Coal tar whole fraction hydrotreatment process
A technology for hydrotreating and coal tar, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment. It can solve problems such as bed blockage, complicated process, and large amount of catalyst, so as to reduce equipment and operating costs, simplify Process flow and the effect of long operation cycle
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Embodiment 1~3
[0027]This example is a test of treating the whole fraction of coal tar by adopting the combined process of suspension bed hydrogenation and fixed bed hydrofining. The specific operation process is shown in Figure 1. Mix the whole fraction of coal tar in the raw material tank 1 or the whole fraction of coal tar and the mixed feed prepared by a homogeneous catalyst in a certain proportion with hydrogen 11, enter the suspension bed reactor 2, and the stream coming out from the bottom of the suspension bed reactor flows through The settling tank 3 enters the distillation unit 4, and the water 7, the light oil fraction of 370°C are cut out. Among them, the light oil fraction of 370°C to the discharge device, and the rest circulates back to the suspension bed reactor 2 . Test conditions and results are shown in Table 2, and product properties are shown in Table 3. The suspended bed catalyst used is water-soluble nickel phosphomolybdate. The composition and properties of the hyd...
Embodiment 4
[0029] The combined process of suspended bed and fixed bed hydrofining and deep dearomatization treats the whole fraction of coal tar, and the diesel oil produced can meet the national standards. The specific operation process is shown in Figure 2, which is basically the same as Figure 1, except that the 150-370°C diesel fraction from the distillation unit 6 enters the fixed-bed dearomatization reactor 12 for deep dearomatization reaction. The properties of the hydrotreating catalyst are the same as in Example 1. The composition and properties of the dearomatization catalyst are as follows: 25% tungsten oxide, 5% nickel oxide, and the carrier is alumina containing 10% silica. The pore volume of the catalyst is 0.35ml / g, and the specific surface area is 200m 2 / g. Reaction conditions and results are shown in Table 4, and product properties are shown in Table 5.
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[0032] Example 1
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