A coal-based needle coke raw material pretreatment process

A needle coke raw material and pretreatment technology, applied in coking carbonaceous materials, coking ovens, petroleum industry, etc., can solve problems such as difficult separation of suspended bed catalyst powder, infiltration of heavy metals, coking deactivation, etc.
CN109517613BActive Publication Date: 2020-10-20山西中科化美科技有限责任公司
2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
山西中科化美科技有限责任公司
Publication Date
2020-10-20

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention belongs to the technical field of preparation of coal based needle coke, and particularly relates to a coal based needle coke material pretreatment process, comprising the following steps: jointly stirring the cola based needle coke material, coal based solvent and petroleum based solvent, settling, dividing into a heavy phase and a light phase, pumping out the heavy phase and sending to the outside, distilling the light phase, wherein one part of gaseous phase after distillation is taken as overhead reflux, the other part is taken as a circulating solvent and returns to a mixingtank; enabling quinoline insoluble pitch and hydrogen-donor solvent to generate hydrogenation reaction in a hydrogenation reactor, sending the material after hydrogenation into a rectifying tower, wherein one part is taken as tower bottom reflux, and the other part is sent into the mixing tank at the bottom of the rectifying tower; cooling part of dehydrogenation solvent gaseous phase by a condenser at the top of the rectifying tower and then flowing into a tank at the top of the rectifying tower, wherein one part is taken as rectifying tower top reflux, the other part is heated by a heatingfurnace together with hydrogen and then sent into a hydrogen-donor solvent hydrogenation reactor, the hydrogen-donor solvent after re-hydrogenation is divided into gaseous phase circulating hydrogen and liquid phase circulating hydrogen-donor solvent by a gas-liquid separator.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of coal-based needle coke preparation, and in particular relates to a coal-based needle coke raw material pretreatment process. Background technique

[0002] Needle coke is a high-quality carbon material with the advantages of low ash, low thermal expansion, high conductivity, and high anisotropy. It is widely used in many fields such as high-power / ultra-high-power graphite electrodes, lithium battery negative electrode materials, and special graphite materials. . According to different raw materials, it can be divided into coal-based needle coke and oil-based needle coke. At present, the pretreatment methods of coal-based needle coke raw materials include solvent method, reforming method, centrifugation method, etc. These methods cannot effectively remove heteroatoms such as sulfur and nitrogen in the raw material, and directly affect the sulfur content of needle coke products, Key indicators such as nitr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More