Preparation method of high softening point asphalt and foam carbon based on the same

Abstract

The invention discloses a preparation method of a high softening point asphalt and foam carbon based on the asphalt. Preparation of the high softening point asphalt comprises the steps of: separating slag with a QI content of 20-45wt% from maltha, and subjecting the slag to heat polycondensation at 220-320DEG C to obtain high softening point asphalt with a softening point of 220-320DEG C. Preparation of the foam carbon comprises the steps of: crushing the high softening point asphalt, performing heating to 600DEG C at a rate of 10DEG C / min, conducting heat preservation, and carrying out reaction to obtain foam carbon. The method provided by the invention has the advantages that: 1) relative to mesophase asphalt, the production cost of the high softening point asphalt prepared from slag phase in the asphalt purification process is low; and 2) the slag phase has very narrow cluster composition distribution, the high softening point asphalt generated by polycondensation also has narrow cluster composition, therefore foaming under a near normal pressure can be realized, and the preparation cost of foaming equipment can also be greatly reduced.

Description

technical field [0001] The invention relates to a method for preparing high softening point pitch used as raw material for producing low thermal conductivity foam carbon. The invention belongs to a preparation method of high softening point asphalt with a softening point of 220-320 DEG C and a quinoline insoluble (QI) content of 50-75 wt%. Background technique [0002] At present, the raw materials used to prepare foamed carbon mainly include mesophase pitch, phenolic resin and coal, and foamed carbon is prepared at relatively high foaming temperature and pressure (600°C / 7-10MPa). So far, the industrialized production of foamed carbon has not been realized in China. The fundamental reasons are: 1) It is difficult to achieve continuous production in the industry with high temperature and high pressure foaming technology, and there are problems of high equipment cost and production safety; 2) Mesophase pitch is a kind of The carbonaceous precursor that is easy to graphitize i...

AI Technical Summary

Problems solved by technology

It should be pointed out here that the higher the foaming pressure, the easier it is to suppress the diffusion or escape of gas from the bubbles to the matrix carbon, and the easier it is to prepare foamed carbon with better foaming effect; however, when the foaming pressure is close to normal pressure , the pyrolysis gas formed from the carbonaceous precursor can easily escape directly during the foaming process, and it is difficult to form bubbles

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