41 results about "Bromine trifluoride" patented technology

The invention relates to a method for deactivating and recovering boron trifluoride when producing polyisobutenes by means of cationic polymerization of isobutene or hydrocarbon streams containing isobutene in the liquid phase in the presence of boron trifluoride or in the form of a boron trifluoride catalyst complex. The catalyst complex is separated, essentially in the liquid phase, from the reactor discharge. The method comprises the following steps: a) removing from the polymerization reactor at −60 to 020 C., methanol, ethanol or a mixture of methanol and ethanol in such a quantity that an alcohol phase rich in boron trifluoride is formed; b) separating the alcohol phase according to (a) and, (c) optionally recycling the boron trifluoride of the alcohol phase obtained from (b) to the method in a suitable manner.

The invention discloses a preparation method of chlorine trifluoride and belongs to the field of fine chemical engineering. The method comprises the following steps: carrying out a bubbling reaction on liquid-phase chloride and fluorine gas at a certain temperature to obtain a product 1; then charging the product 1, a diluent gas and fluorine gas in a synthesis reactor, and reacting at a certain temperature to obtain a product 2; finally carrying out liquidation, lightweight material discharge and vaporization treatments on the product 2 to obtain chlorine trifluoride. The raw materials in the preparation method are low in price and easily available, thus avoiding the adoption of chlorine with high corrosion and high toxicity, improving safety during production, transportation and storage processes; moreover, the reactor is simple in structure and convenient for material charging and discharging; the reaction conversion rate is high; by-products can be easily separated; and the preparation method can be put into industrial production easily.

The invention discloses a preparation method and device of chlorine trifluoride and belongs to the field of fine chemical engineering. The method comprises the following steps: mixing chlorine gas, fluorine gas and a diluent gas, and then charging the mixed gas in a reactor filled with a catalyst, and reacting at 100-400 DEG C to obtain a product 1; then carrying out cooling, liquidation, lightweight material discharge and vaporization treatments on the product 1 to obtain the chlorine trifluoride. The device comprises a catalytic reactor, a low-temperature collector, a chlorine trifluoride storage tank and a vacuum pump, wherein the catalytic reactor, the low-temperature collector and the chlorine trifluoride storage tank are sequentially connected through pipelines. The process is low in reaction temperature, short in reaction time and high in product yield; the device has the advantages that the length of the reactor is greatly shortened and the production process of chlorine trifluoride is simplified.

The invention discloses a method for preparing graphite fluoride at low temperature. The method comprises the following steps: using ferric fluoride as a catalyst, and performing reaction of crystalline flake graphite and bromine trifluoride at low temperature to generate a graphite intercalation compound; then, performing reaction of potassium manganese hexafluoride and antimony pentafluoride to generate fluorine; and performing reaction of the fluorine generated and the graphite intercalation compound to form the graphite fluoride with high fluorine content. Through purifying treatment by a solvent, the prepared graphite fluoride is high in purity.

The invention discloses a device and a method for purifying bromine trifluoride. The device comprises a vaporizer, an adsorption tower, a rectification purification device, a condensation collecting pipe, a front fraction collecting device, a main fraction collecting device, a rear fraction collecting device, a tail gas recycling system and a vacuum pump. The method includes steps of (i) pretreatment, (ii) adsorption purification and (iii) intermittent rectification purification. The device and the method for purifying the bromine trifluoride by means of adsorption and then intermittent rectification have the advantages that the device and the method are high in phase separation efficiency, light and heavy components can be thoroughly separated from one another, bromine trifluoride products obtained by the aid of the device and the method are high in purity, the purity of the bromine trifluoride products can reach 99.5%, and the device and the method are high in production efficiency.

