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A special high-performance pitch for carbon materials and its preparation method

A high-performance, carbon material technology, applied to building insulation materials, processing tar pitch/petroleum pitch/natural pitch by distillation, processing tar pitch/petroleum pitch/natural pitch by chemical methods, etc., to reduce production costs and performance indicators Flexible and adjustable, high product value-added effect

Active Publication Date: 2021-08-24
鞍钢化学科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a preparation method of high-performance pitch for carbon materials, which can simultaneously obtain a new type of high-performance pitch for carbon materials that maintains good plasticity and fluidity, stable thermal reactivity, and uniformity in a wide temperature range under two heat treatments. It not only solves the problem of high-efficiency and high-value-added utilization of coal tar pitch, but also further optimizes the product structure, extends the industrial chain, and reduces production costs

Method used

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  • A special high-performance pitch for carbon materials and its preparation method

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preparation example Construction

[0044] Such as figure 1 As shown, the preparation method of a special high-performance pitch for carbon materials according to the present invention, the special high-performance pitch for new carbon materials includes rectified pitch B and refined hydrogenated pitch D; its preparation process includes the following steps:

[0045] Step 1. Under an inert atmosphere, according to the activation energy of the highly reactive components contained in the raw pitch, by controlling the thermal reaction temperature, the raw pitch is subjected to preliminary thermal condensation to form a microcrystalline unit. The obtained intermediate is called pre- Poly asphalt;

[0046] Step 2: Mix the prepolymerized bitumen obtained in step 1 with the first solvent according to the set agent-oil ratio, and after fully stirring, separate by standing and settling, and obtain light phase oil and heavy phase oil according to the set separation ratio; The solvent-oil ratio of poly asphalt to the firs...

Embodiment 1

[0074] In this example, the raw asphalt is coal-based soft asphalt with a softening point of 30°C. According to its quinoline insoluble content of 1.83%, it is added to a stainless steel reaction kettle under the protection of high-purity nitrogen, and the temperature is 3°C / min. Raise the temperature from room temperature to 400°C, and stay at constant temperature for 4 hours to form microcrystalline units and obtain prepolymerized pitch.

[0075] Mix the pre-polymerized asphalt and washing oil at a mass ratio of 3:1, stir well at a temperature of 120°C, and then pour it into a static settling device with a length-to-diameter ratio of 8:1 for static settling and separation. The settling temperature is 130°C , the settling time is 3h, and then the light phase oil and heavy phase oil are separated according to the mass ratio of 8:2, and the density of the light phase oil is determined to be 1.0g / cm 3 , the density of the heavy phase oil is 1.3g / cm 3 .

[0076] Pour the light ...

Embodiment 2

[0080] In this example, the raw material pitch is a coal-based medium-temperature pitch with a softening point of 70°C. According to its quinoline insoluble matter content of 3.85%, it is added to a stainless steel reaction kettle under the protection of high-purity nitrogen, and the temperature is 2°C / min from room temperature to 390°C, and stay at constant temperature for 5 hours to form microcrystalline units and obtain prepolymerized pitch.

[0081] Mix the pre-polymerized bitumen and dianthracene oil at a mass ratio of 2:1. After fully stirring at 150°C, pour it into a static settling device with a length-to-diameter ratio of 9:1 for settling and separation. The settling temperature is 140°C and the settling time is 3h, then separate the light phase oil and heavy phase oil according to the mass ratio of 7:3, and measure the density of the light phase oil to be 0.9g / cm 3 , the density of the heavy phase oil is 1.2g / cm 3 .

[0082] Pour the light phase oil into the disti...

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Abstract

The present invention relates to a preparation method of high-performance asphalt special for carbon materials. The raw material coal tar pitch is preliminarily thermally condensed to form a microcrystalline unit, and then two kinds of solvents are used to cut the components respectively, and then through asphaltization, thermal separation, pressure filtration, Distillation, hydrogenation and other treatments can simultaneously obtain high-performance asphalt for new carbon materials that maintains good plasticity, good fluidity, stable thermal reactivity, and uniformity in a wide temperature range under two heat treatments; one of them can be used as impregnating agent asphalt, Binder pitch, special pitch, spinnable pitch for general-purpose carbon fiber, lithium-ion battery negative electrode material, ultra-high-power graphite electrode, spherical activated carbon, etc.; the other can be used as coal mesophase pitch, high-performance carbon Raw materials for fiber-spinnable pitch, high thermal conductivity foam carbon, etc. The performance index of the product prepared by the invention is flexible and adjustable, which can better adapt to market changes and reduce business operation risks.

Description

technical field [0001] The invention relates to the technical field of high-efficiency utilization of coal tar pitch, in particular to a special high-performance pitch for carbon materials and a preparation method thereof. Background technique [0002] Coal tar pitch is a bulk product separated from coal tar processing, accounting for about 50-60% of coal tar. Its processing and utilization level is crucial to the entire coal tar processing and the development and preparation of carbon materials. Coal tar pitch is a complex mixture of polycyclic aromatic hydrocarbons, which has the characteristics of high molecular weight, high aromaticity, high condensation degree, high carbon content, relatively low heteroatom and metal content, and is a high-quality precursor for the preparation of functional carbon materials. . The rational design of the chemical composition and molecular structure of coal tar pitch, and the construction of functional carbon materials with coal tar pitc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00
CPCC10C3/02C10C3/06
Inventor 何莹刘海丰张大奎穆春丰
Owner 鞍钢化学科技有限公司
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