Method for preparing various carbon materials by using low-temperature carbonized coal tar pitch

A technology of coal tar pitch and carbon materials, applied in the processing of tar pitch/petroleum pitch/natural pitch, processing tar pitch/petroleum pitch/natural pitch by chemical methods, processing tar pitch/petroleum pitch/natural pitch by selective extraction, etc. It can solve the problems of low value and waste of chemical resources, etc., and achieve the effect of simple and feasible process, easy operation and strong controllability

Active Publication Date: 2014-10-15
SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country has abundant reserves of this type of coal, and the resulting low-temperature dry distillation coal tar pitch is relatively large, about more than one million tons per y

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] 【Example 1】

[0043] Put the low-temperature dry distillation coal tar pitch in the reaction kettle, raise the temperature under normal pressure, cut the fraction before 300°C, and the gas phase reaches a maximum of 320°C, stop heating, lower the temperature, and separate the heavy and light components.

[0044] Light components can be sold as high value-added products or used as raw materials for the production of clean fuel oil or for diesel octane modification.

[0045] The heavy component was loaded into a pressurized reactor, and polymerized under a pressure of 1.5 MPa, and the temperature was raised to 380 °C at 5 °C / min, and the temperature was kept constant for 5 hours to obtain a polymerized asphalt product. According to the national standard, the quinoline insoluble content is 0.45%, the softening point is 113°C, and the coking value is 58%. It can be used as high-quality impregnating asphalt.

Example Embodiment

[0046] [Example 2]

[0047] Put the low-temperature carbonized coal tar pitch in the reaction kettle, distill under reduced pressure at a vacuum of 0.07MPa, raise the temperature and cut off the fraction before 230°C, the gas phase reaches a maximum of 240°C, stop heating, lower the temperature, and separate the heavy and light components.

[0048] Light components can be sold as high value-added products or used as raw materials for the production of clean fuel oil or for diesel octane modification.

[0049] The heavy component was loaded into the reactor, and polymerized under normal pressure, the temperature was raised to 430°C at 4°C / min, and the temperature was kept constant for 14 hours to obtain the polymerized asphalt product. According to the national standard analysis, the content of quinoline insolubles is 3.51%, the content of toluene insolubles is 32.48%, the content of beta resin is 28.97%, the softening point is 118°C, and the coking value is 63%. Can be used a...

Example Embodiment

[0050] [Example 3]

[0051] Mix and extract low-temperature carbonized coal tar pitch and furfural at an agent-to-oil ratio of 2:1, stir at 80°C for 2.5 hours, and settle for 2 hours. The extracted phase is the heavy component, and the raffinate phase is the light component. The solvent furfural in the two phases can be removed by distillation, and the solvent can be recycled and reused.

[0052] Light components can be sold as high value-added products or used as raw materials for the production of clean fuel oil or for diesel octane modification.

[0053] According to the national standard analysis and detection of heavy components, the content of quinoline insolubles is 0.06%, the content of toluene insolubles is 3.56%, and the softening point is 40°C. It meets the raw material index requirements for needle coke production and can be used to produce needle coke.

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Abstract

The invention relates to a method for preparing various carbon materials by using low-temperature carbonized coal tar pitch. Through utilizing the characteristic that the low-temperature carbonized coal tar pitch is low in quinoline insoluble substance content, the various carbon materials such as saturant pitch, agglomerant pitch or needle coke raw material pitch can be prepared via simple technological processing, and the added value of a product is improved. The technological method comprises a raw material pretreatment process and a polymerization reaction process. Compared with the prior art, the invention has the benefits as follows: firstly, the method is simple and practical, can easily realize industrialized production, provides a novel approach for the processing of the low-temperature carbonized coal tar pitch, and increases the added value of the low-temperature carbonized coal tar pitch prominently; secondly, through controlling polymerization reaction conditions, pitch products for different application are obtained, and the process is easy to operate, and strong in controllability; thirdly, the method is in conformity with the call of Chinese government on advocating high-efficient energy utilization, and can alleviate the condition of energy shortage.

Description

technical field [0001] The invention relates to the technical field of low-temperature dry distillation coal tar pitch processing and application, in particular to a method for preparing various carbon materials such as impregnating agent pitch, binder pitch, or needle coke raw material pitch by using low-temperature dry distillation coal tar pitch. Background technique [0002] With the increasing shortage of petroleum resources, the development and utilization of coal tar pitch has been paid attention to. Coal tar pitch, the full name of coal tar pitch, includes high temperature coal tar pitch, medium temperature coal tar pitch and low temperature coal tar pitch. At present, the processing technology of high temperature coal tar pitch and medium temperature coal tar pitch is relatively mature and widely used, such as in the preparation of isotropic Isotropic graphite materials are used as binders or road construction asphalt, etc., while low-temperature carbonization coal ...

Claims

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Application Information

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IPC IPC(8): C10C3/00C10C3/02C10C3/08
Inventor 屈滨朱来福刘海丰郭明聪何凤祥
Owner SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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