Method for preparing high-purity dipping asphalt

Abstract

The invention, relating to the preparation technique of asphalt materials, particularly discloses a method for preparing high-purity dipping asphalt. The method comprises the following steps: step 1, preparing an extracting agent by mixing 57-63 wt% of washing oil and 37-43 wt% of diesel oil; step 2, putting middle-temperature liquid asphalt and the extracting agent in a mixing kettle according to the weight ratio of 1:1, stirring for 1.5-2 h at a kettle temperature of 148-152 DEG C, then pumping into a standing settler, standing for more than 24 h at a temperature of 140-150 DEG C, and pumping into the asphalt liquid having a required purity in a distilling still; step 3, steaming out distillates of the extracting agent by using an underpressure distillation method, and finally carrying out cooling forming by a forming machine. A product obtained by the invention has high purity, wherein the content of quinoline insolubles is generally less than 0.5 %, and the minimum content can be less than 0.1 %, and the product can satisfy the high request for utilization, and the steps are simple, and the preparation cost is low.

Description

technical field [0001] The invention relates to the manufacturing technology of asphalt materials, in particular to a preparation method of high-purity impregnated asphalt. Background technique [0002] At present, in graphite products, electric carbon products, electronics industry, new energy and other industries, there is an urgent need for high-quality impregnated pitch. [0003] High-purity impregnated asphalt is a high-purity asphalt obtained by separating out quinoline insoluble matter under a certain working temperature process condition with medium-temperature asphalt as raw material. It has a wide range of uses and is important. Densifying and reinforcing agent for plain products is an important basic material, widely used in metallurgy, electronics, machinery, aerospace, new energy development, nuclear industry, medicine, military industry and other fields, for example: 1. It is indispensable for power lithium batteries The missing raw material; 2. It is a densif...

AI Technical Summary

Problems solved by technology

Due to the high manufacturing cost and low output of high-purity impregnated asphalt products, most industries use ordinary medium-temperature coal tar pitch instead, resulting in low product quality, high energy consumption, and poor quality. It is difficult to meet high use requirements and hinder the metallurgical industry. , electronics industry, new energy and other industries product upgrades