68results about "Boron halides" patented technology

An isotopically-enriched, boron-containing compound comprising two or more boron atoms and at least one fluorine atom, wherein at least one of the boron atoms contains a desired isotope of boron in a concentration or ratio greater than a natural abundance concentration or ratio thereof. The compound may have a chemical formula of B₂F₄. Synthesis methods for such compounds, and ion implantation methods using such compounds, are described, as well as storage and dispensing vessels in which the isotopically-enriched, boron-containing compound is advantageously contained for subsequent dispensing use.

Disclosed are a fluidized bed without a sieve plate and a method for preparing boron trichloride using same. The method comprises: filling the bed body (1) of a fluidized bed without a sieve plate with a powder raw material, i.e. an alkaline earth metal boride, via a raw material supplying device (4); opening a carrier gas source (2), feeding the carrier gas into the bed body (1) of the fluidized bed without a sieve plate, so that the powder raw material i.e. the alkaline earth metal boride is in a fluidized state in the bed body (1) of the fluidized bed without a sieve plate; opening a heating device (5) to heat the bed body (1), feeding a reaction gas i.e. anhydrous hydrogen chloride when the temperature reaches the specified temperature; and after the reaction reaches the specified time, opening and starting a separating device (7), so as to obtain the necessary boron trichloride.

The present invention relates, in general, to the purification of boron trichloride (BCl₃). More particularly, the invention relates to a process for minimizing silicon tetrachloride (SiCl₄) formation in BCl₃ production and/or the removal of SiCl₄ in BCl₃ product stream by preventing/minimizing the silicon source in the reaction chambers. In addition, a hydride material may be used to convert any SiCl₄ present to SiH₄ which is easier to remove. Lastly freeze separation would replace fractional distillation to remove SiCl₄ from BCl₃ that has been partially purified to remove light boilers.

The reaction of halo-boron compounds (B—X compounds, compounds having one or more boron-halogen bonds) with silanes provides boranes (B—H compounds, compounds having one or more B—H bonds) and halosilanes. Inorganic hydrides, such as surface-bound silane hydrides (Si—H) react with B—X compounds to form B—H compounds and surface-bound halosilanes. The surface bound halosilanes are converted back to surface-bound silanes electrochemically. Halo-boron compounds react with stannanes (tin compounds having a Sn—H bond) to form boranes and halostannanes (tin compounds having a Sn—X bond). The halostannanes are converted back to stannanes electrochemically or by the thermolysis of Sn-formate compounds. When the halo-boron compound is BCl₃, the B—H compound is B₂H₆, and where the reducing potential is provided electrochemically or by the thermolysis of formate.

A production method of high purity silver tetrafluoroborate, capable of producing silver tetrafluoroborate (AgBF₄) at purity higher than the conventional, without using an organic solvent. The production method of the present invention is characterized in that the method comprises the step of: reacting silver fluoride with boron trifluoride in the presence of anhydrous hydrofluoric acid. Boron trifluoride is delivered into a solution obtained by dissolving or suspending silver fluoride in an anhydrous hydrofluoric acid solution.

The invention provides processes for the recovery of a catalyst which are to be applied to the reactions wherein boron trifluoride or a complex thereof is used as the catalyst, that is, (I) a process for the recovery of a catalyst which comprises using as the reaction solvent a solvent containing a hydrofluorocarbon compound and/or an oxygenic hydrofluorocarbon compound and, after the completion of the reaction, separating the reaction solvent from the reaction mixture; and (II) a process for the recovery of a catalyst which comprises extracting boron trifluoride or a complex thereof from the reaction mixture after the completion of the reaction by using a hydrofluorocarbon compound and/or an oxygenic hydrofluorocarbon compound as the extracting solvent. According to the processes, boron trifluoride or complexes thereof used as catalyst can be easily separated from the reaction mixtures and re-used.

