Method for preparing thermal conductive oil by using coal liquefied oil
A technology of coal liquefied oil and heat transfer oil, which is applied in chemical instruments and methods, heat exchange materials, petroleum industry, etc. good stability
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Embodiment 1
[0028] Take coal liquefied oil raw material 2 (see Table 1 for properties), take 20kg of this fraction, then add 40kg of furfural, control the temperature at 60°C, stir for 60min, and let the mixture stand still to obtain the following extract; this extract is subjected to atmospheric distillation , to obtain aromatic oil and solvent; inject this aromatic oil into the adsorption column with 10L silica gel, and the volume space velocity is 0.6h -1 , the specific surface area of silica gel is 500m 2 / g, the pore volume is 0.5ml / g, the temperature of this adsorption column is kept at 70°C, and the separated aromatic-poor oil (see Table 3 for properties) can be used as a diesel blending component. The desorbent trimethylbenzene fills the adsorption column, the amount of desorbent is twice that of the adsorbent, and the column temperature is maintained at 35°C. After 45 minutes, the collected desorbent and aromatics are separated by distillation to separate the desorbent and arom...
Embodiment 2
[0031] Coal liquefied oil raw material 2 (properties are shown in Table 1), take 20 kg of this fraction, aromatics extraction and distillation furfural step as in Example 1, the obtained non-aromatic oil can be used as a diesel blending component, and the aromatic oil is injected into a 10L silica gel In the adsorption column, the volume space velocity is 1.0h -1 , the specific surface area of silica gel is 600m 2 / g, the pore volume is 0.6ml / g, the temperature of the adsorption column is kept at 80°C, and the separated aromatic-poor oil can be used as a blending component of diesel oil. Wherein the desorption process is the same as in Example 1, wherein the desorbent used is toluene. The properties of the obtained aromatic-rich oil are shown in Table 2.
[0032] The obtained aromatic-rich oil enters a small hydrogenation unit, and uses hydrofinishing catalyst A to carry out hydrofinishing reaction at a temperature of 340°C and a liquid hourly volume space velocity of 0.9h...
Embodiment 3
[0034] The raw material used in this example is coal liquefied oil raw material 1 (properties are shown in Table 1), except for the following differences, all the other are the same as Example 2, the difference is as follows: the aromatic oil is injected into the adsorption column, and the volume space velocity is 1.2h -1 , the specific surface area of silica gel is 700m 2 / g, the pore volume is 0.7ml / g, and the temperature of the adsorption column is kept at 95°C. The desorbent is xylene.
[0035] The obtained aromatic-rich oil enters a small hydrogenation unit for hydrofining at a temperature of 350°C and a space velocity of 0.9h -1 , pressure 5.0MPa, hydrogen oil volume ratio 700:1. Hydrogenated oil was obtained (see Table 4 for properties).
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Abstract
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