Method for extracting multiple chemical products from coal-tar oil

[0020] Referring to accompanying drawing, the present invention is carried out by following processing steps:

[0021] 1. Dehydration

[0022] Heat 100kg of coal tar to 120°C through the heat exchanger 9, enter the dehydration tower 1, and reflux it for a period of time. After the operation is stable, cut off the water and light oil on the top of the tower, and let it stand to separate the light oil product. The tar at the bottom of the tower is sent to the next process for processing.

[0023] 2. Initial distillation

[0024] The tar from which water and light oil have been removed is heated to 290°C by the tubular furnace 2 and then enters the distillation tower 3, and the triple-mixed fraction at 185°C-249°C is cut from the top of the tower and sent to the scrubber 4 for dephenolization, and the heavy oil distilled from the bottom of the tower The fraction enters the heating furnace 7 for heating, and the dephenolization of the three mixed fractions is washed with 30% sod...

[0035] Referring to accompanying drawing, the present invention is carried out by following processing steps:

[0036] 1. Dehydration

[0037] Heat 100kg of coal tar to 130°C through the heat exchanger 9, enter the dehydration tower 1, and reflux it for a period of time. After the operation is stable, cut off the water and light oil on the top of the tower, and let it stand to separate the light oil product. The tar at the bottom of the tower is sent to the next process for processing.

[0038] 2. Initial distillation

[0039] The tar from which water and light oil have been removed is heated to 300°C by the tube furnace 2 and then enters the distillation tower 3, and the triple-mixed fraction at 186°C-246°C is cut from the top of the tower and sent to the scrubber 4 for dephenolization, and the heavy oil distilled from the bottom of the tower The fraction enters the heating furnace 7 for heating, and the dephenolization of the three mixed fractions is washed with 15% sodium...

[0049] Referring to accompanying drawing, the present invention is carried out by following processing steps:

[0050] 1. Dehydration

[0051] Heat 100kg of coal tar to 125°C through the heat exchanger 9, enter the dehydration tower 1, and reflux it for a period of time. After the operation is stable, cut off the water and light oil at the top of the tower, and let it stand to separate the light oil product. The tar at the bottom of the tower is sent to the next process for processing.

[0052] 2. Initial distillation

[0053] The tar from which water and light oil have been removed is heated to 295°C by the tube furnace 2 and then enters the distillation tower 3, and the triple-mixed fraction at 187°C-247°C is cut from the top of the tower and sent to the scrubber 4 for dephenolization, and the heavy oil distilled from the bottom of the tower The fraction enters the heating furnace 7 for heating, and the dephenolization of the three mixed fractions is washed with 20% sodium...