• 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:
    There is disclosed a process for selectively separating hydrogen sulfide from gaseous mixtures which also contain carbon dioxide by chemical absorption with a substantially anhydrous solution of a tertiary amine, such as methyl diethanolamine, and an auxiliary organic solvent, such as sulfolane.
    公开号:SU1309902A3
    申请号:SU813297113
    申请日:1981-06-17
    公开日:1987-05-07
    发明作者:Гадзи Луиджи；Рескалли Карло；Антуанетта Скарамуччи Мария；Джиннази Алессандро
    申请人:Снампрогетти С.П.А. (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to a method for the selective isolation of hydrogen sulphide from gas mixtures containing carbon dioxide, and can be used in the petrochemical and oil refining industries.
    The aim of the invention is to increase the degree of absorption of hydrogen sulfide,
    Example 1. In a column with an internal diameter of 50 mm and a height of 2.5 m, equipped with plates and bubbling caps, the process is carried out at a pressure of 30 kg / cm and. Source gas contains, vol.%: Methane
    fO
    Example 5. In the apparatus of Example 1, the process is carried out with a gas containing, vol.%: COjS and 0.8, the balance up to 00% is CH. Temperature, absolute pressure 15 kg / cm. 1.3 gas countercurrent gas is supplied with 6 kg / h of absorption liquid containing, in wt%: methyldiethanolamine 15, diethylethanol min 20, sulfolane 50 and N-methyl pyrrolidone 15. The content of hydrogen sulfide in the gas being treated is 8 ppm, selective A decrease of 7.6 times.
    Example 6. At initial us95,6, carbon dioxide 4,0 rf cepoBo-lovi by example in the absorption
    prenod 0,4. The absorption solution consists of 35% by weight of methyldiethanolamine and 65% by weight of sulfolane. The gas flow rate is 3.45 and the liquid flow rate is 6 kg / h. From the head of the column, a gas is obtained with a hydrogen content of 5 ppm.
    Spent absorption solution is fed to a stripping column with a diameter of 80 mm and a height of 1.5 m, equipped with plates with bubbling caps and operating at an absolute pressure of 100 mm Hg. Gas, half of the head part, contains, vol.%: Hydrogen sulfide 42.5 and carbon dioxide 57.5.
    The decrease in the HS content is 99.9%, and the decrease in the COj content is 13.5%. Thus, the reduction selectivity is 7.4 times longer for dl. ,
    Example 2. Under the conditions of Example 1, an absorption solution is used consisting of 26% by weight of dimethylethanolamine and 74% by weight of N-methylpyrrolidone. The selectivity of a decrease of 7.0-fold, although all the time containing
    HjS in the treated gases below 10 cent. p.
    Example 3. Under the conditions of Example 2, an absorbent solution consisting of 35% by weight of diethylethanolamine and 65% by weight of N-formyl morpholine is used. The decrease selectivity is 7.2 times.
    Example 4. The solution used consists of 35% by weight of N-methylmorpholine and 65% by weight of L-metric-3-monofolone.
    Example B. Under conditions similar to example 1, 45 absorbent solution contains, wt%:
    Diisopropylethanolamine 10 Methyldiisopropanolamine 15 Triethanolamine15
    ; Methoxyistilled glycol 20. Ethyl glycol 20 Dimethylformamide 20
    Absorption selectivity is approximately 6.2 times higher for H2S, and c. gas exhaust from absorption co50
    The gas flow rate, 55 onn, contains less than 1 ppm HjS. regeneration is carried out at atmospheric pressure. Example 9. The resultant pressure is obtained. The rest of the conditions are similar to Example B with the example of Example 1. The selectivity to a decrease in the working conditions on the application of 7.1-fold .RU; thanks to the use of it
    Example 5. In the apparatus of Example 1, the process is carried out with a gas containing, vol.%: COjS and 0.8, the balance up to 00% is CH. Temperature, absolute pressure 15 kg / cm. 1.3 gas countercurrent gas is supplied with 6 kg / h of absorption liquid containing, in wt%: methyldiethanolamine 15, diethylethanolamine 20, sulfolane 50 and N-methylpyrrolidone 15. The hydrogen sulfide content in the gas being treated is 8 ppm, selectivity decrease by 7.6 times.
