37 results about "Iodine pentafluoride" patented technology

The invention discloses a method of preparing iodine pentafluoride by chemical reaction in a negative pressure container with iodine and fluorine gas as raw materials, and iodine pentafluoride as the carrier. The method includes the following steps: firstly, the iodine is put in a reactor with iodine pentafluoride liquid; the reactor is sealed and evacuated, with pressure of -0.08 to -0.06MPa; cooling water is fed to cool the product. Then fluorine gas is fed into the reactor to have chemical reaction with the iodine, so as to form the three-phase reaction of gas, liquid and solid; the pressure in the reactor is controlled to be less than -0.02MPa and the temperature is controlled to be lower than 85 DEG C. The invention has the advantages of simple process, low reaction temperature, easiness in being controlled, stable and reliable production quality, and high yield.

The invention discloses a preparation method of iodine pentafluoride, which has the advantages of continuous reaction, high yield, mild and complete reaction and very light pollution level and comprises the following steps: placing solid iodine above liquid iodine pentafluoride or an iodine pentafluoride solution of iodine, introducing fluorine gas in the liquid iodine pentafluoride or the iodine pentafluoride solution of iodine, and reacting solid iodine and fluorine gas to generate iodine pentafluoride which flows in the liquid iodine pentafluoride or the iodine pentafluoride solution of iodine after dissolving the iodine partially. The invention also discloses reaction equipment dedicated for the method.

The invention discloses a method for continuously preparing iodine pentafluoride. According to the method, a serial process flow of a multistage tower type reactor is adopted; according to process requirement, the tower number can be 1-N grades, wherein N is more than or equal to 3; in the atmosphere containing sulfuryl fluoride (RfSO2F), an iodine pentafluoride solution of iodine and fluoride gas or mixed gas of fluoride and nitrogen respectively enter a multistage reaction tower from two ends, reversely flow and generate a reaction. The method has the advantages that the reaction temperature is controllable, higher safety is ensured and the phenomenon that the iodine is excessively fluoridized at high temperature to generate IF7 is avoided; two iodine dissolving tanks are alternatively used so as to facilitate the continuous atomization; the sulfuryl fluoride atmosphere facilitates the operation of a gas-liquid reaction and is remarkably superior to the hydrogen fluoride existing atmosphere introduced in other patents, so that the purification of products is facilitated; and unreacted fluoride gas in tail gas can be adsorbed by solid salts or alkali and then be recycled. The process equipment and parts are made of general steel; and pitting-free chemical nickel-plating treatment and fluorine gas passivation treatment are used in sequence so as to effectively reduce the investment cost and facilitate the industrialization.

The technical scheme of the invention is to provide a process method for purifying iodine pentafluoride. The process method comprises the following steps of: (i) evacuating an evaporator until the pressure is between -0.08MPa and -0.10MPa; (ii) adding an iodine pentafluoride raw material into the evaporator; (iii) heating the evaporator, and controlling the temperature of the evaporator to be 30-60 DEG C to ensure that light component impurities such as N2, O2, HF and the like in the iodine pentafluoride are gasified and separated out; (iv) controlling the temperature of the evaporator to be 90-130 DEG C to ensure that the iodine pentafluoride in the evaporator is gasified and the gasified iodine pentafluoride enters a condenser, and controlling the temperature of the condenser to be 60-80 DEG C to ensure that the iodine pentafluoride gas is condensed and liquefied; (v) removing deposited substances such as KF, FeF2 and other heavy components in an iodine pentafluoride crude product. The process method provided by the invention is simple in equipment, convenient in operation and safe in equipment running, the content of the impurities in the iodine pentafluoride is effectively reduced, and the product purity reaches more than 99.5%.

The invention discloses a preparation method and production device of iodine pentafluoride. The preparation method comprises following steps: (1) adding iodine pentafluoride and molten iodine respectively into a first reaction kettle and a second reaction kettle to form a mixed system; (2) feeding a mixed gas containing fluorine and nitrogen into the first reaction kettle, feeding the rest mixed gas into the second reaction kettle for reaction, and discharging the rest gas; (3) when the reaction in the first reaction kettle is finished, discharging generated iodine pentafluoride and then preparing the mixed system; (4) feeding the mixed gas containing fluorine and nitrogen into the second reaction kettle, feeding the rest mixed gas into the first reaction kettle for reaction, and discharging the rest gas; (5) when the reaction in the second reaction kettle is finished, discharging generated iodine pentafluoride and then preparing the mixed system; and (6) repeatedly performing the operations from the step (2) to the step (5). The preparation method achieves continuous production of the iodine pentafluoride and increase a utilization ratio of the raw materials. A product is stable in quality and high in yield. Meanwhile, waste of a fluorine resource and environmental pollution are avoided.