The invention relates to a method for catalyzed preparation of C5 petroleum resin by utilizing boron trifluoride. The method comprises the steps of rectifying C5 fractions to obtain a polymerization raw material A with a boiling point of 20-70 DEG C, causing enriched materials of styrene, alpha-methyl styrene and vinyl toluene to serve as a polymerization raw material B, evenly mixing the raw material A, the raw material B and saturated varsol according to a mass ratio of 1:(0-0.5):(1-1.5) to obtain ingredients; reacting for 2-5 h at 50-170 DEG C under the effect of a Friedel-Crafts catalyst of a BF3 system, and obtaining polymerization liquid; and obtaining the modified C5 petroleum resin through solvent removal and oligomer removal. The method is simple and convenient in process, the adaptability to complex C5 raw materials is good, and the C5 petroleum resin with a high softening point can be prepared.

The invention provides a preparation method of a cefazolin sodium intermediate TDA (tolylenediamine), which comprises the following steps: by using acetone, acetonitrile, aether, dimethyl carbonate, dichloromethane or chloroform as a solvent, filling 7-ACA (7-aminocephalosporanic acid) and thia-diazole in a weight ratio of 1:1.2 into a reaction vessel, introducing boron trifluoride gas into the reaction vessel, reacting for 1-8 hours while controlling the temperature in the reaction vessel at 0-50 DEG C until the residual 7-ACA is less than 1%, hydrolyzing and crystallizing the reaction product by using sodium carbonate, sodium bicarbonate or ammonia water, carrying out vacuum filtration, washing, and drying to obtain the finished TDA product. The invention does not use boron trifluoride solid complex in the preparation process, and therefore, does not generate waste liquor containing boron trifluoride, thereby preventing the boron trifluoride solid complex from generating pollution and abundant waste liquor to be recovered in the preparation process. Besides, the invention prevents operating personnel from directly contacting the boron trifluoride solid complex in the whole preparation process, thereby lowering the safety risk in the use process.

The invention discloses a detoxifying method which is a method for eliminating unwanted substances from a mixed gas composed of at least chlorine trifluoride and fluorine with a wet scrubber. As a pre-treatment step for the elimination of unwanted substances with the wet scrubber, the method involves a step of adding a halogen gas (X2) (wherein X represents Cl, Br or I) to the mixed gas to cause the reaction between fluorine contained in the mixed gas with the halogen gas (X2) (wherein X represents Cl, Br or I), thereby reducing the content of fluorine in the mixed gas and preventing the generation of perchloryl fluoride (ClO3F) in the wet scrubber.

The invention discloses a method for preparing bromine trifluoride. The method comprises the following steps of: (i) pre-treating a reactor, pre-heating the reactor to 100-120 DEG C, and pumping air out of the reactor till the pressure is about -0.095 MPa; (ii) carrying out synthetic reaction on fluorine gas and bromine vapor at a reaction temperature of 120-160 DEG C so as to obtain a crude product of bromine trifluoride; (iii) removing light-component impurities such as bromine pentafluoride and bromine elementary substance out of the crude product of bromine trifluoride; (iv) purifying bromine trifluoride; and (v) carrying out tail gas treatment. The method for preparing bromine trifluoride disclosed by the invention has the advantages of simple equipment, convenience for operation, safe equipment operation and little environment pollution. Furthermore, the purity of the product can be more than 98%.

The invention discloses a preparation method of boron trifluoride tetrahydrofuran, which is characterized in that the boron trifluoride tetrahydrofuran is prepared by tetrahydrofuran vapour and boron trifluoride gas through complex reaction. The preparation method has the advantages that the boron trifluoride tetrahydrofuran is prepared by the tetrahydrofuran vapour and the boron trifluoride gas through the complex reaction, the cost is low and the reaction temperature is easy to control at a room or higher temperature.

