A device and method for preparing chemicals by reaction-separation-reaction of coal tar fractions
A technology of coal tar and chemicals, which is applied in the field of reaction-separation-reaction equipment for the preparation of chemicals from polycyclic aromatic hydrocarbon fractions of coal tar, can solve the problems of wasting resources, inefficient utilization of high-value components of coal tar, and polluting the environment. Achieve the effect of improving efficiency, increasing added value, and increasing conversion rate
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Embodiment 1
[0052] The coal tar as a coaT in Northern Shaanxi is raw material, and the basic properties and elements analysis results are shown in Table 1. The fractions of naphthoalk, washing, and hydrazine oil thereof and mixed fractions thereof (a mixture of three single fractions) were distilled. The resulting yield is shown in Table 2. The mixed fractions obtained by the test were analyzed using gas chromatography.
[0053] The basic properties and elements analysis of coal tar used in Example 1 were shown in Table 1.
[0054] Table 1 Basic nature and elemental analysis of coal tar
[0055]
[0056] Table 2 Coaltosis distillation
[0057]
[0058]
Embodiment 2
[0060] The coal tar as the coaT in Northern Shaanxi is raw material, of which naphthalene, Philippine, and pyrene content is 11.84%, 4.67%, 1.52%, respectively. The mixed distillate oil (210-360 ° C) was distilled, followed by deactinyl reactor 5 filled with an exempened catalyst, sufficient contact with the desalkyl catalyst (mass air speed ratio of 2-3WHSV · H) -1 ), At a temperature of 480 ° C, the reaction was initially under 2 MPa conditions for 4 h. The content distribution of naphthalene, Philippine, and ruts in the reaction product was increased to 14.09%, 6.12%, 2.48%. Differential oil returned by the desorenyl reaction is delivered to the multi-stage polycyclic aromatic hydrocarbon separator for separation, the yield of naphthalene, Philippine, and pyrene in the material is 13.81%, 5.94%, 2.36%, respectively. The results are shown in Table 3, and the hydrodealkyl reaction effectively improves the content of the polycyclic aromatic hydrocarbon single component in coal tar...
Embodiment 3
[0066] The hydrodealkyl grade in this example is hydrolyvanoyl alkyl polycyclic aromatic hydrocarbon (alkyl naphthalene, alkylfi, alkylfixyl) in crude oil. The hydroformation catalyst to the alkyl polycyclic aromatic hydrocarbon is converted to a polycyclic aromatic hydrocarbon in a study of 2-methylnaphthalene (model compound). The hydrodealkyl cation catalyst in this embodiment includes a carrier, an active component, a cocatalyst, a mixture of one or more of ZSM-5, beta, Hy; the active group is Ni, One or more of MO, CO, W; the amount of load of the active component is 3-9% (according to the mass fraction); the auxiliary agent is 0.07-0.5% of the load of 0.07-0.5%; an equivalent impregnation The active component, the auxiliary agent load is loaded onto the catalyst carrier, and then 4-6 h then at 120 ° C for 450 to 550 ° C for 4-6 hours, and the hydrodealkyl group catalyst can be obtained. The reaction temperature at the time of application of the catalyst was 480 ° C, and the ...
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