    Example 6. At initial conditions
    the column is injected with a gas of the same composition as in Example 1, the Absorbing solution contains, in wt.%:
    Dim etylprol o pan ol amine. 15 Dimethylisopropanolamine 20 N-methylimidazole65
    In the gas withdrawn from the top of the column, less than 1 ppm (ppm) of 3.47% COj will be deposited
    The degree of absorption is thus 99.9%, while l CO is about 13.15%. The selectivity of absorption is 7.6 times higher for dl.
    Example 7. Under conditions analogous to example 6, the solution used contains, wt%;
    Dimethylethyl -2-ethoxyamine 20 Propylisopropylethanolamine 20 Dimethoxydiethylene glycol 30 Dimethoxytriztilen glycol 30 The selectivity of absorption is 6.4 times longer for, and the gas leaving the absorption column contains less than 1 ppm H2.S.
    Example B. Under conditions similar to example 1, 45 absorbent solution contains, wt%:
    Diisopropylethanolamine 10 Methyldiisopropanolamine 15 Triethanolamine15
    ; Methoxyistilled glycol 20. Ethyl glycol 20 Dimethylformamide 20
    The selectivity of absorption is approximately 6.2 times higher for H2S, and in the gas leaving the absorption
    solution containing
    wt.%:
    Ethyldiethanolamine20
    Dipropylethanolamine.10
    Isopropyldiethanolamine 10
    Diethylpropanolamine10
    S, N-dimethylimidazolin-2-on50
    Tertiary amine 26-50 Organic Solvent Remaining 2, Absorbent according to claim 1, about tl and because, in order to increase the absorption selectivity, it additionally contains water to
    Example 10. In the apparatus of Example I, the process is carried out under the same operating conditions with the same tO absorption solution, to which 3% by weight of water is added. From a distillation column operating at atmospheric pressure and temperature at the bottom of the column, 5% by weight, 5 wt.%, Are obtained. A gaseous distillate comprising 3. Absorbent according to claim 1, 55.3% by volume HjjS and 64.7% by volume CO. The reduction is 99.9%, the reduction in CO2 is 18.4%. The selectivity of reduction is 5.4 in favor of hydrogen sulfide.
    Example 11. The operating conditions are the same as in Example 4. The same absorption solution is fed into the system as in Example 4, but. containing an additional amount of water 6%; the total flow rate of the solvent mixture is increased to 6.6 to g / h in order to provide an increased
    tl and the fact that, as a tertiary amine, contains an amine selected from the group consisting of methyldithanolamine, dimethylethanolamine, dizethylethanolamine, N-methylmorpholine, dimethylisopropanolamine, diisopropyl azanolamine, dipropyzthanolamine, Isopropyl amine propane, diisopropyl azanolamine, dipropyzethanolamine, Isopropyl amine, diisopropyl methyl amine, dipropyzethanolamine, Isopropyl amine, diisopropyl methyl amine, dipropyzethanolamine, isopropyl amine, diisopropyl methyl amine, dipropyl azanol amine, Iopropylamine
    lamin or their mixture.
    4. The absorbent according to claim 1, about tl and - due to the fact that as an organic gr the solvent contains
    carbon dioxide solubility. Os-solvent, selected from the group,
    the net amount of COj in the waste containing sulfolane, N-methyl pyrrogase is reduced to 3.17% by volume, while
    as residual content less
    5 ppm.
    Claim 1. Absorbent for selective release of hydrogen sulphide from gas gas, K-methyl-3-morpholrn, N-formyl-morpholine, H, K, -dimethylformamide, N, N, -dimethyl-imidazolidin-2-one, N-35 tilamidazole, dimethoxy diethylene glycol, dimethoxytriethylene glycol, or a mixture thereof.