The invention relates to a preparation method of lithium tetrafluoroborate. According to the technical scheme, the preparation method comprises the following steps that 1, under the ambient temperature and pressure, lithium fluoride is added into an esters solvent to obtain a lithium fluoride turbid liquid; 2, boron trifluoride gas is introduced into the lithium fluoride turbid liquid, and reaction is carried out for 1-2 h to obtain a lithium tetrafluoroborate solution; 3, unreacted trace lithium fluoride of the solution obtained in step 2 is filtered through a microporus filter; 4, the liquidafter filtration in step 3 is completed is subjected to concentration and degassing; 5, the solution after concentration is completed in step 4 is subjected to cooling crystallization, filtration anddrying to obtain a lithium tetrafluoroborate finished product. The preparation method of the lithium tetrafluoroborate has the advantages that adopted boron trifluoride is an industrial grade raw material, and is low and easy to obtain; the lithium fluoride forms the turbid liquid in the esters solvent, so that reaction is easily carried out, the operation is simple and convenient, the safety isimproved, and the problems of the risk in reaction and preparation when hydrogen fluoride is adopted as a solvent, excessive amount of free acid of the product, high energy consumption of ultralow-temperature crystallization and the like are avoided.

The invention belongs to a chemical engineering product, a boron trifluoride dimethyl carbonate complex compound, in particular relates to a low temperature preparation method of the boron trifluoride dimethyl carbonate complex compound. The preparation method comprises the following steps: in a gas generating container, using boric acid and anhydrous hydrofluoric acid as raw materials, dehydrating and generating boron trifluoride gas, and sulfur trioxide is used as an dehydrating agent; in a purification container, purifying the boron trifluoride gas generated through concentrated sulphuric acid; in a complexing container, performing a complexing reaction of the purified boron trifluoride gas and the dimethyl carbonate; and in a filter, cooling down and crystallizing the liquid reactant of the complexing reaction, and the solid gathered is the boron trifluoride dimethyl carbonate complex compound. The technical scheme provided by the invention enables the temperature of the gas generating reaction and complexing reaction to be close to the room temperature, decreases energy consumption during production process and is low-carbon and environment friendly; the production process is safer and more controllable; and the boron trifluoride dimethyl carbonate complex compound is a solid white crystal, wherein the content of boron trifluoride is 40-43 percent in weight and the property of the boron trifluoride is stable.

The invention relates to a preparation method for pentadiene petroleum resin. The method comprises the following step of: synthesizing pentadiene petroleum resin by taking a pentadiene concentrate as a raw material and taking a boron trifluoride complex as a catalyst, wherein the catalyst consists of boron trifluoride and a complexing agent; the complexing agent consists of C1-C10 alcohol and benzene alkyl ether C6H5-OR; in the formula, R is methyl, ethyl or butyl; the molar ratio of the C1-C10 alcohol to the benzene alkyl ether is 2-8; the molar ratio of the boron triflouride to the complexing agent is 0.5-0.8; and a preparation method for the boron triflouride complex serving as the catalyst comprises the following steps of: adding the C1-C10 alcohol and the benzene alkyl ether into a reactor; cooling the materials in the reactor to 0 DEG C to 30 DEG C below zero while stirring; introducing boron triflouride gas into a container within 2-6 hours; and controlling the reaction temperature at -15+/-5 DEG C. The color phase (Fe-Co) of the pentadiene petroleum resin produced with the method is less than or equal to 5, and the softening point is 89 DEG C.

The invention discloses a method for directly preparing tetrafluoromethane by a fluorocarbon direct synthesis process using bromine trifluoride as an explosion suppressant, is a process for preparing high-purity tetrafluoromethane by the reaction of 60-mesh petroleum coke and F2 under a condition that fluorinated halogen is used as an explosion suppressant, wherein the ratio of the added amount of the explosion suppressant to the volume of fluoride is 1: 20; the added amount of the petroleum coke is 500-550 kg every time, and the added amount of the F2 is 10-12 L/min; and the high-purity tetrafluoromethane is obtained at last after port-treatment. The preparation method disclosed by the invention is reasonable in process and simple in production, as well as is the most simple and ideal technology for preparing tetrafluoromethane.

Provided is a method for treating the inner surface of a chlorine trifluoride supply path that enables reliable suppression of drops in the concentration of ClF3 in a reaction chamber during treatment work. A gas supply path (2) and a gas discharge path (3) are integrally connected to a treatment chamber (1) of a treatment device in which chlorine trifluoride is used as an etching gas. Chlorine trifluoride gas with a concentration equal to or greater than the concentration of the chlorine trifluoride gas supplied during etching treatment operation is allowed to act on the inner surfaces of at least the treatment chamber (1) and the gas supply path (2) from among the treatment chamber (1), the gas supply path (2), and the gas discharge path (3), thus coating the inner surfaces of at least the treatment chamber (1) and the gas supply path (2) with a fluoride film.

