• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Process and apparatus are disclosed for the preparation of sulphur hexafluoride of high purity, starting from elemental fluorine and sulphur, both in gaseous phase, and operating with an excess of fluorine, characterized in that the fluorine is fed into a reaction chamber through inlets in a metal plate, maintained at between 30 DEG and 70 DEG C., while the sulphur is fed in through the nozzle of a burner, by regulating a current of an inert gas which is saturated with sulphur by passing same through a zone containing molten sulphur at a temperature between 250 DEG and 500 DEG C., and subsequently superheating the inert gas thus saturated with sulphur to a temperature between 300 DEG and 550 DEG C., and introducing a separate current of the same inert gas between the plate and the burner so as to ensure that the flame that develops when the sulphur and the fluorine come into reactive contact with each other shall be kept insulated from the nozzle, and recovering and purifying the resulting sulphur hexafluoride.
    公开号:SU1276258A3
    申请号:SU782603450
    申请日:1978-04-18
    公开日:1986-12-07
    发明作者:Ди Джоаккино Альберто；Томасси Джулио；Де Мануэле Марио
    申请人:Монтэдисон С.И А. (Фирма)；
    IPC主号:
    专利说明:

    Yu
    权利要求:
    Claims (1)
    [1]
    Sd 1 The invention relates to methods for producing high purity sulfur hexafluoride, which can be used due to its insulating properties, in high-voltage line switches, transformers, radar and electronic equipment. The purpose of the invention is to simplify the process by eliminating the use of intermediate fluorinated compounds. Fig. 1 shows a scheme for implementing the proposed method; FIG. 2 shows an installation for implementing the proposed method. The flux of elemental fluorine through conduit 1 is introduced into the lower part of the reactor 2, and the resulting product, sulfur hexafluoride, is withdrawn from the upper portion, part of which is sent through purification conduit 3 to the purification and the remaining portion enters through conduit 4 for repeated cycle and is divided into two streams: one of them is fed to unit 5, where it is saturated. sulfur vapors, and another stream is directed to the bottom of reactor 2. In installation 5, sulfur is fed through pipe line 6, and through line 7 hexahedral sulfur fluoride, saturated with sulfur vapor, enters the reactor. For repeated cycles, purified hexafluoride can also be used, which is fed into the system under pressure through conduit 8. Through conduit I, elemental fluorine enters the annular chamber 9, from where it is drilled through holes 10 in the metal plate 11 and into the conical part of the reactor. 2 Metal plate It is made of material S having good heat conductivity and resistance to chemical attack, for example, from brass. The holes 10 in the plate are located around the periphery around the axis 12 of the reactor 2 and are distributed so that their axes form an angle of 20-45 with respect to the horizontal surface of the ylite 11 in order to avoid the deposition of solids introduced with fluorine. , on the cold wall of the reaction zone. The metal plate 1 is maintained at 30-70 ° C using a metal gasket 13f, for example, from copper installed between the core and the reactor 58 Sulfur-saturated sulfur hexafluoride (HPS) saturated with vapor of sulfur and superheated to 400-440 ° C is fed into the reactor 2 through block 14, Made of corrosion-resistant material with good thermal conductivity. From unit 14, the GFS enters the reactor through a nozzle 15, the external surface of which is made of nickel for greater resistance to the effects of fluorine. palladium or coated with a layer of inorganic fluoride, such as CaF. An insulating gasket 6, for example asbestos, is installed between the block-nozzle and the slab. The reaction zone is cooled. With the help of a water jacket, where water enters through a 17 ° pipeline. The amount of HFS entering the repeated cycle through pipelines 4 and 8 may vary within 0.1-4 of the total amount of the product obtained and will depend on the saturation temperature of sulfur The distribution of the recirculating product into two streams also varies depending on the level of the workers, but is mainly maintained closer to the 1: 1 ratio of HFS, which is not allowed for recirculation, is cleaned before using. ways. At the outlet of the reactor, the gaseous products are cooled, subjected to a first washing with water and then rinsing with an aqueous solution and NaOH to extract the water-soluble impurities HF, F, SF4-, ,, SOgF. A: After that, it is passed through activated carbon to absorb impurities, SF-O-SFg, and dried overlaid soda particles and molecular sieves. Example 1. From the electrolytic bath to the reaction zone serves Fj with a flow rate of 2.8 kg / h. The temperature of the plate is maintained at 40 ° C. At the outlet of the reactor 2, the flow of HFS with a flow rate of 4.5 kg / h is divided into two approximately equal flows, one of which is used as a carrier of sulfur and passed through molten sulfur having a temperature of 360 ° C, after which it is sent to the reactor through a block 14 with a temperature of 400 ° C. The gas leaving the reactor has the following composition, May. HF 5.48} SFg 93.15; F ,, 1,37. After purification, the product of the following composition, wt.