The invention discloses a purification method for boron trichloride, which includes the steps of: S1) decomposition section: feeding a liquid-phase boron trichloride crude product into a carbonyl chloride decomposer, wherein carbonyl chloride impurities in the boron trichloride are subjected to photo-decomposition under ultraviolet irradiation catalysis in the decomposer, pressure in the decomposer being 4.5-5.5 bar and reaction temperature being 30-40 DEG C, in addition, back-blowing is carried out at the bottom of the decomposer with inert gas with pressure being 5.5-6.5 bar; S2) rectification section: after the treatment in the S1), the boron trichloride is compressed into a two-stage rectification section under effect of pressure difference from the bottom of the carbonyl chloride decomposer to successively remove the heavy components and the light components from the boron trichloride crude product to obtain a boron trichloride product, wherein in the first rectification stage, operation pressure is 3-3.5 bar and operation temperature is 43-53 DEG C, and in the second rectification stage, operation pressure is 2.6-3.1 bar and operation temperature is 6-50 DEG C. Compared withthe prior art, the method can increase the purity of purified boron trichloride and reduce energy consumption.

The invention provides a method and device for preparing high-purity boron tribromide (BBr3) from boron carbide used as a raw material. The method comprises the following steps: vaporizing industrial grade liquid bromine through a vaporization kettle, introducing the bromine vapor into a drying chamber under the guidance action of a trace of nitrogen gas, removing moisture by means of anhydrous calcium chloride, feeding into a reaction furnace, and reacting with boron carbide particles at a reaction temperature of 650-850 DEG C to obtain boron tribromide containing impurities, dust and colors; performing ash removal on the boron tribromide through an ash blocker, removing residual bromine and iron ions by means of naphthol in a distillation kettle, and distilling to obtain white boron tribromide; and rectifying through a rectification tower, and removing high boiling point and low boiling point impurities to obtain a boron tribromide product of which the purity is greater than 5N, wherein the boron tribromide rectifying temperature is 120 DEG C, and the reflux ratio is 2-3.The high-purity boron tribromide preparation device provided by the invention is composed of the vaporization kettle, a dryer, the reaction furnace, the ash blocker, a condenser, the distillation kettle (for iron and bromine removal), the rectification tower and a finished product kettle. The purity of the boron tribromide produced by the invention can be up to 5N or above; and the method and device are low in cost and high in efficiency, and can realize industrial continuous production.

The invention discloses a method for efficiently preparing borohydride anion [RnH(4-n)B]<->, lewis acid RnX3-nB is taken as a catalyst, hydrogen containing silane is taken as a reducing agent, and various halogenated boron anionic ammonium salts [R'4N]<+>[RnX(4-n)B]<-> are reduced to corresponding borohydride anion ammonium salts [R'4N]<+>[RnH(4-n)B]<->. The method not only can prepare BH4<-> anionic salt and triphenyl borohydride ammonium salt [Ph3HB]<->, but also can synthesize various other types of borohydride anions [RnH(4-n)B]<->, the applicability is wide, and the synthesis method is simple and efficient. The method provides a novel way for the synthesis of the borohydride anion [RnH(4-n)B]<->.

The invention discloses a preparation method of electronic-grade boron trichloride, wherein the preparation method comprises the steps: chlorine and hydrogen are introduced into a photocatalytic reactor from the bottom, phosgene in a reaction product of a fluidized bed reactor is decomposed into carbon monoxide and chlorine under illumination, the chlorine and hydrogen are subjected to a reactionunder ultraviolet irradiation to generate hydrogen chloride, and the hydrogen chloride is extracted from the top of the photocatalytic reactor; hydrogen chloride is subjected to heat exchange and vaporization treatment and then subjected to a reaction with boron powder in the fluidized bed reactor, and a reaction product is extracted from the top of the fluidized bed reactor, then enters a light component removal tower reboiler for heat exchange and next enters a photocatalytic reactor; a boron trichloride crude product extracted from the bottom of the photocatalytic reactor enters the light component removal tower, a product extracted from the top of the light component removal tower enters a heavy component removal tower reboiler for heat exchange, and then enters a fractional condenserfor condensation and cooling, and a liquid phase finally flows back to the light component removal tower; a material of the tower kettle of the light component removal tower enters a heavy component removal tower, and a 6N boron trichloride product is extracted after the tower top of the heavy component removal tower is condensed by a condenser. The method is simple, reliable, low in energy consumption, easy to implement and convenient for industrial production.