The invention belongs to the field of chemical technologies, and particularly relates to a production technological method for a boron trifluoride acetonitrile complex solid mixture. The method aims at solving the problems that the existing production process flow is relatively simple, the yield of finished products is relatively small, the resource waste is easily caused, in addition, the waste gas treatment link and the solid recovery link do not exist in the production process, the pollution to the environment is caused, the environmental protection purpose is not achieved, and the like. According to the method, boric acid solid and fuming sulfuric acid liquid are uniformly mixed, a gas-making reaction tower is preheated for 10 minutes through a heater, the temperature is controlled tobe within 200-300 DEG C, mixed acid of the boric acid solid and the fuming sulfuric acid liquid is added into the gas-making reaction tower from the top, and meanwhile, hydrogen fluoride gas is compressed and then is added into the gas making reaction tower from the bottom. The method has the advantages that the yield of the finished products is increased, the resource waste is avoided, the wastegas treatment link and the solid recovery link are increased, the pollution to the environment is avoided, and the environmental protection purpose is achieved.

The present invention relates to the preparation of commercial grade BF from boron trifluoride hydrate waste liquor containing organic impurities ₃ and H ₂ SO ₄ . The method mainly consists in reacting the waste liquid with oleum, recovering the boron trifluoride gas released thereby, treating with hydrogen peroxide and blowing off sulfuric acid by-products with air.

An object of the present invention is to provide a novel substance that has a high reactivity as a fluorinating agent, is effectively used in various fluorination reactions, and is safely handled even in air. As the solution for achieving this object, the present invention provides a complex obtained by reacting bromine trifluoride with at least one metal halide selected from the group consisting of halogenated metals and halogenated hydrogen metals in a nonpolar solvent. This complex serves as a fluorinating agent that provides excellent fluorination performance and that is stable in air.

The invention discloses a method for the co-production of propylene glycol during the production of boron trifluoride. Boric acid, hydrofluoric acid, water and propylene oxide are used as raw materials, and the method comprises the following steps of hydrolyzing the propylene oxide in the presence of boron trifluoride, performing ring opening reaction on the propylene oxide to generate propylene glycol, and preparing boron trifluoride at the same time. According to the method, the adoption of sulfuric acid as a reaction raw material is avoided, so that corrosion to production equipment is reduced, and the environmental pollution is avoided; the prepared boron trifluoride does not contain impurities such as HF, SO3 and SO2, so that the purity of the boron trifluoride is obviously improved; the problem of existence of waste sulfuric acid difficult to treat in a byproduct produced by the production of boron trifluoride is solved, and the technical problem of serious corrosion to the production equipment is solved; propylene glycol is co-produced during the production of the boron trifluoride, and can be used for production after being rectified, so that the production cost is greatly lowered, and the utilization rate of the byproduct is increased.

The invention discloses a bromine trifluoride and load gas batching method and device, and the device comprises a bromine trifluoride feeding container and a load gas feeding container which are communicated with a radioactive device through a pipeline and a regulation and control mechanism; the regulation and control mechanism can be a combination of a bromine trifluoride flow metering control device and a load gas flow metering controller device; and the device can also be a combination of a mixed gas flow metering controller device, a mixed batching container and a valve. According to different adjusting mechanisms, the batching method comprises the following two modes: respectively controlling and metering the flow rates of the two material flows, then mixing and supplying the material flows into radioactive equipment, and firstly mixing the two gas flows in proportion, then metering the flow rate of the mixed gas and supplying the mixed gas into the radioactive equipment. The device can be used for burdening of bromine trifluoride and load gas flow and proportion in a large range, and the burdening gas flow and proportion can be controlled accurately; and the method and the device are simple, convenient and high in reliability.