%: SF 99.9939; vzdukh 0.0027; CFjj 0.0030; humidity 0.8%; acidity (HP) 0.025%; toxicity — none. Output rate is 3.52 kg / h of purified gas, product yield is 98.02% of fluorine feed. Example 2 The method is carried out as in example 1 with the only difference that the temperature of the molten sulfur is maintained at 400 ° C and the block temperature is 440 ° C. The gas leaving the repeater has the following composition, in mass%: EF 4.41; SFg 94.71; Fa 0.88, t After cleaning, the prodztst has the following composition, mas%: SF 99 9933; air 0.0041; CF 0.0023; humidity 0.7%, acidity (HF) 0.028%, toxicity not. The proposed method allows to obtain high purity HPS and avoid the use of intermediate fluorinated compounds. DETAILED DESCRIPTION A method for producing sulfur hexafluoride by reacting fluorine gas and elemental sulfur at elevated temperature and an excess of fluorine, characterized in that, in order to simplify the process by eliminating the use of intermediate fluorinated compounds, the process is carried out by mixing different nitrogen fluoride with sulfur hexafluoride, preliminarily gray transmission through molten sulfur with a temperature of 360-400 C and additionally heated to 400-440 C,
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    同族专利:
    公开号 | 公开日
    GB1580887A|1980-12-10|
    US4186180A|1980-01-29|
    IL54518D0|1978-07-31|
    IL54518A|1981-07-31|
    BE866145A|1978-10-19|
    FR2387905B1|1980-06-20|
    US4246236A|1981-01-20|
    CA1099894A|1981-04-28|
    FR2387905A1|1978-11-17|
    IT1085350B|1985-05-28|
    BR7802416A|1979-01-16|
    SE425306B|1982-09-20|
    NL7803975A|1978-10-23|
    DE2816693C2|1987-05-21|
    DE2816693A1|1978-10-26|
    ZA782203B|1979-04-25|
    JPS6127321B2|1986-06-25|
    SE7804279L|1978-10-20|
    JPS53134795A|1978-11-24|
    引用文献:
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    RU2505477C2|2008-06-11|2014-01-27|Авантбио Корпорейшн|Synthesis of brome-promoted sulphur fluoride compounds|US1790395A|1931-01-27|Fuel burner |
    FR968145A|1947-06-28|1950-11-20|
    US3048476A|1955-04-27|1962-08-07|Kellogg M W Co|Conversion of hydrocarbons and carbonaceous materials|
    NL302782A|1963-01-28|
    US3336111A|1964-05-19|1967-08-15|Allied Chem|Apparatus and method for the manufacture of fluorides|
    FR1445502A|1965-03-15|1966-07-15|Electrochimie Soc|Process for preparing sulfur hexafluoride|
    NL6801218A|1967-02-01|1968-08-02|
    US3565345A|1968-07-11|1971-02-23|Texas Instruments Inc|Production of an article of high purity metal oxide|
    FR2145089A5|1971-07-08|1973-02-16|Wendel Sidelor|
    DE2407492C3|1974-02-16|1978-06-22|Kali-Chemie Ag, 3000 Hannover|Process for eliminating the higher-boiling by-products that occur in the production of sulfur hexafluoride|DE3529309A1|1985-08-16|1987-03-19|Hoechst Ag|DEVICE FOR THE COMBUSTION OF HYDROCARBONS|
    US5320680A|1991-04-25|1994-06-14|Silicon Valley Group, Inc.|Primary flow CVD apparatus comprising gas preheater and means for substantially eddy-free gas flow|
    US5443799A|1993-08-03|1995-08-22|Orgral International Technologies Corporation|Process for the alkylation of olefins and apparatus for carrying out this process and others|
    FR2724217B1|1994-09-07|1996-10-25|Air Liquide|DEVICE FOR SPREADING A FLAME BY COANDA EFFECT AND OVEN COMPRISING THE SAME|
    AU2989299A|1998-03-09|1999-09-27|Scott Specialty Gases, Inc.|Method and apparatus for direct fluorination of carbon or sulfur compounds|
    CN101973527A|2010-10-18|2011-02-16|天津市泰旭物流有限公司|Technology for producing sulfur hexafluoride by utilizing fluorine and sulfur steam reaction method|
    US8231855B2|2010-12-28|2012-07-31|Omotowa Bamidele A|Method for production of sulfur hexafluoride from sulfur tetrafluoride|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    IT22611/77A|IT1085350B|1977-04-19|1977-04-19|METHOD FOR THE PREPARATION OF HIGH-PURITY SULFUR SULFUROURIDE, AND EQUIPMENT TO REALIZE IT|
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