Method for preparing carbon material by use of heavy oil

Abstract

The invention discloses a method for preparing a carbon material by use of heavy oil. The method adopts the heavy oil as a raw material to produce intermediate-phase spun asphalt, isotropic spun asphalt and COPNA resin through the following steps: 1, pretreating the heavy oil, and removing free carbon granules and dimethyl benzene insoluble substances from the heavy oil to obtain refined heavy oil; 2, treating the refined heavy oil through a proper thermal poly-condensation process to obtain pyrolysis heavy oil; 3, dissolving, washing and separating the pyrolysis heavy oil by use of dimethyl benzene to obtain a dimethyl benzene soluble component and a dimethyl benzene insoluble component; 4, dissolving the dimethyl benzene insoluble component by use of a hydrogenated heavy solvent and performing a hydrogenation and co-carbonization reaction to obtain hydrogenated asphalt; 5, thermally treating the hydrogenated asphalt to obtain intermediate-phase asphalt; 6, separating the solvent from the dimethyl benzene soluble component obtained in the step 3 and removing the dimethyl benzene solvent to obtain the soluble component; 7, recycling a part of the soluble component in the step 2 and making the part have thermal poly-condensation with the refined heavy oil, and thermally treating the other part to obtain the isotropic spun asphalt; and 8, letting distillate oil which is at a temperature lower than 350 DEG C and obtained by separation during the thermal treatment in the step 7 have a cross-linkage reaction with a cross-linking agent to obtain the CNPNA resin.

Description

technical field [0001] The invention belongs to the fields of new carbon materials and fuel chemical industry, and in particular relates to a method for preparing carbon materials from heavy oil, which is applicable to industrial scale. technical background [0002] my country is one of the major energy countries in the world. Statistics show that the annual output of coke in my country is about 400 million tons, accounting for 60% of the world's coke production, and the output of coal tar recovered from coking gas is 18 million tons per year. The oil processing capacity reaches 400 million tons / year, and the heavy oil produced by various processing methods reaches 60 million tons / year. However, the utilization methods of coal series and petroleum series heavy oil are very limited now. In fact, most of the applications only stay at the primary level of road construction, anti-corrosion, waterproof materials or final burning. Therefore, how to effectively utilize heavy oil ...

AI Technical Summary

Problems solved by technology

However, these patents are all aimed at the preparation method of a certain carbon material and cannot be adjusted flexibly. At the same time, they are used to produce high-performance carbon fiber raw materials (mesophase pitch) and general-purpose carbon fiber raw materials (isotropic pitch). ) and impregnants for C / C composites, binders for carbon materials, and thermosetting COPNA resins

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