Method for increasing utilization ratio of additional value of high-temperature coal tar

A high-temperature coal tar, value-added technology, applied in refining to change the hydrocarbon structure skeleton, etc., can solve the problems of low price, waste of chemical product resources, affecting the economic benefits of tar processing enterprises, etc. The effect of improving economic efficiency

Active Publication Date: 2014-12-10
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Application Information

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Problems solved by technology

[0002] my country is rich in coal tar resources, among which low- and medium-temperature coal tars are mainly aliphatic compounds and less aromatics. The important direction of research is to process them as unconventional petroleum resources to produce clean fuel oil ( clean coal technology , 2011,17:31-35; Fuel, 2011, 90:3404-3409; Fuel, 2012, 91:33-39.); High-temperature coal tar is one of the main secondary chemical products recovered from coking gas. It is rich in unique aromatic fused ring compounds, and its aromaticity is above 0.9. It is a valuable chemical resource. In the existing distillation and separation process, the yield of coal tar pitch is as high as about 55%, and the outlet of coal tar pitch has always been the bottleneck problem restricting the coal tar processing industry, and its low price has seriously affected the economy of tar processing enterprises Benefits, coupled with the current situation of high oil prices, force a large amount of high-temperature coal tar to be abandoned and burned directly as fuel, seriously wasting precious chemical product resources

Method used

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  • Method for increasing utilization ratio of additional value of high-temperature coal tar
  • Method for increasing utilization ratio of additional value of high-temperature coal tar
  • Method for increasing utilization ratio of additional value of high-temperature coal tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 0.09 g modified organomontmorillonite-supported metal nickel catalyst, 3.0 g coal tar, 1.5 g toluene solvent (the mass ratio of toluene / coal tar is 0.5) and 0.3 g n-dodecane internal standard ( The amount of internal standard added is 10 wt% of the weight of coal tar). After sealing, first use H 2 Replaced 3 times to remove the air in the kettle, and then put the H in the kettle 2 Adjust it to 5.0 MPa, check the airtightness of the device and confirm that there is no leakage, react at a reaction temperature of 300 °C for 1.0 h, and take out the reaction product after cooling to room temperature for gas chromatography analysis. See Table 1 for the naphthalene and asphalt contents in the hydrogenation product measured by the internal standard method.

Embodiment 2

[0024] Except that the mass ratio of toluene / coal tar is 4 and the mass ratio of catalyst / coal tar is 0.08, the others are the same as in Example 1. The naphthalene content and asphalt content in the hydrogenation product measured by the internal standard method are shown in Table 1.

Embodiment 3

[0026] In addition to the H in the kettle 2 Adjusted to 3.0 MPa, the rest is the same as in Example 1. The naphthalene content and asphalt content in the hydrogenation product measured by the internal standard method are shown in Table 1.

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Abstract

The invention discloses a method for increasing the utilization ratio of the additional value of high-temperature coal tar, belonging to the technical field of chemical industry. According to the method, the selective catalytic hydrogenation conversion reaction of the high-temperature coal tar is carried out through a high-pressure reaction device under the action of a hydrogenation catalyst by taking the high-temperature coal tar or a high-temperature coal tar solution obtained by mixing the high-temperature coal tar and an organic solvent according to a certain mass ratio as a raw material, so that a condensed-ring aromatic compound and particularly coal pitch in the high-temperature coal tar are directionally converted into a low-ring aromatic compound, wherein the high-temperature coal tar can directly enter the current high-temperature coal tar processing device after being subjected to selective hydrogenation and quality improvement so as to be subjected to the subsequent separation, processing and utilization; and the coal pitch in the high-temperature coal tar subjected to the selective hydrogenation and quality improvement can be used for producing a high-performance carbon material. By using the method, not only is the bottleneck problem generated in processing of the high-temperature coal tar for treating the coal pitch solved, but also the high utilization ratio of the additional value of the high-temperature coal tar is realized under the condition that the traditional high-temperature coal tar processing method is not changed.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to the high value-added utilization of high-temperature coal tar. Background technique [0002] my country is rich in coal tar resources, among which low- and medium-temperature coal tars are mainly aliphatic compounds and less aromatics. The important direction of research is to process them as unconventional petroleum resources to produce clean fuel oil ( clean coal technology , 2011,17:31-35; Fuel, 2011, 90:3404-3409; Fuel, 2012, 91:33-39.); High-temperature coal tar is one of the main secondary chemical products recovered from coking gas. It is rich in unique aromatic fused ring compounds, and its aromaticity is above 0.9. It is a valuable chemical resource. In the existing distillation and separation process, the yield of coal tar pitch is as high as about 55%, and the outlet of coal tar pitch has always been the bottleneck problem restricting the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/58
Inventor 水恒福任世彪曹先中雷智平王知彩
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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