41 results about "Bromine trifluoride" patented technology

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 relates to a catalyst applied to the manufacturing technique of cephalo-type products, comprising the steps of firstly adding sulphuric acid or fuming acid in a reaction kettle, and then adding boron anhydrous or boric acid, infusing sulphur trioxide in the reaction kettle, and finally infusing hydrogen fluoride in the reaction kettle, the contents of the components are respectively2-5 parts of sulphuric acid or 3-5 parts of fuming acid, 0.4-1.5 parts of boron anhydrous or 0.4-1.5 parts of boric acid, 2-4 parts of sulphur trioxide and 2-7 parts of hydrogen fluoride. For the production of boron trifluoride-dimethyl carbonate complex, the raw materials comprise 1.25-1.5 parts of boron trifluoride and 5-10 parts of dimethyl carbonate, and solid boron-trifluoride dimethyl carbonate complex is separated by centrifuging and then packed into a transportation bag, and finally returning the mother liquor to a complexing kettle to carry out complexation again. For the production of boron trifluoride-acetonitrile complex, the raw materials comprise 0.8-1 part of boron trifluoride and 4-5 parts of acetonitrile, and the raw materials are directly put into a package bucket. The invention has the advantages of low reaction temperature, moderate reaction and high safety. The invention does not generate waste slag and waste liquor, avoids environmental pollution and saves energysource. The product of the invention is stable and has high yield. The method is simply operated and suitable for mass production.

The invention relates to a method for preparing boron-10 acid with boron-10 trifluoride. The method includes following steps: carrying out a reaction between the boron-10 trifluoride and calcium methoxide to obtain trimethyl borate-10 with absolute methanol being a solvent; carrying out a solid-liquid separation process to a reaction product; performing hydrolysis to a liquid mixture to obtain the boron-10 acid. The method is divided into two processes: an esterification process and a hydrolysis process, wherein methanol is used as the solvent and a reaction is carried out between the boron-10 trifluoride and the calcium methoxide to obtain the mixture composed of the trimethyl borate-10 and the methanol in the esterification process. The reaction product is subjected to a distillation process with a distillate being subjected to hydrolysis to obtain a mixed solution composed of boric acid, methanol and water. A condensation process and a crystallization process to obtain the boron-10 acid. A solid by-product obtained after the distillation is single in content, wherein a main component in the solid by-product is calcium fluoride. A yield of the boron-10 acid is more than 95.2% through the method and a purity of the boron-10 acid is more than 99.7% after the boron-10 acid being detected through a detection method in GBT12684-2006.

The invention relates to a method for preparing boron-10 acid from boron trifluoride-10. The method comprises the following steps: by taking a boron trifluoride-10 gas or a boron trifluoride-10 low-carbon alcohol complex as a raw material, reacting with lithium hydroxide to generate boron-10 acid in a water medium, filtering, performing ion exchange and crystallizing a mixed liquid so as to separate boron-10 solid. The method is performed in water, so that the loss of yield caused by the fact that a middle product boric acid ester generated in a conventional esterification hydrolysis method is hydrolyzed as the system contains water is avoided. The treatment process is simple, industrialization is relatively easy to achieve, the boric acid yield and the purity are relatively high, the boric acid yield is greater than 97%, and the purity is greater than 99%.