Process for preparing needle coke raw material by using medium and low temperature coal tar
A technology of needle coke raw materials and low-temperature tar, which is applied in the field of coal chemical industry, can solve the problems that needle coke cannot be prepared from medium and low temperature tar, and achieve the effects of reducing production costs, good economic benefits, and broadening the range of raw materials
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Embodiment 1
[0034] The process for preparing needle coke raw material using medium and low temperature tar described in this embodiment includes:
[0035] (1) Distill the medium and low temperature tar in the distillation tower to separate the heavy fraction above 350°C;
[0036] Each index of described heavy distillate is as follows:
[0037] QI: 3.2wt%, TI: 5.6wt%, S concentration: 0.26wt%.
[0038](2) The heavy fraction of the medium and low temperature tar is sent to a hydrogenation reactor, and the heavy fraction of the medium and low temperature tar is hydrothermally decomposed in the presence of an iron-based catalyst. The mass of the iron-based catalyst accounts for 0.01% of the heavy fraction mass of the medium and low temperature tar; the iron-based catalyst described in the present embodiment is FeS 2 ;
[0039] The pressure condition of the hydrothermal decomposition is 7MPa, and the temperature is 350°C; the feed rate of the medium and low temperature tar is 10kg / h, and th...
Embodiment 2
[0047] The process for preparing needle coke raw material using medium and low temperature tar described in this embodiment includes:
[0048] (1) Distill the medium and low temperature tar in the distillation tower to separate the heavy fraction above 350°C;
[0049] Each index of described heavy distillate is as follows:
[0050] QI: 2.9 wt%, TI: 5.2 wt%, S: 0.24 wt%.
[0051] (2) The heavy fraction of the medium and low temperature tar is sent to a hydrogenation reactor, and the heavy fraction of the medium and low temperature tar is hydrothermally decomposed in the presence of an iron-based catalyst. The mass of the iron-based catalyst accounts for 3% of the heavy fraction mass of the medium and low temperature tar, the iron-based catalyst described in this embodiment is FeS 2 ;
[0052] The pressure condition of the hydrothermal decomposition is 10MPa, and the temperature is 450°C; the feed rate of the medium and low temperature tar is 20kg / h, and the volume of hydroge...
Embodiment 3
[0060] The process for preparing needle coke raw material using medium and low temperature tar described in this embodiment includes:
[0061] (1) Distill the medium and low temperature tar in the distillation tower to separate the heavy fraction above 350°C;
[0062] Each index of described heavy distillate is as follows:
[0063] QI: 2.9 wt%, TI: 5.2 wt%, S: 0.24 wt%.
[0064] (2) The heavy fraction of the medium and low temperature tar is sent to a hydrogenation reactor, and the heavy fraction of the medium and low temperature tar is hydrothermally decomposed in the presence of an iron-based catalyst. The mass of the iron-based catalyst accounts for 0.8% of the heavy fraction mass of the medium and low temperature tar, the iron-based catalyst described in this embodiment is FeS 2 ;
[0065] The pressure condition of the hydrothermal decomposition is 12MPa, and the temperature is 550°C; the feed rate of the medium and low temperature tar is 20kg / h, and the volume of hydro...
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