Coal tar full-fraction hydrogenation method for coupling slurry bed and static bed
A technology for coal tar and full distillate, applied in the field of coal chemical industry, can solve the problems of complex multi-stage hydrotreating process and high input cost
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[0021] Example 1
[0022] The whole distillate of high-temperature coal tar is used as the raw material, which is denoted as 1# feedstock oil, and its properties are shown in Table 1. The water and mechanical impurities are removed by pretreatment, and mixed with the hydrocracking catalyst uniformly into the slurry bed reactor for hydrocracking. The reaction conditions are listed in Table 3. The initial product after hydrocracking enters the fractionation tower, and the light fraction enters the fixed-bed reactor in the latter stage for hydrorefining. This part of the fraction accounts for about 15wt%, and the middle fraction about 65wt% is recycled back to the slurry bed. The reactor continues hydrocracking, and about 20wt% of the heavy fraction is filtered to remove part of the catalyst and the coke produced during the reaction, and then enters the raw material storage tank. The recycling rate of the catalyst is about 80%. The light ends fixed bed hydrofinishing reaction con...
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[0023] Example 2
[0024] The mixture of high-temperature coal tar phenol oil fraction and medium-temperature coal tar full-distillate oil is used as feedstock oil, denoted as 2# feedstock oil, its properties are shown in Table 1, water and mechanical impurities are removed by pretreatment, and the feedstock is mixed with hydrocracking catalyst Evenly enter the slurry bed reactor, the hydrocracking reaction conditions are listed in Table 3, the initial product after hydrocracking enters the fractionation tower, and the light fraction enters the rear fixed bed reactor for hydrorefining, and this part of the fraction accounts for about 45wt% , about 50wt% of the middle distillate is circulated back to the slurry bed reactor to continue hydrocracking, and about 5wt% of the heavy distillate is filtered to remove part of the catalyst and the coke produced in the reaction process and then enters the raw material storage tank. The recycling rate of the catalyst is about 90%. The light...
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[0025] Example 3
[0026] The mixture of whole distillate oil and residual oil of low-temperature coal tar is used as the raw material oil, which is recorded as 3# raw material oil. The hydrocracking reaction conditions are listed in Table 3. The initial product after hydrocracking enters the fractionation tower, and the light fraction enters the fixed bed reactor in the latter stage for hydrorefining. This fraction accounts for about 30wt%, and the middle fraction accounts for about 55wt%. Circulating back to the slurry bed reactor to continue hydrocracking, about 15wt% of the heavy fraction is filtered to remove part of the catalyst and the coke produced during the reaction, and then enters the raw material storage tank. The recycling rate of the catalyst is about 85%. The hydrofinishing reaction conditions are listed in Table 3. The product is cut into gasoline and diesel products through a rectifying tower, and the properties of the final products are listed in Table 4. ...
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