The invention discloses a soilless cultivation nutrient formula of peonies. The soilless cultivation nutrient formula is composed of, by weight, 13-16.5 parts of diphenylamine, 11.5-12.5 parts of ammonium ferric sulfate, 2-20 parts of auxin, 4-5 parts of methionine, 0.4-0.8 part of barium sulfide, 0.1-0.3 part of barium vanadate, 0.1-0.3 part of iodine pentafluoride, 0.05-0.2 part of glycerol phosphate calcium and the balance water. The soilless cultivation nutrient formula is made by weighing and evenly mixing the ingredients according to the ratio. By the adoption of the nutrient liquid, the seepage force and diffusivity of the nutrient liquid are greatly enhanced in the breeding process, so that the seeding stage is greatly shortened, the emergence rate is increased, the quality of emergence is improved, and meanwhile the cost is lowered; the nutrient liquid is more suitable for high-altitude low-temperature seedling cultivation.

The invention discloses a technology for preparing iodine pentafluoride by directly fluorating iodine by elemental iodine. The method is mainly characterized in that: an integrated electrolytic reactor is externally connected with a cooling sleeve; an inlet end of the electrolytic reactor is connected with a fluorine inlet pipe; and an iron condenser, a left quartz cold trap and a right quartz cold trap are connected together through a connection pipe. The technology has reasonable process, ensures simple preparation and solves the problem of environmental pollution during the production of iodine pentafluoride, thereby being an ideal technology for preparing iodine pentafluoride.

The invention relates to automatic control of a sulfur tetrafluoride production process, comprising the automatic control of sulfur tetrafluoride synthesis reaction, the automatic control of sulfur tetrafluoride cooling, separating and capturing, the automatic control of iodine pentafluoride preparation, the automatic control of fluoride preparation and purification, the automatic control of rectification and purification and the automatic control of recycling. The invention ensures the stability of the quality of the sulfur tetrafluoride product by adopting measures of system process control analysis, product mass spectrum analysis and chemical analysis and also ensures the continuous and stable running of production; the production process for synthesizing sulfur tetrafluoride adopts DCS (Distributed Control System) automation device control in the whole course, reduces artificial randomness and experience, improves the stability of the product quality as well as the purity, the yield and the production efficiency of the product and reduces the raw material waste and the production cost.

The invention discloses an iodine pentafluoride production method characterized by continuous reaction, high yield, mild and complete reaction, and extremely light pollution degree. The method includes: in an airtight reactor, placing solid iodine above liquid iodine pentafluoride or an iodine pentafluoride solution of iodine; then introducing fluorine gas into the liquid iodine pentafluoride or the iodine pentafluoride solution of iodine, and simultaneously employing a flowable cooling medium to cool the liquid iodine pentafluoride or the iodine pentafluoride solution of iodine and the gas phase generated above solid iodine in a flow direction from the bottom up, controlling the temperature of the liquid iodine pentafluoride or the iodine pentafluoride solution of iodine at 15-100DEG C, and making the iodine pentafluoride steam and iodine steam in the gas phase generated above the solid iodine condense and flow back to the liquid iodine pentafluoride or the iodine pentafluoride solution of iodine. The invention also discloses production equipment special for the method.

The invention relates to a material recycling technique used during sulfur tetrafluoride production. Firstly, the coarse sulfur tetrafluoride gas is produced through reactive synthesis of iodine pentafluoride and sulfur in a sulfur tetrafluoride reactor and then raw materials are initially recycled through condensation, separation and trapping. The impure gases obtained by gas pahse purification during condensation, separation and trapping of sulfur tetrafluoride are evacuated and recovered again through a secondary condensation recovery device. The condensation recovery devices in the initial and secondary stages are utilized to recycle iodine and iodine pentafluoride, which can increase the utilization rate of iodine by more than 70%. The technique can not only reduce material losses and lower production cost but also cut down the volumes to be purified.

There is provided a process for the production of iodine pentafluoride which avoids the problems of the production process of iodine pentafluoride of the prior art as much as possible, and which carries out the reaction of fluorine and iodine moderately, so that iodine pentafluoride is produced more safely and more productively.

In the process for the production of iodine pentafluoride by reacting fluorine and iodine, fluorine is supplied to the gas phase 14 which is adjacent to the liquid phase 12 of iodine pentafluoride which contains iodine.

The invention discloses a preparation method of iodine pentafluoride. According to the preparation method, iodized alkali metal salt or iodized alkaline-earth metal salt is used as a raw material, iodine pentafluoride is used as a solvent, and a fluorine-nitrogen gas mixture is continuously introduced. At the reaction temperature of 50-150 DEG C, the iodized alkali metal salt or alkaline-earth metal salt is fluorinated for 150-500 h so as to obtain iodine pentafluoride. The invention has advantages as follows: the technology is simple; the raw material is easily available; reaction efficiency is high; and the method is green and environmentally friendly and is suitable for industrial production.