The invention discloses a boron trichloride purification device, and relates to the technical field of boron trichloride. The device comprises a raw material flow convergence channel, a boron trichloride adsorption system, a filter, a rectifying tower, a liquefier, a finished product storage mechanism, a recovery storage mechanism, a recovery filling mechanism, a finished product filling mechanism, a tail gas removal system, a hot nitrogen access port and a non-condensable steam discharge mechanism. Through cooperation of all accessories, boron trichloride can be well purified, high-purity boron trichloride is obtained, unqualified boron trichloride can be automatically recycled, the production cost is reduced, one-time forming is achieved in the purification process, continuity of the purification technology is guaranteed, boron trichloride is prevented from being affected by external impurities, the purity of boron trichloride is guaranteed, and the method is easy to operate, high in efficiency and suitable for large-scale popularization.

The present invention is directed to an organic polymerizable composition for producing a molded polymeric article. The composition includes a mold release agent of ionic fluoride and/or ionic fluoride precursor present in an amount sufficient to effect at least partial demolding of the polymeric article from a mold. Molded articles also are provided.

The invention discloses a fluorination device for treating neodymium iron boron waste powder, and belongs to the technical field of neodymium iron boron waste treatment. The fluorination device comprises a fluorine gas generating device, and a top outlet of the fluorine gas generating device is connected with a corrugated pipe. The right side wall of the fluorine gas generating device is connectedwith a reaction pipe through a screw, and the top of the left end of the reaction pipe is connected with a gas inlet. The gas inlet is connected with the bottom of the right end of the corrugated pipe, and spoilers are evenly mounted on the left side wall of an inner cavity of the reaction pipe. The upper side of the middle of the reaction pipe is connected with a charging opening, and a protection cover is mounted in the middle of the upper side wall of the inner cavity of the reaction pipe. The protection cover is connected with the bottom of the charging opening, and the bottom of the reaction pipe is connected with an arc-shaped reaction bin. According to the fluorination device for treating the neodymium iron boron waste powder, by arranging the spoilers, the flow velocity of fluorine gas can be reduced; by arranging the protection cover, gas flow is prevented from blowing away the raw material powder; and by arranging a gas pressure inductor and a PLC, the intelligent control degree is higher.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a method and device for recovering boron trifluoride in wastewater containing boron trifluoride. The recovery method provided by the invention comprises the following steps: mixing wastewater containing boron trifluoride with strong base to carry out acid-base neutralization reaction to obtain a neutralization reaction product, wherein the boron trifluoride contained in the wastewater is hydrolyzed into fluoboric acid and boric acid; and mixing the neutralization reaction product with fuming sulfuric acid, and carrying out a replacement reaction to obtain boron trifluoride gas. According to the method, by adding the strong base into the boron trifluoride-containing wastewater and carrying out acid-base neutralization reaction on the strong base and fluoboric acid in the wastewater, sodium fluoborate is obtained; and sodium fluoborate, boric acid and fuming sulfuric acid react to obtain the boron trifluoride gas. According to the method, boron trifluoride in the wastewater is recycled by utilizing a simple chemical reaction. The recovery method provided by the invention is simple and easy to implement; the influence of boron trifluoride on the environment and an existing wastewater treatment system is reduced; and the waste of resources is reduced.

The invention discloses a method for comprehensively recycling valuable components in paigeite, and belongs to the field of metallurgy. The method adopts microwave heating, tunnel kiln smelting and chloride separation. According to the method, iron, boron and magnesium elements in the paigeite can be effectively separated, the grade and yield of iron and boron can be improved, high-magnesium tailings can be recycled, utilization of the composite paigeite is promoted, the situation of iron mine, boron mine and magnesium mine resource shortage can be effectively relieved, the ecological featureof resource and energy can be taken into consideration, and comprehensive utilization of paigeite resource can be realized. The method has the advantages of simple process, low production cost, energyconservation, emission reduction and the like.

The invention relates to a hydrogenated isotopically enriched boron trifluoride (BF3) dopant source gas composition. The composition contains (i) boron trifluoride isotopically enriched above naturalabundance in boron of atomic mass 11 (UB), and (ii) hydrogen in an amount of from 2 to 6.99 vol.%, based on total volume of boron trifluoride and hydrogen in the composition. Also described are methods of use of such dopant source gas composition, and associated apparatus therefor.