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Oil-washing deep processing technology of coal tar

A technology for deep processing and coal tar, applied in the field of chemical engineering, can solve the problems of many separation methods, complicated operation process, single separation component, etc., and achieve the effect of reducing production cost, high economic value and convenient operation.

Inactive Publication Date: 2010-12-01
BAOSHUN TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned processes are complicated, involve many separation methods, and the separation conditions are not easy to realize.
And the separation component is single, which will inevitably cause waste of other high value-added substances and increase the difficulty of waste treatment

Method used

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  • Oil-washing deep processing technology of coal tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] As shown in the figure, the rectifying equipment of the present invention consists of a washing tower and eight rectifying towers. The wash oil fraction is a distillate with a distillation range of 230°C to 300°C. The washing oil fraction first passes into the washing tower through pickling and alkali cleaning process (the pickling and alkali washing method adopts the pickling and alkali washing method in the prior art), so that more than 99.0% of the quinolines are removed, and enter the naphthalene washing, Separation tower 2. The naphthalene washing and separation tower is composed of 80 trays, the raw material is added from the 40th tray, the flow rate is 3556kg / hr, the tower top pressure is 5Kpa, the tower top temperature is 130°C, and the reflux ratio is 5. Naphthalene with a concentration of more than 99.5% is produced at the top of the tower, and the bottom fraction enters the methylnaphthalene tower 3 . The methylnaphthalene tower is composed of 80 trays, the...

Embodiment 2

[0020] As shown in the figure, the rectifying equipment of the present invention consists of a washing tower and eight rectifying towers. The wash oil fraction is a distillate with a distillation range of 230°C to 300°C. The washing oil fraction first passes into the washing tower through pickling and alkali cleaning process (the pickling and alkali washing method adopts the pickling and alkali washing method in the prior art), so that more than 99.0% of the quinolines are removed, and enter the naphthalene washing, Separation tower 2. The naphthalene washing and separation tower is composed of 78 trays, the raw material is added from the 39th tray, the flow rate is 3556kg / hr, the reflux ratio is 4, the temperature at the top of the tower is 135°C, and the pressure at the top of the tower is 10KPa. Naphthalene with a concentration exceeding 99.6% is produced at the top of the tower, and the bottom fraction enters the methylnaphthalene tower 3 . The methylnaphthalene tower is...

Embodiment 3

[0022]As shown in the figure, the rectifying equipment of the present invention consists of a washing tower and eight rectifying towers. The wash oil fraction is a distillate with a distillation range of 230°C to 300°C. The washing oil fraction first passes into the washing tower through pickling and alkali cleaning process (the pickling and alkali washing method adopts the pickling and alkali washing method in the prior art), so that more than 99.0% of the quinolines are removed, and enter the naphthalene washing, Separation tower 2. The naphthalene washing and separation tower is composed of 74 trays, the raw material is fed from the 37th tray, the flow rate is 3556kg / hr, the reflux ratio is 6, the temperature at the top of the tower is 138°C, and the pressure at the top of the tower is 20KPa. Naphthalene with a concentration exceeding 99.4% is produced at the top of the tower, and the bottom fraction enters the methylnaphthalene tower 3 . The methylnaphthalene tower is co...

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Abstract

The invention relates to an oil-washing deep processing technology of coal tar. An oil-washing fraction is a distillate with the distillation range of 230 to 300 DEG C, the oil-washing fraction sequentially passes through a washing tower (1), a naphthalene washing separation tower (2), a methyl naphthalene tower (3), a methyl naphthalene separation tower (4), an indole and biphenyl tower (5), a dimethyl naphthalene tower (6), an acenaphthene tower (7), a dibenzofuran tower (8) and a fluorene tower (9); and eight substances of 1-methyl naphthalene, 2-methyl naphthalene, and the like are separated to obtain the 1-methyl naphthalene with the mass percentage of more than 96 percent, the 2-methyl naphthalene with the purity of more than 98 percent, naphthalene with the purity of more than 99 percent, 2,6-dimethyl naphthalene, acenaphthene, dibenzofuran, fluorene, and other high value-added products.

Description

technical field [0001] The invention belongs to the field of chemical engineering and relates to a coal tar washing oil deep processing technology. Background technique [0002] The wash oil fraction is the distillate with a distillation range of 230°C to 300°C cut during tar distillation. It contains many components with high added value and significance for further processing, such as methylnaphthalene, dimethylnaphthalene, biphenyl, indole, quinoline, fluorene, dibenzofuran and acenaphthene, etc. These components are widely used in industry and expensive, so their separation methods are getting more and more attention. [0003] In the prior art, some processes and methods have been proposed for the production and refining of several or a certain chemical product in the wash oil fraction. Such as Chinese Patent Publication No. CN1078991A, announced a kind of " extracting naphthalene fraction, methylnaphthalene fraction and industrial acenaphthene from coal tar washing oi...

Claims

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Application Information

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IPC IPC(8): C10C1/08C10C1/12C10C1/10
Inventor 许春建李成杰张新桥吴祥平
Owner BAOSHUN TECH CO LTD
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