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Method for determining organic sulfur in hydrodesulfurization reaction products

A technology of hydrodesulfurization and reaction products, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as environmental pollution, and achieve the effects of strong operability, stable operation, and reduced analysis steps

Active Publication Date: 2013-01-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that after the existing hydrodesulfurization reaction, the product needs to be washed with inorganic mercury to remove hydrogen sulfide, which is likely to cause environmental pollution. A method for measuring organic sulfur in the hydrodesulfurization reaction product is provided. method

Method used

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  • Method for determining organic sulfur in hydrodesulfurization reaction products
  • Method for determining organic sulfur in hydrodesulfurization reaction products

Examples

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Embodiment 1

[0024]From top to bottom, it includes reflux section A, rectification section B, stripping section C and tower still D; tower still D is equipped with inert gas inlet 1, liquid discharge port 2, desulfurized product outlet 3 and liquid level control 12. The inlet 5 of the desulfurization liquid entering the stabilization tower is located between the stripping section C and the rectifying section B, and the inside of the stripping section C and the rectifying section B is equipped with packing 11; Inlet 8, condensate outlet 9 and non-condensable gas outlet 10; the entire stabilizing tower has a heating layer or insulation layer outside. The inert gas inlet 1 is located at the lower part of the tower kettle D, the liquid discharge port 2 is located at the bottom of the tower kettle D, the desulfurized product outlet 3 is located at the bottom of the liquid level controller 12, and the temperature control thermocouple 4 goes deep into the tower kettle from the lower part of the to...

Embodiment 2

[0028] The dehydrogen sulfide stabilization tower is adopted, and the gas feed position entering the stabilization tower is in the extraction and retention section, with 6 heating control points inside and 3 heating control points outside, respectively controlling the feed temperature of the liquid raw material, the temperature of the rectification section, and the stripping section. The temperature of section, tower kettle and tower top reflux; the packing of the stabilizing tower is a stainless steel Raschig ring with a diameter of 15mm. Other structures and settings of the stabilizing tower are the same as in Example 1, the temperature of the tower bottom is controlled at 180° C., the liquid fraction is kerosene, and other working conditions are the same as in Example 1. The sulfur content data of the product after desulfurization are shown in Table 1.

Embodiment 3

[0030] Adopt the dehydrogen sulfide stabilizing tower of embodiment 1, interior has 2 heating control points; The outside has 1 heating control point, respectively controls the liquid rectifying section stripping section temperature, the temperature of tower kettle, tower top reflux; The filler is a ceramic ring with a diameter of 3mm. The liquid fraction is diesel oil, and other structures and settings of the stabilizing tower are the same as those in Example 1. See Table 1 for the working conditions and the sulfur content of the product after desulfurization.

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Abstract

The invention relates to a method for determining organic sulfur in hydrodesulfurization reaction products and mainly solves the problem existing in the prior art that inorganic sulfur after continuous hydrodesulfurization catalytic reaction needs mercury scrubbing in product analysis. The method for determining organic sulfur in hydrodesulfurization reaction products comprises the following steps of: allowing an inert gas to enter a column bottom of a stabilization tower; allowing hydrodesulfurization reaction products to enter the stabilization tower from a retention section and a central section and to be heated in the column bottom of the stabilization tower, allowing heavy components in the reaction products to flow to the column bottom, allowing a gas mixture I obtained after mixing light components and the inert gas to pass through a rectifying section and flow to a reflux section; cooling the gas mixture I to reflux at the temperature which guarantees that the light components are all condensed into liquids, sending the cooled light components to the column bottom, and discharging the inert gas and a hydrogen sulfide gas from a non-condensable gas outlet of the reflux section; removing hydrogen sulfide hydrodesulfurization products, and determining organic sulfur by a sulfur determinator. By the adoption of the technical scheme, the above technical problem can be well solved. The method provided by the invention can be used in industrial application of hydrogen sulfide removal of catalytic desulfurhydrogenation reaction products.

Description

technical field [0001] The invention relates to a method for measuring organic sulfur in hydrodesulfurization reaction products. Background technique [0002] Hydrodesulfurization is widely used in petrochemical, coal chemical and other chemical fields, especially in oil refining, ethylene and other petrochemical fields. If the sulfur in the material is not removed, the subsequent process cannot be carried out, or the subsequent process will be affected, so it must be removed. Industrially, in the process of steam thermal cracking to produce ethylene, the by-product pyrolysis gasoline contains hundreds of μg / g of organic sulfur, which is removed by catalytic hydrodesulfurization and converted into hydrogen sulfide from the reaction raw material hydrogen It is separated from the gas phase, but a certain amount of hydrogen sulfide is still dissolved in the liquid phase, and flows out of the liquid together with the liquid product, and then passes through the dehydrogen sulfid...

Claims

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Application Information

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IPC IPC(8): G01N33/00
Inventor 唐之勤宋曙光吴征刘仲能
Owner CHINA PETROLEUM & CHEM CORP
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