    Editor I.Shulla Order 1808/58
    Compiled by L.Temirova Techr ed M. Khod a
    Corrector
    Circulation 637 Subscription
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    “Production and printing company, Uzhgorod, Projecto St., .4
    9024
    . carbon dioxide containing organic solvent and tertiary amine, characterized in that, in order to increase the degree of absorption of hydrogen sulfide, it contains these components in the following ratio, wt.%:
    Tertiary amine 26-50 Organic Solvent Remaining 2, Absorbent according to claim 1, about tl and because, in order to increase the absorption selectivity, it additionally contains water to
    tO t5 2 wt,%. 3. The absorbent according to claim 1, tO t5 2 wt.%. 3. The absorbent according to claim 1,
    tl and the fact that, as a tertiary amine, contains an amine selected from the group consisting of methyldithanolamine, dimethylethanolamine, dizethylethanolamine, N-methylmorpholine, dimethylisopropanolamine, diisopropyl azanolamine, dipropyzthanolamine, Isopropyl amine propane, diisopropyl azanolamine, dipropyzethanolamine, Isopropyl amine, diisopropyl methyl amine, dipropyzethanolamine, Isopropyl amine, diisopropyl methyl amine, dipropyzethanolamine, isopropyl amine, diisopropyl methyl amine, dipropyl azanol amine, Iopropylamine
    lamin or their mixture.
     containing sulfolane, N-methylpyrrolvdon, K-methyl-3-morpholrn, N-formyl-morpholine, H, K, -dimethylformamide, N, N, -dimethylimidazolidin-2-one, N-methylamidazole, dimethoxy diethylene glycol, dimethoxytriethylene glycol or a mixture thereof.
    Proofreader M.Sharoshi
    权利要求:
    Claims (4)
    [1]
    The claims 35
    1. The absorbent for the selective separation of hydrogen sulfide from a gas mixture containing carbon dioxide, including an organic solvent and a tertiary amine, characterized in that, in order to increase the degree of absorption of hydrogen sulfide, it contains these components in the following ratio, wt.%:
    Tertiary amine 26-50
    Organic solvent Else
    [2]
    2. The absorbent according to claim 1, characterized in that, in order to increase the selectivity of absorption, it further comprises water up to
    2 wt.%.
    [3]
    3. The absorbent according to claim 1, t l and the fact that as a tertiary amine contains an amine selected from the group containing me. tildiethanolamine, dimethylethanolamine, diethylethanolamine, N-methylmorpholine, dimethylisopropanolamine, diisopropylethanolamine, dipropylethanolamine, isopropyldiethanolamine, e tildiethanolamine or a mixture thereof.
    [4]
    4. The absorbent according to claim 1, wherein the organic solvent contains a solvent selected from the group consisting of sulfolane, N-methylpyrro <lvdon, N-methyl-Z-morpholn, N-formylmorpholine, Ν , Ν, dimethylformamide,
    N, N, dimethylimidazolidin-2-one, N-methylamidazole, dimethoxydiethylene glycol, dimethoxytriethylene glycol or a mixture thereof.
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    同族专利:
    公开号 | 公开日
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    FR2485945A1|1982-01-08|
    NL8103203A|1982-02-01|
    DE3126136A1|1982-03-11|
    DE3126136C2|1987-01-22|
    YU164881A|1983-10-31|
    GB2079307B|1984-05-10|
    NO153717C|1986-05-14|
    PL231781A1|1982-02-15|
    IT1132170B|1986-06-25|
    US4545965A|1985-10-08|
    NZ197203A|1984-05-31|
    BR8103870A|1982-03-09|
    NO153717B|1986-02-03|
    AU542254B2|1985-02-14|
    JPS5747705A|1982-03-18|
    BE889467A|1982-01-04|
    LU83463A1|1982-02-17|
    PL130823B1|1984-09-29|
    ES504130A0|1982-06-01|
    SE8104151L|1982-01-05|
    IE51368B1|1986-12-10|
    EG15364A|1986-03-31|
    DK277081A|1982-01-05|
    NO812120L|1982-01-05|
    CH649473A5|1985-05-31|
    GR74572B|1984-06-29|
    CA1165098A|1984-04-10|
    IT8023241D0|1980-07-04|
    DD200979A5|1983-06-29|
    ES8205131A1|1982-06-01|
    AU7145381A|1982-01-07|
    SE445711B|1986-07-14|
    GB2079307A|1982-01-20|
    IE811502L|1982-01-04|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    IT23241/80A|IT1132170B|1980-07-04|1980-07-04|SELECTIVE SEPARATION PROCESS OF HYDROGEN SULFURATED FROM GASEOUS MIXTURES CONTAINING ALSO CARBON DIOXIDE|
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