaction kettle with an inner chamber, a pair of negative electrode and positive electrode leading-out terminals, a plurality of negative and positive plates, a mixer, a rotating shaft and a motor. The positive plates and negative plates are all flat rectangles, and are alternately arranged at preset interval into electrode stacks; the mixer is connected to the motor through the rotating shaft; the electrode stacks are arranged around the mixer into a ring; and the gap between the electrode plates generally orient the mixer. Adjacent electrode stacks can be arranged in choking connection to prevent flow of the electrolyte along the gaps between the stacks. The simple equipment employs a compulsory internal recycle mode; electrolysis products are easily controlled and derived in an electrolytic reaction process, so as to facilitate enrichment discharge of the reaction products; and the reactor effectively increases product yield, expands the varieties of fluoride products from the electrolytic reaction and the usage scope of the electrolytic tank.

The invention discloses a method for producing rare earth fluoride from bastnasite. The method comprises the following steps that 1, bastnasite is burnt, decarburized and oxidized; 2, the burnt, decarburized and oxidized bastnasite is added into a hydrochloric acid water solution with a complexing agent for acid leaching; 3, after acid leaching, a flocculating agent is added for solid-liquid separation, a fluorine-containing rare earth material and leached residue are obtained, and the leached residue is washed and recycled; 4, the fluorine-containing rare earth material is heated to be boiled and kept warm, standing is carried out after the reaction is finished, solid-liquid separation is carried out after clarification, and a fluorinated rare earth solid phase and a rare earth chloride clear liquid phase are obtained; and 5, the fluorinated rare earth solid phase is washed till pH is 6-7, heating and dehydration are carried out after filtration, and therefore rare earth fluoride is obtained. Rare earth ore is decomposed, the rare earth fluoride product is obtained, the leaching rate of rare earth in the rare earth ore is larger than 94%, and the utilization rate of fluorine resources in rare earth ore is larger than 91%. Fluorine resources in rare earth ore concentrate are sufficiently utilized, rare earth fluoride is produced, and a remarkable effect is obtained in the aspects of cost, energy saving and consumption reducing, environmental protection and the like.

The invention provides a perfluoropolyether end group fluorination method which comprises the following steps: (1) irradiating mixed gas of fluorine gas and inert gas by using ultraviolet light, and activating; and (2) introducing the activated mixed gas into a reaction kettle filled with perfluoropolyether acyl fluoride, and reacting to obtain the end group fluorinated perfluoropolyether. According to the method disclosed by the invention, the fluorination reaction can be carried out at normal temperature, the obtained perfluoropolyether is easy to post-treat, the low-molecular-weight perfluoropolyether acyl fluoride product is less in loss, and the structure, the average molecular weight, the viscosity and the like of the fluorinated product are not changed.

The invention belongs to the technical field of polysilicon production, in particular to a method for comprehensively utilizing a chemical byproduct single cryolite during production of polysilicon. The method comprises the following steps of: reacting the single cryolite with sodium hydroxide solution to generate hydrogen and sodium aluminate slurry; and reacting the sodium aluminate slurry withhydrofluoric acid to prepare cryolite for aluminum, wherein the byproduct, namely hydrogen in the reaction process is purified and recovered to serve as a byproduct; and mother liquid is used for producing other fluoride products, or being neutralized by adding lime and then being discharged. The byproduct, namely single cryolite, of polysilicon is used for producing cryolite for aluminum, so rawmaterials are readily available, cost is low and the utilization ratio of the raw materials is high; the produced cryolite for aluminum has low impurity content and meets national standard; and wasteis changed into treasure, which accords with production ideas of comprehensive utilization of resources, energy conservation and environmental protection.

The invention relates to a perfluorooctanoic acid fluoride preparation method. According to the invention, fluorine gas is diluted by inert gas and is subjected to caprylyl chloride under low temperature condition to prepare perfluorooctanoic acid fluoride. The technical means such as inert gas dilution, reaction temperature reduction, stirring or filling material increasing can be carried out so that the reaction of fluorine gas and caprylyl chloride is milder and more uniform, control is easy, yield of perfluorooctanoic acid fluoride is greatly increased, usage of an electrolytic tank metal anode is avoided, and the generation of a solid waste material is basically eliminated. Direct reaction of fluorine gas and caprylyl chloride can avoid the energy waste, increases perfluorooctanoic acid fluoride yield, reduces the generation of by products such as low fluorine carbon due to a scission reaction of long-chain carbon atoms, quality of the perfluorooctanoic acid fluoride product is guaranteed, and the method has great meaning for perfluorocapylic acid production enterprises.

The invention discloses a rare earth fluoride molten salt electrolysis slag treatment method. The rare earth fluoride molten salt electrolysis slag treatment method comprises the following steps thatball milling is carried out on rare earth molten salt electrolytic slag to a certain particle size; the electrolytic slag obtained after ball milling is subjected to magnetic separation, and magneticseparation tailings and magnetic separation concentrates are obtained; the magnetic separation tailings and concentrated sulfuric acid are mixed to make a heating reaction, and curing residues and HFgas (preparing an HF solution with water absorption) are obtained; the sulfuric acid curing residues are leached with water, and water leaching liquid is obtained; and the water leaching liquid obtained in the fourth step is subjected to fluoride precipitation with the HF solution obtained in the step three, and a rare earth fluoride product is obtained after liquid-solid separation is carried. The rare earth fluoride molten salt electrolysis slag treatment method is environment-friendly and economical, and solves the problem about separation of molten salt electrolysis slag rare earth and fluorine; meanwhile, the fluorine is finally recycled into a reaction system to react with rare earth to form precipitate, and green production and high-efficiency recovery of rare earth and iron from rare earth molten salt electrolysis slag are realized.

