• 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:
    The invention relates to compositions for dissolving sulfur deposits on the inner walls of pipelines transporting sulfur compounds. The aim of the invention is to provide the possibility of multiple use of the composition. In accordance with the invention, for the dissolution of sulfur, a composition containing a catalytic additive and dimethyl polysulfides of the general formula CH3ChCH3 is used, where x is 2 ... 7 in the following ratio of components. wt.%: СНз52СНЗО, 5-2.0; СНз5зСНз 10.2- 12.1; CH354CHNz 14.0-16.7; CH3S5CH3 15.0- 17.1; CH3SeNZ 19.5 - 23.7; CH3SvCH3 29.8 - 34.9, catalytic additive 2.1 - 6.0. The composition is obtained by dissolving in 1000 g of dimethyl disulfide 1000 - 3000 g of sulfur at 80 ° C, followed by cooling the mixture to 10-30 ° C. Dimethylformamide is used as a catalytic additive. dimethyl sulfide, diethylamine, trichethylamine, dipropylamine, diisopropylamine, octylamine, acetamide, hexyl mercaptan butyl mercaptide, dodecyl mercaptan, sodium hydrosulfide. The solubility of sulfur in this solvent is 540–560 g per 100 g of solvent, with a recycling efficiency of 82–84%. 2 sp f-ly. 3 tab. Yo
    公开号:SU1623571A3
    申请号:SU4027220
    申请日:1986-03-28
    公开日:1991-01-23
    发明作者:Гесне Патрис；Каррез Морис
    申请人:Сосьете Насьональ Елф Акитэн (Ародюксьон) (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to compositions for dissolving deposits on the inner walls of pipelines transporting sulfur compounds, and to methods for preparing a composition for dissolving sulfur.
    The purpose of the invention is to provide reusable composition.
    The composition contains a catalytic additive and dimethyl polysulfides of the general formula CH 3 S 3 CH 3 S, where x 2 ... 7 in the following ratio of components, wt.%: CH 3 OH 2 0.5 - 2.0; СНзЗзСНз 10.2 - 12.1: СНз54СНз 14.0 - 16.7; СНзЗбСНз 15.0-17.1; СНзЗбСНз 19.5 - 23.7; SNZZtSNz 29.8 - 34.9; additive 2.1 -6,0.
    The composition is obtained by dissolving 1000 to 3000 g of elemental sulfur in 1000 g of dimethyl disulfide at 80 ° C, followed by cooling the mixture to 10 to 30 ° C.
    Dimethylformamide (DMF), dimethyl sulfide (DDS), diethylamine, triethylamine, dipropylamine, diisopropylamine, octylamine, acetamide, hexyl mercaptan, butyl mercaptide, dodecyl mercaptan are used as a catalytic additive. sodium hydrosulfide.
    Example 1. In a 5-liter reactor equipped with a stirrer and heater, 890 g of DMDS, 100 g of DMF, 10 g of NaSH catalyst and 2000 g of sulfur are introduced. The mixture is heated to 80 ° C with continuous stirring and maintained at this
    temperature until sulfur is completely dissolved. The contents of the reactor are then poured into a vessel and cooled to 20 ° C. At the same time, a mixture containing 64% of the introduced sulfur in the form of dimethyl poly sulphides and DMF of the following composition floats to the surface, wt.%
    SNZZZSNz 2.0
    SNZZZSNz 10.40
    SNSZNz 15,0
    СНзСбСНзз 15.3
    СНзСеСНз 20.5
    СНзСтСНз 32,8
    DMF 4.0
    The maximum solubility of sulfur in this mixture at 80 ° C is 5450 g of sulfur in 1000 g of the mixture.
    Example 2. In the same apparatus and in the same manner as in the example, sulfur is dissolved in the mixture of dimethyl poly sulphides prepared in Example 1. To do this, 1000 g of dimethyl polysulfide mixture is mixed with 1000 g of sulfur at 80 ° C to completely dissolve sulfur. subsequent cooling to 20 ° C and removing the supernatant phase and precipitated sulfur. 800 g of the supernatant is then mixed again with 800 g of sulfur until the sulfur is completely dissolved and the mixture is cooled to 20 ° C. This operation is repeated many times. In this case, each time the amount of the supernatant phase interacts with an equivalent amount of sulfur at 80 ° C and is cooled to 20 ° C.
    The floating phases after each cycle of dissolution / precipitation are analyzed and the data are presented in Table 1.
    As follows from Table 1, the mixture of dimethyl polysulfides from cycle to cycle has an almost constant composition. This property of the sulfur solvent remains constant after each cycle. The maximum dissolving capacity is 540 g of sulfur per 100 g at 80 ° C. The recycling efficiency is about 82%.
