Light hydrocarbon desulfurization method
A light hydrocarbon, flow direction technology, applied in the direction of processing hydrocarbon oil, hydrocarbon oil treatment products, refining with alkaline aqueous solution, etc., can solve problems such as alkali elution desulfurization failure
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Embodiment 1
[0090] In this embodiment, the two-phase mixed reactor described in the present invention is used to carry out deep desulfurization of sulfur-containing light hydrocarbons, specifically as follows:
[0091] The liquefied petroleum gas containing mercaptan and the alkali solution contact in the alkali cleaning unit, and the mercaptan reacts with the NaOH in the alkali solution to form sodium mercaptide which is dissolved in the alkali solution. The liquefied gas discharged from the alkaline cleaning unit enters the settling unit and is separated from part of the alkali liquor entrained to complete the purpose of sweetening. The lye discharged from the settling unit enters the oxidation regeneration unit, and in the packed bubbling bed reactor, the lye reacts with air to convert sodium mercaptide into disulfide. The desulfurized lye discharged from the oxidation regeneration unit enters the back extraction unit, contacts with gasoline, removes the entrained disulfide, and obtain...
Embodiment 2
[0102] In this embodiment, the two-phase mixed reactor described in the present invention is used to carry out deep desulfurization of sulfur-containing light hydrocarbons, specifically as follows:
[0103] The method for light hydrocarbon desulfurization in this embodiment is similar to that in Example 1, and 19 mixing channels are also included in the two-phase mixed reactor, the difference is:
[0104] The light hydrocarbon in this example is light gasoline, and there is only one two-phase mixed reactor in the alkali washing unit and the stripping unit.
[0105] The selected light gasoline was obtained from Jiujiang Petrochemical, and its hydrocarbon volume percentage composition is shown in Table 2.
[0106] Table 2: Volume percentage composition of light gasoline hydrocarbons
[0107] n-paraffin / % Isoparaffin / % Olefin / % Diene / % C4 2.141 0.978 5.237 0 C5 13.368 41.388 29.821 0.039 C6 0 5.889 1.140 0
[0108] The total amount ...
Embodiment 3
[0114] In this embodiment, the two-phase mixed reactor described in the present invention is used to carry out deep desulfurization of light hydrocarbons, specifically as follows:
[0115] The method of light hydrocarbon desulfurization in the present embodiment is similar to that in embodiment 2, difference is:
[0116] In the alkaline cleaning unit: according to the flow direction of the alkali solution in the shell side of the reactor, the diameters of the distribution holes are 1mm, 0.7mm and 0.4mm respectively, the depth of the distribution holes is 1mm, and the distance between the centers of two adjacent distribution holes is the same. is 27mm. The cross-sectional area of the mixing channel perpendicular to the light hydrocarbon flow direction is 6mm 2 , the length of the mixing channel is 1000mm. The temperature in the two-phase mixing reactor was 50° C. and the pressure was 1.2 MPa. The superficial flow velocity of light gasoline at the inlet of the mixing channe...
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