The invention belongs to the field of fluorine chemical engineering and particularly relates to a controllable polymerization method and device of hexafluoropropene trimer. The hexafluoropropene trimer is made by gaseous reaction of hexafluoropropene under the catalysis of a supported ionic fluoride; the reaction temperature is 260-320 DEG C; contact time is 0.1-30 s; the ionic fluoride supportingcapacity is 10-20%; a supporter is activated carbon, aluminum trioxide, silicon dioxide or magnesium oxide; the ionic fluoride is AgF, NaF, KF, RbF or CsF. The novel route herein is suitable for existing manufacturers of fluoride products and the advantages of long-term reusability, low cost and significant economic benefit.

The invention relates to a process for preparing 18F-FLT and a self-contained reagent kit, relating to the preparation of positron medicine and a reagent kit thereof and belonging to the technical field of radiopharmaceuticals and nuclear medicine. The process comprises the following steps of: a, catching 18F- generated by an accelerator by using a QMA column, then leaching the 18F- on the QMA column into a reaction tube by using quaternary ammonium salt TEABC (Triethyl Ammonium Bicarbonate) or a TBAHCO3 (Tetrabutylammonium Hydrogen Carbonate) solution; b, dehydrating the obtained 18F- after being leached in the step a; c, dissolving a precursor MTR-Nos-Boc-LT of 18F-FLT through a protic solvent, and adding into the 18F- obtained in the step b to carry out a nucleophilic fluorination reaction; d, hysrolyzing a nucleophilic fluoride product obtained in the step c through a hydrochloric acid solution, and neutralizing through an alkaline buffer solution; and e, edulcorating a neutralized liquid obtained in the step d to obtain a product 18F-FLT. Compared with the traditional synthesis technology, the process provided by the invention is a 18F-FLT synthesis technology with high efficiency, high stability and high purity, and can be used for making novel 18F-FLT and other positron medicine synthesis modules.

The invention discloses a rare earth fluoride, and the purpose of obtaining a high-quality rare earth fluoride can be achieved by using a distillation purification method to reduce non rare earth impurities in a commercially available rare earth fluoride. A production method of the rare earth fluoride is simple, and the rare earth fluoride product quality is stable. The development and application of high pure rare earth metals and alloys and rare earth fluoride function materials can be facilitated.

The invention belongs to the field of fluorine chemical industry, and concretely relates to a method and a device for controllable polymerization of a hexafluoropropylene dimer. The hexafluoropropylene dimer is obtained by a gas phase reaction of hexafluoropropylene under the catalysis of a supported ionic fluoride; the reaction temperature is 150-220 DEG C; the contact time is 0.1-30 s; the loadcapacity of the ionic fluoride is 10-20%; the carrier is activated carbon, alumina, silica or magnesia; and the ionic fluoride is AgF, NaF, KF, RbF Or CsF. The above new route is suitable for existingenterprises for producing fluoride products, and realizes the characteristics of long-term recycling, low cost and remarkable economic benefit.

The invention relates to a dephosphorization method of aluminum fluoride solution, P2O5 in the aluminum fluoride solution is reacted with a dephosphorization agent to prepare a product, and the method comprises the following steps: I. the aluminum fluoride solution containing phosphorus is selected; II. the aluminum fluoride solution containing the phosphorus is put in a reaction tank, steam is introduced, and the temperature is increased; III. slurry with the weight ratio of 1:1 is prepared by the dephosphorization agent and put in the reaction tank, the reaction time is 0.5h-1h, and mixture is generated by the reaction; and IV. the mixture is filtered, sediments are separated, and the qualified product is obtained; the dephosphorization method adopts the technical proposal of adopting P2O5 in the aluminum fluoride solution to be reacted with Fe in the dephosphorization agent so as to further prepare aluminum fluoride or cryolite and other fluoride products, thereby overcoming the shortcomings of single raw material, long technology flow, complicated process, strict requirements on phosphorus content in the fluosilicic acid raw material, and the like of the existing preparation method of the aluminum fluoride, the cryolite and other fluoride products. The dephosphorization method is applicable to the preparation of inorganic fluorides and especially applicable to the prepration of the aluminum fluoride or the cryolite and other fluoride products with the need of the treatment of the fluosilicic acid.

The invention discloses an automatic rare earth oxide fluorination transformation system. The automatic rare earth oxide fluorination transformation system comprises a feeding area, a material preparation area, a fluorination area, a cooling area and a discharging area which are arranged in sequence, wherein the feeding area, the material preparation area, the fluorination area, the cooling area and the discharging area are gradually fed through an operation mechanism, the fluorination area is provided with an air supply system, a temperature control system, a hydrofluoric acid recovery systemand a pressure adjusting system, and the operation mechanism, the air supply system, the temperature control system, the hydrofluoric acid recovery system and the pressure adjusting system are in communication connection with a program control computer host. Through the system, the whole fluorination process can be carried out in a closed environment; therefore, a fluoride product with stable quality and a good working environment are ensured; the system can effectively recover byproduct hydrofluoric acid so as to prevent the hydrofluoric acid from being discharged into the air to pollute theenvironment, the recovered byproduct can be reutilized, automatic control can be realized through the system, the whole fluorination efficiency is improved, and the labor cost is saved.