    When dissolved in 1000 g of a mixture of dimethyl polysulfides with 2000 g of sulfur, the dissolution / precipitation operation is repeated several times and after each cycle the supernatant phase is mixed with sulfur, the amount of which is 2 times the mass of this phase. In this case, the emerging phase after each cycle is analyzed, and it has the following composition,%
    СНз52СНз1,2
    SNZZZSNz 10.5
    SNZ34SNz 14.4
    SNZZBSNz 15.5
    СНзЗбСНз 19.5
    СНз57СН334,9
    DMF 4.0
    When 3000 g of sulfur is dissolved in 1000 g of dimethyl polysulfide (DMPS) mixture, the recycling efficiency is 51%, and when 4000 g of sulfur is dissolved in 1000 g of dimethyl polysulfide mixture, the recycling efficiency is 33%. From this it follows that it is impractical to dissolve particularly large amounts of sulfur in DMPS.
    Example 989 g DMDS, 1 g tertiary dodecyl mercaptan, 10 g triethylamine and 2000 g sulfur are introduced into a 5 liter reactor equipped with a stirrer and heater. Further, the process is carried out as in Example 1. The mixture that has emerged on the surface has the following composition, wt.% CH 3 S 3 CH 3 S 3 CH 3 S 3 3 3 3 3 3 3 4 6 6 3 3 3 3 3 3 3 3 3 3 3 3 3
    The maximum solubility of sulfur in this mixture is 560 g in 100 g at 80 ° C. 1000 g of the DMPS mixture thus obtained is mixed with 1000 g of sulfur and the steps of dissolving sulfur and precipitating are repeated many times. The emerged phase after each cycle is analyzed and the results are presented in table 2.
    Table 3 provides comparative data on the recycling efficiency of the proposed and known methods.
    Thus, the proposed method provides the possibility of repeated use of a sulfur solvent with a high sulfur recovery efficiency,
    40
    权利要求:
    Claims (2)
    [1]
    1. The composition for dissolving sulfur, including dimethyl polysulfides and an additive selected from the group consisting of amine, amide, mercaptan and mercaptide, is distinguished by the fact that. in order to provide the possibility of repeated use of the composition, it contains dimethyl polysulfides of the general formula CH3ChCH3, where x 2 ... 7, with the following ratio of components, wt.%
    СНз32СН30,5-2,0 СНзЗзСНз 10,2-12,1 СНзЗлСН 14.0-16.7 СНзЗбСНз 15.0- 17.1 5 СНзЗбСНз 19.5-23.7 СНзЗтСНз 29.8-34.9 Additive 2,1 - 6.0
    [2]
    2. Method of preparing a composition for dissolving sulfur, including dissolving elemental sulfur in dimethyl disulfide
    at 80 ° C and subsequent cooling of the mixture to 10-30 ° C, characterized in that
    sulfur is dissolved in an amount of 1000 - 3000 g per 1000 g of dimethyl disulfide.
    Table 1
    Table 2
    Table3
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    SU1505930A1|1989-09-07|Method of producing alkylsulfides
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    同族专利:
    公开号 | 公开日
    DE3610580C2|1998-01-29|
    DE3610580A1|1986-10-02|
    CA1279240C|1991-01-22|
    CN86102133B|1988-03-23|
    CN86102133A|1986-11-19|
    FR2579585A1|1986-10-03|
    FR2579585B1|1990-06-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3846311A|1971-09-07|1974-11-05|Amoco Prod Co|Method for removing elemental sulfur from wells and flowlines|
    US4239630A|1978-11-29|1980-12-16|Standard Oil Company |Method for dissolving sulfur deposits rapidly|
    US4248717A|1979-05-29|1981-02-03|Standard Oil Company |Method for removing elemental sulfur from high temperature, high pressure wells and flow lines|US4855113A|1986-10-27|1989-08-08|Pennwalt Corporation|Apparatus for removing sulfur from organic polysulfides|
    US4804485A|1987-05-08|1989-02-14|Pennwalt Corporation|Polyalkyleneoxyamine catalysts for dialkyl disulfides and/or polysulfides used in dissolving sulfur|
    US5186848A|1988-10-11|1993-02-16|Elf Atochem North America, Inc.|Preparing sulfur solvent compositions comprising treating a sulfide and polyalkyleneoxyamine or polyalkyleneoxypolyamine mixture with an alkylamine or alkanolamine|
    US5028343A|1989-02-09|1991-07-02|Atochem North America, Inc.|Stabilized sulfur dissolving compositions|
    BRPI0923461A2|2008-12-23|2016-01-12|Basf Se|process for compressing a gas stream comprising hydrogen sulfide, and using a mixture|
    CN104592071B|2015-01-13|2016-12-07|湖北兴发化工集团股份有限公司|A kind of Methyl disulfide production process dissolved state sulfur Adding Way|
    CN105355894B|2015-10-16|2018-04-03|广东烛光新能源科技有限公司|A kind of preparation method of nano-sulfur particles|
    CN108002350B|2017-11-20|2020-11-06|浙江海洋大学|Composite extractant and method for separating and recovering sulfur by using same|
    CN108977656A|2018-08-24|2018-12-11|淄博淦达环保科技有限公司|A kind of lixiviation process preparation process of Zinc in Zinc Concentrates and sulphur|
    法律状态:
    2005-10-20| REG| Reference to a code of a succession state|Ref country code: RU Ref legal event code: MM4A Effective date: 20040329 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR8504778A|FR2579585B1|1985-03-29|1985-03-29|PROCESS AND PRODUCT FOR SULFUR DISSOLUTION|
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